Portable turnout diagnostic equipment

Abstract

The invention discloses portable turnout diagnostic equipment, and belongs to the technical field of track turnout fault diagnosis. The device comprises a packaged device shell, the front side of the device shell is provided with a liquid crystal display screen, the side face of the device shell is provided with an acquisition line bank and a power line interface, a circuit board is arranged in the device shell, and the circuit board comprises an acquisition part, a digital-to-analog conversion part, a logic judgment part and a display part; the acquisition part is used for generating stable direct current signals; the digital-to-analog conversion part is used for converting the collected analog signal into an eight-bit binary signal; and the logic judgment part is used for receiving and processing the digital signal and outputting a display signal after a result is obtained. According to the invention, the result can be directly read, the efficiency is higher, only voltage value judgment is adopted, the data conflict is less, the accuracy is higher, the fault judgment habit is better met, the whole equipment is small in size and low in cost, and the device can be installed in a combined cabinet to detect the turnout state in real time.

Description

Technical Field

[0001] The invention relates to the technical field of rail turnout fault diagnosis, in particular to a portable turnout diagnostic device. Background Art

[0002] The urban rail transit signal control system adopts mature and reliable control and transmission technology, with computer technology as the core, and turnouts, signal machines and other equipment as the main control means to control train operation. As one of the three basic components of the signal system, the state of the turnout will directly affect driving safety and operational efficiency, and it is particularly important to ensure the healthy and stable operation of the equipment. The base of turnout equipment is constantly expanding. Once the turnout fails and affects the train turnaround, it will cause a large number of train delays. Therefore, it is necessary to conduct targeted research on the prevention and treatment of turnout failures, and use special equipment for prevention and auxiliary repairs.

[0003] ① The existing microcomputer monitoring equipment detects the switch gap and current, and mainly monitors the indicators of the switch operation status. There is no separate fault diagnosis module, and it cannot directly determine the inside and outside of the fault room and the exact point. In addition, the microcomputer monitoring information needs to be viewed on the display. The display and the switch equipment cabinet are not in the same place, and the repair personnel cannot check the fault while viewing the microcomputer monitoring information.

[0004] ② At present, more than 9,000 kilometers of subways have been built and opened to traffic nationwide, and the base of turnout equipment is constantly expanding, with an average of one set of turnouts per 1 km. Once a turnout fails, it will affect the train turnaround and cause a large number of train delays. Therefore, it is necessary to conduct targeted research on the prevention and treatment of turnout failures, and use special equipment for prevention and auxiliary repairs.

[0005] ③After a turnout failure occurs, only personnel can carry out emergency repairs. Personnel who can repair turnout failures need at least 3 years of work experience and high psychological quality to deal with emergencies. If new employees or employees with poor emergency response capabilities do not handle it properly, it is easy to cause more serious consequences such as the expansion of the fault. However, if it is a special equipment, it will not be affected by these factors, and the response will be faster, saving repair time and reducing risks.

[0006] ④ There is no precedent for the development of such equipment in the industry, and there is no reference. The 380V voltage is high for general sensors and requires suitable sensors. Integrate sensors, processing equipment, and display equipment together, and at the same time require a smaller volume. There are many types of fault sites and many experimental scenarios, and the amount of data that needs to be processed is relatively large. Summary of the invention

[0007] The object of the present invention is to provide a portable turnout diagnostic device for improving fault diagnosis efficiency, so as to solve the problems raised by the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: A portable turnout diagnostic device comprises a packaged device shell, a liquid crystal display screen is arranged on the front of the device shell, a collection line row and a power line interface are arranged on the side of the device shell, and a circuit board is arranged inside the device shell, and the circuit board comprises a collection part, a digital-to-analog conversion part, a logic judgment part and a display part; the collection part converts a 400V power supply into a 2mA current signal through a voltage coupler, and converts it into a DC signal using a rectifier bridge, and generates a stable DC signal after voltage stabilization by a capacitor and a coil; the digital-to-analog conversion part converts the collected analog signal into a usable eight-bit binary signal using an ADC conversion chip U2; the logic judgment part adopts an 89C51 central processing chip U1, receives and processes digital signals through C language programming, judges the processed data, and outputs a display signal after obtaining the result; the display part is a corresponding liquid crystal display screen.

