Dumbbell pin fault detection device and method for scraper conveyor

Abstract

The invention discloses a dumbbell pin fault detection device and method for a scraper conveyor, and the method comprises the following steps: obtaining dumbbell pin deformation and dumbbell pin position data in real time; comparing and judging the deformation of the dumbbell pin in each period with a preset deformation threshold; if the deformation of the dumbbell pin is within a normal range, the dumbbell pin is normal, and if not, the dumbbell pin is abnormal; comparing and judging the position quantity of the dumbbell pin in each period with a preset position quantity threshold value; if the position quantity of the dumbbell pin is within the normal range, the dumbbell pin is normal, and if not, the position of the dumbbell pin is abnormal; and obtaining a judgment result, uploading normal information and abnormal information in time, feeding back the normal information and the abnormal information to a human-computer interface for display, and giving an alarm for reminding the abnormal information of the dumbbell pin. According to the invention, the defect that the dumbbell pin of the traditional scraper conveyor is detected by manpower is overcome, the manpower is greatly saved, the labor intensity is reduced, the detection accuracy is ensured, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of scraper conveyors, and in particular to a dumbbell pin fault detection device and method for scraper conveyors. Background Art

[0002] Scraper conveyor is an important part of the mining and transportation system of coal mine workers. The dumbbell pin is a key component of the scraper conveyor equipment. Its main function is to connect the middle slot of the scraper conveyor to adjust the scraper conveyor according to the length of the coal mining face. During the coal mining and pushing process, the dumbbell pin is subjected to huge impact loads, and often suffers from stretching, breaking, loss and other faults. In severe cases, it can cause the dislocation or damage of the middle slot, causing a series of faults such as hydraulic support pushing and dislocation, affecting the normal operation of the entire coal mining system and even causing the coal mining and transportation system to be paralyzed, seriously affecting the coal mining efficiency, and also bringing hidden dangers to the safety of equipment and personnel.

[0003] At present, the fault judgment of dumbbell pins mainly relies on manual inspection. First, manual inspection is carried out one by one to determine whether the dumbbell pins are lost or broken. If lost or broken, the dumbbell pins are reinstalled one by one. Then manual experience is used to determine whether the dumbbell pins are deformed or cracked, and to determine the dumbbell pins with safety hazards. However, the conditions of the coal mining face are harsh, and the dumbbell pins are often buried by coal or other things. It is very difficult to check their integrity, which is time-consuming and laborious, and it is difficult to accurately judge the fault. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned technology, it is necessary to provide a dumbbell pin fault detection method for a scraper conveyor.

[0005] A method for detecting a fault of a dumbbell pin for a scraper conveyor comprises the following steps:

[0006] Step S1: acquiring the dumbbell pin deformation amount and dumbbell pin position amount data in real time;

[0007] Step S2: Compare the dumbbell pin deformation in each cycle with a preset deformation threshold value to determine whether the dumbbell pin deformation is within a normal range; if the dumbbell pin deformation is within the normal range, it indicates that the dumbbell pin is normal; if not, it indicates that the dumbbell pin is abnormal;

[0008] Step S3: Compare the dumbbell pin position in each cycle with a preset position threshold value to determine whether the dumbbell pin position is within a normal range; if the dumbbell pin position is within the normal range, it indicates that the dumbbell pin is normal; if not, it indicates that the dumbbell pin position is abnormal;

[0009] Step S4: Obtain the judgment results obtained in step S2 and step S3, upload normal information and abnormal information in a timely manner, and feed back to the human-machine interface for display. For abnormal information of the dumbbell pin, an alarm warning reminder is issued.

[0010] Preferably, in step S2, whether the dumbbell pin deformation is within a normal range is determined in the following manner:

[0011] S21: Determine the limit deformation ΔS of the dumbbell pin according to the specifications of the dumbbell pin of the scraper conveyor;

[0012] S22: Divide the dumbbell pin deformation into three sections, and determine the ranges ΔS1, ΔS2, and ΔS3 corresponding to the dumbbell pin deformation in each section; wherein the deformation ΔS1 allows long-term operation, the deformation ΔS2 allows a duration of T2, and the deformation ΔS3 allows a duration of T3;

[0013] S23: Obtain the dumbbell pin deformation D in real time;

[0014] S24: Compare and judge the dumbbell pin deformation D obtained in real time with the deformation ranges ΔS1, ΔS2, and ΔS3 in real time, and record the duration T of each segment;

[0015] S25: judging whether the dumbbell pin is normal according to the deformation range and duration T borne by the dumbbell pin.

