A vibration-adaptive detection vehicle distance signal triggering device

Abstract

This invention relates to a vibration-adaptive distance signal triggering device for inspection vehicles. It primarily addresses the technical problems of existing inspection equipment signal triggering devices, such as poor vibration resistance, unstable performance, and low measurement accuracy. The inspection vehicle distance signal triggering device consists of three parts: an elastic connecting rod, a coupling rotation and fixing mechanism, and a data processing system. The elastic connecting rod is connected to the coupling rotation and fixing mechanism, both of which are fixed to the moving carrier. The encoder trigger signal within the coupling rotation and fixing mechanism is transmitted to the data processing system for signal processing via a data line. The connection via a tension spring ensures that the connecting sleeve remains relatively stationary and stable during movement.

Description

Technical Field

[0001] This invention relates to a distance signal triggering device, and in particular discloses a vibration adaptive detection vehicle distance signal triggering device based on an encoder, which is applied in the field of automated detection. Background Technology

[0002] In recent years, with the increasing maturity of machine vision-based rapid inspection technology, intelligent inspection technology has been rapidly promoted and applied in transportation infrastructure. Intelligent inspection vehicles integrate numerous precision sensors, and the data acquisition of most sensors needs to be triggered externally at a fixed distance. It is also necessary to maintain the synchronization of data acquisition from each sensor as much as possible, which requires a highly adaptable moving distance signal triggering device.

[0003] Many rangefinder wheel devices based on encoder modifications are available on the market, but most are suitable for low-speed pushing and are difficult to apply to high-speed, high-vibration applications such as automobiles and trains. Patent CN112393662A discloses a rangefinder wheel with a shock-absorbing structure, which is installed on a bicycle wheel. When the wheel is subjected to impacts from uneven road surfaces, the spring between the base and the handlebar assembly can provide cushioning. However, the overall structure of the rangefinder wheel is relatively complex and not suitable for transplantation to mobile carriers such as automobiles and trains. Patent CN114705100A discloses a rangefinder wheel with high stability. By rotating the auxiliary plate and bringing it close to the ground, the auxiliary wheel and the rotating wheel are aligned on the same straight line during measurement. Through multiple sets of gears, the rotating wheel travels in a straight line along a predetermined path when pushed, overcoming the problem of angular deflection that easily occurs when the rotating wheel is used for measurement alone. However, this method is not suitable for high-speed operating scenarios.

[0004] In summary, there is an urgent need for a vibration-adaptive, reliable, and easy-to-install mobile distance signal triggering device. Summary of the Invention

[0005] The purpose of this invention is to design a vibration-adaptive distance signal triggering device for inspection vehicles, mainly to solve the technical problems of poor vibration resistance, unstable performance, and low measurement accuracy of existing inspection equipment signal triggering devices.

[0006] The objective of this invention can be achieved through the following technical solution: a vibration-adaptive detection vehicle distance signal triggering device, comprising three parts: an elastic connecting rod, a coupling rotation and fixing mechanism, and a data processing system; the elastic connecting rod is connected to the coupling rotation and fixing mechanism, and both are fixed on the moving carrier; the encoder trigger signal in the coupling rotation and fixing mechanism is transmitted to the data processing system for signal processing via a data line.

[0007] The elastic connecting rod includes a slide rod A, a bracket, a tension spring, and a slide rod B. The slide rod A and the bracket are clamped and fixed by two bolts. The slide rod B is connected to the coupling rotation fixing mechanism through bolt holes. The two ends of the tension spring are connected to the slide rod A and the slide rod B respectively. The bracket is fixedly connected to the moving carrier by bolts. The tension spring is used to eliminate or reduce the vibration of the coupling rotation fixing mechanism caused by the movement of the carrier.

[0008] Furthermore, the tension spring is made of stainless steel wire and is subjected to quenching and tempering treatment after manufacturing. The selection of the outer diameter of the tension spring wire and the outer diameter of the tension spring is obtained through vibration characteristic testing of the moving carrier, and generally 2mm and 12mm can be selected respectively.

[0009] The aforementioned coupling rotation fixing mechanism includes a connecting sleeve, an encoder, a connecting seat, an elastic coupling, and a connecting shaft support. One end of the connecting sleeve is fixed to the slide rod B of the elastic connecting rod, and the other end is connected to the encoder. The encoder is fixed to the connecting seat by bolts. The rotating shaft of the encoder is connected to the fixed connecting rod of the connecting shaft support by the elastic coupling. The base of the connecting shaft support is fixed to the wheel axle of the moving carrier by multiple sets of bolts. The connecting shaft support is connected to the connecting sleeve by two embedded rollers. The rollers ensure that the connecting sleeve does not rotate due to the rotation of the connecting shaft support. Through the connection of tension springs, the connecting sleeve can be kept relatively stationary and stable during movement.

[0010] Furthermore, the mobile carrier drives the connecting shaft support to rotate via the wheel axle, and then drives the encoder shaft to rotate together via the flexible coupling, thus ensuring that the rotation of the mobile carrier wheel and the encoder shaft are synchronized.

