A passive impact counter integrating power generation and sensing

Abstract

The invention discloses a power generation and sensing integrated passive impact counter, which relates to the technical field of mechanical impact counting, and comprises: a first resonant beam and a power generation piezoelectric element arranged thereon; a second resonant beam and a sensing piezoelectric element arranged thereon; a fixing mechanism connected to one end of the first resonant beam and the second resonant beam and formed in one piece, the first resonant beam and the second resonant beam are electrically short-circuited through the fixing mechanism, and the fixing mechanism is electrically grounded through a control switch; a power supply processing circuit electrically connected to the power generation piezoelectric element and converting the charge generated by the deformation of the piezoelectric power generation element into a voltage; a sensing signal processing circuit electrically connected to the sensing piezoelectric element and converting the charge generated by the deformation of the sensing piezoelectric element into a voltage and obtaining an impact signal of the voltage; a microcontroller electrically connected to the control switch, the power supply processing circuit, and the sensing signal processing circuit to complete the counting work; and reducing the size of the counter.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical impact counting, in particular to a power generation and sensor integrated passive impact counter. Background Art

[0002] The passive impact counter does not use an external power supply. It works by converting the kinetic energy generated by a specific impact of the mechanism into electrical energy. It can independently generate electricity during an impact and automatically and accurately record the number of impacts. The stored impact data can be read out through supporting equipment. The counter is installed in an appropriate position inside the impact mechanism device, which does not affect the performance of the mechanism or the operation of personnel. The passive impact counter does not require a power supply and has the characteristics of low cost, high reliability, long life, and easy and convenient installation.

[0003] The power generation module of the passive impact counter usually adopts the piezoelectric D31 mode. The principle of the impact power generation of the piezoelectric D31 mode is that the mass block generates inertial force under the impact acceleration to make the resonance beam vibrate and deform. The piezoelectric sheet attached to the surface of the resonance beam feels the same deformation, and the piezoelectric sheet deforms to generate charge. The adhesive surface of the piezoelectric sheet is connected to the resonance beam, and the resonance beam serves as an extraction electrode of the piezoelectric sheet. The other side of the piezoelectric sheet leads to an electrode through a wire. A piezoelectric sheet is attached to the upper and lower sides of the resonance beam, and the two piezoelectric sheets have opposite polarities, that is, the upper non-adhesive surface and the lower adhesive surface have the same polarity. When the resonance beam is deformed, such as bending downward, the upper piezoelectric sheet is subjected to tensile deformation (assuming that the non-adhesive surface is positive and the adhesive surface output is negative), and the lower piezoelectric sheet is subjected to compressive deformation (due to the opposite polarity of the piezoelectric sheets, the non-adhesive surface output is positive and the adhesive surface output is negative), so that the upper and lower sheets output the charge in parallel, which is the sum of the two sheets. The power generation and response frequency can be adjusted by changing the weight of the mass block, the thickness and length of the resonance beam.

[0004] In order to effectively identify whether the power generation is caused by the impact of the mechanism or other accidental impacts (to prevent misjudgment), it is necessary to use the signal generated by the impact of the mechanism for judgment. Usually, the acceleration judgment method is adopted. The impact acceleration amplitude, time, and waveform of the mechanism-specific impact acceleration and the impact acceleration of the accidental impact are obviously different. The impact acceleration amplitude, time, and waveform can be used for judgment. The resonant beam structure can be used to make a piezoelectric acceleration sensor, which has a small size, a large output amplitude, a large frequency response range, and does not require power supply. It is particularly suitable as a passive counter sensor module.

[0005] In order to ensure a certain amount of power generation, the natural frequency of the resonant beam should be close to the impact frequency of the mechanism to maximize the deformation of the resonant beam. If the intervals between the impacts of the mechanism are short, and the vibration of the resonant beam has not been significantly attenuated when the second impact comes, the resonant beam itself cannot be used as a sensing signal, and the sensing piezoelectric element must be separated from the power generation element. The higher the natural frequency of the sensing piezoelectric element, the faster the vibration attenuation. The natural frequency of the sensing piezoelectric element is higher than that of the power generation element, ensuring that the vibration attenuation of the sensing piezoelectric element is significantly reduced when the second impact comes. Both the sensing piezoelectric element and the power generation element include fixed support parts, resulting in a larger size of the counter. Summary of the invention

