TW201825908A - Vibration waveform sensor and waveform analysis device for continuously measuring and analyzing the acceleration waveform of vibration while keeping the power consumption low - Google Patents

Abstract

The object of the present invention is to continuously measure and analyze the acceleration waveform of vibration while keeping the power consumption low. In the present invention, a sensor module 10 is provided with a structure having a vibration ring 40 adopted to cover a piezoelectric element 30 placed on the principal face of a substrate 20, and is installed in an appropriate position on the arm, neck and the like of a human body by using a medical fixing tape and the like in a manner that the vibration ring 40 abuts against the skin BD of the human body. If a pulse wave is transmitted from the skin to the vibration ring 40 for vibrating the substrate 20, this vibration is transmitted to the piezoelectric element 30. Therefore, the piezoelectric element 30 is displaced and the vibration of the pulse wave is converted to an electrical signal. The electrical signal is amplified by an amplifier on the substrate 20 and inputted to a vibration analysis device 100, where a specific calculation is executed to perform waveform analysis, so that the vascular state and the like can be known from the pulse waveform.

Description

Vibration waveform sensor and waveform analysis device

The present invention relates to a vibration waveform sensor for improving measurement of various vibration waveforms such as pulses, and a waveform analysis device for analyzing obtained waveforms.

For example, a pulse oximeter is known as a pulse wave (waveform of a pulse) of a human body. Pulse oximeter uses the light absorption of LED (light-emitting diode) of hemoglobin in the blood in the blood vessel to detect the expansion of blood vessels caused by the vibration of the blood vessel wall. Thereby, the blood oxygen concentration or the volume waveform of the pulse can be obtained. As a prior art of a pulse oximeter, for example, there are those described in the following patent documents. [Prior Art Literature] [Patent Literature] Patent Literature 1: Japanese Patent Application Publication No. 2004-514116 Patent Literature 2: Japanese Patent Application Publication No. 2009-34427

[Problems to be Solved by the Invention] However, since the above-mentioned prior art is used by continuously outputting light from an LED, the power consumption is as large as m W, and therefore, continuous measurement is not suitable as a wearable device. Moreover, although the volume waveform of the pulse wave is obtained, it cannot be said that the resolution is necessarily high enough. On the other hand, if the pulse acceleration waveform can be continuously measured, the state or pressure of arteriosclerosis can be known, and furthermore, it is very convenient to grasp the changes in the vascular state of patients during or after surgery, or after administration. However, in order to detect the pulse and display the pulse wave, it is necessary to perform averaging, waveform shaping, and second-order differential calculation, and it also takes a considerable time (about 10 to 5 msec). The present invention has been made in view of the foregoing points, and an object thereof is to continuously measure a vibration waveform and further analyze the vibration waveform. Another object is to measure the vibration waveform well with low power consumption. Another object is to perform vibration waveform measurement as a wearable type. [Technical means to solve the problem] The vibration waveform sensor of the present invention is characterized by including: a circuit substrate; a piezoelectric element which is disposed on the circuit substrate and continuously measures the vibration of the circuit substrate to obtain a vibration waveform; and vibration introduction The body is in contact with the object and transmits its vibration to the circuit board. The vibration waveform sensor of another invention is characterized by comprising: a circuit board that transmits vibration; a piezoelectric element that is mounted on the circuit board and converts vibration transmitted from the circuit board into an electrical signal and outputs a waveform signal To obtain a vibration waveform; and a vibration introduction body that contacts the object, introduces its vibration, and transmits it to the circuit board. One of the main aspects is characterized in that the vibration introduction body is conductive. According to another aspect, a signal amplification mechanism is provided on the circuit board to amplify the waveform signal output from the piezoelectric element. According to another aspect, the vibration introduction body is a conductive ring, and has a resin that is filled with a space inside the ring and molded in such a manner as to bulge outside the ring. As still another aspect, the circuit board doubles as the vibration introduction body. As another aspect, the piezoelectric element has a shape in a longitudinal direction, and the piezoelectric element outputs the waveform signal mainly based on the displacement in the longitudinal direction. The waveform analysis device of the present invention is characterized in that a waveform analysis is performed by performing a preset operation on a vibration waveform obtained by any of the vibration waveform sensors described above. One of the main forms is characterized in that the above-mentioned vibration waveform is a waveform of a human pulse wave, and the wave height Pa of the positive wave in the early contraction period, the wave height Pb of the negative wave in the initial period of contraction, and the wave height in the middle period of the contraction again are detected from the waveform. Pc, the wave height Pd of the descending wave in the late contraction period, or the wave height Pe of the positive wave in the early expansion phase, and from these values, Pb / Pa, Pc / Pa, Pd / Pa, Pe / Pa, and (Pb-Pc-Pd -At least one of Pe) / Pa. As one of the other forms, it is characterized by including a noise removing mechanism that removes the noise as a noise when the peak value of the vibration waveform exceeds a predetermined threshold. As one of the other forms, it is characterized in that in the case where the vibration waveform is a pulse wave, it includes: a waveform analysis mechanism that performs specific calculations on each waveform component of the plurality of waveforms contained in the pulse wave; and detection of incomplete pulses A mechanism that detects a pulse irregularity from the pulse interval of the pulse wave; and an alarm mechanism that outputs an alarm when the calculation result of the waveform analysis mechanism exceeds a certain critical value, or when a pulse irregularity is detected by the pulse irregularity detection mechanism. The above and other objects, features, and advantages of the present invention will become apparent from the following detailed description and accompanying drawings. [Effects of the Invention] According to the present invention, since the vibration of the object is introduced by the vibration introduction body to the circuit board on which the piezoelectric element is mounted, the vibration waveform of the object can be measured with the piezoelectric element continuously and with low power consumption. , Suitable for small wearable machines.

Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples. Embodiment 1 First, an embodiment of a vibration waveform sensor according to the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 shows a case where the present invention is used as a pulse wave sensor. The figure (A) shows a cross-section of the sensor module 10, the figure (B) shows a disassembled state, and the figure (C) shows a state viewed from the bottom surface side. In these drawings, the sensor module 10 has a structure in which a piezoelectric element 30 is arranged on the main surface of the substrate 20, and the piezoelectric element 30 is covered with a vibration ring 40. In this embodiment, the piezoelectric element 30 is rectangular as shown in FIG. 1 (C) and has a longitudinal direction. In each of the above sections, the substrate 20 is used to fix and support the piezoelectric element 30, and to perform extraction or signal amplification of the electrode, and is formed of epoxy glass or ceramic. A pair of electrode pads 22 and 23 are provided on the main surface of the substrate 20 near the center, and a ground conductor 24 is formed around the pair of electrode pads. The electrode pads 22 and 23 are drawn out on the back side of the substrate 20 through the through holes 22A and 23A. A terminal (not shown) of the piezoelectric element 30 is bonded to the electrode pads 22 and 23 with a conductive adhesive or the like. As described above, the electrode pads 22 and 23 and the through holes 22A and 23A are connected to the piezoelectric element 30 through an amplifier (described later) and the like provided on the back side of the substrate 20. As the piezoelectric element 30, for example, PZT (lead zirconate titanate) is used. An insulating resin may be provided so as to cover the electrode pads 22 and 23. In this case, the piezoelectric element 30 may be covered with a resin. Next, a vibration ring 40 is provided on the piezoelectric element 30 so as to surround it, and the vibration ring 40 and the ground conductor 24 are electrically connected. The ground conductor 24 is led out to the rear surface side of the substrate 20 through the through holes 24A and 24B (only shown in FIG. 1 (A)). The vibrating ring 40 is made of, for example, stainless steel and has conductivity. The vibrating ring 40 has a ground potential in common with the skin of the human body in contact with the vibrating ring 40 and functions as a vibration introducing body that introduces the vibration of the skin to the substrate 20. The vibration of the skin is transmitted to the vibration ring 40, and is transmitted from the vibration ring 40 to the substrate 20. The substrate 20 also functions as a vibrating body, and transmits vibration transmitted from the vibrating ring 40 to the piezoelectric element 30. A cavity 41 is formed by the vibration ring 40. As shown in the above-mentioned sensor module 10, as shown in FIG. 2, the vibrating ring 40 is pressed against the skin BD of the human body by a medical fixing tape or the like at an appropriate position on the wrist or neck of the human body. Way to install. FIG. 2 (A) shows a case where it is mounted on a fingertip by a medical fixing tape 12, and FIG. 2 (B) shows a case where it is wound around a wrist by a hook and loop tape 14, and FIG. 2 (C) shows a case where When it is attached to the wrist by the medical fixing tape 16. Next, a basic operation of the sensor module 10 will be described with reference to FIG. 3. Figures 3 (A)-(C) show the transmission of pulse waves in blood vessels BV in the human body. The so-called pulse wave system changes the volume generated by the inflow of blood into a part of body tissue with the heart beat, and the body surface captures it as a waveform. In addition, in FIG. 3, the larger volume of the blood vessel BV is displayed as HP, and the pulse wave is transmitted from the left to the right. The pulse wave is transmitted to the vibration ring 40 of the sensor module 10 through the skin BD. The vibration system of the vibration ring 40 further vibrates the substrate 20 and transmits the vibration to the piezoelectric element 30. In this way, the piezoelectric element 30 is displaced, and the vibration of the pulse wave is converted into an electrical signal. This signal is amplified by an amplifier of the substrate 20 and output. The output waveform signal is mainly based on the displacement in the longitudinal direction (length direction) of the above-mentioned piezoelectric element 30. An example of the measured pulse wave is shown in Fig. 5 (A). The piezoelectric element 30 detects the acceleration of a pulse wave in nature. As described above, according to this embodiment, since the