CN117829196A - Counter, counting method, chip and electronic equipment - Google Patents

Abstract

The present invention relates to the field of counters, and provides a counter and a counting method, a chip, and an electronic device. The counter includes a control module and a magnetic sensor module, and the magnetic sensor module includes ^2N magnetic switch sensors and a magnet, where N is a positive integer greater than or equal to 1. The magnetic switch sensor is used to generate a pulse signal under the influence of the periodically changing magnetic field of the magnet, and the control module is used to count based on the pulse signals generated by the ^2N magnetic switch sensors. The present invention adopts multiple magnetic switch sensors, and counts the pulse signals generated by multiple magnetic switch sensors through a control module corresponding to multiple magnetic switch sensor data algorithms, thereby improving the sensitivity and accuracy of pulse monitoring, and can meet the real-time and accurate statistics of water consumption or gas consumption in a closed environment.

Description

Counter, counting method, chip, and electronic device

Technical Field

The present invention relates to the field of counters, and in particular to a counter based on a magnetic sensor, a counting method, a chip and an electronic device.

Background technique

Existing counters are mainly divided into contact counters and non-contact counters. Non-contact counters are divided into photoelectric sensor counters and magnetic sensor counters according to different signal sources. Non-contact counters mainly realize measurement, counting, control and other functions by counting the pulse signals of sensors. They are widely used in counting application scenarios in industries such as industrial production, scientific experiments and consumer electronics.

The photoelectric sensor counter converts the light signal into an electrical signal through an analog circuit using a photoelectric sensor, and uses a digital circuit to perform logical operations to form a pulse signal for counting. The disadvantages of the photoelectric sensor counter are poor environmental adaptability (it needs to be in a closed environment), poor anti-interference, susceptibility to dust and light interference, and complex installation. The magnetic sensor counter uses a magnetic sensor to generate a pulse signal to achieve counting, overcoming the disadvantages of the photoelectric sensor counter that it is difficult to install and susceptible to interference. However, the existing magnetic sensor counter counts based on the number of pulse signals output by a single magnetic sensor, and has low accuracy, and is not suitable for real-time and accurate statistics of water or gas usage in a closed environment.

Summary of the invention

In order to solve the above technical defects, the present invention provides a counter and a counting method based on a magnetic sensor.

The magnetic sensor-based counter provided by the present invention comprises: a control module and a magnetic sensing module;

The magnetic sensing module includes 2 ^N magnetic switch sensors and a magnet, where N is a positive integer greater than or equal to 1;

The magnetic switch sensor is used to generate a pulse signal under the influence of the periodically changing magnetic field of the magnet;

The control module is used to count based on the pulse signals generated by ^2N magnetic switch sensors.

In an embodiment of the present invention, the magnetic sensing module includes two magnetic switch sensors, and the magnet includes a south pole magnet and a north pole magnet; under the influence of the magnetic field generated by the magnet rotating one circle, the two magnetic switch sensors jointly generate a 00, 01, 10, 11 pulse signal that cycles once; the control module counts once for each cycle of the 00, 01, 10, 11 pulse signals generated by the two magnetic switch sensors.

In an embodiment of the present invention, the magnetic sensing module includes four magnetic switch sensors, and the magnet includes a south pole magnet and a north pole magnet; under the influence of the magnetic field generated by the magnet rotating one circle, the four magnetic switch sensors jointly generate 000, 001, 010, 011, 100, 101, 110, 111 pulse signals that cycle once; the control module counts once for each cycle of 000, 001, 010, 011, 100, 101, 110, 111 pulse signals generated by the four magnetic switch sensors.

In an embodiment of the present invention, the magnet includes a south pole magnet and a north pole magnet; the south pole magnet and the north pole magnet are installed on a rotating device to generate a periodically changing magnetic field driven by the rotation of the rotating device.

In an embodiment of the present invention, the rotating device includes a wind wheel, a connecting rod and a turntable, the wind wheel and the turntable are connected to the connecting rod, and the connecting rod is located at the center of the turntable; the south pole magnet and the north pole magnet are installed on the turntable and are symmetrically distributed relative to the connecting rod; the wind wheel rotates under the force of the counting object to drive the south pole magnet and the north pole magnet on the turntable to rotate.

