A method and device for monitoring mechanical start-stop based on dual-mode detection of vibration and magnetic field.

Abstract

This invention provides a method and device for monitoring the start and stop of machinery based on dual-mode vibration and magnetic field detection. The method includes: acquiring a first signal to detect the vibration of the machinery; if no vibration is detected, the machinery is determined to be in a stopped state; if vibration is detected, the first signal is processed, and the processing result is verified; if the verification passes, the machinery is determined to be in a started state; if the verification fails, a second signal is further acquired to detect whether the magnetic field around the machinery is stable; if the magnetic field is stable, the machinery is determined to be in a stopped state; if the magnetic field is unstable, the machinery is determined to be in a started state. This invention, based on a dual-mode vibration and magnetic field detection scheme, comprehensively judges whether the machinery is started, thereby improving the stability and reliability of monitoring; at the same time, the scheme of this invention can also achieve non-invasive detection, greatly improving detection efficiency and portability.

Description

Technical Field

[0001] This invention relates to the field of mechanical monitoring technology, and more specifically, to a method and apparatus for monitoring the start and stop of machinery based on dual-mode detection of vibration and magnetic field. Background Technology

[0002] Non-road mobile machinery includes large pieces of equipment such as excavators, bulldozers, loaders, road rollers, pavers, graders, trenchers, piling machinery, forklifts, cranes, loading and unloading machinery, and tractors. Their emissions far exceed those of ordinary motor vehicles; statistics show that the emissions from one machine are equivalent to those from dozens of ordinary cars. Therefore, the supervision of non-road mobile machinery operations is a crucial aspect of current air pollution control.

[0003] Currently, in order to achieve real-time monitoring of the working status of non-road mobile machinery, such as monitoring its location, working status, and working duration, in order to ensure operational safety and overall management, the commonly used technical solutions are manual inspection or installing smart cloud boxes inside these machines. The smart cloud boxes are interconnected with the user's mobile application (APP) to transmit the collected data to the mobile terminal, thereby realizing remote monitoring.

[0004] However, manual inspections are inefficient and difficult to detect unauthorized startups in real time. The monitoring method using smart cloud boxes also has a significant drawback: the overall installation process of the cloud box is cumbersome and requires wiring and fixing inside the vehicle, which results in relatively low ease of installation and use. In addition, the smart cloud box exposed inside the device is also susceptible to human damage, which will directly cause the monitoring function to fail.

[0005] Therefore, there is an urgent need to design a new monitoring solution that does not require deep penetration into the vehicle, is easy to install, and is more resistant to interference or damage, so as to achieve continuous and reliable real-time monitoring of non-road mobile machinery. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies in monitoring non-road mobile machinery, such as low efficiency, cumbersome procedures, and poor reliability, this invention provides a method and device for monitoring the start and stop of machinery based on dual-mode vibration and magnetic field detection. The dual-mode detection scheme comprehensively judges whether the machinery has started, thereby improving the stability and reliability of monitoring. At the same time, the scheme of this invention can also achieve non-invasive detection, which greatly improves detection efficiency and portability.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0008] A mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field includes the following steps:

[0009] S1: Acquire the first signal and detect the vibration of the machine based on the first signal;

[0010] If vibration is detected, the first signal is processed to obtain the data processing result, and step S2 is executed; if no vibration is detected, the machine is determined to be in a stopped state.

[0011] S2: Verify the data processing result. If the verification passes, determine that the machine is in the start-up state; if the verification fails, proceed to step S3.

[0012] S3: Acquire the second signal and detect whether the magnetic field around the machine is stable based on the second signal;

[0013] If the magnetic field is stable, the machine is determined to be in a stopped state; if the magnetic field is unstable, the machine is determined to be in a started state.

[0014] Preferably, the first signal is acceleration data; the second signal is magnetic field data.

[0015] Preferably, in step S1, the variance of the acceleration data is calculated. If the variance is greater than or equal to a preset vibration threshold within a continuous first time window, then vibration is determined to be detected.

[0016] Preferably, in step S3, the standard deviation of the magnetic field strength is calculated. If the standard deviation is less than or equal to a preset magnetic field stability threshold within a continuous second time window, the magnetic field is determined to be stable.