[0016] Preferably, the dumbbell pin deformation D and the deformation ranges ΔS1, ΔS2, and ΔS3 are determined as follows:

[0017] The dumbbell pin deformation D<ΔS1, the dumbbell pin is normal;

[0018] The dumbbell pin deformation ΔS1≤D<ΔS2, when T≤T2, the dumbbell pin is normal, when T>T2, the dumbbell pin is abnormal;

[0019] The deformation of the dumbbell pin is ΔS2≤D<ΔS3. When T≤T3, the dumbbell pin is normal; when T>T3, the dumbbell pin is abnormal.

[0020] Preferably, the dumbbell pin deformation D is obtained by reading the alloy resistance wire sensor signal built into the dumbbell pin in real time and measuring the bridge using a resistance strain gauge.

[0021] Preferably, in step S3, it is determined whether the dumbbell pin position is within a normal range by the following method:

[0022] S31: Determine the reference value L of the dumbbell pin according to the specifications of the dumbbell pin of the scraper conveyor, and preset the time Q;

[0023] S32: Obtaining the dumbbell pin position reference value ΔL in real time;

[0024] S33: Compare the dumbbell pin position reference value ΔL obtained in real time with the dumbbell pin reference value L to determine whether the dumbbell pin position is normal.

[0025] Preferably, the dumbbell pin position reference value ΔL and the dumbbell pin reference value Ld are determined as follows:

[0026] The judgment reference value ΔL<L, the dumbbell pin position is normal;

[0027] If the reference value ΔL>L is judged, the timing T1 is started;

[0028] After judging that T1>T, a second judgment is performed. If the reference value ΔL<L, the dumbbell pin position is normal. If the reference value ΔL≥L, the dumbbell pin position is abnormal.

[0029] It is also necessary to provide a dumbbell pin fault detection device for a scraper conveyor.

[0030] A dumbbell pin fault detection device for a scraper conveyor, used to implement the above-mentioned dumbbell pin fault detection method for a scraper conveyor, comprising a controller, and a wireless stress sensor and a wireless position sensor built into the dumbbell pin;

[0031] The controller includes a wireless gateway, an information collection module, a wireless communication module, a calculation control module, an information output module, and an alarm display module;

[0032] The wireless gateway is installed in the controllers arranged at the head, middle and tail of the scraper conveyor, and is used to provide a dedicated wireless LAN to the outside world;

[0033] The information acquisition module is used to receive real-time information from the built-in sensor of the dumbbell pin of the scraper conveyor;

[0034] The calculation control module is used to calculate the deformation degree of the dumbbell pin of the scraper conveyor, and compare it with the limit deformation range of the dumbbell pin to determine whether the deformation of the dumbbell pin is within the normal range. The calculation control module is also used to calculate the relative position of the dumbbell pin of the scraper conveyor to determine whether the position of the dumbbell pin is abnormal;

[0035] The information output module is used to transmit normal or abnormal information of the calculation control module to the alarm display module;

[0036] The alarm display module is used to display normal or abnormal information of the dumbbell pin, and can alarm when abnormal information appears on the dumbbell pin.

[0037] Preferably, the wireless stress sensor comprises an alloy resistance wire sensor, a signal acquisition and calculation circuit, and a wireless communication circuit;

[0038] The alloy resistance wire sensor is built into the dumbbell pin and is used to monitor the deformation of the dumbbell pin;

[0039] The signal acquisition and calculation circuit is built into the dumbbell pin, and the signal acquisition and calculation circuit is electrically connected to the alloy resistance wire sensor, and is used to process the data acquired by the alloy resistance wire sensor;

[0040] The wireless communication circuit is built into the dumbbell pin, and the wireless communication circuit and the wireless gateway establish a wireless local area network for data signal transmission. The wireless communication circuit is electrically connected to the signal acquisition and calculation circuit to send the processed data to the information acquisition module.

