JP3419732B2 - Biological information collecting device using sealed air type sound sensor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a sound sensor attached to an air bag and uses a closed air type sound sensor for collecting biological information such as heart rate, respiratory rate, body movement including sikiki and snoring. The present invention relates to a biological information collecting device. INDUSTRIAL APPLICABILITY The present invention can provide a device that can collect biometric information accurately without attaching electrodes, lead wires, and other observation and measurement instruments to the human or animal body.

[0002]

2. Description of the Related Art A conventional device for collecting biological information such as heart rate, respiration rate, body movement, etc., has electrodes for detecting various kinds of information attached to the body of a person or an animal, and outputs signals detected by the electrodes. The one that collects the biological information of the human body by transmitting it to the measuring device via the lead wire is often used. In such a conventional device, since the electrodes for information detection are attached to the human or animal body, the position of the electrodes shifts during use and the signal changes, or the collecting lead wires cross the electrodes or the folds of the bedding. Therefore, the wire is easily broken, and if a commercial power source is used, there is a risk of electric shock if it comes into contact with a living body.
Alternatively, there are various problems that the lead wire serves as an antenna and is extremely susceptible to external electromagnetic noise.

As a method for solving the problem of the conventional biological signal detecting apparatus of this type, an apparatus described in Japanese Patent Laid-Open No. 10-14889 has been proposed. This device is based on a series connection capacitance of a first capacitance formed between a first electrode and a living body and a second capacitance formed between a second electrode and the living body. The body movement measuring means for measuring the vibration signal of the living body and the body pressure measuring means for measuring the body pressure signal accompanying the body weight of the living body by the first or second electrode and the third electrode are further provided, and the body movement measuring means is further provided. And the output of the body pressure measuring means is provided with a calculating means for calculating characteristic quantities such as body weight, heart rate, respiration rate, amount of activity, and life state of the living body without directly attaching the measuring electrode to the living body.

[0004]

The conventional biometric information collecting apparatus such as a respiration and heart rate monitor which is formed by attaching electrodes directly to a living body cannot collect accurate information for a long time. , Electrode fixing devices and lead wires impair the freedom of the body of humans and animals, and even limit rolling over. Further, the device disclosed in Japanese Patent Application Laid-Open No. 10-14889 proposed for solving these problems uses a capacitance type sensor for detecting a vibration signal of a living body, and a body pressure signal accompanying the body weight of the living body. A pressure-sensitive element is used to detect the. Generally, the capacitance type sensor has poor temperature characteristics, and the signal fluctuates in a low frequency range close to DC. Further, the pressure-sensitive sensor has creep characteristics and the like, and has a slow response speed. In other words, the measurement accuracy of absolute pressure is poor, and it is not possible to capture dynamic high-frequency signals. There is also a method of using a strain resistance element as a pressure-sensitive sensor, but the output signal greatly depends on the environment such as installation conditions and temperature. As a result, until now, the biological signal sensor, whether the user himself adjusts the zero point or the gain each time measurement starts, or whether a separate protective device is provided to stabilize the sensor installation environment,
There is a problem that it is restricted by using it only as an on / off switch.

[0005]

The present invention is made of a sheet-like air bag made of airtight flexible rubber, plastic, cloth or the like, or an airtight metal, rubber, plastic, wood or the like. A closed air sound sensor consisting of a closed cabinet with a variable internal volume, an air bag or an omnidirectional microphone or pressure sensor that detects air pressure in the closed cabinet and converts it into an electrical signal, and a closed air sound sensor. A sheet-shaped air bag or a closed cabinet with a sheet-shaped member placed on the sheet-shaped air bag or the closed cabinet with air remaining therein, and a living body of a human or animal riding on the plate-shaped member. By detecting the air pressure inside the air bladder or the closed cabinet in the above with an omnidirectional microphone or pressure sensor The problem of the conventional device is solved by realizing a biological information collecting device using a closed air type sound sensor that measures the biological information such as the number (heartbeat cycle), body movement including sikiki and snoring. . In the biological information collecting apparatus of the present invention, since the living body of a human or animal is placed on the plate-shaped member and the air pressure of the air bag or the closed cabinet is measured by the pressure sensor as the living body signal, the living body such as turning over. It is possible to detect a wide range of movements. For this reason, compared to the conventional measuring device using a capacitance type sensor or the like, the biological signal can be accurately measured over a long period of time, which is suitable for remote monitoring of inpatients and pet animals in hospitals.

