JP2017189326A - Living body monitoring sensor and method for installing living body monitoring sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a living body monitoring sensor which reduces noise to improve detection accuracy of biological vibration.SOLUTION: The sensor comprises: a vibration transmission plate 11 which transmits human biological vibration; and a biological vibration detection part 12 which is laminated on a main surface 11a of the vibration transmission plate 11 and detects the biological vibration transmitted from the vibration transmission plate 11. The shape of the biological vibration detection part 12 in a view from the laminating direction of the vibration transmission plate 11 is a rectangle, and the length in the longitudinal direction of the biological vibration detection part 12 is 20 mm to 500 mm, and the length in the shorter direction of the biological vibration detection part 12 is 3 mm to 20 mm.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a biological monitoring sensor and a method for installing the biological monitoring sensor.

  Biological monitoring sensors for detecting human biological vibration have been put into practical use in the medical field and the like. Human biological vibrations detected by the biological monitoring sensor are converted into electrical signals. By sampling an electrical signal related to biological vibration at a predetermined cycle (frequency), biological data such as a person's heartbeat and respiration is generated from the electrical signal.

  For example, Patent Literature 1 discloses a human absence detection method and a human absence detection device using vibration sensor means. The vibration sensor means detects a vibration signal from the vibration of the body emitted by a person in a predetermined place, performs a filtering process on the vibration signal due to the vibration, and if the detected vibration signal exceeds a predetermined existence duration, It is described that it exists in a predetermined place, and that when a state without a vibration signal exceeds a predetermined absence duration, it is determined that a person is absent in the predetermined place.

JP 2013-210367 A

  However, in the conventional biological monitoring sensors, the detected biological vibration includes a large noise, and the detection accuracy of the biological vibration may be lowered.

  Accordingly, an object of the present invention is to provide a biological monitoring sensor that reduces noise and improves the detection accuracy of biological vibration.

  Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.

  A biological monitoring sensor according to a representative embodiment of the present invention includes a vibration transmission plate that transmits a human biological vibration, and a biological body that is laminated on the main surface of the vibration transmission plate and detects a biological vibration transmitted from the vibration transmission plate. A vibration detection unit, the shape of the biological vibration detection unit is rectangular when viewed from the stacking direction of the vibration transmission plate, the length of the biological vibration detection unit in the longitudinal direction is 20 mm to 500 mm, and the length of the biological vibration detection unit in the short direction. Is 3 mm to 20 mm.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  That is, according to a typical embodiment of the present invention, it is possible to provide a biological monitoring sensor that reduces noise and improves the detection accuracy of biological vibration.

It is a figure which shows an example of a structure of the biological monitoring system which concerns on Embodiment 1. FIG. (A), (b) is a figure which shows an example of the sensor for biological monitoring which concerns on Embodiment 1. FIG. (A), (b) is a figure which shows an example of the installation method of the sensor for biological monitoring which concerns on Embodiment 1. FIG. (A), (b) is a figure which shows an example of a structure of the sensor for biological monitoring which concerns on Embodiment 2. FIG. (A), (b) is a figure which shows an example of the other structure of the sensor for biological monitoring which concerns on Embodiment 2. FIG. (A), (b) is a figure which shows an example of the sensor installation method for biological monitoring which concerns on Embodiment 3. FIG. (A)-(c) is a figure which shows an example of the installation method of the sensor for biological monitoring which concerns on Embodiment 4. FIG. (A)-(c) is a figure which shows an example of the installation method of the sensor for biological monitoring which concerns on Embodiment 5. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description thereof is omitted. Further, even a plan view may be hatched for easy understanding of the drawing.

  Further, in the following embodiment, when it is necessary for the sake of convenience, the description will be divided into a plurality of sections or embodiments, but they are not irrelevant to each other unless otherwise specified. The other part or all of the modifications, details, supplementary explanations, and the like are related.

  Also, in the following embodiments, when referring to the number of elements (including the number, numerical value, quantity, range, etc.), particularly when clearly indicated and when clearly limited to a specific number in principle, etc. Except, it is not limited to the specific number, and it may be more or less than the specific number.

  Further, in the following embodiments, the constituent elements (including element steps) are not necessarily indispensable unless otherwise specified and clearly considered essential in principle. Needless to say.

  Further, in the following embodiments, regarding constituent elements and the like, when “consisting of A”, “consisting of A”, “having A”, and “including A” are specifically indicated that only those elements are included. It goes without saying that other elements are not excluded except in the case of such cases. Similarly, in the following embodiments, when referring to the shapes, positional relationships, etc. of the components, etc., the shapes are substantially the same unless otherwise specified, or otherwise apparent in principle. And the like are included. The same applies to the above numerical values and ranges.

(Embodiment 1)
FIG. 1 is a diagram illustrating an example of a configuration of a biological monitoring system according to the first embodiment. 2A and 2B are diagrams illustrating an example of a biological monitoring sensor according to Embodiment 1, in which FIG. 2A is a plan view and FIG. 2B is a cross-sectional view. FIG. 3 is a diagram illustrating an example of an installation method of the biological monitoring sensor according to the first embodiment. FIG. 3A illustrates a case where the sensor is installed between the bed mat and the bed mat support portion. b) is a case where it is installed on the upper surface of the bed mat.

  As shown in FIG. 1, the biological monitoring system 1 includes a biological monitoring sensor 10, a biological vibration data acquisition unit 20, a biological data monitoring unit 30, and the like. The biological monitoring system 1 detects the biological vibration of the subject (person) in the biological monitoring sensor 10, generates biological data of the subject from the detected biological vibration in the biological vibration data acquisition unit 20, and the biological data monitoring unit 30. The health status of the subject is monitored based on the biometric data. The living body monitoring system 1 is used, for example, in a nurse call system in a medical institution, a remote medical system connecting a medical institution and a remote place, a care system connecting a home of a care recipient and a care provider, a medical institution, and the like. The

  The biological monitoring sensor 10 includes a vibration transmission plate 11 and a biological vibration detector 12 as shown in FIGS. 2 (a) and 2 (b). As shown in FIG. 2B, the biological monitoring sensor 10 has a configuration in which a biological vibration detection unit 12 is stacked on the main surface 11 a of the vibration transmission plate 11. The biological monitoring sensor 10 detects the biological vibration of the subject (person) and outputs the detected biological vibration to the biological vibration data acquisition unit 20. Specifically, the biological vibration of the subject is transmitted to the biological vibration detection unit 12 by the vibration transmission plate 11, the transmitted biological vibration is detected by the biological vibration detection unit 12, and the detected biological vibration is detected by the biological vibration data acquisition unit. 20 is output.