[0006] The purpose of the present invention is to solve the technical problem that both the sensing piezoelectric element and the generating element include a fixed support part, which leads to a larger counter size. The present invention provides a power generation and sensing integrated passive impact counter.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A power generation and sensing integrated passive impact counter, comprising:

[0009] A first resonant beam for sensing external vibration or acceleration and a piezoelectric element disposed thereon;

[0010] A second resonant beam for sensing external vibration or acceleration and a sensing piezoelectric element disposed thereon;

[0011] A fixing mechanism connected to one end of the first resonant beam and the second resonant beam and formed integrally, the first resonant beam and the second resonant beam are electrically short-circuited through the fixing mechanism, and the fixing mechanism is electrically grounded through a control switch;

[0012] A power processing circuit electrically connected to the power generation piezoelectric element and converting the charge generated by the deformation of the power generation piezoelectric element into a voltage;

[0013] A sensing signal processing circuit electrically connected to the sensing piezoelectric element, converting the charge generated by the deformation of the sensing piezoelectric element into a voltage and acquiring an impact signal of the voltage;

[0014] A microcontroller is electrically connected to the control switch, the power processing circuit, and the sensor signal processing circuit to complete the counting work.

[0015] Furthermore, the power processing circuit includes:

[0016] A charging capacitor for collecting and storing electric charge;

[0017] A rectifier bridge connected in series between the charging capacitor and the power generation area so that the charging capacitor collects the stored charge;

[0018] A voltage stabilizing module connected in series between the charging capacitor and the microcontroller to provide a stable voltage for the microcontroller;

[0019] The TVS tube connected in parallel between the charging capacitor and the voltage stabilizing module is used to protect the charging capacitor and the voltage stabilizing module that store charge.

[0020] Furthermore, the sensor signal processing circuit includes:

[0021] The diode D1 connected in parallel with the sensing piezoelectric element is used to release the reverse charge;

[0022] A resistor R1 and a resistor R2 connected in series are connected in parallel to the rear end of the diode D1, and the resistor R1 and the resistor R2 are connected to a microcontroller for AD sampling;

[0023] The resistor R4 and the resistor R5 connected in series are connected in parallel to the rear end of the diode D1, and the resistor R4 and the resistor R5 are connected to the positive input terminal of the comparator U3;

[0024] A resistor R3 and a resistor R6 are connected in series, one end of which is connected to a power supply and the other end is grounded, and the resistor R3 and the resistor R6 are connected to the negative input terminal of the comparator U3;

[0025] The output terminal of the comparator U3 is connected to the microcontroller for converting a signal higher than a threshold value into a high level.

[0026] Furthermore, one end of the first resonant beam and the second resonant beam is connected to the housing through a matching fixing mechanism, and the other end of the first resonant beam is provided with a mass block sensitive to acceleration.

[0027] Furthermore, piezoelectric power generating elements are arranged on the upper and lower sides of the first resonance beam, and the polarities of the piezoelectric power generating elements on the upper and lower sides are arranged oppositely; piezoelectric sensing elements are arranged on the upper and lower sides of the second resonance beam, and the polarities of the piezoelectric sensing elements on the upper and lower sides are arranged oppositely.

[0028] Furthermore, the natural frequency of the second resonant beam is higher than the natural frequency of the first resonant beam.

[0029] Furthermore, it also includes a discharge circuit connected to the microcontroller, and the discharge circuit is used to discharge the power processing circuit.

[0030] Furthermore, the discharge circuit includes a discharge resistor and a control switch connected in series.

[0031] Furthermore, it also includes a communication module, which is used for the microcontroller to communicate with the outside world.

[0032] Furthermore, the communication module includes an RFID chip and an antenna.

