Real-time monitoring method and monitoring circuit based on voltage waveform

Abstract

The invention provides a real-time monitoring method and monitoring circuit based on a voltage waveform. The real-time monitoring method based on the voltage waveform comprises the following steps: acquiring a real-time output voltage waveform of a switching power supply; determining whether the fluctuation of the real-time output voltage waveform relative to a preset output voltage waveform is within a preset range or not; and if the fluctuation of the real-time output voltage waveform relative to the preset output voltage waveform is out of the preset range, cutting off the power supply of the switching power supply to the connected load. Whether the load has a fault can be monitored in real time, so that the fault of the load can be found in time.

Description

Technical Field

[0001] The present invention relates to the technical field of switching power supplies, and in particular to a real-time monitoring method and a monitoring circuit based on a voltage waveform. Background Art

[0002] The switching power supply is mainly used to supply power to the connected loads. A switching power supply can be connected to one or more loads. When the switching power supply is connected to multiple loads, if one load is damaged, it may cause other loads to be damaged one after another, posing a safety hazard. In response to the above problems, the commonly used solution is for the staff to conduct regular maintenance. However, this method is inefficient and has a certain lag, and it is impossible to detect damaged loads in time. Summary of the invention

[0003] The present invention provides a real-time monitoring method and a monitoring circuit based on a voltage waveform, aiming to solve the current problem that a load fault cannot be discovered in time.

[0004] In a first aspect, the present invention provides a real-time monitoring method based on a voltage waveform, the real-time monitoring method based on a voltage waveform comprising:

[0005] Get the real-time output voltage waveform of the switching power supply;

[0006] confirming whether the fluctuation of the real-time output voltage waveform compared with the preset output voltage waveform is within a preset range;

[0007] If the fluctuation of the real-time output voltage waveform compared with the preset output voltage waveform is outside the preset range, the switching power supply is disconnected from supplying power to the connected load.

[0008] In a second aspect, the present invention provides a real-time monitoring circuit based on a voltage waveform, and the real-time monitoring circuit based on a voltage waveform includes a data acquisition module, a switch module and a control module; the data acquisition module is connected to the output end of the switching power supply, and is used to collect the output voltage of the switching power supply and generate real-time point cloud data according to the output voltage, and is used to confirm whether there is a fault in the load module according to the real-time point cloud data and the preset point cloud data and output a corresponding comparison result; the switch module is connected to the load module, and is used to control the conduction and shutdown of the load module; the control module is respectively connected to the data acquisition module and the switch module, and is used to control the conduction and shutdown of the load module according to the comparison result.

[0009] Furthermore, it also includes a point cloud comparison module; the input end of the point cloud comparison module is connected to the voltage acquisition module, and the output end of the point cloud comparison module is connected to the control module.

[0010] The present invention discloses a real-time monitoring method and a monitoring circuit based on a voltage waveform. The monitoring method includes obtaining a real-time output voltage waveform of a switching power supply; confirming whether the fluctuation of the real-time output voltage waveform compared to a preset output voltage waveform is within a preset range; if the fluctuation of the real-time output voltage waveform compared to the preset output voltage waveform is outside the preset range, then disconnecting the power supply of the switching power supply to the connected load. The embodiment of the present invention can obtain the real-time output voltage waveform of the switching power supply when the switching power supply is working, and compare the real-time output voltage waveform with the preset output voltage waveform. When the fluctuation of the real-time output voltage waveform compared to the preset output voltage waveform is outside the preset range, it indicates that at least one load connected to the switching power supply has a fault, and the switching power supply can be controlled to disconnect the power supply to all loads to protect the safety of the loads, and the potential safety hazards can be eliminated in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0012] Figure 1 is a flow chart of a real-time monitoring method based on voltage waveform provided by an embodiment of the present invention;

[0013] Figure 2 is a first sub-flow chart of a real-time monitoring method based on voltage waveform provided by an embodiment of the present invention;

[0014] Figure 3 is a second sub-flow chart of a real-time monitoring method based on a voltage waveform provided by an embodiment of the present invention;

