CN113311026A - Bolt looseness detection system and method - Google Patents
Bolt looseness detection system and method Download PDFInfo
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- CN113311026A CN113311026A CN202110583550.0A CN202110583550A CN113311026A CN 113311026 A CN113311026 A CN 113311026A CN 202110583550 A CN202110583550 A CN 202110583550A CN 113311026 A CN113311026 A CN 113311026A
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- 239000007769 metal material Substances 0.000 description 14
- 239000002184 metal Substances 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 229910052755 nonmetal Inorganic materials 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
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- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
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Abstract
The invention relates to a bolt looseness detection system and a bolt looseness detection method, wherein the bolt looseness detection system comprises a detection gasket and a detection circuit, the detection gasket comprises a gasket body and a resistance value acquisition component, the resistance value acquisition component is used for acquiring resistance value changes caused by bolt looseness, and the detection circuit is used for judging whether a bolt is loosened according to the changes acquired by the resistance value acquisition component. The system has simple structure, low cost, simple modification of the original gasket, simple realization mode and strong reliability, and can realize accurate detection of bolt looseness by detecting the change of the resistance value.
Description
Technical Field
The invention relates to the technical field of bolts, in particular to a bolt looseness detection system and method.
Background
Bolt looseness detection is a big problem faced in the current engineering field, and for example, bolt looseness detection requirements exist in power towers, high-speed rail lines and the like. At present, most of the work needs manual inspection, and the workload is large and the efficiency is low. In recent years, bolt looseness detection is realized through pressure change borne by piezoresistive materials, one scheme is direct detection through pressure change, the other scheme is detection through resistance change caused by pressure change, and the method can realize intelligent detection without manual work, but has defects, such as high cost, sensitivity to environmental temperature change, failure caused by factors such as corrosion and rusting in an open-air environment and the like, so that the bolt looseness detection is difficult to popularize and use in actual life.
Disclosure of Invention
The invention aims to provide a bolt looseness detection system and a bolt looseness detection method, which not only can realize automatic detection, but also can greatly reduce the cost.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in one aspect, the invention provides a bolt looseness detection system, which comprises a detection gasket and a detection circuit, wherein the detection gasket comprises a gasket body and a resistance value acquisition component, the resistance value acquisition component is used for acquiring resistance value changes caused by bolt looseness, and the detection circuit is used for judging whether a bolt is loosened according to the changes acquired by the resistance value acquisition component.
As an implementation mode, the gasket body is the annular elastic gasket with the opening, the resistance value acquisition component comprises a conductive contact and a wiring terminal, one conductive contact is arranged at each of two ends of the opening, one conductive contact is connected with one wiring terminal, when the bolt is not in a loose state, the two conductive contacts are in contact, and two pins of the detection circuit are respectively connected with one wiring terminal.
In the scheme, when the bolt is not loosened, under the pressure of the bolt, the two ends of the opening of the annular elastic gasket are contacted, the conductive contacts are contacted, and a communication circuit can be formed after the detection circuit is connected to measure a resistance value; because annular elastic gasket is made by elastic material, has elasticity, consequently when the bolt is not hard up the back, the pressure of bolt disappears or weakens, and annular elastic gasket's elastic restoring force makes the opening both ends break away from each other, and then two conductive contact phase separation, detection circuitry form the state of opening a circuit, and the resistance value changes, changes through detecting that the resistance value changes and can judge whether the bolt is not hard up. In this scheme, only need to set up an opening with current gasket, and set up conductive contact at the opening both ends can (when annular elastic gasket formed by the metal material preparation, conductive contact also can be directly this metal material, perhaps understands that metal material and conductive contact form with the integrative structure of material), the cost is very low, and implements simply, consequently is favorable to popularizing and applying.
In one embodiment, the annular elastic gasket is made of a metal material. Among the metal materials, spring steel is preferred. According to different application scenes, the gasket is made of different materials, such as metal, for example, the gasket is applied to a railway, and the gasket is made of non-metal, for example, rubber gasket for building.
Preferably, the periphery of the annular elastic gasket is coated with an insulating layer, and the conductive contact is connected with the insulating layer.
Preferably, the conductive contact is bonded to the end of the opening by a metal paste.