[0017] Preferably, in step S1, after vibration is detected, the first signal is subjected to fast Fourier transform processing to obtain data processing results.

[0018] Preferably, in step S2, verifying the data processing result includes:

[0019] Spectral analysis is performed on the data processing results to extract the low-frequency and high-frequency components.

[0020] If the proportion of the low-frequency component is greater than the proportion of the high-frequency component, the verification passes; otherwise, the verification fails.

[0021] The present invention also provides a mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field. The device is fixedly installed on the surface of the machine and includes: a first sensor, a second sensor, a processor, a communication module and a power supply module.

[0022] The first sensor and the second sensor are used to collect the first signal and the second signal, respectively, and send them to the processor.

[0023] The processor is configured to perform the steps of the above method, obtain the start-stop status of the machine, and send it to the user through the communication module;

[0024] The power supply module is used to supply power to the device.

[0025] Preferably, the first sensor is a vibration sensor, and the first signal collected is acceleration data;

[0026] The second sensor is specifically a magnetometer, and the second signal it collects is specifically magnetic field data.

[0027] Preferably, the power supply module is provided with at least one or more of the following: a storage battery, a solar cell, and a backup storage battery;

[0028] Specifically, the storage battery and solar cell are used to power the device under normal circumstances, and the backup storage battery is used to power the device in an emergency.

[0029] Preferably, the device further includes a magnetic anti-disassembly module for real-time detection of the adsorption state and spatial displacement of the device with the mechanical surface. When abnormal separation or displacement is detected, the processor is triggered to send an abnormal disassembly alarm to the user through the communication module.

[0030] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0031] This invention provides a method and device for monitoring the start and stop of machinery based on dual-mode detection of vibration and magnetic field. First, a first signal is acquired to detect the vibration of the machinery. If no vibration is detected, the machinery is determined to be in a stopped state. If vibration is detected, the first signal is processed, and the processing result is verified. If the verification passes, the machinery is determined to be in a started state. If the verification fails, a second signal is further acquired to detect whether the magnetic field around the machinery is stable. If the magnetic field is stable, the machinery is determined to be in a stopped state; if the magnetic field is unstable, the machinery is determined to be in a started state.

[0032] This invention innovatively integrates vibration spectrum analysis and magnetic field stability criteria through a dual-mode collaborative detection mechanism of vibration and magnetic field. Compared with traditional single-sensor solutions, it overcomes interference and misjudgment caused by factors such as vibration in rainy weather, effectively improving the monitoring accuracy and reliability of mechanical start-up and shutdown. Simultaneously, this invention employs non-intrusive installation, directly mounting on the mechanical surface without wiring or damage to the internal structure, resulting in high deployment efficiency and completely solving the pain point of cumbersome installation of traditional built-in devices. Furthermore, this invention incorporates a magnetic anti-tamper alarm function, automatically triggering a cloud alarm when encountering illegal removal by real-time monitoring of abnormal separation and physical displacement. This achieves a closed-loop defense from physical protection to digital supervision, providing highly reliable, maintenance-free, all-weather monitoring support for non-road machinery supervision. Attached Figure Description

[0033] Figure 1 This is a flowchart of a mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field provided in Example 1.

[0034] Figure 2 This is a flowchart of a mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field provided in Example 2.

[0035] Figure 3 This is a structural diagram of a mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field provided in Example 3.

[0036] Figure 4 This is a structural diagram of a mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field provided in Example 4. Detailed Implementation

[0037] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this application.

[0038] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions;

[0039] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings.

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] like Figure 1 As shown, this embodiment provides a mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field, including the following steps:

[0043] S1: Acquire the first signal and detect the vibration of the machine based on the first signal;

[0044] If vibration is detected, the first signal is processed to obtain the data processing result, and step S2 is executed; if no vibration is detected, the machine is determined to be in a stopped state.

[0045] S2: Verify the data processing result. If the verification passes, determine that the machine is in the start-up state; if the verification fails, proceed to step S3.

