CN113007202A - Radio frequency gasket, screw fastener and positioning and tightness detection method thereof - Google Patents

Radio frequency gasket, screw fastener and positioning and tightness detection method thereof Download PDF

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Publication number
CN113007202A
CN113007202A CN202110166728.1A CN202110166728A CN113007202A CN 113007202 A CN113007202 A CN 113007202A CN 202110166728 A CN202110166728 A CN 202110166728A CN 113007202 A CN113007202 A CN 113007202A
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CN
China
Prior art keywords
gasket
radio frequency
nut
bolt
detection circuit
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Granted
Application number
CN202110166728.1A
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Chinese (zh)
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CN113007202B (en
Inventor
方钦爽
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Globals Electronics Wenzhou Co ltd
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Globals Electronics Wenzhou Co ltd
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Priority to CN202110166728.1A priority Critical patent/CN113007202B/en
Publication of CN113007202A publication Critical patent/CN113007202A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B43/00Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B31/00Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/028Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load with a load-indicating washer or washer assembly
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

Abstract

The invention relates to a radio frequency gasket, a screw fastener and a positioning and tightness detection method thereof, wherein the radio frequency gasket comprises a gasket part and a passive radio frequency transponder part, a through hole is formed in the gasket part, the passive radio frequency transponder part comprises an RFID chip, a radio frequency antenna circuit and a switch detection circuit, the radio frequency antenna circuit and the switch detection circuit are electrically connected with the RFID chip, the switch detection circuit extends to the gasket part and is disconnected to form two contact terminals, and when the gasket part is pressed, the two contact terminals are connected to enable the switch detection circuit to form a conducting loop; the screw fastener comprises a bolt, a nut and a radio frequency gasket; the detection method comprises the step of reading a position signal of the screw fastener and a switch detection circuit on-off signal by using a reader to judge the fastening or loosening of the screw fastener. The method has the advantages that the position signal and the signal of the on or off of the switch detection circuit are obtained simultaneously, the detection is convenient, and the maintenance efficiency is improved; the passive radio frequency technology is adopted, so that the using time is not limited by electric quantity; the radio frequency gasket can be used repeatedly.

Description

Radio frequency gasket, screw fastener and positioning and tightness detection method thereof
Technical Field
The invention relates to the technical field of Radio Frequency Identification (RFID), in particular to a radio frequency gasket, a screw fastener and a positioning and tightness detection method thereof.
Background
In industrial activities, many screw fasteners used in vibration environments are loosened and even fall off after long-term use, which results in accidents, and therefore frequent maintenance and inspection by maintenance personnel are required. However, such frequent maintenance and inspection has the disadvantages of large labor amount, high labor cost and low efficiency, and the working environment is usually severe (for example, maintenance of high-altitude fasteners at the top of a power iron tower), and accidents such as high-altitude falling, electric shock and mechanical extrusion occasionally occur during the maintenance and inspection. Meanwhile, due to manual maintenance, the condition of missed detection is easy to occur, and the condition that the fastening piece is loosened and even falls off cannot be completely eradicated.
The Radio Frequency Identification (RFID) technology, namely a passive radio frequency tag adopts a frequency hopping working mode, has the anti-interference capability, can self-define and read standard data by a user, has higher efficiency in a special application system, and can realize the reading distance of more than 10 meters. The passive radio frequency transponder (passive tag) is not provided with a built-in battery, is in a passive state when the reading range of the reader is out, and extracts power supply required by the work of the passive radio frequency transponder from radio frequency energy emitted by the reader when the reading range of the reader is in. Passive rf transponders generally use a reflection modulation scheme to complete the transmission of the electronic tag information to the reader.
If the radio frequency transponder (RFID) is used as a gasket, namely a passive radio frequency gasket, and is applied to the screw fastener, the tightness of the screw fastener can be conveniently detected. When the screw is fastened, the detection circuit in the wireless radio frequency gasket is conducted and can transmit a signal representing 'normal' and '1' to the reader; when the screw is loosened, the detection circuit in the wireless radio frequency gasket is broken, and the reader receives a signal representing 'abnormity' and '0'.
