CN110261082A - A kind of RFID label tag and the screw loosening condition monitoring system based on it - Google Patents
A kind of RFID label tag and the screw loosening condition monitoring system based on it Download PDFInfo
- Publication number
- CN110261082A CN110261082A CN201910499661.6A CN201910499661A CN110261082A CN 110261082 A CN110261082 A CN 110261082A CN 201910499661 A CN201910499661 A CN 201910499661A CN 110261082 A CN110261082 A CN 110261082A
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- Prior art keywords
- screw
- conducting wire
- switching regulator
- mechanical structure
- state
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
Abstract
The present invention discloses a kind of RFID label tag and the screw loosening condition monitoring system based on it；Applied to screw status monitoring field, for missing inspection of the existing technology and erroneous detection problem, RFID label construction of the invention is mainly made of antenna and label chip two parts, when chip and antenna are organically connected, can access label by reader equipment；For metallic screw ontology as switching regulator mechanical structure, it determines connection transition "ON" or "Off" between label chip and label antenna, i.e., when screw is secured, label can be read and can communicate with reader；When screw relaxation, will disconnect between chip and label antenna, so as to cause the communication disruption between label and reader；Switching regulator mechanical structure of the invention can be integrated in respectively in label antenna or impedance matching network, constituted an entirety with label, improved the reliability of screw detecting state.
Description
Technical field
The invention belongs to screw status monitoring field, in particular to the communication between a kind of RFID label tag and RFID reader turns
State detection the tightening of screw/relaxed state method and system.
Background technique
Automatically monitor certain structures machine performance become increasingly it is necessary to, especially industry or vehicle environmental in.
In fact, the relaxed state of screw will be greatly reduced the reliability of system, while it can also jeopardize safety.
By operator carry out manual inspection be that one kind possible solution, using the method for extraneous physical markings come into
Row, for example, the working condition of screw can be detected with spiral colour adhesive material.However, for large scale structure, such as train
The inspection of rear portion fixed screw, checking may take a long time by hand.Alternatively possible solution is using can know
The vision system of not any helical position physical change, however, such system need by virtual condition with must save it is old
Image is compared, this is not too much practical for large scale structure.
It is described in patent US7360435B2 and the two-way time variation of longitudinal wave is propagated by measurement bolt end to monitor spiral shell
Bolt tightens situation；But this method is suitable only for tightening the detection of screw, is not suitable for the tightening of screw/relaxed state
Detection.
A kind of device for monitoring extruder temperature and tightening situation is described in patent US0089727A1, including on screw head
Temperature detector and tighten sensor, the monitoring system which proposes passes through containing complicated sensor-based system detection screw
Working condition, wherein sensor-based system is made of two parts, and first part is fixedly attached on head of screw, and second part is for the
The positioning of a part of structure.Device need to design multiple functional module structures, and apparatus structure is more complex.
Describing RFID communication system in patent (application number of invention patent 201810141225.7) mainly includes reader,
RFID label tag.Wherein RFID label construction is divided into two components, and wherein the first component includes the first coupling circuit；Second component packet
Include the second coupling circuit；When screw tightening, the first coupling circuit are connected to the second coupling circuit, indicate that RFID label tag is effective；
When loosened screw, the first coupling circuit are not connected to the second coupling circuit, and RFID label tag is invalid；But the detection method exists
A possibility that screw missing inspection or erroneous detection；It is specific as follows:
1) when screw loosening, implementation according to disclosed in it, the both parts that shank of screw passes through, which exist, does not divide
The possibility opened, at this moment label can also continue still to be detected as tight condition with reader normal communication, screw, and there are screw missing inspections
The problem of；
2) when label in use, the situations such as the coupling circuit being fixed on two components shift, this markers
Label cannot be detected as loosening state with reader normal communication, screw, and at this moment screw can have Error Detected status.Therefore specially
There is screw erroneous detection in technical solution disclosed in benefit.
Summary of the invention
In order to solve the above technical problems, the present invention proposes a kind of RFID label tag and the screw loosening status monitoring based on it
System, when screw is secured, label can be read and can communicate with reader；When screw relaxation when, chip with
It will disconnect between label antenna, so as to cause the communication disruption between label and reader.
One of the technical solution adopted by the present invention are as follows: include: label chip, label antenna, impedance matching network and open
Pass formula mechanical structure, the switching regulator mechanical structure are integrated in label antenna, when switching regulator mechanical structure is closed state,
RFID label tag is in running order；When switching regulator mechanical structure is in an open state, RFID label tag working condition is interrupted；The switch
Formula mechanical structure is realized using screw, and when screw is tightened, switching regulator mechanical structure is closed state, when screw relaxation
When, switching regulator mechanical structure is in an open state.
