Device and system for detecting loose fasteners

Abstract

The present invention relates to the technical field of railway fastener loosening detection, and provides a device and system for detecting fastener loosening, including a fixed seat and a movable part, wherein the fixed seat is fixedly arranged on a fastened body, the movable part is connected to the nut of the fastener, the movable part can rotate synchronously with the nut, and the movable part can move from a first position to a second position, wherein an electromagnetic shielding space is arranged on the fixed seat, an electronic tag is arranged on the movable part, when the movable part is in the first position, the electronic tag can be detected by a collection device; when the movable part is in the second position, the electronic tag is located in the electromagnetic shielding space. By detecting the state of the electronic tag through the collection device to determine whether the nut of the fastener is rotated, to determine whether the fastener is loose or has a tendency to loosen, an early warning can be given when the nut of the railway fastener is loose and rotated, and the risk of the fastener actually falling off can be effectively avoided; there is no need to change the existing railway fastener system structure and installation process, and its existing safety structure is not affected.

Description

Technical Field

[0001] The invention relates to the technical field of railway fastener loosening detection, and in particular to a device and a system for detecting fastener loosening. Background Art

[0002] Due to the physical characteristics of the railway fastener system and its distributed structure along with the geographical location of railway construction, the traditional railway fastener system monitoring method of existing railways is mainly in the form of manual regular inspection. The inspectors monitor the health status of the fasteners by knocking on the fasteners to listen to the sound, touching the fasteners to feel their stability, and using a feeler gauge to check the distance between the spring bar and the gauge plate. However, the manual operation method has certain limitations. The operation means are highly dependent on the status of the personnel, the inspection time is long, the efficiency is low, and the inspection quality is difficult to control. Secondly, it is greatly affected by climatic conditions and cannot detect dangerous factors in time. Only when the fasteners are seriously loose to the extent that they can be perceived by humans can the danger be discovered by manual means, and the early warning effect cannot be achieved. Summary of the invention

[0003] The present invention provides a device and system for detecting loose fasteners, so as to solve the defects of the prior art that manual labor is used to detect the health status of fasteners, the inspection time is long, the efficiency is low, the inspection quality is difficult to control and is greatly affected by the environment, and dangerous factors cannot be discovered in time and early warning cannot be provided.

[0004] The present invention provides a device for detecting loose fasteners, comprising:

[0005] A fixing seat, fixedly arranged on the fastened body;

[0006] A movable member connected to the nut of the fastener, the movable member being capable of rotating synchronously with the nut, and the movable member being capable of moving from a first position to a second position;

[0007] Wherein, an electromagnetic shielding space is arranged on the fixing seat, and an electronic tag is arranged on the movable part;

[0008] When the movable member is located at the first position, the electronic tag can be detected by the collection device;

[0009] When the movable part is located at the second position, the electronic tag is located in the electromagnetic shielding space.

[0010] According to a device for detecting loose fasteners provided by the present invention, a sliding space is provided on the fixed seat, the sliding space is connected to the electromagnetic shielding space, and the movable part is arranged in the sliding space, and the movable part can move along the sliding space into the electromagnetic shielding space.

[0011] A device for detecting loose fasteners provided by the present invention further includes:

[0012] A follower is coaxially connected to the nut, and the follower is transmission-connected to the movable member, and the follower can drive the movable member to move from the first position to the second position.

[0013] According to a device for detecting loose fasteners provided by the present invention, the follower is an outer gear ring, the movable member is a rack, the rack is meshed with the outer gear ring, and the electronic tag is arranged at a position of the rack close to the electromagnetic shielding space.

[0014] According to a device for detecting loose fasteners provided by the present invention, the follower is an outer gear ring, the movable part is a gear, and an arc-shaped rack is provided on the side wall of the sliding space, and the gear is meshed with both the outer gear ring and the arc-shaped rack.

[0015] According to a device for detecting fastener loosening provided by the present invention, the follower is detachably connected to the nut via a fixing assembly.