Disclosure of Invention
The invention aims to solve the technical problem of providing a radio frequency gasket, a screw fastener and a positioning and tightness detection method thereof, and aims to overcome the defects that the tightness of the screw fastener in the prior art usually needs manual maintenance.
The technical scheme for solving the technical problems is as follows: a radio frequency gasket comprises a gasket part and a passive radio frequency transponder part (RFID) connected with the gasket part, wherein a through hole which is penetrated through vertically for a bolt to pass through is formed in the gasket part, the passive radio frequency transponder part comprises an RFID chip, a radio frequency antenna circuit and a switch detection circuit, the radio frequency antenna circuit and the switch detection circuit are electrically connected with the RFID chip, the switch detection circuit extends to the gasket part and is disconnected to form two contact terminals, and when and only when the gasket part is pressed by a nut or a nut of the bolt, the two contact terminals are connected to enable the switch detection circuit to form a conducting loop.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the gasket part is made of insulating hard materials and is in a ring shape, and the passive radio frequency transponder part is connected to one side of the gasket part and is positioned outside a nut or nut contact area of the gasket part and the bolt.
The advantage of adopting above-mentioned further institutional advancement is that, insulating hard material warp when the pressurized on the one hand for a short time, can avoid inside switch detection circuit to take place great deformation and impaired because of gasket part pressurized, and on the other hand insulating material itself has played the effect that the partial circuit in the encapsulation switch detection circuit extended into gasket part, reaches the purpose that makes two contact terminal separately open circuit.
Further, the two contact terminals are located on the same side surface of the pad portion and spaced apart in the circumferential direction.
Adopt above-mentioned further institutional advancement's benefit to be located gasket partial surface, be convenient for and the terminal surface of the nut or the nut of the bolt that acts on the conductor pastes tightly and makes two contact terminals realize electrically conductive intercommunication, the purpose that switch detection circuit closed when realizing that the gasket is compressed tightly switches on.
Furthermore, a copper ring sheet or a copper plating layer which is respectively contacted with the two contact terminals is fixedly arranged on the end face of the nut or the nut of the bolt, which is contacted with the gasket part.
Adopt above-mentioned further institutional advancement's benefit to be, the nut or the nut of ordinary bolt are made by the stainless steel, and the resistance is great relatively, can reduce the resistance greatly after setting up copper ring piece or copper coating, guarantee the sensitivity of listening of switch detection circuit.
Furthermore, the two contact terminals correspond to each other up and down, at least one contact terminal is fixed on the end face of a telescopic column, when the gasket part is pressed by a bolt or a nut, the contact terminal on the telescopic column is close to and contacts the other contact terminal, and after the bolt or the nut is unscrewed, the telescopic column returns to enable the two contact terminals to be separated.
Adopt above-mentioned further institutional advancement's benefit to be, can all locate gasket part inside with two contact terminals, and need not with nut or bolt direct contact, so contact terminal can not produce wearing and tearing when because of bolt or nut rotating, and the durability is better and sensitivity is high.
Furthermore, a sliding groove for inserting the telescopic column is formed in the gasket part, one end of the telescopic column is located in the sliding groove, the other end of the telescopic column extends out of the sliding groove, a reset spring is arranged in the sliding groove, one end of the reset spring is abutted against the telescopic column, the other end of the reset spring is abutted against the bottom of the sliding groove, one contact terminal is fixed at one end of the telescopic column located in the sliding groove, and the other contact terminal is fixed at the bottom of the sliding groove.
The advantage of adopting above-mentioned further configuration improvement is that simple structure just can guarantee the higher sensitivity of switch detection circuit.
Further, the gasket part and the passive radio frequency transponder part are externally coated with weather-resistant and corrosion-resistant plastic coatings.
The advantage of adopting above-mentioned further structural improvement is, can effectively strengthen the tolerance of radio frequency gasket to open-air environment after coating resistant anticorrosive plastic coating, guarantee its long enough life.
Further, the effective identification distance between the passive radio frequency transponder part and a reader matched with the passive radio frequency transponder part is more than 10 m.
