Electric treadmill and maintenance monitoring system thereof

Abstract

The utility model discloses an electric treadmill and a maintenance monitoring system thereof, belongs to the field of motors, and aims to solve the problem that when the friction force between a running belt and a running plate is increased, the load of a motor connected with the running belt is increased. Therefore, the real-time load of the motor of the motorized treadmill can be collected through the load detection device, the real-time load is compared with the preset threshold value through the comparison device, and when the real-time load is larger than the preset threshold value, the prompt device is triggered to prompt that the motorized treadmill needs to be maintained. By judging the real-time load of the motor, the condition that the friction force between the running belt and the running plate is too large can be determined, and a prompt is given at the moment, so that the electric treadmill can be maintained at a proper time, the cost is reduced, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the field of electric motors, in particular to an electric treadmill and a maintenance monitoring system thereof. Background Art

[0002] An electric treadmill uses an electric motor to drive the running belt to rotate to achieve the running function. After a long period of use, the sliding friction between the running belt and the running board of the electric treadmill will increase, so the running belt and the running board need to be maintained from time to time (for example, adding film release agent, cleaning dust, etc.). In the related art, whether to maintain the treadmill is determined based on the running time or running mileage of the treadmill, but the maintenance timing determined by this method is not accurate, resulting in maintenance actions being too early or too late, increasing costs and reducing user experience.

[0003] Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve at present. Utility Model Content

[0004] The purpose of the utility model is to provide an electric treadmill and a maintenance monitoring system thereof, which can determine the situation where the friction between the running belt and the running board is too large by judging the real-time load of the motor, and give a prompt at this time, which is conducive to maintaining the electric treadmill at an appropriate time, reducing costs and improving user experience.

[0005] In order to solve the above technical problems, the utility model provides a maintenance monitoring system, comprising:

[0006] A load detection device, connected to the motor of the electric treadmill, for obtaining the real-time load of the electric treadmill;

[0007] A comparison device, connected to the load detection device, for triggering a prompt device when the real-time load is greater than a preset threshold;

[0008] The prompting device is connected to the comparison device, and is used for prompting that the electric treadmill needs maintenance when being triggered by the comparison device.

[0009] On the other hand, the load detection device comprises:

[0010] The current sensor is arranged between the output end of the rectifier circuit and the input end of the inverter circuit of the electric treadmill and is connected to the comparison device to obtain the real-time current value of the motor of the electric treadmill.

[0011] On the other hand, the current sensor is a voltage type current sensor;

[0012] The comparison device comprises:

[0013] A reference voltage source, used for providing a reference voltage;

[0014] An electrical isolation device, connected to the voltage comparison circuit and the prompt device respectively, for achieving electrical isolation between the input end and the output end;

[0015] The voltage comparison circuit is connected to the current sensor and the reference voltage source respectively, and is used to trigger the prompt device through the electrical isolation device when the voltage value of the voltage signal of the real-time current value is greater than the voltage value of the reference voltage.

[0016] On the other hand, the voltage comparison circuit comprises:

[0017] an amplifier circuit, connected to the current sensor, and used to amplify the voltage signal of the real-time current value;

[0018] A comparator circuit is connected to the reference voltage source and the amplifier circuit respectively, and is used to trigger the prompt device through the electrical isolation device when the voltage value of the voltage signal of the real-time current value is greater than the voltage value of the reference voltage.

[0019] On the other hand, the amplifier circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first power pin, a first capacitor, a second capacitor, a unidirectional conductive device and a transistor;

[0020] The first power supply pin is respectively connected to the first end of the first resistor, the first end of the second capacitor and the first end of the third resistor; the second end of the second capacitor, the negative electrode of the unidirectional conductive device and the first end of the first capacitor are commonly grounded; the second end of the first resistor is respectively connected to the positive electrode of the unidirectional conductive device and the base of the transistor; the second end of the third resistor is respectively connected to the collector of the transistor and the first end of the fifth resistor; the second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the first end of the seventh resistor; the second end of the sixth resistor is grounded; the second end of the seventh resistor is connected to an input end of the comparator circuit; the second end of the first capacitor is respectively connected to the emitter of the transistor and the first end of the fourth resistor; the second end of the fourth resistor is connected to the current sensor.

