CN109272092B - UHF RFID tag capable of detecting screw looseness - Google Patents
UHF RFID tag capable of detecting screw looseness Download PDFInfo
- Publication number
- CN109272092B CN109272092B CN201811011006.3A CN201811011006A CN109272092B CN 109272092 B CN109272092 B CN 109272092B CN 201811011006 A CN201811011006 A CN 201811011006A CN 109272092 B CN109272092 B CN 109272092B
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- screw
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- follow
- detected
- rfid tag
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07745—Mounting details of integrated circuit chips
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
Abstract
The invention discloses a UHF RFID tag capable of detecting screw looseness, which comprises a tag body and a follow-up body, wherein the tag body is provided with a first end and a second end; the tag body is provided with an RFID tag antenna and a tag chip; the tag chip is connected with the RFID tag antenna; the method is characterized in that: a screw mounting hole is formed in the center of the follow-up body, and the shape of the screw mounting hole is matched with the head of a screw to be detected; the follow-up body is sleeved on the screw to be detected, the screw head of the screw to be detected is embedded into the screw mounting hole, and the screw to be detected rotates to drive the follow-up body to rotate correspondingly; the label body is arranged on the outer side of the follow-up body; the inner surface of the tag body is provided with two conducting strips which are respectively connected with the tag chip through loosening detection leads; a conductive spring is embedded in the follow-up body, and two ends of the conductive spring extend outwards and are respectively connected with the two conductive sheets; the invention can detect the loosening state of the screw and realize the automatic detection of the state of the screw; can be widely applied to various vehicles.
Description
Technical Field
The invention relates to a UHF RFID tag, in particular to a UHF RFID tag capable of detecting screw looseness.
Background
With the social development and the improvement of the modernization degree, transportation plays a greater and greater role in social life and social production, and most of ordinary people depend on trains for going out. The train is an important guarantee of the transport capacity of people in China, the train runs at a high speed under full load every day, thousands of screws are arranged in a train, once a certain screw is loosened, serious accidents can be caused, inconvenience is brought to the life and production of people, and great social influence and economic loss are caused when the safety of the life and property of people is seriously threatened. At present, the screw detection content of a carriage mainly comprises two conditions of loosening and falling, due to the limitation of equipment conditions, the manual visual inspection and manual recording modes are mainly adopted, the number of screws is large, the position distribution is wide, and the detection workload is very large. Therefore, the existing detection mode has the defects of multiple human factors, high management cost, low inspection data informatization degree and the like.
UHF RFID equipment is adopted for inspection and serves as a new equipment management mode, the fault position can be found in time, and the accident is eliminated in the bud state. Because RFID has higher detection efficiency, networking operation and remote monitoring can be implemented, the workload of detection personnel is greatly reduced, and the starting success rate and the availability rate of the unit are improved. Therefore, RFID is of great significance in railway car screw detection applications.
Disclosure of Invention
The invention aims to provide a UHF RFID tag capable of detecting screw looseness.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a UHF RFID tag capable of detecting screw looseness comprises a tag body and a follow-up body; the tag body is provided with an RFID tag antenna and a tag chip; the tag chip is connected with the RFID tag antenna;
the method is characterized in that: a screw mounting hole is formed in the center of the follow-up body, and the shape of the screw mounting hole is matched with the head of a screw to be detected; the follow-up body is sleeved on the screw to be detected, the screw head of the screw to be detected is embedded into the screw mounting hole, and the screw to be detected rotates to drive the follow-up body to rotate correspondingly; the label body is arranged on the outer side of the follow-up body; the inner surface of the tag body is provided with two conducting strips which are respectively connected with the tag chip through loosening detection leads; a conductive spring is embedded in the follow-up body, and two ends of the conductive spring extend outwards and are respectively connected with the two conductive sheets.
The invention utilizes the RFID wireless radio frequency mode to carry out non-contact bidirectional data transmission between the reader-writer and the radio frequency label so as to achieve the purposes of target identification and data exchange. Since the screw to be detected is mounted on a metal material, the RFID tag requires a metal-resistant design. According to the conventional method, if the RFID tag is mounted on the screw, it is possible to detect whether the screw is detached, but it is impossible to detect whether the screw is loosened. According to the application scene of the screw, the structural design of the tag is carried out, and the state of the screw, namely whether the screw is in a normal state or in a loosening and dropping state can be detected by utilizing the characteristic that the reading value of a certain storage position is different in the connection and disconnection states of the loosening detection lead.
According to the preferable scheme of the UHF RFID tag capable of detecting the loosening of the screw, the tag body is fixed on the tag frame, and the tag frame is fixed on the mounting surface of the screw to be detected.
The UHF RFID tag capable of detecting the screw looseness has the advantages that: the invention utilizes the RFID wireless radio frequency mode to carry out non-contact bidirectional data transmission between the reader-writer and the radio frequency label, and utilizes the characteristic that the anti-loosening detection label has different reading values at a certain storage position in the disconnection and disconnection states, so that the state of the screw can be detected, namely the normal state, the loosening state or the falling state, and the automatic detection of the state of the screw in the carriage can be realized by matching with the reader-writer and management software; the method has the characteristics of low cost, convenient use and accurate detection, and can be widely applied to various vehicles.
Drawings
Fig. 1 is a schematic structural diagram of a UHF RFID tag capable of detecting screw loosening according to the present invention.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a partially enlarged view in the direction B in fig. 2.