The improved structure has the advantages of long effective identification distance, convenient remote detection of detection bits and improved safety (for example, the device does not need to ascend a height or approach the running equipment).
The invention also provides a screw fastener which comprises a bolt, a nut and the radio frequency gasket, wherein the bolt is fixed on a workpiece or inserted into the mounting hole of the workpiece, the nut is in threaded connection with the bolt, and the radio frequency gasket is clamped between the nut and the workpiece.
The invention also provides a method for detecting the positioning and tightness of the screw fastener, which comprises the following steps: the radio frequency gasket is sleeved on each bolt for detecting the position, then the bolts or nuts on the bolts are screwed one by one to enable the gasket part to be pressed tightly, at the moment, the radio frequency antenna circuit and the switch detection circuit are both conduction loops, if the gasket part is pressed tightly by the bolts or the nuts and is not loosened, a screw position signal transmitted by the radio frequency gasket and a signal representing that the switch detection circuit is conducted and the screw is not loosened can be remotely received through a reader, and at the moment, a maintenance measure is not needed; if the gasket part is not pressed, the switch detection circuit is broken, a screw position signal transmitted by the radio frequency gasket and a signal representing that the switch detection circuit is broken and the screw is loosened can be remotely received through the reader, and at the moment, a maintenance measure is needed to be adopted, and a corresponding nut or bolt is accurately found according to the screw position information to carry out screwing operation.
Compared with the prior art, the invention has the beneficial effects that:
1) the passive radio frequency transponder part of the radio frequency gasket is provided with a radio frequency antenna circuit and a switch detection circuit, and whether the switch detection circuit forms a communication loop is determined by whether the gasket part of the radio frequency gasket is pressed, so that whether the nut or the bolt is in a screwing state or a loosening state can be conveniently and accurately judged according to a return signal of whether the switch detection circuit is conducted or not received by a reader; in addition, the radio frequency antenna circuit is always conducted, so that a reader can accurately read position signals of corresponding nuts or bolts no matter whether the switch detection circuit is conducted or not, on one hand, when one of a plurality of detected nuts or bolts is loosened, accurate positioning can be realized, so that corresponding screwing operation can be conveniently, accurately and quickly carried out manually, and on the other hand, the problem of misinformation caused by damage or failure of the radio frequency gasket (for example, the chip is damaged, information cannot be read at the moment, and the fact that the radio frequency gasket has a problem but not the nut or bolt is loosened) can be avoided to a certain extent;
2) by using a passive Radio Frequency Identification (RFID) technology, a power supply does not need to be installed and configured, so that the passive Radio Frequency Identification (RFID) device can be used for a long time without the problem that the corresponding function cannot be realized due to the power consumption of the power supply;
3) simple structure, reasonable in design, the structure of gasket part and ordinary gasket is close, has only been two contact terminals of having more switch detection circuit, so simple to operate, passive radio frequency transponder connects in gasket part one side, can effectively avoid bolt or nut extrusion to lead to chip and radio frequency antenna circuit to warp the damage, guarantees that the radio frequency gasket has better life and repeatedly usable.
Drawings
FIG. 1 is a schematic diagram of an RF gasket and its internal circuitry according to the present invention;
FIG. 2 is a front view of the RF gasket of FIG. 1;
FIG. 3 is a schematic structural diagram of an RF gasket when two contact terminals are disposed opposite to each other;
FIG. 4 is a schematic view of the RF gasket of FIG. 1 clamped between a hex bolt and a workpiece;
FIG. 5 is a bottom view of the hex bolt of FIG. 4 (with a copper plating on the end surface in contact with the RF gasket);
fig. 6 is a schematic view of the rf gasket shown in fig. 1 for screw positioning and fastening detection.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a gasket portion; 2. a passive radio frequency transponder portion; 3. a through hole; 4. a chip; 5. a wireless radio frequency antenna circuit; 6. a switch detection circuit; 7. a contact terminal; 8. copper plating; 9. a telescopic column; 10. a chute; 11. a return spring; 12. a reader; 13. a nut; 14. and (4) bolts.