  The biological monitoring sensor 10 is installed on a bed 100 used by a subject, for example, as shown in FIG. Specifically, when the biological monitoring sensor 10 is installed on the bed 100, it is installed between the bed mat 110 and the bed mat support portion 101 that supports the bed mat 110. Alternatively, the biological monitoring sensor 10 may be installed on the upper surface 110a of the bed mat 110, for example, as shown in FIG.

  The vibration transmission plate 11 is made of, for example, a resin such as polypropylene (PP), polyethylene terephthalate (PET), polyoxymethylene, polyacetal (POM), or polyacetal.

  The shape of the vibration transmission plate 11 can be arbitrarily changed according to the place where the biological monitoring sensor 10 is installed. Specifically, when the vibration transmission plate 11 is installed on the bed 100 shown in FIG. 3, the shape of the vibration transmission plate 11 may be, for example, rectangular. In this case, the length of the vibration transmission plate 11 in the longitudinal direction is about 600 mm to 900 mm, and may be about the same as the length of the bed 100 in the width direction, for example. In this case, the length of the vibration transmission plate 11 in the short direction is 20 mm to 100 mm. The thickness of the vibration transmission plate 11 is preferably 0.5 mm to 5 mm, for example. This is because if the thickness of the vibration transmission plate 11 is thinner than 0.5 mm, the durability of the vibration transmission plate 11 is lowered. Moreover, if the thickness of the vibration transmission plate 11 is thicker than 5 mm, the vibration transmission plate 11 becomes difficult to transmit the biological vibration to the biological vibration detection unit 12.

  The biological vibration detection unit 12 includes, for example, a piezoelectric transducer that converts biological vibration into an electrical signal. The piezoelectric transducer constituting the biological vibration detector 12 is made of, for example, a resin having ferroelectricity. Examples of the resin having ferroelectricity used for the biological vibration detection unit 12 include polyvinylidene fluoride (PVDF). The biological vibration detection unit 12 detects the biological vibration transmitted from the vibration transmission unit 11 and converts the biological vibration into an electrical signal such as a voltage. The biological vibration detection unit 12 outputs the biological vibration converted into the electrical signal to the biological vibration data acquisition unit 20 as biological vibration data. The biological vibration detection unit 12 may be disposed at an arbitrary position on the main surface 11a of the vibration transmission plate 11.

  The shape of the biological vibration detection unit 12 in the stacking direction of the vibration transmission plates 11, that is, the normal direction of the main surface 11a of the vibration transmission plate 11, is, for example, a rectangle. In this case, for example, the biological vibration detection unit 12 has the longitudinal direction of the biological vibration detection unit 12 along the longitudinal direction of the vibration transmission plate 11 and the short direction of the biological vibration detection unit 12 is the short side of the vibration transmission plate 11. It arrange | positions at the main surface 11a of the vibration transmission board 11 so that a direction may be followed.

  In this case, the length of the biological vibration detection unit 12 in the longitudinal direction is, for example, 20 mm to 500 mm. In this case, the length of the biological vibration detection unit 12 in the short direction is 3 mm to 20 mm. The length of the biological vibration detector 12 is defined in this way for the following reason. When the length in the longitudinal direction of the biological vibration detection unit 12 is less than 20 mm and the length in the short direction is less than 3 mm, the biological vibration detection unit 12 is too small and the detection capability of biological vibration is insufficient. It is. In addition, when the length in the longitudinal direction of the biological vibration detection unit 12 exceeds 500 mm and the length in the short direction exceeds 20 mm, the biological vibration detection unit 12 is too large and easily affected by external vibration. This is because the detected biological vibration may include large noise. Therefore, if the area of the biological vibration detection unit 12 is large, distortion of the vibration transmission plate 11 occurs even with small noise, and thus a lot of noise is picked up. Further, when the area of the biological vibration detection unit 12 is small, noise is reduced as compared with the case where the area is large.

  The shape of the biological vibration detector 12 in the normal direction view of the vibration transmission plate 11 is not limited to a rectangle, and may be, for example, a circle or an ellipse. The thickness of the biological vibration detection unit 12 is, for example, 0.1 mm to 1.0 mm.

  Although the dimensions of the vibration transmission plate 11 and the dimensions of the biological vibration detector 12 have been described, these dimensions are set in consideration of balance. For example, the ratio between the dimension of the vibration transmission plate 11 and the dimension of the biological vibration detection unit 12 is 1 in the length of the biological vibration detection unit 12 in both the longitudinal direction and the short direction. It is desirable to be 5 times to 2.5 times.

  As shown in FIG. 1, the biological vibration data acquisition unit 20 includes a biological vibration data input unit 21, a biological data generation unit 22, a biological data output unit 23, a data storage unit 24, a control unit 25, and the like.

  The biological vibration data input unit 21 is an external interface that connects the biological monitoring sensor 10 and the biological vibration data acquisition unit 20. The biological vibration data input unit 21 receives the input of biological vibration output from the biological monitoring sensor 10. Specifically, the biological vibration data input unit 21 receives input of biological vibration data output from the biological vibration detection unit 12. The biological vibration data input unit 21 outputs the input biological vibration data to the biological data generation unit 22.

  The biological data generation unit 22 receives input of biological vibration data output from the biological vibration data input unit 21. The biological data generation unit 22 generates biological data such as a subject's heartbeat, respiration, voice, and body movement from the biological vibration data. Specifically, each biological data is generated by sampling the biological vibration data at a predetermined cycle. Specifically, the biometric data generation unit 22 generates biometric data of heartbeats by sampling at a cycle of 0.02 s to 0.05 s (20 Hz to 50 Hz), for example. The biometric data generation unit 22 generates respiration biometric data, for example, by sampling at a period of 0.2 s to 2 s (0.5 Hz to 5 Hz). The biometric data generation unit 22 generates biometric data of a voice by performing sampling at a cycle of, for example, 0.001 s to 0.01 s (100 Hz to 1000 Hz). Thus, the biometric data generation unit 22 generates various types of biometric data by changing the sampling period.