[0015] Figure 4 is a third sub-flow chart of a real-time monitoring method based on a voltage waveform provided by an embodiment of the present invention;

[0016] Figure 5 is a fourth sub-flow chart of a real-time monitoring method based on a voltage waveform provided by an embodiment of the present invention;

[0017] Figure 6 is a fifth sub-flow chart of a real-time monitoring method based on a voltage waveform provided by an embodiment of the present invention;

[0018] Figure 7 is a sixth sub-flow chart of a real-time monitoring method based on a voltage waveform provided by an embodiment of the present invention;

[0019] Figure 8It is a block diagram of a real-time monitoring circuit based on voltage waveform provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, operations, elements, components and / or groups thereof.

[0022] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, the singular forms of "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0023] In addition, the directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only for reference to the directions of the attached drawings and the use status of the product. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention. In addition, in the drawings, structures with similar or identical structures are represented by the same reference numerals.

[0024] See also Figure 1 The present invention provides a real-time monitoring method based on a voltage waveform. The real-time monitoring method based on a voltage waveform can be applied to a real-time monitoring circuit based on a voltage waveform, and is used to monitor the real-time waveform of a switching power supply to confirm whether a load fault occurs. The real-time monitoring method based on a voltage waveform includes S110-S130.

[0025] S110, obtaining a real-time output voltage waveform of the switching power supply.

[0026] In an embodiment of the present invention, the switching power supply can be connected to the load module through a transformer, and the load module includes at least one load. That is, the switching power supply can be connected to one load at the same time, or it can be connected to multiple loads at the same time. It can be understood that the load here can refer to multiple different loads in an electronic device, or it can be multiple independent loads.

[0027] When the device starts, that is, the switching power supply starts to supply power to all loads, the real-time output voltage waveform of the switching power supply can be obtained, and the real-time output voltage waveform refers to the real-time waveform of the output voltage of the switching power supply. For example, a voltage acquisition module can be provided, which is connected to the output end of the switching power supply and is used to acquire the real-time output voltage waveform of the switching power supply.

[0028] S120, confirming whether the fluctuation of the real-time output voltage waveform compared with the preset output voltage waveform is within a preset range.

[0029] In an embodiment of the present invention, the preset output voltage waveform is the waveform of the output voltage of the switching power supply when all loads are in a normal state. For example, for a certain device, it is provided with three loads, and the three loads will be started at the same time when the device is started, then the preset output voltage waveform is the waveform when the three loads are started normally. When the device is started, under normal circumstances, the switching power supply supplies power to all loads at the same time, that is, the preset output voltage waveform is the waveform when the switching power supply supplies power to all loads normally at the same time. For some special devices, if one or several loads do not run when the device is started, and only run under special circumstances, then the preset output voltage waveform is the waveform of the load that is started synchronously when the device is started. For example, for a certain device, it is provided with three loads, when the device is started, only two of the loads are started, and the other load is generally not started, then the preset output voltage waveform is the waveform when the two loads are started normally. In addition, the number of preset output voltage waveforms can be multiple, used to correspond to different numbers of loads. For example, in the above example, two preset output voltage waveforms can be provided, one corresponding to two loads started at the same time, and the other corresponding to three loads started at the same time.

[0030] After obtaining the preset output voltage waveform, the real-time output voltage waveform is compared with the preset output voltage waveform to see whether the fluctuation is outside the preset range. The preset range is an empirical value, and the preset range of different devices is also different. Generally speaking, for a device with a large load, its fluctuation range is larger, and the corresponding preset range is also larger, while for a device with a small load, its fluctuation range is smaller, and the corresponding preset range is also smaller.

[0031] S130: If the fluctuation of the real-time output voltage waveform compared with the preset output voltage waveform is outside the preset range, disconnecting the switching power supply from supplying power to the connected load.