Detailed Description
The principles and features of this invention are described in connection with the drawings and the detailed description of the invention, which are set forth below as examples to illustrate the invention and not to limit the scope of the invention.
In the description of the present invention, if terms indicating orientation such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., are used, they indicate orientation or positional relationship based on that shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the present invention provides a radio frequency gasket, which includes a gasket portion 1 and a passive radio frequency transponder portion 2 connected to the gasket portion 1, wherein a through hole 3 is formed in the gasket portion 1, the through hole allowing a bolt to pass therethrough, the passive radio frequency transponder portion 2 includes an RFID chip 4, a radio frequency antenna circuit 5 electrically connected to the RFID chip 4, and a switch detection circuit 6, the switch detection circuit 6 extends to the gasket portion 1 and is disconnected to form two contact terminals 7, and when and only when the gasket portion 1 is pressed by a nut or a nut of the bolt, the two contact terminals 7 are turned on to form a conduction loop for the switch detection circuit 6.
It should be noted that, when a screw hole for screwing a bolt is formed in a workpiece or equipment, as shown in fig. 4, a nut matched with the bolt does not need to be arranged at this time, and the radio frequency gasket provided by the present invention can also be used in this case, and the radio frequency gasket is clamped between a fixing nut at one end of the bolt and the workpiece, that is, the nut in the present invention refers to a cap-shaped body formed by integrally forming one end of the bolt; when the bolt has a nut matching the bolt, the rf gasket is usually clamped between the workpiece and the nut, as shown in fig. 6.
In one embodiment of the invention, the spacer part 1 is in the shape of a ring sheet made of insulating hard material, and the passive radio frequency transponder part 2 is connected to one side of the spacer part 1 and is located outside the contact area of the spacer part 1 and the bolt or nut.
It will be appreciated that the spacer portion is preferably made of an insulating hard material, and not necessarily, and that the spacer portion may be made of a hard metal having a small deformation coefficient if desired, and that the switch detection circuit extending into the spacer portion is provided with an insulating leather sheath, and the two contact terminals are also separated from the metal material of the spacer portion.
In one embodiment of the invention, two of said contact terminals 7 are located on the same side surface of said spacer portion 1 and are circumferentially spaced apart, as shown in particular in fig. 1 and 2.
It should be noted that, in order to ensure that the contact terminals are brought into intimate contact with the respective end faces of the bolt or nut during compression, the contact terminals should preferably be at least flush with or slightly raised from the surface of the respective side of the spacer portion.
On the basis of the above embodiment, the end surface of the nut or nut of the bolt contacting the gasket portion 1 is fixedly provided with a copper ring or a copper plating layer 8 for contacting the two contact terminals 7, respectively, specifically, as shown in fig. 5, when the hexagon bolt is screwed on the workpiece, the ring-shaped copper plating layer 8 on the lower end surface of the hexagon cap body is in close contact with and conducted with the two contact terminals of the rf gasket.
In an embodiment of the present invention, as shown in fig. 3, two of the contact terminals 7 correspond to each other up and down, and at least one of the contact terminals 7 is fixed on an end surface of a telescopic column 9, when the gasket portion 1 is pressed by a bolt or a nut, the contact terminal 7 on the telescopic column 9 approaches and contacts another contact terminal 7, and after the bolt or the nut is unscrewed, the telescopic column 9 returns to disengage the two contact terminals 7.
On the basis of the above embodiment, the gasket portion 1 is provided with a sliding groove 10 for inserting the telescopic column 9, one end of the telescopic column 9 is located in the sliding groove 10, the other end of the telescopic column extends out of the sliding groove 10, a return spring 11 is arranged in the sliding groove 10, one end of the return spring 11 is abutted against the telescopic column 9, the other end of the return spring is abutted against the bottom of the sliding groove 10, one contact terminal 7 is fixed at one end of the telescopic column 9 located in the sliding groove 10, and the other contact terminal 7 is fixed at the bottom of the sliding groove 10.