  At this time, biometric vibration data and subject identification information for associating the biometric data with the subject or biometric monitoring sensor identification information for identifying individual biomonitoring sensors 10 may be added to the biometric data. In particular, when the biological vibration data acquisition unit 20 is connected to a plurality of biological monitoring sensors 10 and the biological vibration data acquisition unit 20 handles biological vibration data and biological data of a plurality of subjects, the biological vibration data and the biological data It is preferable that subject identification information or biological monitoring sensor identification information is added to the data.

  The biometric data generation unit 22 outputs the generated biometric data such as heartbeat, respiration, and voice to the biometric data output unit 23. In addition, the biometric data generation unit 22 outputs the generated biometric data such as heartbeat, respiration, and voice, and electrical signals related to the biological vibration to the data storage unit 24 so that the information is stored in the data storage unit 24. It may be.

  The biological data output unit 23 is an external interface that connects the biological vibration data acquisition unit 20 and the biological data monitoring unit 30. The biometric data output unit 23 receives input of biometric data output from the biometric data generation unit 22. The biometric data output unit 23 outputs the input biometric data 23 to the biometric data monitoring unit 30. The biological data output unit 23 may output biological vibration data to the biological data monitoring unit 30 in addition to the biological data. Further, the biological data output unit 23 may output biological vibration data, biological data, and the like to a network server (not shown) described later. The biological vibration data, biological data, and the like output from the biological data output unit 23 are stored in a data storage unit in the network server.

  The data storage unit 24 includes a storage device such as a semiconductor memory. The data storage unit 24 stores a control program for operating the biological vibration data acquisition unit 20 and various setting information. As described above, the data storage unit 24 receives input of biometric data, bio-vibration data, and the like generated by the biometric data generation unit 22 and stores them.

  The control unit 25 controls each unit such as the biological vibration data input unit 21, the biological data generation unit 22, the biological data output unit 23, and the data storage unit 24 that constitute the biological vibration data acquisition unit 20. Specifically, the control unit 25 reads a control program from the data storage unit 24 and controls each unit based on the read control program.

  Here, the biological vibration data acquisition unit 20 includes the biological data generation unit 22, and various biological data are generated in the biological data generation unit 22, but the biological vibration data acquisition unit 20 has such a configuration. It is not limited to. For example, the biometric data generation unit 22 may be incorporated in the control unit 25, and the control unit 25 may have the function of the biometric data generation unit 22.

  The biometric data monitoring unit 30 includes a biometric data input unit 31, a display unit 32, a biometric data determination unit 33, a data storage unit 34, a control unit 35, and the like.

  The biological data input unit 31 is an external interface that connects the biological vibration data acquisition unit 20 and the biological data monitoring unit 30. Specifically, the biological data input unit 31 is connected to the biological data output unit 23 of the biological vibration data acquisition unit 20. The biometric data output unit 23 and the biometric data input unit 31 may be directly connected by wire or wirelessly. Further, when the biological vibration data acquisition unit 20 and the biological data monitoring unit 30 are separated from each other, they may be connected to each other through, for example, a network line, or these may be connected via a network server (not shown). Various data may be input / output between the two.

  The biological data input unit 31 receives input of biological vibration data and biological data output from the biological data output unit 23. In addition, the biometric data input unit 31 accesses the data storage unit of the network server and reads bio-vibration data, biometric data, and the like from the data storage unit of the network server, thereby accepting input of these data. Good. The biological data input unit 31 outputs the input biological vibration data, biological data, and the like to the display unit 32. The biological data input unit 31 may output the input biological vibration data, biological data, and the like to the data storage unit 34 so that the biological vibration data and biological data are stored in the data storage unit 34.

  The biological data monitoring unit 30 may be connected to a plurality of biological vibration data acquisition units 20. In this case, the biometric data input unit 31 receives inputs of biovibration data, biometric data, and the like output from the plurality of biovibration data acquisition units 20, but the subject identification added to the biovibration data and the biometric data. Each biological vibration data and biological data is preferably identified based on the information and biological monitoring sensor identification information.

  The display unit 32 receives input of biological vibration data and biological data output from the biological data input unit 31. The display unit 32 displays the input biological vibration data and biological data. For example, the display unit 32 may display all of the input biological vibration data and biological data, or may display only some items of these data.

  The display unit 32 may display the biological vibration data and biological data of a plurality of subjects on one screen or a plurality of screens, or display the biological vibration data and biological data of one subject on a plurality of screens. You may make it display. In addition, the display unit 32 displays a determination result on the state of the subject in the biometric data determination unit 33 to be described later. For example, the operator of the display unit 32 selects subjects to be displayed, items, and the like from the screen of the display unit 32, and the selected subject's biological vibration data, biological data, determination results, and the like are displayed on the display unit 32. It may be.

  The display unit 32 may be, for example, a stationary monitor as used in information equipment, or may be an information terminal that can be easily carried, such as a tablet terminal or a notebook computer.

  The biological data determination unit 33 determines the state of the subject using biological vibration data and biological data. For example, the biological data determination unit 33 determines whether or not the subject is in bed using biological vibration data and biological data. Specifically, when the biological vibration data and the biological data continuously exceed a predetermined threshold for a predetermined period, the biological data determination unit 33 determines that the subject is in the bed, In this case, it is determined that the subject is not in bed.

  Further, for example, the biological data determination unit 33 determines the health condition of the subject using biological data such as heartbeat, respiration, and voice. If these biometric data are within a predetermined range, it is determined that they are healthy, and if they are not within the predetermined range, they are determined not to be healthy.

  Further, for example, the biological data determination unit 33 determines the quality of sleep of the subject using biological data such as heartbeat, respiration, and voice. Specifically, the biometric data determination unit 33 determines that the quality of sleep is high if the biometric data such as heartbeat, respiration, and voice is within a predetermined range. If the biometric data is not within the predetermined range, the quality of sleep is determined. Judge as low.

