Biological signal detection module and biological signal detection system

Abstract

Provided are a biological signal detection module and a biological signal detection system provided with the same. A biological signal detection module (100) is provided with a plurality of sensors (110) that detect biological signals of a subject (HM), and a support body (120) that is provided with the plurality of sensors and that is provided at a position in contact with the chest or back of the subject in an article (300) that is in contact with the upper body of the subject. The detection range of the biological signal by each of the plurality of sensors is smaller than that of the organ including the source of generation of the biological signal. As a result, the biological signal detection module can measure a biological signal in a narrow contact range in the vicinity of the source of generation of the biological signal.

Description

Technical Field

[0001] The present disclosure relates to a biological signal detection module and a biological signal detection system. Background Art

[0002] There are known techniques for detecting biological signals without attaching a sensor to a subject and without restricting the subject. Patent Document 1 describes a technique for detecting biological signals using a plurality of sensors arranged so as to traverse a living body.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: International Publication No. 2006 / 120754

[0006] Patent Document 2: Japanese Unexamined Patent Application Publication No. 2019-10436 Summary of the Invention

[0007] When the contact range of one sensor with the living body is large, the signal-to-noise (SN) ratio of the desired signal in the output signal deteriorates. Therefore, there is a need for a technique capable of measuring biological signals in a narrow contact range near the generation source of biological signals.

[0008] The present disclosure is for solving the above problems and can be implemented as the following embodiments.

[0009] According to an embodiment of the present disclosure, there is provided a biological signal detection module. The biological signal detection module includes: a plurality of sensors that detect biological signals of a subject; and a support body on which the plurality of sensors are provided and which is disposed at a position in an article that comes into contact with the upper body of the subject and that comes into contact with the chest or back of the subject; the detection range of the biological signals of each of the plurality of sensors is smaller than the organ including the generation source of the biological signals.

[0010] According to the biological signal detection module of this embodiment, biological signals can be measured in a narrow contact range near the generation source of the biological signals. Brief Description of the Drawings

[0011] Figure 1 It is a schematic diagram showing the configuration of a biological signal detection system.

[0012] Figure 2 It is an explanatory diagram showing an example of the arrangement of a plurality of sensors.

[0013] Figure 3 It is a schematic diagram showing the configuration of a biological signal acquisition device.

[0014] Figure 4 This is an explanatory diagram showing an example of the configuration of multiple sensors in the second embodiment.

[0015] Figure 5 This is a schematic diagram showing the structure of the biological signal detection system in the third embodiment.

[0016] Figure 6 This is an explanatory diagram of the biological signal detection module in the fourth embodiment.

[0017] Figure 7 This is an explanatory diagram of the biological signal detection module in the fifth embodiment.

[0018] Figure 8 This is an explanatory diagram of the biological signal detection module in other embodiments. Detailed Embodiments

[0019] A. First Embodiment

[0020] Figure 1 The biological signal detection system 10 shown detects the biological signals of the subject HM. The biological signal is a signal representing the vibration generated from the subject HM. In this embodiment, the biological signal is intermittently generated and is the heart sound of the heart HH of the subject HM, which includes the mechanical vibration or sound vibration of the heart HH, or the vibration caused by the momentum of the blood sent out by the heart HH, that is, the heart ballistic (in Japanese). The mechanical vibration or sound vibration inside the heart HH is also brought about by the opening and closing of the valves of the heart HH or the movement of the blood flowing into or out of the heart HH. The heart sound is a sound generated along with the pulsation of the heart HH and is an elastic wave propagated through a medium.

[0021] Normally, the heart sound is a periodic signal composed of the first heart sound generated by the closing of the left and right atrioventricular valves at the beginning of the ventricular contraction period and the second heart sound generated by the closing of the aortic valve and the pulmonary valve immediately after the ventricular contraction period. Generally, the first heart sound is low-pitched and long, and the second heart sound is high-pitched and short. The period from the first heart sound to the second heart sound is the contraction period of the heart HH, and the period from the second heart sound to the first heart sound of the next cycle is the diastolic period of the heart HH. The period from the first heart sound to the next first heart sound or from the second heart sound to the next second heart sound corresponds to the heart rate interval (HRI: Heart Rate Interval), and the number of the first heart sounds or the second heart sounds per minute corresponds to the heart rate.