[0033] The beneficial effects of the present invention are as follows:

[0034] The present invention discloses a passive impact counter integrating power generation and sensing, in which a first resonant beam and a second resonant beam are arranged on the same fixing mechanism and are integrally formed with the fixing mechanism, thereby reducing the size of the counter; the fixing mechanism causes the first resonant beam and the second resonant beam to be short-circuited, so that before the vibration of a power generating element is completely attenuated, the potential of the fixing mechanism as a common electrode changes with respect to the ground, and the potential of the other pole of the sensing piezoelectric element with respect to the ground also changes with the vibration of the power generating element due to the coupling of the piezoelectric sheet of the sensing piezoelectric element; before the second impact arrives, a switch is controlled to be closed by a microcontroller to short-circuit the common electrode with the ground, so that the sensing piezoelectric element is not affected by the power generating element, thereby avoiding erroneous counting. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the working principle of the present invention;

[0036] Figure 2 It is a top view of the power generation and sensor integration of the present invention;

[0037] Figure 3 is a front view of the power generation and sensing integration of the present invention;

[0038] Figure 4 It is a rear view of the power generation and sensor integration of the present invention;

[0039] Figure 5 is a power processing circuit diagram of the present invention;

[0040] Figure 6 It is a sensor signal processing circuit diagram of the present invention.

[0041] Reference numerals:

[0042] 1-first resonant beam, 2-generating piezoelectric element, 3-second resonant beam, 4-sensing piezoelectric element, 5-fixing mechanism, 6-mass block. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example 1

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this embodiment provides a power generation and sensing integrated passive impact counter, including:

[0047] The first resonant beam 1 for sensing external vibration or acceleration and the piezoelectric element 2 disposed thereon; the vibration transmitted by other elements or devices causes the first resonant beam 1 to deform accordingly, thereby driving the piezoelectric element 2 (piezoelectric sheet) thereon to deform accordingly and generate electric charge. The piezoelectric element 2 and the first resonant beam 1 constitute a power generation module.

[0048] The second resonant beam 3 and the sensing piezoelectric element 4 arranged thereon for sensing external vibration or acceleration; the vibration transmitted by other elements or devices causes the second resonant beam 3 to deform accordingly, thereby driving the sensing piezoelectric element 4 (piezoelectric sheet) thereon to deform accordingly and generate electric charge. The sensing piezoelectric element 4 and the second resonant beam 3 constitute a sensing module.

[0049] A fixing mechanism 5 connected to one end of the first resonant beam 1 and the second resonant beam 3 and formed integrally, the first resonant beam 1 and the second resonant beam 3 are electrically short-circuited through the fixing mechanism 5, and the fixing mechanism 5 is electrically grounded through a control switch; in the prior art, the first resonant beam 1 and the second resonant beam 3 are completely separated, that is, one end of the first resonant beam 1 and the second resonant beam 3 are respectively connected to different fixing mechanisms 5. When installing, the two different fixing mechanisms 5 need to be completely separated. This setting method will occupy a large installation space, so the volume of the counter will be relatively large. In order to further reduce the volume of the counter, the present invention connects one end of the first resonant beam 1 and the second resonant beam 3 to the fixing mechanism 5, saving the space between different fixing mechanisms 5; the fixing mechanism 5 is formed integrally with the first resonant beam 1 and the second resonant beam 3, avoiding the need for the first resonant beam 1 and the second resonant beam 3 to be installed on the fixing mechanism 5 with conventional fixing components such as bolts, saving the installation space of the fixing components. Since the first resonant beam 1 and the second resonant beam 3 are formed integrally with the fixing mechanism 5, the first resonant beam 1 and the second resonant beam 3 are short-circuited through the fixing mechanism 5. The fixing mechanism 5 acts as a common electrode with a potential different from that of the ground and changes with the power generating piezoelectric element 2. Therefore, before the vibration of the power generating piezoelectric element 2 is completely attenuated, the potential of the common electrode relative to the ground changes. The potential of the other pole of the sensing piezoelectric element 4 relative to the ground will also change with the vibration of the power generating element due to the coupling of the piezoelectric sheet of the sensing piezoelectric element 4 (equivalent to a capacitor). Therefore, the influence of the power generating element cannot be effectively shielded. In order to overcome this problem, the control switch is closed by the microcontroller before the second impact arrives, short-circuiting the common electrode and the ground, so that the sensing piezoelectric element 4 is not affected by the power generating piezoelectric element 2.

[0050] A power processing circuit is electrically connected to the piezoelectric element 2 and converts the charge generated by the deformation of the piezoelectric element into voltage; it is used to collect the charge generated by the piezoelectric element 2 so that it can power the microcontroller in the counter.

