JPH0428345A - Living body monitoring device - Google Patents

Abstract

PURPOSE:To monitor a variety of body movements of a number of persons concentrically in lump at a low cost at a same time by connecting a plurality of beds having the bed equipped with a filter circuit, amplifying circuit, counting circuit, and a piezoelectric element with a display means and displaying the output signal of each counting circuit. CONSTITUTION:When the piezoelectric element 11 arranged on each of a plurality of beds 12 is deformed by the body movement such as the heart beat, aspiration, and turning-over in bed of a user on a bed, a voltage due to the piezoelectric effect is generated from the piezoelectric element 11. Only the prescribed frequency component among the generated voltage output passes through a filter circuit 12, and amplified by an amplifying circuit 13, and the number of heart beats, aspiration frequency, and the body movement such as turning- over in bed are counted by a counting circuit 14. The counting data of each user is transmitted to a display means 18 through a communication cable 16, and displayed on a display 17 in lump. Accordingly, the body movements such as the number of heart beats, aspiration frequency and the turning-over in bed of a number of persons can be monitored concentrically in lump at a low cost for the actual use.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a biological monitoring device that centrally monitors the heart rate, respiratory rate, and body movements of many people, such as turning over in bed, at the same time. It is used for the treatment of patients in such facilities and local home health care agencies. In addition, it is used in general households for daily health management of family members.

BACKGROUND OF THE INVENTION A conventional biological monitoring device of this type will be explained with reference to FIGS. 3 and 4. Note that FIG. 4 shows a cross-sectional view taken along line AA of the 33rd (-) diagram. This biological monitoring device is equipped with a plurality of beds 8 as shown in the figure.
Each bed has two metal plates or metal mesh antenna members 2a, 2b attached to both sides of an insulating plate 1, and insulating materials 3a, 3b having different insulation constants on top of the antenna members 2a, 2b.
A recording mat 5 formed by overlapping the active layers 3 formed by the above and further covering them with a flexible shield 4 is placed under the pine tress 6, and the antenna member 2
It had an amplifier 7 for amplifying the output signals from a and 2b. The amplifier 7 of each bed is connected to the central recording device 9.
was connected to. (For example, JP-A-55-16053
(No. 9 Publication) With the above configuration, when a change in electrostatic charge occurs on clothing, bedding, or the pinerest 6 due to the heartbeat, breathing, and body movements such as turning over of the user sleeping on each bed 8, the resulting potential difference is reduced. was amplified by an amplifier 7 in each bed 8, and the output from each amplifier 7 was recorded all at once by a central recording device 9.

Problems to be Solved by the Invention However, with the above structure, the structure of the recording mat 5 is complicated as described above, and the manufacturing cost is high, and the recording mat 5 itself has no moisture permeability or moisture absorption, so This poses a practical problem in that when used, moisture accumulates in the pinerest 6 and the like, making the user uncomfortable.

The present invention has been made to solve these conventional problems, and an object of the present invention is to provide a practical biological monitoring device that is inexpensive and can simultaneously centrally monitor the heart rate, respiratory rate, and body movements of many people, such as turning over in bed. shall be.

Means for Solving the Problems In order to solve the above problems, the biological monitoring device of the present invention includes:
A flexible piezoelectric element disposed in bedding such as futons, sheets, pinerests, etc., a filter circuit that passes only a predetermined frequency component of the output signal of the piezoelectric element, and amplification of the output signal of the filter circuit. a plurality of beds, each bed comprising an amplifier circuit for counting an output signal of the amplifier circuit, a counting circuit for counting output signals of the amplifier circuit, the filter circuit 5 cage, the amplifier circuit, the counting circuit, and bedding provided with the piezoelectric element. and display means for displaying the output signals of each of the counting circuits via communication means.

Operation The present invention operates as follows with the above configuration. That is, when the piezoelectric elements disposed in each of the plurality of beds are deformed by the heartbeat, breathing, and body movements of the user of the bedding, such as turning over, a voltage is generated from the piezoelectric elements due to the piezoelectric effect. Then, only a predetermined frequency component of the generated voltage output is passed through a filter circuit, amplified by an amplifier circuit, and then heart rate, breathing rate, and body movements such as turning over in bed are counted by a counting circuit. The counting data of each user is transmitted to the display means via the communication means and displayed all at once on a display or the like.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

This embodiment consists of a plurality of beds, and FIG. 1 is a perspective view of a typical bed 10, and FIG. 2 is a block diagram of the same embodiment.

In FIGS. 1 and 2, 11 is a flexible piezoelectric element, and here, a polymeric piezoelectric material such as polyvinylidene fluoride (PVDF) is made into a thin film and flexible electrode films are attached to both sides. It is made by molding a material into a tape shape, and the manufacturing cost is relatively low and it can be produced in large quantities. Piezoelectric element 1
1 is fixed to the surface of the pinerest 6. 12 is a filter circuit that passes only a predetermined frequency component of the output signal of the piezoelectric element 11, and 18 is composed of a Tiebishiev circuit or the like.
1 is an amplifier circuit that amplifies the output signal of the filter circuit 12;
4 is a counting circuit that counts the output signal of the amplifier circuit 13; 15;
is a circuit unit having a filter circuit 12, an amplifier circuit 13, and a counting circuit 14. Counting circuit 14- of bed 10
is in communication with display means 18 having a display 17 via a communication cable 16.

