JPH1014896A - Digital Holter monitor and digital biological information recording method - Google Patents

Abstract

(57) [Summary] [Problem] To provide a digital holter electrocardiograph and a digital biometric information recording method that can make use of recorded information even if a value depressed on the way is generated. SOLUTION: Electrocardiogram information is collected from electrocardiogram electrodes 12 and 13, converted into digital information by an A / D converter 10, and recorded in a flash memory 4 as digital information. At this time, if the device abnormality is detected by the device abnormality detection circuit 8, the CP
U1 restarts the device. When the flash memory 4 is restarted, the contents of the flash memory 4 are checked, and the recording of the electrocardiogram information is restarted after the dummy information, the cause of abnormality, and the date and time are continuously stored for a predetermined time in the storage area before the restart.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a digital holter electrocardiograph of a type for recording electrocardiogram information as a digital signal and a digital biometric information recording method.

[0002]

2. Description of the Related Art A conventional Holter electrocardiograph generally employs an analog system, in which an electrocardiogram signal waveform is directly amplified and directly recorded as analog information on, for example, a magnetic tape. In this case, for example, the power is turned off due to an abnormality in the electrocardiograph, or even when the device is initialized, after the device is started unless the magnetic tape recording the biological information is rewound, Since it is only necessary to write the data after the stop of the magnetic tape, the recorded contents are not interrupted or destroyed.

For this reason, it has been possible to perform reproduction analysis by performing a dedicated process on the reproduction device side. Therefore, the protection processing for the already recorded biological information is such that no rewind control is performed, and no special control is performed.

[0004]

However, a digital holter electrocardiograph which recently records digitized electrocardiogram information in a large-capacity IC memory (flash memory) which has recently appeared has been used during recording of the electrocardiogram information. Continuous recording of electrocardiogram information becomes impossible in the event of a momentary power interruption (battery disconnection, etc.), an interface error with the flash memory card, or a runaway of the CPU program in the device. In such a case, since the processing program is stopped or initialized, continuous recording cannot be performed, and the data up to that point is still recorded.

[0005] Alternatively, if the apparatus is restarted carelessly, the contents recorded so far will not be left, and the measurement data recorded so far will be overwritten. could not. For this reason, recording of the electrocardiogram information could not be continued, and no measures could be taken on the reproducing side.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem, and solves the above-mentioned problem. It is an object of the present invention to provide a digital Holter electrocardiograph and a digital biological information recording method that can make use of the recorded information. For example, the following configuration is provided as one means for achieving such an object.

That is, in a digital holter electrocardiograph comprising a storage means for storing digital information and a recording control means for collecting electrocardiogram information from a living body and recording the digital information in the storage means, the apparatus is operating normally. Determination means for determining whether or not the above is true, a restart means for restarting the apparatus when the determination means detects an operation abnormality of the apparatus, and a check of the contents of the storage means when restarted by the restart means. Inspection means for inspecting a storage area before restart, and permission means for permitting the recording control means to record electrocardiogram information after storing dummy information for a predetermined time continuously in the storage area before restart by the inspection means. And characterized in that:

[0008] For example, the recording control means repeats the recording of the electrocardiogram information a predetermined number of times if the recording of the electrocardiogram information is not normally performed after the permission of the recording of the electrocardiogram information by the permitting means. When the recording of the electrocardiogram information is not performed normally, the factor and the date and time are held. Further, for example, furthermore, display means for displaying an operation state, and when the recording of the electrocardiogram information is not normally performed even by the repetitive recording control of the storage means by the recording control means a predetermined number of times, the display means is provided with the display means. And a notifying means for notifying the user.

Further, for example, the detecting means determines that the operation of the apparatus is abnormal when detecting an instantaneous interruption of the power supply. Alternatively, the digital Holter monitor further includes a program storage unit that stores a program, a central control unit that controls the entire apparatus according to a program stored in the program storage unit, and performs time measurement at a constant interval. The central control means includes a watchdog timer for setting, and the determination means determines that the central control means is abnormal when the watchdog timer is not set for a predetermined time, and determines that the operation of the apparatus is abnormal.

