JPH0412733A - Behavior recorder - Google Patents

Abstract

PURPOSE:To exactly and easily obtain the daily activity state of a person to be examined by detecting the posture related to the daily behavior of the person as angle information and displaying it with a vector, and in this case, displaying it with the vector by synchronizing with a living body signal related to an electrocardiogram. CONSTITUTION:Each living body signal from angle sensors 1b, 1c and 1d mounted on the breast, the thigh and the lower leg is inputted to A/D converters 4B, 4C and 4D through amplifiers 3B, 3C and 3D. A timer 7 applies an interruption to a CPU 5 at every time set in advance, reads out conversion digital data and stores it in a memory 6. Stored data is subjected to vector display by a display part 9, and also, sent out to an external processor such as a computer through an interface adaptor 8 as necessary and the same processing is executed, and the data is displayed on the display part of a CRT, etc., and analyzed. Also, an electrocardiogram waveform signal detected by an electrocardiogram measuring electrode 1a is also stored as electrocardiogram data in the same manner, and also, data corresponding to the posture is subjected to vector display on a display part 9. Accordingly, the posture of the person synchronized with the electrocardiogram waveform is displayed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to the examination of the circulatory system of a living body, particularly to data obtained during examination using a holder-type electrocardiograph (long-term electrocardiogram recording device), a blood pressure monitor, etc. The present invention relates to a behavior recording device that measures and records a subject's daily behavior or activity status, including home treatment, which is important for analysis.

[Conventional technology]

Conventionally, when conducting circulatory system tests using holder-type electrocardiographs or blood pressure monitors and analyzing the waveform data, it is necessary to understand the behavioral state of the living body (subject) in daily life, and it is necessary to conduct tests for long periods of time. It is important to understand this continuously over a period of time. For example, when observing electrocardiographic waveforms over a long period of time using a holder-type electrocardiograph, the behavioral state of the subject may be in various positions, such as sitting, standing, resting supine, exercising, or in the middle of an activity. or take a posture. Along with these various activity states of subjects, electrocardiographic waveforms and the like also vary depending on each state. For example, the heart rate during exercise is higher than at rest,
Naturally, the RR interval of the electrocardiogram becomes shorter and the electrocardiogram waveform also differs. In addition, if an arrhythmia (wave) occurs in the electrocardiogram waveform,
Diagnosis results may vary depending on the subject's behavior.

Therefore, as described above, in order to accurately analyze electrocardiographic waveforms and perform appropriate diagnosis, it is required to understand electrocardiographic waveforms that correspond to the various activity conditions of the subject.

In this type of measurement, the measurer uses photography, TV camera photography, etc. to track the subject and measure posture, etc. As an alternative to photography methods, TV camera photography, etc., we proposed a device that uses a head pressure manometer to recognize most of the postures that subjects may take during their daily activities.This device uses a tube filled with water. The tube is connected between the subject's chest and waist, and between the waist and ankles, and pressure sensors are installed at the waist and ankles of the tube to detect the difference in head pressure and detect the upper body,
This is designed to obtain posture information of the lower body.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional techniques, although measurement using the former photography method and TV camera photography method allows the subject's behavior to be measured and analyzed in detail, the measurer constantly tracks the subject. In addition, there were drawbacks such as the complexity of post-processing of the obtained data and the extremely heavy burden on the measurer for long-term measurements.Furthermore, the latter method of measurement with a device using a head pressure manometer was compared to the former method. However, the tube must be fixed from the subject's chest to the ankle, which causes restrictions and discomfort for the subject's activities.Furthermore, due to its structure, the response speed is not fast, making it difficult to measure with high precision. There was a limit to what could be done.Also, since the display method is a graph of waveforms related to posture, special knowledge is required to decipher them, and a simple display format has been desired.

On the other hand, holder-type electrocardiographs, which have traditionally been used as home medical equipment, are configured to display only electrocardiogram waveforms due to the need for miniaturization, and cannot display the subject's activity status. First, there were limitations in the results of electrocardiogram data analysis.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an action recording device that can accurately and easily obtain the daily activity status of a subject.