In the above configuration, when the piezoelectric element 11 in each bed 10 is deformed by the heartbeat, breathing, and body movements of the user on the mattress, such as turning over, a voltage is generated from the piezoelectric element 7 and the bellows 11 due to the piezoelectric effect. Then, only a predetermined frequency component of the generated voltage output is passed through the filter circuit 12, amplified by the amplifier circuit 13, and then the counting circuit 14 counts the heart rate, breathing rate, and body movements such as turning over in bed. Each data counted by the counting circuit 14 of each bed is transmitted to the display means 18 via the communication cable 16, and each data is displayed on the display 17. Here, when counting the heart rate, set the band of the filter circuit 12 to about 0.7 to about 2 Hz, and when counting the breathing rate, set the band to about 0.1 to about Q, 5 Hz, and count body movements such as turning over in bed. In this case, the frequency may be about 1 to about IQHz.

Due to the above-mentioned action, the piezoelectric element 11 installed in each bed to detect body movements such as heartbeat, breathing, and turning over in bed does not have a complicated structure like the conventional recording mat 5 and has a small shape, so it is cheaper than the conventional one. In addition to being inexpensive to manufacture, it can be easily attached to any bed and simultaneously monitor the heart rate, breathing rate, and body movements of many people, such as turning over in bed.

In addition, even if the piezoelectric element 11 is placed in the bedding, the moisture permeability and absorbency of the bedding will not be impaired, so if it is used continuously as in the past, moisture will accumulate in the pine mattress, making it uncomfortable. Nor.

As described above, the biological monitoring device described above makes it possible to centrally monitor the heart rate, breathing rate, and body movements of many people at the same time, such as turning over in bed, at a low cost and in a practical manner. In addition to being useful for diagnosis, treatment, prevention, emergency treatment, etc. at medical facilities such as the United States, it can also be useful for home medical care and health management at home, work, etc., which will become increasingly necessary in the future. In particular, in medical facilities such as hospitals, the accumulation of fatigue among nurses due to shift braking has been a problem, but the above-mentioned biological monitoring device makes it possible to reduce daily work and has the effect of alleviating the accumulation of fatigue. There is.

In the second embodiment, each counting circuit 14 and the display means 18 are connected by the communication cable 16, but in the second embodiment of the present invention, the circuit unit 15 has a transmitter, and the display means 1
8 may have a receiving section, and each counting circuit 4 and the display means 18 may communicate wirelessly, which eliminates the trouble of laying the communication cable 16 and also allows the bed 10 to Bed 10 when moving
This has the effect of allowing you to move freely.

Further, as a third embodiment of the present invention, each counting circuit 1
The circuit unit 15 and the display means 18 may each have a modem so as to transmit the output signal of the output signal 4- to the display means 18 via a telephone line, which has the effect that it can be used as a home medical care system.

As a fourth embodiment of the present invention, the display means 18 may have a storage section that stores the output signals of each counting circuit 14, and display the data stored in the storage section, so that each user can It has the effect of being able to utilize time-series data from an individual's past to the present for medical diagnosis, treatment, disease prevention, etc. In addition, it is said that body movements during sleep are correlated with the sleeper's level of sleep, so body movements during sleep are counted,
If you remember, when you wake up and display your body movements throughout the night, it will be 10 (
- It has the effect of being able to diagnose your sleep and check your health.

As a fifth embodiment of the present invention, the display means 18 has an alarm generator that issues an audio and display alarm when the output signal of each counting circuit 14 deviates from a certain predetermined range. It may also be configured as a medical device, and is useful for emergency medical care, such as enabling quick response when a user suddenly falls ill. In particular, it can be used to detect and prevent sleep apnea and heart failure when the user is unconscious, infant suffocation, sudden infant death syndrome, etc.

Effects of the Invention As described above, according to the biological monitoring device of the present invention, it is possible to centrally monitor the heart rate, respiratory rate, and body movements such as turning over of many people at the same time at a low cost and in a practical manner. Therefore, diagnosis, treatment, prevention,
In addition to being useful for emergency treatment, it can also be useful for home medical care and health management at home, work, etc., which will become increasingly necessary in the future. In particular, in medical facilities such as hospitals, the accumulation of fatigue among nurses due to the 11-brake braking muscles has been a problem, but the above-mentioned biological monitoring device makes it possible to reduce daily work and alleviate the accumulation of fatigue. It has the effect of being

[Brief explanation of drawings]

FIG. 1 is a perspective view of a bed of a biological monitoring device according to an embodiment of the present invention, FIG. 2 is a block diagram of the same device, FIG. 3 is a sectional view of a conventional biological monitoring device, and FIG. 4 is a diagram similar to that of FIG. It is a sectional view taken along the line AA. DESCRIPTION OF SYMBOLS 10... Bed, 11... Piezoelectric element, 12... Filter circuit, 13... Amplifier, 14... Counting circuit,
15...Circuit unit, 16...Communication cable,
18...Display means.

Claims (5)

[Claims] (1) A flexible piezoelectric element disposed in bedding such as futons, sheets, and mattresses, a filter circuit that passes only a predetermined frequency component of the output signal of the piezoelectric element, and an output of the filter circuit. a plurality of beds each comprising an amplifier circuit that amplifies a signal, a counting circuit that counts the output signal of the amplifier circuit, and bedding provided with the filter circuit, the amplifier circuit, the counting circuit, and the piezoelectric element; ,
A biological monitoring device comprising display means for displaying output signals of each of the counting circuits via communication means. (2) The biological monitoring device according to claim 1, wherein the communication means wirelessly transmits the output signal of each counting circuit to the display means. (3) The biological monitoring device according to claim 1, wherein the communication means transmits the output signal of each counting circuit to the display means via a telephone line. (4) The biological monitoring device according to claim 1, 2 or 3, wherein the display means has a storage section that stores the output signal of each counting circuit, and displays the data stored in the storage section. (5) The biological monitoring device according to claim 1, 2 or 3, wherein the display means has an alarm generating section that issues an alarm when the output signal of each counting circuit deviates from a predetermined range.