[0032] In an embodiment of the present invention, when the real-time output voltage waveform fluctuates outside a preset range compared to the preset output voltage waveform, it indicates that the waveform of the output voltage of the switching power supply fluctuates greatly and a load fault exists. Therefore, the switching power supply to all loads can be disconnected to ensure the safety of the equipment, thereby promptly detecting load faults.

[0033] See also Figure 2 In some embodiments, such as in this embodiment, the method may further include steps S140-S150.

[0034] S140, confirming the fault type of the load according to the real-time output voltage waveform and the preset output voltage waveform;

[0035] S150: If the fault type of the load is a circuit breaker fault, enter a load self-check mode to confirm the presence of a faulty load.

[0036] In the embodiment of the present invention, after confirming that the load has a fault, the fault type can be further confirmed, that is, the real-time output voltage waveform and the preset output voltage waveform can be compared to further confirm the fault type. The fault type of the load fault can be divided into open circuit and short circuit, and the fault type can be confirmed by the waveform as a short circuit fault or an open circuit fault.

[0037] When the fault type of the load is a circuit breaker fault, the load self-test mode can be entered to confirm the faulty load. For example, if there are three loads connected to the switching power supply, when the load self-test mode is entered, the three loads will be tested one by one to confirm the specific load that has failed. It can be understood that when there is only one load, it can be directly confirmed as the faulty load without entering the load self-test mode.

[0038] See also Figure 3 In some embodiments, such as in this embodiment, the method may further include step S160.

[0039] S160: If the fault type of the load is a short circuit fault, output a warning message.

[0040] In an embodiment of the present invention, when the fault type of the load is a short circuit fault, warning information can be output to the display module through the communication module, and relevant information can be displayed through the display module to facilitate staff to understand the load situation.

[0041] See also Figure 4 In some embodiments, such as in the present embodiment, the step S130 may include steps S141-S142.

[0042] S141, acquiring real-time point cloud data based on the real-time output voltage waveform, and acquiring preset point cloud data based on the preset output voltage waveform;

[0043] S142: confirming the fault type of the load according to the real-time point cloud data and the preset point cloud data.

[0044] In an embodiment of the present invention, after obtaining the real-time output voltage waveform and the preset output voltage waveform, real-time point cloud data can be obtained according to the real-time output voltage waveform, and preset point cloud data can be obtained according to the preset output voltage waveform. For example, a point cloud comparison module can be provided, which can convert the real-time output voltage waveform into real-time point cloud data on the one hand, and can convert the preset output voltage waveform into preset point cloud data on the other hand.

[0045] After obtaining the real-time point cloud data and the preset point cloud data, the fault type of the load is confirmed by comparing the difference between the real-time point cloud data and the preset point cloud data. In addition, before confirming the fault type, the real-time point cloud data can also be smoothed to improve accuracy.

[0046] See also Figure 5 In some embodiments, such as in this embodiment, step S140 may include steps S1421-S1422.

[0047] S1421, obtaining a real-time extreme point voltage mean value corresponding to a peak area in the real-time point cloud data, and obtaining a preset extreme point voltage mean value corresponding to a peak area in the preset point cloud data;

[0048] S1422: If the difference between the real-time extreme point voltage average and the preset extreme point voltage average is greater than or equal to a first preset threshold, it is determined that the fault type of the load is a short circuit.

[0049] In an embodiment of the present invention, after obtaining the real-time point cloud data, the point cloud area where the voltage rises to the highest point in the real-time point cloud data can be extracted, and correspondingly, the corresponding point cloud area in the preset point cloud data can be extracted. Then, the mean of all extreme point voltages in the extracted point cloud area is obtained to obtain the real-time extreme point voltage mean and the preset extreme point voltage mean. Finally, the fault type of the load is confirmed according to the real-time extreme point voltage mean and the preset extreme point voltage mean.

[0050] For example, if the real-time extreme point voltage mean is X, and the preset extreme point voltage mean is X1, then the difference between X and X1 can be calculated. If X-X1=A, where A is a negative number, then the absolute value of A is taken, and then the size between A and the first preset threshold is compared. If A is greater than or equal to the first preset threshold, it indicates that the fault type of the load is a short circuit. For example, if the first preset threshold is a, then when A≥a, it indicates that the fault type of the load is a short circuit.