In the embodiment of the present invention, the magnetic sensing module includes two magnetic switch sensors, and the angle between the two magnetic switch sensors and the center of the turntable is 90°.

In the embodiment of the present invention, the magnetic sensing module includes four magnetic switch sensors, and the angle intervals between the four magnetic switch sensors and the center of the turntable are 45° respectively.

In the embodiment of the present invention, the square wave duty cycle of the pulse signal generated by the magnetic switch sensor is 0.5.

In the embodiment of the present invention, the magnetic switch sensor is a TMR magnetic switch sensor.

In an embodiment of the present invention, the magnetic sensor-based counter further includes a display module, and the display module is used to display the count number of the control module.

In an embodiment of the present invention, the display module includes an LED driving circuit and an LED lamp array;

The LED driving circuit controls the on and off of the LED lamp array according to the logic signal output by the control module.

In an embodiment of the present invention, the control module includes a clock unit, and the clock unit is used to provide a logic signal for driving the LED lamp array to turn on and off sequentially to the LED driving circuit.

In an embodiment of the present invention, the clock unit includes a comparator, a trigger and a selector;

The comparator is used to convert the analog signal generated by the magnetic switch sensor into a pulse signal;

The trigger is used to adjust the duty cycle of the pulse signal to obtain pulse periods with different frequency divisions;

The selector is used to select the pulse period of the corresponding frequency division to obtain a logic signal for driving the LED lamp array to turn on and off sequentially.

In an embodiment of the present invention, the trigger is composed of two D triggers to obtain a pulse period with a frequency division of 2; or, the trigger is composed of three D triggers and two NAND gates to obtain a pulse period with a frequency division of 6.

The present invention also provides a counting method, which uses the above-mentioned counter based on the magnetic sensor to perform counting.

The present invention also provides a chip, which includes the above-mentioned counter based on the magnetic sensor.

The present invention also provides an electronic device, which includes the above-mentioned counter based on the magnetic sensor.

The present invention adopts multiple magnetic switch sensors and counts the pulse signals generated by the multiple magnetic switch sensors through a control module corresponding to the data algorithm of the multiple magnetic switch sensors, thereby improving the sensitivity and accuracy of pulse monitoring, and can meet the real-time and accurate statistics of water consumption or gas usage in a closed environment, and is suitable for high-precision measurement of water meters, gas meters and other equipment in existing application scenarios.

Other features and advantages of the technical solution of the present invention will be described in detail in the specific implementation section below.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 is a schematic structural diagram of a magnetic sensor-based counter provided in an embodiment of the present invention;

FIG2 is a schematic diagram of the layout of a magnetic sensor module provided in one embodiment of the present invention;

FIG3 is a schematic diagram of the layout of a magnetic sensor module provided in another embodiment of the present invention;

FIG4 is a schematic diagram of a trigger in a magnetic sensor-based counter according to an embodiment of the present invention;

FIG5 is a schematic diagram of a timing cycle of a clock unit in a magnetic sensor-based counter provided in an embodiment of the present invention;

FIG6 is a schematic diagram of a timing cycle of a clock unit in a magnetic sensor-based counter according to another embodiment of the present invention;

FIG. 7 is a circuit schematic diagram of a display module in a magnetic sensor-based counter according to an embodiment of the present invention.

Detailed ways

In order to make the technical solutions and advantages of the embodiments of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The embodiment of the present invention provides a counter based on a magnetic sensor, including a control module and a magnetic sensing module, wherein the magnetic sensing module includes ^2N magnetic switch sensors and a magnet, where N is a positive integer greater than or equal to 1. The magnetic switch sensor is used to generate a pulse signal under the influence of the periodically changing magnetic field of the magnet, and the control module is used to count the pulse signals generated by the ^2N magnetic switch sensors. The present invention adopts a plurality of magnetic switch sensors, and counts the pulse signals generated by the plurality of magnetic switch sensors through a control module corresponding to the data algorithm of the plurality of magnetic switch sensors, thereby improving the sensitivity and accuracy of pulse monitoring, and can meet the real-time and accurate statistics of water consumption or gas consumption in a closed environment, and is suitable for high-precision metering of water meters, gas meters and other equipment in existing application scenarios.