When the annular elastic gasket is made of a metal material as a whole, the difference of the change of the resistance may not be particularly obvious in the two states of opening disconnection and contact, and thus the requirement on the sensitivity of the detection circuit is high. Among the above-mentioned two schemes, through the periphery cladding insulating layer at annular elastic gasket for whole annular elastic gasket does not have the electrically conductive effect, conductive contact and insulating layer are connected this moment, or conductive contact passes through the metal adhesive and is connected with opening end, the metal adhesive is isolated conductive contact and annular elastic gasket mutually, make only conductive contact can electrically conduct, this moment, the change difference of resistance is showing under the two kinds of states of opening disconnection and contact, consequently, can reduce the sensitivity requirement to detection circuitry, also can guarantee the accuracy of testing result more reliably.
In another embodiment, the annular elastic gasket is made of a non-metal material, and the conductive contact is embedded in the annular elastic gasket. When the annular elastic gasket is made of the non-metal material, the conductive contact can be directly embedded in the non-metal material, so that the connection stability between the conductive contact and the annular elastic gasket is improved, and the implementation mode is simple.
Preferably, the conductive contact is provided with a terminal.
The pins of the test circuit may be directly connected to the conductive contacts, but this may make the stability of the pins poor, which in turn may affect the accuracy of the test. In the above scheme, by arranging the wiring terminal on the conductive contact, the pin of the detection circuit is connected to the wiring terminal, so that the connection is convenient, the connection reliability can be improved, and the detection failure caused by connection failure is avoided.
Optimally, the sum of the widths of the two conductive contacts is equal to the width of the annular elastic gasket, and the two conductive contacts form an upper butt joint structure and a lower butt joint structure.
If the ends of two conductive contacts are directly butted (i.e. the ends are butted left and right), a slight looseness will cause the two conductive contacts to be separated, and a false looseness alarm will be triggered. However, in general, minor loosening is not a safety hazard, i.e., a range of loosening is acceptable. In the above scheme, through setting up two conductive contact to butt joint structure from top to bottom, when the bolt was in not hard up (not hard up state) in certain extent, can dock completely between two conductive contact for the contact is more reliable and more stable, can avoid small acceptable not hard up and cause two conductive contact disconnection, then causes not hard up warning.
It should be noted that, the loosening range is not limited in the present invention, the bolt has only two states, namely, an unfastened state and a loosened state, and when a change in the resistance value at both ends of the opening of the annular elastic gasket (a certain fault-tolerant error is allowed, that is, the resistance value change amount is greater than a set threshold value) is detected, the bolt is determined to be in the loosened state, otherwise, the bolt is in the unfastened state.
Preferably, the surface of the conductive contact in contact with the bolt is provided with a layer of insulating material. Through set up insulating material layer at the surface of conductive contact for when conductive contact and bolt contact, avoid electrically conductive between conductive contact and the bolt, increase two conductive contacts then and contact and break away from the difference of the resistance value under two states, with this sensitivity that reduces detection circuitry.
In another scheme, the gasket body is an annular elastic gasket with an opening, the resistance value acquisition component comprises a resistance piece and a slip sheet, the resistance piece is arranged at the opening, the slip sheet is in contact with the resistance piece, and when the bolt is in a loosening state and a non-loosening state respectively, the relative position between the slip sheet and the resistance piece is changed so as to realize the change of the resistance value.
In the scheme, the principle of the sliding resistor is utilized, the resistor piece and the sliding sheet form a sliding resistor structure, when the bolt is loosened, the gasket body deforms due to pressure loss, the relative position between the resistor piece and the sliding sheet changes, therefore, the length of the resistor piece connected to the circuit changes, the resistor changes when being detected, and then the bolt loosening detection is realized.
In one embodiment, when the annular elastic gasket deforms due to the loosening of the bolt, the resistor or the sliding sheet can move or deform synchronously along with the annular elastic gasket in the deformation direction. When the annular elastic gasket is deformed due to the looseness of the bolt, the resistance piece or the slip sheet can synchronously move in the deformation direction or respectively follow the annular elastic gasket, only one of the resistance piece or the slip sheet is limited to move in a following mode, and therefore the structure is simplified.
In one embodiment, the resistance piece is an elastic spiral resistance wire, two ends of the spiral resistance wire are respectively connected with two end portions of the opening, when the annular elastic gasket deforms due to loosening of the bolt, the spiral resistance wire deforms synchronously along with the annular elastic gasket, one end of the slip sheet is fixed at one end portion of the opening, and two pins of the detection circuit are respectively connected with the slip sheet and the spiral resistance wire.
