WO2017209239A1 - Dispositif de détection de pression et système de mesure d'informations biologiques - Google Patents

Dispositif de détection de pression et système de mesure d'informations biologiques Download PDF

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Publication number
WO2017209239A1
WO2017209239A1 PCT/JP2017/020430 JP2017020430W WO2017209239A1 WO 2017209239 A1 WO2017209239 A1 WO 2017209239A1 JP 2017020430 W JP2017020430 W JP 2017020430W WO 2017209239 A1 WO2017209239 A1 WO 2017209239A1
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WO
WIPO (PCT)
Prior art keywords
piezoelectric element
pressure
hollow body
end wall
detection device
Prior art date
Application number
PCT/JP2017/020430
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English (en)
Japanese (ja)
Inventor
眞 松浦
陽祐 木村
長岡　浩
Original Assignee
パラマウントベッド株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by パラマウントベッド株式会社 filed Critical パラマウントベッド株式会社
Priority to CN201780017225.XA priority Critical patent/CN109154534B/zh
Publication of WO2017209239A1 publication Critical patent/WO2017209239A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/113—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/02—Measuring force or stress, in general by hydraulic or pneumatic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means

Definitions

  • the present invention relates to a pressure detection device and a biological information measurement system.
  • the present application claims priority based on Japanese Patent Application No. 2016-111191 filed in Japan on June 3, 2016, the contents of which are incorporated herein by reference.
  • the biological information measurement system includes a pressure receiving unit and a pressure detection device.
  • the pressure receiving unit receives pressure
  • the pressure receiving unit pumps air (sends pressure) to the pressure detection device.
  • a piezoelectric element is provided as a pressure detection device. It is conceivable to adopt a configuration. In this configuration, the pressure of the air fed from the pressure receiving unit is received by the piezoelectric element and converted into a voltage. At this time, if the pressure receiving part receives a large pressure exceeding the assumed measurement range and the pressure of the air pumped from the pressure receiving part to the pressure detection device becomes excessively high, the voltage converted by the piezoelectric element is excessively large. Get higher. As a result, there is a possibility that the measurement accuracy of the minute pressure fluctuation generated in the measurement object may temporarily decrease.
  • the present invention has been made in view of the above-described circumstances, and an object thereof is to measure a minute pressure fluctuation generated in a measurement object with high accuracy.
  • a pressure detection device includes a piezoelectric element, a hollow body provided with an input chamber having the piezoelectric element as a part of a wall surface, and provided in the hollow body and communicated with the input chamber, An introduction portion for introducing air into the input chamber in a direction inclined with respect to the piezoelectric element.
  • the tilting direction includes a direction parallel to the piezoelectric element and does not include a perpendicular direction of the piezoelectric element.
  • the introduction unit introduces air into the input chamber in the inclined direction. Therefore, for example, compared with the case where the introduction portion introduces air into the input chamber in the direction of the perpendicular, the pressure directly received by the piezoelectric element from the air introduced into the input chamber through the introduction portion can be suppressed to be small. it can.
  • the introduction unit introduces air into the input chamber in the perpendicular direction
  • the piezoelectric element and the introduction unit are separated from each other in order to reduce the pressure that the piezoelectric element receives directly from the air. It is also possible.
  • the introduction unit introduces air into the input chamber in the inclined direction
  • the pressure can be suppressed small after the piezoelectric element and the introduction unit are brought close to each other.
  • this pressure detection device it is possible to measure a minute pressure fluctuation generated in the measurement object with high accuracy while reducing the size.
  • the piezoelectric element is accommodated in the hollow body, and a reference chamber is provided on the opposite side of the input chamber with the piezoelectric element sandwiched in the hollow body. You may employ
  • the piezoelectric element forms a reference chamber on the opposite side of the input chamber sandwiching the piezoelectric element in the hollow body. Therefore, when air is introduced into the input chamber through the introducing portion, the piezoelectric element can be deformed based on the pressure difference between the input chamber and the reference chamber. Thereby, it is possible to measure a minute pressure fluctuation generated in the measurement object with higher accuracy.