[0051] See also Figure 6 In some embodiments, such as in the present embodiment, the step S140 may include step S1423.

[0052] S1423: If the difference between the real-time extreme point voltage average and the preset extreme point voltage average is less than the first preset threshold and greater than or equal to the second preset threshold, it is confirmed that the fault type of the load is open circuit.

[0053] In the embodiment of the present invention, taking the above example as an example, that is, the real-time extreme point voltage mean is X, the preset extreme point voltage mean is X1, X-X1=A, the first preset threshold is a, and the second preset threshold is b, then when the difference between the real-time extreme point voltage mean and the preset extreme point voltage mean is between the second preset threshold and the first preset threshold, it indicates that the fault type of the load is open circuit. For example, when b≤A<a, the fault type of the load is open circuit.

[0054] See also Figure 7 In some embodiments, such as in the present embodiment, the step S150 may include steps S151-S155.

[0055] S151, confirming whether the switch power supply disconnects the power supply to all the loads;

[0056] S152, if the switching power supply cuts off the power supply to all the loads, controlling the switching power supply to restore the power supply to one of the loads;

[0057] S153, after the switching power supply resumes supplying power to the load, confirming whether the output waveform of the switching power supply changes;

[0058] S154, if the output waveform of the switching power supply changes, confirming that the load is normal;

[0059] S155, if the output waveform of the switching power supply does not change, it is confirmed that the load is short-circuited.

[0060] In an embodiment of the present invention, when entering the load self-test mode, it indicates that there is a fault in the load, and the fault type is open circuit. After entering the load self-test mode, first confirm whether the switching power supply disconnects the power supply to all loads. If the switching power supply does not disconnect the power supply to all loads, the switching power supply can be controlled to disconnect the power supply to all loads. For example, a switch module can be provided between the load and the switching power supply, and the switch module can be used to control the switching power supply to supply power to the load.

[0061] After the switch power supply is disconnected from the load, the switch power supply is controlled to supply power to one of the multiple loads, and after the switch power supply is restored to supply power to the load, it is confirmed whether the output waveform of the switch power supply has changed. If the output waveform of the switch power supply has changed, it indicates that the load is normal. If the output waveform of the switch power supply has not changed, it indicates that the load has a circuit breaker fault. After confirming the load, the switch power supply can be controlled to disconnect the power supply to the load, and then the switch power supply can be controlled to restore the power supply to the next load, and the above steps are repeated until each load is confirmed.

[0062] For example, if a switching power supply supplies power to a load module, and the load module includes three loads, namely a first load, a second load and a third load, then when the fluctuation of the real-time output voltage waveform of the switching power supply and the preset output voltage waveform is outside the preset range, the switching power supply is controlled to disconnect the power supply to the load module, and the fault type of the load module is confirmed at the same time. If the fault type of the load module is a circuit breaker fault, the load self-test mode is entered. In the load self-test mode, the switching power supply is controlled to resume power supply to the first load, and the output voltage waveform after the switching power supply resumes power supply to the first load is obtained. If the output voltage waveform changes, it indicates that the first load is normal. If the output voltage waveform does not change, it indicates that a circuit breaker fault occurs in the first load. After the first load is confirmed, the switching power supply is controlled to disconnect the power supply to the first load, and the switching power supply is controlled to resume power supply to the second load. The above steps are repeated until it is confirmed whether the second load and the third load have faults, and then the corresponding fault information is output to the display module.

[0063] See also Figure 8The present invention also provides a real-time monitoring circuit 100 based on a voltage waveform, and the real-time monitoring circuit 100 based on a voltage waveform includes a data acquisition module 10, a switch module 20 and a control module 30; the data acquisition module 10 is connected to the output end of the switching power supply 200, and is used to collect the output voltage of the switching power supply 200 and generate real-time point cloud data according to the output voltage, and is used to confirm whether the load module 300 has a fault according to the real-time point cloud data and the preset point cloud data and output a corresponding comparison result; the switch module 20 is connected to the load module 300, and is used to control the on and off of the load module 300; the control module 30 is respectively connected to the data acquisition module 10 and the switch module 20, and is used to control the on and off of the load module 300 according to the comparison result.