[0046] S3: Acquire the second signal and detect whether the magnetic field around the machine is stable based on the second signal;

[0047] If the magnetic field is stable, the machine is determined to be in a stopped state; if the magnetic field is unstable, the machine is determined to be in a started state.

[0048] In the specific implementation process, the first signal is collected to detect mechanical vibration. In this embodiment, the first signal is used to detect vibration, and the specific detection methods can be: 1) Piezoelectric vibration sensor: using the piezoelectric effect to convert mechanical vibration into an electrical signal; 2) Mechanical vibration sensor: the traditional vibration detection method, relying on the relative motion of a spring and a mass block to detect vibration; 3) Miniature vibration sensor: miniaturizing the mechanical sensor, suitable for applications with limited space in this embodiment; 4) Displacement sensor: achieving high-precision vibration amplitude measurement by measuring the displacement of the object; 5) Accelerometer sensor: achieving vibration detection by real-time monitoring of acceleration changes.

[0049] If no vibration is detected, the machine is determined to be in a stopped state;

[0050] If vibration is detected, the first signal is processed, and the processing result is verified. The purpose of data processing and verification is to review the detection results based on the first signal and avoid environmental interference and misjudgment.

[0051] If the verification passes, the machine is determined to be in the start-up state;

[0052] If the verification fails, a second signal is further acquired to detect whether the magnetic field around the machine is stable. In this embodiment, the second signal is used to detect the magnetic field, and the specific detection methods can be: 1) Hall effect sensor: using the Hall effect principle to measure the magnetic field strength and direction; 2) Magnetoresistive sensor: based on the magnetoresistive effect, the resistance changes with the magnetic field; 3) Magnetic induction sensor: measuring the magnetic field through the principle of electromagnetic induction; 4) Magnetic integrated sensor: integrating multiple magnetic field sensors together to provide higher accuracy and functionality.

[0053] If a stable magnetic field is detected, it indicates that there is a misjudgment in the detection result of the first signal, and the machine is determined to be in a stopped state.

[0054] If the magnetic field is unstable, the machine is determined to be in the starting state;

[0055] This method is based on a dual-mode detection scheme of vibration and magnetic field to comprehensively determine whether the machine has started, thereby improving the stability and reliability of monitoring.

[0056] Example 2

[0057] like Figure 2 As shown, this embodiment provides a mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field, including the following steps:

[0058] S1: Acquire the first signal and detect the vibration of the machine based on the first signal;

[0059] If vibration is detected, the first signal is processed to obtain the data processing result, and step S2 is executed; if no vibration is detected, the machine is determined to be in a stopped state.

[0060] S2: Verify the data processing result. If the verification passes, determine that the machine is in the start-up state; if the verification fails, proceed to step S3.

[0061] S3: Acquire the second signal and detect whether the magnetic field around the machine is stable based on the second signal;

[0062] If the magnetic field is stable, the machine is determined to be in a stopped state; if the magnetic field is unstable, the machine is determined to be in a started state.

[0063] The first signal is specifically acceleration data; the second signal is specifically magnetic field data.

[0064] In step S1, the variance of the acceleration data is calculated. If the variance is greater than or equal to a preset vibration threshold within a continuous first time window, it is determined that vibration has been detected.

[0065] In step S3, the standard deviation of the magnetic field strength is calculated. If the standard deviation is less than or equal to the preset magnetic field stability threshold in a continuous second time window, the magnetic field is determined to be stable.

[0066] In step S1, after vibration is detected, the first signal is subjected to fast Fourier transform processing to obtain data processing results.

[0067] In step S2, the data processing result is verified, including:

[0068] Spectral analysis is performed on the data processing results to extract the low-frequency and high-frequency components.

[0069] If the proportion of the low-frequency component is greater than the proportion of the high-frequency component, the verification passes; otherwise, the verification fails.

[0070] In the specific implementation process, the first signal is collected to detect the vibration of the machine. In this embodiment, the first signal is an acceleration signal. An acceleration sensor is used to monitor the acceleration change in real time, thereby realizing vibration detection. The acceleration sensor has the characteristics of mature manufacturing process, large dynamic range, wide frequency range, good linearity, high stability and convenient installation. It is often used in modal testing of small and medium-sized structures, automobile testing, fault diagnosis testing of rotating machinery and vibration control testing, and is very suitable for the detection scenario of this embodiment.