[0021] On the other hand, the comparator circuit includes a third power supply pin, a fourth capacitor, a fifth capacitor, a comparator and an eleventh resistor;

[0022] The first input terminal of the comparator is connected to the reference voltage source, the second input terminal of the comparator is respectively connected to the amplifier circuit and the first end of the fifth capacitor, the second end of the fifth capacitor is grounded, the third power supply pin is respectively connected to the power supply terminal of the comparator, the first end of the fourth capacitor and the first end of the eleventh resistor, the second end of the fourth capacitor is grounded, and the output terminal of the comparator is respectively connected to the second end of the eleventh resistor and the electrical isolation device.

[0023] On the other hand, the reference voltage source includes a second power supply pin, an eighth resistor, a ninth resistor, a tenth resistor and a third capacitor;

[0024] The second power supply pin is connected to the first end of the eighth resistor, the second end of the eighth resistor is respectively connected to the first end of the ninth resistor, the first end of the tenth resistor and the first end of the third capacitor, the second end of the ninth resistor and the second end of the third capacitor are commonly grounded, and the second end of the tenth resistor is connected to an input end of the comparator circuit.

[0025] On the other hand, the prompting device comprises:

[0026] A controller connected to the comparison device, and configured to control the reminder to remind the electric treadmill that maintenance is required when triggered by the comparison device;

[0027] The prompter is connected to the controller.

[0028] On the other hand, the prompter includes one of a digital display meter or a voice announcer.

[0029] In order to solve the above technical problems, the utility model also provides an electric treadmill, including the maintenance monitoring system as described above.

[0030] The utility model provides a maintenance monitoring system. Considering that the increase of friction between the treadmill belt and the treadmill board will cause the load of the motor connected to the treadmill belt to increase, the utility model can collect the real-time load of the motor of the electric treadmill through a load detection device, and compare the real-time load with a preset threshold value through a comparison device. When the real-time load is greater than the preset threshold value, the prompt device is triggered to prompt that the electric treadmill needs maintenance. The utility model can determine the situation of excessive friction between the treadmill belt and the treadmill board by judging the real-time load of the motor, and give a prompt at this time, which is conducive to maintaining the electric treadmill at an appropriate time, reducing costs and improving user experience.

[0031] The utility model also provides an electric treadmill, which has the same beneficial effects as the above maintenance monitoring system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the relevant technologies and drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A structural schematic diagram of a maintenance monitoring system provided by the utility model;

[0034] Figure 2 A wiring diagram of a current sensor provided by the utility model;

[0035] Figure 3 A schematic diagram of the structure of a comparison device provided by the utility model;

[0036] Figure 4 This is a structural schematic diagram of another maintenance monitoring system provided by the utility model. DETAILED DESCRIPTION

[0037] The core of the utility model is to provide an electric treadmill and a maintenance monitoring system thereof. By judging the real-time load of the motor, it can determine the situation where the friction between the running belt and the running board is too large, and give a prompt at this time, which is conducive to maintaining the electric treadmill at an appropriate time, reducing costs and improving user experience.

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a maintenance monitoring system provided by the utility model, the maintenance monitoring system comprises:

[0040] A load detection device 1 is connected to the motor of the electric treadmill and is used to obtain the real-time load of the electric treadmill;

[0041] The comparison device 2 is connected to the load detection device 1 and is used to trigger the prompt device 3 when the real-time load is greater than a preset threshold;

[0042] The prompting device 3 is connected to the comparison device 2, and is used for prompting that the electric treadmill needs maintenance when being triggered by the comparison device 2.

[0043] To better illustrate the embodiments of the present invention, please refer to Figure 1 , Figure 1 The present invention provides a structural diagram of a maintenance monitoring system.

[0044] Specifically, taking into account the technical problems in the above background technology, and considering that under normal circumstances the motor of the electric treadmill will drive the treadmill belt to rotate, the treadmill deck of the electric treadmill is in a fixed state, the treadmill belt rotates around the treadmill deck, and the user can run on the treadmill belt. Under normal circumstances, the friction between the treadmill belt and the treadmill deck is very small, and as the use time increases, the friction between the treadmill belt and the treadmill deck will increase, thereby causing the load of the motor connected to the treadmill belt to increase. Therefore, in theory, the load can be used to detect the situation where the friction between the treadmill belt and the treadmill deck is large (that is, maintenance is required), that is, the precise time when the electric treadmill needs maintenance can be determined, thereby avoiding the cost increase caused by premature maintenance and the impact of late maintenance on user experience.