[0011] The data processing system includes a computer, a data acquisition card, a network cable, and data processing software. The encoder is connected to the data acquisition card via a three-core cable, and the data acquisition card is connected to the computer via a network cable. The data processing software is installed on the computer and is used to process the digital signals triggered by the encoder.

[0012] Furthermore, the three-core cable includes two power lines and one signal line. The pulse signal triggered by the encoder is transmitted to the data acquisition card via the three-core cable. The data acquisition card converts the pulse signal into a digital signal, which is then transmitted to the computer via the network cable for data processing software to process and analyze.

[0013] Furthermore, the data processing and analysis process of the software is as follows: the encoder shaft continuously emits pulse voltage signals as the wheels of the moving carrier rotate. By using the encoder's resolution F, the number of pulse voltage signals N, and the outer diameter D of the moving carrier's wheels, the distance L traveled by the moving carrier over a period of time can be calculated. The calculation formula is as follows:

[0014] L=DN / F (1)

[0015] Furthermore, based on the measured travel distance L of the mobile carrier and the set interval distance ΔL, a signal can be triggered. The formula for calculating the number of trigger signals C is as follows:

[0016] C=L%△L (2)

[0017] Trigger signals can be used for synchronous acquisition or response of other devices, can reduce the value of distance interval ΔL or linear nonlinear segmentation between two signals, and can significantly improve the signal trigger frequency.

[0018] The beneficial effects of this invention are:

[0019] (1) The present invention is a moving distance signal triggering device. By setting the tension spring, the interference of the automatic vibration of the moving carrier on the signal triggering device can be significantly reduced, thereby improving the stability and accuracy of the signal triggering.

[0020] (2) The present invention utilizes the pulse signal of the encoder to convert into a digital signal, and combines the encoder resolution, the wheel diameter of the moving carrier and the distance interval to trigger a specified signal, and can perform encrypted triggering;

[0021] (3) The present invention has a compact and reasonable structure, is easy to install, and has strong applicability. Attached Figure Description

[0022] Figure 1 This is a system composition diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the device structure of the present invention;

[0024] Figure 3 yes Figure 2 AA cross-sectional diagram;

[0025] Figure 4 This is a schematic diagram of the coupling rotation and fixing mechanism of the present invention.

[0026] In the diagram: 1-Slide rod A, 2-Bracket, 3-Bolt a, 4-Tension spring, 5-Bolt b, 6-Slide rod B, 7-Bolt c, 8-Bolt d, 9-Connecting sleeve, 10-Encoder, 11-Connecting seat, 12-Bolt e, 13-Flexible coupling, 14-Bolt f, 15-Bolt g, 16-Connecting shaft support, 17-Roller, 18-Moving carrier, 19-Wheel. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a vibration-adaptive movement distance signal triggering device consists of three parts: an elastic link, a coupling rotation and fixing mechanism, and a data processing system. The elastic link is connected to the coupling rotation and fixing mechanism, and both are fixed on the moving carrier. The encoder trigger signal in the coupling rotation and fixing mechanism is transmitted to the data processing system for signal processing via a data line.

[0029] The elastic connecting rod comprises a slide rod A1, a bracket 2, a tension spring 4, and a slide rod B6. The slide rod A1 and the bracket 2 are clamped and fixed by two bolts a3. The slide rod B6 is connected to the coupling rotation fixing mechanism by bolt d8. The two ends of the tension spring 4 are connected to the slide rod A1 and the slide rod B6 by bolts b5 respectively. The bracket 2 is fixedly connected to the moving carrier 18 by bolt c7. The tension spring 4 is used to eliminate or reduce the vibration of the coupling rotation fixing mechanism caused by the movement of the moving carrier 18.

[0030] Furthermore, the tension spring 4 is made of stainless steel wire and is subjected to quenching and tempering treatment after manufacturing. The selection of the outer diameter of the tension spring 4 wire and the outer diameter of the tension spring 4 is obtained through vibration characteristic test of the moving carrier, and generally 2mm and 12mm can be selected respectively.

[0031] The aforementioned coupling rotation fixing mechanism comprises a connecting sleeve 9, an encoder 10, a connecting seat 11, an elastic coupling 13, and a connecting shaft support 16. One end of the connecting sleeve 9 is fixed to the slide rod B6 of the elastic connecting rod, and the other end is connected to the encoder 10. The encoder 10 is fixed to the connecting seat 11 by bolt e12. The rotating shaft of the encoder 10 is connected to the fixing connecting rod of the connecting shaft support 16 by the elastic coupling 13. The base of the connecting shaft support 16 is fixed to the axle of the moving carrier by bolts f14 and g15. The connecting shaft support 16 is connected to the connecting sleeve 9 by two embedded rollers 17. The rollers 17 ensure that the connecting sleeve 9 does not rotate due to the rotation of the connecting shaft support 16. Through the connection of the tension spring 4, the connecting sleeve 9 can be kept relatively stationary and stable during movement.