[0071] After collecting acceleration data, the variance of the acceleration data is calculated. If the calculated variance is greater than or equal to a preset vibration threshold within a continuous first time window, it is determined that vibration has been detected.

[0072] If no vibration is detected, the machine is determined to be in a stopped state;

[0073] If vibration is detected, the first signal is processed, and the processing result is verified. The purpose of data processing and verification is to review the detection results based on the first signal and avoid environmental interference and misjudgment. In this embodiment, the acquired first signal is processed by Fast Fourier Transform (FFT) to obtain the processing result. Then, the data processing result is subjected to spectrum analysis to extract low-frequency and high-frequency components. Since most mechanical vibrations are low-frequency vibrations, if the proportion of low-frequency components is greater than that of high-frequency components, the verification is passed, and the machine is determined to be in the start-up state.

[0074] If the high-frequency component accounts for a larger proportion, it indicates that the vibration may be caused by environmental interference such as rain, making it impossible to accurately determine whether the machine has started. In this case, the verification fails, and further methods are needed to determine the mechanical status.

[0075] Since the machine will interfere with the magnetic field around it when it starts up, this embodiment innovatively introduces magnetic field detection when the verification fails, and further collects a second signal to detect whether the magnetic field around the machine is stable; in this embodiment, the second signal is magnetic field data, which is collected by a magnetic field sensor.

[0076] After collecting the magnetic field data, the standard deviation of the magnetic field strength is calculated. If the standard deviation of the magnetic field data is less than or equal to the preset magnetic field stability threshold within a continuous second time window, the magnetic field is determined to be stable. In this case, it indicates that the detection result of the first signal is misjudged, and the machine is determined to be in a shutdown state.

[0077] If the magnetic field is unstable, the machine is determined to be in the starting state;

[0078] This method is based on a dual-mode detection scheme of vibration and magnetic field to comprehensively determine whether the machine has started, thereby improving the stability and reliability of monitoring.

[0079] Example 3

[0080] like Figure 3 As shown, this embodiment provides a mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field. The device is fixedly installed on the mechanical surface and includes: a first sensor, a second sensor, a processor, a communication module, and a power supply module.

[0081] The first sensor and the second sensor are used to collect the first signal and the second signal, respectively, and send them to the processor.

[0082] The processor is configured to perform the steps of the method described in Embodiment 1 or 2, obtain the start-stop status of the machine, and send it to the user through the communication module;

[0083] The power supply module is used to supply power to the device.

[0084] In the specific implementation process, the entire device is first fixed on the mechanical surface. In this embodiment, the device can be fixed by magnetic attraction, screw fixing, glue fixing or other methods. This embodiment does not make specific limitations here.

[0085] The entire device is then powered by a power supply module, eliminating the need for an external power source and making deployment more convenient and faster.

[0086] Then, the first sensor is used to collect the first signal and send it to the processor. After receiving the first signal, the processor detects the vibration of the machine. If no vibration is detected, the machine is determined to be in a stopped state. If vibration is detected, the first signal is processed and the data processing result is verified. If the verification passes, the machine is determined to be in a started state.

[0087] If the verification fails, a second sensor is used to collect a second signal to detect whether the magnetic field around the machine is stable. If the magnetic field is stable, the machine is determined to be in a stopped state; if the magnetic field is unstable, the machine is determined to be in a started state.

[0088] After the processor obtains the start / stop status of the machine, it sends it to the user through the communication module to achieve real-time monitoring;

[0089] This device innovatively integrates vibration spectrum analysis and magnetic field stability criteria through a dual-mode collaborative detection mechanism of vibration and magnetic field. Compared with traditional single-sensor solutions, it overcomes interference and misjudgment caused by factors such as vibration in rainy weather, effectively improving the monitoring accuracy and reliability of mechanical start-up and shutdown. At the same time, this device adopts non-invasive installation, directly installed on the surface of the machine, without the need for wiring or damage to the internal structure of the machine, resulting in high deployment efficiency and completely solving the pain point of cumbersome installation of traditional built-in equipment.

