Self-monitoring dumbbell pin

Abstract

The utility model provides a self-monitoring dumbbell pin, and belongs to the technical field of dumbbell pin state monitoring. The self-monitoring dumbbell pin is characterized in that a magnetic body is arranged in a switch of a sensor, the magnetic body corresponds to a metal part in position, the metal part can provide a metal environment for the magnetic body of the switch, and the magnetic body close to the metal part is attracted through the metal part; the switch is in an off state; when the dumbbell pin breaks down and the dumbbell pin is separated from the middle groove, the sensor is separated from the metal part, and the metal part cannot attract the magnetic body in the switch, so that the switch is recovered to a conducting state; the position relation between the metal part and the switch can be obtained from the on-off state of the switch of the sensor, that is, whether the dumbbell pin is separated from the middle groove or not is monitored through the sensor on the dumbbell pin, the condition that the dumbbell pin is separated from the dumbbell pin groove serves as the triggering condition for judging the fault, and the fault triggering condition is more universal; the accuracy and reliability of fault monitoring and judgment results can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of dumbbell pin state monitoring, and in particular relates to a self-monitoring dumbbell pin. Background Art

[0002] The middle troughs of the scraper conveyor in the fully-mechanized mining face of a coal mine are connected by dumbbell pins. During the coal mining process, the hydraulic support pushes the middle trough of the scraper conveyor toward the coal wall. During the pushing process, the dumbbell pin needs to withstand a large tensile force, which can easily cause damage and breakage of the dumbbell pin, resulting in the dumbbell pin falling off or being lost; at the same time, the failure of the dumbbell pin block and the spring pin can also cause the dumbbell pin to fall off or be lost. If the dumbbell pin falling off or being lost is not discovered in time, it will easily cause the middle trough connection to be misaligned or disengaged during the process of the hydraulic support pushing the middle trough to slide, affecting the normal production of the working face. The existing sensors have low reliability in monitoring the status of dumbbell pins, which affects the judgment of dumbbell pin failures. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0004] In view of this, according to an embodiment of the present application, a self-monitoring dumbbell pin is proposed, comprising:

[0005] A dumbbell pin body, the dumbbell pin body is installed in the dumbbell pin slot, and the dumbbell pin slot includes a metal part;

[0006] A sensor, wherein the sensor is arranged on the dumbbell pin body;

[0007] The sensor includes a switch, and the switch includes a magnetic body. The magnetic body is arranged close to the metal part so that the magnetic body can be attracted by the metal part, so that the switch is in an off state.

[0008] In a feasible implementation manner, the dumbbell pin body includes:

[0009] Pin rod;

[0010] Two hammer heads, the hammer heads are arranged at both ends of the pin rod, and the sensors are arranged on the hammer heads;

[0011] Two stoppers are provided, wherein the stopper is located at a side of the hammer head away from the middle of the pin rod, and the stopper is detachably connected to the pin rod.

[0012] In a feasible implementation manner, a mounting groove is provided on the hammer head, and the sensor is embedded in the mounting groove.

[0013] In a feasible implementation manner, there are two sensors in total, and the sensors are symmetrically arranged on the hammer head, and the sensors correspond to the hammer heads one by one.

[0014] In a feasible implementation manner, when the sensor moves in a direction away from the metal portion and the metal portion cannot attract the magnetic body, the switch is in an on state.

[0015] In a feasible implementation manner, the sensor further includes:

[0016] a housing, wherein the switch is disposed in the housing;

[0017] A first tag, which is disposed in the housing and is electrically connected to the reader / writer so that the reader / writer can read the first tag;

[0018] The second tag is arranged in the housing and is electrically connected to the switch. When the switch is in the on state, the second tag is connected to the reader / writer, so that the reader / writer can read the second tag.

[0019] In a feasible implementation manner, the sensor further includes:

[0020] The battery is arranged in the housing, the battery is electrically connected to the second tag, and the battery is electrically connected to the switch; when the switch is in an on state, an electrical circuit is formed between the battery and the second tag, so that the battery can supply power to the second tag.

[0021] In one feasible implementation, the first tag is a passive RFID tag;

[0022] The second tag is an active RFID tag. The second tag includes a transmitter chip. When the second tag is connected to a battery, the transmitter chip sends a signal to the reader.