[0016] According to a device for detecting loose fasteners provided by the present invention, the fixing assembly comprises:

[0017] A fixing sleeve, which is sleeved outside the nut;

[0018] A clamp, clamped on the nut;

[0019] Wherein, at least one of the fixing sleeve and the clamp is provided with at least one clamping groove, and the other is provided with at least one protrusion matched with the clamping groove, and the protrusion is embedded in the clamping groove.

[0020] According to a device for detecting loose fasteners provided by the present invention, the fixing seat comprises:

[0021] A first fixing plate, fixed relative to the fastened body;

[0022] A second fixing plate, fixedly connected to the first fixing plate;

[0023] The electromagnetic shielding space and the sliding space are located between the first fixing plate and the second fixing plate, and metal plates or metal coatings are provided at positions of the first fixing plate and the second fixing plate respectively opposite to the electromagnetic shielding space.

[0024] According to a device for detecting loose fasteners provided by the present invention, the electronic tag is an RFID tag.

[0025] The present invention also provides a system for detecting loose fasteners, comprising:

[0026] A fastener loosening detection device, which is a device for detecting fastener loosening as described in any one of the above items;

[0027] A collection device is used to detect the electronic tag of the fastener loosening detection device.

[0028] The device and system for detecting the looseness of fasteners provided by the present invention include a fixed seat and a movable part, wherein the fixed seat is fixedly arranged on the fastened body, the movable part is connected to the nut of the fastener, and the movable part can rotate synchronously with the nut of the fastener, and the nut can drive the movable part to move from a first position to a second position. An electromagnetic shielding space is provided on the fixed seat, and an electronic tag is provided on the movable part. When the movable part is located at the first position, the electronic tag can be detected by the acquisition device, which means that the nut of the fastener has not rotated at this time, thereby indicating that the fastener is not loose or has no tendency to loosen; when the movable part is located at the second position, the electronic tag is located in the electromagnetic shielding space, and due to the electromagnetic shielding effect of the electromagnetic shielding space, the electronic tag cannot be detected by the acquisition device, which means that the nut of the fastener has rotated at this time, thereby indicating that the fastener is loose or has a tendency to loosen.

[0029] With such a configuration, the state of the electronic tag is detected by the collection device to determine whether the nut of the fastener is rotated, thereby determining whether the fastener is loose or has a tendency to loosen. An early warning can be given when the nut of the railway fastener loosens and rotates, which can effectively avoid the risk of the fastener actually falling off; and there is no need to change the existing railway fastener system structure and installation process, will not change the safety design of the existing railway fastener system, and will not affect its existing safety structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a three-dimensional diagram of a device for detecting loose fasteners according to a first optional embodiment of the present invention (the second fixing plate is hidden);

[0032] Figure 2 is a stereoscopic diagram of a device for detecting fastener loosening according to a second optional embodiment of the present invention (the bolts and nuts of the fastener and the second fixing plate are hidden);

[0033] Figure 3 It is a top view of a device for detecting loose fasteners according to a first optional embodiment of the present invention (the second fixing plate is hidden);

[0034] Figure 4 It is a top view of a device for detecting fastener loosening according to a first optional embodiment of the present invention (the bolts and nuts of the fastener and the second fixing plate are hidden);

[0035] Figure 5 It is a bottom view of a device for detecting fastener loosening according to a first optional embodiment of the present invention (the bolts and nuts of the fastener and the second fixing plate are hidden);

[0036] Figure 6 It is an exploded view of a device for detecting fastener loosening according to a second optional embodiment of the present invention (the bolts and nuts of the fastener and the second fixing plate are hidden);

[0037] Figure 7 It is one of the side views of the device for detecting the loosening of a fastener provided by the present invention (the second fixing plate is hidden);

[0038] Figure 8 This is the second side view of the device for detecting fastener looseness provided by the present invention (the second fixing plate is hidden);

[0039] Fig. 9 It is a stereoscopic diagram of a follower and a fixed sleeve of a device for detecting fastener looseness provided by the present invention;

[0040] Fig.10 It is a top view of a follower and a fixed sleeve of a device for detecting fastener looseness provided by the present invention;

[0041] Fig.11 is a schematic diagram of a rack of a device for detecting loose fasteners provided by the present invention;

[0042] Fig.12 is a three-dimensional diagram of a first fixing plate of a first optional embodiment provided by the present invention;

[0043] Fig.13 is a three-dimensional diagram of a first fixing plate of a second optional embodiment provided by the present invention;

[0044] Fig.14 is a three-dimensional diagram of a second fixing plate of a first optional embodiment provided by the present invention;

[0045] Fig.15 It is a three-dimensional diagram of the half hoop provided by the present invention.

