JPH053293B2 - - Google Patents

Description

BACKGROUND OF THE INVENTION (1) Technical Field The present invention relates to an electronic blood pressure monitor, and more particularly to an electronic blood pressure monitor that saves absolute power consumption by activating a plurality of independent circuits and peripheral devices. It is something. (2) Prior art and its problems In conventional electronic blood pressure monitors, each independent circuit and its peripheral devices are powered on before processing, and power to the peripheral devices must be powered on manually. This is troublesome, and power consumption increases by turning on power to unnecessary devices or circuits. In addition, in many of these types of devices, after the power is turned on, the microprocessor in the device itself gives instructions to start blood pressure measurement and print previously measured blood pressure values using a switch or button. After the power is turned on, the control section starts operating according to a predetermined program, but the program first performs a process of waiting until the above-mentioned instruction is given. However, although this state of "waiting for instructions" means that no processing is being performed from the human perspective, in reality, the power consumption required during the instruction waiting time cannot be ignored. This is especially true if the user forgets to give various instructions. Purpose of the Invention The present invention has been made in view of the above-mentioned prior art, and it not only supplies power to the parts necessary for blood pressure measurement processing only for the necessary period, but also provides power to the main body of the device, especially
Provides an electronic blood pressure monitor that makes it possible to minimize power consumption by supplying power to the control unit itself, including the CPU, for the minimum necessary period, and that also stores and retains past measurement results. This is what I am trying to do. Configuration of the Invention In order to achieve the above object, the electronic blood pressure monitor of the present invention has the following configuration. That is, an electronic sphygmomanometer comprising a peripheral device related to blood pressure measurement, and a control section that supplies power to the peripheral device only when the peripheral device is substantially operating and controls the operation related to blood pressure measurement, the electronic blood pressure monitor having a constant power supply. a memory that stores and stores past measurement results; a cover; a group of switches that instruct various operations that are energized when the cover is opened; and when at least one of the switches is turned on; A power supply means for supplying power to a control unit is provided, and the control unit further determines which switch in the switch group is activated when power is supplied by the power supply means. A discriminating means for discriminating, and a deenergizing means for deenergizing the power supply means after executing a process corresponding to the switch determined by the discriminating means. According to a preferred embodiment of the present invention, the peripheral devices preferably include a printer, a pressure pump, an analog circuit, and an A/D converter. According to a preferred embodiment of the present invention, the switch group preferably includes a switch that prompts the start of blood pressure measurement and a switch that prompts to print the measurement results. DETAILED DESCRIPTION AND OPERATIONS OF THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of blood pressure measurement in this embodiment. In the figure, solid lines represent power supply lines, and broken lines represent control lines, respectively. Reference numeral 1 denotes a battery that serves as a power source for each circuit and peripheral devices in this entire block diagram. 2
A is a switch that determines whether there is a cover, etc. of the electronic blood pressure monitor, and when the cover is removed, it is in the "ON" state, and the power supply stabilization circuit 7 and switch 2, which will be described later, are switched on.
Power is supplied to LCD driver 8a, LCD driver 8a, and LCD driver 8b. Also 2b, 2c
are switches for driving the printer 13 and pump 14, respectively. 3 is a CPU that controls each circuit and each peripheral device, and 4 is a ROM in which an operating program of a flowchart shown in FIG. 2, which will be described later, is stored. 5 is constantly powered and has the same function as a clock, for example every minute.
This is a real-time clock (RTC) that generates an interrupt signal to CPU3. Also 6 is switch 2
This is a gate that operates when a is “ON”.
Reference numeral 7 denotes a power stabilization circuit that supplies stable power to the CPU 3 and various peripheral devices, and is designed to supply power to the various circuits when the signal from the gate 6 is "1". Therefore, if the cover is simply removed (switches 2b and 2c are not pressed), power will not be supplied to the CPU 3 and the circuits necessary to drive the CPU 3 (for example, a clock generator (not shown), etc.). . Reference numeral 8 denotes an LCD driver and an LCD for driving a display LCD, and power is supplied to the LCD driver when the switch 2a is turned "ON", that is, when the cover is removed. Reference numeral 9 denotes a RAM for storing various measured value data, and like the above-mentioned RTC 5, power is always supplied to it and data is backed up. Reference numeral 10 denotes an A/D converter that converts Korotkoff sounds from a wrist cuff related to a blood pressure monitor, analog quantities sent from a pressure sensor, etc. into digital quantities, and outputs the digital quantities to the CPU 3. Further, 11 is an analog circuit consisting of an amplifier that amplifies the pulse sound from the arm cuff. 12a to 12d are controlled by CPU3,
This is a power supply switch that controls power supply to the printer 13, pump 14, A/D converter 10, and analog circuit 11. In addition, in this block diagram, the control lines of the RTC 5, switches 2b and 2c, and the output terminal PO of the CPU 3 are set to "ON" by the switch 2a.
Then, it is pulled up to Vdd so that it becomes a high level, that is, "1". In the case of the electronic sphygmomanometer configured as described above, there is no need to supply electrolyte to the pump 14 when the blood pressure measurement is completed and the results are printed, and conversely, when processing such as printing, the analog circuit is not required. 11
Also, there is no need to drive or operate the A/D converter 10 or the pump 14, which is a peripheral device. Considering each processing stage in this way, it can be seen that power can be supplied to necessary devices and circuits according to the stage. Table 1 provides a rough summary of these various processing steps.

