JPH05228121A - Human body information sensor - Google Patents

Abstract

PURPOSE:To detect and estimate a degree of strain of the human body with high sensitivity by taking notice of a variation of a heart beat, and to transmit a processing signal to an external apparatus. CONSTITUTION:A main body is constituted of a detecting means 1 for detecting a heat beat of the human body, a counting means 2 for counting the number of heart beats within a prescribed time, an arithmetic means 3 for calculating a fluctuation coefficient against the number of continuous heart beats within the prescribed time, and a transmitting means 5 for a result of operation, and an apparatus control logic circuit 4 is constituted so that it can be loaded so as to be attachable and detachable to and from the main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects the heartbeat of a human body, calculates the coefficient of variation of the heartbeat within a fixed time, transmits the calculation result to an external device, or evaluates the calculation result in a sensor. The present invention relates to a human body information sensor that estimates the degree of tension of a human body and transmits a processed signal to an external device to be controlled.

[0002]

2. Description of the Related Art Conventionally, as a means for detecting and evaluating a tension state of a human body, there is a brain wave measurement.

First, the correlation between the measurement of the electroencephalogram and the tension of the human body will be described. To measure an electroencephalogram, an electroencephalogram electrode is attached to the epidermis of the head via a gel-like paste, and a minute voltage sensed by the electrode is amplified by an amplifier and taken into a brain wave distribution processor system for signal processing. In the electroencephalogram distribution processing system, the measured electroencephalogram is divided into various frequency bands, and an intensity distribution for each frequency band within a fixed time can be obtained. From this, the frequency, which is usually called β wave, is 1
It is known that when the electroencephalogram distribution of 3 hertz or more is strongly detected, the human body is evaluated as being mentally tense or concentrated.

Regarding the tension of the human body, the heart rate within a fixed time is continuously measured, and the coefficient of variation is calculated for the heart rate within the fixed time. As a result, the human body is measured when the coefficient of variation is close to zero. It is known that the human body is nervous, and the more it is displaced from 0, the more relaxed the human body can be evaluated.

[0005]

However, in the above-mentioned EEG measurement, considering the complexity of EEG signal measurement, it is difficult to be used as a sensor for general purpose control of external devices, etc. It is also difficult to determine whether it means tension or concentration.

In view of the above problems, the present invention estimates the tension state of the human body with high accuracy by using a heartbeat that can be detected relatively easily, and further is made compact as a device,
Another object of the present invention is to provide a human body information sensor capable of transmitting a device control signal to an external device.

[0007]

In order to solve the above problems, the human body information sensor of the present invention comprises at least a detecting means for detecting the heartbeat of the human body, a counting means for counting the heartbeats within a fixed time, and a continuous means. The calculation means for calculating the coefficient of variation for the heart rate within a certain period of time and the transmission means for the calculation result are included.

Further, the present invention is characterized in that, in addition to the main body shown in the above-mentioned configuration, a logic circuit for device control detachable from the main body is further provided so as to also function as a remote controller for controlling the equipment. It is a thing.

The present invention also provides a heartbeat detecting means,
It is characterized by being equipped with a relatively compact high-sensitivity heart sound microphone or a piezoelectric pickup.

[0010]

The operation of the above configuration is as follows.

By detecting the heartbeat of the human body and calculating and evaluating the coefficient of variation with respect to the heart rate within a certain period of time, the tension state can be estimated with a higher degree of accuracy than the estimation by measuring the electroencephalogram. Is simple and can be relatively compact.

Also, by equipping the main body with a logic circuit for controlling external equipment so that the logic circuit can be rearranged according to the equipment to be transmitted, one sensor can be used to control many equipment. To serve as a sensor,
There is no need to prepare as many remote controllers as there are devices.

Further, by using a heart sound microphone or a piezoelectric pickup as the heartbeat detecting means,
Since it is possible to detect heartbeats easily and with high sensitivity, the error in the stage of raw data for calculation is small,
Therefore, the tension state of the human body can be estimated with high accuracy.

With the above-described structure, a multi-functional sensor for highly accurately estimating the tension state of the human body has been realized.

[0015]

EXAMPLES Examples of the present invention will be described below.