piezoelectric element 30 is mounted on the substrate 20 functioning as a vibrating body, and the vibration of the skin BD is transmitted to the substrate 20 by the vibration ring 40, the pulse wave HP can be detected well. In addition, since the piezoelectric element 30 is used, the acceleration pulse wave can be directly measured at a high resolution. Therefore, compared with the above-mentioned optical method such as a pulse oximeter, the second-order differential calculation is not required, and power consumption is low. And also has the advantage of continuous measurement of pulse wave HP. Furthermore, since the vibration ring 40 is set at the same potential as the skin BD and at the ground potential, the influence of noise is reduced. In addition, in this embodiment, although it is described as detecting the acceleration of the pulse wave, it is assumed that if the "velocity pulse wave" is detected, the calculation can be performed relatively simply using only the first-order differential calculation. [Embodiment 2] Next, a waveform analysis system using the sensor module 10 will be described with reference to Figs. 4 to 7. The overall structure is shown in FIG. 4 (A). The sensor module 10 is connected to the motherboard 50. The motherboard 50 is connected to the waveform analysis via a USB (Universal Serial Bus) hardware lock 60 for wireless communication.装置 100。 The device 100. The circuit configuration of each part is shown in FIG. 4 (B). In the sensor module 10, the output side of the above-mentioned piezoelectric element 30 is connected to the input side of an instrumentation amplifier (action amplifier with high input impedance) 26 provided on the back side of the substrate 20. The output of the instrumentation amplifier 26 is the sensor The output of the tester module 10 is connected to the input side of the motherboard 50. A programmable amplifier 52 is provided on an input side of the motherboard 50, and an output side thereof is connected to the transmitting module 54 via an A / D converter 53. That is, the waveform signal of the pulse wave amplified by the programmable amplifier 52 is converted into a digital signal by the A / D converter 53 and transmitted from the transmitting module 54. As the transmission module 54, various known short-range wireless communication specifications corresponding to radio waves or infrared rays can be used. For example, a specification such as BLE (Bluetooth (registered trademark) Low Energy) capable of communicating with low power is used. A power source 58 such as a button battery is provided on the main board 50, and power for driving is supplied to each part of the main board 50, and driving power is also supplied to the sensor module 10. The USB hardware lock 60 is a waveform analysis device 100 for capturing signals sent from the above-mentioned motherboard 50, and includes a receiving module 62 and a USB interface 64. In addition, if the waveform analysis device 100 can directly receive signals sent from the above-mentioned motherboard 50, the USB hardware lock 60 is not required. In addition, the USB hardware lock 60 is also used to control the operation of the motherboard 50 by the waveform analysis device 100. Next, the waveform analysis device 100 is composed of a PC (computer), a smart phone, a tablet PC, and the like, and includes a CPU 102, a data memory 110, a program memory 120, and a display 104, as shown in FIG. 4 (C). The program stored in the program memory 120 is executed by the CPU 102. At this time, it is necessary to refer to the data stored in the data memory 110. The calculation result is stored in the data memory 110 and displayed on the display 104. Such basic actions are general and well known. In the data memory 110, the waveform data 112 received by the USB dongle 60 is stored. In addition, the calculation result 114 which is the calculation result of the CPU 102 is also stored. The program memory 120 is provided with a noise removal program 122, a waveform analysis program 124, an incomplete pulse detection program 126, and an alarm program 128. For smartphones, prepare these programs as applications. Among these, the noise removal program 122 is a program for removing noise included in the waveform data 112, and when the peak value of the pulse wave exceeds a preset threshold value, it is determined that external interference has occurred, and the waveform is Perform peak hold to perform signal processing to reduce the influence of external interference. The waveform analysis program 124 performs Pb / Pa, Pc / Pa, Pd / Pa, Pe / Pa, and (Pb-Pc-Pd-) on Pa-Pe (refer to FIG. 5 (A)) included in the waveform of the pulse wave. Pe) / Pa (Aging Index) and other