[0010] Further, for example, the determination means determines that the apparatus is abnormal when the storage in the storage means is not performed normally.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. (First Embodiment of the Invention) FIG. 1 is a block diagram showing a configuration of a digital holter electrocardiograph as an example of an embodiment of the invention according to the present invention. In FIG. 1, reference numeral 1 denotes a CPU that controls the entire embodiment according to a control procedure stored in a ROM 2, reference numeral 2 denotes a ROM that stores the above-described control procedures and the like, and reference numeral 3 denotes a temporary storage of various processes. RA to remember
Reference numerals M and 4 denote flash memories for storing electrocardiogram information and the like collected in the present embodiment in the form of digital data. The flash memory 4 is configured in a detachable card shape, is configured to be easily detachable from the main body, set in an electrocardiogram information processing apparatus described later, and to be able to read stored contents.

Reference numeral 5 denotes a timekeeping unit which is a real-time clock for displaying time, and 6 denotes a display unit for displaying a detected electrocardiogram waveform or the like from a biological electrode. In this embodiment, a liquid crystal display L is used.
It is composed of CD. Reference numeral 7 denotes a switch circuit for setting various operation conditions. In the embodiment of the present invention, the switch setting state of the switch circuit 7 is connected to the input port of the CPU 1, and the CPU 1 can always recognize the setting state of the switch circuit 7 by reading this input port.

8 determines whether or not the apparatus is operating normally and determines that an abnormal operation of the apparatus has occurred.
This is a device abnormality detection circuit that outputs a RESET signal, initializes each piece of information except recording data in the flash memory 4, and notifies the CPU 1 that the device has been restarted due to a device abnormality. CPU
When the device abnormality detection circuit 8 determines that the device is abnormal, the device 1 executes a restart process described later.

When the apparatus abnormality detecting circuit 8 determines that the apparatus is abnormal, it outputs an interrupt signal to the CPU 1 to notify that the apparatus abnormality has been detected, and restarts the CPU 1. This notification signal is connected to the input port and the interrupt input of the CPU 1, and the CPU 1 can recognize the state at the time of restart by reading the corresponding input port at the time of restart.

Reference numeral 9 denotes a power supply circuit for supplying drive power to the entire apparatus. In this embodiment, the power supply circuit is driven by a battery. An analog-digital converter (A / D converter) 10 converts analog detection information from a living body into corresponding digital information. An acceleration data detector 11 detects movement information of the living body (posture information of the living body). Reference numeral 12 denotes an electrocardiogram electrode for collecting electrocardiogram information, which is composed of a first channel and a second channel. Reference numeral 13 denotes an ECG electrode for collecting ECG information, and collects ECG information of the third channel. Reference numeral 15 denotes a respiration data detection unit that detects respiration data.

The A / D converter 10 can be connected to the acceleration data detector 11 and the ECG electrode 12 at all times, and can be connected to either the ECG electrode 13 or the respiratory data detector 15. I have. Further, reference numeral 20 denotes a serial communication control unit which can be provided as an option. The serial communication control unit 20 can directly perform data communication with another device via a communication medium. For example, as shown in FIG. 1, it is also possible to connect to a predetermined communication network 30, and to directly transfer the collected electrocardiogram information to another communication device 40 via the communication network 30. In this case, for example, even if communication is performed according to a control procedure stored in the ROM 2 in advance, or transferred from another communication device, for example, the communication device 40,
Data transfer may be performed under the communication control instructed to execute.

FIG. 2 shows a detailed configuration of the device abnormality detection circuit shown in FIG. In the device abnormality detection circuit 8 shown in FIG.
A power supply abnormality detection circuit 81 detects a power supply abnormality such as an instantaneous interruption of the power supply circuit 9, and outputs a power supply abnormality signal 91 to the device restart circuit 85 when the power supply abnormality is detected. This power supply abnormality is detected, for example, by presetting a threshold value for determining that the power supply voltage is abnormal, constantly monitoring each drive power supply, and determining that an instantaneous interruption has occurred when the power supply voltage is below the threshold value for a predetermined period of time. I do.