  • the hollow body includes a first end wall portion and a second end wall portion facing each other, and a peripheral wall portion connecting these both end wall portions.
  • the piezoelectric element may be inclined with respect to the first end wall.
  • the hollow body includes both end wall portions and a peripheral wall portion.
  • the piezoelectric element is inclined with respect to the first end wall portion. Therefore, for example, a larger piezoelectric element can be disposed in the hollow body than when the piezoelectric element is disposed in parallel with the first end wall portion. As a result, it is possible to easily increase the sensitivity of the piezoelectric element, and minute pressure fluctuations occurring in the measurement target can be measured with higher accuracy.
  • the pressure detection device further includes a substrate that is accommodated in the hollow body and connected to the piezoelectric element, and the piezoelectric element is interposed between the first end wall portion and the substrate.
  • the input chamber is formed, and the substrate is disposed between the piezoelectric element and the second end wall portion in the hollow body and extends along the first end wall portion. May be.
  • the piezoelectric element is inclined with respect to the first end wall portion. That is, in the piezoelectric element, one end portion of the pair of end portions located on both sides in the inclined direction is closer to the first end wall portion than the other end portion. Thereby, a wide space can be secured between the one end portion and the substrate.
  • the substrate extends along the first end wall. Therefore, the substrate and the second end wall portion can be brought close to each other by disposing a protrusion (for example, an electronic component for arithmetic processing) disposed on the substrate in the wide space. Thereby, it is possible to shorten the distance between both end wall portions while arranging the substrate in the hollow body, and it is possible to reliably reduce the size of the pressure detection device.
  • the introduction part is provided in the peripheral wall part. Therefore, when the hollow body is gripped so as to sandwich the both end wall portions, or when the first end wall portion or the second end wall portion is installed on the installation surface, the introduction portion can be prevented from becoming an obstacle. it can. Thereby, the handleability of a pressure detection apparatus can further be improved.
  • the pressure detection device according to any one of (2) to (5) further includes a chamber member that is housed in the hollow body and forms the reference chamber with the piezoelectric element. You may employ
  • the reference chamber is formed between the piezoelectric element and the chamber member, the degree of freedom in designing the reference chamber can be easily increased.
  • a configuration further including a communication portion capable of communicating the inside of the reference chamber and the outside of the hollow body is adopted. May be.
  • the pressure outside the hollow body may vary.
  • the external pressure may fluctuate slightly by opening and closing the door.
  • the input chamber may be affected by external pressure fluctuations through the introduction portion.
  • the reference chamber is not similarly affected by fluctuations in external pressure, the measurement accuracy may be reduced.
  • the inside of the reference chamber and the outside of the hollow body can communicate with each other through the communicating portion. Therefore, when the input chamber is affected by fluctuations in external pressure, the reference chamber and the outside of the hollow body can be communicated with each other through the communication portion, so that the reference chamber is similarly affected through the communication portion. Can do.
  • the in-phase component of pressure fluctuation can be canceled.
  • the communication between the inside of the reference chamber and the outside of the hollow body through the communication portion is blocked so that the reference chamber is not affected. be able to.
  • the introduction unit introduces air into the input chamber toward the center of the piezoelectric element, it is possible to accurately measure minute pressure fluctuations occurring in the measurement target and to ensure good measurement sensitivity. it can.
  • a biological information measurement system includes a pressure receiving unit that receives pressure from a measurement target, and the pressure detection device according to any one of (1) to (8), wherein the pressure receiving When the part receives pressure, the pressure receiving part pumps air to the introduction part.
  • the biological information measurement system includes the pressure detection device, it is possible to measure a minute pressure fluctuation generated in the measurement object with high accuracy.
  • FIG. 1 It is the figure which looked at a part in the biological information measurement system concerning one embodiment of the present invention. It is a top view of the 1st division body of the pressure detection apparatus which comprises the living body information measuring system shown in FIG. It is a perspective view which shows the state which reversed the chamber member of the pressure detection apparatus which comprises the biometric information measurement system shown in FIG.
  • the biological information measuring system 10 can be used for the purpose of watching and sleeping management in the medical field and the nursing field.