analytical values. The incomplete pulse detection program 126 detects a missing pulse as an incomplete pulse from the pulse interval of the pulse wave. The alarm program 128 outputs the intention as an alarm when the analysis result of the waveform analysis program 124 exceeds a preset threshold value, when an irregular pulse is detected by the irregular pulse detection program 126, and the like. An example of an acceleration pulse is shown in FIG. 5 (A). The horizontal axis of the figure is time, and the vertical axis is the amplitude of the pulse wave detected by the piezoelectric element 30. The figure (B) is a magnified pulse waveform of the figure (A). In this embodiment, Pa to Pe are detected, and these are calculated by the waveform analysis program 124. As shown in the figure (C), the driving wave pressure is applied to the blood vessel BV from the heart side and the reflected wave pressure is applied from the opposite direction. Therefore, these multiplications become the pulse wave of the figure (B). The meaning of Pa ～ Pe wave is as follows: Pa wave: positive wave in early contraction (frontal component of systolic volume pulse wave) Pb wave: negative wave in early contraction (ibid.) Pc wave: re-rising wave in middle contraction (finger volume pulse) Rear component of the systolic phase of the wave) Pd wave: the descending wave in the late stage of systole (same as above) Pe wave: the positive wave in the early stage of expansion (the expansion phase component of the finger volume pulse) The wave analysis program 124 calculates the acceleration pulse The average waveform uses the wave height components of the multiple waveforms contained in the acceleration pulse wave to perform wave height ratios Pb / Pa, Pc / Pa, Pd / Pa, Pe / Pa, or (Pb-Pc-Pd-Pe) / Pa, etc. . The significance of the above calculation results is described in the following documents: a. Takazawa et al, "Assessment of Vasoactive Agents and Vascular Aging by the Second Derivative of Photoplethsmogram Waveform" Hypertension., August 1998 b. Junichiro Hashimoto et al, "Pulse wave velocity and the second derivative of the finger photoplethysmogram in treated hypertensive patients: their relationship and associating factors "Journal of Hypertension 2002, Vol 20 No 12 Next, the figure (D) shows an example of an irregular pulse, which should be shown by arrow F5 The pulse at the position does not exist. It is detected by the irregular pulse detection program 126. As an example of the setting menu displayed on the display 104 of the waveform analysis device 100 shown in FIG. 6, a graph to be displayed, an output method for selecting an alarm, and a threshold value can be selected. Next, the overall operation of this embodiment will be described. The pulse wave signal output from the piezoelectric element 30 is amplified by the instrumentation amplifier 26 and input to the main board 50. In the motherboard 50, the signal is further amplified by the programmable amplifier 52, converted into a digital signal by the A / D converter 53, and then sent from the sending module 54. The transmitted pulse wave signal is received by the receiving module 62 of the USB hardware lock 60, and is input to the waveform analysis device 100 from the USB interface 64. In the waveform analysis device 100, input data is stored in the data memory 110 as waveform data 112. When the noise removal program 122 is executed by the CPU 102, if there is external interference exceeding the preset threshold value with respect to the waveform data 112, the waveform is peak-held to remove noise. When the waveform analysis program 124 is executed by the CPU 102, Pa to Pe waves are detected from the waveform, and the above-mentioned Pb / Pa, Pc / Pa, Pd / Pa, Pe / Pa, (Pb-Pc-Pd-Pe) / Pa, etc. are performed. For the calculation, the calculation result is stored in the data memory 110 as the calculation data 114 and displayed on the display 104 at the same time. In addition, the CPU 102 executes the malformed pulse detection program 126 to detect malformed pulses. Furthermore, when the above-mentioned calculation result exceeds a critical value, or an irregular pulse is detected, the alarm program 128 outputs the alarm of that purpose with light or sound. An example of the display on the display 104 is shown in FIG. 7. The average of each calculation result is displayed in the upper section. In addition, "P.R." represents the pulse rate, and "A.I." represents the aging index value. In the middle section, the calculation results are displayed as graphs GA to GF. Graph GA indicates PR value, graph GB indicates Pb / Pa, graph GC indicates Pc / Pa, graph GD indicates Pd / Pa, graph GE indicates Pe / Pa, and