Fault diagnosis method and terminal for tunnel COVI monitoring device

Abstract

The invention discloses a fault diagnosis method and terminal for a tunnel COVI monitoring device, and the method comprises the steps: detecting and judging whether the communication between a target COVI detector and PLC equipment is normal or not, if yes, obtaining a CO optical path value and a VI optical path value of the target COVI detector through the PLC equipment, and if the CO optical path value and the VI optical path value are both greater than or equal to a first preset value, judging whether the communication between the target COVI detector and the PLC equipment is normal or not; if yes, CO analog quantity output and VI analog quantity output of the target COVI detector are obtained through the PLC equipment, whether the CO analog quantity output and the VI analog quantity output are both larger than a second preset value or not is judged, if yes and display data of the PLC equipment are abnormal, analog quantity output conversion verification is conducted on the PLC equipment, and if not, analog quantity output conversion verification is conducted on the PLC equipment. And if yes, displaying the CO integrated circuit unit and / or the VI integrated circuit unit which replaces the corresponding target COVI detector. According to the invention, the fault of the COVI detector can be conveniently and accurately diagnosed, and maintenance and repair work can be carried out in an auxiliary manner.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel safety, and in particular to a fault diagnosis method and terminal for a tunnel COVI monitoring device. Background Art

[0002] The tunnel COVI monitoring device, also known as the tunnel carbon monoxide (CO) and visibility (VI) detector, is used to effectively monitor the carbon monoxide concentration and visibility status in the tunnel around the clock. The PLC device samples the monitoring data and reports it to the monitoring system platform, so that the monitoring system platform can promptly start the fan for forced ventilation and take other corresponding measures to ensure tunnel air quality and the personal safety of vehicle drivers, passengers, and maintenance personnel passing through the tunnel.

[0003] According to the "Highway Tunnel Ventilation and Lighting Design Specification," tunnel COVI detectors should be installed on the tunnel roof or sidewall, generally at least three meters above the ground. The specific installation location depends on the tunnel's structure and ventilation requirements. During operation, COVI detectors are prone to malfunction. Failures can make it difficult for personnel to determine the true carbon monoxide concentration and visibility conditions within the tunnel, making it impossible to respond promptly and effectively to abnormal conditions, posing a threat to the safety of drivers, passengers, and maintenance personnel traveling through the tunnel. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to propose a fault diagnosis method and terminal for a tunnel COVI monitoring device, which can conveniently and accurately diagnose the fault of the COVI detector and assist in maintenance and repair work.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A fault diagnosis method for a tunnel COVI monitoring device comprises the following steps: S1, detecting and determining whether the communication between the target COVI detector and the PLC device is normal, if so, executing step S2; S2. Obtaining the CO optical path value and the VI optical path value of the target COVI detector through the PLC device. If both the CO optical path value and the VI optical path value are greater than or equal to a first preset value, executing step S3; S3. Obtain the CO analog output and VI analog output of the target COVI detector through the PLC device, and determine whether the CO analog output and the VI analog output are both greater than a second preset value. If so, and the display data of the PLC device is abnormal, perform analog output conversion verification on the PLC device. If not, display a message indicating that the CO integrated circuit unit and VI integrated circuit unit of the corresponding target COVI detector should be replaced.

[0006] In order to solve the above technical problems, another technical solution adopted by the present invention is: A fault diagnosis terminal for a tunnel COVI monitoring device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are implemented: S1, detecting and determining whether the communication between the target COVI detector and the PLC device is normal, if so, executing step S2; S2. Obtaining the CO optical path value and the VI optical path value of the target COVI detector through the PLC device. If both the CO optical path value and the VI optical path value are greater than or equal to a first preset value, executing step S3; S3. Obtain the CO analog output and VI analog output of the target COVI detector through the PLC device, and determine whether the CO analog output and the VI analog output are both greater than a second preset value. If so, and the display data of the PLC device is abnormal, perform analog output conversion verification on the PLC device. If not, display a message indicating that the CO integrated circuit unit and / or VI integrated circuit unit of the corresponding target COVI detector should be replaced.

[0007] The beneficial effects of the present invention are: providing a fault diagnosis method and terminal for a tunnel COVI monitoring device. When a fault is found in the tunnel COVI monitoring device, for example, no monitoring data is obtained from the PLC or the data is abnormal, the communication between the target COVI detector and the PLC device is first detected. When the communication line is normal, the optical path value of the target COVI detector is first verified through the communication function of the PLC device. After the optical path value is normal, the CO analog output and VI analog output of the target COVI detector are verified. Then, based on the verification result, the source of the fault is found, and the fault is checked layer by layer starting from the most basic communication line. The fault of the COVI detector can be diagnosed conveniently and accurately, and maintenance work can be assisted. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of the steps of a fault diagnosis method for a tunnel COVI monitoring device according to the present invention; Figure 2This is a system block diagram of a fault diagnosis terminal for a tunnel COVI monitoring device according to the present invention.