In one embodiment, the resistance piece is a spiral resistance wire, one end of the spiral resistance wire is connected with one end of the opening, the other end of the spiral resistance wire is suspended, when the annular elastic gasket deforms due to loosening of the bolt, the spiral resistance wire synchronously moves in the deformation direction along with the annular elastic gasket, one end of the sliding piece is fixed at the other end of the opening, and two pins of the detection circuit are respectively connected with the sliding piece and the spiral resistance wire.
In one embodiment, the resistance piece is a resistance column made of a resistance material, one end of the slip sheet is fixed to one end of the opening, when the annular elastic gasket deforms due to looseness of the bolt, the slip sheet moves synchronously in the deformation direction along with the annular elastic gasket, and two pins of the detection circuit are connected with the slip sheet and the resistance column respectively.
On the other hand, the embodiment of the invention also provides a bolt looseness detection method, which is characterized in that a resistance value acquisition component is used for acquiring the resistance value change caused by bolt looseness, and whether the bolt is loosened or not is judged according to the resistance value change.
In one embodiment, whether the bolt is loose is determined by detecting a change in resistance across the opening of the gasket body.
In another embodiment, whether the bolt is loosened or not is determined by detecting a change in the resistance value of the resistance value collecting member.
Compared with the prior art, the detection system has the advantages of simple structure, low cost, simple operation mode and contribution to popularization and application, and can realize bolt loosening detection only by properly modifying the original gasket.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a detection pad provided in embodiment 1.
Fig. 2a and fig. 2b are schematic partial structural diagrams of an opening of the detection pad provided in embodiment 2, respectively.
Fig. 3 is a schematic structural diagram of the detection pad provided in embodiment 3.
Fig. 4 is a schematic partial structure diagram of an opening of the detection pad provided in embodiment 4.
Fig. 5 is a schematic structural diagram of a detection pad provided in embodiment 5.
Fig. 6 is a schematic view of the contact state of two conductive contacts.
FIGS. 7a and 7b are schematic views of a structure of the opening of the detection pad in two states of non-loosening and loosening in one structure provided in embodiment 6; fig. 7c and 7d are schematic views of a partial structure at an opening of a detection gasket in two states of non-loosening and loosening under another structure provided in embodiment 6.
Fig. 8a and 8b are schematic views of a partial structure at an opening of a detection gasket provided in embodiment 7 in two states of non-loosening and loosening.
The labels in the figure are: 10-annular elastic gasket; 20-a conductive contact; 30-a connecting terminal; 40-a plastic sleeve; 50-spiral resistance wire; 60-sliding sheets; a resistive post 70.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The devices of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the bolt loosening detection gasket provided in the present embodiment includes an annular elastic gasket 10 with an opening, two ends of the opening are respectively provided with a conductive contact 20, and the conductive contact 20 is made of a metal material and has a conductive capability.
The annular elastic pad 10 is made of a metal material, such as spring steel, and the conductive contact 20 is connected to an end of the annular elastic pad 10. As another embodiment, the conductive contact 20 may be integrated with the annular elastic pad 10. When the two conductive contacts 20 are in contact, a left-right butt joint is formed, and the two conductive contacts are in plane contact.
Alternatively, in order to facilitate connection with the detection circuit, a connection terminal 30 may be provided on the conductive contact 20, and after the connection terminal 30 is provided, the pin of the detection circuit is connected with the connection terminal 30.
Example 2
Referring to fig. 2a and 2b, the bolt loosening detection gasket of the present embodiment is different from embodiment 1 in that the outer circumference of the annular elastic gasket 10 is covered with an insulating layer, and the conductive contact 20 is connected to the insulating layer.
The insulating layer may be, for example, a plastic sleeve sleeved on the annular elastic gasket 10, or may be insulating paint coated on the outer surface of the annular elastic gasket 10. By the provision of the insulating layer, it is possible to make the annular resilient pad 10 not have the conductive capability, but only the conductive contact 20 when the conductive contact is in communication with the detection circuit.
In particular, two possible embodiments are listed here, as shown in fig. 2a and fig. 2b, respectively.