graph GF indicates (Pb-Pc-Pd-Pe) / Pa change. . In the lower section of the display 104, the waveform G of the pulse wave is displayed in real time. By referring to the graph of such analytical values, the hardness of the blood vessels (the degree of arteriosclerosis) can be known, and further information such as the detection of mental states such as stress or pain, and the presence or absence of circulatory organ failure can be obtained. As described above, according to this embodiment, a. The measured pulse wave can be measured with high sensitivity, and the analytical value of the pulse wave can be calculated and displayed. b. Immediately grasp the changes in the vascular status of patients during or after surgery, or after administration, and can take appropriate treatment. c. Keep the peak value of the signal above the critical value, which can effectively reduce the influence of noise. d. When an irregular pulse is generated or an analysis value is abnormal, an alarm is output, so corrective measures can be taken. Embodiment 3 Next, Embodiment 3 of the present invention will be described with reference to FIG. 8. This embodiment is an example in which the above-mentioned sensor module 10 is used in a breath sensing device 200 of a driver driving a car. As shown in the figure (A), the driver seated in the driver's seat 202 of the car is equipped with a seat belt 204, and is provided so as to sandwich a sensing pad (airbag) 206 at the position of his chest. And, the sensing pad 206 is connected to the sensor module 10 through a tube 208. As shown in FIG. 1, in the sensor module 10, since the cavity 41 is formed at the piezoelectric element 30 by the vibration ring 40, the change in the internal pressure of the sensing pad 206 is transmitted to the cavity 41. When the driver breathes, since the sensing pad 206 is sandwiched between the driver and the seat belt 204, the sensing pad 206 repeatedly contracts and expands with the breathing. If it is transmitted to the cavity 41 of the sensor module 10 through the tube 208, the piezoelectric element 30 vibrates to obtain a waveform of respiration. An example of a breathing waveform is shown in FIG. 8 (B). From this breathing waveform, the driver's nervousness can be known. In addition, in the above description, the sensing pad 206 is attached to the seat belt 204, but it may also be attached to the clothes of the human body by a belt or the like. Embodiment 4 Next, Embodiment 4 of the present invention will be described with reference to FIG. 9. This embodiment is an example in which the above-mentioned sensor module 10 is used in a seat-sensing device 300 of a driver driving a car. As shown in the figure (A), a seat belt sensing pad 301 and a plurality of seat sensing pads 302 to 306 are provided on the seat 320 of the automobile. The seat belt sensing pad 301 is provided on the seat belt 328, and the seat sensing pad 302 is provided on the headrest 326. The seat sensing pads 303 and 304 are provided on the seat back 322, and the seat sensing pads 305 and 306 are provided on the seat surface 324. Each of the sensing pads 301 to 306 is connected to the chamber 41 of the sensor module 10 through the tubes 311 to 316 as shown in FIG. 9 (B), and comes from each of the main boards of each sensor module 10 The 50 signal is input to the waveform analysis device 100 via the USB dongle 60. In the waveform analysis device 100, the measurement results of each of the sensing pads 301 to 306 are displayed as G1 to G6. You can learn about the sitting posture from these charts. Embodiment 5 Next, Embodiment 5 of the present invention will be described with reference to FIG. 10. In the above embodiment, the cavity 41 of the sensor module 10 is set as a space, but in the sensor module 400 shown in FIG. 10 (A), the cavity portion is filled with a resin mold 402 . The surface of the resin mold 402 becomes a bulged portion 402A, and is formed so as to bulge slightly from the vibration ring 40. Thereby, an air layer is prevented from being formed between the object such as the skin, and the contact between the vibration ring 40 and the object is mitigated. The sensor module 410 shown in the figure (B) is an example in which a vibrating plate (or a vibrating rod) 412 is erected on the substrate 20, a piezoelectric element 30 is arranged near the substrate 20, and a resin mold 414 is covered. As shown in this example, if the vibration plate 412 contacts an object and transmits the vibration to the substrate 20, the vibration plate 412 may have any shape. The sensor module 420 in the figure (C) is an example in which the sensor module 420 is installed in an electronic device such as a smart phone or a tablet