  • the biological information measurement system 10 can also be used for the purpose of managing the heart rate, rumination rate, and body movement of livestock in the livestock field.
  • the biological information measurement system 10 measures minute pressure fluctuations (for example, respiratory rate, heart rate, etc.) generated in a measurement target (for example, animals such as humans and domestic animals) as biological information. Further, the biological information measuring system 10 can measure not only the minute pressure fluctuation but also a pressure fluctuation (for example, body movement) having an amplitude larger than the minute pressure fluctuation as biological information.
  • minute pressure fluctuations for example, respiratory rate, heart rate, etc.
  • a measurement target for example, animals such as humans and domestic animals
  • the biological information measurement system 10 when used as a couch device (bed) in the medical field or the nursing care field, the biological information measurement system 10 can measure the respiration rate, heart rate, body motion, landing, and bed presence of a person on the couch. Can measure bed leaving.
  • the biological information measurement system 10 when used in a toilet or a wheelchair, the biological information measurement system 10 can measure the respiration rate and heart rate of a person seated in the toilet or wheelchair and the presence or absence of the person sitting in the toilet or wheelchair. it can.
  • the living body information measurement system 10 measures the living body information of the measurement object without restriction by being applied to the bed apparatus, the toilet, and the wheelchair as described above.
  • the biological information measurement system 10 detects a signal in a low frequency region (for example, a frequency is 0.1 Hz to 200 Hz).
  • the measurement result of the biological information measurement system 10 is sent to an external information processing apparatus (not shown).
  • the information processing apparatus displays, for example, a measurement result on a display unit or stores a measurement result in a storage unit.
  • the biological information measurement system 10 includes a pressure receiving unit 11, a pressure detection device 12, and a connection pipe 13.
  • the pressure receiving unit 11 receives pressure from the measurement object.
  • the pressure receiving portion 11 is a hollow air pad that can be elastically deformed.
  • the pressure receiving unit 11 receives pressure, the pressure receiving unit 11 is compressed and deformed, and the air inside the pressure receiving unit 11 is pumped to the pressure detection device 12.
  • the air itself acts as a damping damper, and pressure fluctuations based on vibrations in the sound range (relatively high frequency, for example, the frequency is about 300 Hz to 4 kHz) are not substantially transmitted to the pressure detection device 12. .
  • the pressure detection device 12 detects the pressure received by the pressure receiving unit 11.
  • the pressure detection device 12 includes a hollow body 15, a chamber member 16, a piezoelectric element 17, a communication unit 18, a blocking unit 19, a substrate 20, and an introduction unit 21.
  • the hollow body 15 includes a first end wall portion 22, a second end wall portion 23, and a peripheral wall portion 24.
  • the first end wall portion 22 and the second end wall portion 23 face each other. These both end wall parts 22 and 23 are mutually equivalent shape, and are formed in the equivalent magnitude
  • Each of the two end wall portions 22 and 23 has a rectangular shape in plan view.
  • the longitudinal direction of the rectangle is referred to as the longitudinal direction X
  • the short direction is referred to as the short direction Y
  • a direction in which the first end wall portion 22 and the second end wall portion 23 face each other is referred to as a facing direction Z.
  • the peripheral wall portion 24 connects both end wall portions 22 and 23.
  • the peripheral wall portion 24 is disposed between the both end wall portions 22 and 23 and is formed in a rectangular frame shape in plan view.
  • the peripheral wall portion 24 includes a pair of long side wall portions 25 and a pair of short side wall portions 26.
  • Each longitudinal side wall portion 25 extends in the longitudinal direction X.
  • Each short side wall portion 26 extends in the short direction Y.
  • the end portion of the long side wall portion 25 and the end portion of the short side wall portion 26 are connected to each other to form a corner portion of the peripheral wall portion 24.
  • the board pedestal 27 includes four support columns 29. Each column part 29 is arranged at a corner of the peripheral wall part 24. Each column portion 29 extends from the first end wall portion 22 toward the second end wall portion 23. Each support
  • the element pedestal portion 28 protrudes from the first end wall portion 22 toward the second end wall portion 23.