[0046] Reference numerals:

[0047] 1. Nut; 2. Bolt; 3. First fixing plate;

[0048] 4. Second fixed plate; 5. Fixed sleeve; 6. Rack;

[0049] 7. gear; 8. outer gear ring; 9. first electromagnetic shielding slot;

[0050] 10. Electronic tag; 11. First slide slot; 12. Arc-shaped rack;

[0051] 13. half hoop; 31. first threaded hole; 32. first through hole;

[0052] 33. groove; 41. second threaded hole; 42. second through hole;

[0053] 51, a card slot; 91, a second electromagnetic shielding slot; 111, a second slide slot;

[0054] 131. protrusion; 132. connecting portion; 133. limiting member. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] Combine the following Figures 1 to 15 The present invention describes an apparatus and system for detecting fastener loosening.

[0057] like Figure 1 As shown, a device for detecting loose fasteners provided by the present invention may include a fixed seat and a movable part, wherein the fixed seat is fixedly arranged on the fastened body, the movable part is connected to the nut 1 of the fastener, and the movable part can rotate synchronously with the nut 1 of the fastener, and the movable part can move from a first position to a second position, that is, the nut 1 can drive the movable part to move from the first position to the second position.

[0058] In addition, an electromagnetic shielding space may be provided on the fixed seat, and an electronic tag 10 may be provided on the movable part.

[0059] When the movable part is located at the first position, the electronic tag 10 can be detected by the acquisition device, which means that the nut 1 of the fastener has not rotated at this time, thereby indicating that the fastener is not loose or has no tendency to loosen.

[0060] When the movable part is in the second position, the electronic tag 10 is in the electromagnetic shielding space. Due to the electromagnetic shielding effect of the electromagnetic shielding space, the electronic tag 10 cannot be detected by the acquisition device, which means that the nut of the fastener is rotated, indicating that the fastener is loose or tends to be loose.

[0061] With such arrangement, the electronic tag 10 is detected to determine whether the nut 1 of the fastener is rotated, so as to determine whether the fastener is loose or has a tendency to loosen, so that an early warning can be given when the nut 1 of the railway fastener is loose and rotated, and the risk of the fastener actually falling off can be effectively avoided; and there is no need to change the existing railway fastener system structure and installation process, and the safety design of the existing railway fastener system will not be changed, and its existing safety structure will not be affected.

[0062] In an optional embodiment of the present invention, a sliding space may be provided on the fixed seat, the sliding space is connected to the electromagnetic shielding space, and the movable member may be provided in the sliding space, and the movable member can move along the sliding space into the electromagnetic shielding space. In this way, when the nut 1 rotates, it is convenient for the movable member to move into the electromagnetic shielding space.

[0063] In an optional embodiment of the present invention, the device for detecting the loosening of a fastener may further include a follower, which may be coaxially connected to the nut 1 of the fastener, and the follower may be transmission-connected to the movable member, and the follower may drive the movable member to move from the first position to the second position. In this way, the movable member may be transmission-connected to the nut 1 of the fastener, and when the nut 1 rotates, the movable member may be driven to move.

[0064] In a first optional embodiment, if Figure 1 and Figure 3 As shown, the follower may be an outer gear ring 8, and the movable part may be a rack 6, and the rack 6 may be meshed with the outer gear ring 8, so that the follower can drive the movable part to move.

[0065] Furthermore, the electronic tag 10 can be arranged at a position of the rack 6 close to the electromagnetic shielding space, so that when the nut 1 is slightly loosened, the electronic tag 10 can enter the electromagnetic shielding space, thereby detecting whether the fastener has a tendency to loosen, which is beneficial to improving the accuracy of fastener loosening detection, thereby improving the safety performance of the rail.

