CN113916248A - Step counting equipment and step counting system - Google Patents

Abstract

The application discloses a step counting device and a step counting system. This meter step equipment includes: the piezoelectric energy collector is used for converting mechanical energy generated by the motion of an object to be detected into electric energy based on a piezoelectric effect, and the electric energy is used for supplying power to the step counting equipment; the piezoelectric accelerometer is used for acquiring an acceleration signal of the object to be detected when the object to be detected moves and sending the acceleration signal to the data processing module; and the data processing module is used for acquiring the acceleration signal and processing the acceleration signal to obtain the motion steps of the object to be detected. By adopting the step counting equipment provided by the application, the effect of providing electric energy for the step counting equipment can be realized when the step of the object to be detected is accurately counted.

Description

Step counting equipment and step counting system

Technical Field

The application relates to a micro-electro-mechanical technology, in particular to a step counting device and a step counting system.

Background

With the development of integrated circuits and micro-electromechanical systems, wireless sensor networks have come into existence and are widely applied to the fields of medical health, environmental detection, internet of things and the like, and on the other hand, the development of emerging technologies also urges new industries, such as smart farms.

Compared with the traditional breeding and animal husbandry, the intelligent farm realizes the real-time monitoring of poultry and livestock, such as the so-called 'step chicken' or 'mountain chicken', and needs to monitor the process of breeding the chickens from the chicks to the dining table, and meanwhile, the growth environment of the chickens can be checked by consumers, and the food tracing is realized.

The wireless sensor network nodes and the mobile electronic equipment adopted in the fields basically depend on battery power supply, and have the defects of limited battery service life and easy failure in severe environment. Such products are generally not battery replaceable, so that once the battery fails, resulting in data loss, the poultry or livestock information of origin will become unreliable. In addition, for livestock such as cattle and sheep with long growth period, more energy needs to be provided to maintain the normal operation of wireless sensing network and electronic equipment, and the large-volume battery limits the portability and miniaturization of the device.

Disclosure of Invention

The embodiment of the application aims to provide a step counting device and a step counting system, which can realize the effect of providing electric energy for the step counting device while accurately counting steps of an object to be detected.

The technical scheme of the application is as follows:

in a first aspect, a step-counting device is provided, comprising:

the piezoelectric energy collector is used for converting mechanical energy generated by the motion of an object to be detected into electric energy based on a piezoelectric effect, and the electric energy is used for supplying power to the step counting equipment;

the piezoelectric accelerometer is used for acquiring an acceleration signal of the object to be detected when the object to be detected moves and sending the acceleration signal to the data processing module;

and the data processing module is used for acquiring the acceleration signal and processing the acceleration signal to obtain the motion steps of the object to be detected.

In a second aspect, a step counting system is provided, which includes the step counting device of the first aspect, and a terminal;

and the terminal is used for receiving the moving step number of the object to be detected, which is obtained by the data processing module in the step counting equipment, and displaying the moving step number.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects:

the step counting equipment that this application embodiment provided includes: the piezoelectric energy collector can convert mechanical energy generated by movement of an object to be detected into electric energy based on a piezoelectric effect, and the electric energy is used for supplying power to the step counting equipment, so that the electric energy is generated when the object to be detected moves, battery power supply is not needed, the cruising ability of the step counting equipment is improved, the failure risk of the step counting equipment is reduced, and the self-powered device replaces the battery for supplying power, so that the energy-saving and environment-friendly effects are achieved. The step counting equipment further comprises a piezoelectric accelerometer and a data processing module, wherein the accelerometer is used for acquiring an acceleration signal of the object to be detected and sending the acceleration signal to the data processing module; and the data processing module is used for acquiring the acceleration signal and processing the acceleration signal to obtain the motion steps of the object to be detected. Therefore, the piezoelectric accelerometer can be used for acquiring the acceleration signal of the object to be detected in the motion process, the acceleration signal is processed by the data processing module, the motion step number of the object to be detected can be directly obtained, the motion step number of the object to be detected can be rapidly and accurately counted, accurate step counting of the object to be detected is realized, and the accelerometer is made of piezoelectric materials, so that the power consumption is low, the electric energy is saved, and therefore, the scheme realizes that the electric energy is provided for the step counting device while the accurate step counting of the object to be detected is carried out, and the normal work of the step counting device is ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application and are not to be construed as limiting the application.