[0051] A sensing signal processing circuit is electrically connected to the sensing piezoelectric element 4, converts the charge generated by the deformation of the sensing piezoelectric element 4 into a voltage, and obtains the voltage impact signal; it is used to collect the charge generated by the sensing piezoelectric element 4 and convert it into a voltage, so as to obtain the voltage impact signal through the sensing signal processing circuit. In some mechanism impacts, each mechanism-specific impact includes several impacts, and the amplitude and time interval of each impact are within a certain range. Whether it is a mechanism impact can be determined by measuring the impact amplitude (voltage amplitude) and time interval. This judgment method has high accuracy and can eliminate most interference.

[0052] A microcontroller is electrically connected to a control switch, a power processing circuit, and a sensor signal processing circuit to complete the counting work. In order to prevent miscounting, it is necessary to judge according to the impact signal specific to the mechanism. When the impact signal specific to the mechanism is met, the counter count value is increased by 1 and stored, otherwise it is judged as interference, and the charge on the charging capacitor is discharged to wait for the next impact. Specifically, a program can be written into the single-chip microcomputer first. The function of the program is to read from the memory, add 1 to the value, and then write the value back to the memory. The initial value of the value is 0. The data in the memory is not erased after the single-chip microcomputer is powered off. If you want to view the counting result in the memory, you can use an external card reader circuit to read it, and use the single-chip microcomputer to achieve the counting effect by reading, accumulating, and writing. It is a more mature technology in the existing counters.

[0053] Example 2

[0054] On the basis of Example 1, Figure 5 As shown, the power processing circuit includes:

[0055] A charging capacitor for collecting and storing electric charge;

[0056] A rectifier bridge connected in series between the charging capacitor and the power generation area so that the charging capacitor collects the stored charge;

[0057] A voltage stabilizing module connected in series between the charging capacitor and the microcontroller to provide a stable voltage for the microcontroller;

[0058] The TVS tube connected in parallel between the charging capacitor and the voltage stabilizing module is used to protect the charging capacitor and the voltage stabilizing module that store charge.

[0059] In this embodiment, the power processing circuit includes a rectifier bridge, a charging capacitor, a TVS tube, and a voltage stabilizing module, wherein the voltage stabilizing module is an LDO module. The purpose is to store the charge generated by the power generation piezoelectric element 2 and provide a stable voltage to the subsequent circuit. The power processing circuit is connected to the power generation piezoelectric element 2, and through the cooperation of the rectifier bridge and the charging capacitor, the multiple electric quantities generated by the power generation piezoelectric element 2 within a predetermined time are accumulated, and a corresponding accumulated voltage is generated, which can effectively collect the electric quantities generated by the multiple vibrations of the power generation piezoelectric element 2, and ensure the supply of electric quantities required for the counter to work. Generally, when the first resonant beam 1 generates electricity, a Cc value selected as 50 to 100 times the Cd value can achieve a higher utilization rate.

[0060] Example 3

[0061] On the basis of Example 1, Figure 6 As shown, the sensor signal processing circuit includes:

[0062] The diode D1 connected in parallel with the sensing piezoelectric element 4 is used to release the reverse charge;

[0063] A resistor R1 and a resistor R2 connected in series are connected in parallel to the rear end of the diode D1, and the resistor R1 and the resistor R2 are connected to a microcontroller for AD sampling;

[0064] The resistor R4 and the resistor R5 connected in series are connected in parallel to the rear end of the diode D1, and the resistor R4 and the resistor R5 are connected to the positive input terminal of the comparator U3;

[0065] A resistor R3 and a resistor R6 are connected in series, one end of which is connected to a power supply and the other end is grounded, and the resistor R3 and the resistor R6 are connected to the negative input terminal of the comparator U3;

[0066] The output terminal of the comparator U3 is connected to the microcontroller for converting a signal higher than a threshold value into a high level.

[0067] In this embodiment, the voltage output from the power generation area of ​​the piezoelectric element is limited by the diode D1. The voltage is divided by the resistors R1 and R2 in series and then input into the microcontroller for AD sampling, so as to obtain the amplitude of the impact signal. The voltage is divided by the resistors R4 and R5 in series and then input into the positive input terminal of the comparator U3. The resistors R3 and R6 in series are connected to the power supply at one end and grounded at the other end. The resistors R3 and R6 are connected to the negative input terminal of the comparator U3. The signals above the threshold are converted into high level by the comparator U3, so as to facilitate the microcontroller to obtain the time point of the impact signal. If the signal is lower than the threshold, it is considered to be interference. The time when the high level appears and the voltage between R4 and R5 are used as the basis for judging whether the mechanism is impacted.