[Table] In Table 1, "x" indicates a state in which power is not supplied, "△" indicates a state in which power is sometimes supplied, and "○" indicates a state in which power is always supplied. In backup mode, power is supplied to the RTC5 clock and backup RAM. At this time, the RTC 5 is configured to give an interrupt signal to the CPU 3 every minute, which is the smallest digit of the clock, and this signal is also connected to the gate 6. On the other hand, power is supplied to the RAM 9 in order to hold, ie, back up, data measured in the past. In this mode, other power supplies, such as the CPU 3, may be in the "OFF" state. Next, the time display mode will be explained. The time display mode means a state in which the cover of the electronic blood pressure monitor is removed, and at this time the time is displayed on the LCD 8b, which is the display section of the electronic blood pressure monitor. In this mode, the switch 2a in FIG. 1 is in the "ON" state, and power is first supplied to the LCD 8b, LCD driver 8a, gate 6, and switches 2b and 2c, respectively. At this time, since the output of the gate 6 is "0", no power supply voltage is output from the power supply stabilization circuit 7, and naturally the CPU 3 is not supplied with power.
However, as can be seen from this block diagram, the RTC 5 is operating at this time, and sends a negative signal with a predetermined time length every minute to the gate 6 of the CPU 3.
Output to. The output of gate 6 becomes “1” when this signal is input, and the output from power supply stabilization circuit 7 becomes “1”.
Power is supplied to the CPU 3 and the ICs, etc. that are necessary for the operation of the CPU 3 (not shown).
When the CPU 3 is powered on, while the output signal of the RTC 5 is at the "0" level, the CPU 3 immediately sets its output PO to "0" to prevent the power from being turned off, and reads the current time from the RTC 5. ,
The data is written to the LCD driver 8a, latched, and displayed on the LCD 8b. When the above processing is completed, the CPU 3 sets the output terminal PO to "1" and turns off the power of the CPU 3 itself. Also
Even when the power of CPU 3 is OFF, the LCD driver 8b
Since the data is latched, it continues to be displayed on LCD 8b. By performing this operation every minute, the CPU 3 will be powered on approximately every minute in the clock display mode, and its power consumption will be extremely small. Therefore, in this mode
CPU3 is marked “△”, RTC5 and RAM
9, the LCD 8b, the LCD driver 8a, and the power supply stabilization circuit 7 only need to be supplied with power. Next, the blood pressure measurement mode will be explained. By operating the switch 2c, power is turned on to the CPU 3 in the same way as in the clock display mode. When the power is turned on, the CPU 3 first sets the output terminal PO to "0" to prevent the power to the CPU 3 from being cut off, and performs the following processing. First, a signal is sent to the power supply switches 12b to 12d to turn on power to each of the pump 14, A/D converter 10, and analog circuit 11. Next, the systolic blood pressure value, diastolic blood pressure value, and pulse rate related to blood pressure measurement are measured respectively and the LCD driver 8a is driven.
The measurement results are displayed on the LCD 8b and stored in the RAM 9. Next, it is determined whether the switch 2c has been pressed for a predetermined period of time, and if it has not been pressed, the CPU 3
Turn off each power supply switch 12a to 12d, then set the output terminal PO to "1" to turn off the power to the CPU 3 and each peripheral circuit. In addition, in the print mode, in order to output the previously measured value data stored in the RAM 9, the currently measured blood pressure value, pulse rate, etc. to the printer, when it is detected that the switch 2b has been pressed, First, set the output terminal PO to “0” to prevent the power to the CPU3 from being cut off. Next, the power supply switch 12a is turned "ON" to turn on the power to the printer 13. Thereafter, the data stored in RAM 9 is output to the printer. The processing in each mode has been described above, and the flowchart in FIG. 2 shows this as a series of processing operations. This operation will be explained below. In the following explanation, each mode is as described above. In step S1, it is determined whether or not the electronic blood pressure monitor has a cover, and if the cover is present, the electronic blood pressure monitor operates in accordance with the backup mode described above in step S2. Also, if there is no cover, step
At S3, a signal generated every minute from the RTC 5 enters the time display mode and causes the LCD 8b to display the time. At this time, it is determined whether the switch 2b is "ON" or not (step S4). If it is "ON", the process moves to step S5 and enters the print mode, where the previous measurement data is read from the RAM 9 and output to the printer 13. Next, in step S6, it is determined whether switch 2c is "ON" or not, and it is turned "OFF".