FIG. 1 is a first schematic structural diagram of a step-counting device according to an embodiment of the present application;

FIG. 2 is a first schematic structural diagram of a step counting device according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a step-counting device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a step counting system according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples consistent with certain aspects of the present application, as detailed in the appended claims.

Based on the background art, compared with the traditional livestock breeding industry, the intelligent farm realizes the real-time monitoring of poultry and livestock, such as the process from the chicken breeding to the feeding table of the chicken, and simultaneously ensures that the consumer can check the growth environment of the chicken, thereby realizing the tracing of food. The wireless sensor network nodes and the mobile electronic equipment adopted in the fields basically depend on battery power supply, and have the defects of limited battery service life and easy failure in severe environment. Such products are generally not battery replaceable, so that once the battery fails, resulting in data loss, the poultry or livestock information of origin will become unreliable. In addition, for livestock such as cattle and sheep with long growth period, more energy needs to be provided to maintain the normal operation of wireless sensing network and electronic equipment, and the large-volume battery limits the portability and miniaturization of the device.

To solve the problems in the related art, an embodiment of the present application provides a step counting device, including: the piezoelectric energy collector can convert mechanical energy generated by movement of an object to be detected into electric energy based on a piezoelectric effect, and the electric energy is used for supplying power to the step counting equipment, so that the electric energy is generated when the object to be detected moves, battery power supply is not needed, the cruising ability of the step counting equipment is improved, the failure risk of the step counting equipment is reduced, and the self-powered device replaces the battery for supplying power, so that the energy-saving and environment-friendly effects are achieved. The step counting equipment further comprises a piezoelectric accelerometer and a data processing module, wherein the accelerometer is used for acquiring an acceleration signal of the object to be detected and sending the acceleration signal to the data processing module; and the data processing module is used for acquiring the acceleration signal and processing the acceleration signal to obtain the motion steps of the object to be detected. Therefore, the piezoelectric accelerometer can be used for acquiring the acceleration signal of the object to be detected in the motion process, the acceleration signal is processed by the data processing module, the motion step number of the object to be detected can be directly obtained, the motion step number of the object to be detected can be rapidly and accurately counted, accurate step counting of the object to be detected is realized, and the accelerometer is made of piezoelectric materials, so that the power consumption is low, the electric energy is saved, and therefore, the scheme realizes that the electric energy is provided for the step counting device while the accurate step counting of the object to be detected is carried out, and the normal work of the step counting device is ensured.

The step-counting device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

FIG. 1 is an architectural diagram illustrating a step counter device 10 according to an exemplary embodiment.

As shown in fig. 1, the step-counting device 10 comprises a piezoelectric energy harvester 100, a piezoelectric accelerometer 200 and a data processing module 300. The piezoelectric energy collector 100 is configured to convert mechanical energy generated by motion of an object to be detected into electric energy based on a piezoelectric effect, where the electric energy is used to supply power to the step counting device; the piezoelectric accelerometer 200 is used for acquiring an acceleration signal of the object to be detected when the object to be detected moves, and sending the acceleration signal to the data processing module 300; and the data processing module 300 is configured to acquire the acceleration signal and process the acceleration signal to obtain the number of motion steps of the object to be detected.

The object to be detected may be an object to be detected and counted, and the object to be detected may be poultry, such as, but not limited to, chicken, duck, goose, or the like.

The acceleration signal may be an acceleration value generated when the object to be detected moves.

In some implementations of the present application, the data processing module processes the acceleration signal, which may be amplifying, filtering and calculating the acquired acceleration signal to obtain the number of motion steps of the object to be detected.