[0041] Preferably, the wireless position sensor includes a reference positioning part, a signal determination part, and a wireless communication circuit;

[0042] The reference positioning part is installed in a middle groove fixed relatively to the dumbbell pin;

[0043] The signal judging part is built into the dumbbell pin, and the signal judging part and the reference part are matched one by one, and are used to judge whether the dumbbell pin is within the normal installation position range;

[0044] The wireless communication circuit is built into the dumbbell pin, and the wireless communication circuit establishes a wireless local area network with the wireless gateway for data signal transmission. The wireless communication circuit is electrically connected to the signal judgment part, and is used to send the data processed by the signal judgment part to the information acquisition module.

[0045] Compared with the prior art, the present invention provides a dumbbell pin fault detection device and method for a scraper conveyor. A wireless stress sensor is installed inside the dumbbell pin to monitor the deformation of the dumbbell pin in real time, and the deformation is released to the outside through wireless communication. The receivers installed at the head, middle and tail of the machine receive the deformation information and calculate and analyze the maximum deformation allowed by the dumbbell pin to determine whether the dumbbell pin is normal. A wireless position sensor is installed inside the dumbbell pin, and a positioning signal device is installed at a relatively fixed position between the middle slot and the dumbbell pin. The position sensor inside the dumbbell pin reads the positioning signal in real time and releases the position signal to the outside through wireless. The receivers installed at the head, middle and tail of the machine receive the dumbbell pin position signal and compare it with the reference position signal to determine whether the dumbbell pin is installed in a normal position. The present invention can solve the problem that the inspection of dumbbell pins of traditional scraper conveyors is entirely manual by detecting the fault of the dumbbell pin, which greatly saves manpower, reduces labor intensity, ensures detection accuracy and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only 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 creative work.

[0047] Figure 1 It is a schematic diagram of the control flow of the dumbbell pin fault detection method for a scraper conveyor of the present invention.

[0048] Figure 2 This is a schematic diagram of the structure in which the wireless stress sensor of the present invention is installed on a dumbbell pin.

[0049] Figure 3 The figure is a schematic diagram of the installation position of the wireless position sensor of the present invention.

[0050] Figure 4 It is a schematic diagram of a dumbbell pin fault detection device for a scraper conveyor according to the present invention.

[0051] In the figure: controller 01, wireless gateway 11, information acquisition module 12, calculation control module 13, information output module 14, alarm display module 15, wireless stress sensor 02, alloy resistance wire sensor 21, signal acquisition calculation circuit 22, wireless communication circuit 23, wireless position sensor 03, reference positioning part 31, signal judgment part 32, wireless communication circuit 33, dumbbell pin 04, middle groove 05. DETAILED DESCRIPTION

[0052] 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 only 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.

[0053] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0054] Please see Figure 1 In one embodiment, the present invention provides a method for detecting a fault of a dumbbell pin for a scraper conveyor, comprising the following steps:

[0055] Step S1: acquiring the dumbbell pin deformation amount and dumbbell pin position amount data in real time;

[0056] Step S2: Compare the dumbbell pin deformation in each cycle with a preset deformation threshold to determine whether the dumbbell pin deformation is within a normal range; if the dumbbell pin deformation is within the normal range, it indicates that the dumbbell pin is normal; if not, it indicates that the dumbbell pin is abnormal;

[0057] Step S3: Compare the dumbbell pin position in each cycle with a preset position threshold value to determine whether the dumbbell pin position is within a normal range; if the dumbbell pin position is within the normal range, it indicates that the dumbbell pin is normal; if not, it indicates that the dumbbell pin position is abnormal;

[0058] Step S4: Obtain the judgment results obtained in step S2 and step S3, upload normal information and abnormal information in a timely manner, and feed back to the human-machine interface for display. For abnormal information of the dumbbell pin, an alarm warning reminder is issued.