[0006]

DETAILED DESCRIPTION OF THE INVENTION

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the construction of a closed air type sound sensor used in the present invention. 1A shows an example in which the sound sensor is provided inside the air bag, and FIG. 1B shows an example in which the sound sensor is provided outside the air bag. In FIG. 1A, reference numeral 1 is an air bag made of airtight flexible rubber, plastic, cloth or the like. 2 is an omnidirectional microphone or pressure sensor, and 3 is a lead wire for transmitting the signal. Air is sealed inside the air bag 1, and the omnidirectional microphone or pressure sensor 2 is mounted inside the air bag 1 and its lead wire 3 is led out of the air bag 1. Air is sealed inside the air bag 1, and the air pressure is detected by the omnidirectional microphone or the pressure sensor 2 and transmitted to the external receiving device through the lead wire 3.

In FIG. 1B, reference numeral 1 is an air bag which is made of airtight and flexible rubber, plastic, cloth or the like. Reference numerals 4 are air pipes connected to the air bag 1, respectively. 2 is an omnidirectional microphone or pressure sensor,
Reference numeral 3 is a lead wire for transmitting the signal. Air pipe 4
An omnidirectional microphone or a pressure sensor 2 is attached to each end of the. Air is sealed inside the air bag 1, and the air pressure is transmitted to the omnidirectional microphone or the pressure sensor 2 through the air pipe 4.
The omnidirectional microphone or pressure sensor 2 converts the pressure inside the air bladder 1 into an electric signal and transmits the electric signal to the receiving device through the lead wire 3.

FIG. 2 is a diagram showing an embodiment of a biological information collecting apparatus using the closed air type sound sensor of the present invention.
In FIG. 2, reference numeral 60 denotes a bet used by a person who collects biometric information. Reference numeral 10 is a closed air type sound sensor using an omnidirectional microphone or a pressure sensor having the configuration shown in FIG. 1, and 3 is a lead wire for transmitting a signal detected by the closed air type sound sensor. Reference numeral 70 denotes a plate-shaped member on which a person who collects biometric information rides. The closed air type sound sensor 10 is placed on the bed 60, and the plate-shaped member 70 is placed thereon. Closed air type sound sensor 1
The positional relationship is set so that 0 is located substantially in the center of the plate-shaped member 70.

When collecting biological information such as a patient's pulse rate and respiratory rate for remote monitoring of inpatients at a hospital or the like, it is necessary to measure the biological information for a long time. The person to be collected is measured while lying on the plate-shaped member 70 on the bed 60. As a result, in the closed air type sound sensor 10, a person who collects biological information is placed on the closed air type sound sensor 10 via the plate-shaped member 70. Therefore, as long as the person who collects the biometric information is on the plate-shaped member 70, no matter what state the person who collects the biometric information is involuntary, such as breathing or pulsation of the heart. Mechanical movements and involuntary mechanical movements of unconscious body movements such as turning over are transmitted to the air sealed inside the sealed air-type sound sensor 10 via the plate-shaped member 70, and the omnidirectional microphone is used. Alternatively, it is transmitted to a pressure sensor and converted into an electric signal. The electric signal detected by the closed air type sound sensor 10 is applied to the information processing device through the lead wire 3 to process and monitor the biological information.

FIG. 3 is a diagram showing another embodiment of the biological information collecting apparatus using the closed air type sound sensor of the present invention. In FIG. 3, 60 is a bet used by a person who collects biometric information. Reference numerals 10 and 20 denote closed air type sound sensors each having the configuration shown in FIG. 1 or 2, and 3 is a lead wire for transmitting a signal detected by the closed air type sound sensor. Reference numeral 70 denotes a plate-shaped member on which a person who collects biometric information rides. The closed air type sound sensors 10 and 20 are placed on the bed 60, and the plate-shaped member 70 is placed thereon.
Can be carried. The closed air type sound sensors 10 and 20 are placed at both ends of the plate-shaped member 70, and the closed air type sound sensor 1 is provided.
The positional relationship is set so that the plate-shaped member 70 is supported by 0 and 20. In the case of the embodiment of FIG. 3, in the closed air type sound sensor 10 for collecting biometric information, a person whose biometric information is collected via the plate-shaped member 70 rides on the closed air type sound sensors 10 and 20. Therefore, even if a person who collects biometric information while lying on the plate-shaped member 70 changes a part of his / her body by turning over, the biometric information can be collected more stably. Can be done.