In the structure shown in fig. 2a, the plastic sleeve 40 is sleeved outside the annular elastic gasket 10, and the length of the plastic sleeve 40 is greater than that of the annular elastic gasket 10, so that the plastic sleeve can extend out by a length, one end of the conductive contact 20 is inserted into the extended plastic sleeve 40, but the end of the conductive contact 20 is not in contact with the annular elastic gasket 10, that is, a gap exists between the two.
In the configuration shown in fig. 2b, the annular resilient gasket 10 is coated with an insulating varnish on both the outer surface and the end face, and the ends of the conductive contacts 20 are connected to the insulating varnish by an adhesive.
In the bolt looseness detection gasket provided in the embodiment, the annular elastic gasket 10 is protected by the insulating layer and is not conductive, so that compared with the structure described in embodiment 1, the resistance change when the two conductive contacts 20 are in contact with each other and are separated from each other is more remarkable, and the sensitivity of the detection circuit can be reduced.
Example 3
Referring to fig. 3, the bolt looseness detecting gasket provided in the present embodiment is different from that of embodiment 1 in that the conductive contact 20 is adhered to the end of the opening by a metal paste.
In order to enhance the connection stability of the conductive contact 20, an L-shaped or a straight-line-shaped groove may be formed on the annular elastic gasket 10, and the conductive contact 20 adopts an L-shaped structure, which is just matched with the groove on the annular elastic gasket 10, as shown in fig. 3. The arrangement can increase the contact area of the conductive contact 20 and the annular elastic gasket 10, and then enhance the stability of the connection between the conductive contact and the annular elastic gasket.
In this embodiment, the annular elastic gasket 10 is not wrapped by the insulating layer, but the effect of isolating the conductive contact 20 is also achieved by the metal adhesive, so that the bolt looseness detection gasket provided in this embodiment can also reduce the sensitivity requirement of the detection circuit.
Example 4
Referring to fig. 4, the present embodiment provides a bolt loosening detection gasket, which includes an annular elastic gasket 10 with an opening, two ends of the opening are respectively provided with a conductive contact 20, and the conductive contact 20 is made of a metal material and has a conductive capability.
More specifically, in the present embodiment, the annular elastic gasket 10 is made of an elastic non-metal material, such as rubber, two ends of the opening are provided with slots, the conductive contacts 20 are in a columnar structure, and the conductive contacts 20 in the columnar structure are inserted into the slots. In order to secure the connection stability between the conductive contact 20 and the annular elastic pad 10, the depth of the insertion groove may be appropriately set to be deeper. In addition, since it is necessary to keep the thickness of the entire gasket uniform, the size of the insertion slot portion of the conductive contact 20 is smaller than the size of the exposure slot portion, which coincides with the size of the annular elastic gasket 10.
Example 5
Referring to fig. 5, the bolt loosening detection gasket provided in the present embodiment is different from embodiment 1 in that the sum of the widths of two conductive contacts 20 is equal to the width of the annular elastic gasket 10, and the two conductive contacts 20 form an up-down butt structure.
It is easily understood that the structural design of the two conductive contacts 20 in this embodiment 5 is also applicable to the structure described in embodiment 2 or 3 or 4.
In addition, based on a similar concept to the structure shown in fig. 5, the end surfaces of the conductive contacts may be provided as non-flat surfaces, and when two conductive contacts are brought into contact, the contacted end surfaces of the two conductive contacts (i.e., the non-flat surfaces) are fitted to each other, as shown in fig. 6. In the structure shown in fig. 6, the end surface of the conductive contact is a corrugated surface, which is easy to understand, and may be in other structural forms, such as a triangular serrated surface, a rectangular serrated surface, and the like. But a corrugated surface is preferred because when the bolt is loose, the two conductive contacts can be prevented from being stuck and being unable to be separated, and the detection is disabled.
It will be readily appreciated that the design of the terminal 30 of embodiment 1 is equally applicable to the structure described in embodiments 2 or 3 or 4 or 5.
In a further preferred embodiment, in the structure according to embodiment 1 or 2 or 3 or 4 or 5, the surface of the conductive contact that contacts the bolt is provided with a layer of insulating material, thereby preventing the conductive contact from being electrically conductive when in contact with the bolt.