The technical solution of the present invention is described in detail below through specific embodiments.

FIG1 is a schematic diagram of the structure of a magnetic sensor-based counter provided by an embodiment of the present invention. As shown in FIG1 , the magnetic sensor-based counter provided in this embodiment includes a control module, a magnetic sensing module and a display module. The magnetic sensing module includes two magnetic switch sensors and a magnet. The magnetic switch sensor is used to generate a pulse signal under the influence of the periodic magnetic field of the magnet. The control module is used to count based on the pulse signal generated by the two magnetic switch sensors, and the display module is used to display the count number of the control module. The magnetic switch sensor generates a pulse signal due to the influence of the periodic magnetic field change generated by the magnet. The pulse signal is input into the control module, and the input pulse signal is calculated by the counter unit of the control module, and the number of pulses is displayed by the display module. With the periodic disappearance and generation of the magnetic signal of the magnet, the control module controls the on and off of the LED array of the display module to make the signal detection more intuitive.

In one embodiment of the present invention, the magnetic sensing module includes two magnetic switch sensors and a magnet. As shown in FIG2 , the magnetic switch sensor 11 and the magnetic switch sensor 12 are integrated on the main board 10. The magnet includes a south pole magnet 21 and a north pole magnet 22, and the south pole magnet 21 and the north pole magnet 22 are installed on the rotating device, and are used to generate a periodically changing magnetic field driven by the rotation of the rotating device. The rotating device includes a wind wheel 23, a connecting rod 24 and a turntable 25, and the wind wheel 23 and the turntable 25 are fixedly connected with the connecting rod 24, and the connecting rod 24 is located at the center of the turntable 25. The south pole magnet 21 and the north pole magnet 22 are installed on the turntable 25 and are symmetrically distributed relative to the connecting rod 24. The wind wheel 23 rotates under the force of the counting object (such as flowing water or gas) to drive the south pole magnet 21 and the north pole magnet 22 on the turntable 25 to rotate. The main board 10 where the two magnetic switch sensors are located is located directly below the turntable 25 where the magnet is located, and the center of the main board 10 is collinear with the connecting rod 24, so that the magnet passes just above the magnetic sensor when rotating. The two magnetic switch sensors are distributed at a certain angle to the magnetic field centers of the south pole magnet and the north pole magnet, ensuring that the two magnetic switch sensors are within the magnetic field range of the magnet and can be affected by periodic magnetic field changes. Under the influence of the magnetic field generated by the south pole magnet and the north pole magnet rotating one circle, the two magnetic switch sensors jointly generate a 00, 01, 10, 11 pulse signal that is cyclical, and the control module counts the 00, 01, 10, 11 pulse signals generated by the two magnetic switch sensors once for each cycle. For example, under normal circumstances, when the N pole (north pole) magnet rotates clockwise for one circle and sweeps over the two magnetic switch sensors, the pulse signals generated by the two magnetic switch sensors are 00, 01, 10, 11. When the N pole magnet rotates counterclockwise (reverse), the pulse sequence generated by the two magnetic switch sensors changes, for example, to 11, 10, 01, 00. As long as the pulse sequence completes a cycle, it is counted once, which can effectively ensure the accuracy of the counting. The magnet is composed of a south pole magnet and a north pole magnet, and reverse counting can be realized, that is, the counter can accurately count when the magnet rotates forward or reverse.

In other embodiments, the magnet may be a single south pole magnet or a single north pole magnet. Under the influence of the magnetic field generated by a single magnet rotating one circle, the two magnetic switch sensors generate a 01, 10 pulse signal that cycles once, and count once based on each pulse signal that cycles once. Counting can be achieved when the magnet is only a single magnet, but it is difficult to achieve accurate counting when the magnet is reversed.