[0045] Specifically, based on the above logic that "the load can be used to detect whether the friction between the running belt and the running board is large (that is, maintenance is required)", in the embodiment of the utility model, the real-time load of the electric treadmill is first obtained through the load detection device 1 to analyze the real-time load, and then the real-time load is compared with the preset threshold through the comparison device 2 connected to the load detection device 1. When the real-time load is greater than the preset threshold, the prompt device 3 is triggered to detect the situation where the real-time load is too large. When the prompt device 3 is triggered by the comparison device 2, it can prompt that the electric treadmill needs maintenance. Therefore, it can be discovered in time when maintenance is needed and the user can be prompted, thereby improving the accuracy of the maintenance timing.

[0046] The utility model provides a maintenance monitoring system. Considering that the increase of friction between the treadmill belt and the treadmill board will cause the load of the motor connected to the treadmill belt to increase, the utility model can collect the real-time load of the motor of the electric treadmill through a load detection device, and compare the real-time load with a preset threshold value through a comparison device. When the real-time load is greater than the preset threshold value, the prompt device is triggered to prompt that the electric treadmill needs maintenance. The utility model can determine the situation of excessive friction between the treadmill belt and the treadmill board by judging the real-time load of the motor, and give a prompt at this time, which is conducive to maintaining the electric treadmill at an appropriate time, reducing costs and improving user experience.

[0047] Based on the above embodiments:

[0048] As an optional embodiment, the load detection device 1 includes:

[0049] The current sensor is arranged between the output end of the rectifier circuit and the input end of the inverter circuit of the electric treadmill and is connected to the comparison device 2 to obtain the real-time current value of the motor of the electric treadmill.

[0050] Specifically, in order to better illustrate the embodiments of the present invention, please refer to Figure 2 , Figure 2 A wiring diagram of a current sensor provided by the utility model is provided. Considering that the current value can accurately reflect the motor load, and the current collection is relatively simple and efficient, the load detection device 1 in the embodiment of the utility model includes a current sensor. The current sensor can be arranged between the output end of the rectifier circuit and the input end of the inverter circuit of the electric treadmill, and connected to the comparison device 2 to obtain the real-time current value of the motor of the electric treadmill.

[0051] As an optional embodiment, the current sensor is a voltage type current sensor;

[0052] Comparative device 2 includes:

[0053] A reference voltage source, used for providing a reference voltage;

[0054] An electrical isolation device, connected to the voltage comparison circuit and the prompt device 3 respectively, for realizing electrical isolation between the input end and the output end;

[0055] The voltage comparison circuit is connected to the current sensor and the reference voltage source respectively, and is used to trigger the prompt device 3 through the electrical isolation device when the voltage value of the voltage signal of the real-time current value is greater than the voltage value of the reference voltage.

[0056] Specifically, considering that the voltage comparison circuit can compare two voltages and give a size relationship, has a simple structure and low cost, the comparison device 2 in the embodiment of the utility model is designed based on the voltage comparison circuit. Based on this, the current sensor in the embodiment of the utility model can be a voltage-type current sensor, and the voltage-type current sensor serves as one input of the voltage comparison circuit. In order to determine the situation where the current value is too high, the reference voltage source is used as another input of the voltage comparison circuit in the embodiment of the utility model. That is, the voltage comparison circuit in the embodiment of the utility model can compare the voltage value of the voltage signal of the real-time current value collected by the voltage-type current sensor with the voltage value of the reference voltage, and when the voltage value of the voltage signal of the real-time current value is greater than the voltage value of the reference voltage, the prompt device 3 is triggered through the electrical isolation device.