FIG. 4 is a view showing still another embodiment of the biological information collecting apparatus using the closed air type sound sensor of the present invention. In FIG. 4, 60 is a bet used by a person who collects biometric information. Reference numerals 10, 20, 30, and 40 denote closed air type sound sensors each having the configuration shown in FIG. Reference numeral 3 is a lead wire for transmitting a signal detected by the closed air type sound sensor, and 4 is an air pipe. Reference numeral 70 denotes a plate-shaped member on which a person who collects biometric information rides. At the four corners of the bed 60, closed air type sound sensors 10, 20, 3
0 and 40 are placed, and the plate-shaped member 70 is placed thereon. The closed air type sound sensors 10, 20, 30, 40 are placed at the four corners of the plate-shaped member 70, and the closed air type sound sensors 10, 20, 30, 40 are set so as to support the plate shaped member 70. . In this case, when using the closed air type sound sensor shown in FIG. 1 (a) in which the sound sensor is provided inside the air bag, the air chamber of the closed air type sound sensors 10 and 30 and the closed air type sound sensor are used. Sound sensor 2
When the air chambers 0 and 40 are connected by the air pipes 4, it is also possible to commonly use the nondirectional microphones or pressure sensors for detecting the air pressure provided in the closed air type sound sensors 10 and 30. Further, the closed air type sound sensors 10, 20, 30, and 40 may be interposed in the legs of the four corners of the bed 60.

Further, when the closed air type sound sensor having the sound sensor shown in FIG. 1 (b) provided outside the air bag is used, the closed air type sound sensors 10 and 30 and the air pressure of the air chamber are changed. It is also possible to commonly use an omnidirectional microphone or pressure sensor for detection. In the case of the embodiment of FIG. 4, in the closed air type sound sensor 10 for collecting biometric information, a person whose biometric information is collected via the plate-shaped member 70 is a closed air type sound sensor 10, 20, 30, 40. The person who collects the biometric information while lying on the plate-shaped member 70 always obtains the stable biometric information even when he / she changes a part of the body by turning over. Can be collected. 2 to 4, the closed air type sound sensor is placed on the bed 60, and the plate-shaped member 70 is placed on the closed air type sound sensor. The plate-shaped member 70 placed on is not necessarily placed on the bed 60, but may be placed directly on the folding or floor.

FIG. 5 is a diagram showing still another embodiment of the biological information collecting apparatus using the closed air type sound sensor of the present invention. In FIG. 5, reference numeral 70 denotes a plate-shaped member on which a person who collects biological information rides. Reference numerals 51, 52, 53, and 54 are columns of the plate-shaped member 70, respectively. Columns 51, 52,
Reference numerals 53 and 54 are closed air type sound sensors each composed of a cushion-like bag or cabinet in which air is closed.
Each air chamber of the columns 51, 52, 53, 54 can be provided with an omnidirectional microphone or pressure sensor for detecting the air pressure of its own air chamber. In this case, it becomes possible to select and use an optimum signal from the signals of the sensors of the columns. Further, it is also possible to connect the air chambers of the columns 51, 52, 53, and 54 by air pipes to commonly use one omnidirectional microphone or pressure sensor. In the case of the embodiment of FIG. 5, the closed air type sound sensor for collecting biological information is a plate-shaped member 70.
The person who collects the biological information in the state of sleeping on the plate-shaped member 70 is turned over by the person who collects the biological information in the state of lying on the plate-shaped member 70 because the columns are supported by the columns formed of the airtight cushion-like bag and cabinet. Even when a part of the body is changed by the above, the biometric information can be collected more stably.

The biological information collecting apparatus using the closed air type sound sensor of the present invention does not limit the behavior of a person lying on the head at all, and the body including the respiration, the pulsation of the heart, the blemishes and the snoring It is suitable for remote monitoring of inpatients at hospitals, etc. because it can comprehensively capture movements as superimposed signals and perform selection and analysis of body movement time by amplitude, breathing by frequency, and selection and analysis of heartbeat. Is. In the biological information collecting apparatus of the present invention, since the living body signal of the air bag in the state where the living body of a person or an animal is placed on the plate-shaped member is adapted to measure the living body signal by the pressure sensor, external electromagnetic waves, vibration noise, etc. It becomes difficult to receive, and it becomes possible to detect the movement of the living body such as turning over in a wide range. The biological information detected by the closed air type sound sensor of the biological information collecting apparatus of the present invention includes involuntary mechanical movements such as respiration and pulsation of the heart of the human body. In addition, there are unconscious body movements such as turning over and involuntary mechanical movements, and during sleep, these unconscious body movements are important information as awakening levels. In remote monitoring of inpatients at hospitals, etc., it automatically detects that the patient has entered sleep from the state of biological information such as the patient's pulse rate and respiratory rate, and turns off the lights in the hospital room or turns off the TV. You can also adjust the radio volume.