In some specific embodiments, the magnetic switch sensor may adopt a TMR magnetic switch sensor, which has the advantages of high sensitivity, low power consumption, high reliability, etc. When the counter based on the TMR magnetic sensor is applied to the water meter, the water flows into the water meter through the pipe, and the wind wheel in the water meter rotates under the impact force of the flowing water. Through the cooperation of the gear set, the magnet can periodically pass through the TMR magnetic switch sensor according to a certain rule. After the TMR magnetic switch sensor senses the change of the magnetic field, it outputs a corresponding signal, that is, when the south pole magnet and the north pole magnet rotate forward, the two TMR magnetic switch sensors alternately generate switch signals according to the change of the magnetic field, forming pulse signals of 00, 01, 10, and 11; when the south pole magnet and the north pole magnet reverse, the order of the pulse signals generated by the two TMR magnetic switch sensors will be reversed, and the control module MCU can realize the forward and reverse flow counting by collecting these pulse signals. In a specific embodiment, in order to make the counter count more accurately, the square wave duty cycle output by the two TMR magnetic switch sensors should be as close to 0.5 as possible, consistent with the signal acquisition frequency between the magnet and the TMR magnetic sensor, that is, the angle between the two TMR magnetic switch sensors and the center of the turntable 25 is 90°.

In one embodiment of the present invention, the display module of the counter includes an LED driving circuit and an LED light array, and the LED driving circuit controls the on and off of the LED light array according to the logic signal output by the control module. The circuit schematic diagram of the display module is shown in FIG7 , including a driving chip for driving the light emitting diode array, and capacitors C ₁ , C ₂ , C ₃ , C ₄ and resistors R ₁ , R ₂ , R ₃ , R ₄ in the circuit play the role of protecting the circuit and signal compensation.

In one embodiment of the present invention, the control module adopts a microcontroller (MicroController Unit, referred to as MCU) with a clock unit, and the clock unit provides a logic signal for driving the LED lamp array to light up and down sequentially for the LED driving circuit. The clock unit of the microcontroller includes a comparator, a trigger and a selector. The comparator is used to convert the analog signal generated by the magnetic switch sensor into a pulse signal (corresponding to the logic signal 1, 0, 1 represents a high level, and 0 represents a low level). The trigger is used to adjust the duty cycle of the pulse signal to obtain pulse periods with different frequency divisions. Among them, the frequency division principle of the trigger is shown in Figure 4, the 4-frequency division trigger is composed of 2 D triggers, and the 6-frequency division trigger is composed of 3 D triggers and 2 NAND gates. For example, the duty cycle of the square wave output by the two TMR magnetic switch sensors is 0.5. When the signal acquisition frequency between the magnet and the TMR magnetic sensor is consistent, when the frequency signal enters the trigger, a high and low level flip is started at the falling edge. The selector is used to select the pulse period of the corresponding frequency division to obtain a logic signal that drives the LED lamp array to light up and down sequentially. Specifically, the pulse signal output by the comparator is used as the clock pulse of the subsequent trigger. After the logic processing of the trigger, the pulse cycle of 2-frequency division and 4-frequency division as shown in Figure 5 is obtained as the timing cycle of the microcontroller. According to the specific on and off of the LED light, the selector selectively passes the pulse cycle of the corresponding frequency division, and then drives the LED light array. Finally, the microcontroller inputs the processed logic signal to the LED drive circuit through the PWM terminal to control the on and off of the LED light array.

In another embodiment of the present invention, the magnetic sensing module includes four magnetic switch sensors and a magnet. As shown in FIG3 , the magnetic switch sensor 11, the magnetic switch sensor 12, the magnetic switch sensor 13, and the magnetic switch sensor 14 are integrated on the main board 10. The magnet includes a south pole magnet 21 and a north pole magnet 22, and the south pole magnet 21 and the north pole magnet 22 are installed on the rotating device, and are used to generate a periodically changing magnetic field driven by the rotation of the rotating device. The rotating device includes a wind wheel 23, a connecting rod 24, and a turntable 25, and the wind wheel 23 and the turntable 25 are fixedly connected to the connecting rod 24, and the south pole magnet 21 and the north pole magnet 22 are installed on the turntable 25. The wind wheel 23 rotates under the force of the counting object (such as flowing water or gas) to drive the south pole magnet 21 and the north pole magnet 22 on the turntable 25 to rotate. The four magnetic switch sensors are arranged below the magnet and are distributed at a certain angle to the magnetic field center of the south pole magnet and the north pole magnet, so as to ensure that the four magnetic switch sensors are within the magnetic field range of the magnet and can be affected by the periodic magnetic field changes. Under the influence of the magnetic field generated by the rotation of the magnet (the south pole magnet 21 and the north pole magnet 22) once, the four magnetic switch sensors jointly generate a cycle of 000, 001, 010, 011, 100, 101, 110, 111 pulse signals. The control module counts once for each cycle of 000, 001, 010, 011, 100, 101, 110, 111 pulse signals generated by the four magnetic switch sensors.