[0066] In a second alternative embodiment, if Figure 2 and Figure 6 As shown, the follower may be an outer gear ring 8, the movable member may be a gear 7, and an arc-shaped rack 12 may be provided on the side wall of the sliding space, and the gear 7 is meshed with both the outer gear ring 8 and the arc-shaped rack 12. In this way, the follower can drive the gear 7 to move along the extension direction of the arc-shaped rack 12, so that the gear 7 can move along the sliding space, thereby allowing the gear 7 to enter the electromagnetic shielding space.

[0067] In an optional embodiment of the present invention, the follower can be detachably connected to the nut 1 of the fastener through a fixing assembly. In this way, it is easy to disassemble and assemble the device for detecting the loosening of the fastener, so as not to affect the inspection, replacement or disassembly of the fastener.

[0068] In an optional embodiment, the fixing assembly may include a fixing sleeve 5 and a clamp, the fixing sleeve 5 may be sleeved outside the nut 1 of the fastener, the follower is fixedly connected to the fixing sleeve 5, and the clamp may be tightened on the nut 1 of the fastener.

[0069] Among them, at least one of the fixing sleeve 5 and the clamp may be provided with at least one slot 51, and the other may be provided with at least one protrusion 131, the protrusion 131 is adapted to the slot 51, and the protrusion 131 is embedded in the slot 51. In this way, the fixing sleeve 5 and the clamp can be fixedly connected by the mutual cooperation of the protrusion 131 and the slot 51, thereby realizing the fixed connection between the follower and the nut 1.

[0070] In this embodiment, the fixing sleeve 5 may be provided with two slots 51, and the clamp may be provided with two protrusions 131, the two protrusions 131 are respectively provided corresponding to the two slots 51, and the two protrusions 131 are respectively embedded in the two slots 51. In this way, the stability of the connection between the fixing sleeve 5 and the clamp may be improved, thereby preventing the fixing sleeve 5 and the clamp from rotating relative to each other.

[0071] In an optional embodiment, the clamp may include two half hoops 13, the two half hoops 13 are detachably connected, and each of the two half hoops 13 is provided with a protrusion 131, so that both half hoops 13 can be connected to the fixing sleeve 5. In this way, it is convenient to disassemble and assemble the fastener and the follower.

[0072] In this embodiment, the two half hoops 13 can be detachably connected by connecting screws.

[0073] Here, the protrusion 131 can be connected to the half hoop 13 through the connecting portion 132 to form an integrated structure. When in use, the two half hoops 13 can be sleeved on the bottom of the nut 1, or the two half hoops 13 can be sleeved on the top of the nut 1, and the connecting portion 132 and the protrusion 131 can be extended between the fixing sleeve 5 and the nut, so that the protrusion 131 is embedded in the slot 51.

[0074] Furthermore, a limiting member 133 may be provided at the bottom or top of the half hoop 13 , and the limiting member 133 may be stuck at the bottom or top of the nut 1 , so that the stability of the connection between the half hoop 13 and the nut 1 may be improved.

[0075] In one embodiment, the fixing sleeve 5 and the follower can be an integrated structure, which can improve the stability of the connection between the fixing sleeve 5 and the follower, reduce the connection structure, and improve the stability of the connection between the follower and the nut 1 of the fastener.

[0076] In another embodiment, the fixing sleeve 5 is detachably connected to the follower, so that when one of the fixing sleeve 5 and the follower is damaged, it is easy to replace, thereby reducing costs; and it is easy to disassemble and assemble.

[0077] In an optional embodiment of the present invention, the fixing seat may include a first fixing plate 3 and a second fixing plate 4 , the first fixing plate 3 may be fixed relative to the fastened body, and the second fixing plate 4 may be fixedly connected to the first fixing plate 3 .

[0078] Here, when the nut of the fastener is loosened and rotated, the first fixing plate 3 and the second fixing plate 4 are relatively fixed to the fastened member, and the first fixing plate 3 and the second fixing plate 4 will not rotate synchronously with the rotation of the nut.

[0079] Among them, the electromagnetic shielding space and the sliding space can be located between the first fixed plate 3 and the second fixed plate 4, and the first fixed plate 3 and the second fixed plate 4 are respectively provided with metal plates or metal coatings at positions opposite to the electromagnetic shielding space, so that the electromagnetic shielding space plays an electromagnetic shielding role.