[0057] Among them, considering that the voltage comparison circuit actually needs to process the voltage and needs to send a trigger signal to the prompt device 3, in order to prevent the voltage of the voltage comparison circuit from affecting the prompt device 3, an electrical isolation circuit is provided between the voltage comparison circuit and the prompt device 3 in the embodiment of the utility model, so as to achieve electrical isolation between the voltage comparison circuit and the prompt device 3.

[0058] Specifically, the electrical isolation circuit may be of various types, such as a photoelectric coupler, etc., which is not limited in the embodiments of the present utility model.

[0059] Among them, the voltage type current sensor can be of various types, for example, Figure 2 The resistive current sensor RS, etc., is not limited in the embodiments of the present invention.

[0060] Specifically, it is worth mentioning that the voltage value of the reference voltage in the embodiment of the present utility model can be regarded as the preset threshold value mentioned above.

[0061] As an optional embodiment, the voltage comparison circuit includes:

[0062] an amplifier circuit, connected to the current sensor, for amplifying the voltage signal of the real-time current value;

[0063] The comparator circuit is connected to the reference voltage source and the amplifier circuit respectively, and is used to trigger the prompt device 3 through the electrical isolation device when the voltage value of the voltage signal of the real-time current value is greater than the voltage value of the reference voltage.

[0064] Specifically, considering that the voltage signal of the voltage-type current sensor may be relatively weak and difficult to match the voltage requirement of the comparator circuit, in order to enable the comparator circuit to smoothly process the voltage signal of the voltage-type current sensor, the voltage comparison circuit in the embodiment of the utility model includes an amplifier circuit and a comparator circuit. The amplifier circuit can be connected to the current sensor and amplify the voltage signal of the real-time current value. The comparator circuit can be connected to the reference voltage source and the amplifier circuit respectively, and compare the "voltage signal of the real-time current value" amplified by the amplifier circuit with the voltage value of the reference voltage. When the voltage value of the voltage signal of the real-time current value is greater than the voltage value of the reference voltage, the prompt device 3 is triggered by the electrical isolation device.

[0065] Among them, the voltage comparison circuit in the embodiment of the utility model has the advantages of simple structure and low cost.

[0066] Of course, in addition to this specific structure, the voltage comparison circuit can also be of many other types, and the embodiments of the present utility model are not limited here.

[0067] As an optional embodiment, the amplifier circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first power pin, a first capacitor, a second capacitor, a unidirectional conductive device and a transistor;

[0068] The first power supply pin is respectively connected to the first end of the first resistor, the first end of the second capacitor and the first end of the third resistor; the second end of the second capacitor, the negative electrode of the unidirectional conductive device and the first end of the first capacitor are commonly grounded; the second end of the first resistor is respectively connected to the positive electrode of the unidirectional conductive device and the base of the transistor; the second end of the third resistor is respectively connected to the collector of the transistor and the first end of the fifth resistor; the second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the first end of the seventh resistor; the second end of the sixth resistor is grounded; the second end of the seventh resistor is connected to an input end of the comparator circuit; the second end of the first capacitor is respectively connected to the emitter of the transistor and the first end of the fourth resistor; the second end of the fourth resistor is connected to the current sensor.

[0069] To better illustrate the embodiments of the present invention, please refer to Figure 3 and Figure 4 , Figure 3 A schematic diagram of the structure of a comparison device 2 provided by the utility model; Figure 4 This is a structural schematic diagram of another maintenance monitoring system provided by the utility model.

[0070] For details, see Figure 3 The amplifier circuit in the embodiment of the utility model includes: a first resistor PR1, a second resistor PR2, a third resistor PR3, a fourth resistor PR4, a fifth resistor PR5, a sixth resistor PR6, a seventh resistor PR7, a first power pin 5VP, a first capacitor PC1, a second capacitor PC2, a unidirectional conductive device PD1 and a transistor PQ1. The amplifier circuit performs signal amplification based on a transistor and has the advantages of simple structure and low cost.

[0071] Of course, in addition to this specific form, the amplifier circuit can also be of many other types, and the embodiments of the present utility model are not limited here.

[0072] Among them, except Figure 3 In addition to the diode form in the figure, the unidirectional conducting device can be of various types, which are not limited in the embodiments of the present invention.