In some specific embodiments, four TMR magnetic switch sensors are used, and the four TMR magnetic switch sensors are arranged at 0°, 45°, 90°, and 135°. When the south pole magnet and the north pole magnet rotate forward, the four TMR magnetic switch sensors generate switch signals alternately according to the change of the magnetic field, forming pulse signals of 000, 001, 010, 011, 100, 101, 110, and 111; when the south pole magnet and the north pole magnet rotate reversely, the order in which the four TMR magnetic switch sensors generate pulse signals will be reversed, and the control module realizes forward and reverse flow counting by collecting pulse signals. In order to make the counter count more accurately, the square wave duty cycle output by the four TMR magnetic switch sensors should be as close to 0.5 as possible, and the angle intervals between the four TMR magnetic switch sensors and the center of the turntable 25 are 45° respectively.

In another embodiment of the present invention, the control module uses a microcontroller with a clock unit, and the clock unit provides a logic signal for driving the LED light array to light up and down sequentially for the LED driving circuit. The clock unit of the microcontroller includes a comparator, a trigger and a selector. The comparator is used to convert the analog signal generated by the magnetic switch sensor into a pulse signal (corresponding to the logic signal 1, 0). The trigger is used to adjust the duty cycle of the pulse signal to obtain pulse periods with different frequency divisions. Among them, the 4-frequency division trigger is composed of 2 D flip-flops, and the 6-frequency division trigger is composed of 3 D flip-flops and 2 NAND gates. The selector is used to select the pulse period of the corresponding frequency division to obtain the logic signal for driving the LED light array to light up and down sequentially. Specifically, the pulse signal output by the comparator is used as the clock pulse of the subsequent D flip-flop, and after a series of logic processing of the D flip-flops and the NOR gate, the pulse periods of 2, 4 and 6 frequency divisions as shown in Figure 6 are obtained as the timing period of the microcontroller. According to the specific on and off of the LED light, the selector selectively passes the pulse period of the corresponding frequency division, thereby driving the LED light array. Finally, the microcontroller inputs the processed logic signal to the LED drive circuit through the PWM terminal to control the on and off of the LED light array.

In other embodiments, the magnetic sensing module may use 8 magnetic switch sensors, 16 magnetic switch sensors, etc. The more magnetic switch sensors there are, the higher the accuracy of the counter.

An embodiment of the present invention further provides a counting method, which uses the magnetic sensor-based counter of the above embodiment to perform counting.

An embodiment of the present invention further provides a chip, which includes the magnetic sensor-based counter of the above embodiment.

The embodiment of the present invention also provides an electronic device, which includes the counter based on the magnetic sensor of the above embodiment. The electronic device is, for example, a water meter or a gas meter. The water meter based on the non-contact counter of magnetic sensor solves the problem of real-time and accurate statistics of water use in a closed environment, is easy to install, not easily disturbed, and has a simplified structure and complete functions, so that its production cost is effectively reduced and the data is safe and stable.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

The present invention is described with reference to the flowchart and/or block diagram of the method, device (system), and computer program product according to the embodiment of the present invention. It should be understood that each process and/or box in the flowchart and/or block diagram, as well as the combination of the process and/or box in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

Although preferred embodiments of the present invention have been described, additional changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (17)