According to the bolt looseness detecting gasket provided by each embodiment, when the bolt is in an unremoved state, the pressure of the bolt enables the two conductive contacts to be in contact with each other, when the bolt is in a loosened state, the pressure of the bolt disappears, and the elastic restoring force of the annular elastic gasket enables the two conductive contacts to be separated from each other. Therefore, whether the two conductive contacts are separated from each other can be judged by detecting the resistance change between the two conductive contacts, and then whether the bolt is loosened is indirectly detected.
Therefore, the bolt looseness detection gasket and the detection circuit can form a detection system, and two pins of the detection circuit are respectively connected with a wiring terminal of one conductive contact. The detection circuit is a resistance detection circuit, which is a mature technology, and therefore, the structure of the detection circuit is not described herein, and any circuit structure in the prior art can be adopted.
If a terminal is provided, the pin of the detection circuit is connected to the terminal, and if a terminal is not provided, the pin of the detection circuit is directly connected (or through a wire) to the conductive contact. After the detection circuit is connected, the resistance values at two ends of the opening are detected in real time or according to a certain frequency, and whether the bolt is loosened can be judged through the change of the resistance values. The gasket structure and the method provided by the invention can be used for simply realizing bolt looseness detection and are suitable for large-area popularization.
Example 6
Referring to fig. 7a and 7b, the detection gasket provided in this embodiment includes a gasket body and a resistance value collecting component, the gasket body is an annular elastic gasket with an opening, the resistance value collecting component includes an elastic spiral resistance wire 50 and a sliding piece 60, the spiral resistance wire 50 is disposed at the opening, two ends of the spiral resistance wire 50 are respectively connected to two ends of the opening, the spiral resistance wire 50 contacts one end of the sliding piece 60, the other end of the sliding piece 60 is fixed to one end of the opening, and two pins of the detection circuit are respectively connected to the sliding piece 60 and the spiral resistance wire 50. Since the sliding piece 60 is a metal sliding piece, the annular elastic gasket is preferably made of a non-metal material in order to avoid the influence of the annular elastic gasket.
In the structure shown in fig. 7a and 7b, two ends of the spiral resistance wire 50 are respectively connected with two ends of the opening, and the spiral resistance wire 50 has elasticity, so that the spiral resistance wire can be deformed synchronously along with the annular elastic gasket when the bolt is loosened, but the spiral resistance wire 50 also can not have elasticity, namely, the spiral resistance wire is made of a resistance material without elasticity. As shown in fig. 7c and 7d, at this time, the spiral resistance wire 50 is connected to only one end of the opening of the annular elastic pad, but the end is deformed and displaced due to the loosening of the bolt, and then the spiral resistance wire 50 is driven to displace in the deformation direction, and the end of the opening of the annular elastic pad connected to the sliding piece 60 is not displaced due to the loosening of the bolt.
In the embodiment, the principle of the sliding resistor is utilized to detect the change of the resistance value, so that the bolt looseness is detected. Specifically, spiral resistance wire 50 and gleitbretter 60 have constituted the sliding resistance structure, and annular elastic gasket takes place deformation because of losing pressure when the bolt is not hard up to the position shown in the picture is the reference, and annular elastic gasket's tip can be at vertical rebound, then can drive spiral resistance wire 50 rebound, and gleitbretter 60 is fixed, consequently spiral resistance wire 50 access circuit's length just changes (diminishes this moment), detects out resistance and changes, then realizes the bolt not hard up detection.
Example 7
Referring to fig. 8a and 8b, the detection pad provided in this embodiment is different from that of embodiment 6 in the structure of the resistive member, in which embodiment 6 is the spiral resistance wire 50, and the resistive member is the resistive post 70 made of resistive material. In this configuration, the resistor post 70 is either a separate component or is attached to one end of the opening of the annular elastomeric washer, and this end is not deformed by the loosening of the bolts. The slip sheet 60 is fixed to one end of the opening, and when the annular elastic gasket is deformed due to the loosening of the bolt, the slip sheet moves synchronously in the deformation direction along with the annular elastic gasket. Two pins of the detection circuit are respectively connected with the sliding sheet and the resistance column.
Since the deformation displacement caused by the loosening of the bolt may be small, that is, the length change of the resistor connected into the circuit is small, in order to improve the sensitivity, it is preferable to use a resistor material with a relatively large resistance value to manufacture the resistor column.