[0009] Furthermore, the acquisition part includes an AC input terminal, a current limiting resistor, a voltage transformer, a bridge rectifier, a capacitor and a coil inductor. The AC input terminal is used to connect to the power line interface. The AC power of the power line interface is input through the AC input terminal, enters the voltage transformer, and 1:1 output enters the bridge rectifier to convert the sinusoidal alternating current into fluctuating DC power, which is converted into DC power with a relatively stable voltage after capacitor compensation. Finally, after the current is filtered by the coil inductor, it is converted into a stable DC power output to the AD conversion chip of the digital-to-analog conversion part to convert it into a digital signal.

[0010] Furthermore, the XTAL1 and XTAL2 pins of the central processing chip U1 are connected to a 12MHz crystal oscillator to provide a clock for the entire device, the RST pin is connected to a reset circuit, the P0.0-P0.7 pins are connected to an LCD1602 liquid crystal screen, the D0-D7 display data pins, the P1.0-P1.7 pins are connected to the D0-D7 pins of the ADC conversion chip U2 to receive an 8-bit output signal, the ALE / PROG pin is connected to the CLK pin of the ADC conversion chip U2 to provide a clock signal for the chip, the P2.7 pin is connected to the START pin of the ADC conversion chip U2 to control the start of AD conversion, and the P2.6 pin is connected to the ALE of the ADC conversion chip U2 to control the read Get the address latch, P2.3-P2.5 pins are respectively connected to the RS, RW, and E pins of the LCD1602 liquid crystal screen to control the read and write status of the liquid crystal display, P2.0-P2.2 are respectively connected to the ADDA-ADDC pins of the ADC conversion chip U2 to control the port for reading analog signals, P3.2 pin is connected to the EOC pin of the ADC conversion chip U2 to control the end of AD conversion, P3.3 pin is connected to the OE pin of the ADC conversion chip U2 to control the output of the converted digital signal to the central processing chip U1, In0-In3 of the ADC conversion chip U2 is responsible for receiving the input analog voltage signal, and the rest are power supply pins and ground pins.

[0011] Furthermore, the following usage method is also included: the acquisition line row includes five connecting wires, and the five connecting wires are connected to the X1, X2, X3, X4, and X5 points of the switch circuit according to the identification line sequence, and the voltage values ​​measured by the equipment are the logical voltage values ​​of X1 and X2, X3, X4, and X5.

[0012] Furthermore, the current equipment status can be diagnosed through voltage value, including positioning indication, reverse position indication and meter loss. If the switch meter loss is caused by a breakpoint, the system will immediately make a judgment and display diagnostic information, indicating which outdoor line has a breakpoint or a breakpoint occurs indoors. Repair personnel can directly find the breakpoint based on the breakpoint information.

[0013] Furthermore, the access points of the five connecting wires are located at the indoor cabinet distribution board, which is used to distinguish the direct points of indoor and outdoor circuits, so that corresponding fault judgment can be made when a fault occurs.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The portable turnout diagnostic equipment of the present invention has high efficiency in troubleshooting. Manual use of a voltmeter to determine a fault requires a single measurement of the line voltage to distinguish between indoor and outdoor and specific fault lines. The equipment can directly read the result, which can save more than 60% of time. If the normal installation method is adopted, the result can be displayed when the meter is lost, which is more efficient.

[0015] 2. The portable turnout diagnostic equipment of the present invention has a high accuracy rate. In actual troubleshooting, the technical level and status of personnel are often the key factors affecting the results, but this equipment does not have such concerns. Compared with the existing microcomputer monitoring system, this equipment only uses voltage value judgment, with fewer data conflicts and fewer bugs, and a higher accuracy rate.

[0016] 3. The portable turnout diagnostic equipment of the present invention is more in line with the fault judgment habits. The fault judgment algorithm is summarized by a number of senior turnout professionals. Compared with microcomputer monitoring, it is more intuitive and more in line with the usage habits of professionals.

[0017] 4. The portable turnout diagnostic equipment of the present invention is highly portable and low in cost. The equipment is small in size and low in cost. It can be installed in a combination cabinet to detect the turnout status in real time, and can also be used when needed. At the same time, a variety of power supply methods can be selected, and it can be powered by batteries or fixed power supplies. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the device structure of the present invention; Figure 2 It is a side view of the device structure of the present invention; Figure 3 It is a top view of the structure of the device of the present invention; Figure 4 Collect part of the circuit diagram for the present invention; Figure 5 This is the circuit diagram of the central processing chip U1 of the present invention; Figure 6 This is the circuit diagram of the ADC conversion chip U2 of the present invention; Figure 7 This is a circuit diagram of a liquid crystal display screen of the present invention.