Another technical solution that the present invention uses are as follows: a kind of RFID label tag, comprising: label chip, label antenna, impedance
Distribution network and switching regulator mechanical structure, the switching regulator mechanical structure are integrated in impedance matching network, switching regulator machinery knot
When structure is closed state, label chip and label antenna impedance matching；When switching regulator mechanical structure is in an open state, label chip
With label antenna impedance mismatch；The switching regulator mechanical structure is realized using screw, when screw is tightened, switching regulator machine
Tool structure is closed state, and when screw relaxation, switching regulator mechanical structure is in an open state.
One of described switching regulator mechanical structure implementation, comprising: medium substrate, the first conducting wire, the second conducting wire and spiral shell
Adjusting screw, the medium substrate include at least the matched screw hole of screw thread with screw, and screw passes through the screw hole, works as screw
When nail is tightened, first conducting wire is connected to the second conducting wire by head of screw；When screw relaxation, first conducting wire and the
It is in off state between two conducting wires.
The two of the switching regulator mechanical structure implementation, comprising: first switch contact, second switch contact, conducting wire with
And screw, the conducting wire are fixed on screw ontology, when screw is tightened, conducting wire first end and first switch contact connect
Logical, conducting wire second end is connected to second switch contact；When screw relaxation, in disconnected between conducting wire first end and first switch contact
Line state is in off state between conducting wire second end and second switch contact.
The present invention also provides the RFID systems that a kind of monitoring screw loosens state, including a kind of any of the above-described RFID mark
Label and RFID reader；When switching regulator mechanical structure is closed state, RFID reader and RFID label tag are in normal communication
State；When switching regulator mechanical structure is in an open state, RFID reader and RFID label tag communications status are abnormal.
Beneficial effects of the present invention: the present invention realizes the change of the state of mechanical switch by the relaxed condition of screw
Change, thus the communication variation being rendered as between RFID label tag and RFID reader, so that passing through monitoring RFID label tag and RFID read-write
Communication between device changes in advance to the monitoring effect of screw tightness state；The present invention not only can by judge RFID label tag with
Communication between RFID reader cut-offs to obtain the elastic state of screw；Also pass through the closure and opening of switching regulator mechanical structure
Influence impedance matching network matching and mismatch, by judge the communication between RFID label tag and RFID reader whether normally come
Obtain the elastic state of screw；Advantages of the present invention is as follows:
1, detection system of the invention uses complete RFID label construction, and switching regulator mechanical structure can be integrated in mark respectively
It signs in antenna or impedance matching network, is not required to consider the factor of fixation of label construction etc., improves screw detecting state
Reliability；
2, switching regulator mechanical structure takes full advantage of screw body, when screw, which rotates, to be loosened, connect with screw body
Conducting wire generates displacement immediately；The antenna integrated so as to cause the switch mechanical structure or matching network partial failure；According to
Whether impedance matching between label and antenna, to judge the state of screw.
Detailed description of the invention
Fig. 1 is the screw relaxed state detection system provided in an embodiment of the present invention based on RFID communication；
Fig. 2 is a kind of block diagram of label chip provided in an embodiment of the present invention；
Fig. 3 is the implementation of label chip shown in Fig. 2 provided in an embodiment of the present invention；
Fig. 4 is a kind of implementation of switching regulator mechanical structure provided in an embodiment of the present invention；
Fig. 5 is another implementation of switching regulator mechanical structure provided in an embodiment of the present invention；
Wherein, 1 is RFID reader, and 2 be RFID label tag, and 11 be the transceiver module of RFID reader, and 12 be RFID read-write
The antenna of device, 21 be the antenna of RFID label tag, and 22 be the label chip of RFID label tag, and 23 be impedance matching network, and 3 be switching regulator
Mechanical structure, 4 be PC machine, and 5 be screw, and 311 be the first conducting wire, and 312 be the second conducting wire, and 313 medium substrates, 321 be first
Switch contact, 322 be second switch contact, and 323 be privates.
Specific embodiment
For convenient for those skilled in the art understand that technology contents of the invention, with reference to the accompanying drawing to the content of present invention into one
Step is illustrated.
System of the invention is used to detect the state of fastener, when fastener is in tightening state, RFID chip read-write
Device and RFID label tag are in normal communication state；Fastener be releasing orientation when, RFID reader (i.e. reader in Fig. 1) with
RFID label tag communications status is abnormal；Here fastener can be tight with screw thread for screw threads for fastening or buckle fastening, the present embodiment
For Gu
The present invention is switched by screw (or a part of structural screws head) simulated implementation mechanical structure formula, to RFID chip
The influence of the working condition of (the tag chip in Fig. 2) is as shown in Figure 1 this to realize the monitoring to the elastic state of screw
Embodiment provide the screw relaxed state detection system based on RFID communication, comprising: RFID chip, RFID reader and
Switching regulator mechanical structure, when switching regulator mechanical structure is closed state, RFID reader and RFID label tag are in normal communication
State；When switching regulator mechanical structure is in an open state, RFID reader and RFID label tag communications status are abnormal.