[0068] Example 4

[0069] On the basis of Example 1, Figure 2 , Figure 3 , Figure 4 As shown, one end of the first resonant beam 1 and the second resonant beam 3 are connected to the housing through a matching fixing mechanism 5, and the other end of the first resonant beam 1 is provided with a mass block 6 that is sensitive to acceleration.

[0070] In this embodiment, during specific use, one end of the first resonant beam 1 and the second resonant beam 3 are connected to the housing via a fixing mechanism 5, and a mass block 6 is provided at the other end of the first resonant beam 1 for receiving external vibrations through the mass block 6. The mass block 6 generates an inertial force under the impact acceleration to cause the first resonant beam 1 to vibrate and deform, and the piezoelectric element 2 attached to the surface of the first resonant beam 1 feels the same deformation, and the piezoelectric element 2 deforms to generate electric charge. The second resonant beam 3 receives external vibrations and vibrates and deforms, and the piezoelectric sensing element 4 attached to the surface of the second resonant beam 3 feels the same deformation, and the piezoelectric sensing element 4 deforms to generate electric charge

[0071] Example 5

[0072] On the basis of Example 1, Figure 3 , Figure 4 As shown, the upper and lower sides of the first resonance beam 1 are both provided with power generation piezoelectric elements 2, and the polarities of the power generation piezoelectric elements 2 on the upper and lower sides are oppositely arranged; the upper and lower sides of the second resonance beam 3 are both provided with sensing piezoelectric elements 4, and the polarities of the sensing piezoelectric elements 4 on the upper and lower sides are oppositely arranged.

[0073] In this embodiment, when vibration is generated in the vertical direction, taking the first resonance beam 1 as an example, the mass block 6 will vibrate up and down accordingly, and the first resonance beam 1 will bend. At a certain moment, the upper side of the first resonance beam 1 is stretched, and the lower side must be compressed. At this time, if positive charge appears on the upper surface of the upper side power generation piezoelectric element 2, and negative charge appears on the lower surface (the surface close to the first resonance beam 1), if the two power generation piezoelectric elements 2 are set in the same phase, then negative charge should appear on the upper surface of the lower element (the surface close to the first resonance beam 1), and positive charge appears on the lower surface. The charges of the two power generation piezoelectric elements 2 will be offset after being directly connected in series. Therefore, only when the two power generation piezoelectric elements 2 are set in opposite phases, the charges of the two power generation piezoelectric elements 2 will not be offset. If the two power generation piezoelectric elements 2 are set in the same direction, one of the power generation piezoelectric elements 2 can also be reversed and then connected in series by wiring, so the number of them can be arranged as needed. This scheme is adopted so that it can control the amount of charge generated by it according to the deformation by setting multiple power generation piezoelectric elements 2 as needed, so that when the power is supplied to the single-chip microcomputer, it can meet the use needs. The principle of the second resonant beam 3 is the same as that of the first resonant beam 1 , except that the other end of the second resonant beam 3 is not provided with a mass block 6 , and the vibration amplitude of the second resonant beam 3 is relatively small.

[0074] Example 6

[0075] On the basis of Embodiment 1, the natural frequency of the second resonant beam 3 is higher than the natural frequency of the first resonant beam 1 .

[0076] In this embodiment, the natural frequency of the sensing piezoelectric element 4 is higher than that of the generating piezoelectric element 2, thereby ensuring that the vibration attenuation of the sensing piezoelectric element 4 is significantly reduced when the second impact arrives.

[0077] Example 7

[0078] Based on the first embodiment, it further includes a discharge circuit connected to the microcontroller, and the discharge circuit is used for discharging the power processing circuit.

[0079] In this embodiment, a discharge circuit is provided for the power supply processing circuit. When in specific use, the discharge circuit includes a discharge resistor and a control switch connected in series. The discharge resistor and the control switch are connected in parallel with the charging capacitor. When the microcontroller compares the impact signal with a preset threshold value, the control switch in the discharge circuit is controlled to be closed when the counting is completed or not counted. At this time, the charging capacitor is connected in parallel with the resistor, and the charge stored in the charging capacitor is discharged through the discharge resistor. The discharge circuit includes a discharge resistor and a control switch connected in series.