[0019] In the figure: 1. AC input terminal; 2. Current limiting resistor; 3. Voltage transformer; 4. Bridge rectifier; 5. Capacitor; 6. Coil inductor; 7. Collection line row; 8. Power cord interface; 9. LCD display. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-3A portable turnout diagnostic device is provided in an embodiment of the present invention, including a packaged device housing, a liquid crystal display screen 9 is provided on the front of the device housing, and a collection line row 7 and a power line interface 8 are provided on the side of the device housing. When the device is used, the five wires on the collection line row 7 are respectively connected to X1-X5 of the turnout circuit in a fixed order. The access point is located at the indoor cabinet distribution board, which is the most direct point to distinguish between indoor and outdoor circuits. When a fault occurs, the corresponding fault judgment can be performed.

[0022] A circuit board is provided inside the housing of the device in the embodiment of the present invention, and the circuit board includes an acquisition part, a digital-to-analog conversion part, a logic judgment part and a display part; wherein the acquisition part converts a 400v power supply into a 2mA current signal through a voltage coupler, and converts it into a DC signal using a rectifier bridge, and generates a stable DC signal after voltage stabilization by capacitors and coils; the digital-to-analog conversion part uses an ADC conversion chip U2 to convert the collected analog signal into a usable eight-bit binary signal; the logic judgment part uses an 89C51 central processing chip U1, receives and processes digital signals through C language programming, judges the processed data, and outputs a display signal after obtaining the result; the display part is a corresponding liquid crystal display screen 9, which is energy-saving, clear, highly stable and small in size; specifically, the present invention uses logical operations to replace manual on-site judgment, and simultaneously collects the voltage values ​​of X1, X2, X3, X4, and X5. When an abnormality occurs, the range of the fault point can be quickly and accurately judged through the logic operation of the single-chip microcomputer.

[0023] like Figure 4 As shown, the acquisition part in the embodiment of the present invention includes an AC input terminal 1, a current limiting resistor 2, a voltage transformer 3, a bridge rectifier 4, a capacitor 5 and a coil inductor 6. The AC input terminal 1 is used to connect to the power line interface 8. The AC power of the power line interface 8 is input through the AC input terminal 1, enters the voltage transformer 3, and 1:1 output enters the bridge rectifier 4 to convert the sinusoidal alternating current into fluctuating DC power, which is converted into DC power with a relatively stable voltage after compensation by the capacitor 5. Finally, the current is filtered by the coil inductor 6 and converted into a stable DC power output to the AD conversion chip of the digital-to-analog conversion part to convert it into a digital signal.

[0024] See also Figure 5-7In the embodiment of the present invention, the XTAL1 and XTAL2 pins of the central processing chip U1 are connected to a 12MHz crystal oscillator to provide a clock for the entire device, the RST pin is connected to a reset circuit, the P0.0-P0.7 pins are connected to an LCD1602 liquid crystal screen, the D0-D7 display data pins, the P1.0-P1.7 pins are connected to the D0-D7 pins of the ADC conversion chip U2 to receive an 8-bit output signal, the ALE / PROG pin is connected to the CLK pin of the ADC conversion chip U2 to provide a clock signal for the chip, the P2.7 pin is connected to the START pin of the ADC conversion chip U2 to control the start of AD conversion, and the P2.6 pin is connected to the ALE control pin of the ADC conversion chip U2. Read the address latch, P2.3-P2.5 pins are respectively connected to the RS, RW, and E pins of the LCD1602 liquid crystal screen to control the read and write status of the liquid crystal display screen 9, P2.0-P2.2 are respectively connected to the ADDA-ADDC pins of the ADC conversion chip U2 to control the port for reading analog signals, P3.2 pin is connected to the EOC pin of the ADC conversion chip U2 to control the end of AD conversion, P3.3 pin is connected to the OE pin of the ADC conversion chip U2 to control the output of the converted digital signal to the central processing chip U1, In0-In3 of the ADC conversion chip U2 is responsible for receiving the input analog voltage signal, and the rest are power supply pins and ground pins.

[0025] During specific use, the five connecting wires on the acquisition line row 7 are connected to the X1, X2, X3, X4, and X5 points of the switch circuit according to the identification line sequence. The voltage values ​​measured by the equipment are the logical voltage values ​​of X1 and X2, X3, X4, and X5. The current equipment status is diagnosed through the voltage value, including positioning indication, reverse position indication, and loss of meter. If the switch meter is lost due to a breakpoint, the system will immediately make a judgment and display the diagnostic information, which outdoor line has a breakpoint or a breakpoint occurs indoors, and the emergency repair personnel can directly find the breakpoint based on the breakpoint information.