[0080] In this embodiment, the first electromagnetic shielding slot 9 and the first slide slot 11 may be provided on the first fixed plate 3, the second electromagnetic shielding slot 91 and the second slide slot 111 may be provided on the second fixed plate 4, the second fixed plate 4 is covered on the first fixed plate 3, the first electromagnetic shielding slot 9 and the second electromagnetic shielding slot 91 are connected to form an electromagnetic shielding space, and the first slide slot 11 and the second slide slot 111 are connected to form a sliding space. Here, the slot walls of the first electromagnetic shielding slot 9 and the second electromagnetic shielding slot 91 are both provided with a metal coating.

[0081] In an optional embodiment, the first fixing plate 3 and the second fixing plate 4 may be detachably connected via a plurality of connecting members, for example, the connecting members may be connecting bolts.

[0082] In an optional embodiment, the first fixing plate 3 may be provided with a first through hole 32 for the fixing sleeve 5 (nut 1 or bolt 2) to pass through, the second fixing plate 4 may be provided with a second through hole 42 for the fixing sleeve 5 to pass through, and the first fixing plate 3 may be provided with a groove 33 for accommodating a follower, the groove 33 is connected with the first through hole 32 and the slide groove, so that the follower is connected with the fixing sleeve 5 and the movable part respectively. Here, the outer diameter of the follower is larger than the aperture of the through hole, so that the bottom of the groove 33 can play a certain role in limiting and supporting the follower.

[0083] In an optional embodiment, the fixing seat may be connected to the fastened body via a connecting assembly.

[0084] Here, the fastened body may be a gasket of a fastener, the connecting assembly may include a plurality of long bolts, and the gasket may be provided with a plurality of connecting holes, the fixing seat may be provided with a plurality of threaded holes corresponding to the connecting holes, the threaded holes are matched with the threads of the long bolts, and the plurality of long bolts respectively pass through the plurality of threaded holes and then pass through or are embedded in the plurality of connecting holes. In this way, the fixing seat and the gasket may be connected and relatively fixed by the plurality of long bolts.

[0085] Specifically, a plurality of first threaded holes 31 are provided on the first fixing plate 3, a plurality of second threaded holes 41 are provided on the second fixing plate 4, and a plurality of long bolts respectively pass through the plurality of second threaded holes 41 and the first threaded holes 31 and then pass through or are embedded in the plurality of connecting holes.

[0086] It should be noted that the spring bar of the fastener fixes the gasket and the rail relatively.

[0087] In an optional embodiment of the present invention, the electronic tag 10 may be an RFID tag, so that the loosening of the fastener can be detected using RFID technology.

[0088] Here, the RFID tag may store the coding information and location information of the device for detecting the loosening of the fastener.

[0089] Specifically, the electronic tag 10 may be a passive electronic tag, specifically a nano material tag or an ink tattoo tag.

[0090] The system for detecting loose fasteners provided by the present invention is described below. The system for detecting loose fasteners described below and the device for detecting loose fasteners described above can be referred to each other.

[0091] The present invention provides a system for detecting loose fasteners, which may include a loose fastener detection device and a collection device. The loose fastener detection device may be the device for detecting loose fasteners described in any one of the above embodiments, and the collection device is used to detect the electronic tag 10 of the loose fastener detection device.

[0092] It should be noted that the collection device may be a device capable of collecting information of RFID tags.

[0093] Here, the system for detecting loose fasteners may also include an inspection device, and a collection device is arranged on the inspection device. An operator may use the inspection device to quickly inspect along the railway line, so that the collection device automatically collects the status of the loose fastener detection device, that is, the collection device automatically collects the information of the electronic tag 10 of the loose fastener detection device. When the collection device collects the information of the electronic tag 10, it indicates that the fastener here is not loose. When the collection device does not collect the information of the electronic tag 10, it indicates that the fastener here is loose or has a tendency to loosen.