In the embodiment of the application, the piezoelectric accelerometer and the piezoelectric energy collector can be installed on the body of the object to be detected, so that under the condition that the object to be detected moves, the acceleration of the step counting device can periodically and regularly change, the acceleration change of the step counting device can be acquired by the piezoelectric accelerometer, an acceleration signal is obtained, the acceleration signal is sent to the data processing module, the acceleration signal is analyzed after the data processing module acquires the acceleration signal, the moving step number of the object to be detected can be obtained, the purpose of accurately counting the steps of the object to be detected is achieved, the piezoelectric accelerometer is made of piezoelectric materials, power consumption is low, and power consumption of the step counting device is saved. Meanwhile, under the condition that the object to be detected moves, the mechanical energy of the object to be detected can be converted into electric energy by the piezoelectric energy collector based on the piezoelectric effect, the electric energy can be used for supplying power to the step counting equipment, the power supply of a battery is not needed, the cruising ability of the step counting equipment is improved, the failure risk of the step counting equipment is reduced, and the self-powered device replaces the battery for supplying power, so that the energy-saving and environment-friendly effects are achieved.

In some embodiments of the present application, to transmit the number of moving steps, the step counting device may further include: a wireless communication module 600. The input end of the wireless communication module 600 is connected to the output end of the data processing module 300, and is configured to obtain the exercise steps and transmit the exercise steps to an external device.

Wherein, the external device can be a device which is externally connected with the step counting device.

In some embodiments of the present application, the wireless communication module may include, but is not limited to, any one of: a Bluetooth communication module, a wireless radio frequency communication module or a near field communication module.

In some embodiments of the present application, the input end of the wireless communication module may be further connected to the output end of the energy storage module, so that the energy storage module supplies power to the wireless communication module.

In the embodiment of the application, the exercise step number can be transmitted to the external device through the wireless communication device, so that the exercise step number is transmitted, and the external device can process the exercise step number.

In some embodiments of the present application, to further save power, the step counting device may further comprise: a control module 400. The input end of the control module 400 may be connected to the output end of the piezoelectric accelerometer, and is configured to monitor an acceleration signal output by the piezoelectric accelerometer, and control the operating state of the data processing module and/or the wireless communication module based on the acceleration signal.

In some embodiments of the present application, the control module 400 may be specifically configured to: sending a sleep instruction to the data processing module and/or the wireless communication module under the condition that the value of an acceleration signal output by the piezoelectric accelerometer in a first preset time period is monitored to be smaller than a first preset threshold value, so that the data processing module and/or the wireless communication module enters a sleep mode based on the sleep instruction; and sending a wake-up instruction to the data processing module and/or the wireless communication module under the condition that the change value of the acceleration signal output by the piezoelectric accelerometer in a second preset time period is monitored to be larger than a second preset threshold value, so that the data processing module and/or the wireless communication module enters a working mode based on the wake-up instruction.

Wherein the first preset time period may be a preset time period.

The first preset threshold may be a preset threshold corresponding to a value of an acceleration signal output by the piezoelectric accelerometer within a first preset time period.

The second preset time period may be a preset time period, and the second preset time period may be the same as or different from the first preset time period.

The second preset threshold may be a preset threshold of a change value of the acceleration signal output by the piezoelectric accelerometer within a second preset time period.

In some embodiments of the present application, the control module may monitor an acceleration signal output by the piezoelectric accelerometer in real time, and when the acceleration signal output by the piezoelectric accelerometer is lower than a certain set threshold (i.e., a first preset threshold) within a certain period of time (i.e., a first preset time period), it indicates that the object to be detected is currently in a stationary state, so that the data processing module and/or the wireless communication module do not need to operate, and the control module may send a sleep instruction to the step-counting device, so that the step-counting device enters a sleep mode, and energy loss is reduced. When the acceleration signal output by the piezoelectric accelerometer changes within a certain period of time (namely a second preset time period) and exceeds a certain threshold (namely a second preset threshold), the object to be detected starts to move, at the moment, the control module sends out the awakening instruction again, and the data processing module and/or the wireless communication module are awakened, so that the data processing module and/or the wireless communication module enter a working mode based on the awakening instruction.