[0022] The biological signal detection system 10 includes a biological signal detection module 100, a biological signal acquisition device 200, and a seat 300. The biological signal detection system 10 is independent of whether the subject HM is dressed or not when acquiring biological signals.Figure 1 The orthogonal x-axis, y-axis, and z-axis are shown. The x-axis is the height direction of the subject HM sitting on the seat 300 and is also the height direction of the support 120 described later. The y-axis is the width direction of the subject HM sitting on the seat 300 and is also the width direction of the support 120. The z-axis is the thickness direction of the subject HM sitting on the seat 300 and is also the thickness direction of the support 120. These axes correspond to Figure 1 the axes shown later.

[0023] The biological signal detection module 100 is disposed on the seat 300 and acquires biological signals from the back HB of the subject HM in the state of sitting on the seat 300. In the present embodiment, the biological signal detection module 100 is embedded in the recess provided in the seat 300 and fixed by frictional force or the like between the materials constituting the seat 300. In addition, the biological signal detection module 100 may not be embedded in the seat 300 and may be fixed to the surface or the back surface of the seat 300.

[0024] The biological signal detection module 100 may be integrally manufactured with the seat 300 or may be installed by being retrofitted to an article as an existing product. In the present disclosure, the term "retrofit" means that it is not installed or assembled to an article during the manufacture or installation of the article, but is installed and disposed on the article independently of the manufacture and use of the article.

[0025] In the present embodiment, the subject HM is, for example, a driver sitting on the seat 300 serving as a driver's seat. The seat 300 is an example of an article that comes into contact with the upper body of the subject HM. Examples of the "article that comes into contact with the upper body of the subject" include various articles used when a person lies down, such as bedding, a bedstead, a bed, a quilt, a lying mat, a treatment table, a hospital bed, a cushion, a pad, a floor, a sheet, a mattress, a sofa bed, and various articles used when a person sits down, such as a chair, a seat, a sofa. The "article that comes into contact with the upper body of the subject" includes not only furniture, medical instruments, etc., but also any article used when a person lies down or sits down, regardless of its use. In addition, the "article that comes into contact with the upper body of the subject" is not limited to the case of the entire article, and includes, for example, cases where a part of an article such as a backrest of a chair, a part of the backrest, or a part of a pad is included.

[0026] As Figure 2 shown, the biological signal detection module 100 of the present embodiment includes a plurality of sensors 110 and a support 120. Figure 2 It is a plan view when observing the biological signal detection module 100 along the thickness direction (z-axis direction) of the support 120.

[0027] The sensor 110 detects the biological signal of the subject HM. In the present embodiment, the sensor 110 is a piezoelectric sensor capable of outputting a vibration waveform including vibration as a biological signal. The width W1 of the sensor 110 is 4 cm. In the present embodiment, the width W1 is the length in the width direction of the support 120 and is the length of the diameter of the sensor 110. From the viewpoint of accurately detecting the vibration corresponding to the biological signal, the sensor 110 preferably has a high sensitivity capable of detecting a minute signal such as a voltage in the order of μV. In the present embodiment, the frequency band of the biological signal detected by the sensor 110 is 10 Hz or more and 100 Hz or less.

[0028] In addition, the detection range of the sensor 110 is smaller than the organ including the generation source of the biological signal. The organ including the generation source of the biological signal is an organ including a valve, tissue, and blood vessel as the generation source of the biological signal. For example, the organ including the generation source of heart sound and heart vibration is the heart HH, and the organ including the generation source of the vibration accompanying breathing is the lung. In the present embodiment, the detection range of the sensor 110 is smaller than that of the heart HH.