[0094] In an optional embodiment of the present invention, the system for detecting loose fasteners may further include a cloud data platform and an alarm device, and the acquisition device may be connected to the cloud data platform in communication, and the cloud data platform may be connected to the alarm device in communication. The acquisition device may transmit the location information and coding information of the loose fastener detection device and the status information of the loose fastener detection device to the cloud data platform, and the cloud data platform calculates the health status of the corresponding fastener based on the received information, and gives an early warning for loose fasteners or fasteners with a tendency to loosen, and generates a work order from the early warning for operators to view, so as to facilitate operators of the engineering section to go to the site to handle the work, so as to improve the efficiency of the inspection of loose fasteners in railway engineering.

[0095] In an optional embodiment, the system for detecting loose fasteners may further include an auxiliary electronic tag. The auxiliary electronic tag may be set on a rail corresponding to the loose fastener detection device, and the coding information and location information of the loose fastener detection device may be stored in the auxiliary electronic tag. The information of the auxiliary electronic tag may be collected by a collection device and transmitted to a cloud data platform.

[0096] When the collection device can only collect information from the auxiliary electronic tag but cannot collect (or detect) the information from the electronic tag 10 of the fastener loosening detection device, it means that the nut of the fastener here has rotated, that is, the fastener here has a tendency to loosen or has become loose. The cloud data platform can determine that the health status of the fastener is loose or has a tendency to loosen based on the received auxiliary electronic tag and the information from the electronic tag 10 of the fastener loosening detection device that the collection device has not collected, and generate a work order so that the operator can intuitively know the number and position of the loose fastener or the fastener with a tendency to loosen.

[0097] When the collection device collects information of both the auxiliary electronic tag and the electronic tag 10 of the fastener loosening detection device, it indicates that the fastener here is not loose or has no tendency to loosen.

[0098] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting loose fasteners, characterized in that: include: A fixing seat, fixedly arranged on the fastened body; A movable member connected to the nut of the fastener, wherein the movable member is a gear, and the movable member can rotate synchronously with the nut, and the movable member can move from a first position to a second position; A follower, wherein the follower is an outer gear ring, the follower is coaxially connected to the nut, the follower is transmission-connected to the movable member, and the follower can drive the movable member to move from the first position to the second position; The fixed seat is provided with an electromagnetic shielding space and a sliding space, the sliding space is connected with the electromagnetic shielding space, and the movable part is provided in the sliding space, the movable part can move along the sliding space into the electromagnetic shielding space, and an electronic tag is provided on the movable part; an arc-shaped rack is provided on the side wall of the sliding space, and the movable part is meshed with the follower and the arc-shaped rack; when the movable part is located at the first position, the electronic tag can be detected by the collection device; when the movable part is located at the second position, the electronic tag is located in the electromagnetic shielding space; The device for detecting loose fasteners also includes an auxiliary electronic tag, which is set on the corresponding rail. When the collection device can only collect information from the auxiliary electronic tag but cannot collect information from the electronic tag, it means that the fastener here has a tendency to loosen or has loosened.

2. The device for detecting fastener loosening according to claim 1, characterized in that: The follower is detachably connected to the nut via a fixing assembly.

3. The device for detecting fastener loosening according to claim 2, characterized in that: The fixing assembly comprises: A fixing sleeve, which is sleeved outside the nut; A clamp, clamped on the nut; Wherein, at least one of the fixing sleeve and the clamp is provided with at least one clamping groove, and the other is provided with at least one protrusion matched with the clamping groove, and the protrusion is embedded in the clamping groove.

4. The device for detecting fastener loosening according to claim 1, characterized in that: The fixing seat comprises: A first fixing plate, fixed relative to the fastened body; A second fixing plate, fixedly connected to the first fixing plate; The electromagnetic shielding space and the sliding space are located between the first fixing plate and the second fixing plate, and metal plates or metal coatings are provided at positions of the first fixing plate and the second fixing plate respectively opposite to the electromagnetic shielding space.

5. The device for detecting fastener loosening according to claim 1, characterized in that: The electronic tag is an RFID tag.

6. A system for detecting loose fasteners, characterized in that: include: A fastener loosening detection device, which is a device for detecting fastener loosening according to any one of claims 1 to 5; A collection device is used to detect the electronic tag of the fastener loosening detection device.

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