In this embodiment, it is assumed that temporary noise generation due to the influence of an external radio wave does not affect the normal operation of the apparatus. Judge as a momentary interruption. Also, 8
Reference numeral 2 denotes a watchdog timer circuit which has a timer circuit configuration for constantly counting time and operates so as to be always set at regular intervals during execution of the program of the CPU 1, and is several times the time interval set by the CPU 1. When the elapsed time is counted, it is determined that the program is not executed normally due to runaway of the program of the CPU 1 or the like. When the execution abnormality of the program is determined, a program abnormality signal 92 is output to the device restart circuit 85.

Reference numeral 83 denotes a recording error detection circuit,
When the recording error occurrence flag is set from 1, the flag is latched, and the recording error signal 93 is sent to the device restart circuit 85.
Output as At the time of controlling the recording of the collected digital electrocardiogram information or the like in the flash memory 4, the CPU 1 first controls the writing of the collected information to the flash memory 4, reads out the contents written in the flash memory 4 after executing the writing control, and checks the contents. As a result of this collation, if the write information and the read information do not match, the retry is performed a predetermined number of times (three times in the embodiment of the present invention). If the recording is not successful even after the predetermined number of retries, the recording error signal 97
Is output to set a recording error in the recording error detection circuit 83. Note that this collation operation is not limited to the case where the CPU 1 performs the operation. The CPU 1 performs only the write control to the flash memory 4 and reads the write information input in the flash memory 4 and the information actually written. A function to perform verification and inform the CPU 1 when writing is not performed normally. Based on this notification, the CPU 1 performs three retries, for example. If it is not possible to write the data, a recording error is set in the recording error detection circuit 83.

Reference numeral 85 denotes a device restart circuit, which outputs a reset signal RESET to each component except the recorded contents of the flash memory 4 when the above-described power supply abnormal signal 91, program abnormal signal 92, and recording error signal 93 are input. Then, each component is initialized. Further, the device restart circuit 85
Is provided with a reset switch 86 so that the device can be manually restarted, and this switch is disposed at a location on the outer surface of the device where it cannot be operated carelessly. Therefore, by operating this reset switch, the device can be manually forcibly terminated.

The device restart circuit 85 simultaneously outputs the CP
An interrupt signal to U1 and status information at the time of the interrupt can be output. This interrupt is configured so that the CPU 1 can recognize the cause of the restart when the apparatus is restarted. By writing this status information into the flash memory 4 at the time of restart, the CPU 1 can easily recognize the cause of the restart by the biological information processing apparatus that analyzes the recorded biological information.

The present invention is not limited to the above example. When the program of the CPU 1 is operating normally, when the CPU 1 is interrupted, the status information at that time is first read and stored in the flash memory 4. After writing, the CPU 1 may restart with its own program or turn off the power. In the embodiment of the present invention, the above configuration is provided, and normal electrocardiogram information collection processing is performed by the following operation. When the present device is used for collecting electrocardiogram information, the flash memory 4 is mounted on the device when the flash memory 4 is not mounted on the device. In this case, by initializing the storage contents of the flash memory 4 to predetermined data in advance, it is possible to easily recognize the extent to which the collected information has been written when a device abnormality described later occurs.

Next, the electrocardiogram electrodes 12 and 13 are attached to predetermined measurement sites of an electrocardiogram information measurer. In addition, it is set so that acceleration data is detected by an optional acceleration data detection unit 11 as necessary. Then, the device is activated to start collecting electrocardiogram information. The A / D converter 10 amplifies the detected biological signal from the electrocardiogram electrodes 12 and 13 to a predetermined level, and then converts the input signal to a corresponding digital signal in a time-division manner by 125 Hz sampling (sampling at a cycle of 8 ms). Sequentially writes this digital signal in a predetermined area of the flash memory 4 together with the clock time information of the clock unit 5. In addition,
The CPU 1 causes the LCD display unit 6 to display the signal level of the digital ECG signal, for example, in the form of a bar graph. This makes it possible to determine whether or not the ECG electrode is in a good condition.