[Means for Solving the Problems] In order to achieve the above object, the behavior recording device of the present invention includes posture change detection means (lb) for detecting posture changes of a living body.
lc) (ld) and posture change detection means (lb) (l
c) Storage means (6) for storing the output signal of (1d) as posture data, and posture change detection means (lb) (lc).
Conversion means (5) for converting the posture data obtained from (ld) into a plurality of specific patterns corresponding to postures (6
), a display means (9) for displaying a specific pattern, and a reading means (5) for reading out the memory contents of the storage means.
(8).

Furthermore, the present invention is characterized in that it includes means (5) and (6) for converting the specific pattern into a plurality of vectors, and displays the plurality of converted vectors on a display means (9).

Furthermore, a biological signal measuring means (1a) and a posture change detecting means (
lb) (lc) (ld) and biological signal measuring means (1a
) and posture change detection means (lb) (lc) (ld)
storage means (6) for storing the output signals obtained by the above-mentioned biological signal data and the posture data, and posture data obtained from the posture changing means (lb), (lc), and (Id) into a plurality of specific patterns corresponding to postures. It comprises conversion means (5) and (6) for converting, a display section (9) for displaying biometric data and a specific pattern, and reading means (5) and (8) for reading out the contents stored in the storage means (6). be.

Further, the biological signal measuring means (1a) includes an electrocardiogram signal measuring device, and also includes converting means (5) and (6) for converting a specific pattern into a plurality of vectors, and a plurality of converted vectors (9). is characterized in that it is displayed on a display means.

[Operation] In the behavior recording device of the present invention having the above-mentioned configuration, the three posture change detection means attached to, for example, the chest, thigh, and lower leg of the subject collect angular information about postures in various behavioral states. This result is displayed as a vector and can be displayed in synchronization with biological signals such as an electrocardiogram, making it easy to analyze the subject's daily activities.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The action recording device of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a schematic configuration diagram of an embodiment. In the figure, (M) is a subject, (1a) is an electrocardiogram measurement electrode attached to the subject's body at the heart position, and (lb), (lc), and (ld) are, for example, magnetoresistive elements, etc. This ultra-compact angle sensor is attached to the subject's chest, thighs, and lower legs (ankles).

(2) is a signal processing device that captures, processes, and records biological signals; (3A) is an amplifier that amplifies electrocardiographic signals detected from electrocardiogram measurement electrodes; (3B), (3C),
(3D) are angle sensors (lb), (lc),
an amplifier (4A) that amplifies the biological signal detected by (ld);

(4B), (4C), and (4D) are amplifiers (3A), (3B), and (3C), respectively.

(5) is an analog/digital converter (hereinafter referred to as A/D converter) that quantizes the (3D) analog signal and converts it into a digital signal, and (5) analyzes and processes the captured biological signals and controls the entire device. CPU (central control unit) to perform
are shown respectively. (6) is the A/D converter (4^), (4B
), (4C), (4D) digital signal data and CPU (5) analysis (computation) results, etc. memory such as RAM, etc. (7) is the measurement of the collected biological signals Indicates a timer that sets the interval. The timer (7) interrupts the CPU (6) at every set time. Reference numeral (8) is, for example, an RS-232C interface adapter, which outputs data obtained by this processing device to an external processing device such as a personal computer. (9) is a display unit such as a liquid crystal display that displays biological signals, data, and the like.

Next, the operation of the above embodiment will be explained.

The biological signals obtained from the angle sensors (lb), (lc), and (ld) attached to each part of the subject's chest, thigh, and lower leg are sent to amplifiers (3B) and (3C).
, (3D) via A/D converter (4B) , (
4C) and (4D). A/D converter (4
B), (4C), and (4D) convert the input biological signal into a digital signal of, for example, 4 bits = 16 levels based on the bit assignment as shown in Figure 2. The angle of inclination is divided into eight levels, that is, the posture of the subject (M) is shown, and the relationship with the vector (described later) displayed on the display unit (9) corresponding to each angle is shown. .

The timer (7) interrupts the CPU (5) at preset intervals (for example, 4ms and 500m5).

The CPU (5) is triggered by an interrupt signal, for example 500m5, supplied from a timer (7) and an A/D converter (4B).