[0090] Example 4

[0091] like Figure 4 As shown, this embodiment provides a mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field. The device is fixedly installed on the mechanical surface and includes: a first sensor, a second sensor, a processor, a communication module, a power supply module, and a magnetic anti-tamper module.

[0092] The first sensor and the second sensor are used to collect the first signal and the second signal, respectively, and send them to the processor.

[0093] The processor is configured to perform the steps of the method described in Embodiment 1 or 2, obtain the start-stop status of the machine, and send it to the user through the communication module;

[0094] The power supply module is used to supply power to the device;

[0095] The magnetic anti-disassembly module is used to detect the adsorption state and spatial displacement of the device and the mechanical surface in real time. When abnormal separation or displacement is detected, the processor is triggered to send an abnormal disassembly alarm to the user through the communication module.

[0096] The first sensor is specifically a vibration sensor, and the first signal collected is specifically acceleration data;

[0097] The second sensor is specifically a magnetometer, and the second signal it collects is specifically magnetic field data;

[0098] The power supply module is equipped with at least one or more of the following: a storage battery, a solar cell, and a backup storage battery.

[0099] Specifically, the storage battery and solar cell are used to power the device under normal circumstances, and the backup storage battery is used to power the device in an emergency.

[0100] In the specific implementation process, the entire device is first fixed on the mechanical surface. In this embodiment, the device is fixed by a combination of magnetic attraction and glue. Specifically, the device in this embodiment is provided with an electromagnetic shielding shell that covers the outside of each module. The surface of the shell is coated with an anti-corrosion coating and glue for fixing. A magnetic base is also provided inside the shell, which has a built-in permanent magnet array that is magnetically attracted to the mechanical metal surface.

[0101] The entire device is then powered by a power supply module, eliminating the need for an external power source and making deployment more convenient and faster. In this embodiment, the power supply module includes a storage battery, a solar cell, and a backup battery. The storage battery and solar cell are located in visible parts of the device, such as in the battery compartment, to power the device under normal conditions. When the device's power is insufficient, there is no need to stop charging; continuous power supply can be achieved by replacing the storage battery or solar cell. The backup battery is installed in an invisible part of the device to power the device in emergencies (such as when both the storage battery and solar cell are damaged), preventing the device from being damaged by human intervention and causing monitoring failure.

[0102] In the specific monitoring process, the first sensor is used to collect the first signal and send it to the processor. After receiving the first signal, the processor detects the vibration of the machine. If no vibration is detected, the machine is determined to be in a stopped state. If vibration is detected, the first signal is processed and the data processing result is verified. If the verification is successful, the machine is determined to be in a started state. In this embodiment, the first sensor is a vibration sensor, and the first signal collected is specifically acceleration data.

[0103] If the verification fails, a second sensor is used to collect a second signal to detect whether the magnetic field around the machine is stable. If the magnetic field is stable, the machine is determined to be in a stopped state. If the magnetic field is unstable, the machine is determined to be in a started state. In this embodiment, the second sensor is a magnetometer, and the collected second signal is specifically magnetic field data.

[0104] After the processor obtains the start / stop status of the machine, it sends it to the user through the communication module to achieve real-time monitoring;

[0105] In addition, to further prevent human-caused damage from causing regulatory failure, this embodiment also includes a magnetic anti-tamper module, which includes a Hall sensor and a gyroscope, used to monitor the adsorption state and spatial displacement of the device and the mechanical surface in real time, respectively; when abnormal separation or displacement is detected, the processor is triggered to send an abnormal disassembly alarm to the user through the communication module.

[0106] Specifically, Hall effect sensors are used to monitor changes in the magnetic field strength of the magnetic base. When the magnetic attraction weakens beyond a certain threshold (e.g., 10%), , The initial magnetic field strength of the magnetic base indicates that the disturbance was caused by human intervention; the gyroscope is used to detect the three-dimensional attitude angle of the device. When the device is illegally rotated or translated beyond a certain angle (e.g., 15°), If any of the above situations occur, it will be determined as illegal dismantling by human intervention; when any of the above situations occur, an alarm will be triggered to prevent the device from being forcibly removed.