Detailed Description
Referring to fig. 1 to 4, a UHF RFID tag capable of detecting screw loosening includes a tag body 1 and a follower body 2; the tag body 1 is provided with an RFID tag antenna 4 and a tag chip 3; the tag chip 3 is connected with the RFID tag antenna 4; a screw mounting hole is formed in the center of the follow-up body 2, and the shape of the screw mounting hole is matched with the head of a screw 5 to be detected; the follow-up body 2 is sleeved on the screw 5 to be detected, the head of the screw 5 to be detected is embedded into the screw mounting hole, and the screw 5 to be detected rotates to drive the follow-up body 2 to rotate correspondingly; the label body 1 is arranged on the outer side of the follow-up body 2; the inner surface of the label body 1 is provided with two conducting strips 9, and the conducting strips 9 are respectively connected with the label chip 3 through the loosening detection lead 6; a conductive spring 8 is embedded in the follower 2, and two ends of the conductive spring 8 extend outwards and are respectively connected with two conductive sheets 9.
In a specific embodiment, the tag body 1 is fixed on a tag holder 7, and the tag holder 7 is fixed on a mounting surface of the screw 5 to be detected.
When the device is used specifically, the follow-up body 2 and the sticker body 1 can be installed in a certain area on the installation surface of the screw 5 to be detected. After the screw 5 to be detected is firmly installed, the follower 2 is installed firstly, and then the label holder 7 is installed. The label holder can be attached to the mounting surface of the screw to be detected through the adhesive sticker 9. The shape of the screw mounting hole of the follower body 2 is the same as the shape of the nail head of the screw to be detected. Two loosening detection lead wires 6 are arranged on the tag body and connected with the tag chip. A conductive spring is embedded in the follow-up body 2, two ends of the conductive spring extend outwards and are respectively connected with two conductive sheets 9, and the conductive sheets 9 are respectively connected with the tag chip 3 through a looseness detection lead 6; when the screw to be detected is loosened, the follow-up body is driven to rotate, the connection between the conducting strip 9 and the conducting spring 8 is disconnected, and the RFID value read by an external reader-writer is different from the value of the connection state when the screw is not loosened, so that whether the screw is loosened or falls off can be distinguished.
The above implementation results show that: the invention detects whether the screw is loosened or not through the UHF RFID tag and can automatically judge whether the screw is in a normal, loosened or falling state. And meanwhile, the automatic detection of the screw state of the carriage can be realized by matching with a reader-writer and management software.
Claims (2)
1. A UHF RFID tag capable of detecting screw looseness comprises a tag body (1) and a follow-up body (2); the tag body (1) is provided with an RFID tag antenna (4) and a tag chip (3); the tag chip (3) is connected with the RFID tag antenna (4);
the method is characterized in that: a screw mounting hole is formed in the center of the follow-up body (2), and the shape of the screw mounting hole is matched with the head of a screw (5) to be detected; the follow-up body (2) is sleeved on the screw (5) to be detected, the head of the screw is embedded into the screw mounting hole, and the screw (5) to be detected rotates to drive the follow-up body (2) to rotate correspondingly; the tag comprises a tag body (1), a tag chip (3) and a follow-up body (2), wherein the tag body (1) is arranged on the outer side of the follow-up body (2), two conducting strips (9) are arranged on the inner surface of the tag body (1), and the conducting strips (9) are respectively connected with the tag chip (3) through loosening detection leads (6); a conductive spring (8) is embedded in the follow-up body (2), and two ends of the conductive spring (8) extend outwards and are respectively connected with the two conductive sheets (9);
when the screw to be detected loosens, the follow-up body is driven to rotate, the connection between the conducting strip (9) and the conducting spring (8) is disconnected, and the RFID value read by an external reader-writer is different from the value when the screw is not loosened, so that whether the screw is loosened or falls off is distinguished.
2. The UHF RFID tag capable of detecting screw loosening according to claim 1, wherein: the tag body (1) is fixed on the tag frame (7), and the tag frame (7) is fixed on the mounting surface of the screw to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011006.3A CN109272092B (en) | 2018-08-31 | 2018-08-31 | UHF RFID tag capable of detecting screw looseness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011006.3A CN109272092B (en) | 2018-08-31 | 2018-08-31 | UHF RFID tag capable of detecting screw looseness |
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| Publication Number | Publication Date |
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| CN109272092A CN109272092A (en) | 2019-01-25 |
| CN109272092B true CN109272092B (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811011006.3A Active CN109272092B (en) | 2018-08-31 | 2018-08-31 | UHF RFID tag capable of detecting screw looseness |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261082A (en) * | 2019-06-11 | 2019-09-20 | 电子科技大学 | A kind of RFID label tag and the screw loosening condition monitoring system based on it |
| CN111829768B (en) * | 2020-07-28 | 2022-07-01 | 哈尔滨工业大学 | Bolt looseness perception device based on piezoelectric traction effect |
| CN112050726A (en) * | 2020-08-05 | 2020-12-08 | 中车长春轨道客车股份有限公司 | Rail vehicle fastener loosening detection method based on RFID tag array |
| CN112362327B (en) * | 2020-11-12 | 2023-02-03 | 重庆大学 | Application method of intelligent threaded fastener |
| CN112697183B (en) * | 2020-12-01 | 2021-12-07 | 同济大学 | Bolt looseness sensor and looseness monitoring system based on double-arc patch antenna |
| CN113218299B (en) * | 2021-04-20 | 2022-09-20 | 同济大学 | Bolt detection device and system based on double-ring patch antenna with label |
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| CN109272092A (en) | 2019-01-25 |
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