[0029] The biological signal detected by the sensor 110 is input as an analog voltage signal of a vibration waveform into an AD converter (not shown) or the like and converted into a digital signal, and is output to the biological signal acquisition device 200 through wired communication or wireless communication. The wireless communication can be realized, for example, by wireless connection through a wireless local area network (LAN) according to the IEEE802.11 standard, or wireless communication using Bluetooth (registered trademark).

[0030] The support 120 is a member provided with a plurality of sensors 110. The support 120 is provided at a position where it contacts the chest or back HB of the subject HM on the seat 300. In the present embodiment, the support 120 is a sheet-like member having a thickness of 1 mm. From the viewpoint of suppressing the strange feeling brought to the subject HM when the subject HM sits on the seat 300, the support 120 is formed of, for example, silicone rubber. By using a silicone rubber with a relatively thin thickness as the support 120, the support 120 deforms along the body shape of the subject HM, so that the strange feeling brought to the subject HM can be suppressed.

[0031] In the present embodiment, in the support body 120, nine sensors 110 are arranged in a grid pattern at equal intervals in the height direction (x-axis direction) and the width direction (y-axis direction) of the support body 120. The interval D1 between adjacent sensors 110 is 10 cm. This interval D1 does not have to be exact and can be regarded as being arranged at substantially equal intervals, which is caused by manufacturing inconsistencies or other inconsistencies. As a result, the interval D1 can also be equal within a range of approximately + / - 5%. Preferably, a plurality of sensors 110 are arranged at positions in the biological signal detection module 100 that face the organ containing the source of the biological signal. The length of an average adult lung is approximately 24 cm, and the width is approximately 10 cm. In addition, the length and width of an average adult heart are approximately 10 cm. Therefore, the interval D1 between adjacent sensors 110 is preferably equal to or less than the length of the organ containing the source of the biological signal, that is, 24 cm or less, and more preferably equal to or less than the width of the organ containing the source of the biological signal, that is, 10 cm or less. Thereby, the probability that each of the plurality of sensors 110 can acquire a biological signal is increased. In addition, in the present embodiment, the length of the heart HH, which is the organ containing the source of the biological signal, is the size in the length direction of the support body 120. In addition, the width of the heart HH is the size in the width direction of the support body 120.

[0032] Figure 3 The biological signal acquisition device 200 shown is a device that acquires the biological signals detected by the sensors 110. The biological signal acquisition device 200 is composed of a computer including an input / output interface 210, a storage unit 220 composed of a ROM and a RAM, and a CPU 230. The input / output interface 210, the storage unit 220, and the CPU 230 are connected in a manner that enables two-way communication.

[0033] The input / output interface 210 is connected to the biological signal detection module 100. The input / output interface 210 receives biological signals from the plurality of sensors 110 included in the biological signal detection module 100.

[0034] The CPU 230 realizes the functions of the noise perception unit 231 and the calculation unit 232 by executing a program pre-installed in the storage unit 220. However, part or all of the functions of these respective parts can also be realized by a hardware circuit.

[0035] The noise detection unit 231 detects noise in the biological signal. When the biological signal is a heart sound and heart vibration, the noise is, for example, vibrations generated from the organism such as breathing, pulse, movement of internal organs, fetal movement, and movement of the body (body movement), excluding the heart sound and heart vibration that are biological signals. The noise detection unit 231 detects, for example, an amplitude below a predetermined threshold as noise. Additionally, the noise detection unit 231 may use a learning model generated through machine learning.

[0036] The calculation unit 232 calculates the period of the biological signal. When represented in a graph with the amplitude obtained by performing wavelet transform on the biological signal as the vertical axis and time as the horizontal axis, the period of the biological signal is the period from a certain peak to the next peak. The period of the biological signal is, for example, the period from the first heart sound to the next first heart sound or the period from the second heart sound to the next second heart sound. In the present embodiment, the calculation unit 232 calculates the period of the biological signal using the biological signal with the maximum intensity among the biological signals detected by the plurality of sensors 110.