FIG. 6 is a view showing an embodiment in which a biological information collecting apparatus using the closed air type sound sensor of the present invention is installed on the floor of a breeding box for animals such as rats. In FIG. 6, 8
0 is a breeding box in which animals such as rats whose biological information is collected are bred. 10.20.30 is a closed air type sound sensor having the configuration shown in FIG. 1 or 2. Reference numeral 70 denotes a plate-shaped member on which an animal such as a rat whose biometric information is collected rides or the floor of the breeding box itself. The closed air type sound sensors 10, 20, 30 are placed on the floor of the breeding box 80, and the plate-shaped member or the floor 70 of the breeding box itself is placed thereon. The closed air type sound sensors 10, 20, 30 are placed at three places of the plate-shaped member or the floor 70 of the breeding box, and the closed air type sound sensors 10, 20, 30 are used to make the plate-shaped member or the floor of the breeding box 70. It is set in a positional relationship that supports three points. Alternatively, legs are provided at three points below the floor 70 of the breeding box, and the legs are set so as to support the legs. For this purpose, the closed air type sound sensors 10, 20, 30 are used individually or in combination to detect the breathing of animals such as rats on the plate-shaped member or the floor 70 of the breeding box or the pulsation of the heart. It is possible to comprehensively capture body movements including the signals as superimposed signals.

For remote monitoring of animals such as rats for which biological information is collected, long-term measurement should be performed when collecting biological information such as pulse rate and respiratory rate of animals such as rats. The animal, such as a rat, for which biometric information is collected, is measured while being kept on the plate-shaped member set in the breeding box 80 or on the floor 70 of the breeding box itself. In this case, an animal such as a rat whose biological information is collected through the plate-shaped member or the floor 70 of the breeding box is placed on the closed air type sound sensors 10, 20, 30. Even when an animal such as a rat bred on the member or the floor 70 of the breeding box itself moves around in the breeding box 80 and changes its position, the biological information can be collected more reliably. Conventionally,
The only way to observe the respiration, heartbeat, etc. of an animal is to fix the animal's body completely or keep it under anesthesia so that the electrodes, sensors and lead wires are not bitten.
There was no detection method in the natural state. According to the present invention, animals can be continuously observed in their natural state, which is very effective for elucidating the pathological conditions using rats and for confirming the effects of drugs. Further, since it can be easily installed in a relatively small animal house for pets such as dogs and cats, it is possible to easily grasp the health condition of pets.

FIG. 7 shows an example of the output signal of the omnidirectional microphone of the closed air type sound sensor 10. The horizontal axis of FIG. 7 represents time (Sec) and the vertical axis represents the level (V) of the output signal. In FIG. 7, a portion in which the level of the output signal greatly changes indicates an involuntary mechanical movement BMT of unconscious body movement such as turning over of a person who collects biometric information. Further, the portion where the level of the output signal is stable and fluctuates little shows involuntary mechanical movements such as respiration of the person who collects biometric information and pulsation of the heart.

FIG. 8 shows a portion of the output signal of the omnidirectional microphone of the closed air type sound sensor 10 shown in FIG. 7 where the level is stable and fluctuates slightly (the portion circled in FIG. 7). 2) shows a signal S1 obtained by enlarging the signal of 1) and a signal S2 obtained by differentiating the signal of the same portion. The high level periodic signal of the waveform of the signal S2 obtained by differentiating the output signal of the omnidirectional microphone of the closed air type sound sensor 10 indicates the heartbeat cycle, and the high level periodic signal and the medium level periodic signal are also present. Left ventricular ejection time is shown between the signal and the signal. In this way, various biological information can be continuously obtained for a long time from the output signal of the omnidirectional microphone of the closed air type sound sensor 10.