  • the size of the element pedestal portion 28 in the facing direction Z gradually decreases from the first side X1 in the longitudinal direction X toward the second side X2.
  • the element base 28 is smaller in the facing direction Z than the column 29.
  • the surface of the element pedestal 28 that faces the second end wall 23 is inclined with respect to the first end wall 22.
  • the surface is an inclined surface inclined in the longitudinal direction X.
  • connection side wall portion 26a The end portion of the element base portion 28 on the first side X1 is connected to one short side wall portion 26 (hereinafter referred to as “connection side wall portion 26a”).
  • connection side wall portion 26a The end portion on the second side X2 of the element base portion 28 is separated from the other short side wall portion 26 in the longitudinal direction X. This end is formed in a curved shape that protrudes toward the second side X2 in a plan view of the element base 28.
  • Each end of the element base 28 in the short direction Y is connected to a pair of long side walls 25.
  • the element pedestal 28 protrudes from the first end wall 22 in a cylindrical shape and has an internal space.
  • the inner peripheral surface of the element pedestal portion 28 is formed in a circular shape (perfect circle shape) in the plan view of the element pedestal portion 28.
  • An annular step 30 is formed on the inner peripheral edge of the element base 28 on the surface.
  • the hollow body 15 is divided into two in the facing direction Z.
  • an annular division part 31 (partition line) is formed.
  • the dividing portion 31 divides the hollow body 15 into a first divided body 32 on the first end wall portion 22 side and a second divided body 33 on the second end wall portion 23 side.
  • the dividing portion 31 is located closer to the second end wall portion 23 than the substrate pedestal portion 27 and the element pedestal portion 28.
  • the chamber member 16 is accommodated in the hollow body 15.
  • the chamber member 16 is formed in a flat top tube shape that opens toward the first end wall portion 22.
  • the chamber member 16 is formed in a circular shape (perfect circle shape) in a plan view of the chamber member 16.
  • the opening end portion of the chamber member 16 is disposed in the step portion 30 and is fixed to the element base portion 28.
  • the chamber member 16 forms an air chamber 34 between the first end wall portion 22 and the chamber member 16.
  • the air chamber 34 is formed by the chamber member 16, the first end wall portion 22, and the element base portion 28.
  • Piezoelectric element 17 converts pressure into voltage.
  • the piezoelectric element 17 converts the pressure received by the pressure receiving surface 17a into a voltage.
  • the piezoelectric element 17 is disposed in the hollow body 15 and is accommodated in the hollow body 15 in the present embodiment.
  • the piezoelectric element 17 is formed in a circular thin plate shape (film shape) whose surface faces the first end wall portion 22, and in the present embodiment, the surface is a pressure receiving surface 17a.
  • the diameter of the piezoelectric element 17 is, for example, about 15 mm.
  • the piezoelectric element 17 is assembled to the chamber member 16.
  • the piezoelectric element 17 is disposed in the chamber member 16.
  • the outer peripheral edge of the piezoelectric element 17 is fixed to the inner peripheral edge of the opening end of the chamber member 16 over the entire periphery.
  • the piezoelectric element 17 is inclined with respect to the first end wall portion 22.
  • the piezoelectric element 17 extends parallel to the surface of the element base 28 and is inclined with respect to the longitudinal direction X.
  • the piezoelectric element 17 closes the internal space of the element base portion 28 from the second end wall portion 23 side.
  • the pressure receiving surface 17 a faces the first end wall portion 22 through the inside of the element base portion 28.
  • the piezoelectric element 17 forms an input chamber 35 and a reference chamber 36 inside the hollow body 15.
  • the piezoelectric element 17 partitions the air chamber 34 into an input chamber 35 and a reference chamber 36.
  • the input chamber 35 and the reference chamber 36 are each sealed. In the input chamber 35, communication between the pressure receiving surface 17 a of the piezoelectric element 17 and the element pedestal portion 28 to the outside is blocked. In the reference chamber 36, communication between the outer peripheral edge of the piezoelectric element 17 and the inner peripheral edge of the chamber member 16 is blocked.