[0073] As an optional embodiment, the comparator circuit includes a third power supply pin, a fourth capacitor, a fifth capacitor, a comparator and an eleventh resistor;

[0074] The first input terminal of the comparator is connected to a reference voltage source, the second input terminal of the comparator is respectively connected to the amplifier circuit and the first terminal of the fifth capacitor, the second terminal of the fifth capacitor is grounded, the third power supply pin is respectively connected to the power supply terminal of the comparator, the first terminal of the fourth capacitor and the first terminal of the eleventh resistor, the second terminal of the fourth capacitor is grounded, and the output terminal of the comparator is respectively connected to the second terminal of the eleventh resistor and the electrical isolation device.

[0075] For details, see Figure 3 The comparator circuit in the embodiment of the utility model includes: a third power pin 5VP, a fourth capacitor PC4, a fifth capacitor AC23, a comparator PU2A and an eleventh resistor PR12. The comparator circuit is designed based on a comparator and has the advantages of simple structure and low cost.

[0076] Of course, in addition to this specific form, the comparator circuit can also be of many other types, and the embodiments of the present utility model are not limited here.

[0077] As an optional embodiment, the reference voltage source includes a second power supply pin, an eighth resistor, a ninth resistor, a tenth resistor and a third capacitor;

[0078] The second power supply pin is connected to the first end of the eighth resistor, the second end of the eighth resistor is respectively connected to the first end of the ninth resistor, the first end of the tenth resistor and the first end of the third capacitor, the second end of the ninth resistor and the second end of the third capacitor are commonly grounded, and the second end of the tenth resistor is connected to an input end of the comparator circuit.

[0079] For details, see Figure 3 The reference voltage source in the embodiment of the utility model includes a second power pin 5VP, an eighth resistor PR8, a ninth resistor PR9, a tenth resistor PR10 and a third capacitor PC3. The reference voltage source is implemented based on a voltage divider circuit composed of the eighth resistor and the ninth resistor. The voltage value of the reference voltage can be changed by setting the resistance values ​​of the eighth resistor and the ninth resistor. For motors of different powers, the required voltage value of the reference voltage can be determined by changing the resistance values ​​of the eighth resistor and the ninth resistor.

[0080] Specifically, in Figure 3 When the voltage signal of the real-time current value collected by the resistive current sensor RS becomes larger, the voltage at pin 2 of the comparator PU2A increases. When the voltage value is higher than the reference voltage Vref, the comparator reverses and outputs a low level. Pins 1-2 of the photocoupler PU1 are turned on, and pin 4 outputs a high level, which serves as a trigger signal to trigger the prompt device 3.

[0081] In addition, it is worth mentioning that Figure 3In the embodiment, the electrical isolation device includes a twelfth resistor PR11, a photocoupler PU1 and a sixth capacitor AC24.

[0082] Of course, in addition to this specific form, the reference voltage source may also be of many other types, which is not limited in the embodiments of the present invention.

[0083] As an optional embodiment, the prompting device 3 includes:

[0084] A controller, connected to the comparison device 2, for controlling the reminder to remind the electric treadmill that maintenance is required when triggered by the comparison device 2;

[0085] A prompter is connected with the controller.

[0086] Specifically, the prompting device 3 composed of the controller and the prompter has the advantages of simple structure and high reliability.

[0087] The controller may be of various types, such as a single chip microcomputer, etc., and the embodiments of the present invention do not limit this.

[0088] Of course, in addition to this specific structure, the prompt device 3 can also be of many other types, and the embodiment of the utility model is not limited here.

[0089] As an optional embodiment, the prompter includes one of a digital display meter or a voice announcer.

[0090] Specifically, the digital display has the advantages of intuitive prompting effect, and the voice announcer has the advantages of small size and low cost.

[0091] Of course, in addition to these two forms, the prompter can also be of other types, which is not limited in the embodiments of the present utility model.

[0092] The utility model also provides an electric treadmill, comprising the maintenance monitoring system as in the above-mentioned embodiment.

[0093] For an introduction to the electric treadmill provided in the embodiment of the present utility model, please refer to the aforementioned embodiment of the maintenance monitoring system, and the embodiment of the present utility model will not be described in detail here.

[0094] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. It should also be noted that in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the element.