[0059] To be more specific, in step S2, it is determined whether the dumbbell pin deformation is within a normal range in the following manner:

[0060] S21: Determine the limit deformation ΔS of the dumbbell pin according to the specifications of the dumbbell pin of the scraper conveyor;

[0061] S22: Divide the dumbbell pin deformation into three sections, and determine the ranges ΔS1, ΔS2, and ΔS3 corresponding to the dumbbell pin deformation in each section; wherein the deformation ΔS1 allows long-term operation, the deformation ΔS2 allows a duration of T2, and the deformation ΔS3 allows a duration of T3;

[0062] S23: Obtain the dumbbell pin deformation D in real time;

[0063] S24: Compare and judge the dumbbell pin deformation D obtained in real time with the deformation ranges ΔS1, ΔS2, and ΔS3 in real time, and record the duration T of each segment;

[0064] S25: judging whether the dumbbell pin is normal according to the deformation range and duration T borne by the dumbbell pin.

[0065] Of course, the following method can be used to determine the dumbbell pin deformation D and the deformation range ΔS1, ΔS2, and ΔS3:

[0066] The dumbbell pin deformation D<ΔS1, the dumbbell pin is normal;

[0067] The dumbbell pin deformation ΔS1≤D<ΔS2, when T≤T2, the dumbbell pin is normal, when T>T2, the dumbbell pin is abnormal;

[0068] The deformation of the dumbbell pin is ΔS2≤D<ΔS3. When T≤T3, the dumbbell pin is normal; when T>T3, the dumbbell pin is abnormal.

[0069] To explain more specifically, the dumbbell pin deformation D is obtained by reading the signal of the alloy resistance wire sensor 21 built into the dumbbell pin in real time and measuring the bridge using a resistance strain gauge.

[0070] To be more specific, in step S3, it is determined whether the dumbbell pin position is within the normal range in the following manner:

[0071] S31: Determine the reference value L of the dumbbell pin according to the specifications of the dumbbell pin of the scraper conveyor, and preset the time Q;

[0072] S32: Obtaining the dumbbell pin position reference value ΔL in real time;

[0073] S33: Compare the dumbbell pin position reference value ΔL obtained in real time with the dumbbell pin reference value L to determine whether the dumbbell pin position is normal.

[0074] Of course, the following method can be used to determine the dumbbell pin position reference value ΔL and the dumbbell pin reference value Ld:

[0075] The judgment reference value ΔL<L, the dumbbell pin position is normal;

[0076] If the reference value ΔL>L is judged, the timing T1 is started;

[0077] After judging that T1>T, a second judgment is performed. If the reference value ΔL<L, the dumbbell pin position is normal. If the reference value ΔL≥L, the dumbbell pin position is abnormal.

[0078] Please see Figures 2 to 4 In one embodiment, the present invention provides a dumbbell pin fault detection device for a scraper conveyor, which is used to implement the dumbbell pin fault detection method for a scraper conveyor, including a controller 01, and a wireless stress sensor 02 and a wireless position sensor 03 built into the dumbbell pin;

[0079] The controller 01 includes a wireless gateway 11, an information collection module 12, a calculation control module 13, an information output module 14, and an alarm display module 15;

[0080] As for the wireless gateway 11, it is installed in the controller 01 set at the head, middle and tail of the scraper conveyor, and is used to provide a dedicated wireless local area network to the outside;

[0081] As for the information collection module 12, it is used to receive the real-time information of the built-in sensor of the dumbbell pin of the scraper conveyor;

[0082] The calculation control module 13 is used to calculate the deformation degree of the dumbbell pin of the scraper conveyor, and compare it with the limit deformation range of the dumbbell pin to determine whether the deformation of the dumbbell pin is within the normal range. In addition, the calculation control module 13 is also used to calculate the relative position of the dumbbell pin of the scraper conveyor to determine whether the position of the dumbbell pin is abnormal;

[0083] As for the information output module 14, it is used to transmit the normal or abnormal information of the calculation control module 13 to the alarm display module 15;

[0084] As for the alarm display module 15, it is used to display the normal or abnormal information of the dumbbell pin, and can alarm when the abnormal information of the dumbbell pin appears.