  • the input chamber 35 has the piezoelectric element 17 (pressure receiving surface 17a) as a part of the wall surface.
  • the input chamber 35 is formed by closing the inside of the element base 28 with the piezoelectric element 17.
  • the input chamber 35 is formed between the piezoelectric element 17 and the first end wall portion 22.
  • the reference chamber 36 is provided on the opposite side of the input chamber 35 with the piezoelectric element 17 interposed therebetween in the hollow body 15.
  • the reference chamber 36 is formed between the piezoelectric element 17 and the chamber member 16.
  • the substrate 20 is accommodated in the hollow body 15.
  • a piezoelectric element 17 is connected to the substrate 20.
  • a lead wire (not shown) extending from the piezoelectric element 17 is connected to the substrate 20.
  • the substrate 20 is disposed between the piezoelectric element 17 and the second end wall portion 23 in the hollow body 15.
  • the substrate 20 extends along the first end wall portion 22.
  • the substrate 20 is parallel to the first end wall portion 22 and the second end wall portion 23.
  • a protrusion 37 is disposed on the substrate 20.
  • the substrate 20 is a circuit board, and the protrusion 37 is, for example, an electronic component for arithmetic processing.
  • the protrusion 37 protrudes from the substrate 20 toward the first end wall portion 22 side.
  • a plurality of protrusions 37 are provided in the longitudinal direction X. The amount of protrusion of the plurality of protrusions 37 increases from the first side X1 toward the second side X2.
  • the substrate 20 (circuit board) forms an arithmetic processing unit 38.
  • the arithmetic processing unit 38 converts the voltage from the piezoelectric element 17 into an electric signal, and sends the electric signal as a measurement result to the information processing apparatus.
  • the substrate 20 is connected to the information processing apparatus via a cable (not shown).
  • the cable extends from the inside of the hollow body 15 to the outside through a portion of the dividing portion 31 in the circumferential direction.
  • the arithmetic processing unit 38 may filter noise in the voltage converted by the piezoelectric element 17.
  • the noise is a voltage based on vibration in a certain frequency region that is input to the pressure receiving unit 11. Examples of the constant frequency region include a high frequency region of 300 Hz or higher. This type of noise can be generated by rubbing the surface of the pressure receiving portion 11, for example.
  • a connector board not having the arithmetic processing unit 38 may be employed instead of the circuit board having the arithmetic processing unit 38 as the substrate 20, a connector board not having the arithmetic processing unit 38 may be employed.
  • a circuit board (arithmetic processing unit 38) can be separately provided outside, and the piezoelectric element 17 can be connected to an external circuit board via the connector board. At this time, it is possible to connect the connector board and the circuit board via a shield wire.
  • the protrusion 37 is, for example, a connector.
  • the communication part 18 can communicate the inside of the reference chamber 36 and the outside of the hollow body 15.
  • the communication unit 18 can open the sealed reference chamber 36 to the outside.
  • the communication unit 18 includes a first communication unit 39, a second communication unit 40, and a third communication unit (not shown).
  • the first communication part 39 is provided in the chamber member 16.
  • the first communication part 39 is a through hole that penetrates the chamber member 16.
  • the first communication portion 39 is disposed at the central portion of the top wall portion of the chamber member 16.
  • the second communication part 40 is provided inside the hollow body 15.
  • the second communication portion 40 is formed by a space between the element base portion 28, the first end wall portion 22, the peripheral wall portion 24, and the second end wall portion 23.
  • the substrate 20 is disposed in the second communication part 40.
  • the third communication portion is provided between the first divided body 32 and the second divided body 33.
  • the third communication part is provided in a part of the dividing part 31 through which the cable passes.
  • the third communication part is formed by a gap provided between the hollow body 15 and the cable.
  • the blocking unit 19 blocks communication between the inside of the reference chamber 36 and the outside of the hollow body 15 through the communication unit 18.
  • the blocking part 19 closes the first communication part 39.
  • the blocking unit 19 is a film attached to the chamber member 16.
  • the blocking portion 19 is attached to the chamber member 16 from the side opposite to the reference chamber 36 (second communication portion 40 side).