[0023] In a feasible implementation manner, the switch is a magnetic switch, and the switch further comprises:

[0024] An elastic member, wherein a first end of the elastic member is fixed on the magnetic body;

[0025] A shell, the shell cover is arranged on the outside of the magnetic body, and the shell is connected to the second end of the elastic member;

[0026] The base is arranged on a side of the magnetic body away from the elastic member, and the base is connected to the shell;

[0027] The contact is arranged on the side of the base close to the magnetic body. When the contact contacts the magnetic body, the switch is in the on state.

[0028] In a feasible implementation manner, at least two contacts are symmetrically arranged on the base, and the contacts extend along the circumference of the magnetic body.

[0029] Compared with the prior art, the self-monitoring dumbbell pin of the present application has the following beneficial effects:

[0030] The self-monitoring dumbbell pin provided in the embodiment of the present application includes a dumbbell pin body and a sensor; the dumbbell pin body is installed in a dumbbell pin slot, and the dumbbell pin slot includes a metal part. By arranging a magnetic body in the switch of the sensor and making the position of the magnetic body correspond to the position of the metal part, the metal part can provide a metal environment for the magnetic body of the switch, and the metal part attracts the magnetic body close to the metal part, so that the switch is in an off state; when the dumbbell pin fails, causing the dumbbell pin to detach from the middle slot, the sensor detaches from the metal part, and the metal part cannot attract the magnetic body in the switch, so that the switch is restored to an on state; the positional relationship between the metal part and the switch can be obtained from the on-off state of the sensor switch, that is, whether the dumbbell pin detaches from the middle slot is monitored by the sensor on the dumbbell pin, and the dumbbell pin detaching from the dumbbell pin slot is used as a trigger condition for judging the fault. The fault trigger condition is more universal, and can improve the accuracy and reliability of fault monitoring and judgment results. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0032] Figure 1 A schematic structural diagram of a self-monitoring dumbbell pin according to an embodiment of the present application;

[0033] Figure 2 A schematic structural diagram of a sensor for self-monitoring dumbbell pins according to an embodiment of the present application at a first angle;

[0034] Figure 3 A schematic structural diagram of a sensor for self-monitoring dumbbell pins according to an embodiment of the present application from a second angle;

[0035] Figure 4 A schematic structural diagram of a switch for self-monitoring dumbbell pins according to an embodiment of the present application;

[0036] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0037] 11. Dumbbell pin body; 12. Sensor;

[0038] 111. pin rod; 112. hammer head; 113. stopper;

[0039] 121. switch; 122. housing; 123. first label; 124. second label; 125. battery;

[0040] 1211, magnetic body; 1212, elastic member; 1213, housing; 1214, base; 1215, contact. DETAILED DESCRIPTION

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0045] like Figure 1 As shown, according to an embodiment of the present application, a self-monitoring dumbbell pin is proposed, comprising: a dumbbell pin body 11 and a sensor 12; the dumbbell pin body 11 is installed in a dumbbell pin groove, and the dumbbell pin groove includes a metal part; the sensor 12 is arranged on the dumbbell pin body 11; the sensor 12 includes a switch 121, and the switch 121 includes a magnetic body 1211, and the magnetic body 1211 is arranged close to the metal part, so that the magnetic body 1211 can be attracted by the metal part, so that the switch 121 is in an off state.

[0046] The self-monitoring dumbbell pin provided in the embodiment of the present application includes a dumbbell pin body 11 and a sensor 12; the dumbbell pin body 11 is installed in a dumbbell pin groove, and the dumbbell pin groove includes a metal part. By arranging a magnetic body 1211 in a switch 121 of the sensor 12 and making the magnetic body 1211 correspond to the position of the metal part, the metal part can provide a metal environment for the magnetic body 1211 of the switch 121, and the metal part attracts the magnetic body 1211 close to the metal part, so that the switch 121 is in an off state; when the dumbbell pin fails, causing the dumbbell pin to be off, When leaving the middle groove, the sensor 12 is separated from the metal part, and the metal part cannot attract the magnetic body 1211 in the switch 121, so that the switch 121 is restored to the on state; the positional relationship between the metal part and the switch 121 can be obtained from the on-off state of the switch 121 of the sensor 12, that is, whether the dumbbell pin is separated from the middle groove is monitored by the sensor 12 on the dumbbell pin, and the dumbbell pin falling out of the dumbbell pin groove is used as the trigger condition for judging the fault. The fault trigger condition is more universal, which can improve the accuracy and reliability of fault monitoring and judgment results.

