Screw looseness detection device based on RFID technology

Abstract

The invention discloses a screw looseness detection device based on the RFID technology, and particularly relates to the field of screw looseness detection, the screw looseness detection device comprises a screw, the outer surface of the top end of the screw is sleeved with a nut, and the outer surface of the top end of the nut is sleeved with a device body; an electronic tag is arranged below a tongue part at one end of the device body and is parallel to the height of the nut, and a metal shielding sheet is connected to the outer surface of the top end of the device body. According to the rail operation vehicle key part screw looseness detection method based on the RFID technology, the loosened screws at the bottom of the vehicle can be rapidly and accurately detected, real-time monitoring of the screws at the key positions is achieved, and the vehicle running safety is improved. The device for detecting the looseness of the screws / bolts at the important parts of the rail working vehicle transmits the real-time states of the screws / bolts to monitoring personnel through a network by means of a reliable and effective detection device aiming at special scenes of the rail working vehicle.

Description

Technical Field

[0001] The present invention relates to the field of screw loosening detection, and more specifically, to a screw loosening detection device based on RFID technology. Background Art

[0002] Track operation vehicles are multifunctional construction equipment for local operations on the line between large-scale track maintenance machinery and manual operations. Checking whether the screws / bolts in the main parts of the track operation vehicle are loose is conducive to operational safety, reducing accidents, and improving vehicle efficiency. During driving, due to the influence of factors such as corrosion, vibration and impact, it is easy to cause the screws / bolts to deform, loosen, break or fall off, causing equipment failure and even major safety accidents. Therefore, the inspection of the looseness of screws / bolts has always been an important item in the daily vehicle inspection.

[0003] At present, the main method for checking the loose screws / bolts of rail vehicles is manual inspection, which mainly includes the screw tapping and listening test, wrench tightening inspection method, line drawing and marking method, etc. These methods are labor-intensive, inefficient, non-targeted, easy to fatigue, and lead to wrong inspection and missed inspection.

[0004] There are a large number of screws / bolts on rail operation vehicles, and their installation positions are different. The installation positions of many screws / bolts are difficult to observe, which increases the difficulty of inspection.

[0005] Manual inspection of screws / bolts in the main parts of rail operation vehicles is labor-intensive, inefficient, and lacks specificity, and is prone to mis-inspection and missed inspections, which in turn creates potential safety hazards.

[0006] The inspection environment for screws / bolts in important parts of rail operating vehicles is complex, the space is small, and manual inspection is incomplete, making it difficult to detect loose screws / bolts in a timely manner. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a screw loosening detection device based on RFID technology, and a screw loosening detection method for key parts of a rail vehicle based on RFID technology, which can quickly and accurately detect loose screws at the bottom of the vehicle, realize real-time monitoring of screws at key positions, and improve the safety of vehicle operation. The screw / bolt loosening detection device for important parts of a rail vehicle is designed for special scenarios of rail vehicles. Through a reliable and effective detection device, the real-time status of the screw / bolt is transmitted to the monitoring personnel through the network.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a screw loosening detection device based on RFID technology, comprising a screw, a nut is sleeved on the top outer surface of the screw, a device body is sleeved on the top outer surface of the nut, an electronic tag is installed below the tongue part at one end of the device body and at a position parallel to the height of the nut, and a metal shielding sheet is connected to the top outer surface of the device body.

[0009] Furthermore, the shape of the metal shielding sheet is the same as the shape of the top outer surface of the device body.

[0010] Furthermore, a screw extension hole is provided at the center of the device body, and when in the installed state, the top end of the screw 1 extends out from the inside of the screw extension hole.

[0011] Furthermore, a fixing screw is inserted into the outer surface of one side of the fixing screw, and the device body is fixed to the outer surface of the nut by the fixing screw.

[0012] Technical effects and advantages of the present invention:

[0013] It can realize real-time or timed detection of the screw status without wiring and does not affect the installation of the screw. In addition, passive RFID is low-cost and suitable for wide application.

[0014] It is beneficial to improve work efficiency, reduce labor intensity, and avoid accidents caused by loose screws.

[0015] Remote communication allows managers to timely understand the looseness of screws in important parts of each vehicle through the upper software, which is beneficial to vehicle safety management.

[0016] The device can be recycled and is easy to install and disassemble.

[0017] The device is low-cost and can be used on a large scale.

[0018] The electronic tag adopts passive electronic tag, which does not need battery. The electronic tag extracts the power needed for its operation from the radio frequency energy emitted by the reader. It has a long service life and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the device structure of the present invention.

[0020] Figure 2 It is a cross-sectional view of the device of the present invention.

[0021] Figure 3 It is a schematic diagram of the bottom of the device body of the present invention.

[0022] Figure 4 It is a detection schematic diagram of the present invention.

[0023] Figure 5 It is a schematic diagram of looseness detection of the present invention.

[0024] The figures are marked as follows: 1. screw; 2. nut; 3. fixing screw; 4. device body; 5. screw extension hole; 6. metal shielding sheet; 7. electronic tag. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] according to Figure 1-5 A screw loosening detection device based on RFID technology is shown, comprising a screw 1, a nut 2 is sleeved on the top outer surface of the screw 1, a device body 4 is sleeved on the top outer surface of the nut 2, an electronic tag 7 is installed below the tongue part of one end of the device body 4 and at a position highly parallel to the nut 2, a metal shielding sheet 6 is connected to the top outer surface of the device body 4, the code of the electronic tag 7 is recorded in the RFID reader, the RFID reader transmits radio wave energy to the electronic tag, because the metal shielding sheet 6 blocks the electronic tag 7, the electronic tag 7 cannot receive the radio wave radio frequency signal of the RFID reader, and also cannot return a signal to the RFID reader. When the RFID reader cannot detect the return signal of the electronic tag 7, it is considered that the electronic tag 7 is still in the unreadable area behind the metal shielding sheet 6, and it is judged that the screw 1 is not loose.