[0080] Example 8

[0081] Based on the first embodiment, a communication module is further included, and the communication module is used for the microcontroller to communicate with the outside world.

[0082] In this embodiment, the microcontroller exchanges information with external devices through a communication module. Specifically, the communication module includes an RFID chip and an antenna. The RFID chip stores the number of mechanism impacts and other information, and the relevant data can be read out through a matching RFID reader.

Claims

1. A passive impact counter integrating power generation and sensing, characterized in that: include: A first resonant beam for sensing external vibration or acceleration and a piezoelectric element disposed thereon; A second resonant beam for sensing external vibration or acceleration and a sensing piezoelectric element disposed thereon; A fixing mechanism connected to one end of the first resonant beam and the second resonant beam and formed integrally, the first resonant beam and the second resonant beam are electrically short-circuited through the fixing mechanism, and the fixing mechanism is electrically grounded through a control switch; A power processing circuit electrically connected to the power generation piezoelectric element and converting the charge generated by the deformation of the power generation piezoelectric element into a voltage; A sensing signal processing circuit electrically connected to the sensing piezoelectric element, converting the charge generated by the deformation of the sensing piezoelectric element into a voltage and acquiring an impact signal of the voltage; A microcontroller electrically connected to the control switch, the power processing circuit, and the sensor signal processing circuit to perform counting work; The power processing circuit comprises: A charging capacitor for collecting and storing electric charge; A rectifier bridge connected in series between the charging capacitor and the power generation area so that the charging capacitor collects the stored charge; A voltage stabilizing module connected in series between the charging capacitor and the microcontroller to provide a stable voltage for the microcontroller; The TVS tube connected in parallel between the charging capacitor and the voltage stabilizing module is used to protect the charging capacitor and the voltage stabilizing module that store charge.

2. A power generation and sensing integrated passive impact counter according to claim 1, characterized in that: The sensor signal processing circuit comprises: The diode D1 connected in parallel with the sensing piezoelectric element is used to release the reverse charge; A resistor R1 and a resistor R2 connected in series are connected in parallel to the rear end of the diode D1, and the resistor R1 and the resistor R2 are connected to a microcontroller for AD sampling; The resistor R4 and the resistor R5 connected in series are connected in parallel to the rear end of the diode D1, and the resistor R4 and the resistor R5 are connected to the positive input terminal of the comparator U3; A resistor R3 and a resistor R6 are connected in series, one end of which is connected to a power supply and the other end is grounded, and the resistor R3 and the resistor R6 are connected to the negative input terminal of the comparator U3; The output terminal of the comparator U3 is connected to the microcontroller for converting a signal higher than a threshold value into a high level.

3. The power generation and sensing integrated passive impact counter according to claim 1 is characterized in that: One end of the first resonant beam and the second resonant beam is connected to the housing through a matching fixing mechanism, and the other end of the first resonant beam is provided with a mass block sensitive to acceleration.

4. The power generation and sensing integrated passive impact counter according to claim 1, characterized in that: The upper and lower sides of the first resonance beam are both provided with power generation piezoelectric elements, and the polarities of the power generation piezoelectric elements on the upper and lower sides are set oppositely; the upper and lower sides of the second resonance beam are both provided with sensing piezoelectric elements, and the polarities of the sensing piezoelectric elements on the upper and lower sides are set oppositely.

5. The power generation and sensing integrated passive impact counter according to claim 1 is characterized in that: The natural frequency of the second resonant beam is higher than the natural frequency of the first resonant beam.

6. The power generation and sensing integrated passive impact counter according to claim 1, characterized in that: A discharge circuit connected to the microcontroller is also included, and the discharge circuit is used for discharging the power processing circuit.

7. A power generation and sensing integrated passive impact counter according to claim 6, characterized in that: The discharge circuit includes a discharge resistor and a control switch connected in series.

8. The power generation and sensing integrated passive impact counter according to claim 1, characterized in that: It also includes a communication module, which is used for the microcontroller to communicate with the outside world.

9. The power generation and sensing integrated passive impact counter according to claim 8, characterized in that: The communication module includes an RFID chip and an antenna.

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