In this manner, the detection and recording operation of the electrocardiogram signal is continued as long as the storage capacity of the flash memory 4 permits. In the case where the recording is performed for a longer time and the storage capacity of the flash memory 4 is exhausted, the operation may be performed so as to stop the measurement here, or the data may be overwritten again from the first written position. The control may be such that the electrocardiogram signal for the latest predetermined time is always recorded.

When the work of measuring and recording the electrocardiogram information and the like is started, the device abnormality detecting circuit 8 constantly determines whether or not a device abnormality has occurred. When it is determined that the device is abnormal, the device is restarted, and the components are initialized except for the recorded contents of the flash memory 4. When the above-described restart factor occurs in the device restart circuit 85 of the device abnormality detection circuit 8, any one of the power supply abnormality signal 91, the program abnormality signal 92, and the recording error signal 93 is input. Therefore, when any of the signals is input, the device restart circuit 85
The state of each signal at the time when any of the input signals is input is latched by a built-in latch circuit (not shown), and is output to the input port of the CPU 1 as status information as a PORT signal.

At the same time, a "RESET" signal is output for each component except the contents stored in the flash memory 4. This “RESET” signal is initialized for each configuration,
Thereafter, a power-up process is performed by the CPU 1. Note that, even if this reset is performed, the timer of the timer section RTC5 is continuously performed completely independently of the CPU and the like.
Then, at the time of executing the power-up process, an interrupt request is issued to the CPU 1. When there is this interrupt signal, the CPU 1 recognizes that it is a restart process, and performs a restart process different from normal to the flash memory 4 at the time of executing the normal power-up process.

As described above, when the CPU 1 has written the status information in the flash memory 4 before the restart, the restart processing is not determined based on the status signal from the device restart circuit 85, but is determined. By reading the contents of the flash memory 4, the above recognition is possible, and the configuration of the device restart circuit 85 can be simplified. In the restart processing, the recording data in the flash memory 4 is checked, the timing information stored simultaneously with the electrocardiogram information is checked, and the area of the electrocardiogram information recorded together with the time information continuous from the first time is checked. . And
Detect where the recording of ECG information has been interrupted.

Then, a certain amount of dummy data is written in order to distinguish information to be continuously recorded from the information thus far. At the same time, the status information simultaneously output when an interrupt from the device restart circuit 85 is generated is recorded together with the status at the time of the error and the data at the time of the error. Thereafter, collection and storage control of electrocardiogram information from the living body are performed.

In this case, if writing to the flash memory 4 is not possible, the RAM (or a power supply independent of the power supply circuit 9) in the timer section RTC 5 (not shown) is used to store the stored contents for a long time. The device abnormality occurrence factor and the date and time are stored in a separately provided RAM which can be held, and at the same time, the contents are alternately displayed by blinking the occurrence time and the occurrence factor on the display unit 6. This alternate blinking is, for example, for 24 hours, and thereafter, the power is turned off.

Thereafter, when the date and time of occurrence (time) and the cause of occurrence can be confirmed, for example, a specific switch (for example, “SELEC
When the power ON switch is pressed while pressing the "T" switch, the above alternate blinking is performed a certain number of times (for example, 10 times), and then the power is turned off. That is, the device does not normally automatically enter the power stage, and if the device is powered down,
This is because it can be recognized that some abnormality has occurred in the device. Then, after confirming the cause of the abnormality, a corresponding measure is taken and the device is brought into a normal state, and necessary electrocardiogram information and the like are collected and recorded.