FIG. 9 is a block diagram showing an example of a signal processing circuit for processing the output signal of the closed air type sound sensor 10 to obtain various biological information. In FIG. 9, P
T is an omnidirectional microphone of the closed air type sound sensor 10 and outputs a signal as shown in FIGS. LV is a level detection circuit, which outputs a pulse A when the omnidirectional microphone PT output exceeds a predetermined level. LP is a low-pass filter that removes high frequency components of the output signal of the omnidirectional microphone PT. DF is a differential amplifier that differentiates the output signal of the omnidirectional microphone PT, S in FIG.
The signal shown in 2 is output. DT1, DT2, DT
Reference numeral 3 denotes a maximum value detector, which outputs a positive polarity pulse each time the maximum value of a signal applied thereto is detected.

CU1, CU2, CU3 count pulses applied to them by counters and generate output signals when they reach a set value. TM1, TM2, TM3, TM4
Is a timer, which measures the time from when a signal is applied to the start terminal to when the signal is applied to the stop terminal and outputs the result to the output terminal. DV is an attenuator, which attenuates the signal t applied thereto to 1 / n and outputs it. SW1 is a switch and M1 is a memory. The output signal of the omnidirectional microphone PT is the level detection circuit L.
V, low-pass filter LP, differential amplifier DF. The pulse output from the level detection circuit LV is supplied to the timer TM1 as a start signal and added to the counter CU1.

The counter CU1 outputs a pulse of different polarity each time it receives the pulse A output from the level detection circuit LV. When receiving the first pulse from the level detection circuit LV, the counter CU1 has a negative pulse. Is a preset counter that operates so as to output a positive pulse when it receives the next pulse. The timer TM1 measures the time from the reception of the positive pulse from the level detection circuit LV to the reception of the positive pulse from the counter CN1.
The measured value is output as the body movement time BMT. The output of the low-pass filter LP is applied to the maximum value detector DT1, and the pulse output from DT1 is supplied to the timer TM2 as a start signal and also applied to the counter CU2. The timer TM2 measures the time from receiving the positive polarity pulse A from the maximum value detector DT to receiving the positive polarity pulse F from the counter CU2, and outputs the measured value as the respiratory cycle RP.

The output signal of the differential amplifier DF is connected to the maximum value detector DT2. The pulse output from the maximum value detector DT2 is supplied to the timer TM3 as a start signal and added to the counter CU3. The timer TM3 measures the time from the reception of the positive polarity pulse from the maximum value detector DT2 to the reception of the positive polarity pulse from the counter CU3, and outputs the measured value as the heartbeat cycle RR. The timer TM4 starts with the pulse output from the maximum value detector DT2, is turned on by the switch SW1 for the time of 1 / n of the heartbeat cycle RR measured by the timer TM3 and stored one heartbeat before, and the aortic valve. Only the blockage sound is detected by the maximum value detector DT3, added as a stop signal of the timer TM4, and the measured value is output as the left ventricular ejection time ET.

Next, the operation of the circuit of FIG. 9 configured as described above will be described as follows. From the omnidirectional microphone PT, as shown in S1 of FIG. 7 or FIG.
An electric signal of biometric information is output. This signal indicates involuntary mechanical movements such as respiration and heart beat of the person 70 whose biological information is collected. Level detection circuit LV
Outputs a pulse A when the electric signal output from the omnidirectional microphone PT exceeds a predetermined level, that is, when a person who collects biometric information has a body movement, and outputs this to a timer T.
Supply to M1. In response to this, the timer TM1 starts measuring the body movement time BMT. The timer TM1 receives the pulse A from the level detection circuit LV and then the counter CN1.
The time from 1 to receiving the pulse B, that is, the body movement time BMT of the person 70 who collects the biological information shown in FIG. 5, is measured and the measured value is output.

The high frequency component due to body movement in the electric signal output from the omnidirectional microphone PT is removed by the low-pass filter LP, and the maximum value, body movement due to human respiration for collecting biological information is maximum. A pulse A is output as detected by the value detector DT1. The timer TM2 receives the pulse A from the maximum value detector DT1 and then the counter CU.
The time until the pulse B is received from 2, that is, the respiratory cycle RP shown in FIG. 4, is measured, and the measured value is output. The electric signal output from the omnidirectional microphone PT is a differential amplifier D.
It is differentiated by F, converted into a signal as shown in S2 of FIG. 8, and the maximum value detector DT2 detects the maximum value.