4-bit digital data is read from (4C) and (4D), respectively, and stored in a predetermined area of the memory (6). In this way, 4-bit data corresponding to the postures detected from the chest, thighs, and lower legs are sequentially stored in the memory (6) every 500 m5. The stored data is displayed as a vector on the display unit, and is also connected to an external processing device such as a computer using an interface adapter (8) if necessary.
Sent via . The external processing device performs the same processing as described above, displays the data on a display unit such as a CRT, and analyzes the data.

In addition, the electrocardiogram waveform signal detected by the electrocardiogram measurement electrode (1a) is passed through an amplifier (3A) to an A/D converter (4A).
) and is converted into a digital signal representing electrocardiogram data.

For example, the CPU (5) stores electrocardiogram data from the A/D converter (48) in the memory (6) using an interrupt signal for each DMS.
and display it on the display section (9). Also CP
U(5) analyzes the electrocardiogram data and generates the Q wave of the electrocardiogram waveform.

Detects the R wave from among the R wave and S wave, reads data corresponding to the posture of the subject (M) from the A/D converters (4B), (4C), and (4D) in synchronization with the R wave, A vector is displayed on the display section (9). Therefore, the subject's posture (forward tilt and backward tilt) is displayed in synchronization with the electrocardiogram waveform.

The aforementioned vector display will be explained with reference to FIG. The vectors in the diagram are displayed based on their correspondence to the angles shown in FIG. That is, the angle sensors (lb) and (lc) were attached to the subject's chest, thigh, and lower leg.

In (1d), the angle of the subject's standing position (standing upright) is Oo with respect to the vertical direction, the angle from 90° forward tilt to 90° backward tilt is divided into 16, and the forward and backward tilt is divided into 8 parts respectively), A/D The data of converters (4B), (4C), and (4D) are
Bit allocation is performed as shown in the figure. Subject (M)
Data on posture changes of the chest (1b), thigh (lc), and lower leg (1d) are shown in 20-a, where ■ is defined as the chest vector, ■ is the thigh vector, and ■ is the lower leg vector. and display them as three consecutive vectors. 20-b shows basic patterns showing a standing state, 20-C shows a standing state sitting on a chair, etc., 20-d shows a resting supine state, and 20-
e is an example of a vector display showing the operating state at startup.

Next, the processing operation of the embodiment shown in FIG. 1 will be explained with reference to the flowchart in FIG.

In step (Sl), the CPU (5) determines the presence or absence of an interrupt signal (for each dms) from the timer (7), returns to the start point if there is no interrupt signal (NO), and returns to the start point (YES). If there is an error signal, the process advances to step (S2). In step (S2), electrocardiogram data from the A/D converter (48) is taken in and recorded in the memory (6) in step (S3). In step (S4), the CPU (5) reads out the electrocardiogram data from the memory (6) and sends it to the display section to display the electrocardiogram waveform. In step (S5), R waves are detected from the electrocardiogram data, and if the R wave is detected (Yes), proceed to the next step (S6), and if the R wave is not detected (NO).
In this case, the process advances to step (S10). Step (S6)
Then, A/D converters (4B), (4C), (4D
), the posture data signal obtained from step (
At step 7), each posture data is stored in the memory (6). Subsequently, in step (S8), the posture data from the memory (6) is read out under the control of the CPU (5), and three types of corresponding vectors are edited. Subsequently, the information is displayed on the display unit (9) in step (S7). In step (SIO), the presence or absence of an interrupt signal (500ms) from the timer (7) is determined, and N is determined if there is no interrupt signal.

If so, return to step (Sl) and return Y
In the case of es, the attitude data of the A/D converters (4B), (4C), and (4D) are taken in in the next step (Sll), and the attitude data is stored in the memory (6) in step (S12).
). In step (S13), it is determined whether the measurement is completed or not, and if No, it is not completed, step (Sl) is performed.
Go back and repeat the following steps. Yes, it's finished
In this case, the process advances to step (S14) and it is determined whether or not there is an external output request. If there is no request (No), the process ends; if there is a request (Yes), data (electrocardiogram and posture data) is sent to the outside via the interface section (8) in step (S15).