In some embodiments of the present application, the control module may be composed of a low power consumption MCU chip or other programmable chip.

In the embodiment of the application, the step counting device is controlled to be in the sleep mode or the working mode based on the control module, when the object to be detected is in the static state, the step counting device can be controlled to be in the sleep mode, and when the object to be detected moves, the step counting device is started to work, so that the power consumption is saved.

In some embodiments of the present application, the control module 400 and the data processing module 300 may be separately provided, or may be integrally provided as shown in fig. 2 to form the signal processing chip 2000.

In some embodiments of the present application, after the electric energy is generated, the electric energy may be stored, so that the stored electric energy may be directly used for supplying power when the electric energy is needed, and therefore, in order to store the electric energy, the step counting device mentioned above may further include: and the input end of the energy storage module 500 can be connected with the output end of the piezoelectric energy collector, and the output end of the energy storage module can be connected with the input end of the data processing module, and is used for receiving the electric energy generated by the piezoelectric energy collector and storing the electric energy.

In the embodiment of the application, after the electric energy is generated, the electric energy can be stored by using the energy storage module, so that the stored electric energy can be directly used for supplying power when the electric energy is needed.

In some embodiments of the application, after the movement steps of the object to be detected are obtained, the movement steps can be transmitted to the terminal so as to check the movement steps of the object to be detected in real time, know the movement condition of the object to be detected, and analyze the health condition of the object to be detected based on the movement condition.

In some embodiments of the present application, as shown in fig. 3, the piezoelectric energy harvester and the piezoelectric accelerometer may be integrated to form an integrated chip 1000, the integrated chip 1000 may include a chip housing 1001, and the piezoelectric accelerometer may be located at a center position of the integrated chip; the piezoelectric energy harvester may be located at the edge of the integrated chip, surrounding the piezoelectric accelerometer. Like this with the integrated setting of piezoelectric energy collector and piezoelectric accelerometer, can directly arrange integrated chip in wait to detect the object on one's body, save space, avoid installing piezoelectric energy collector and piezoelectric accelerometer on waiting to detect the object simultaneously, treat that the detection object causes more injury.

In the embodiment of the present application, the integrated chip may be manufactured by a semiconductor process, and the piezoelectric energy harvester and the piezoelectric accelerometer may have the same manufacturing process step, and thus may be manufactured by the same wafer.

It should be noted that, in fig. 3, the number of the piezoelectric energy collectors is 4, but in some embodiments of the present invention, the number of the piezoelectric energy collectors is not limited.

In some embodiments of the present application, as shown in fig. 3, the piezoelectric energy harvester may include a plurality of piezoelectric cantilevers 101 of different lengths, for each of which at least one first mass 102 is disposed on the piezoelectric cantilever, and the preset length of each piezoelectric cantilever is a length that enables the resonant frequency of each piezoelectric cantilever to be within the ambient vibration frequency range.

Wherein the first mass may be a mass placed on each piezoelectric cantilever in the piezoelectric energy harvester.

The preset length may be a preset length of the piezoelectric cantilever.

The environmental vibration frequency range may be a vibration frequency generated when an object to be detected, into which the piezoelectric energy harvester is integrated, moves.

It should be noted that the shape of the piezoelectric cantilever in fig. 3 is an L shape, which is only an example of the embodiment of the present application, and in some embodiments of the present application, the shape of the piezoelectric cantilever may also be, but is not limited to, a square shape, a circular shape, a star shape, and the like, and is not limited herein.

In some embodiments of the present application, the predetermined length of each piezoelectric cantilever in the piezoelectric energy harvester can be designed to have a resonant frequency of each piezoelectric cantilever within the ambient vibration frequency range.

In this application embodiment, piezoelectricity energy collector has maximum output when resonant frequency, can make whole piezoelectricity energy collector have a plurality of resonant frequency that are close in a certain frequency channel through the piezoelectricity cantilever beam that sets up different length to increase piezoelectricity energy collector's operating bandwidth, and then promote piezoelectricity energy collector's output.