[0009] Description of labels: 1. A fault diagnosis terminal for a tunnel COVI monitoring device; 2. A memory; 3. A processor. DETAILED DESCRIPTION

[0010] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0011] Please refer to Figure 1 A fault diagnosis method for a tunnel COVI monitoring device comprises the following steps: S1, detecting and determining whether the communication between the target COVI detector and the PLC device is normal, if so, executing step S2; S2. Obtaining the CO optical path value and the VI optical path value of the target COVI detector through the PLC device. If both the CO optical path value and the VI optical path value are greater than or equal to a first preset value, executing step S3; S3. Obtain the CO analog output and VI analog output of the target COVI detector through the PLC device, and determine whether the CO analog output and the VI analog output are both greater than a second preset value. If so, and the display data of the PLC device is abnormal, perform analog output conversion verification on the PLC device. If not, display a message indicating that the CO integrated circuit unit and / or VI integrated circuit unit of the corresponding target COVI detector should be replaced.

[0012] From the above description, it can be seen that the beneficial effect of the present invention is that: when a fault is found in the tunnel COVI monitoring device, for example, no monitoring data is obtained from the PLC or the data is abnormal, the communication between the target COVI detector and the PLC device is first detected. When the communication line is normal, the optical path value of the target COVI detector is first verified through the communication function of the PLC device. After the optical path value is normal, the CO analog output and VI analog output of the target COVI detector are verified, and then the source of the fault is found based on the verification result. Starting from the most basic communication line, the fault is checked layer by layer, which can conveniently and accurately diagnose the fault of the COVI detector and assist in maintenance and repair work.

[0013] Furthermore, the step S1 specifically includes: Obtain the CO analog input and VI analog input sampled by the PLC device, compare the CO analog input with the CO analog output and the VI analog input with the VO analog output, and if the comparison results are consistent, execute step S2.

[0014] From the above description, it can be seen that when verifying whether the communication function is normal, it can be judged by obtaining the data received by the PLC device, the data sent by the target COVI detector, and comparing whether the two data are consistent. When the target COVI detector does not send data, the PLC device does not receive data, or the two data are inconsistent, the corresponding fault diagnosis conclusion can be drawn.

[0015] Furthermore, the step S2 further includes: If the CO optical path value is less than the first preset value, an instruction to adjust the mounting screws of the CO transceiver lens barrel is issued to the on-site operation and maintenance personnel; If the VI optical path value is less than the first preset value, an instruction to adjust the mounting screws of the VI transceiver lens barrel is sent to the on-site operation and maintenance personnel.

[0016] As can be seen from the above description, when either the CO optical path value or the VI optical path value is less than the first preset value, it indicates that the CO transceiver barrel or the VI transceiver barrel may not be aligned during installation, that is, an error has occurred in the data source, and a corresponding instruction is issued to ensure that the fault is promptly resolved.

[0017] Furthermore, the analog output conversion verification of the PLC device specifically includes: According to the CO analog output, calculate the ambient concentration C: C= ×(XK); Wherein, P represents the preset environmental concentration threshold, X represents the CO analog output, and K represents the first preset value; Calculate visibility V based on the analog output of the VI: ; Wherein, R represents the preset extinction coefficient threshold, and Y represents the VI analog output; The environmental concentration is compared with the display data, and the visibility is compared with the display data. If the comparison results are inconsistent, the PLC device is abnormal.

[0018] From the above description, it can be seen that when the target COVI detector can send data normally and the PLC device can receive data normally, by introducing relevant conversion expressions, it is possible to judge whether the calculation inside the device is correct based on the sent and received data, which helps to improve the convenience of fault diagnosis and improve efficiency.

[0019] Furthermore, the step S2 further includes: If the CO optical path value or the VI optical path value is less than the first preset value, the status indicator light of the target COVI detector is controlled to be red.

[0020] From the above description, it can be seen that when it is possible to preliminarily determine which part of the equipment has failed, especially the target COVI detector, its corresponding status indicator light will be changed to red to warn passing vehicles in the first time.