An outline of a biological information processing apparatus which reads out the measurement information stored in the flash memory and performs the processing will be described below with reference to FIG. FIG. 3 is a block diagram showing a configuration of a biological information processing apparatus for inputting and processing electrocardiogram information from a digital Holter monitor according to an embodiment of the present invention. In FIG. 3, reference numeral 100 denotes a digital holter monitor having the configuration shown in FIG. 1 according to the embodiment of the present invention, and 200 denotes a digital holter monitor 1 of the present embodiment.
This is a biological information processing apparatus that reads a collected electrocardiogram signal and performs predetermined analysis processing and the like.

The biological information processing apparatus 200 has the following configuration. In addition, as the biological information processing apparatus 200,
Although it has a function of processing different biometric information, only the configuration of the electrocardiogram information processing part is extracted and shown in FIG. 3 for simplification of the description. That is, a control circuit 210 composed of a CPU, ROM, RAM and the like (not shown) which controls the entire apparatus, a reading circuit 220 for reading the recorded contents by mounting the flash memory card 4 of the digital holter monitor 100, a reading circuit A predetermined process is performed on the read ECG signal information from 220 to remove the influence of noise or the like to extract the ECG information, and to analyze the extracted ECG information and extract necessary characteristic waveform portions (for example, extraction of ST waveform). Control circuit 2)
10 is provided with an electrocardiogram information processing circuit 221 for outputting to the ECG 10.

Further, a device abnormality detecting circuit 222 for extracting information on abnormalities indicating a device abnormality in information read from the reading circuit 220, and electrocardiogram information from the electrocardiogram information processing circuit 221 are output from the display device 250 or the printing device 240. And an electrocardiogram information demodulation circuit 223 that demodulates the image data into a corresponding image data (demodulates the waveform image into an analog displayable waveform) and outputs the demodulated image data to the biological information output control circuit 230.

Further, in accordance with an instruction from the control circuit 210, the electrocardiogram waveform from the electrocardiogram information demodulation circuit 223 is formatted into a predetermined output format, and biological information output from a designated output device (printing device 240 or display device 250). The control circuit 230 includes a printing device 240 that prints out processed biological information, and a display device 250 that displays and outputs processed biological information and operation guidance of the device.

The biological information processing apparatus 2 according to the embodiment of the present invention
Reference numeral 00 denotes a digital Holter monitor 10 having the above configuration.
The recording information is read by the reading circuit 220 from the flash memory 4 in which the electrocardiogram information is collected and recorded by 0.
Then, the electrocardiogram information in the read information is extracted by, for example, detecting a predetermined feature point in the electrocardiogram information processing circuit. The extracted electrocardiogram information is analyzed by the electrocardiogram information processing circuit 221, and the analysis result is output to the control circuit 210. The control circuit 210 instructs the biological information output control 230 to print out or display the analysis result as needed. It should be noted that the control circuit 210 may analyze the electrocardiogram information processing circuit 221 and the device abnormality detection circuit 222 as necessary.
When a record of a device abnormality is detected, the device abnormality state is printed out together with electrocardiogram information from the printing device 240 and can be displayed on the display device 250 or the like.

In the embodiment of the present invention shown in FIG. 3, the output device for outputting the processing information is the printing device 24 connected to the biological information output control circuit 230.
0 and the display device 250 are shown, but the present invention is not limited to the above two types of devices. For example, a magnetic disk device or a magneto-optical device that stores information read by the reading circuit 220 and processing results in each circuit. When an external storage device such as a disk device or the digital Holter monitor 100 has a serial communication control unit, a device such as a communication control unit for exchanging data with the serial communication control unit is used. It is configured to be connectable.

As described above, according to the embodiment of the present invention, the digital holter electrocardiograph is provided with the device abnormality detecting circuit, and the state at the time of occurrence of the device abnormality can be recorded together with the recording of the electrocardiographic waveform. it can. For this reason, in the processing device that processes the collected electrocardiogram information, the electrocardiogram information before and after the occurrence of the device abnormality can be effectively read, and the recording of the electrocardiogram information up to that time is not wasted.