  Further, for example, the biological data determination unit 33 determines whether the subject has apnea syndrome using biological data such as heartbeat, respiration, and voice. Specifically, the biometric data determination unit 33 determines whether or not the subject has apnea syndrome in consideration of heartbeat and voice biometric data when the respiration biometric data does not exceed a predetermined threshold continuously for a predetermined period. Determine. On the other hand, when the respiration biometric data exceeds a predetermined threshold within a predetermined period, the biometric data determination unit 33 determines that the subject has no apnea syndrome.

  The biometric data determination unit 33 may display these determination results on the display unit 32. The biometric data determination unit 33 outputs these determination results to the data storage unit 34 so that these determination results are stored in the data storage unit 34 in association with the biological vibration data, the biometric data, and the like. Good. These determination results may be output to the network server via the biometric data input unit 31, for example, and stored in the data storage unit in the network server.

  The data storage unit 34 includes a storage device such as a semiconductor memory. The data storage unit 34 stores a control program for operating the biological data monitoring unit 30, various setting information, and the like. As described above, the data storage unit 34 receives input of biological vibration data, biological data, determination results, and stores them.

  The control unit 35 controls each unit such as the biometric data input unit 31, the display unit 32, the biometric data determination unit 33, and the data storage unit 34 that constitute the biometric data monitoring unit 30. Specifically, the control unit 35 reads a control program stored in the data storage unit 34 and controls each unit based on the control program.

  Here, the biological data monitoring unit 20 includes the biological data determination unit 33, and the biological data determination unit 33 determines the state of the subject. However, the biological data monitoring unit 30 is limited to such a configuration. It is not a thing. For example, the biometric data determination unit 33 may be incorporated in the control unit 35, and the control unit 35 may have the function of the biometric data determination unit 33.

  According to the present embodiment, the shape of the biological vibration detection unit 12 of the biological monitoring sensor 10 when viewed in the stacking direction of the vibration transmission plate 11 is rectangular, and the length of the biological vibration detection unit 12 in the longitudinal direction is 20 mm to 500 mm. The length of the biological vibration detection unit 12 in the short direction is 3 mm to 20 mm.

  Up to now, the length in the longitudinal direction of the biological vibration detection unit has been about 800 mm, for example, and the length in the lateral direction has been about 100 mm, for example, but according to the configuration according to the present embodiment, the biological vibration detection unit 12 Is greatly reduced in size. Thereby, the noise contained in the detected biological vibration can be reduced, and the detection accuracy of the biological vibration can be improved. This also improves the accuracy of biological data generated from biological vibration, such as heartbeat, respiration, voice, and body movement.

  In addition, until now, since the biological vibration detection unit was large, the component unit price was high, leading to an increase in manufacturing cost, and the product was expensive. However, according to the configuration according to the present embodiment, the biological vibration detection unit 12 is reduced in size, so that the unit cost of the biological vibration detection unit 12 is reduced, and the manufacturing cost of the biological monitoring sensor 10 is reduced. Product price can be reduced.

  Moreover, according to this Embodiment, the biological vibration detection part 12 consists of a piezoelectric transducer. According to this configuration, the biological vibration is converted into an electrical signal, so that the biological vibration can be easily handled. This also greatly reduces the process of generating biological data from biological vibrations.

  Moreover, according to this Embodiment, the piezoelectric transducer which comprises the biological vibration detection part 12 consists of resin which has ferroelectricity. According to this configuration, since the biological vibration detection unit 12 can convert even a small vibration into an electric signal, the detection accuracy of the biological vibration can be improved.

  Further, according to the present embodiment, the ferroelectric resin constituting the biological vibration detection unit 12 is made of polyvinylidene fluoride. According to this configuration, since the biological vibration detection unit 12 can be configured using an easily mass-produced material that is industrially mass-produced, an increase in manufacturing cost can be suppressed.

  Further, according to the present embodiment, the ratio of the size of the vibration transmission plate 11 and the size of the biological vibration detection unit 12 is such that the length of the vibration transmission plate 11 is the biological vibration in both the longitudinal direction and the short direction. The length of the detection unit 12 is 1.5 to 2.5 times.

  According to this configuration, since the difference in the ratio between the length of the vibration transmission plate 11 and the length of the biological vibration detection unit 12 in each direction can be suppressed, variations in the detection accuracy of biological vibration in each direction can be suppressed.

  Until now, for example, biological vibration data, biological data, and the like have been acquired by installing a biological monitoring sensor on a floor mat or the like. However, since the subject hooks on the biological monitoring sensor cable or the biological monitoring sensor is visually recognized, the subject may not intentionally step on the biological monitoring sensor. In some cases, biometric data or the like could not be acquired.

  On the other hand, according to the present embodiment, the biological monitoring sensor is installed between the bed mat 110 and the bed mud support portion 101 that supports the bed mat 110. According to this configuration, since the biological monitoring sensor 10 is installed so as not to be seen by the subject, the biological vibration data and the biological data are obtained in an unconstrained state without causing the subject to be aware of it, that is, not placing a burden on the subject. Can be acquired. In addition, it is possible to determine whether or not the subject is in bed 100 without making the subject aware of it, and the health condition of the subject can be monitored. In addition, the opportunity for the subject to get on the cable of the biological monitoring sensor is reduced.

  In addition, until now, in order to reduce noise, there has been a case where a biological monitoring sensor is used by sandwiching a cushioning material such as urethane in the biological vibration detection unit, but according to the configuration according to the present embodiment, this There is no need to use such a buffer material, and the thickness of the biological monitoring sensor 10 can be reduced. Thereby, even if the biological monitoring sensor is installed between the bed mat 110 and the bed mat support portion 101, the sleeping comfort is not affected.

  Further, according to the present embodiment, when the subject is in the bed 100, the biological vibration data and the biological data are automatically acquired and generated, so that the work efficiency of a medical worker or the like who uses the biological monitoring system 1 is improved. Can be improved.

(Embodiment 2)
In the present embodiment, a case will be described in which the piezoelectric transducer constituting the biological vibration detection unit of the biological monitoring sensor is made of piezoelectric ceramic. 4A and 4B are diagrams showing an example of the configuration of the biological monitoring sensor according to the second embodiment. FIG. 4A is a plan view and FIG. 4B is a cross-sectional view. FIG. 5 is a diagram illustrating an example of another configuration of the biological monitoring sensor according to the second embodiment. FIG. 5A is a plan view and FIG. 5B is a cross-sectional view.