[0064] Specifically, the real-time monitoring circuit 100 based on the voltage waveform may include a data acquisition module 10, a switch module 20 and a control module 30. The data acquisition module 10 is connected to the output end of the switching power supply 200, and is used to collect the output voltage of the switching power supply 200, and obtain the real-time output voltage waveform according to the output voltage, and then generate real-time point cloud data according to the real-time voltage waveform. At the same time, the data acquisition module 10 can also obtain preset point cloud data, and compare the real-time point cloud data with the preset point cloud data to confirm whether the load module 300 fails, and send the comparison result to the control module 30.

[0065] The switch module 20 is connected to the control module 30 and the load module 300 respectively. The switch module 20 may include a plurality of switch circuits, and different switch circuits are connected to different loads to control the on and off of the loads individually. For example, if there are three loads, the corresponding switch module 20 may be provided with three switch circuits, and one switch circuit is connected to one load. The switch module 20 is used to control the on and off of the load according to the control signal of the control module 30.

[0066] The control module 30 is used to output a control signal to the switch module 20 according to the comparison result, and the switch module 20 controls the on and off of the load module 300 according to the control signal.

[0067] As a further embodiment, the data acquisition module 10 includes a sampling module 11 and a point cloud comparison module 12; the input end of the data acquisition module 10 is connected to the output end of the switching power supply 200, the output end of the data acquisition module 10 is connected to the input end of the point cloud comparison module 12, and the output end of the point cloud comparison module 12 is connected to the control module 30.

[0068] Among them, the sampling module 11 can collect the output waveform of the output voltage of the switching power supply 200 to obtain a real-time output voltage waveform, and obtain real-time point cloud data based on the real-time output voltage waveform, and then output the real-time point cloud data to the point cloud comparison module 12. The point cloud comparison module 12 can obtain preset point cloud data, and compare the real-time point cloud data with the preset point cloud data, and then output the comparison result to the control module 30, so that the control module 30 can control the conduction and shutdown of the switch module 20.

[0069] For example, Figure 8 As shown, the switch power supply 200 supplies power to the load module 300, and the load module 300 includes three loads, namely, a first load 310, a second load 320, and a third load 330. The sampling module 11 collects the output voltage of the switch power supply 200 to obtain a real-time output voltage waveform, and obtains point cloud data based on the real-time output voltage waveform, and then sends the point cloud data to the point cloud comparison module 12. The point cloud comparison module 12 obtains preset point cloud data, and confirms whether the load module 300 has a fault according to the real-time point cloud data and the preset point cloud data, and then outputs the comparison result to the control module 30. The control module 30 obtains the comparison result, and stores the real-time point cloud data and the preset point cloud data. When the load module 300 has a fault, the control module 30 controls the switch module 20 to disconnect, so as to cut off the switch power supply 200 from supplying power to the load module 300. At the same time, the control module 30 confirms the fault type of the load module 300 according to the real-time point cloud data and the preset point cloud data. When the fault type of the load module 300 is short circuit, the control module 30 outputs the short circuit fault information to the display module 50 through the communication module 40. When the fault type of the load module 300 is open circuit, the load self-test mode is entered. In the load self-test mode, the switch power supply 200 is controlled to resume power supply to the first load 310, and the output voltage waveform after the switch power supply 200 resumes power supply to the first load 310 is obtained. If the output voltage waveform changes, it indicates that the first load 310 is normal. If the output voltage waveform does not change, it indicates that the first load 310 has an open circuit fault. After confirming the first load 310, the switch power supply 200 is controlled to disconnect the power supply to the first load 310, and the switch power supply 200 is controlled to resume power supply to the second load 320. The above steps are repeated until it is confirmed whether the second load 320 and the third load 330 have faults, and the corresponding fault information is output to the display module 50.