[0047] It is understandable that when the dumbbell pin breaks, falls off, or falls out of the dumbbell pin slot due to other faults, the sensor 12 is separated from the metal environment provided by the metal part, the attraction condition of the magnetic body 1211 disappears, the switch 121 is reset, and the switch 121 is in the on state.

[0048] like Figure 1 As shown, in a feasible embodiment, the dumbbell pin body 11 includes: a pin rod 111, two hammer heads 112 and two blocks 113; the hammer heads 112 are arranged at both ends of the pin rod 111, and the sensor 12 is arranged on the hammer heads 112; the block 113 is located on the side of the hammer head 112 away from the middle of the pin rod 111, and the block 113 is detachably connected to the pin rod 111.

[0049] In this technical solution, the pin rod 111 and the two hammer heads 112 are an integrated structure. The two hammer heads 112 at both ends of the pin rod 111 are respectively embedded in the dumbbell pin grooves of the two docking middle grooves. The hammer heads 112 and the dumbbell pin grooves are clamped to limit the axial position of the dumbbell pin body 11; the stopper 113 is detachably arranged on the pin rod 111. By installing the stopper 113 on the pin rod 111 and making the height of the stopper 113 greater than the height of the hammer heads 112, the dumbbell pin body 11 is limited in a direction perpendicular to the axis of the dumbbell pin body 11 by clamping the stopper 113 and the dumbbell pin groove, so as to prevent the dumbbell pin body 11 from escaping from the dumbbell pin groove due to a large-angle rotation. The sensor 12 is installed on the hammer head 112. On the one hand, after force analysis, the sensor 12 installed on the hammer head 112 has a relatively small effect on the force on the dumbbell pin, making the dumbbell pin less likely to be damaged, ensuring that the original structural strength of the dumbbell pin is not destroyed after the sensor 12 is installed; on the other hand, when the block 113 falls off and the hammer head 112 and the pin rod 111 are not separated from the dumbbell pin groove, the sensor 12 on the hammer head 112 will not be separated from the metal environment provided by the metal part. Only when the hammer head 112 is also separated from the dumbbell pin groove and the sensor 12 is separated from the metal environment will it be monitored by the sensor 12. The dumbbell pin falling out of the dumbbell pin groove is used as the trigger condition for judging the fault. The sensor 12 quickly detects the fault of the dumbbell pin falling out of the dumbbell pin groove caused by the failure of the block 113, so as to improve the monitoring sensitivity of the dumbbell pin falling off caused by the failure of the block 113.

[0050] It is understandable that after the stop block 113 falls off, the limit of the stop block 113 is lost, and the hammer head 112 and the pin rod 111 of the dumbbell pin are easy to fall out of the dumbbell pin groove. The sensor 12 is set on the hammer head 112, and the hammer head 112 of the dumbbell pin falls out of the dumbbell pin groove as the trigger condition for judging the fault, that is, the two middle grooves completely lose the limit of the dumbbell pin. The fault trigger condition is more universal, which can improve the accuracy and reliability of fault monitoring and judgment results.

[0051] like Figure 1 As shown, in a feasible implementation manner, a mounting groove is provided on the hammer head 112, and the sensor 12 is embedded in the mounting groove.

[0052] In this technical solution, a mounting groove is provided on the hammer head 112, and the sensor 12 is embedded in the mounting groove, that is, the sensor 12 is embedded in the hammer head 112, so as to avoid damage to the sensor 12 during the contact and extrusion between the hammer head 112 and the middle groove. The service life of the sensor 12 is longer, the structural reliability of the sensor 12 is ensured, and continuous monitoring of the state of the dumbbell pin is realized.

[0053] like Figure 1As shown, in a feasible implementation manner, there are two sensors 12 , and the sensors 12 are symmetrically arranged on the hammer head 112 , and the sensors 12 correspond to the hammer head 112 one by one.

[0054] In this technical solution, two sensors 12 are symmetrically arranged on the dumbbell pin body 11. By comparing the states of the two sensors 12, it is easier to determine the position change of the sensor 12, which is beneficial to improving the accuracy of dumbbell pin state monitoring.