1. A counter based on a magnetic sensor, characterized in that it comprises: a control module and a magnetic sensing module; The magnetic sensing module includes 2 ^N magnetic switch sensors and a magnet, where N is a positive integer greater than or equal to 1; The magnetic switch sensor is used to generate a pulse signal under the influence of the periodically changing magnetic field of the magnet; The control module is used to count based on the pulse signals generated by ^2N magnetic switch sensors. 2. The magnetic sensor-based counter according to claim 1, characterized in that the magnetic sensing module comprises two magnetic switch sensors, and the magnet comprises a south pole magnet and a north pole magnet; Under the influence of the magnetic field generated by the rotation of the magnet, the two magnetic switch sensors jointly generate a 00, 01, 10, 11 pulse signal in one cycle; The control module counts once for each cycle of 00, 01, 10, 11 pulse signals generated by the two magnetic switch sensors. 3. The magnetic sensor-based counter according to claim 1, characterized in that the magnetic sensing module comprises four magnetic switch sensors, and the magnet comprises a south pole magnet and a north pole magnet; Under the influence of the magnetic field generated by the rotation of the magnet, the four magnetic switch sensors jointly generate a cycle of 000, 001, 010, 011, 100, 101, 110, 111 pulse signals; The control module counts once for each cycle of 000, 001, 010, 011, 100, 101, 110, 111 pulse signals generated by the four magnetic switch sensors. 4. The magnetic sensor-based counter according to claim 2 or 3 is characterized in that the south pole magnet and the north pole magnet are installed on a rotating device to generate a periodically changing magnetic field driven by the rotation of the rotating device. 5. The magnetic sensor-based counter according to claim 4, characterized in that the rotating device comprises a wind wheel, a connecting rod and a rotating disk, the wind wheel and the rotating disk are connected to the connecting rod, and the connecting rod is located at the center of the rotating disk; The south pole magnet and the north pole magnet are installed on the turntable and are symmetrically distributed relative to the connecting rod; The wind wheel rotates under the force of the counting object to drive the south pole magnet and the north pole magnet on the rotating disk to rotate. 6. The magnetic sensor-based counter according to claim 5, characterized in that the magnetic sensing module comprises two magnetic switch sensors, and the angle between the two magnetic switch sensors and the center of the turntable is 90°. 7. The magnetic sensor-based counter according to claim 5 is characterized in that the magnetic sensing module comprises four magnetic switch sensors, and the angle intervals between the four magnetic switch sensors and the center of the turntable are 45° respectively. 8. The magnetic sensor-based counter according to claim 1, characterized in that the square wave duty cycle of the pulse signal generated by the magnetic switch sensor is 0.5. 9 . The magnetic sensor-based counter according to claim 1 , wherein the magnetic switch sensor is a TMR magnetic switch sensor. 10 . The magnetic sensor-based counter according to claim 1 , further comprising a display module, wherein the display module is used to display the count number of the control module. 11. The magnetic sensor-based counter according to claim 10, characterized in that the display module comprises an LED driving circuit and an LED light array; The LED driving circuit controls the on and off of the LED lamp array according to the logic signal output by the control module. 12. The magnetic sensor-based counter according to claim 11, characterized in that the control module comprises a clock unit, and the clock unit is used to provide a logic signal for driving the LED lamp array to turn on and off sequentially to the LED driving circuit. 13. The magnetic sensor-based counter according to claim 12, wherein the clock unit comprises a comparator, a trigger and a selector; The comparator is used to convert the analog signal generated by the magnetic switch sensor into a pulse signal; The trigger is used to adjust the duty cycle of the pulse signal to obtain pulse periods with different frequency divisions; The selector is used to select the pulse period of the corresponding frequency division to obtain a logic signal for driving the LED lamp array to turn on and off sequentially. 14. The magnetic sensor-based counter according to claim 13, characterized in that the trigger is composed of two D triggers to obtain a pulse period with a frequency division of 2; or the trigger is composed of three D triggers and two NAND gates to obtain a pulse period with a frequency division of 6. 15. A counting method, characterized in that the counting method adopts the magnetic sensor-based counter according to any one of claims 1 to 14 for counting. 16. A chip, characterized in that the chip comprises the magnetic sensor-based counter according to any one of claims 1 to 14. 17. An electronic device, characterized in that the electronic device comprises the magnetic sensor-based counter according to any one of claims 1 to 14.