  The biological monitoring sensor 15 includes a vibration transmission plate 11 and a biological vibration detector 17 as shown in FIGS. 4 (a) and 4 (b). As shown in FIG. 4B, the biological monitoring sensor 15 has a configuration in which a biological vibration detection unit 17 is stacked on the main surface 11 a of the vibration transmission plate 11.

In the present embodiment, the piezoelectric transducer constituting the biological vibration detector 17 is made of a piezoelectric ceramic having ferroelectricity. Examples of the piezoelectric ceramic used in the biological vibration detection unit 17 include barium titanate (BaTiO ₃ ), lead titanate (PbTiO ₃ ), and lead zirconate titanate (PB (Zr, Ti) O ₃ ). .

  The shape of the biological vibration detection unit 17 in the view of the vibration transmission plate 11 in the stacking direction, that is, in the normal direction of the vibration transmission plate 11 is, for example, substantially circular. In this case, the diameter of the vibration transmission plate 11 is, for example, 20 mm to 41 mm. Moreover, the diameter of the biological vibration detection unit 12 is, for example, 14 mm to 25 mm. The reason why the length of the diameter of the substantially circular biological vibration detector 17 is defined in this way is as follows. This is because when the diameter of the biological vibration detection unit 17 is less than 14 mm, the biological vibration detection unit 17 is too small and the detection capability of biological vibration is insufficient. Moreover, when the diameter of the biological vibration detection unit 17 exceeds 25 mm, the biological vibration detection unit 17 is too large, and a large noise may be added to the detected biological vibration. The thickness of the biological vibration detection unit 17 is, for example, 0.3 mm to 0.8 mm.

  Moreover, as shown in FIGS. 5A and 5B, the biological monitoring sensor 15 according to the present embodiment includes, for example, a metal plate 18 between the vibration transmission plate 11 and the biological vibration detection unit 17. The provided structure may be sufficient. For example, the metal plate 18 can easily join the vibration transmission plate 11 made of resin and the biological vibration detection unit 17 made of ceramics. The metal plate 18 is made of, for example, copper or aluminum. The shape of the metal plate 18 in the lamination direction view of the vibration transmission plate 11, that is, in the normal direction view of the vibration transmission plate 11, is, for example, a substantially circular shape. The length of the diameter of the metal plate 18 is, for example, 20 mm to 41 mm in consideration of the length of the diameter of the biological vibration detection unit 15.

  According to the present embodiment, the shape of the biological vibration detection unit 17 of the biological monitoring sensor 15 when viewed in the stacking direction of the vibration transmission plate 11 is substantially circular, and the diameter of the biological vibration detection unit 17 is approximately 14 mm to 25 mm. . According to this configuration, since the biological vibration detection unit 17 is significantly reduced in size, noise included in the detected biological vibration can be reduced, and detection accuracy of biological vibration can be improved. This also improves the accuracy of biological data generated from biological vibration, such as heartbeat, respiration, voice, and body movement.

  Further, according to the present embodiment, the biological vibration detection unit 17 is composed of a piezoelectric transducer. According to this configuration, the biological vibration is converted into an electrical signal, so that the biological vibration can be easily handled. This also greatly reduces the process of generating biological data from biological vibrations.

  Further, according to the present embodiment, the biological vibration detection unit 17 is made of a piezoelectric ceramic having ferroelectricity. According to this configuration, since inexpensive piezoelectric ceramics are used for the biological vibration detection unit 17, the manufacturing cost can be reduced.

(Embodiment 3)
In the present embodiment, a case where the above-described biological monitoring sensors 10 and 15 are installed on a toilet seat will be described. 6A and 6B are diagrams illustrating an example of a biological monitoring sensor installation method according to the third embodiment. FIG. 6A is a plan view of the toilet seat, and FIG. 6B is a cross-sectional view of the toilet seat.

  The biological monitoring sensors 10 and 15 are installed in a toilet seat 200 used by a subject, for example, as shown in FIGS. 6 (a) and 6 (b). Specifically, the biological monitoring sensors 10 and 15 are installed inside the toilet seat 200 as shown in FIG. The shape of the toilet seat 200 in plan view is, for example, an elliptical ring shape as shown in FIG. For this reason, the shape of the biological monitoring sensors 10 and 15 in plan view may be, for example, an elliptical ring along the toilet seat 200, or may be a shape obtained by cutting off a part of the elliptical ring. For example, the shape of the vibration transmission plate 11 and the biological vibration detection unit 12 constituting the biological monitoring sensors 10 and 15 is an elliptical ring or a shape obtained by cutting out a part of the elliptical ring.

  In the case of the biological monitoring sensor 10 that uses a resin having ferroelectricity for the biological vibration detection unit 12, the radial length of the vibration transmission plate 11 is, for example, 10 mm to 30 mm, and the circumferential length is, for example, 30 mm. ~ 100 mm. Moreover, the length of the radial direction of the biological vibration detection part 12 is 10 mm-20 mm, for example, and the length of the circumferential direction is 20 mm-100 mm, for example. Also in this case, it is desirable that the length of the vibration transmission plate 11 is 1.5 to 2.5 times the length of the biological vibration detection unit 12 in both the circumferential direction and the radial direction.

  The biological monitoring sensors 10 and 15 detect the biological vibration of the subject using the toilet as an electrical signal, and output the detected biological vibration to the biological vibration data acquisition unit 20 as biological vibration data. The biological vibration data acquisition unit 20 generates biological data based on the biological vibration data, and outputs the generated biological data to the biological data monitoring unit 30. The biological data monitoring unit 30 determines whether the subject is in the toilet based on the biological data. Moreover, you may make it monitor a test subject's health state using biometric data.

  According to the present embodiment, the biological monitoring sensors 10 and 15 are installed inside the toilet seat 200. Thereby, even if a test subject leaves | separates from a bed, the location can be confirmed and a health condition can be monitored.

  Further, according to the present embodiment, the shape of the biological monitoring sensors 10, 15, that is, the shape of the vibration transmission plate 11 is a shape that matches the shape of the toilet seat 200. Thereby, the biological vibration data and biological data in the toilet seat 200 can be easily acquired and generated.