[0055] In a feasible implementation manner, when the sensor 12 moves in a direction away from the metal portion and the metal portion cannot attract the magnetic body 1211 , the switch 121 is in an on state.

[0056] In this technical solution, when the sensor 12 moves away from the metal part, the magnetic body 1211 will gradually separate from the metal environment provided by the metal part. When the metal part can no longer absorb the magnetic body 1211, the switch 121 is reset and is in the on state.

[0057] like Figure 2 and Figure 3 As shown, in a feasible implementation, the sensor 12 also includes: a housing 122, a first tag 123 and a second tag 124; the switch 121 is arranged in the housing 122; the first tag 123 is arranged in the housing 122, and the first tag 123 is wirelessly connected to the reader / writer, so that the reader / writer can read the first tag 123; the second tag 124 is arranged in the housing 122, and the second tag 124 is electrically connected to the switch 121, when the switch 121 is in the on state, the second tag 124 is connected to the switch 121, the second tag 124 is wirelessly connected to the reader / writer, and the reader / writer can read the second tag 124.

[0058] In this technical solution, the first tag 123, the switch 121 and the second tag 124 are all arranged inside the shell 122, and the reader is located outside the shell 122. The switch 121 is used to control the conduction state of the second tag 124. When the switch 121 is turned on, the second tag 124 is turned on, and the reader can read the signal of the second tag 124 through the wireless connection between the second tag 124 and the reader; when the switch 121 is in the disconnected state, the reader only reads the signal of the first tag 123 and cannot read the signal of the second tag 124; when the dumbbell pin fails and falls out of the dumbbell pin groove, the switch 121 is in the on state, the second tag 124 is connected to the reader, and the reader can read the signal of the second tag 124. The signals of the first tag 123 and the second tag 124 read by the reader, that is, two signals are obtained by the reader, and the state of the dumbbell pin is monitored accordingly, indicating that the dumbbell pin may fail, thereby improving the reliability and accuracy of fault judgment.

[0059] Furthermore, when the switch 121 is in the on state, the second tag 124 is turned on, and the second tag 124 is wirelessly connected to the reader / writer, the external reader / writer can read the signals of the first tag 123 and the second tag 124 at the same time, indicating that the dumbbell pin may be faulty; then, the dumbbell pin at the corresponding position is searched according to the signal content of the first tag 123 and the second tag 124, thereby ensuring the accuracy of the dumbbell pin fault detection.

[0060] Furthermore, the housing 122 is a hollow cavity with an opening. After all components inside the housing 122 are installed in place, electronic potting glue is poured to seal the components to fix their positions, thereby ensuring the stability and reliability of the internal structure of the sensor 12.

[0061] like Figure 2 and Figure 3 As shown, in a feasible embodiment, the sensor 12 also includes: a battery 125; the battery 125 is arranged in the housing 122, the battery 125 is electrically connected to the second tag 124, and the battery 125 is electrically connected to the switch 121; when the switch 121 is in an on state, a power circuit is formed between the battery 125 and the second tag 124, so that the battery 125 can supply power to the second tag 124.

[0062] In this technical solution, the switch 121, the battery 125 and the second tag 124 are connected in sequence to form a circuit; when the switch 121 is in an off state, the circuit is disconnected, the battery 125 is disconnected from the second tag 124, and the reader only reads the signal of the first tag 123; when the switch 121 is in an on state, the circuit forms a loop, the battery 125 is connected to the second tag 124, the battery 125 supplies power to the second tag 124, and the reader can read the signals of the second tag 124 and the first tag 123 at the same time; the switch 121 acts as the switch 121 to start the second tag 124. , a battery 125 is used to power the second tag 124; when the dumbbell pin is in normal use, the switch 121 and the circuit are in a disconnected state to save the power of the battery 125. The battery 125 and the circuit are only in a conductive state when the dumbbell pin fails, ensuring that power is saved when the dumbbell pin can be used normally, and then ensuring that the battery 125 has enough power to power the second tag 124 under a fault condition, so that the second tag 124 can continue to send signals to the reader, maintain power supply for a longer time, and ensure that the reader can continue to read the information of the second tag 124.

[0063] Specifically, two lines are led out from both sides of the switch 121, one line is connected to the positive pole of the battery 125, and the other line is connected to the positive pole of the power supply of the second tag 124; the line led out from the negative pole of the second tag 124 is connected to the negative pole of the battery 125, so that when the switch 121 is turned on, a power-on circuit is formed, thereby powering the second tag 124 through the battery 125, so that the reader can read the signal of the second tag 124.