In some embodiments of the present application, when there is vibration in the outside (i.e. when the object to be detected moves), the first mass block arranged above the piezoelectric cantilever beam also vibrates simultaneously, the piezoelectric cantilever beam can deform, and through the piezoelectric effect of the piezoelectric material above the piezoelectric cantilever beam, an electric charge can be generated, so that the purpose of converting mechanical energy into electric energy is achieved, and when the vibration frequency of the object to be detected approaches the resonance frequency of the piezoelectric cantilever beam, the output power of the electric energy can reach a maximum value.

In some embodiments of the present application, for each piezoelectric cantilever, there is an electrical connection between the piezoelectric cantilever and a respective first mass disposed on the piezoelectric cantilever. And each piezoelectric cantilever is connected with the other piezoelectric cantilever through a circuit.

In some embodiments of the present application, as shown in fig. 3, a piezoelectric accelerometer may comprise: a second mass 201, and a plurality of piezoelectric sensing beams 202 surrounding the second mass.

Wherein the second mass may be a mass in a piezoelectric accelerometer.

In some embodiments of the present application, the second mass is electrically connected to the piezoelectric sensing beam.

In some embodiments of the present application, the piezoelectric accelerometer may be specifically used for: and under the condition that the difference value between the frequency of the moving acceleration of the object to be detected and the resonance frequency of the piezoelectric accelerometer is greater than or equal to a preset threshold value, acquiring an acceleration signal of the object to be detected, and sending the acceleration signal to the data processing module.

Wherein the resonant frequency of the piezoelectric accelerometer is determined based on the second mass and a plurality of piezoelectric sensing beams surrounding the second mass. The second mass block and the plurality of piezoelectric sensitive beams surrounding the second mass block can be designed such that the resonant frequency of the second mass block and the plurality of piezoelectric sensitive beams surrounding the second mass block is much greater than the vibration frequency of the external environment (i.e., the vibration frequency generated when the object to be detected moves).

The preset threshold may be a preset threshold of a difference value between the frequency of the acceleration of the movement of the object to be detected and the resonant frequency of the piezoelectric accelerometer.

In some embodiments of the present application, when an object to be detected moves, the second mass block moves to drive the piezoelectric sensing beam to deform, when the frequency of the acceleration is far lower than the resonant frequency of the piezoelectric accelerometer, due to the piezoelectric effect of the piezoelectric thin film material arranged above the piezoelectric sensing beam, the piezoelectric material induces charges in direct proportion to the external acceleration, and the specific value of the acceleration can be calculated by collecting and processing charge signals.

In some embodiments of the present application, in order to check the number of moving steps of the object to be detected in real time, an embodiment of the present application further provides a step counting system, which can be specifically referred to as the following embodiments.

FIG. 4 is an architecture diagram illustrating a step-counting system in accordance with an exemplary embodiment.

As shown in fig. 4, the step counting system may include: the step counting device 10 in the above embodiment, and the terminal 30. The terminal 30 is connected to an output end of the wireless communication module 600 in the step counting device 10, and is configured to receive the moving step number of the object to be detected, which is obtained by the data processing module in the step counting device, and display the moving step number.

In the embodiment of the application, after the movement steps of the object to be detected are obtained, the movement steps can be transmitted to the terminal based on the wireless communication module to be displayed in the terminal, so that the movement steps of the object to be detected can be conveniently checked in real time, the movement condition of the object to be detected can be known, and the health condition of the object to be detected can be analyzed based on the movement condition.

In some embodiments of the present application, the step counting device 10 included in the step counting system has the same structure and effects as those of the above embodiments, and will not be described herein again.

It should be noted that, in fig. 4, the piezoelectric energy harvester and the piezoelectric accelerometer are integrated to form an integrated chip, and the data processing module and the control module are integrated to form a signal processing chip, fig. 4 is only an example, and in some embodiments of the present application, the piezoelectric energy harvester, the piezoelectric accelerometer, the data processing module, and the control module may also be separately provided, which is not limited herein.

