A method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication
By adopting a combination of one-send and one-receive mechanism and GPRS communication module on the rail, the integration of ultrasonic waveguide detection and communication is achieved, solving the high communication cost problem of the rail break detection system, and improving the reliability and safety of the system .
Patent Information
- Application Number
- CN202211154465.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-09-21
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2042-09-21
AI Technical Summary
The high communication cost of existing rail break detection systems limits the system's large-scale application, especially when there is no GPRS signal in the tunnel environment, data needs to be transmitted through the wireless digital transmission module, resulting in cost and reliability problems.
The receiving nodes and transmitting nodes of ultrasonic guides are arranged on two rails by using a one-send and one-receive mechanism. The ultrasonic guide signal loading data is used to realize the integration of detection and communication, and the detection information is transmitted at the end node using the GPRS communication module, and the ultrasonic guide is used to transmit detection information. The transmission channel of the wave signal performs relay transmission, reducing communication costs.
It effectively reduces communication costs, improves the reliability of the rail break detection system, and ensures the safety of train operation.
Smart Images
Figure CN115684343B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of nondestructive testing and relates to a method for integrating long-distance rail piezoelectric ultrasonic guided wave testing and ultrasonic guided wave communication. Background Art
[0002] Railways in my country undertake the important tasks of personnel and freight transportation, and are one of the important means of transportation for people to travel. At present, high-speed railways have led the world as a landmark achievement of my country's independent innovation. Among them, seamless lines are lines where long rails with no rail seams and their complex lower structures adapt to thermal expansion and contraction and maintain strength and stability. At the same time, the carrying capacity and transportation speed of railway transportation have been greatly improved, which poses a greater test to the safety of the components of the railway system. As the basis for train operation, the track is the part that directly bears various loads of locomotives and vehicles. If a broken track occurs on the railway operating line, it will seriously threaten the driving safety of the train and even cause major safety accidents such as train derailment and overturning. Therefore, in order to ensure the driving safety of the train, it is of great significance to monitor and evaluate the structural health of the rails.
[0003] In recent years, ultrasonic guided wave technology has been widely used in the field of non-destructive testing due to its advantages such as single-point excitation, long-distance detection, full-section coverage, high efficiency and low cost. The non-destructive testing technology based on ultrasonic guided waves can realize real-time online monitoring of the health of rail structures by using only piezoelectric ultrasonic transducers that can be used for a long time after a single installation and a regular detection data collection system. In order to monitor the health of rail structures in real time online, researchers have developed a real-time detection system for broken rails based on ultrasonic guided waves, but the data transmission of existing detection systems mainly relies on 3G or 4G wireless communication modules. In addition, since there is no GPRS signal in the tunnel, a wireless data transmission module needs to be used to realize data transmission through relay. Therefore, this will lead to high communication costs when the system is applied on a large scale, which seriously restricts the large-scale application of the system. Of course, the emerging Internet of Things communication NB-IOT and 5G communication technologies can meet the needs of data transmission of the monitoring system, but they are also limited by the application cost. Summary of the invention
[0004] The purpose of the present invention is to provide a method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication, so as to achieve effective detection of rail status while reducing communication costs.
[0005] The technical solution adopted by the present invention is a method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication. Specifically, based on a one-transmit-one-receive mechanism, ultrasonic guided wave receiving nodes and transmitting nodes are arranged on two rails, and the receiving nodes of the end nodes are equipped with communication modules to complete the formulation of the detection node layout plan. Based on the detection node layout plan, a synchronization mechanism for ultrasonic guided wave detection and ultrasonic guided wave communication is constructed, and the data information to be transmitted is loaded into the ultrasonic guided wave signal used for detection for transmission, thereby realizing the integration of ultrasonic guided wave detection and ultrasonic guided wave communication.
[0006] The present invention is also characterized in that:
[0007] Follow the steps below to implement it:
[0008] Step 1: Formulate a rail detection node layout plan based on a one-transmit-one-receive mechanism. The detection node includes a transmitting node and a receiving node. The receiving node at the end node is equipped with a communication module.
[0009] Step 2: Each transmitting node is set with a different delay time, so that the transmitting node transmits the ultrasonic guided wave signal according to the delay time. The detection system realizes the synchronous transmission of detection information while detecting. The transmitting node of each rail works alternately in order, and the synchronization mechanism of ultrasonic guided wave detection and ultrasonic guided wave communication is completed.
[0010] Step 3: Load the rail detection information into the detected ultrasonic guided wave signal, use the rail as the transmission channel, and transmit the rail detection information to the end node by relay. Finally, the communication module at the end node transmits the rail detection information to the remote server.