(Embodiment of the Second Invention) In the first embodiment of the present invention described above, in the digital Holter monitor, various processes when a device abnormality occurs in the hardware circuit and the CPU 1 Although the example of performing the restart has been described, the present invention is not limited to the above example,
A part of the configuration of the device abnormality detection circuit 8 may be replaced with software to simplify the hardware configuration.

That is, for example, the configurations of the recording error detection circuit 83 and the device restart circuit 85 shown in FIG. 2 can be easily replaced with software, and the second embodiment of the present invention having such a configuration is implemented. An embodiment will be described below.
Also in the embodiment of the second invention, the power supply abnormality detection circuit 81 and the watchdog timer circuit 82 are configured by hardware as separate configurations.

When the power supply abnormality detection circuit 81 detects a power supply abnormality of the apparatus, the power supply abnormality detection circuit 81
The configuration is such that an instantaneous interruption interrupt is issued to PU1. It is desirable that the instantaneous interruption interrupt be the highest priority interrupt. When this interrupt occurs, the CPU 1 interrupts all the processes currently being executed and immediately writes dummy data indicating that a device abnormality such as an instantaneous interruption has occurred in the flash memory 4, and outputs the status information of the interrupt and the current time. The clock time of the clock unit 5, that is, the time of occurrence of the device abnormality is written. After that, software reset of each component except recording data of the flash memory 4 is performed, and power-up processing described later is performed.

When the power supply voltage drops as it is, not an instantaneous interruption of the power supply, and the operation of the apparatus becomes defective, the hardware is reset so that the power-up processing is executed. If the power supply voltage becomes equal to or higher than the predetermined voltage within a predetermined time, the power-up process (restart) is performed. When the watchdog timer circuit 82 detects the timeout of the watchdog timer, it means that the program of the CPU 1 has not been executed normally, and it is not possible to judge what kind of control was performed during this time. Further, in this state, it is not possible to perform any processing in software. Therefore, in this case, software reset cannot be performed, and the program abnormality signal 92 shown in FIG. 2 in the embodiment of the first invention is output as a hardware reset signal. As a result, all hardware resets are performed. As a result, the CPU 1 performs a power-up process described later.

Further, in the case of a recording error, in this case, even if the retry is performed three times, the data cannot be written to the flash memory 4, so that the electrocardiogram information cannot be collected. Run. However,
As described above and in the embodiment of the first invention, it is not necessary to repeat the retry of the writing process to the flash memory 4 three times continuously, but to perform one writing normally. If not, a software reset may be performed on the assumption that a flash memory error has occurred, and then a power-up process may be performed. Then, the number of flash memory errors in which software processing has been performed due to an error in the flash memory 4 is stored in, for example, the RAM of the clock unit 5, and up to three times if the same processing is not performed three times. May be controlled to repeatedly perform software reset. By performing such control, each component can be reset, and if there is a defect in such a portion, there is a high possibility that the write error will be eliminated.

FIG. 4 shows details of the power-up processing described above. In the digital Holter monitor according to the second embodiment of the present invention, when the device is turned on, when a hardware reset such as detection of a timeout of a watchdog timer is performed, and when a power The power-up process shown in FIG. 4 is executed when a software reset is applied, for example, when the power is turned off or when a write error occurs in the flash memory 4.

First, in step S31, all components except for the recording data of the flash memory 4 and the content stored in the timer RTC 5 are initialized. Then, step S3
In step 2, the recording information in the flash memory 4 is checked sequentially, and the recorded contents are checked. Then, it is checked whether or not an area where the recording time continuity is lost or an area where dummy information indicating an apparatus abnormality is written is detected.
Alternatively, if the contents of the flash memory 4 have been initialized beforehand on the biological information processing device side or the like before storing the electrocardiogram information or the like, whether the contents have been initialized from the beginning,
What is necessary is just to check whether the area after the middle is the initialized area.
Then, it is determined whether or not the electrocardiogram information has been recorded in the flash memory immediately before the execution of this process, and whether or not the collected electrocardiogram information has been recorded. If the record is a new record, a collection setting such as a collection period including a time at which collection is to be started is performed in step S34, and step S3
Proceed to 6.