[0032] Encoder 10 can be an Omron incremental photoelectric rotary encoder with an accuracy of 3600 points and a cumulative error of one-thousandth;

[0033] Furthermore, the mobile carrier drives the connecting shaft support 16 to rotate via the wheel axle, and then drives the encoder shaft 10 to rotate together via the flexible coupling 13, thus ensuring that the rotation of the mobile carrier wheel 19 is consistent with the rotation of the encoder shaft.

[0034] The flexible coupling 13 is a one-piece molded metal elastomer, usually made by wire cutting of a metal round bar. Commonly used materials include aluminum alloy, stainless steel, and engineering plastics. It is suitable for various deviations and precise torque transmission. The flexible coupling 13 contains an elastic compound of pre-compressed rubber to provide additional strength. NBK diaphragm type couplings can be selected.

[0035] The data processing system includes a computer, a data acquisition card, a network cable, and data processing software. The encoder 10 is connected to the data acquisition card via a three-core cable, and the data acquisition card is connected to the computer via a network cable. The data processing software is installed on the computer and is used to process the digital signals triggered by the encoder 10.

[0036] Furthermore, the three-core cable includes two power lines and one signal line. The pulse signal triggered by the encoder is transmitted to the data acquisition card via the three-core cable. The data acquisition card converts the pulse signal into a digital signal, which is then transmitted to the computer via the network cable for data processing software to process and analyze.

[0037] Furthermore, the data processing and analysis process of the software is as follows: As the encoder 10 shaft rotates with the wheels of the moving carrier, it continuously emits pulse voltage signals. By using the resolution F of the encoder 10, the number of pulse voltage signals N, and the outer diameter D of the wheels of the moving carrier, the travel distance L of the moving carrier over a period of time can be calculated. The calculation formula is as follows:

[0038] L=DN / F (1)

[0039] Furthermore, based on the measured travel distance L of the mobile carrier and the set interval distance ΔL, a signal can be triggered. The formula for calculating the number of trigger signals C is as follows:

[0040] C=L%△L (2)

[0041] Trigger signals can be used for synchronous acquisition or response of other devices, can reduce the value of distance interval ΔL or linear nonlinear segmentation between two signals, and can significantly improve the signal trigger frequency.

[0042] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection claimed by the claims of the present invention.

Claims

1. A vibration self-adapting detection car distance signal triggering device, characterized in that, The utility model relates to a kind of elastic connecting rod, shaft coupling rotation fixed mechanism and data processing system three parts are composed;Elastic connecting rod is connected with shaft coupling rotation fixed mechanism, and two are fixed on mobile carrier respectively, the elastic connecting rod includes slide A, support, tension spring, slide B, wherein slide A is fixed by two bolts with support, slide B is connected with shaft coupling rotation fixed mechanism by bolt hole, the both ends of tension spring are connected with slide A and slide B by bolt respectively, and support is fixedly connected with mobile carrier by bolt;Encoder trigger signal in shaft coupling rotation fixed mechanism is transmitted to data processing system for signal processing by data line, the shaft coupling rotation fixed mechanism includes connecting sleeve, encoder, connecting seat, elastic coupling, connecting axle support;Connecting sleeve one end is consolidated with the slide B of elastic connecting rod, the other end is connected with encoder, and encoder is fixed with connecting seat by bolt, and the rotating shaft of encoder is connected with the fixed connecting rod of connecting axle support by elastic coupling, and the base of connecting axle support is fixed with mobile carrier wheel axle by multiple bolts;Connecting axle support is connected with connecting sleeve by two embedded rollers.

2. A vibration self-adapting detection car distance signal triggering device according to claim 1, characterized in that, Mobile carrier drives connecting axle support to rotate by wheel axle, and then drives encoder shaft to rotate together by elastic coupling, and mobile carrier wheel rotation is consistent with encoder shaft rotation.

3. A vibration self-adapting detection car distance signal triggering device according to claim 1, characterized in that, The data processing system includes computer, data acquisition card, network cable and data processing software, encoder is connected with data acquisition card by three-core cable, data acquisition card is connected with computer by network cable, data processing software is installed in computer, and is used to process digital signal triggered by encoder.

4. A vibration self-adapting detection vehicle distance signal triggering device according to claim 3, characterized in that, The three-core cable includes 2-core power line, 1-core signal line, and pulse signal triggered by encoder is transmitted to data acquisition card by three-core cable, and data acquisition card converts pulse signal into digital signal, and then is transmitted to computer by network cable, for processing and analysis by data processing software.

5. A vibration self-adapting detection car distance signal triggering device according to claim 4, characterized in that, The processing and analysis process of the data processing software is as follows: encoder shaft rotates with mobile carrier wheel, and constantly sends out pulse voltage signal, and by the resolution F of encoder, the number N of pulse voltage signal and the outer diameter D of mobile carrier wheel, the distance L of mobile carrier in a period can be calculated, and the calculation formula is as follows: L=DN / F (1) Further, the distance L of mobile carrier obtained by measurement can trigger signal according to set interval distance △L, and the calculation formula of the number C of trigger signal is as follows: C=L%△L (2) Trigger signal can reduce the value of distance interval △L or linearly or nonlinearly divide two signals, and can significantly improve signal trigger frequency.

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