The timer TM3 receives the pulse A from the maximum value detector DT2 and then the pulse B from the counter CU3.
Time to receive, ie, heartbeat cycle RR shown in FIG.
Is measured and the measured value is output. Also, timer TM4
Is 1 after receiving the pulse A from the maximum value detector DT2.
Switch SW for 1 / n of the heartbeat cycle RR before heartbeat
1 is ON, the time until the maximum value detector DT3 receives the pulse B, that is, the left ventricular ejection time ET shown in FIG.
Is measured and the measured value is output. In this way, various biological information can be obtained by processing the output signal of the closed air type sound sensor 10 by the signal processing circuit.

During this measurement period, the measurer only has to sleep on the bed without any restraint, and the burden is greatly reduced as compared with the conventional device. Therefore, the biological information collecting device using the closed air type sound sensor of the present invention can be used for a long time even for elderly people who have weakened physical strength, seriously sick people, and pet animals that move rapidly.

[0027]

As is apparent from the above description, the biological information collecting device using the closed air type sound sensor of the present invention is a sheet-like air made of airtight flexible rubber, plastic, cloth or the like. Bag or airtight metal, rubber, plastic, wood or other sealed cabinet with variable internal volume and air bag or omnidirectional microphone that detects air pressure in the sealed cabinet and converts it to an electrical signal or A closed air type sound sensor consisting of a pressure sensor, and a plate-shaped member placed on the sheet type air bag or closed cabinet when air remains in the sheet air bag or closed cabinet of the closed air type sound sensor. The air pressure in the air bag or closed cabinet when a human or animal living body is placed on the plate-shaped member is omnidirectional. By detecting the Rohon or pressure sensors, biological respiration, heart rate (cardiac cycle),
It is designed to measure biological information such as body movements including seki and snoring.

For this reason, in the biological information collecting apparatus of the present invention, the air pressure of the air bag or the closed cabinet in a state where the living body of a person or an animal is placed on the plate-shaped member is measured by a pressure sensor as a biological signal. As a result, it is possible to detect a wide range of movements of the living body such as rolling over, and the biological information such as breathing of the living body, heart rate (heartbeat cycle), and body movements including snoring and snoring can be freely detected by the human body. It is possible to realize a biometric information collection device that measures without damaging the biological information. The device of the present invention is useful not only for in-hospital patient monitors in hospitals and patient monitors during home treatment by using short-distance and long-distance communication means, but also as a sleep monitor for healthy people, and apnea syndrome. It can also be applied to the detection of sleep arrhythmias. It is also possible to observe changes in heart rate and respiration caused by fever such as colds and changes in female sexual cycle hormones. Furthermore, the time of sleep, the depth of sleep (REM sleep, NONR
EM sleep) can be determined, and a comfortable wake-up timing can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a closed air type sound sensor used in the present invention.

FIG. 2 is a diagram showing an embodiment of a biological information collecting apparatus using the closed air type sound sensor of the present invention.

FIG. 3 is a diagram showing another embodiment of the biological information collecting device using the closed air type sound sensor of the present invention.

FIG. 4 is a view showing still another embodiment of the biological information collecting apparatus using the closed air type sound sensor of the present invention.

FIG. 5 is a diagram showing still another embodiment of the biological information collecting apparatus using the closed air type sound sensor of the present invention.

FIG. 6 is a diagram showing an example in which the biological information collecting device using the closed air type sound sensor of the present invention is installed on the floor of a breeding box for animals such as rats.

FIG. 7 shows an example of an output signal of an omnidirectional microphone of the closed air type sound sensor 10.

8 is a signal of a portion of the output signal of the omnidirectional microphone of the closed air type sound sensor 10 shown in FIG. 7 where the level is stable and slightly fluctuates (the portion circled in FIG. 5). 2 shows a signal S1 obtained by enlarging the signal S1 and a signal S2 obtained by differentiating the signal of the same portion.

FIG. 9 is a block diagram showing an example of a signal processing circuit for processing the output signal of the closed air type sound sensor 10 to obtain various kinds of biological information.