RFID reader 1 is made of reader RF receiving and transmission module 11 and radiant section (antenna) 12.
PC machine 5 can be used to manage whole system.
It is illustrated in figure 2 a kind of block diagram of label chip provided in an embodiment of the present invention, RFID label tag 2 includes: antenna
21, label chip 22, impedance matching network 23 (the impedance matching network in Fig. 2), label chip 22 wrap
All circuit structures required when normal communication are contained, have further included the 3 (Fig. 2 of switching regulator mechanical structure for detecting screw relaxed state
In switch like mechanism)；By between label chip 22 and label antenna 21 design impedance matching network 23 come
Realize the optimal power transmission between antenna 21 and label chip 22.
As shown in figure 3, switching regulator mechanical structure 3 is connected between label antenna 21 and impedance matching network 23；Work as screw
When nail (screw in Fig. 3) is tightened, switching regulator mechanical structure 3 must assure that electrically continuous between antenna 21 and label chip 22
Property (passing through impedance matching network), label chip 22 can normally receive the request signal from RFID reader 1 and response；
Otherwise, when loosened screw, then class switching regulator mechanical structure is in an open state, be isolated between antenna 21 and label chip 22 and
It disconnects, so that label can not normal communication.
Switching regulator mechanical structure 3 can be integrated in respectively in label antenna 21 or impedance matching network 23, when switching regulator machinery
When structure 3 disconnects, label chip 22 and antenna impedance mismatch state, label cannot be with reader normal communications, so that detection obtains
The loosening state of screw.
Two kinds of implementations of switching regulator mechanical structure 3 are given in the present embodiment:
One of implementation is as shown in Figure 4, comprising: the first conducting wire 311, the second conducting wire 312 and medium substrate
313, medium substrate 313 includes at least the matched screw hole of screw thread with screw 4, and screw passes through the screw hole, works as screw
When nail 4 is tightened, the first conducting wire 311 is connected to the second conducting wire 312 by head of screw；When screw relaxation, the first conducting wire 311 with
It is in off state between second conducting wire 312.Specifically further include: the first conducting wire 311, the respective other end difference of the second conducting wire 312
It is connected with antenna 21 or impedance matching network 23.The first conducting wire 311, the second conducting wire 312 in the present embodiment pass through welding manner
It is fixed on medium substrate 313, and when screw-driving, reinforcement is played to the first conducting wire 311, the second conducting wire 312 and is fixed
Effect, only when screw loosening, the electrical connection between the first conducting wire 311, the second conducting wire 312 just be will disconnect.
Wherein another implementation is as shown in Figure 5, comprising: first switch contact 321, second switch contact 322 and
Privates 323, the privates 323 are fixed on screw ontology, and in the present embodiment, privates 323 is fixed on
On screw cap, when screw is tightened, privates first end is connected to first switch contact 321, privates second end
It is connected to second switch contact 322；When screw relaxation, in disconnected between 323 first end of privates and first switch contact 311
Line state is in off state between 323 second end of privates and second switch contact 322.Specifically further include: first switch touching
First 321, respectively it is connected with antenna 21 or impedance matching network 23 for second switch contact 322.
In the implementation of Fig. 5, since the electric conductivity of screw and metal flat will affect the normal communication function of label,
Privates need to be with isolation coat.Privates 323 in Fig. 5 has certain intensity, only when screw body loosens
When, it can just be subjected to displacement, privates 323 and first switch contact 321, second switch contact 322 is caused to disconnect.
According to fig. 2 and embodiment shown in fig. 5, the present invention can also be directly realized by switching regulator machinery on screw-rod structure
Structure guarantees conducting continuity when screw rod is tightened, and structure is isolated and interrupts when screw rod relaxes；For example first switch will be connected
Contact 321, second switch contact 322 privates 323 be fixed on screw-rod structure, when screw rod is tightened, privates
One end is connected to first switch contact 321, and privates second end is connected to second switch contact 322, guarantees antenna and label
Electric continuity between chip；When screw rod relaxation, in breaking shape between 323 first end of privates and first switch contact 311
State is in off state between 323 second end of privates and second switch contact 322, so that label can not normal communication.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.For ability
For the technical staff in domain, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of RFID label tag characterized by comprising label chip, label antenna, impedance matching network and switching regulator machine
Tool structure, the switching regulator mechanical structure are integrated in label antenna, when switching regulator mechanical structure is closed state, RFID label tag
It is in running order；When switching regulator mechanical structure is in an open state, RFID label tag working condition is interrupted；The switching regulator machinery knot
Structure is realized using screw, and when screw is tightened, switching regulator mechanical structure is closed state, when screw relaxation, switch
Formula mechanical structure is in an open state.