PC. The sensor module 420 is fixed in a manner that the vibration ring 432 on the substrate 430 is exposed from the frame 422 of the electronic device through the waterproof and dust-proof sheet 434. The substrate 430 is oscillatedly supported by the solder bump 426 relative to the mother board 424 of the electronic device. The vibration waveform signal of the sensor module 420 is captured by a circuit on the motherboard 424. The present invention is not limited to the above-mentioned embodiments, and various changes can be made without departing from the scope of the present invention. For example, the following are also included. (1) In the above-mentioned embodiments, although pulse waves, respiration, and the like are used as measurement targets, various waveforms may be used as targets. For example, analyze the vibration waveform of an engine or a motor. (2) In the above-mentioned embodiment, although the sensor module and the main board are separated, the two may be integrated, or a configuration in which the waveform analysis device is also integrated may be adopted. Also, in the above embodiment, although a USB hardware lock is used for transmission and reception via BLE, as long as the waveform analysis device has a function capable of transmitting and receiving signals between the motherboard and the motherboard, the USB hardware lock is not required. In addition, the transmission and reception of signals are not limited to BLE, and various specifications can be used. (3) The calculation formula of the waveform analysis shown in the above embodiment is also an example, and various calculations can be performed as required. (4) In the above embodiment, although the piezoelectric element 30 and the vibrating ring 40 are disposed on the same surface of the substrate 20, they may be disposed on different surfaces. (5) In the above-mentioned embodiment, although the vibration introduction body is provided separately from the circuit board, this is also an example, and the circuit board may also be configured as a vibration introduction body. That is, even if a configuration is adopted in which a part of the circuit board is brought into contact with the object, the vibration of the object is transmitted to the circuit board, and the vibration is transmitted to the piezoelectric element provided on the circuit board, it is possible to obtain the same as in the above embodiment. effect. (6) In the first embodiment, stainless steel is used as the material of the vibrating ring 40 as an example, but this is also an example, and other known conductive materials may be used. In addition, it is not necessary to form the entire vibration ring 40 with a conductive material, and for example, a conductive material may be applied to a ring made of plastic. (8) In the above embodiment, although the piezoelectric element 30 is rectangular, and outputs a waveform signal mainly based on the displacement in the longitudinal direction (length direction), this is also an example. For example, as long as the piezoelectric element has a shape having a length direction such as an ellipse, it can output a waveform signal mainly based on the displacement in the length direction. (9) In the above-mentioned embodiment, although the present invention is applied to the measurement of the pulse wave of a human body, it may of course be an animal. In addition, even if there is body hair and it is sandwiched by the vibration ring, it is possible to introduce vibration into the vibration ring and measure the vibration waveform well. (10) Furthermore, the measurement object may not be a living thing but a structure or a machine. Before a structure or machine fails or is damaged, most of them generate low-frequency vibrations that are different from usual. For example, a non-destructive inspection of a structure or a machine can be performed by using a vibrator or the like to provide external vibration of a certain frequency from the outside, and detecting low-frequency vibration with the sensor. In this case, when the object to be measured includes steel or the like, a magnetic ring mounted on the sensor can be used as a vibrating ring. The piezoelectric element may be configured to measure a change in air pressure in a cavity formed between the piezoelectric element and the vibration introducing body as a vibration waveform. [Industrial Applicability] According to the present invention, since a vibration waveform is measured using a sensor module of a piezoelectric element, an acceleration waveform can be continuously obtained and waveform analysis can be performed, which is suitable for medical treatment such as pulse wave or breathing measurement. Fields, etc.