[0085] In one embodiment, the wireless stress sensor 02 includes an alloy resistance wire sensor 21, a signal acquisition and calculation circuit 22, and a wireless communication circuit 23;

[0086] Among them, the alloy resistance wire sensor 21 is built into the dumbbell pin to monitor the deformation of the dumbbell pin;

[0087] The signal acquisition and calculation circuit 22 is built into the dumbbell pin, and the signal acquisition and calculation circuit 22 is electrically connected to the alloy resistance wire sensor 21, and is used to process the data acquired by the alloy resistance wire sensor 21;

[0088] Among them, the wireless communication circuit 23 is built into the dumbbell pin, the wireless communication circuit 23 establishes a wireless local area network with the wireless gateway for data signal transmission, and the wireless communication circuit 23 is electrically connected to the signal acquisition and calculation circuit 22 for sending the processed data to the information acquisition module 12.

[0089] In one embodiment, the wireless position sensor 03 includes a reference positioning part 31, a signal determination part 32, and a wireless communication circuit 33;

[0090] Wherein, the reference positioning part 31 is installed in the middle groove fixed relatively to the dumbbell pin;

[0091] The signal determination part 32 is built into the dumbbell pin, and the signal determination part 32 and the reference part are matched one by one to determine whether the dumbbell pin is within the normal installation position range;

[0092] Among them, the wireless communication circuit 33 is built into the dumbbell pin, the wireless communication circuit 33 establishes a wireless local area network with the wireless gateway for data signal transmission, and the wireless communication circuit 33 is electrically connected to the signal judgment part 32 for sending the data processed by the signal judgment part 32 to the information acquisition module 12.

[0093] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A method for detecting a fault of a dumbbell pin for a scraper conveyor, characterized in that: The following steps are included: Step S1: acquiring the dumbbell pin deformation amount and dumbbell pin position amount data in real time; Step S2: Compare the dumbbell pin deformation in each cycle with a preset deformation threshold to determine whether the dumbbell pin deformation is within a normal range; if the dumbbell pin deformation is within the normal range, it indicates that the dumbbell pin is normal; if not, it indicates that the dumbbell pin is abnormal; Step S3: Compare the dumbbell pin position in each cycle with a preset position threshold value to determine whether the dumbbell pin position is within a normal range; if the dumbbell pin position is within the normal range, it indicates that the dumbbell pin is normal; if not, it indicates that the dumbbell pin position is abnormal; Step S4: Obtain the judgment results obtained in step S2 and step S3, upload normal information and abnormal information in a timely manner, and feed back to the human-machine interface for display. For abnormal information of the dumbbell pin, an alarm warning reminder is issued.

2. The method for detecting a fault of a dumbbell pin for a scraper conveyor according to claim 1, characterized in that: In step S2, it is determined whether the dumbbell pin deformation is within the normal range, using the following method: S21: Determine the limit deformation ΔS of the dumbbell pin according to the specifications of the dumbbell pin of the scraper conveyor; S22: Divide the dumbbell pin deformation into three sections, and determine the ranges ΔS1, ΔS2, and ΔS3 corresponding to the dumbbell pin deformation in each section; wherein the deformation ΔS1 allows long-term operation, the deformation ΔS2 allows a duration of T2, and the deformation ΔS3 allows a duration of T3; S23: Obtain the dumbbell pin deformation D in real time; S24: Compare and judge the dumbbell pin deformation D obtained in real time with the deformation ranges ΔS1, ΔS2, and ΔS3 in real time, and record the duration T of each segment; S25: judging whether the dumbbell pin is normal according to the deformation range and duration T borne by the dumbbell pin.

3. The method for detecting a fault of a dumbbell pin for a scraper conveyor according to claim 2, characterized in that: The determination method of dumbbell pin deformation D and deformation range ΔS1, ΔS2, ΔS3 is as follows: The dumbbell pin deformation D<ΔS1, the dumbbell pin is normal; The deformation of the dumbbell pin ΔS1≤D<ΔS2, when T≤T2, the dumbbell pin is normal, when T>T2, the dumbbell pin is abnormal; the deformation of the dumbbell pin ΔS2≤D<ΔS3, when T≤T3, the dumbbell pin is normal, when T>T3, the dumbbell pin is abnormal.