2. a kind of RFID label tag according to claim 1, the switching regulator mechanical structure includes: medium substrate, first leads
Line, the second conducting wire and screw, the medium substrate include at least the screw hole corresponding with screw, and screw passes through
The screw hole, when screw is tightened, first conducting wire is connected to the second conducting wire by head of screw；When screw relaxation,
It is in off state between first conducting wire and the second conducting wire.
3. a kind of RFID label tag according to claim 1, the switching regulator mechanical structure includes: first switch contact,
Two switch contacts, conducting wire and screw, the conducting wire are fixed on screw ontology, when screw is tightened, conducting wire first
End is connected to first switch contact, and conducting wire second end is connected to second switch contact；When screw relaxation when, conducting wire first end with
It is in off state between first switch contact, is in off state between conducting wire second end and second switch contact.
4. a kind of RFID label tag characterized by comprising label chip, label antenna, impedance matching network and switching regulator machine
Tool structure, the switching regulator mechanical structure are integrated in impedance matching network, when switching regulator mechanical structure is closed state, label
Chip and label antenna impedance matching；When switching regulator mechanical structure is in an open state, label chip and label antenna impedance are not
Match；The switching regulator mechanical structure is realized using screw, and when screw is tightened, switching regulator mechanical structure is closed state,
When screw relaxation, switching regulator mechanical structure is in an open state.
5. a kind of RFID label tag according to claim 4, the switching regulator mechanical structure includes: medium substrate, first leads
Line, the second conducting wire and screw, the medium substrate include at least the matched screw hole of screw thread with screw, and screw is worn
The screw hole is crossed, when screw is tightened, first conducting wire is connected to the second conducting wire by head of screw；When screw relaxation
When, it is in off state between first conducting wire and the second conducting wire.
6. a kind of RFID label tag according to claim 4, the switching regulator mechanical structure includes: first switch contact,
Two switch contacts, conducting wire and screw, the conducting wire are fixed on screw ontology, when screw is tightened, conducting wire first
End is connected to first switch contact, and conducting wire second end is connected to second switch contact；When screw relaxation when, conducting wire first end with
It is in off state between first switch contact, is in off state between conducting wire second end and second switch contact.
7. the RFID system that a kind of monitoring screw loosens state, which is characterized in that include at least: any in claims 1 to 3
RFID label tag described in one claim.
8. the RFID system that a kind of monitoring screw according to claim 7 loosens state, which is characterized in that further include:
RFID reader, when switching regulator mechanical structure is closed state, RFID reader and RFID label tag are in communications status；Switching regulator
When mechanical structure is in an open state, RFID reader and RFID label tag communications status are interrupted.
9. the RFID system that a kind of monitoring screw loosens state, which is characterized in that include at least: any in claim 4 to 6
RFID label tag described in one claim.
10. the RFID system that a kind of monitoring screw according to claim 9 loosens state, which is characterized in that further include:
RFID reader, when switching regulator mechanical structure is closed state, RFID reader and RFID label tag are in normal communication state；It opens
When pass formula mechanical structure is in an open state, RFID reader and RFID label tag communications status are abnormal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499661.6A CN110261082A (en) | 2019-06-11 | 2019-06-11 | A kind of RFID label tag and the screw loosening condition monitoring system based on it |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499661.6A CN110261082A (en) | 2019-06-11 | 2019-06-11 | A kind of RFID label tag and the screw loosening condition monitoring system based on it |
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| CN110261082A true CN110261082A (en) | 2019-09-20 |
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| CN201910499661.6A Pending CN110261082A (en) | 2019-06-11 | 2019-06-11 | A kind of RFID label tag and the screw loosening condition monitoring system based on it |
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Cited By (3)
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| CN111854597A (en) * | 2020-05-29 | 2020-10-30 | 北京慧宸信博科技有限公司 | Method, device and system for detecting relative rotation between components |
| CN113194189A (en) * | 2021-04-19 | 2021-07-30 | Tcl通讯（宁波）有限公司 | Method and device for detecting state of rear cover of mobile terminal and intelligent terminal |
| CN114236428A (en) * | 2021-12-06 | 2022-03-25 | Comlab（北京）通信系统设备有限公司 | Leakage cable falling monitoring system and method |
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