[0037] According to the biological signal detection system 10 in the first embodiment described above, the detection range of the biological signal of the sensor 110 provided in the support 120 disposed at a position in contact with the back HB of the subject HM is smaller than the heart HH including the generation source of the biological signal. Therefore, it is possible to measure the biological signal in a narrow contact range near the generation source of the biological signal. Thus, it is possible to suppress a deterioration in the SN ratio.

[0038] In addition, a plurality of sensors 110 with a width W1 of 4 cm are arranged in a grid, and the interval D1 between adjacent sensors 110 is 10 cm. More specifically, nine sensors 110 are arranged in a 24 cm square area. Since the approximately 10 cm square heart HH including the generation source of the biological signal is located within the 24 cm square area where the sensors 110 are arranged, the probability that the sensors 110 are located near the heart HH is high, and it is possible to measure the biological signal near the heart HH.

[0039] In addition, the calculation unit 232 calculates the period of the biological signal using the biological signal with the maximum intensity among the biological signals detected by the plurality of sensors 110, or the biological signal with the highest ratio relative to the noise. Therefore, it is possible to reduce the processing load in the calculation of the period of the biological signal.

[0040] B. Second Embodiment:

[0041] In Figure 4In the support body 120 of the second embodiment shown, the sensors 110 are not arranged at equal intervals, which is different from the first embodiment. Since the structure of the biological signal detection system 10 of the second embodiment is the same as the structure of the biological signal detection system 10 of the first embodiment, the description of the structure of the biological signal detection system 10 is omitted.

[0042] As Figure 4 shown, the plurality of sensors 110 are loosely arranged as they move away from a predetermined point RP. The plurality of sensors 110 are arranged in a fan shape. Preferably, the point RP is located at a position opposite to the center of the heart HH in the z-axis direction.

[0043] Depending on the physique of the subject HM, the positional relationship between the sensors 110 and the heart HH is different. According to the biological signal detection system 10 in the second embodiment described above, since the plurality of sensors 110 are loosely arranged as they move away from the point RP, in the case where the physique of the subject HM is small, the biological signals can be detected by the sensors 110 around the point RP. In addition, in the case where the volume of the heart HH is large, the biological signals can also be detected by the sensors 110 far from the point RP. Therefore, the biological signals can be detected without changing the setting position of the biological signal detection module 100 according to the subject HM.

[0044] C. Third Embodiment:

[0045] Figure 5 The biological signal detection system 10C of the third embodiment shown is different from the first embodiment in that it includes a noise sensor 400, and the other structures are the same.

[0046] The noise sensor 400 is a sensor that detects a signal representing vibration. In the present embodiment, the noise sensor 400 is the same piezoelectric sensor as the sensor 110. In the seat 300, the noise sensor 400 is provided on the opposite side of the support body 120 from the side in contact with the subject HM in the thickness direction (z-axis direction) of the support body 120. In addition, the noise sensor 400 is provided at a position opposite to the sensor 110 in the thickness direction of the support body 120. Therefore, there is a high probability that the amplitude of the biological signal detected by the noise sensor 400 is smaller at a timing later than the amplitude of the biological signal detected by the sensor 110.

[0047] In the present embodiment, when the occurrence timing of the first amplitude of the biological signal detected by the plurality of sensors 110 is later than the occurrence timing of the second amplitude corresponding to the first amplitude of the signal detected by the noise sensor 400, or when the intensity of the first amplitude is smaller than the intensity of the second amplitude, the noise sensing unit 231 senses the first amplitude as noise. Regarding the first amplitude, the noise sensing unit 231 can arbitrarily determine it.

[0048] According to the biological signal detection system 10C in the third embodiment described above, the noise sensing unit 231 senses noise using the signal detected by the noise sensor 400. Therefore, when the noise generation source is on the side opposite to the side where the seat 300 contacts the subject HM in the thickness direction of the support 120, the noise sensing unit 231 can accurately detect the noise.