4. The method for detecting a fault of a dumbbell pin for a scraper conveyor according to claim 2, characterized in that: The dumbbell pin deformation D is obtained by reading the alloy resistance wire sensor signal built into the dumbbell pin in real time and measuring the bridge using a resistance strain gauge.

5. The method for detecting a fault of a dumbbell pin for a scraper conveyor according to claim 1, characterized in that: In step S3, it is determined whether the dumbbell pin position is within the normal range in the following manner: S31: Determine the reference value L of the dumbbell pin according to the specifications of the dumbbell pin of the scraper conveyor, and preset the time Q; S32: Obtaining the dumbbell pin position reference value ΔL in real time; S33: Compare the dumbbell pin position reference value ΔL obtained in real time with the dumbbell pin reference value L to determine whether the dumbbell pin position is normal.

6. The method for detecting a fault of a dumbbell pin for a scraper conveyor according to claim 5, characterized in that: The dumbbell pin position reference value ΔL and the dumbbell pin reference value Ld are determined as follows: The judgment reference value ΔL<L, the dumbbell pin position is normal; If the reference value ΔL>L is judged, the timing T1 is started; After judging that T1>T, a second judgment is performed. If the reference value ΔL<L, the dumbbell pin position is normal. If the reference value ΔL≥L, the dumbbell pin position is abnormal.

7. A dumbbell pin fault detection device for a scraper conveyor, used to implement the dumbbell pin fault detection method for a scraper conveyor according to any one of claims 1 to 6, characterized in that: It includes a controller, and a wireless stress sensor and a wireless position sensor built into a dumbbell pin; The controller includes a wireless gateway, an information acquisition module, a calculation control module, an information output module, and an alarm display module; The wireless gateway is installed in the controllers arranged at the head, middle and tail of the scraper conveyor, and is used to provide a dedicated wireless LAN to the outside world; The information acquisition module is used to receive real-time information from the built-in sensor of the dumbbell pin of the scraper conveyor; The calculation control module is used to calculate the deformation degree of the dumbbell pin of the scraper conveyor, and compare it with the limit deformation range of the dumbbell pin to determine whether the deformation of the dumbbell pin is within the normal range. The calculation control module is also used to calculate the relative position of the dumbbell pin of the scraper conveyor to determine whether the position of the dumbbell pin is abnormal; The information output module is used to transmit normal or abnormal information of the calculation control module to the alarm display module; The alarm display module is used to display normal or abnormal information of the dumbbell pin, and can alarm when abnormal information appears on the dumbbell pin.

8. The dumbbell pin fault detection device for a scraper conveyor according to claim 7, characterized in that: The wireless stress sensor includes an alloy resistance wire sensor, a signal acquisition and calculation circuit, and a wireless communication circuit; The alloy resistance wire sensor is built into the dumbbell pin and is used to monitor the deformation of the dumbbell pin; The signal acquisition and calculation circuit is built into the dumbbell pin, and the signal acquisition and calculation circuit is electrically connected to the alloy resistance wire sensor, and is used to process the data acquired by the alloy resistance wire sensor; The wireless communication circuit is built into the dumbbell pin, and the wireless communication circuit and the wireless gateway establish a wireless local area network for data signal transmission. The wireless communication circuit is electrically connected to the signal acquisition and calculation circuit to send the processed data to the information acquisition module.

9. The dumbbell pin fault detection device for a scraper conveyor according to claim 7, characterized in that: The wireless position sensor includes a reference positioning part, a signal judgment part, and a wireless communication circuit; The reference positioning part is installed in a middle groove fixed relatively to the dumbbell pin; The signal judging part is built into the dumbbell pin, and the signal judging part and the reference part are matched one by one, and are used to judge whether the dumbbell pin is within the normal installation position range; The wireless communication circuit is built into the dumbbell pin, and the wireless communication circuit establishes a wireless local area network with the wireless gateway for data signal transmission. The wireless communication circuit is electrically connected to the signal judgment part, and is used to send the data processed by the signal judgment part to the information acquisition module.

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