  • the introduction part 21 is provided in the hollow body 15 and communicates with the input chamber 35.
  • the introduction part 21 can open the sealed input chamber 35 to the outside.
  • the introduction part 21 introduces air into the input chamber 35 in a direction inclined with respect to the piezoelectric element 17 (pressure receiving surface 17a).
  • the tilting direction includes a direction parallel to the piezoelectric element 17 (pressure receiving surface 17a) and does not include the perpendicular P direction of the piezoelectric element 17 (pressure receiving surface 17a).
  • the introduction portion 21 introduces air into the input chamber 35 in the inclined direction (except for the direction parallel to the piezoelectric element 17).
  • the introduction part 21 is provided in the peripheral wall part 24.
  • the introduction part 21 penetrates the hollow body 15.
  • the introduction part 21 introduces air into the input chamber 35 toward the central part of the piezoelectric element 17.
  • the introduction part 21 is formed by a member separate from the hollow body 15.
  • the introduction part 21 is a tubular body.
  • the axis O of the introduction portion 21 extends in the longitudinal direction X, and extends in parallel with the first end wall portion 22 in the illustrated example.
  • the axis O passes through the central portion of the pressure receiving surface 17a and is inclined with respect to the pressure receiving surface 17a and the perpendicular P.
  • the inclination angle ⁇ between the axis O and the pressure receiving surface 17a is, for example, 45 ° or less.
  • the inclination angle ⁇ is greater than 0 ° and not greater than 45 °, for example, not less than 10 ° and not greater than 20 °.
  • the introducing portion 21 integrally penetrates the connecting side wall portion 26a and the end portion on the first side X1 of the element base portion 28.
  • the end of the introduction part 21 on the first side X1 protrudes from the hollow body 15 to the first side X1.
  • the end portion on the second side X ⁇ b> 2 of the introduction portion 21 does not protrude into the input chamber 35.
  • the end surface on the second side X ⁇ b> 2 of the introduction portion 21 is disposed at a position equivalent to the inner peripheral surface (the inner surface of the input chamber 35) of the element base portion 28 in the longitudinal direction X.
  • the connecting pipe 13 communicates the pressure receiving part 11 and the introducing part 21.
  • the connection pipe 13 introduces air from the pressure receiving part 11 into the introduction part 21.
  • the inner diameter of the introduction part 21 and the inner diameter of the connecting pipe 13 are each 2 mm or less, for example.
  • the pressure receiving unit 11 pumps air (sends pressure) to the introduction unit 21.
  • the pressure receiving part 11 is not deformed with a change in pressure (external pressure) outside the hollow body 15, and the pressure receiving part 11 is substantially not affected by the external pressure fluctuation. Therefore, the input chamber 35 is not substantially affected by fluctuations in the external pressure.
  • the introduction unit 21 introduces air into the input chamber 35 in the inclined direction. Therefore, for example, compared with the case where the introduction unit 21 introduces air into the input chamber 35 in the direction of the perpendicular P, the piezoelectric element 17 is directly connected to the air introduced into the input chamber 35 through the introduction unit 21. It is possible to keep the pressure applied to the surface small.
  • the introduction unit 21 when the introduction unit 21 introduces air into the input chamber 35 in the direction of the perpendicular line P, the piezoelectric element 17 and the piezoelectric element 17 are used in order to reduce the pressure that the piezoelectric element 17 directly receives from the air. It can also be considered that the introduction part 21 is separated. On the other hand, when the introduction part 21 introduces air into the input chamber 35 in the inclined direction, the pressure can be kept small after the piezoelectric element 17 and the introduction part 21 are brought close to each other.
  • the small pressure fluctuation which arises in a to-be-measured body can be measured with high precision, aiming at size reduction.
  • the introduction part 21 introduces air into the input chamber 35 toward the central part of the piezoelectric element 17, it is possible to accurately measure minute pressure fluctuations occurring in the measurement target and to ensure good measurement sensitivity. be able to.