(Embodiment 1) First, a first embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is a human heartbeat detection means, 2 is a heartbeat rate counting means within a fixed time, 3 is a variation coefficient calculation means for the heartbeat within a fixed time, and 5 is a processed signal transmission means. The body of the human body information sensor 1 is generally 1, 2, 3, 5
Composed by. The operation of the human body information sensor 1 having the above configuration will be described. First, the heart rate detecting means is installed on a site where the heart rate of a human body can be detected, for example, on the skin surface near the neck carotid artery, and the heart rate is continuously measured at regular intervals. Next, the coefficient of variation is calculated for several heartbeats. For example, the heart rate measurement for each minute is continuously performed five times, and the heart rate for each minute is X = 58, 60, 6
If it was 2, 58, 62 (times / minute), (Equation 2)
The standard deviation becomes SD = 1.789, and the coefficient of variation is calculated as CV = 2.98 from (Equation 1). Also, after a few minutes, the heart rate measurement every minute is continuously X = 58, 5
If it is 9, 58, 58, 58 (times / minute), the standard deviation is SD = 0.160 and the coefficient of variation is CV =
Calculated as 0.27. The fact that the coefficient of variation in the latter case is closer to 0 as compared with the former case means that the human body is more tense in the latter case. That is, the calculation result is finally transmitted to an external device to be evaluated using infrared light or the like.

[0018]

[Equation 1]

CV is a coefficient of variation, SD is a standard deviation, and XB is a sample mean value.

[0020]

[Equation 2]

SD is a standard deviation, X is a sample value, XB is a sample average value, and N is a sample number. (Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, reference numeral 4 is a device control logic circuit. This example is characterized in that four device control logic circuits are attachable to and detachable from the main body configuration of the first embodiment. For example, if the control logic circuit is a control logic circuit of an air conditioner equipped with a fragrance generating device (not shown),
The coefficient of variation was calculated in the same manner as in (Example 1), and the results were evaluated over time. As a result, if the value of the coefficient of variation approaches 0, it is determined that the tension of the human body has increased in the device control logic circuit. Then, the control signal is transmitted to the air conditioner so as to discharge the fragrance having the action of relaxing the tension.

(Embodiment 3) A third embodiment of the present invention will be described below.

A heart sound microphone is connected to the heartbeat or the heartbeat, and is attached to the skin surface of a portion where the heartbeat can be confirmed as a sound, for example, a portion near the heart, the heart sound is taken in the form of voltage, and the weak voltage is applied. Amplify with an amplifier and check the heartbeat from the voltage. The subsequent operation is similar to that of the first embodiment.

(Embodiment 4) A fourth embodiment of the present invention will be described below.

By attaching a piezoelectric type pickup to the site where the heartbeat can be confirmed, for example, a band on the skin surface near the wrist or the carotid artery, the heartbeat is taken in the form of voltage, and the weak voltage from the pickup is amplified by an amplifier, Check the heartbeat from the voltage. The subsequent operation is similar to that of the first embodiment.

[0027]

As described above, according to the present invention, with respect to a heartbeat that can be detected relatively easily, a coefficient of variation is obtained with respect to a change in the heart rate within a certain period of time and evaluated over time. The degree of tension can be estimated, and by transmitting the processed signal of the coefficient of variation to the external device, the degree of tension can be controlled as necessary in cooperation with the external device. Also, by mounting the device control logic circuit detachably from the main unit, it becomes possible to apply the processing signals of the above calculation results to the control of various devices, and multiple sensors or remote controllers are prepared. There is no need to do it. Further, by adopting a heart sound microphone or a piezoelectric pickup, a more compact sensor can be easily attached to the human body.

[Brief description of drawings]

FIG. 1 is a device configuration diagram in an embodiment of the present invention.

[Explanation of symbols]

 1 Human Heartbeat Detecting Means 2 Heart Rate Counting Means within a Constant Time 3 Variability Coefficient Calculating Means for Heart Rate within a Constant Time 4 Equipment Control Logic Circuit 5 Processed Signal Transmitting Means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunitake Sakai 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. At least a detection means for detecting a heartbeat of a human body, and a counting means for counting the number of heartbeats within a fixed time,
A human body information sensor, comprising: an arithmetic means for calculating a coefficient of variation with respect to a continuous heartbeat rate within a constant time; and an arithmetic result transmitting means. 2. The human body information sensor according to claim 1, further comprising a device control logic circuit which is detachable from the sensor body. 3. The human body information sensor according to claim 2, further comprising a heart sound microphone as a human heartbeat detecting means, and an amplifying means for amplifying a signal from the microphone. 4. The human body information sensor according to claim 2, further comprising a piezoelectric type pickup as means for detecting a heartbeat of a human body, and an amplifying means for amplifying a signal from the pickup.