  Further, according to the present embodiment, in the case of the biological monitoring sensor 10 using the resin having ferroelectricity for the biological vibration detection unit 12, the ratio between the dimension of the vibration transmission plate 11 and the dimension of the biological vibration detection unit 12 is In both the circumferential direction and the radial direction, the length of the vibration transmission plate 11 is 1.5 to 2.5 times the length of the biological vibration detection unit 12.

  According to this configuration, since the difference in the ratio between the length of the vibration transmission plate 11 and the length of the biological vibration detection unit 12 in each direction can be suppressed, variations in the detection accuracy of biological vibration in each direction can be suppressed.

(Embodiment 4)
In the present embodiment, a case where the above-described biological monitoring sensors 10 and 15 are installed in a chair will be described. 7A and 7B are diagrams illustrating an example of a method for installing the biological monitoring sensor according to the fourth embodiment. FIG. 7A is a cross-sectional view when the sensor is installed on a seating surface, and FIG. 7B is a backrest. FIG. 7C is a cross-sectional view when installed on a cushion, and FIG. 7C is a cross-sectional view when installed on a cushion.

  The biological monitoring sensors 10 and 15 are installed in the chair 300 as shown in FIGS. 7A and 7B, for example. Specifically, the biological monitoring sensors 10 and 15 are installed inside the seating surface 301 as shown in FIG. Alternatively, the biological monitoring sensors 10 and 15 are installed inside the backrest 302 as shown in FIG. The installation location of the biological monitoring sensors 10 and 15 is not limited to a chair of a medical institution such as a hospital, and may be a chair for an employee such as an office. Moreover, the biological monitoring sensors 10 and 15 may be installed inside a cushion 350 arranged on the seat surface 301 as shown in FIG. The biological monitoring sensors 10 and 15 can have a rectangular shape, a circular shape, an elliptical shape, or the like, for example.

  The biological monitoring sensors 10 and 15 detect biological vibration of a subject (employee or the like) who uses the chair 300 as an electrical signal, and output the detected biological vibration to the biological vibration data acquisition unit 20 as biological vibration data. The biological vibration data acquisition unit 20 generates biological data based on the biological vibration, and outputs the generated biological data to the biological data monitoring unit 30. The biometric data monitoring unit 30 determines whether the subject is sitting on the chair 300 based on the biometric data. Moreover, you may make it monitor a test subject's health state using biometric data.

  According to the present embodiment, the biological monitoring sensors 10 and 15 are installed inside the seat surface 301 of the chair 300. Thereby, even if a test subject is not in a bed or a toilet, the location can be confirmed and the health condition can be monitored.

  Further, according to the present embodiment, the biological monitoring sensors 10 and 15 are installed inside the backrest 302 of the chair 300. Thereby, even if a test subject is not in a bed or a toilet, the location can be confirmed and the health condition can be monitored.

  Further, according to the present embodiment, in the case of the biological monitoring sensor 10 using the resin having ferroelectricity for the biological vibration detection unit 12, the ratio between the dimension of the vibration transmission plate 11 and the dimension of the biological vibration detection unit 12 is The length of the vibration transmission plate 11 is 1.5 to 2.5 times the length of the biological vibration detector 12 in both the longitudinal direction and the short direction.

  According to this configuration, since the difference in the ratio between the length of the vibration transmission plate 11 and the length of the biological vibration detection unit 12 in each direction can be suppressed, variations in the detection accuracy of biological vibration in each direction can be suppressed.

  In addition, according to the present embodiment, the biological monitoring sensors 10 and 15 are installed inside the cushions 350 disposed on the seat surface 301 of the chair 300. Thereby, even when the biological monitoring sensors 10 and 15 cannot be installed inside the seat surface 301 and the backrest 302 of the chair 300, the biological vibration data and biological data of the subject using the chair 300 can be acquired and generated.

  Further, according to the present embodiment, it can be determined whether or not the employee is at his / her seat, and the health condition of the employee can be monitored.

(Embodiment 5)
In the present embodiment, a case where the above-described biological monitoring sensors 10 and 15 are installed in a vehicle seat such as an automobile will be described. 8A and 8B are diagrams illustrating an example of a method for installing the biological monitoring sensor according to the fifth embodiment, in which FIG. 8A is a cross-sectional view when installed on a seating surface, and FIG. 8B is a backrest. FIG. 8C is a cross-sectional view when installed in a cushion, and FIG.

  The biological monitoring sensors 10 and 15 are installed on the vehicle seat 400 as shown in FIGS. 8A and 8B, for example. Specifically, the biological monitoring sensors 10 and 15 are installed inside the seating surface 401 as shown in FIG. Alternatively, the biological monitoring sensors 10 and 15 are installed inside the backrest 402 as shown in FIG. Moreover, the biological monitoring sensors 10 and 15 may be installed inside a cushion 450 arranged on the seat surface 401 as shown in FIG. The biological monitoring sensors 10 and 15 can have a rectangular shape, a circular shape, an elliptical shape, or the like, for example.

  In the case of the biological monitoring sensor 10 that uses a resin having ferroelectricity for the biological vibration detection unit 12, the length of the vibration transmission plate 11 in the short direction is, for example, 20 mm to 50 mm, and the length in the longitudinal direction is, for example, 100 mm to 250 mm. Moreover, the length of the transversal direction of the biological vibration detection unit 12 is, for example, 10 mm to 20 mm, and the length of the longitudinal direction is, for example, 20 mm to 250 mm. Also in this case, it is desirable that the length of the vibration transmission plate 11 is 1.5 to 2.5 times the length of the biological vibration detection unit 12 in both the longitudinal direction and the short direction.

  The biological monitoring sensors 10 and 15 detect the biological vibration of the subject (driver) using the vehicle seat 400 as an electrical signal, and output the detected biological vibration to the biological vibration data acquisition unit 20 as biological vibration data. The biological vibration data acquisition unit 20 generates biological data based on the biological vibration, and outputs the generated biological data to the biological data monitoring unit 30. The biometric data monitoring unit 30 determines whether the driver is seated on the seat based on the biometric data. Moreover, you may make it monitor a driver | operator's health state using biometric data. For example, it is determined whether or not the driver's health condition interferes with driving the vehicle, such as determining whether or not the driver is in an excessive stress state based on biometric data such as heartbeat and respiration.