[0107] In this embodiment, the communication module can be equipped with wireless transmission methods such as 4G / NB-IoT to achieve data transmission with excellent coverage, high transmission rate and high security. This embodiment does not impose specific limitations.

[0108] This device innovatively integrates vibration spectrum analysis and magnetic field stability criteria through a dual-mode collaborative detection mechanism of vibration and magnetic field. Compared with traditional single-sensor solutions, it overcomes interference and misjudgment caused by factors such as vibration in rainy weather, effectively improving the monitoring accuracy and reliability of mechanical start-up and shutdown. Simultaneously, the device employs non-intrusive installation, directly mounting on the mechanical surface without wiring or damage to the internal structure, resulting in high deployment efficiency and completely solving the pain point of cumbersome installation of traditional built-in equipment. Furthermore, the device is equipped with a magnetic anti-tamper alarm function. By monitoring abnormal separation and physical displacement in real time, it automatically triggers audible and visual alarms and cloud-based alerts when unauthorized removal is encountered, achieving a closed-loop defense from physical protection to digital supervision, providing highly reliable, maintenance-free, all-weather monitoring support for non-road machinery supervision.

[0109] The same or similar labels correspond to the same or similar parts;

[0110] The terms used to describe positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this application.

[0111] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field, characterized in that, Includes the following steps: S1: Acquire the first signal and detect the vibration of the machine based on the first signal; If vibration is detected, the first signal is processed to obtain the data processing result, and step S2 is executed; if no vibration is detected, the machine is determined to be in a stopped state. S2: Verify the data processing result. If the verification passes, determine that the machine is in the start-up state. If the verification fails, proceed to step S3; The verification of the data processing results includes: Spectral analysis is performed on the data processing results to extract the low-frequency and high-frequency components. If the proportion of the low-frequency component is greater than the proportion of the high-frequency component, the verification passes; otherwise, the verification fails. S3: Acquire the second signal and detect whether the magnetic field around the machine is stable based on the second signal; If the magnetic field is stable, the machine is determined to be in a stopped state; if the magnetic field is unstable, the machine is determined to be in a started state.

2. The mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field as described in claim 1, characterized in that, The first signal is specifically acceleration data; the second signal is specifically magnetic field data.

3. The mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field as described in claim 2, characterized in that, In step S1, the variance of the acceleration data is calculated. If the variance is greater than or equal to a preset vibration threshold within a continuous first time window, it is determined that vibration has been detected.

4. The mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field as described in claim 2, characterized in that, In step S3, the standard deviation of the magnetic field strength is calculated. If the standard deviation is less than or equal to the preset magnetic field stability threshold within a continuous second time window, the magnetic field is determined to be stable.

5. The mechanical start-stop monitoring method based on dual-mode detection of vibration and magnetic field as described in claim 1, characterized in that, In step S1, after vibration is detected, the first signal is processed by fast Fourier transform to obtain the data processing result.

6. A mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field, characterized in that, The device is fixedly mounted on the mechanical surface and includes: a first sensor, a second sensor, a processor, a communication module, and a power supply module; The first sensor and the second sensor are used to collect the first signal and the second signal, respectively, and send them to the processor. The processor is configured to perform the steps of the method according to any one of claims 1 to 5, obtain the start-stop status of the machine, and send it to the user through the communication module; The power supply module is used to supply power to the device.

7. A mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field as described in claim 6, characterized in that, The first sensor is specifically a vibration sensor, and the first signal collected is specifically acceleration data; The second sensor is specifically a magnetometer, and the second signal it collects is specifically magnetic field data.

8. A mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field as described in claim 6, characterized in that, The power supply module is equipped with at least one or more of the following: a storage battery, a solar cell, and a backup storage battery.

9. A mechanical start-stop monitoring device based on dual-mode detection of vibration and magnetic field as described in any one of claims 6 to 8, characterized in that, The device also includes a magnetic anti-disassembly module, which is used to detect the adsorption state and spatial displacement of the device with the mechanical surface in real time. When abnormal separation or displacement is detected, the processor is triggered to send an abnormal disassembly alarm to the user through the communication module.

Images