[0021] Please refer to Figure 2 A fault diagnosis terminal 1 for a tunnel COVI monitoring device includes a memory 2, a processor 3, and a computer program stored in the memory 2 and executable on the processor 3. When the processor 3 executes the computer program, the following steps are implemented: S1, detecting and determining whether the communication between the target COVI detector and the PLC device is normal, if so, executing step S2; S2. Obtaining the CO optical path value and the VI optical path value of the target COVI detector through the PLC device. If both the CO optical path value and the VI optical path value are greater than or equal to a first preset value, executing step S3; S3. Obtain the CO analog output and VI analog output of the target COVI detector through the PLC device, and determine whether the CO analog output and the VI analog output are both greater than a second preset value. If so, and the display data of the PLC device is abnormal, perform analog output conversion verification on the PLC device. If not, display a message indicating that the CO integrated circuit unit and / or VI integrated circuit unit of the corresponding target COVI detector should be replaced.

[0022] From the above description, it can be seen that the beneficial effect of the present invention is that: when a fault is found in the tunnel COVI monitoring device, for example, no monitoring data is obtained from the PLC or the data is abnormal, the communication between the target COVI detector and the PLC device is first detected. When the communication line is normal, the optical path value of the target COVI detector is first verified through the communication function of the PLC device. After the optical path value is normal, the CO analog output and VI analog output of the target COVI detector are verified, and then the source of the fault is found based on the verification result. Starting from the most basic communication line, the fault is checked layer by layer, which can conveniently and accurately diagnose the fault of the COVI detector and assist in maintenance and repair work.

[0023] Furthermore, the step S1 specifically includes: Obtain the CO analog input and VI analog input sampled by the PLC device, compare the CO analog input with the CO analog output and the VI analog input with the VO analog output, and if the comparison results are consistent, execute step S2.

[0024] From the above description, it can be seen that when verifying whether the communication function is normal, it can be judged by obtaining the data received by the PLC device, the data sent by the target COVI detector, and comparing whether the two data are consistent. When the target COVI detector does not send data, the PLC device does not receive data, or the two data are inconsistent, the corresponding fault diagnosis conclusion can be drawn.

[0025] Furthermore, the step S2 further includes: If the CO optical path value is less than the first preset value, an instruction to adjust the mounting screws of the CO transceiver lens barrel is issued to the on-site operation and maintenance personnel; If the VI optical path value is less than the first preset value, an instruction to adjust the mounting screws of the VI transceiver lens barrel is sent to the on-site operation and maintenance personnel.

[0026] As can be seen from the above description, when either the CO optical path value or the VI optical path value is less than the first preset value, it indicates that the CO transceiver barrel or the VI transceiver barrel may not be aligned during installation, that is, an error has occurred in the data source, and a corresponding instruction is issued to ensure that the fault is promptly resolved.

[0027] Furthermore, the analog output conversion verification of the PLC device specifically includes: According to the CO analog output, calculate the ambient concentration C: C= ×(XK); Wherein, P represents the preset environmental concentration threshold, X represents the CO analog output, and K represents the first preset value; Calculate visibility V based on the analog output of the VI: ; Wherein, R represents the preset extinction coefficient threshold, and Y represents the VI analog output; The environmental concentration is compared with the display data, and the visibility is compared with the display data. If the comparison results are inconsistent, the PLC device is abnormal.

[0028] From the above description, it can be seen that when the target COVI detector can send data normally and the PLC device can receive data normally, by introducing relevant conversion expressions, it is possible to judge whether the calculation inside the device is correct based on the sent and received data, which helps to improve the convenience of fault diagnosis and improve efficiency.

[0029] Furthermore, the step S2 further includes: If the CO optical path value or the VI optical path value is less than the first preset value, the status indicator light of the target COVI detector is controlled to be red.

[0030] From the above description, it can be seen that when it is possible to preliminarily determine which part of the equipment has failed, especially the target COVI detector, its corresponding status indicator light will be changed to red to warn passing vehicles in the first time.

[0031] Please refer to Figure 1 , embodiment 1 of the present invention is: A fault diagnosis method for a tunnel COVI monitoring device comprises the following steps: S1. Detect and determine whether the communication between the target COVI detector and the PLC device is normal. If so, proceed to step S2. In this embodiment, step S1 specifically includes: obtaining the CO analog input and VI analog input sampled by the PLC device, comparing the CO analog input and CO analog output as well as the VI analog input and VO analog output respectively; if the comparison results are consistent, executing step S2.