In some embodiments of the present application, the terminal may be an electronic device with a display function, for example, a mobile phone, a tablet, or a client.

In some embodiments of the present application, the pedometry system may be applied to free-range poultry, livestock, etc. and the usage cycle may span the entire life cycle of poultry livestock from birth to sale, thereby ensuring the true validity of the data. In addition, this meter step system can also be applied to thing networking fields such as intelligent bracelet, wisdom farm and health monitoring.

It should also be noted that the exemplary embodiments mentioned in this patent describe some systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.

As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.

Claims (10)

1. A step counting device, characterized in that the step counting device comprises:

the piezoelectric energy collector is used for converting mechanical energy generated by the motion of an object to be detected into electric energy based on a piezoelectric effect, and the electric energy is used for supplying power to the step counting equipment;

the piezoelectric accelerometer is used for acquiring an acceleration signal of the object to be detected when the object to be detected moves and sending the acceleration signal to the data processing module;

and the data processing module is used for acquiring the acceleration signal and processing the acceleration signal to obtain the motion steps of the object to be detected.

2. The step counting device of claim 1, further comprising:

and the wireless communication module is used for acquiring the exercise steps and transmitting the exercise steps to external equipment.

3. The step counting device of claim 2, further comprising:

and the control module is used for monitoring the acceleration signal output by the piezoelectric accelerometer and controlling the working state of the data processing unit and/or the wireless communication module based on the acceleration signal.

4. The step counting device of claim 3, wherein the control unit is specifically configured to:

under the condition that the value of the acceleration signal output by the piezoelectric accelerometer in a first preset time period is monitored to be smaller than a first preset threshold value, sending a sleep instruction to the data processing module and/or the wireless communication module to enable the data processing module and/or the wireless communication module to enter a sleep mode based on the sleep instruction;

and sending a wake-up instruction to the data processing module and/or the wireless communication module under the condition that the change value of the acceleration signal output by the piezoelectric accelerometer in a second preset time period is monitored to be larger than a second preset threshold value, so that the data processing module and/or the wireless communication module enters a working mode based on the wake-up instruction.

5. The step counting device according to any one of claims 1 to 4, further comprising:

and the energy storage module is used for receiving the electric energy generated by the piezoelectric energy collector and storing the electric energy.

6. The step counting device of claim 3, wherein said control module and said data processing module are integrally provided.

7. The step counting device according to any one of claims 1 to 4, wherein the piezoelectric energy harvester and the piezoelectric accelerometer are integrated to form an integrated chip;

the piezoelectric accelerometer is positioned in the center of the integrated chip;

the piezoelectric energy collector is positioned at the edge of the integrated chip and surrounds the piezoelectric accelerometer.

8. The step counting device of claim 7, wherein the piezoelectric energy harvester comprises a plurality of piezoelectric cantilevers of different lengths, at least one first mass disposed on the piezoelectric cantilevers, and wherein the predetermined length of each piezoelectric cantilever is such that the resonant frequency of each piezoelectric cantilever is within the ambient vibration frequency range.

9. The step counting device of claim 7 or 8, wherein said piezoelectric accelerometer comprises: a second mass, and a plurality of piezoelectric sensing beams surrounding the second mass, the piezoelectric accelerometer being specifically configured to:

under the condition that the difference value between the frequency of the acceleration of the movement of the object to be detected and the resonance frequency of the piezoelectric accelerometer is greater than or equal to a preset threshold value, acquiring an acceleration signal of the object to be detected, and sending the acceleration signal to a data processing module;

wherein a resonant frequency of the piezoelectric accelerometer is determined based on a second mass and a plurality of piezoelectric sense beams surrounding the second mass.

10. A step-counting system, characterized in that it comprises a step-counting device according to any one of claims 1 to 9, and a terminal;

and the terminal is used for receiving the moving step number of the object to be detected, which is obtained by the data processing module in the step counting equipment, and displaying the moving step number.

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