[0095] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A maintenance monitoring system, characterized in that: include: A load detection device, connected to the motor of the electric treadmill, for obtaining the real-time load of the electric treadmill; A comparison device, connected to the load detection device, for triggering a prompt device when the real-time load is greater than a preset threshold; The prompting device is connected to the comparison device, and is used for prompting that the electric treadmill needs maintenance when being triggered by the comparison device.

2. The maintenance monitoring system according to claim 1, characterized in that: The load detection device comprises: The current sensor is arranged between the output end of the rectifier circuit and the input end of the inverter circuit of the electric treadmill and is connected to the comparison device to obtain the real-time current value of the motor of the electric treadmill.

3. The maintenance monitoring system according to claim 2, characterized in that: The current sensor is a voltage type current sensor; The comparison device comprises: A reference voltage source, used for providing a reference voltage; An electrical isolation device, connected to the voltage comparison circuit and the prompt device respectively, for achieving electrical isolation between the input end and the output end; The voltage comparison circuit is connected to the current sensor and the reference voltage source respectively, and is used to trigger the prompt device through the electrical isolation device when the voltage value of the voltage signal of the real-time current value is greater than the voltage value of the reference voltage.

4. The maintenance monitoring system according to claim 3, characterized in that: The voltage comparison circuit comprises: an amplifier circuit, connected to the current sensor, and used to amplify the voltage signal of the real-time current value; A comparator circuit is connected to the reference voltage source and the amplifier circuit respectively, and is used to trigger the prompt device through the electrical isolation device when the voltage value of the voltage signal of the real-time current value is greater than the voltage value of the reference voltage.

5. The maintenance monitoring system according to claim 4, characterized in that: The amplifying circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first power pin, a first capacitor, a second capacitor, a unidirectional conductive device and a triode; The first power supply pin is respectively connected to the first end of the first resistor, the first end of the second capacitor and the first end of the third resistor; the second end of the second capacitor, the negative electrode of the unidirectional conductive device and the first end of the first capacitor are commonly grounded; the second end of the first resistor is respectively connected to the positive electrode of the unidirectional conductive device and the base of the transistor; the second end of the third resistor is respectively connected to the collector of the transistor and the first end of the fifth resistor; the second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the first end of the seventh resistor; the second end of the sixth resistor is grounded; the second end of the seventh resistor is connected to an input end of the comparator circuit; the second end of the first capacitor is respectively connected to the emitter of the transistor and the first end of the fourth resistor; the second end of the fourth resistor is connected to the current sensor.

6. The maintenance monitoring system according to claim 5, characterized in that: The comparator circuit includes a third power supply pin, a fourth capacitor, a fifth capacitor, a comparator and an eleventh resistor; The first input terminal of the comparator is connected to the reference voltage source, the second input terminal of the comparator is respectively connected to the amplifier circuit and the first end of the fifth capacitor, the second end of the fifth capacitor is grounded, the third power supply pin is respectively connected to the power supply terminal of the comparator, the first end of the fourth capacitor and the first end of the eleventh resistor, the second end of the fourth capacitor is grounded, and the output terminal of the comparator is respectively connected to the second end of the eleventh resistor and the electrical isolation device.

7. The maintenance monitoring system according to claim 4, characterized in that: The reference voltage source includes a second power supply pin, an eighth resistor, a ninth resistor, a tenth resistor and a third capacitor; The second power supply pin is connected to the first end of the eighth resistor, the second end of the eighth resistor is respectively connected to the first end of the ninth resistor, the first end of the tenth resistor and the first end of the third capacitor, the second end of the ninth resistor and the second end of the third capacitor are commonly grounded, and the second end of the tenth resistor is connected to an input end of the comparator circuit.

8. The maintenance monitoring system according to any one of claims 1 to 7, characterized in that: The prompting device comprises: A controller connected to the comparison device, and configured to control the reminder to remind the electric treadmill that maintenance is required when triggered by the comparison device; The prompter is connected to the controller.

9. The maintenance monitoring system according to claim 8, characterized in that: The prompter includes one of a digital display meter or a voice announcer.

10. An electric treadmill, characterized in that: Comprising a maintenance monitoring system as claimed in any one of claims 1 to 9.

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