[0064] In some examples, the battery 125 is a R2032 type battery 125 , which provides 3V power to the second tag 124 after the switch 121 is turned on.

[0065] In a feasible implementation, the first tag 123 is a passive RFID tag; the second tag 124 is an active RFID tag, and the second tag 124 includes a transmitter chip. When the second tag 124 and the battery 125 are connected, the transmitter chip sends a signal to the reader.

[0066] In this technical solution, the active RFID tag signal is more significant than the passive RFID tag signal. When the dumbbell pin fails, the switch 121 is reset and automatically opened, and the battery 125 supplies power to the second tag 124, so that the reader reads the signal of the second tag 124 based on the signal of the first tag 123. The reader uses the expression of the signal content of the second tag 124 as the main basis for judging the dumbbell pin failure, thereby ensuring the reliability and effectiveness of the judgment result of the dumbbell pin failure.

[0067] Specifically, the first tag 123 is an ultra-high frequency passive RFID tag, the second tag 124 is an active RFID tag with a built-in wireless radio frequency transmitter chip, and the reader is an RFID reader.

[0068] In some examples, the second tag 124 has a built-in SI24R2 type 2.4 GHz wireless radio frequency transmitter chip, which can send signals to the reader when powered on.

[0069] like Figure 4 As shown, in a feasible embodiment, the switch 121 is a magnetic switch, and the switch 121 also includes: an elastic member 1212, a shell 1213, a base 1214 and a contact 1215; the first end of the elastic member 1212 is fixed on the magnetic body 1211; the shell 1213 is covered on the outside of the magnetic body 1211, and the shell 1213 is connected to the second end of the elastic member 1212; the base 1214 is arranged on the side of the magnetic body 1211 away from the elastic member 1212, and the base 1214 is connected to the shell 1213; the contact 1215 is arranged on the side of the base 1214 close to the magnetic body 1211, and when the contact 1215 is in contact with the magnetic body 1211, the switch 121 is in an on state.

[0070] In this technical solution, the shell 1213 is connected to the base 1214, the magnetic body 1211 is arranged in the shell 1213, a contact 1215 is arranged on the side surface of the magnetic body 1211 close to the base 1214, and an elastic member 1212 is connected to the side surface of the magnetic body 1211 away from the base 1214. When the magnetic attraction between the metal part and the magnetic body 1211 is less than the restoring force of the elastic member 1212, the elastic member 1212 applies a thrust to the magnetic body 1211, so that the magnetic body 1211 can be tightly attached to the two contacts 1215 of the positive pole and the negative pole, and the two contacts 1215 are turned on, thereby turning on the switch 121, so that the switch 121 is opened and the switch 121 is in the on state.

[0071] In this technical solution, when the dumbbell pin is installed in the dumbbell pin slot, the magnetic body 1211 is located close to the metal part, and the metal part attracts the magnetic body 1211 close to the metal part and compresses the elastic member 1212, so that the magnetic body 1211 is separated from the contact 1215, and the switch 121 is in the off state. When the dumbbell pin is separated from the dumbbell pin slot, the magnetic body 1211 is away from the metal part, the metal part can no longer absorb the magnetic body 1211, and the elastic member 1212 restores the elastic deformation, pushing the magnetic body 1211 to move in the direction close to the contact 1215, so that the magnetic body 1211 and the contact 1215 are attached, and the switch 121 is in the on state, and the switch 121 is turned on.

[0072] Furthermore, a conical positioning groove is provided on one side surface of the magnetic body 1211 away from the base 1214, the elastic member 1212 is conical and matches the positioning groove, and the small head end of the elastic member 1212 is embedded in the positioning groove to ensure the stability of the contact between the magnetic body 1211 and the elastic member 1212.

[0073] Furthermore, a guide rod is provided inside the shell 1213 along the axial direction of the shell 1213. When the elastic member 1212 and the magnetic body 1211 are installed in place, the guide rod can pass through the elastic member 1212 and the magnetic body 1211 to guide the movement of the magnetic body 1211 and ensure the smooth movement of the magnetic body 1211.

[0074] Specifically, the elastic member 1212 is a spring.