  • the piezoelectric element 17 forms a reference chamber 36 on the opposite side of the input chamber 35 with the piezoelectric element 17 interposed therebetween in the hollow body 15. Therefore, when air is introduced into the input chamber 35 through the introducing portion 21, the piezoelectric element 17 can be deformed based on the pressure difference between the input chamber 35 and the reference chamber 36. Thereby, it is possible to measure a minute pressure fluctuation generated in the measurement object with higher accuracy.
  • the reference chamber 36 is formed between the piezoelectric element 17 and the chamber member 16, the degree of freedom in designing the reference chamber 36 can be easily increased.
  • the hollow body 15 includes both end wall portions 22 and 23 and a peripheral wall portion 24. Thereby, it becomes possible to make it easy to hold
  • the piezoelectric element 17 is inclined with respect to the first end wall portion 22. Therefore, for example, a larger piezoelectric element 17 can be disposed in the hollow body 15 than when the piezoelectric element 17 is disposed in parallel to the first end wall portion 22. Thereby, it becomes possible to make the sensitivity of the piezoelectric element 17 easy to increase, and minute pressure fluctuations generated in the measurement object can be measured with higher accuracy.
  • the piezoelectric element 17 is inclined with respect to the first end wall portion 22.
  • the end portion on the second side X2 of the piezoelectric element 17 is closer to the first end wall portion 22 than the end portion on the first side X1.
  • a wide space can be secured between the end portion of the second side X ⁇ b> 2 of the piezoelectric element 17 and the substrate 20.
  • the substrate 20 extends along the first end wall portion 22. Therefore, by arranging the protrusions 37 arranged on the substrate 20 in the wide space, the substrate 20 and the second end wall portion 23 can be brought close to each other. Thereby, it is possible to shorten the distance between the both end wall portions 22 and 23 while arranging the substrate 20 in the hollow body 15, and the pressure detection device 12 can be reliably reduced in size.
  • the introduction part 21 is provided in the peripheral wall part 24. Therefore, when the hollow body 15 is gripped so as to sandwich the both end wall portions 22 and 23, or when the first end wall portion 22 or the second end wall portion 23 is installed on the installation surface, the introduction portion 21 becomes an obstacle. Can be suppressed. Thereby, the handleability of the pressure detection device 12 can be further improved.
  • the pressure outside the hollow body 15 may vary depending on the use environment of the pressure detection device 12.
  • the external pressure may fluctuate slightly by opening and closing the door.
  • the input chamber 35 may be affected by external pressure fluctuations through the introduction part 21.
  • the reference chamber 36 is not similarly affected by fluctuations in external pressure, the measurement accuracy may be reduced.
  • the inside of the reference chamber 36 and the outside of the hollow body 15 can communicate with each other through the communicating portion 18. Therefore, unlike the present embodiment, when the input chamber 35 (pressure receiving portion 11) is affected by external pressure fluctuations, the blocking portion 19 is excluded and the inside of the reference chamber 36 and the outside of the hollow body 15 are passed through the communicating portion 18. , The reference chamber 36 can be similarly affected through the communication portion 18. As a result, the in-phase component of pressure fluctuation can be canceled. On the other hand, when the input chamber 35 (pressure receiving portion 11) is not affected by fluctuations in external pressure as in the present embodiment, the communication portion 18 is passed through so that the reference chamber 36 is not affected by the above-described influence.
  • the pressure receiving portion 11 As the pressure receiving portion 11, a configuration different from that of the air pad can be adopted. For example, you may employ
  • the introduction unit 21 may not introduce air into the input chamber 35 toward the center of the piezoelectric element 17.
  • the introduction unit 21 may introduce air into the input chamber 35 toward the outer peripheral edge of the piezoelectric element 17, or may not introduce air toward the piezoelectric element 17.
  • the axis O may pass through the outer peripheral edge of the pressure receiving surface 17a or may not pass through the pressure receiving surface 17a.
  • the introduction part 21 may not be a tubular body.
  • the introduction part 21 may be a passage formed in the hollow body 15.
  • the introduction part 21 may be provided in the first end wall part 22 or the second end wall part 23.
  • the substrate 20 may not be accommodated in the hollow body 15.