[0049] D. Fourth Embodiment:

[0050] Figure 6 The biological signal detection system 10 of the fourth embodiment shown is different from the first embodiment in that the biological signal detection module 100 includes a plurality of covering portions 130, and the other structures are the same. In the present embodiment, the biological signal detection module 100 includes nine covering portions 130.

[0051] The covering portion 130 is a component that covers the portion of the sensor 110 that does not contact the support 120 without contacting the sensor 110. Each covering portion 130 is provided for each sensor 110 and covers the corresponding sensor 110 respectively. The covering portion 130 has a substantially circular shape. Preferably, the covering portion 130 has a shape similar to that of the sensor 110. In addition, in the present embodiment, the covering portion 130 is a metal component. Alternatively, resin or plastic can also be used as the covering portion 130.

[0052] According to the weight and inner diameter of the covering portion 130, the resonance frequency of the portion of the support 120 covered by the covering portion 130 is specified. For example, according to the inner diameter of the covering portion 130, the spring constant of the portion of the support 120 covered by the covering portion 130 is specified, and the resonance frequency is specified. The weight and inner diameter of the covering portion 130 can be arbitrarily specified corresponding to the desired resonance frequency. The desired resonance frequency can be specified to amplify the vibration frequency that the sensor 110 is desired to obtain. The resonance frequency can also be specified to amplify the frequency with a high probability of being a biological signal, or the resonance frequency can be specified to amplify the frequency with a low probability of being a biological signal.

[0053] In the biological signal detection system 10 according to the fourth embodiment described above, since the sensor 110 is covered by the covering portion 130, the sensor 110 can be protected. In addition, the resonance frequency of the portion of the support body 120 covered by the covering portion 130 can be controlled according to the weight of the covering portion 130 and the inner diameter of the covering portion 130.

[0054] E. Fifth Embodiment:

[0055] Figure 7 The biological signal detection system 10 of the fifth embodiment shown is different from the first embodiment in that the biological signal detection module 100 is provided with a weight 140, and the other structures are the same.

[0056] In the present embodiment, the biological signal detection module 100 is provided with a plurality of weights 140. The weights 140 are disposed on the support body 120 without contacting the sensor 110. In the present embodiment, the weights 140 are made of metal and are provided between the sensors 110. The weight of the weights 140 can be arbitrarily specified corresponding to the desired resonance frequency.

[0057] In the biological signal detection system 10 according to the fifth embodiment described above, since the weight 140 is provided on the support body 120, the resonance frequency of the support body 120 including the weight 140 can be controlled according to the weight of the weight 140.

[0058] F. Other Embodiments:

[0059] (F1) In the above embodiments, the biological signal is a heart sound or a heart vibration. However, it is not limited thereto, and the biological signal may be a vibration generated from a living body, for example, it may also be breathing or a pulse.

[0060] (F2) In the above embodiments, the sensor 110 is a piezoelectric sensor having a width W1 of 4 cm. However, it is not limited thereto, and the sensor 110 may be a piezoelectric sensor having an arbitrary width. The smaller the width of the biological signal detection module 100, the lower the probability of obtaining noise, and the more the deterioration of the SN ratio can be suppressed. However, since the detection range of the biological signal of the biological signal detection module 100 becomes smaller, there is a probability that the detection of the biological signal becomes difficult. Therefore, it is preferable to appropriately select according to the size of the organ including the generation source of the biological signal and the size of the biological signal desired to be obtained. In addition, the sensor 110 is not limited to a piezoelectric sensor, and for example, various sensors 110 capable of detecting vibration such as an accelerometer, a diaphragm, and a microphone can be used.

[0061] (F3)In the above-described embodiment, the sensor 110 is provided on an article that contacts the chest or back HB of the subject HM. In contrast, the sensor 110 may not be provided on an article that contacts the chest or back HB of the subject HM.