Figure 5 shows the subject (
This is an example of vector display of the posture of M). Here, the subject (
Depending on the posture of M), it is determined how the corresponding electrocardiogram waveform changes.

FIGS. 6 and 7 are display examples of three vectors corresponding to the posture of the subject (M) displayed on the CRT screen of an external processing device, for example, a personal computer. Figure 6 shows the changes in the posture of the subject (M) over an hour at 166-second intervals, including basic postures such as standing, supine, and sitting with the upper body upright, as well as various postures such as sitting with the upper body leaning forward and sitting at ease. Displaying the status. In addition, the part surrounded by a broken line (■) in the figure is an example of the display while walking, and the trunk (chest) is upright,
It can be seen that the thighs and lower legs repeatedly tilt back and forth.

FIG. 7 shows the change in posture indicated by the broken line (■) at intervals of 0.5 seconds, and shows the process of changing the body position from a sitting position to a standing position.

In this way, the angle sensors (lb), (lc), (
In ld), the posture related to the subject's (M) daily activities is detected as angle information, and the result is displayed as a vector. In this case, since it is displayed as a vector in synchronization with the electrocardiogram-related biological signal (electrocardiogram waveform) obtained from the electrocardiogram measurement electrode (1a), the correspondence between the electrocardiogram waveform and posture in daily activities can be easily and accurately determined. Become.

In addition, although the electrocardiogram was explained as the above-mentioned biological signal,
Blood pressure, body temperature, etc. may be used, and the biological signal measuring means may be configured to correspond to blood pressure, body temperature, etc., respectively.

〔Effect of the invention〕

As explained above, according to the behavior recording device of the present invention, it is possible to accurately grasp the postural state of the subject during daily activities, and since it is displayed in vectors, it is extremely easy to interpret during analysis. Become. In addition, by displaying vectors of the subject's posture in synchronization with the electrocardiogram waveform, the correspondence between the electrocardiogram waveform and posture during daily activities can be easily determined, making it possible to accurately perform functional tests of the circulatory system. effective.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the behavior recording device of the present invention, FIG. 2 is a diagram showing display vectors corresponding to the posture of a subject, and FIG. 3 is a vector of posture data according to the embodiment. 4 is a flowchart showing the processing operation according to the embodiment, FIG. 5 is a display image of the electrocardiogram waveform and posture data on the display section of the embodiment, and FIG. 6 is a diagram for explaining the display. FIG. 7 is a diagram for explaining a display example of posture data according to the example at 166-second intervals, and FIG. 7 is a diagram for explaining a display example of posture data according to the embodiment at 0.5-second intervals. In the figure, (1a) is the electrocardiogram measurement electrode, (lb), (l
c) , (ld) is an angle sensor, (2) is a signal processing device, (48), (4B). (4C) and (4D) are A/D converters, (8) is an interface adapter, and (9) is a display section. 2O-q 20-b 0-c 0-d 0-e

Claims (1)

[Scope of Claims] 1. Posture change detection means for detecting a change in the posture of a living body; Storage means for storing an output signal of the posture change detection means as posture data; and the above posture data obtained from the posture change detection means. What is claimed is: 1. An action recording device comprising: converting means for converting the image into a plurality of specific patterns corresponding to postures; display means for displaying the specific patterns; and reading means for reading out the memory contents of the storage means. 2. The behavior recording device according to claim 1, further comprising means for converting the specific pattern into a plurality of vectors, and displaying the plurality of converted vectors on a display means. 3. A biological signal measuring means, the posture change detecting means, a storage means for storing output signals obtained by the biological signal measuring means and the posture change detecting means as biological signal data and the posture data, and the posture changing means. An action recording device comprising: a conversion means for converting the obtained posture data into a plurality of specific patterns corresponding to the posture; a display section for displaying the biological data and the specific patterns; and a reading means for reading out the memory contents of the storage means. . 4. The biosignal measuring means uses an electrocardiogram signal measuring device, and includes a converting means for converting into a plurality of vectors related to the specific pattern, and displays the converted vectors on a display means. The action recording device according to claim 3.