10‧‧‧ Sensor Module

12‧‧‧ Medical Fixing Tape

14‧‧‧ Velcro

16‧‧‧ Medical Fixing Tape

20‧‧‧ substrate

22‧‧‧ electrode pads

22A‧‧‧through hole

23‧‧‧ electrode pads

23A‧‧‧through hole

24‧‧‧ ground conductor

24A‧‧‧through hole

24B‧‧‧through hole

26‧‧‧ Instrumentation Amplifier

30‧‧‧Piezoelectric element

40‧‧‧Vibration ring

41‧‧‧ chamber

50‧‧‧ Motherboard

52‧‧‧ Programmable Amplifier

53‧‧‧A / D converter

54‧‧‧ sending module

58‧‧‧Power

60‧‧‧USB Hardware Lock

62‧‧‧Receiving module

64‧‧‧ interface

100‧‧‧Waveform analysis device

102‧‧‧CPU

104‧‧‧Display

110‧‧‧data memory

112‧‧‧Waveform

114‧‧‧Computational data

120‧‧‧program memory

122‧‧‧Noise Removal Program

124‧‧‧Waveform Analysis Program

126‧‧‧Incomplete pulse detection program

128‧‧‧Alarm program

200‧‧‧Respiration sensing device

202‧‧‧Driver seat

204‧‧‧ Safety belt

206‧‧‧Sensing Pad

208‧‧‧tube

300‧‧‧Sitting sensing device

301‧‧‧Sensor pads for seat belts

302‧‧‧Seat Sensing Pad

303‧‧‧Seat Sensing Pad

304‧‧‧Seat Sensing Pad

305‧‧‧Seat Sensing Pad

306‧‧‧Seat Sensing Pad

311‧‧‧tube

312‧‧‧tube

313‧‧‧tube

314‧‧‧tube

315‧‧‧tube

316‧‧‧tube

320‧‧‧ seats

322‧‧‧back

324‧‧‧Seat

326‧‧‧Headrest

328‧‧‧Safety Belt

400‧‧‧ Sensor Module

402‧‧‧resin mould

402A‧‧‧bulge

410‧‧‧Sensor Module

412‧‧‧Vibration plate

414‧‧‧resin mould

420‧‧‧Sensor Module

422‧‧‧Frame

424‧‧‧Motherboard

426‧‧‧solder bump

430‧‧‧ substrate

432‧‧‧Vibration ring

434‧‧‧Waterproof and dustproof sheet

BD‧‧‧Skin

BLE‧‧‧Bluetooth Low Energy

BV‧‧‧Vessels

F5‧‧‧arrow

G1‧‧‧Measurement result

G2‧‧‧Measurement result

G3‧‧‧Measurement result

G4‧‧‧Measurement result

G5‧‧‧Measurement result

G6‧‧‧Measurement result

HP‧‧‧ Pulse

FIG. 1 is a diagram showing a sensor module according to the first embodiment of the present invention. (A) is a sectional view, (B) is an assembly drawing, and (C) is a view viewed from the side of the main surface. 2 (A)-(C) are diagrams showing a state in which the sensor module of the first embodiment is mounted on a human finger or a wrist. 3 (A)-(C) are diagrams showing the behavior of the pulse and the vibration of the skin. Fig. 4 is a diagram showing the structure of a second embodiment of the present invention. (A) shows the overall device structure, and (B) and (C) show the circuit structure. 5 (A) to (D) are diagrams showing an example of pulse waves measured. FIG. 6 is a diagram showing an example of a setting menu of the waveform analysis device of the second embodiment. FIG. 7 is a diagram showing a display example of the analysis result of the waveform analysis device of the second embodiment. FIG. 8 is a diagram showing a third embodiment in which the present invention is applied to a respiratory sensor. (A) is a display configuration, and (B) is a waveform example of a measurement. FIG. 9 is a diagram showing Embodiment 4 in which the present invention is applied to a sitting sensor. (A) is a configuration example of a display sensor, and (B) is a display device configuration. Fig. 10 is a diagram showing a fifth embodiment of the present invention. (A) and (B) are another configuration examples of the display sensor module, and (C) is an installation example of the display sensor module.

Claims (11)