[0062] (F4)In the above-described embodiment, the plurality of sensors 110 are arranged in a grid pattern. However, this is not limiting, and the plurality of sensors 110 may be arranged arbitrarily. For example, the plurality of sensors 110 can be arranged in a concentric circle pattern. The plurality of sensors 110 are preferably arranged such that the direction connecting the centers of the detection ranges of any two of the plurality of sensors 110 intersects the height direction (x-axis direction) of the support 120. Thus, compared to the case where the plurality of sensors 110 are arranged only linearly so as to pass through the subject HM, the probability that the sensors 110 are arranged near the heart HH is increased. In addition, it is preferably arranged such that the direction connecting the centers of the detection ranges of any two of the plurality of sensors 110 intersects the width direction (y-axis direction) of the support 120. Thus, compared to the case where the plurality of sensors 110 are arranged only linearly so as to cross the subject HM, the probability that the sensors 110 are arranged near the heart HH is increased.

[0063] (F5)In the above-described embodiment, the band of the biological signal detected by the sensor 110 is 10 Hz or more and 100 Hz or less. However, this is not limiting, and the sensor 110 may detect a biological signal in any band. When the biological signal is respiration, the band detected by the sensor 110 is preferably 0.2 Hz or more and 0.5 Hz or less.

[0064] (F6)In the above-described embodiment, the support 120 is a sheet-like member made of silicon with a thickness of 1 mm. However, this is not limiting, and the support 120 may be a sheet-like member with any thickness. The support 120 preferably has a thickness of 0.5 mm or more and 20 mm or less. In addition, for example, the support 120 may also be a resin-made member having a concave shape that forms an internal space for accommodating the sensor 110. In this case, the support 120 accommodates a catalyst other than gas such as liquid, solid, and gel, and the sensor 110.

[0065] (F7)In the above-described embodiment, the support 120 may be provided with ventilation holes at positions where the sensor 110 is not provided. Thereby, it is possible to suppress the deterioration of the biological signal detection module 100 due to sweat, airtightness, etc. In addition, when the seat 300 blows air to the subject HM sitting on the seat 300, it is also possible to prevent the air blowing from being obstructed by the support 120.

[0066] (F8)In the above-described embodiments, the calculation unit 232 calculates the period of the biological signal using the biological signal with the maximum intensity among the biological signals detected by the plurality of sensors 110. However, this is not limitative. For example, the calculation unit 232 may also calculate the period of the biological signal using the biological signal with the highest ratio to noise among the biological signals detected by the plurality of sensors 110. In addition, the calculation unit 232 may also calculate the period of the biological signal by taking the average of the periods of the respective biological signals detected by the plurality of sensors 110.

[0067] (F9)In the above-described first, second, and fourth embodiments, the biological signal detection system 10 may not include the noise sensing unit 231. In this case, the calculation unit 232 calculates the period, for example, based on a biological signal that has been pre-generated using a filter that attenuates noise.

[0068] (F10)In the above-described third embodiment, the noise sensor 400 is disposed at a position facing the sensor 110 in the thickness direction (z-axis direction) of the support 120. However, this is not limitative. The noise sensor 400 may not be disposed at a position facing the sensor 110 in the thickness direction of the support 120. In addition, a plurality of noise sensors 400 may be provided in the plane direction of the support 120, or a plurality of noise sensors 400 may be provided in the thickness direction of the support 120.

[0069] (F11)In the above-described fourth embodiment, the biological signal detection module 100 is provided with a covering portion 130 for each sensor 110. However, this is not limitative. For example, as shown, the covering portion 130 may be provided so as to cover all the sensors 110 provided in the biological signal detection module 100. Since the area of the covering portion 130 is enlarged, the pressure applied to the covering portion 130 can be dispersed. Figure 8 As shown, the covering portion 130 is provided so as to cover all the sensors 110 provided in the biological signal detection module 100. Since the area of the covering portion 130 is enlarged, the pressure applied to the covering portion 130 can be dispersed.

[0070] (F12)In the above-described fifth embodiment, the weights 140 are provided between the sensors 110. However, this is not limitative. The weights 140 may also be provided at any part of the support 120. For example, the weights 140 may also be provided on the outer periphery of the sensors 110.