  • the blocking unit 19 and the communication unit 18 may not be provided.
  • the chamber member 16 may not be provided.
  • a space corresponding to the second communication unit 40 in the pressure detection device 12 may be used as the reference chamber 36.
  • the hollow body 15 may not include the first end wall portion 22, the second end wall portion 23, and the peripheral wall portion 24.
  • the hollow body 15 may be configured only by the first end wall portion 22 and the element base portion 28. In this case, a configuration in which the chamber member 16 or the piezoelectric element 17 is exposed outside without being accommodated in the hollow body 15 can be employed.
  • the industrial applicability is great.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Dentistry (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Physiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

La présente invention concerne un dispositif de détection de pression qui est pourvu de : un élément piézoélectrique ; un corps creux qui est pourvu d'une chambre d'entrée comportant l'élément piézoélectrique en tant que partie de la surface de paroi de celle-ci ; et une section d'introduction, qui est disposée sur le corps creux et qui est en communication avec l'intérieur de la chambre d'entrée, ladite section d'introduction introduisant de l'air dans la chambre d'entrée dans la direction inclinée par rapport à l'élément piézoélectrique.
PCT/JP2017/020430 2016-06-03 2017-06-01 Dispositif de détection de pression et système de mesure d'informations biologiques WO2017209239A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780017225.XA CN109154534B (zh) 2016-06-03 2017-06-01 压力检测装置及生物信息计量系统

Applications Claiming Priority (2)

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JP2016111911A JP6612682B2 (ja) 2016-06-03 2016-06-03 圧力検出装置および生体情報計測システム
JP2016-111911 2016-06-03

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WO2017209239A1 true WO2017209239A1 (fr) 2017-12-07

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022138609A1 (fr) * 2020-12-25 2022-06-30 株式会社リキッド・デザイン・システムズ Capteur de pression, et dispositif de mesure d'informations biométriques

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62121530U (fr) * 1986-01-23 1987-08-01
JPH09229801A (ja) * 1996-02-26 1997-09-05 Matsushita Electric Works Ltd 半導体圧力センサ
JPH10332512A (ja) * 1997-06-03 1998-12-18 Osaka Gas Co Ltd 差圧センサ、流量測定装置及び流量測定方法
JP2004113618A (ja) * 2002-09-27 2004-04-15 Tanita Corp 生体信号検出装置及びそれを利用した睡眠測定装置
JP2005110969A (ja) * 2003-10-08 2005-04-28 Yamatake Corp 生体情報計測装置
US8672853B2 (en) * 2010-06-15 2014-03-18 Bam Labs, Inc. Pressure sensor for monitoring a subject and pressure sensor with inflatable bladder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4389375B2 (ja) * 2000-01-18 2009-12-24 株式会社デンソー 圧力センサ
US9562820B2 (en) * 2013-02-28 2017-02-07 Mks Instruments, Inc. Pressure sensor with real time health monitoring and compensation
JP6275431B2 (ja) * 2013-09-18 2018-02-07 アルプス電気株式会社 圧力検知装置およびこれを使用した吸気圧測定装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62121530U (fr) * 1986-01-23 1987-08-01
JPH09229801A (ja) * 1996-02-26 1997-09-05 Matsushita Electric Works Ltd 半導体圧力センサ
JPH10332512A (ja) * 1997-06-03 1998-12-18 Osaka Gas Co Ltd 差圧センサ、流量測定装置及び流量測定方法
JP2004113618A (ja) * 2002-09-27 2004-04-15 Tanita Corp 生体信号検出装置及びそれを利用した睡眠測定装置
JP2005110969A (ja) * 2003-10-08 2005-04-28 Yamatake Corp 生体情報計測装置
US8672853B2 (en) * 2010-06-15 2014-03-18 Bam Labs, Inc. Pressure sensor for monitoring a subject and pressure sensor with inflatable bladder

Also Published As

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CN109154534A (zh) 2019-01-04
JP2017219341A (ja) 2017-12-14
CN109154534B (zh) 2020-07-14
JP6612682B2 (ja) 2019-11-27

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