It should be noted that, under the condition that the telescopic column and the sliding groove are used in cooperation, the two contact terminals are not limited to the situation that the two contact terminals are opposite up and down in the above embodiment, but the two contact terminals are spaced apart in the circumferential direction of the gasket portion, at this time, the two contact terminals can be both located inside the gasket portion and fixed at the groove bottom of the corresponding sliding groove, each contact terminal corresponds to one telescopic column, at this time, the telescopic column itself is a conductor, and a copper ring sheet or a copper plating layer is arranged on one surface of the nut or the nut pressing gasket portion of the bolt, so that when in a pressing state, the conduction of the switch detection circuit can be well ensured.
In one embodiment of the invention, the gasket part 1 and the passive radio frequency transponder part 2 are coated with a weather-resistant and corrosion-resistant plastic coating.
In one embodiment of the present invention, the effective identification distance between the passive radio frequency tag part 2 and the reader 12 matched with the passive radio frequency tag part is more than 10 m.
The invention also provides a screw fastener which comprises a bolt 14, a nut 13 and the radio frequency gasket, wherein the bolt 14 is fixed on a workpiece (integrally formed or welded) or inserted into a mounting hole (unthreaded hole) of the workpiece, the nut 13 is in threaded connection with the bolt 14, and the radio frequency gasket is clamped between the nut and the workpiece.
The invention also provides a method for detecting the positioning and tightness of the screw fastener, which comprises the following steps: the radio frequency gasket is sleeved on each bolt for detecting the position, then the bolts or nuts on the bolts are screwed one by one to enable the gasket part 1 to be pressed tightly, at the moment, the wireless radio frequency antenna circuit 5 and the switch detection circuit 6 are both conduction loops, if the gasket part 1 is kept pressed tightly by the bolts or nuts and is not loosened, a screw position signal transmitted by the radio frequency gasket and a signal representing that the switch detection circuit 6 is conducted and the screw is not loosened can be remotely received through the reader 12, and at the moment, a maintenance measure is not needed; if the gasket part 1 cannot be pressed, the switch detection circuit 6 is broken, and the reader 12 can remotely receive the screw position information transmitted by the radio frequency gasket and a signal representing that the switch detection circuit is broken and the screw is loosened, at this time, a maintenance measure needs to be adopted, and a corresponding nut or bolt is accurately found according to the screw position information for screwing operation. As shown in fig. 6, the rf gasket on the left side of the two detection bits is pressed, the switch detection circuit forms a conducting loop, the rf gasket on the right side is not pressed due to the loose nut, and the switch detection circuit is turned off.
It should be noted that, when a device has a plurality of nuts or bolts to be tightness-detected, a plurality of detection positions can be numbered, the number information is recorded in the device specification or the computer for filing (the position is determined according to the number information when maintenance is convenient), when the radio frequency gasket of the invention is used for positioning and tightness detection of the screw fastener, the number information of the corresponding detection position is stored in the RFID chip of each radio frequency gasket, the reader can read the number information of each detection position and the information of whether the switch detection circuit at the corresponding detection position is conducted, for example, the number information received by the reader when the reader is conducted is pressed is followed by the number "1" representing "normal", otherwise, the number "0" representing "abnormal" is followed, if the reader cannot read the number information of a certain detection position, the radio frequency gasket is damaged (at this time, the bolt or the nut may be fastened), the gasket needs to be replaced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The radio frequency gasket is characterized by comprising a gasket part (1) and a passive radio frequency transponder part (2) connected with the gasket part, wherein a through hole (3) which penetrates through the gasket part up and down for a bolt to pass through is formed in the gasket part (1), the passive radio frequency transponder part (2) comprises an RFID chip (4), a radio frequency antenna circuit (5) and a switch detection circuit (6) which are electrically connected with the RFID chip, the switch detection circuit (6) extends to the gasket part (1) and is disconnected to form two contact terminals (7), and when and only when the gasket part (1) is pressed by a nut or a nut of the bolt, the two contact terminals (7) are conducted to enable the switch detection circuit (6) to form a conducting loop.