[0032] S2. Obtain the CO optical path value and the VI optical path value of the target COVI detector through the PLC device. If the CO optical path value and the VI optical path value are both greater than or equal to a first preset value, execute step S3. If the CO optical path value is less than the first preset value, issue an instruction to adjust the mounting screws of the CO transceiver barrel to the on-site operation and maintenance personnel. If the VI optical path value is less than the first preset value, issue an instruction to adjust the mounting screws of the VI transceiver barrel to the on-site operation and maintenance personnel.

[0033] In addition, if no current is measured at the PLC device end, the output end of the COVI detector should be measured to see if there is current output; if there is current output, it may be judged that the line from the equipment to the PLC end is damaged. The PLC end line can be short-circuited and the multimeter can be used to determine which specific line is damaged and inform the on-off position of the on-site personnel; if there is no current output at the equipment end, the "power" plug No. 1 and No. 2 ports should be measured to see if there is 220V power supply, and the "analog" plug No. 1 and No. 2 ports should be measured to see if there is 220V AC voltage, so as to prevent the construction party from connecting the "power" and "analog" plug wires reversely.

[0034] In this embodiment, the CO transceiver, which includes a transmitting lens and a receiving lens, is used as an example. During installation, to adjust the COVI optical path of the target COVI detector, first adjust the four mounting screws on the transmitting end so that the red light from the transmitting lens aligns with the dust shield on the receiving end. Then, adjust the four mounting screws on the receiving lens to complete the optical path adjustment. The optical path value represents the optical path formed by the infrared light emitted from the transmitting lens, reflected by the reflector, and then reaching the receiving lens after the CO transceiver is installed. Therefore, the first preset value is a theoretical value determined based on the actual position of the target COVI detector in the tunnel. The same applies to the VI optical path value and is not further explained.

[0035] When the CO optical path value or the VI optical path value is less than the first preset value, the status indicator light of the target COVI detector is controlled to be red to indicate that the device is faulty.

[0036] S3. Obtain the CO analog output and VI analog output of the target COVI detector through the PLC device, and determine whether the CO analog output and VI analog output are both greater than a second preset value. If so and the display data of the PLC device is abnormal, perform analog output conversion verification on the PLC device. If not, display a message indicating that the CO integrated circuit unit and / or VI integrated circuit unit of the corresponding target COVI detector should be replaced.

[0037] In this embodiment, performing analog output conversion verification on the PLC device specifically includes: Calculate the ambient concentration C based on the CO analog output: C= ×(XK); Wherein, P represents the preset environmental concentration threshold, X represents the CO analog output, and K represents the first preset value; Calculate visibility V based on VI analog output: ; Where R represents the preset extinction coefficient threshold, and Y represents the VI analog output; Compare the ambient concentration with the displayed data and the visibility with the displayed data respectively. If any comparison result is inconsistent, the PLC device is abnormal.

[0038] In this embodiment, the second preset value is selected based on the actual parameters of the target COVI detector, generally 4-20mA. At the same time, corresponding environmental concentration conversion formulas and visibility conversion formulas are formed based on the CO analog output and the VI analog output, respectively, which are used as the internal conversion logic of the PLC device and used to verify whether its conversion is normal. Among them, corresponding to the 4-20mA CO analog output, the preset environmental concentration threshold is generally 0-300ppm, and corresponding to the 4-20mA VI analog output, the preset extinction coefficient threshold is 0-250010 -5 m -1 .

[0039] Please refer to Figure 2 , the second embodiment of the present invention is: A fault diagnosis terminal 1 for a tunnel COVI monitoring device includes a memory 2, a processor 3, and a computer program stored in the memory 2 and executable on the processor 3. When the processor 3 executes the computer program, a fault diagnosis method for a tunnel COVI monitoring device according to the first embodiment is implemented. In summary, the present invention provides a fault diagnosis method and terminal for a tunnel COVI monitoring device. When a fault is found in the tunnel COVI monitoring device, for example, no monitoring data is obtained from the PLC or the data is abnormal, the communication between the target COVI detector and the PLC device is first detected. When the communication line is normal, the optical path value of the target COVI detector is first verified through the communication function of the PLC device. After the optical path value is normal, the CO analog output and VI analog output of the target COVI detector are verified. Then, based on the verification result, the source of the fault is found, and the fault is checked layer by layer starting from the most basic communication line. The fault of the COVI detector can be diagnosed conveniently and accurately, and the maintenance work can be assisted.