[0011] When the rail passes through a tunnel, the receiving node at the end node on the rail is set outside the tunnel to ensure that the communication equipment connected to the receiving node works normally.
[0012] The specific arrangement scheme of the rail detection nodes is that the transmitting nodes and receiving nodes of the two rails are alternately arranged at equal intervals, one rail is arranged in the order of receiving node-transmitting node-receiving node-transmitting node..., and the other rail is arranged in the order of transmitting node-receiving node-transmitting node-receiving node...
[0013] The interval between two adjacent detection nodes is 1 km.
[0014] The communication module is a GPRS communication module, and the receiving node located at the end node is connected to the GPRS communication module.
[0015] The beneficial effects of the present invention are:
[0016] The present invention discloses a method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication, which can effectively reduce the communication cost of the existing detection system and realize the transmission of detection information during detection, thereby improving the reliability of the ultrasonic guided wave broken rail detection system and effectively ensuring the operation safety of the train. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a detection node arrangement scheme of a long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication fusion method of the present invention;
[0018] Figure 2 It is a schematic diagram of ultrasonic guided wave detection and communication fusion transmission under a 5-detection node configuration of a long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication fusion method of the present invention.
[0019] Figure 3 The invention discloses an ultrasonic guided wave detection synchronization flow chart of a method for integrating long-distance rail piezoelectric ultrasonic guided wave detection with ultrasonic guided wave communication. DETAILED DESCRIPTION
[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
[0021] Example
[0022] This embodiment provides a method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication. Based on a one-transmit-one-receive mechanism, ultrasonic guided wave receiving nodes and transmitting nodes are arranged on two rails. The receiving node of the end node is equipped with a communication module, such as Figure 1 As shown, the formulation of the detection node layout plan is completed, and the synchronization mechanism of ultrasonic guided wave detection and ultrasonic guided wave communication is constructed based on the detection node layout plan. The data information to be transmitted is loaded into the ultrasonic guided wave signal used for detection for transmission, thereby realizing the fusion of ultrasonic guided wave detection and ultrasonic guided wave communication.
[0023] Follow the steps below to implement it:
[0024] Step 1: Formulate a rail detection node layout plan based on a one-transmit-one-receive mechanism. The detection node includes a transmitting node and a receiving node. The receiving node at the end node is equipped with a communication module.
[0025] An ultrasonic guided wave transmitting node is used to transmit an ultrasonic guided wave signal. The ultrasonic guided wave transmitting node includes an ultrasonic guided wave transmitting control circuit a and a communication interface circuit a connected together. The ultrasonic guided wave transmitting control circuit a is connected to a sandwich piezoelectric ultrasonic transducer a. The piezoelectric ultrasonic transducer a is fixed to the rail to be detected. The communication interface circuit a is connected to an RS232 communication module a. The RS232 communication module a is used for data communication between a transmitting node and a receiving node at the same position.
[0026] An ultrasonic guided wave receiving node is used to receive ultrasonic guided wave signals. The ultrasonic guided wave receiving node includes an ultrasonic guided wave signal processing circuit b and a communication interface circuit b connected together. The ultrasonic guided wave signal processing circuit b is connected to a sandwich piezoelectric ultrasonic transducer b. The piezoelectric ultrasonic transducer b is fixed to the rail to be detected. The communication interface circuit b is connected to an RS232 communication module b. The RS232 communication module b is used for data communication between a transmitting node and a receiving node at the same position.
[0027] The specific arrangement scheme of rail detection nodes is that the transmitting nodes and receiving nodes of the two rails are alternately arranged at equal intervals of 1 km, such as Figure 2 As shown, each rail is provided with 5 detection nodes, and the receiving nodes at the end nodes are arranged outside the tunnel, wherein one rail is arranged in the order of receiving node R1 (end node) - transmitting node E2 - receiving node R3 - transmitting node E4 - receiving node R5 (end node), and the other rail is arranged in the order of transmitting node E1 (end node) - receiving node R2 - transmitting node E3 - receiving node R4 - transmitting node E5 (end node), and the receiving nodes R1 and R5 located outside the tunnel are end nodes, which are equipped with GPRS communication modules (the receiving nodes R1 and R5 are respectively connected to the GPRS communication modules), and the receiving nodes R2, R3 and R4 and the transmitting nodes E2, E3 and E4 are all located in the tunnel;
[0028] Step 2: Each transmitting node is set with a different delay time, so that the transmitting node transmits the ultrasonic guided wave signal according to the delay time. The detection system realizes the synchronous transmission of detection information while detecting. The transmitting node of each rail works alternately in order, and the synchronization mechanism of ultrasonic guided wave detection and ultrasonic guided wave communication is completed.