[0027] Furthermore, the shape of the metal shielding sheet 6 is the same as the shape of the top outer surface of the device body 4. After the device and the electronic tag 7 are installed, the metal shielding sheet 6 on the device body 4 shields the electronic tag 7. The electromagnetic waves emitted by the RFID reader cannot penetrate the metal shielding sheet 6, leaving an unreadable area behind the metal shielding sheet 6, and the electronic tag is just within this area.

[0028] Furthermore, a screw extension hole 5 is opened at the center position of the device body 4. When in the installed state, the top end of the screw 1 extends out from the inside of the screw extension hole 5, and a fixing screw 3 is inserted into the outer surface of one side of the fixing screw 3, and the device body 4 is fixed to the outer surface of the nut 2 by the fixing screw 3. When installing, the nut 2 is installed on the screw 1. After the nut 2 is tightened, the device body 4 is installed on the nut 2 and the device body 4 and the nut 2 are tightly connected by the fixing screw 3. The part of the screw 1 that extends out of the nut 2 passes through the screw extension hole 5.

[0029] Working principle of the present invention:

[0030] The specific installation method is to install the nut 2 on the screw 1. After the nut 2 is tightened, the device body 4 is installed on the nut 2 and the device body 4 and the nut 2 are tightly connected with the fixing screw 3. The part of the screw 1 extending out of the nut 2 extends through the screw hole 5.

[0031] After the device body 4 is installed and fixed, the anti-metal electronic tag 7 is installed at the lower part of the tongue part of the device body 4, parallel to the bottom of the nut 2. At this time, the metal shielding sheet 6 just blocks the electronic tag 7.

[0032] like Figure 4 As shown, after the device and the electronic tag 7 are installed, the metal shielding sheet 6 on the device body 4 shields the electronic tag 7, and the electromagnetic waves emitted by the RFID reader cannot penetrate the metal shielding sheet 6, leaving an unreadable area behind the metal shielding sheet 6, and the electronic tag is just within this area.

[0033] The code of the electronic tag 7 is recorded in the RFID reader, and the RFID reader transmits radio wave energy to the electronic tag. Since the metal shielding sheet 6 blocks the electronic tag 7, the electronic tag 7 cannot receive the radio wave radio frequency signal of the RFID reader, and cannot return a signal to the RFID reader. When the RFID reader cannot detect the return signal of the electronic tag 7, it is considered that the electronic tag 7 is still in the unreadable area behind the metal shielding sheet 6, and it is determined that the screw 1 is not loose.

[0034] like Figure 5 As shown, when the screw 1 is loosened, the nut 2 rotates to drive the device body 4 and the metal shielding sheet 6 to rotate at the same time. When it rotates to a certain position, the shielding of the metal shielding sheet 6 cannot move within the detection range, and the electronic tag 7 leaks out. At this time, the electronic tag 7 is in the detectable range, and the RFID reader electronic tag emits radio waves. The electronic tag 7 receives the radio frequency signal emitted by the RFID reader and sends out the information stored in the chip with the energy obtained by the induced current. The electronic tag 7 receives the microwave signal transmitted by the radio frequency identification reader and obtains energy through the electromagnetic induction coil to briefly power itself, thereby completing this information exchange. The RFID reader reads the information and decodes it, and then sends it to the central information system for data processing.

[0035] When the RFID reader receives the signal from the electronic tag 7, it considers that the screw 1 is loose, and the RFID reader sends an alarm message to the third party, prompting the staff to check the screw 1 at that position.

[0036] Since the device body 4 and the nut 2 are mechanically connected, the staff can remove the device body 4 when tightening the screw 1 after receiving the alarm, and then install the device body 4 back after tightening the screw 1.

[0037] The device can be recycled, and the material of the device body 4 is ABS material, which is low in cost.

[0038] The electronic tag 7 is a passive electronic tag without a built-in battery. When it is outside the reading range of the reader, the electronic tag 7 is in a passive state. When it is within the reading range of the reader, the electronic tag 7 extracts the power required for its operation from the radio frequency energy emitted by the reader.

[0039] RFID readers can be either fixed or handheld.

Claims

1. A screw loosening detection device based on RFID technology, comprising a screw (1), characterized in that: The top outer surface of the screw (1) is sleeved with a nut (2), the top outer surface of the nut (2) is sleeved with a device body (4), an electronic tag (7) is installed below the tongue portion of one end of the device body (4) and at a position highly parallel to the nut (2), and the top outer surface of the device body (4) is connected to a metal shielding sheet (6).

2. The screw loosening detection device based on RFID technology according to claim 1 is characterized in that: The shape of the metal shielding sheet (6) is the same as the shape of the top outer surface of the device body (4).

3. The screw loosening detection device based on RFID technology according to claim 1 is characterized in that: A screw extension hole (5) is provided at the center of the device body (4), and when in the installed state, the top end of the screw (1) extends out from the inside of the screw extension hole (5).

4. The screw loosening detection device based on RFID technology according to claim 1 is characterized in that: A fixing screw (3) is inserted into the outer surface of one side of the fixing screw (3), and the device body (4) is fixed to the outer surface of the nut (2) by the fixing screw (3).

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