  According to the present embodiment, the biological monitoring sensors 10 and 15 are installed inside the seat surface 401 of the vehicle seat 400. Thereby, it can be determined whether the driver is in the driver's seat, that is, the vehicle seat 400, and the health state of the driver can be monitored.

  Further, according to the present embodiment, the biological monitoring sensors 10 and 15 are installed inside the backrest 402 of the vehicle seat 400. Thereby, it can be determined whether the driver is in the driver's seat, that is, the vehicle seat 400, and the health state of the driver can be monitored.

  Further, according to the present embodiment, in the case of the biological monitoring sensor 10 using the resin having ferroelectricity for the biological vibration detection unit 12, the ratio between the dimension of the vibration transmission plate 11 and the dimension of the biological vibration detection unit 12 is The length of the vibration transmission plate 11 is 1.5 to 2.5 times the length of the biological vibration detector 12 in both the longitudinal direction and the short direction.

  According to this configuration, since the difference in the ratio between the length of the vibration transmission plate 11 and the length of the biological vibration detection unit 12 in each direction can be suppressed, variations in the detection accuracy of biological vibration in each direction can be suppressed.

  Further, according to the present embodiment, the biological monitoring sensors 10 and 15 are installed inside the cushions 450 disposed on the seat surface 401 of the vehicle seat 400. Thereby, even when the biological monitoring sensors 10 and 15 cannot be installed inside the seat surface 401 and the backrest 402 of the automobile seat 400, the biological vibration data and biological data of the subject using the vehicle seat 400 are acquired and generated. Can do.

(Other embodiments)
The above-described biological monitoring sensors 10 and 15 may be installed on a pet bed, for example. Thereby, it can be determined whether the pet is on the bed or not. Moreover, the health state of the pet can be determined based on the biometric data.

  In addition, the above-described biological monitoring sensors 10 and 15 may be installed in, for example, a tunnel, a bridge, a building foundation, or the like. In this case, the biological monitoring sensors 10 and 15 monitor vibrations of tunnels, bridges, building foundations, and the like, and an alarm is notified when abnormal vibrations different from normal are detected. Moreover, in order to detect abnormal vibration, it is preferable that vibration data is acquired over a long period of time. By comparing with past vibration data, the detection accuracy of abnormal vibration can be improved.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiments of the invention. However, the present invention is not limited to the embodiments of the invention, and various modifications can be made without departing from the scope of the invention. It goes without saying that it is possible.

  In addition, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.

  Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. . In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment. Note that the members and relative sizes described in the drawings are simplified and idealized for easy understanding of the present invention, and may have a more complicated shape in mounting.

  Hereinafter, preferred main aspects of the present invention will be additionally described.

[Appendix 1]
A biological monitoring sensor installed between a bed mat and a bed mud support that supports the bed mat,
A vibration transmission plate for transmitting human biological vibrations;
A biological vibration detection unit that is laminated on the main surface of the vibration transmission plate, detects the biological vibration transmitted from the vibration transmission plate, and is made of a resin having ferroelectricity, and
The shape of the vibration transmission plate in the lamination direction view of the vibration transmission plate is rectangular, the shape of the biological vibration detection unit in the lamination direction view of the vibration transmission plate is rectangular,
The longitudinal direction of the biological vibration detection unit is along the longitudinal direction of the vibration transmission plate, and the short direction of the biological vibration detection unit is along the short direction of the vibration transmission plate;
The length of the vibration transmission plate in the longitudinal direction is 600 mm to 900 mm, the length of the vibration transmission plate in the short direction is 20 mm to 100 mm, the length of the biological vibration detection unit in the longitudinal direction is 20 mm to 500 mm, and the biological vibration The length in the short direction of the detection unit is 10 mm to 20 mm,
Biological monitoring sensor.

[Appendix 2]
In the biological monitoring sensor according to attachment 1,
The length in the longitudinal direction of the vibration transmitting plate is 1.5 to 2.5 times the length in the longitudinal direction of the biological vibration detecting unit, and the length in the short direction of the vibration transmitting plate is 1.5 to 2.5 times the length in the short direction of the biological vibration detection unit,
Biological monitoring sensor.

[Appendix 3]
A biological monitoring sensor installed inside the toilet seat,
A vibration transmission plate for transmitting human biological vibrations;
A biological vibration detection unit that is laminated on the main surface of the vibration transmission plate, detects the biological vibration transmitted from the vibration transmission plate, and is made of a resin having ferroelectricity, and
The shape of the vibration transmission plate in the lamination direction view of the vibration transmission plate is a shape obtained by cutting out a part of the elliptical ring, and the shape of the biological vibration detection unit in the view of the vibration transmission plate in the lamination direction is cut out of a part of the elliptical ring. Shape
The circumferential direction of the biological vibration detection unit is along the circumferential direction of the vibration transmission plate, and the radial direction of the biological vibration detection unit is along the radial direction of the vibration transmission plate,
The length of the vibration transmission plate in the circumferential direction is 30 mm to 100 mm, the length of the vibration transmission plate in the radial direction is 10 mm to 30 mm, the length of the biological vibration detection unit in the circumferential direction is 20 mm to 100 mm, and the biological vibration detection The radial length of the part is 10 mm to 20 mm,
Biological monitoring sensor.

[Appendix 4]
In the biological monitoring sensor according to attachment 3,
The circumferential length of the vibration transmission plate is 1.5 to 2.5 times the circumferential length of the biological vibration detector, and the radial length of the vibration transmission plate is the 1.5 times to 2.5 times the radial length of the biological vibration detection unit,
Biological monitoring sensor.

[Appendix 5]
A biological monitoring sensor installed in the seat surface of the chair or in the back of the chair,
A vibration transmission plate for transmitting human biological vibrations;
A biological vibration detection unit that is laminated on the main surface of the vibration transmission plate, detects the biological vibration transmitted from the vibration transmission plate, and is made of a resin having ferroelectricity, and
The shape of the vibration transmission plate in the lamination direction view of the vibration transmission plate is rectangular, the shape of the biological vibration detection unit in the lamination direction view of the vibration transmission plate is rectangular,
The longitudinal direction of the biological vibration detection unit is along the longitudinal direction of the vibration transmission plate, and the short direction of the biological vibration detection unit is along the short direction of the vibration transmission plate;
The length of the vibration transmission plate in the longitudinal direction is 100 mm to 250 mm, the length of the vibration transmission plate in the short direction is 20 mm to 50 mm, the length of the biological vibration detection unit in the longitudinal direction is 20 mm to 250 mm, and the biological vibration The length in the short direction of the detection unit is 10 mm to 20 mm,
Biological monitoring sensor.