On the other hand, if there is information that has been partially recorded in step S33 and the recording has been interrupted due to a device abnormality, the process proceeds to step S35, and if the cause or the like has not been written, these writing processes are performed. . Then, the process proceeds to step S36. In step S36, in the case of new recording, electrocardiogram information is collected from a set period of the flash memory 4, for example, from the beginning, and the collected electrocardiogram information converted into a corresponding digital signal is sequentially stored in the flash memory 4.
The write area of the flash memory 4 is set so as to be stored in the flash memory 4. Further, when the recording is interrupted in the middle and the collection of the electrocardiogram information is resumed again, the recording of the collected electrocardiogram information is continuously performed in the previous recording area without overwriting the previously recorded content. The write area of the flash memory 4 is set as described above.

Then, in the following step S37, collection of the electrocardiogram information, conversion into a corresponding digital signal, and writing control to the flash memory 4 are performed. Then, for example, when the set time ends, the end processing of step S39 is executed. Note that this end process is also executed when the writing to the flash memory 4 is not normally performed even if the writing to the flash memory 4 is retried three times as described above.

In the end processing, in step S40, it is checked whether or not this end processing is executed due to an error in the flash memory 4. If the end process is not the end process due to a write error in the flash memory, the process is terminated, and the power is turned off in step S41 to terminate a series of electrocardiogram information collection processes. On the other hand, if an error has occurred in the flash memory 4 in step S40, the process proceeds to step S42.
To cause the RAM of the timer RTC5 to store the cause of occurrence of the device abnormality and the date and time of occurrence. RA of this clock section RTC5
The reason for causing the device abnormality and the date and time of the occurrence of the device abnormality are stored in the RAM even if the driving battery of the power supply circuit 9 of the device is exhausted and the power supply is stopped.
C5 is provided with a backup function of operation and setting contents from a built-in holding power supply (not shown), and this function is used. Therefore, if a storage unit is provided for backup, which retains the stored contents even when the power of the apparatus is turned off, the cause of occurrence of the apparatus abnormality and the date and time of occurrence may be stored therein. Subsequently, in step S43, the cause and time of occurrence of the device abnormality are blinked on the display unit 6 alternately for a set time, for example, 24 hours. Then, after the elapse of the set time, the process proceeds to step S41, and the power of the apparatus is turned off.

As a result, for example, when the electrocardiogram measurer can confirm the blinking display, it can be understood that the electrocardiogram information is not normally recorded, and the abnormal state can be resolved by asking the doctor for instructions. Becomes

[0049]

As described above, according to the present invention, even if the recording of the electrocardiogram information or the like is interrupted in the middle of the digital holter electrocardiograph, the recorded contents are prevented from being erased. It is possible to confirm the collected data without fail. In addition, the date and time of the occurrence of the abnormality, the factor, and the like are also stored, so that analysis at a later date can be performed very easily.

Further, when an abnormality occurs in the apparatus, the apparatus can be automatically restarted. Therefore, if a temporary failure factor occurs, the apparatus can be automatically restored.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a digital Holter monitor according to an embodiment of the present invention;

FIG. 2 is a diagram showing a detailed configuration of a device abnormality detection circuit shown in FIG.

FIG. 3 is a diagram showing a detailed configuration of an electrocardiogram information processing apparatus for processing recorded information from the digital Holter monitor shown in FIG. 1 according to the embodiment of the present invention.