[0075] like Figure 4 As shown, in a feasible implementation manner, at least two contacts 1215 are symmetrically arranged on the base 1214 , and the contacts 1215 extend along the circumference of the magnetic body 1211 .

[0076] In this technical solution, the magnetic body 1211 is a conductor. After the switch 121 is assembled, the elastic member 1212 can press the magnetic body 1211 tightly against the contact 1215 of the base 1214 without being affected by the outside world, so that the magnetic body 1211 contacts the contact 1215. At this time, the magnetic body 1211 acts as a conductor to connect the two contacts 1215 on the base 1214, so that the switch 121 is in a conducting state, that is, the switch 121 is turned on. By extending the contacts 1215 along the circumference of the magnetic body 1211, it is ensured that the contacts 1215 and the magnetic body 1211 can be fully in contact with each other, thereby preventing disconnection and ensuring the stability of the switch 121 after it is turned on.

[0077] Furthermore, a wiring portion is provided on the contact 1215 , and the wiring portion extends in a direction away from the center of the base 1214 to the outside of the magnetic body 1211 and the housing 1213 , so as to facilitate wiring on the switch 121 .

[0078] It is easy for those skilled in the art to understand that the above-mentioned advantageous methods can be freely combined and superimposed without conflict.

[0079] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A self-monitoring dumbbell pin, characterized in that: The self-monitoring dumbbell pin comprises: A dumbbell pin body, the dumbbell pin body being installed in a dumbbell pin slot, the dumbbell pin slot comprising a metal portion; A sensor, wherein the sensor is arranged on the dumbbell pin body; The sensor includes a switch, and the switch includes a magnetic body. The magnetic body is arranged close to the metal part so that the magnetic body can be attracted by the metal part, so that the switch is in an off state.

2. A self-monitoring dumbbell pin according to claim 1, characterized in that: The dumbbell pin body comprises: Pin rod; Two hammer heads, the hammer heads are arranged at two ends of the pin rod, and the sensor is arranged on the hammer heads; Two stoppers are provided, wherein the stoppers are located on a side of the hammer head away from the middle of the pin rod, and the stoppers are detachably connected to the pin rod.

3. A self-monitoring dumbbell pin according to claim 2, characterized in that: The hammer head is provided with a mounting groove, and the sensor is embedded in the mounting groove.

4. A self-monitoring dumbbell pin according to claim 2, characterized in that: There are two sensors in total, and the sensors are symmetrically arranged on the hammer head, and the sensors correspond to the hammer heads one by one.

5. A self-monitoring dumbbell pin according to claim 1, characterized in that: When the sensor is displaced in a direction away from the metal portion and the metal portion cannot attract the magnetic body, the switch is in an on state.

6. A self-monitoring dumbbell pin according to claim 1, characterized in that: The sensor also includes: a housing, wherein the switch is disposed within the housing; A first tag, wherein the first tag is disposed in the housing and is electrically connected to a reader / writer so that the reader / writer can read the first tag; The second tag is arranged in the housing, the second tag is electrically connected to the switch, and when the switch is in an on state, the second tag is connected to the reader / writer, so that the reader / writer can read the second tag.

7. A self-monitoring dumbbell pin according to claim 6, characterized in that: The sensor also includes: A battery is disposed in the housing, the battery is electrically connected to the second tag, and the battery is electrically connected to the switch; when the switch is in an on state, an electrical circuit is formed between the battery and the second tag, so that the battery can supply power to the second tag.

8. A self-monitoring dumbbell pin according to claim 7, characterized in that: The first tag is a passive RFID tag; The second tag is an active RFID tag. The second tag includes a transmitter chip. When the second tag is connected to the battery, the transmitter chip sends a signal to the reader.

9. A self-monitoring dumbbell pin according to claim 1, characterized in that: The switch is a magnetic switch, and the switch further comprises: An elastic member, a first end of which is fixed on the magnetic body; A shell, the shell is covered on the outside of the magnetic body, and the shell is connected to the second end of the elastic member; A base, the base is arranged on a side of the magnetic body away from the elastic member, and the base is connected to the shell; The contact point is arranged on the side of the base close to the magnetic body. When the contact point contacts the magnetic body, the switch is in an on state.

10. A self-monitoring dumbbell pin according to claim 9, characterized in that: At least two contacts are symmetrically arranged on the base, and the contacts extend along the circumference of the magnetic body.

Images