[Explanation of symbols]

1 ... Air bag made of rubber, plastic, cloth, etc., 2 ... Omnidirectional microphone or pressure sensor, 3 ... Lead wire for sending signal, 4 ...
-Air pipe, 10, 20, 30, 40 ... Enclosed air sound sensor 6 having the configuration shown in FIG.
0 ... Bet used by people who collect biometric information,
70 ... Plate-shaped member, 51, 52, 53,
54 ... Prop of plate-shaped member 70, 80 ... Breeding box in which animals such as rats are raised, PT ... Omnidirectional microphone with closed air type sound sensor, LV ...
・ Level detection circuit, LP ・ ・ ・ Low-pass filter, DF ・ ・ ・ Differential amplifier, DT1, DT
2, D3 ..., Maximum value detector, CU1, CU2
C3 ..., Counter, TM1, TM2, TM
3, TM4 ... Timer, SW1 ... Switch, M1 ... Memory, DV ... Attenuator

Continuation of front page (56) Reference JP-A-8-103417 (JP, A) JP-A-5-192315 (JP, A) JP-A-4-28345 (JP, A) JP-A-5-212015 (JP , A) JP 10-192246 (JP, A) JP 11-19056 (JP, A) JP 11-76319 (JP, A) JP 11-342049 (JP, A) 63-143335 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 5/103-5/113

Claims (6)

(57) [Claims] 1. A sufficient amount for a person who collects biometric information to sleep
A plate-shaped member having a wide area, and below the plate-shaped member
A sheet-shaped air bag made of a flexible rubber, plastic, cloth or the like which is placed and has an area smaller than that of the plate-shaped member, or a metal, rubber, plastic having air-tightness,
And variations can be sealed cabinet interior volume made of wood or the like, more omnidirectional microphones or become more closed air Sicyon sensor and a pressure sensor for converting the electrical signals to detect the air pressure in the bladder or sealed cabinet will, by detecting by any omnidirectional microphones the air pressure in the air bag even in a state where the riding vivo of humans and animals in the position or pressure sensors on the plate-shaped member, biological respiration, heart rate ( Heartbeat cycle), a biological information collection device that uses a sealed air-type sound sensor that measures biological information such as body movements including seki and snoring. 2. Sufficient for sleeping for those who collect biometric information
A plate-shaped member having a wide area, and below the plate-shaped member
A sheet-like air bag made of a plurality of airtight flexible rubbers, plastics, cloths, etc. having a smaller area than the plate-shaped member, or made of airtight metal, rubber, plastics, wood, etc. A closed air sound sensor consisting of a closed cabinet with a variable internal volume and an omnidirectional microphone or pressure sensor that detects the air pressure in the bladder or closed cabinet and converts it into an electrical signal .
The air pressure in the air bag is detected by an omnidirectional microphone or pressure sensor regardless of the position of the living body of a person or animal on the plate-shaped member. A biological information collecting device using a closed air type sound sensor that is adapted to measure biological information such as (heartbeat cycle) and body movement including snoring and snoring. 3. A sheet-like air bag made of airtight flexible rubber, plastic, cloth or the like, or a closed cabinet having an airtight metal, rubber, plastic, wood or the like with a variable internal volume. And a closed air type sound sensor comprising an omnidirectional microphone or a pressure sensor for detecting the air pressure in an air bag or a closed cabinet and converting it into an electric signal, and the closed air type sound sensor is placed on the floor of an animal housing box. When the air remains in the sheet air bag or in the closed cabinet, the plate-shaped member placed on the sheet air bag or the closed cabinet or the bottom of the breeding box itself, and the animal rides on the plate-shaped member. Omnidirectional microphone or pressure sensor for air pressure in an air bag or a closed cabinet when the animal is in a closed or breeding box. By detecting the animal breathing, heart rate (cardiac cycle), animal living body information collecting apparatus that uses the closed air Sicyon sensor so as to measure the biological information of the body motion or the like including a cough and snoring. 4. The closed air type sound sensor according to claim 1, wherein the closed air type sound sensor having an area smaller than that of the plate shaped member is set such that its positional relationship is set substantially at the center of the plate shaped member. A biometric information collection device that uses a sensor. 5. The apparatus according to claim 2, wherein a closed air type sound sensor having an area smaller than that of the plate shaped member is placed at both ends of the plate shaped member, and the closed air type sound sensor supports the plate shaped member. A biological information collection device that uses a closed air type sound sensor set in a positional relationship. 6. The biological information according to claim 2, wherein the closed air type sound sensor having a smaller area than the plate shaped member supports the plate shaped member at four corners of the plate shaped member. Collection device.