[0071] The present disclosure is not limited to the above-described embodiments, and can be implemented in various configurations without departing from the gist thereof. For example, the technical features in the embodiments corresponding to the technical features in each of the technical solutions described in the Summary of the Invention can be appropriately replaced and combined in order to solve the above problems or to achieve a part or all of the above effects. In addition, the technical features can be appropriately deleted as long as they are not described as essential features in this specification.

[0072] The biological signal acquisition device 200 and method described in the present disclosure can also be implemented by a dedicated computer provided by a processor and a memory programmed to execute one or more functions embodied by a computer program. Alternatively, the noise sensing unit 231 and the calculation unit 232 and the method described in the present disclosure can also be implemented by a dedicated computer provided by a processor constituted by one or more dedicated hardware logic circuits. Alternatively, the noise sensing unit 231 and the calculation unit 232 and the method described in the present disclosure can also be implemented by one or more dedicated computers constituted by a combination of a processor programmed to execute one or more functions and a memory and a processor constituted by one or more hardware logic circuits. In addition, the computer program can also be stored as instructions executed by a computer in a computer-readable non-removable tangible recording medium.

Claims

1. A biological signal detection module, characterized in that: It includes: A plurality of sensors for detecting the biological signals of the subject; and A support body provided with the plurality of sensors and disposed at a position in an article that contacts the upper body of the subject and contacts the chest or back of the subject; The detection range of the biological signals of each of the plurality of sensors is smaller than the organ containing the generation source of the biological signals.

2. The biological signal detection module according to claim 1, characterized in that: The plurality of sensors are configured such that the direction connecting the centers of the detection ranges of any two of the plurality of sensors intersects the height direction of the support body.

3. The biological signal detection module according to claim 1, characterized in that: The plurality of sensors are configured such that the direction connecting the centers of the detection ranges of any two of the plurality of sensors intersects the width direction of the support body.

4. The biological signal detection module according to claim 2 or 3, characterized in that: The distance between adjacent sensors among the plurality of sensors is not more than the length of the organ.

5. The biological signal detection module according to claim 4, characterized in that: The distance is not more than the width of the organ.

6. The biological signal detection module according to claim 5, characterized in that: The plurality of sensors are piezoelectric sensors with a width of 4 cm or less.

7. The biological signal detection module according to claim 2 or 3, characterized in that: The plurality of sensors are arranged at equal intervals.

8. The biological signal detection module according to claim 2 or 3, characterized in that: In the support body, the plurality of sensors are loosely arranged as they move away from a predetermined point.

9. The biological signal detection module according to claim 6, characterized in that: The thickness of the support body is 0.5 mm or more and 20 mm or less.

10. The biological signal detection module according to claim 6, characterized in that: It further includes a counterweight provided on the support body.

11. The biological signal detection module according to claim 6, characterized in that: It further includes a covering portion that covers the portions of the plurality of sensors that do not contact the support body without contacting the plurality of sensors.

12. The biological signal detection module according to any one of claims 1 to 3, characterized in that: The biological signal is heart sound or heart vibration; The frequency band of the biological signal detected by the plurality of sensors is 10 Hz or more and 100 Hz or less.

13. A biological signal detection system including the biological signal detection module according to claim 1, characterized in that: It includes: A noise sensing portion for sensing noise in the biological signal; and A noise sensor that, in the article, in the thickness direction of the support body, is disposed on the side opposite to the side where the article contacts the subject with respect to the support body to detect a signal. When the timing of occurrence of the first amplitude of the biological signal detected by the plurality of sensors described above is later than the timing of occurrence of the second amplitude corresponding to the first amplitude of the signal detected by the noise sensor, or when the intensity of the first amplitude is less than the intensity of the second amplitude, the noise sensing unit senses the first amplitude as noise.

14. A biological signal detection system, comprising the biological signal detection module according to any one of claims 1 to 3, characterized in that it comprises a calculation unit that calculates the period of the biological signal by using the biological signal with the maximum intensity or the biological signal with the highest ratio to noise among the biological signals detected by the plurality of sensors.

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