2. A radio frequency gasket according to claim 1, characterized in that the gasket part (1) is in the form of a ring of insulating hard material, and the passive radio frequency transponder part (2) is attached to one side of the gasket part (1) outside the nut or nut contact area of the gasket part (1) and the bolt.
3. A radio frequency gasket as claimed in claim 1, characterized in that the two contact terminals (7) are located on the same side surface of the gasket portion (1) and are circumferentially spaced apart.
4. A radio frequency gasket according to claim 3, characterized in that the end face of the bolt nut or nut in contact with the gasket portion (1) is fixedly provided with a copper ring sheet or a copper plating (8) for contacting with the two contact terminals (7), respectively.
5. A radio frequency gasket according to claim 1, wherein two said contact terminals (7) are up and down corresponding and at least one said contact terminal (7) is fixed on the end face of a telescopic column (9), when said gasket portion (1) is pressed by the nut or nut of a bolt, said contact terminal (7) on said telescopic column (9) approaches and contacts the other said contact terminal (7), and after said bolt or nut is unscrewed, said telescopic column (9) returns to disengage said two said contact terminals (7).
6. The radio frequency gasket as recited in claim 5, wherein the gasket portion (1) is provided with a sliding groove (10) for inserting the telescopic post (9), one end of the telescopic post (9) is located in the sliding groove (10), the other end of the telescopic post extends out of the sliding groove (10), a return spring (11) is arranged in the sliding groove (10), one end of the return spring (11) abuts against the telescopic post (9), the other end of the return spring abuts against the groove bottom of the sliding groove (10), one of the contact terminals (7) is fixed at one end of the telescopic post (9) located in the sliding groove (10), and the other contact terminal (7) is fixed at the groove bottom of the sliding groove (10).
7. A radio frequency gasket as claimed in any one of claims 1 to 6, characterised in that the gasket portion (1) and the passive radio frequency transponder portion (2) are each coated externally with a weather-resistant, corrosion-resistant plastic coating.
8. A radio frequency gasket as claimed in any one of claims 1 to 6, characterised in that the effective identification distance between the passive radio frequency transponder part (2) and its associated reader (12) is above 10 m.
9. A screw fastener comprising a bolt, a nut and the rf gasket of any one of claims 1 to 8, wherein the bolt is fixed to a workpiece or inserted into a mounting hole of the workpiece, the nut is threadedly connected to the bolt, and the rf gasket is interposed between the nut and the workpiece.
10. A method for detecting the positioning and tightness of a screw fastener is characterized by comprising the following steps: the method comprises the steps that a radio frequency gasket according to any one of claims 1 to 8 is sleeved on each bolt for detecting the position, then the bolts or nuts on the bolts are screwed one by one to enable the gasket part (1) to be pressed, at the moment, the radio frequency antenna circuit (5) and the switch detection circuit (6) are both conduction loops, if the gasket part (1) is kept to be pressed by the nut or nut of the bolt and not to be loosened, a screw position signal transmitted by the radio frequency gasket and a signal representing that the switch detection circuit (6) is conducted and the screw is not loosened can be remotely received through a reader (12), and at the moment, maintenance measures are not needed; if the gasket part (1) cannot be pressed, the switch detection circuit (6) is broken, a screw position signal transmitted by the radio frequency gasket and a signal representing that the switch detection circuit is broken and the screw is loosened can be remotely received through the reader (12), at the moment, a maintenance measure needs to be adopted, and a corresponding nut or bolt is accurately found according to the screw position information to carry out screwing operation.
CN202110166728.1A 2021-02-04 2021-02-04 Radio frequency gasket, screw fastener and positioning and tightness detection method thereof Active CN113007202B (en)

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CN209393885U (en) * 2018-12-18 2019-09-17 华腾实业(深圳)股份有限公司 Metal row pressure machine copper wire frame anti-tipping apparatus
CN209214826U (en) * 2019-02-12 2019-08-06 广西大支电力科技有限公司 It is a kind of for detecting the device of nut tightness adjusting degree
CN212055467U (en) * 2019-11-25 2020-12-01 中联重科股份有限公司 Gasket, threaded fastener connecting structure and engineering machinery

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