[0029] Step 2.1, setting the delay Td=0s for the transmitting node E1, and starting to transmit the ultrasonic guided wave signal;
[0030] Step 2.2, setting the delay Td=1s for the transmitting node E2, and starting to transmit the ultrasonic guided wave signal;
[0031] Step 2.3, for the transmitting nodes E1 and E3, the delays Td=0s and Td=2s are set respectively, and the transmitting nodes E1 and E3 start to transmit ultrasonic guided wave signals;
[0032] Step 2.4, for the transmitting nodes E2 and E4, the delays Td=1s and Td=3s are set respectively, and the transmitting nodes E2 and E4 start to transmit ultrasonic guided wave signals;
[0033] Step 2.5, for the transmitting nodes E1, E3 and E5, the delays Td=0s, Td=2s and Td=4s are set respectively, and the transmitting nodes E1, E3 and E5 start to transmit ultrasonic guided wave signals;
[0034] Step 2.6, for the transmitting nodes E2 and E4, the delays Td=1s and Td=3s are set respectively, and the transmitting nodes E2 and E4 start to transmit ultrasonic guided wave signals;
[0035] Step 2.7, for the transmitting nodes E1, E3 and E5, the delays Td=0s, Td=2s and Td=4s are set respectively, and the transmitting nodes E1, E3 and E5 start to transmit ultrasonic guided wave signals;
[0036] Step 2.8: Figure 3 As shown in the figure, R ij (i=1,2,3,4,5;j=1,2,3,4,5) indicates the reception of ultrasonic guided wave signal by receiving node R j Received from the transmitting node E i The characteristic ultrasonic guided wave signal emitted, after the emission node has gone through the above steps 2.1-2.7, realizes the synchronous transmission of the detection information while detecting, and then, the emission nodes on one rail work alternately in the order of E2-E4, and the emission nodes on the other rail work alternately in the order of E1-E3-E5;
[0037] Step 3: Load the rail detection information into the detected ultrasonic guided wave signal, use the rail as the transmission channel, and transmit the rail detection information to the end node by relay. Finally, the GPRS communication module at the end node transmits the rail detection information to the remote server.
Claims
1. A method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication, characterized in that: Specifically, based on the one-transmit-one-receive mechanism, ultrasonic guided wave receiving nodes and transmitting nodes are arranged on the two rails, and the receiving nodes of the end nodes are equipped with communication modules to complete the formulation of the detection node layout plan. Based on the detection node layout plan, a synchronization mechanism for ultrasonic guided wave detection and ultrasonic guided wave communication is constructed, and the data information to be transmitted is loaded into the ultrasonic guided wave signal used for detection for transmission, that is, the integration of ultrasonic guided wave detection and ultrasonic guided wave communication is realized; Follow the steps below to implement it: Step 1: Based on the one-transmit-one-receive mechanism, a rail detection node layout plan is formulated, and the receiving node of the end node is equipped with a communication module; The rail detection node arrangement scheme is specifically as follows: the transmitting nodes and receiving nodes of the two rails are alternately arranged at equal intervals, wherein one rail is arranged in the order of receiving node-transmitting node-receiving node-transmitting node..., and the other rail is arranged in the order of transmitting node-receiving node-transmitting node-receiving node...; Step 2: Each transmitting node is set with a different delay time, so that the transmitting node transmits the ultrasonic guided wave signal according to the delay time. The detection system realizes the synchronous transmission of detection information while detecting. The transmitting node of each rail works alternately in order, and the synchronization mechanism of ultrasonic guided wave detection and ultrasonic guided wave communication is completed. Step 3: Load the rail detection information into the detected ultrasonic guided wave signal, use the rail as the transmission channel, and transmit the rail detection information to the end node by relay. Finally, the communication module at the end node transmits the rail detection information to the remote server.
2. The method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication according to claim 1 is characterized in that: When the rail passes through a tunnel, the receiving node at the end node on the rail is set outside the tunnel to ensure that the communication equipment connected to the receiving node works normally.
3. The method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication according to claim 1 is characterized in that: The detection nodes are spaced 1 km apart.
4. The method for integrating long-distance rail piezoelectric ultrasonic guided wave detection and ultrasonic guided wave communication according to claim 1 is characterized in that: The communication module is a GPRS communication module, and the receiving node of the end node is connected to the GPRS communication module.