The embodiments of examples 6 and 7 are different from examples 1 to 5 in that examples 1 to 5 have a structure in which whether or not a bolt is loosened is judged by detecting a change in resistance value at both ends of an opening of an annular elastic washer, and examples 6 and 7 judge whether or not a bolt is loosened by detecting a change in resistance value of a resistance value collecting member itself. Although the embodiment is different, the invention conception is the same, and whether the bolt is loosened or not is judged by collecting the resistance value change caused by the bolt loosening by the resistance value collecting component.
In the configuration shown in fig. 1-6, the annular resilient pad 10 is circular in shape, but it will be appreciated that the shape may be elliptical, rectangular, polygonal, etc., as desired for a particular application.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The bolt looseness detection system is characterized by comprising a detection gasket and a detection circuit, wherein the detection gasket comprises a gasket body and a resistance value acquisition component, the resistance value acquisition component is used for acquiring resistance value changes caused by bolt looseness, and the detection circuit is used for judging whether a bolt is loosened according to the changes acquired by the resistance value acquisition component.
2. The bolt looseness detecting system according to claim 1, wherein the gasket body is an annular elastic gasket with an opening, the resistance value collecting part includes conductive contacts and a connection terminal, one conductive contact is provided at each of two ends of the opening, one conductive contact is connected to one connection terminal, and when the bolt is in a non-loosened state, the two conductive contacts are in contact with each other, and two pins of the detecting circuit are connected to one connection terminal respectively.
3. The bolt looseness detecting system according to claim 1, wherein the gasket body is an annular elastic gasket with an opening, the resistance value collecting means includes a resistance member and a sliding piece, the resistance member is disposed at the opening, the sliding piece is in contact with the resistance member, and when the bolt is in a loosened state and an unfastened state, respectively, a relative position between the sliding piece and the resistance member is changed to realize a change in the resistance value.
4. The bolt looseness detection system of claim 3, wherein when the annular elastic gasket is deformed due to bolt looseness, the resistor or the slip sheet can move or deform synchronously in a deformation direction along with the annular elastic gasket.
5. The bolt loosening detection system according to claim 4, wherein the resistance member is an elastic spiral resistance wire, two ends of the spiral resistance wire are respectively connected with two end portions of the opening, when the annular elastic gasket deforms due to bolt loosening, the spiral resistance wire deforms synchronously along with the annular elastic gasket, one end of the sliding sheet is fixed at one end portion of the opening, and two pins of the detection circuit are respectively connected with the sliding sheet and the spiral resistance wire.
6. The bolt looseness detection system according to claim 4, wherein the resistance piece is a spiral resistance wire, one end of the spiral resistance wire is connected with one end portion of the opening, the other end of the spiral resistance wire is suspended, when the annular elastic gasket deforms due to bolt looseness, the spiral resistance wire synchronously moves in the deformation direction along with the annular elastic gasket, one end of the sliding piece is fixed to the other end portion of the opening, and two pins of the detection circuit are respectively connected with the sliding piece and the spiral resistance wire.
7. The bolt looseness detection system according to claim 4, wherein the resistance member is a resistance post made of a resistance material, one end of the slip sheet is fixed to one end portion of the opening, when the annular elastic gasket deforms due to bolt looseness, the slip sheet moves synchronously in a deformation direction along with the annular elastic gasket, and two pins of the detection circuit are connected with the slip sheet and the resistance post respectively.
8. The detection method of the bolt loosening detection system according to claim 1, wherein a resistance value change due to the loosening of the bolt is collected by a resistance value collection means, and whether the bolt is loosened is judged according to the resistance value change.
9. The detection method according to claim 8, wherein whether the bolt is loosened is judged by detecting a change in resistance value at both ends of the opening of the gasket body.
10. The detection method according to claim 8, wherein whether the bolt is loosened or not is judged by detecting a change in the resistance value of the resistance value collecting member.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110583550.0A CN113311026A (en) | 2021-05-27 | 2021-05-27 | Bolt looseness detection system and method |
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| CN202110583550.0A CN113311026A (en) | 2021-05-27 | 2021-05-27 | Bolt looseness detection system and method |
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| CN202110583550.0A Pending CN113311026A (en) | 2021-05-27 | 2021-05-27 | Bolt looseness detection system and method |
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Cited By (1)
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| CN116482437A (en) * | 2023-04-26 | 2023-07-25 | 南通大学 | Breakpoint detection device based on bidirectional detection method and application method thereof |
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Application publication date: 20210827 |