When , the process returns to step S1. When the switch 2c is "ON", the process moves to step S7 and enters the blood pressure measurement mode, where the systolic blood pressure, diastolic blood pressure, pulse rate, etc. are measured, and the measured data is displayed on the LCD 8b via the LCD driver 8a, together with the time. Store it in RAM9 (step S8).
Next, in step S9, the state of switch 2c is detected, and if it is "ON", the subsequent processing is executed again in step S7, and if it is "OFF", the state of switch 2c is
In S10, the state of switch 2b is detected. When the switch 2b is "ON", the measurement data measured in step S7 is output to the printer 13, and when it is "OFF", the operation of detecting the states of the switches 2b and 2c is repeated for a predetermined period of time in step S12. , 2c are "OFF", the process returns to step S1. As described above, according to this embodiment, in each process, by powering on only the necessary circuits and their peripheral devices, it is possible to extend the life of the battery. In particular, in clock mode, the CPU
When the power is turned on, the CPU's drive rate with respect to time becomes extremely low. Furthermore, power is automatically supplied to each peripheral device, which has the effect of saving time and effort. Further, in this embodiment, an example in which a battery is used as a power source has been described, but the present invention is not limited to this. For example, when applied to a household AC power source, the power consumption can be extremely reduced. Further, in this embodiment, an example in which the present invention is applied to an electronic blood pressure monitor has been described, but the present invention is not limited to this. Further, according to this embodiment, power is supplied to the CPU 3 etc. only after a blood pressure measurement instruction or a print instruction is given, so there is no program loop waiting for an instruction and a waiting state, thereby reducing wasted power. It becomes possible to reduce consumption. Furthermore, when various processes are completed, the CPU 3 automatically cuts off power not only to peripheral devices but also to itself, making it possible to suppress power consumption as much as possible. However, it retains the results measured in the past.
RAM is always backed up regardless of whether the cover is opened or closed, so its contents will not be accidentally erased. Additionally, power is automatically supplied to peripheral devices, which saves time and effort. Effects of the Invention As explained above, according to the present invention, not only power is supplied to important points necessary for blood pressure measurement processing only for a necessary period, but also power is supplied to the main body of the device, especially the control unit itself including the CPU. By supplying power for the minimum necessary period, it is possible to suppress power consumption as much as possible, and it is also possible to memorize and hold measurement results measured in the past.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic blood pressure monitor according to this embodiment, and FIG. 2 is an operational flowchart according to this embodiment. In the figure, 1...Battery, 2a-2c...Switch,
3...CPU, 4...ROM, 5...RTC, 6...
Gate, 7...Power stabilization circuit, 8a...LCD
Driver, 8b...LCD, 9...RAM, 10...
...A/D converter, 11...Analog circuit, 12a
~12d...power supply switch, 13...printer, 14...pump.

Claims (1)

[Scope of Claims] 1. An electronic blood pressure monitor comprising: a peripheral device related to blood pressure measurement; and a control section that supplies power to the peripheral device only when the peripheral device substantially operates, and controls the operation related to blood pressure measurement. a memory that is constantly supplied with power and stores past measurement results; a cover; a group of switches that instruct various operations that are energized when the cover is opened; and at least one of the switch groups. power supply means for supplying power to the control section when the switch is turned on; An electronic device comprising: a discriminating means for discriminating whether the switch has been activated; and a deenergizing means for deenergizing the power supply means after executing a process corresponding to the switch determined by the discriminating means. Sphygmomanometer. 2. The electronic blood pressure monitor according to claim 1, wherein the peripheral device includes a printer, a pressure pump, an analog circuit, and an A/D converter. 3. The electronic blood pressure monitor according to claim 1, wherein the switch group includes a switch that prompts to start blood pressure measurement and a switch that prompts to print the measurement results.