A vibration waveform sensor, comprising: a circuit substrate; a piezoelectric element disposed on the circuit substrate and continuously measuring the vibration of the circuit substrate to obtain a vibration waveform; and a vibration introduction body that contacts an object, The vibration is transmitted to the circuit board. A vibration waveform sensor includes: a circuit substrate that transmits vibration; a piezoelectric element that is mounted on the circuit substrate and converts vibration transmitted from the circuit substrate into an electrical signal and outputs a waveform signal to obtain A vibration waveform; and a vibration introducing body that contacts the object, introduces its vibration, and transmits the vibration to the circuit board. The vibration waveform sensor according to the above-mentioned claim 1 or 2, wherein the vibration introduction body is conductive. The vibration waveform sensor according to any one of claims 1 to 3, wherein a signal amplification mechanism for amplifying the waveform signal output from the piezoelectric element is provided on the circuit substrate. The vibration waveform sensor according to any one of claims 1 to 4, wherein the vibration introduction body is a conductive ring, has a space filled in the ring, and is molded in such a manner as to bulge out of the ring. The resin. The vibration waveform sensor according to any one of claims 1 to 5, wherein the circuit board doubles as the vibration introduction body. The vibration waveform sensor according to any one of the above claims 1 to 6, wherein the piezoelectric element has a shape in a length direction, and the piezoelectric element mainly outputs the waveform signal based on the displacement in the length direction. A waveform analysis device is characterized in that a predetermined waveform calculation is performed on a vibration waveform obtained by the vibration waveform sensor according to any one of claims 1 to 7, and a waveform analysis is performed. For example, the waveform analysis device of claim 8, wherein the vibration waveform is a waveform of a human body pulse wave, and the wave height Pa of the positive wave in the early contraction period, the wave height Pb of the negative wave in the initial period of contraction, and the wave height of the rising wave in the middle period of contraction are detected from the waveform Pc, the wave height Pd of the descending wave in the late contraction period, or the wave height Pe of the positive wave in the early expansion phase, and from these values, Pb / Pa, Pc / Pa, Pd / Pa, Pe / Pa, and (Pb-Pc-Pd -At least one of Pe) / Pa. For example, the waveform analysis device of claim 8 or 9 includes: a noise removing mechanism that removes the vibration waveform as a noise when a peak value of the vibration waveform exceeds a preset threshold. For example, the waveform analysis device of claim 8 or 9, in the case where the vibration waveform is a pulse wave, includes: a waveform analysis mechanism that performs a specific operation on each waveform component of the plurality of waveforms contained in the pulse wave; A mechanism that detects an irregular pulse from the pulse interval of the pulse wave; and an alarm mechanism that outputs an alarm when the operation result of the waveform analysis mechanism exceeds a certain critical value, or when an irregular pulse is detected by the irregular pulse detection mechanism.