FIG. 4 is a flowchart illustrating a device power-up process according to an example of an embodiment of the present invention;

[Explanation of symbols]

 Reference Signs List 1 CPU 2 ROM 3 RAM 4 Flash memory 5 Clock section (RTC) 6 Display section (LCD) 7 Switch circuit 8 Device abnormality detection circuit 10 Analog-digital conversion section (A / D conversion section) 11 Acceleration data detection section 12, 13 Electrocardiogram electrode 15 Respiration data detection unit 20 Serial communication control unit 81 Power supply abnormality detection circuit 83 Recording error detection circuit 85 Device restart circuit 100 Digital holter electrocardiograph 200 Biological information processing device 210 Control circuit 220 Reading circuit 221 Electrocardiogram information processing circuit 222 Device abnormality detection circuit 223 Electrocardiogram information demodulation circuit 230 Biological information output control circuit 240 Printing device 250 Display device

Claims (11)

[Claims] 1. A digital holter electrocardiograph comprising: a storage unit for storing digital information; and a recording control unit for collecting electrocardiogram information from a living body and recording the digital information in the storage unit. Determination means for determining whether or not the above is true; a restart means for restarting the apparatus when the determination means detects an abnormal operation of the apparatus; and checking the contents of the storage means when the restart means restarts the apparatus. Inspection means for inspecting a storage area before restart, and permission means for permitting the recording control means to record electrocardiogram information after storing dummy information for a predetermined time in the storage area before restart by the inspection means. And a digital Holter monitor. 2. The recording control means, if the electrocardiogram information recording is not performed normally after the permission of the electrocardiogram information recording by the permission means, repeats the electrocardiogram information recording a predetermined number of times.
2. The digital holter monitor according to claim 1, wherein when the recording of the electrocardiogram information is not normally performed even by the repetitive recording control of a predetermined number of times, the factor and the date and time are held. 3. A display means for displaying an operation state, and the display means when recording of electrocardiogram information is not normally performed even after a predetermined number of times of recording control in the storage means by the recording control means. 3. A digital Holter monitor according to claim 2, further comprising a notifying means for notifying the user of the fact. 4. The apparatus according to claim 1, wherein said determining means determines that the apparatus is abnormal when detecting an instantaneous interruption of the power supply.
A digital Holter monitor according to claim 3. 5. The digital holter monitor according to claim 1, further comprising: a program storage unit for storing a program; and an overall apparatus according to the program stored in the program storage unit. A central control means for performing control; and a watchdog timer for measuring time at regular intervals and setting the central control means. The discriminating means determines whether the central control means has an abnormality when the watchdog timer is not set for a predetermined time. A digital Holter monitor which determines that the operation of the device is abnormal. 6. The digital holter monitor according to claim 1, wherein the determination unit determines that the device is abnormal when the storage in the storage unit is not performed normally. 7. A digital biometric information recording method for a digital Holter electrocardiograph, comprising: storage means for storing digital information; and recording control means for collecting electrocardiogram information from a living body and recording the digital information in the storage means. To determine whether or not the device is operating normally, restart the device when it is determined that the device is operating abnormally, examine the contents of the storage means at the time of restart, and check the storage area before the restart. And storing the dummy information in the storage area before the restart for a predetermined time continuously, and then permitting the recording control means to record the electrocardiogram information. 8. The recording control means repeats the recording of the electrocardiogram information a predetermined number of times when the recording of the electrocardiogram information is not normally performed after the permission of the recording of the electrocardiogram information, and the recording of the electrocardiogram information is normal even by the recording of the predetermined number of times. 8. The digital biometric information recording method according to claim 7, wherein when not performed, the factor and the date and time are held. 9. The apparatus according to claim 7, wherein in determining whether or not the apparatus is operating normally, when an instantaneous interruption of power is detected, it is determined that the apparatus is operating abnormally. 2. The digital biological information recording method according to item 1. 10. The digital holter monitor according to claim 7, further comprising: a program storage unit for storing a program; and an overall apparatus according to the program stored in the program storage unit. Central control means for performing control, performing time measurement at a fixed interval, comprising a watchdog timer for performing the set by the central control means, in determining whether the device is operating normally,
A digital biometric information processing method, wherein when the watchdog timer is not set for a predetermined time, it is determined that the central control means is abnormal and operation of the apparatus is abnormal. 11. The apparatus according to claim 7, wherein in determining whether or not the apparatus is operating normally, when storage in the storage unit is not performed normally, it is determined that the apparatus is abnormal. The digital biological information processing method according to any one of the above.