[0040] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fault diagnosis method for a tunnel COVI monitoring device, characterized in that: The steps include: S1, detecting and determining whether the communication between the target COVI detector and the PLC device is normal, if so, executing step S2; S2. Obtaining the CO optical path value and the VI optical path value of the target COVI detector through the PLC device. If both the CO optical path value and the VI optical path value are greater than or equal to a first preset value, executing step S3; S3. Obtain the CO analog output and VI analog output of the target COVI detector through the PLC device, and determine whether the CO analog output and the VI analog output are both greater than a second preset value. If so, and the display data of the PLC device is abnormal, perform analog output conversion verification on the PLC device. If not, display a message indicating that the CO integrated circuit unit and / or VI integrated circuit unit of the corresponding target COVI detector should be replaced.

2. The fault diagnosis method of a tunnel COVI monitoring device according to claim 1, characterized in that: The step S1 specifically includes: Obtain the CO analog input and VI analog input sampled by the PLC device, compare the CO analog input with the CO analog output and the VI analog input with the VO analog output, and if the comparison results are consistent, execute step S2.

3. The fault diagnosis method of a tunnel COVI monitoring device according to claim 1, characterized in that: The step S2 further includes: If the CO optical path value is less than the first preset value, an instruction to adjust the mounting screws of the CO transceiver lens barrel is issued to the on-site operation and maintenance personnel; If the VI optical path value is less than the first preset value, an instruction to adjust the mounting screws of the VI transceiver lens barrel is sent to the on-site operation and maintenance personnel.

4. The fault diagnosis method of a tunnel COVI monitoring device according to claim 1, characterized in that: The analog output conversion verification of the PLC device specifically includes: According to the CO analog output, calculate the ambient concentration C: C= ×(X-K); Wherein, P represents the preset environmental concentration threshold, X represents the CO analog output, and K represents the first preset value; Calculate visibility V based on the analog output of the VI: ; Wherein, R represents the preset extinction coefficient threshold, and Y represents the VI analog output; The environmental concentration is compared with the display data, and the visibility is compared with the display data. If the comparison results are inconsistent, the PLC device is abnormal.

5. The fault diagnosis method of a tunnel COVI monitoring device according to claim 1, characterized in that: The step S2 further includes: If the CO optical path value or the VI optical path value is less than the first preset value, the status indicator light of the target COVI detector is controlled to be red.

6. A fault diagnosis terminal for a tunnel COVI monitoring device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the following steps are implemented: S1, detecting and determining whether the communication between the target COVI detector and the PLC device is normal, if so, executing step S2; S2. Obtaining the CO optical path value and the VI optical path value of the target COVI detector through the PLC device. If both the CO optical path value and the VI optical path value are greater than or equal to a first preset value, executing step S3; S3. Obtain the CO analog output and VI analog output of the target COVI detector through the PLC device, and determine whether the CO analog output and the VI analog output are both greater than a second preset value. If so, and the display data of the PLC device is abnormal, perform analog output conversion verification on the PLC device. If not, display a message indicating that the CO integrated circuit unit and / or VI integrated circuit unit of the corresponding target COVI detector should be replaced.

7. A fault diagnosis terminal for a tunnel COVI monitoring device according to claim 6, characterized in that: The step S1 specifically includes: Obtain the CO analog input and VI analog input sampled by the PLC device, compare the CO analog input with the CO analog output and the VI analog input with the VO analog output, and if the comparison results are consistent, execute step S2.

8. The fault diagnosis terminal of a tunnel COVI monitoring device according to claim 6, characterized in that: The step S2 further includes: If the CO optical path value is less than the first preset value, an instruction to adjust the mounting screws of the CO transceiver lens barrel is issued to the on-site operation and maintenance personnel; If the VI optical path value is less than the first preset value, an instruction to adjust the mounting screws of the VI transceiver lens barrel is sent to the on-site operation and maintenance personnel.

9. The fault diagnosis terminal of a tunnel COVI monitoring device according to claim 6, characterized in that: The analog output conversion verification of the PLC device specifically includes: According to the CO analog output, calculate the ambient concentration C: C= ×(X-K); Wherein, P represents the preset environmental concentration threshold, X represents the CO analog output, and K represents the first preset value; Calculate visibility V based on the analog output of the VI: ; Wherein, R represents the preset extinction coefficient threshold, and Y represents the VI analog output; The environmental concentration is compared with the display data, and the visibility is compared with the display data. If the comparison results are inconsistent, the PLC device is abnormal.

10. The fault diagnosis terminal of a tunnel COVI monitoring device according to claim 6, characterized in that: The step S2 further includes: If the CO optical path value or the VI optical path value is less than the first preset value, the status indicator light of the target COVI detector is controlled to be red.

Images