[0070] The real-time monitoring method and monitoring circuit based on voltage waveform disclosed in the present invention can obtain real-time output voltage data through the output voltage of the switching power supply, and confirm whether the load has a fault based on the real-time output voltage data and the preset output voltage data, so as to timely discover the faulty load.

[0071] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A real-time monitoring method based on voltage waveform, characterized in that: The method comprises: Get the real-time output voltage waveform of the switching power supply; confirming whether the fluctuation of the real-time output voltage waveform compared with the preset output voltage waveform is within a preset range; If the fluctuation of the real-time output voltage waveform compared with the preset output voltage waveform is outside the preset range, the switching power supply is disconnected from supplying power to the connected load.

2. The method according to claim 1, characterized in that After the step of disconnecting the switching power supply from supplying power to the connected load, the method further comprises: confirming a fault type of the load according to the real-time output voltage waveform and the preset output voltage waveform; If the fault type of the load is a circuit breaker fault, a load self-check mode is entered to confirm the presence of a faulty load.

3. The method according to claim 2, characterized in that After the step of confirming the fault type of the load according to the real-time output voltage waveform and the preset output voltage waveform, the method further includes: If the fault type of the load is a short circuit fault, a warning message is output.

4. The method according to claim 2, characterized in that: The step of confirming the fault type of the load according to the real-time output voltage waveform and the preset output voltage waveform comprises: Acquiring real-time point cloud data based on the real-time output voltage waveform, and acquiring preset point cloud data based on the preset output voltage waveform; The fault type of the load is confirmed according to the real-time point cloud data and the preset point cloud data.

5. The method according to claim 4, characterized in that The step of confirming the fault type of the load according to the real-time point cloud data and the preset point cloud data comprises: Obtaining a real-time extreme point voltage mean value corresponding to a peak area in the real-time point cloud data, and obtaining a preset extreme point voltage mean value corresponding to a peak area in the preset point cloud data; If the difference between the real-time extreme point voltage average and the preset extreme point voltage average is greater than or equal to a first preset threshold, it is confirmed that the fault type of the load is a short circuit.

6. The method according to claim 5, characterized in that After the step of obtaining the voltage mean of the preset extreme point corresponding to the peak area in the preset point cloud data, the method further includes: If the difference between the real-time extreme point voltage average and the preset extreme point voltage average is smaller than the first preset threshold and greater than or equal to the second preset threshold, it is confirmed that the fault type of the load is open circuit.

7. The method according to claim 2, characterized in that The load self-test mode includes: Confirm whether the switch power supply disconnects the power supply to all the loads; If the switching power supply cuts off the power supply to all the loads, controlling the switching power supply to resume the power supply to one of the loads; After the switching power supply resumes supplying power to the load, confirming whether the output waveform of the switching power supply changes; If the output waveform of the switching power supply changes, it is confirmed that the load is normal.

8. The method according to claim 7, characterized in that After the step of confirming whether the output waveform of the switching power supply has changed, the method further includes: If the output waveform of the switching power supply does not change, it is confirmed that the load is short-circuited.

9. A real-time monitoring circuit based on voltage waveform, characterized in that: include: A data acquisition module, the data acquisition module is connected to the output end of the switching power supply, and is used to collect the output voltage of the switching power supply and generate real-time point cloud data according to the output voltage, and is used to confirm whether the load module has a fault according to the real-time point cloud data and preset point cloud data and output a corresponding comparison result; A switch module, the switch module is connected to the load module and is used to control the on and off of the load module; A control module, wherein the control module is connected to the data acquisition module and the switch module respectively, and is used to control the on and off of the load module according to the comparison result.

10. The real-time monitoring circuit based on voltage waveform according to claim 9, characterized in that: The data acquisition module includes a sampling module and a point cloud comparison module; The input end of the data acquisition module is connected to the output end of the switching power supply, the output end of the data acquisition module is connected to the input end of the point cloud comparison module, and the output end of the point cloud comparison module is connected to the control module.

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