[Appendix 6]
In the biological monitoring sensor according to appendix 5,
The length in the longitudinal direction of the vibration transmitting plate is 1.5 to 2.5 times the length in the longitudinal direction of the biological vibration detecting unit, and the length in the short direction of the vibration transmitting plate is 1.5 to 2.5 times the length in the short direction of the biological vibration detection unit,
Biological monitoring sensor.

[Appendix 7]
A biological monitoring sensor installed in the seat surface of the vehicle seat or in the backrest of the vehicle seat,
A vibration transmission plate for transmitting human biological vibrations;
A biological vibration detection unit that is laminated on the main surface of the vibration transmission plate, detects the biological vibration transmitted from the vibration transmission plate, and is made of a resin having ferroelectricity, and
The shape of the vibration transmission plate in the lamination direction view of the vibration transmission plate is rectangular, the shape of the biological vibration detection unit in the lamination direction view of the vibration transmission plate is rectangular,
The longitudinal direction of the biological vibration detection unit is along the longitudinal direction of the vibration transmission plate, and the short direction of the biological vibration detection unit is along the short direction of the vibration transmission plate;
The length of the vibration transmission plate in the longitudinal direction is 100 mm to 250 mm, the length of the vibration transmission plate in the short direction is 20 mm to 50 mm, the length of the biological vibration detection unit in the longitudinal direction is 20 mm to 250 mm, and the biological vibration The length in the short direction of the detection unit is 10 mm to 20 mm,
Biological monitoring sensor.

[Appendix 8]
In the biological monitoring sensor according to appendix 7,
The length in the longitudinal direction of the vibration transmitting plate is 1.5 to 2.5 times the length in the longitudinal direction of the biological vibration detecting unit, and the length in the short direction of the vibration transmitting plate is 1.5 to 2.5 times the length in the short direction of the biological vibration detection unit,
Biological monitoring sensor.

  DESCRIPTION OF SYMBOLS 1 ... Living body monitoring system, 10 ... Living body monitoring sensor, 11 ... Vibration transmission board, 12 ... Living body vibration detection part, 15 ... Living body monitoring sensor, 20 ... Living body vibration data acquisition part, 22 ... Living body data generation part, 30 ... Biometric data monitoring unit, 33 ... Biometric data determination unit, 100 ... Bed, 101 ... Bed mat support unit, 110 ... Bed mat, 200 ... Toilet seat, 300 ... Chair, 301 ... Seat surface, 302 ... Backrest, 350 ... Cushion, 400 ... Vehicle seat 401 ... Seat surface 402 ... Backrest 450 ... Cushion

Claims (15)

A vibration transmission plate for transmitting human biological vibrations;
A biological vibration detection unit that is stacked on the main surface of the vibration transmission plate and detects the biological vibration transmitted from the vibration transmission plate;
The shape of the biological vibration detection unit as viewed in the stacking direction of the vibration transmitting plate is rectangular, the length in the longitudinal direction of the biological vibration detection unit is 20 mm to 500 mm, and the length in the short direction of the biological vibration detection unit is 3 mm to 20 mm,
Biological monitoring sensor. The biological monitoring sensor according to claim 1,
The biological vibration detection unit is composed of a piezoelectric transducer,
Biological monitoring sensor. The biological monitoring sensor according to claim 2,
The piezoelectric transducer is made of a resin having ferroelectricity,
Biological monitoring sensor. The biological monitoring sensor according to claim 3,
The ferroelectric resin is made of polyvinylidene fluoride;
Biological monitoring sensor. A vibration transmission plate for transmitting human biological vibrations;
A biological vibration detection unit that is stacked on the main surface of the vibration transmission plate and detects the biological vibration transmitted from the vibration transmission plate;
The shape of the biological vibration detection unit as viewed in the stacking direction of the vibration transmission plate is substantially circular, and the diameter of the biological vibration detection unit is 14 mm to 25 mm.
Biological monitoring sensor. The biological monitoring sensor according to claim 5,
The biological vibration detection unit is composed of a piezoelectric transducer,
Biological monitoring sensor. The biological monitoring sensor according to claim 6,
The piezoelectric transducer is made of a piezoelectric ceramic having ferroelectricity,
Biological monitoring sensor. The biological monitoring sensor according to claim 3,
The shape of the vibration transmission plate in the lamination direction view of the vibration transmission plate is rectangular,
The longitudinal direction of the biological vibration detection unit is along the longitudinal direction of the vibration transmission plate, and the short direction of the biological vibration detection unit is along the short direction of the vibration transmission plate;
The length in the longitudinal direction of the vibration transmitting plate is 1.5 to 2.5 times the length in the longitudinal direction of the biological vibration detecting unit, and the length in the short direction of the vibration transmitting plate is 1.5 to 2.5 times the length in the short direction of the biological vibration detection unit,
Biological monitoring sensor. The biological monitoring sensor according to claim 1 or 5 is installed between a bed mat and a bed mud support that supports the bed mat.
How to install a biological monitoring sensor. The biological monitoring sensor according to claim 1 or 5 is installed inside a toilet seat.
How to install a biological monitoring sensor. The biological monitoring sensor according to claim 1 or 5 is installed inside a seat surface of a chair.
How to install a biological monitoring sensor. The biological monitoring sensor according to claim 1 or 5 is installed inside a backrest of a chair.
How to install a biological monitoring sensor. The biological monitoring sensor according to claim 1 or 5 is installed inside a seat surface of a vehicle seat.
How to install a biological monitoring sensor. The biological monitoring sensor according to claim 1 or 5 is installed inside a backrest of a vehicle seat.
How to install a biological monitoring sensor. The living body monitoring sensor according to claim 1 or 5 is installed inside a cushion.
How to install a biological monitoring sensor.

Images