[0026] In summary: the portable turnout diagnostic equipment provided by the present invention can directly read out the results, which can save more than 60% of the time. If it is used in the normal installation mode, the results can be displayed when the meter is lost, which is more efficient. Secondly, the equipment only uses voltage value judgment, with fewer data conflicts and fewer bugs, so the accuracy is higher and more in line with fault judgment habits. Moreover, the equipment is small in size and low in cost. It can be installed in a combination cabinet to detect the turnout status in real time, and can also be used when needed. At the same time, a variety of power supply methods can be selected, and it can be powered by batteries or a fixed power supply.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A portable turnout diagnostic device, characterized in that: The device comprises a packaged device housing, a liquid crystal display screen (9) is arranged on the front of the device housing, a collection line row (7) and a power line interface (8) are arranged on the side of the device housing, and a circuit board is arranged inside the device housing, the circuit board comprises a collection part, a digital-to-analog conversion part, a logic judgment part and a display part; the collection part converts a 400V power supply into a 2mA current signal through a voltage coupler, and converts it into a DC signal using a rectifier bridge, and generates a stable DC signal after voltage stabilization by a capacitor and a coil; the digital-to-analog conversion part converts the collected analog signal into a usable eight-bit binary signal using an ADC conversion chip U2; the logic judgment part uses an 89C51 central processing chip U1, receives and processes digital signals through C language programming, judges the processed data, and outputs a display signal after obtaining the result; the display part is a corresponding liquid crystal display screen (9).

2. A portable turnout diagnostic device as claimed in claim 1, characterized in that: The acquisition part comprises an AC input terminal (1), a current limiting resistor (2), a voltage transformer (3), a bridge rectifier (4), a capacitor (5) and a coil inductor (6). The AC input terminal (1) is used to connect to a power line interface (8). After the AC power of the power line interface (8) is input through the AC input terminal (1), it enters the voltage transformer (3), and is output 1:1 into the bridge rectifier (4), converting the sinusoidal alternating current into fluctuating DC power. After compensation by the capacitor (5), it becomes DC power with a relatively stable voltage. Finally, after filtering the current by the coil inductor (6), it becomes stable DC power and is output to the AD conversion chip of the digital-to-analog conversion part to convert it into a digital signal.

3. A portable turnout diagnostic device as claimed in claim 1, characterized in that: The XTAL1 and XTAL2 pins of the central processing chip U1 are connected to a 12MHz crystal oscillator to provide a clock for the entire device, the RST pin is connected to a reset circuit, the P0.0-P0.7 pins are connected to an LCD1602 liquid crystal screen, the D0-D7 display data pins, the P1.0-P1.7 pins are connected to the D0-D7 pins of the ADC conversion chip U2 to receive an 8-bit output signal, the ALE / PROG pin is connected to the CLK pin of the ADC conversion chip U2 to provide a clock signal for the chip, the P2.7 pin is connected to the START pin of the ADC conversion chip U2 to control the start of AD conversion, and the P2.6 pin is connected to the ALE of the ADC conversion chip U2 to control the read address lock. The P2.3-P2.5 pins are connected to the RS, RW, and E pins of the LCD1602 liquid crystal screen to control the read and write status of the liquid crystal display screen (9). The P2.0-P2.2 pins are connected to the ADDA-ADDC pins of the ADC conversion chip U2 to control the port for reading analog signals. The P3.2 pin is connected to the EOC pin of the ADC conversion chip U2 to control the end of AD conversion. The P3.3 pin is connected to the OE pin of the ADC conversion chip U2 to control the output of the converted digital signal to the central processing chip U1. The In0-In3 of the ADC conversion chip U2 is responsible for receiving the input analog voltage signal. The rest are power supply pins and ground pins.

4. A portable turnout diagnostic device as claimed in claim 1, characterized in that: The method of use is also as follows: the acquisition line row (7) includes five connecting wires, and the five connecting wires are connected to the X1, X2, X3, X4, and X5 points of the switch machine circuit according to the identification line sequence, and the voltage value measured by the device is the logical voltage value of X1 and X2, X3, X4, and X5.

5. A portable turnout diagnostic device as claimed in claim 4, characterized in that: The current equipment status is diagnosed through voltage value, including positioning indication, reverse position indication and meter loss. If the switch meter loss is caused by a breakpoint, the system will immediately make a judgment and display diagnostic information, indicating which line has a breakpoint outdoors or indoors. Repair personnel can directly find the breakpoint based on the breakpoint information.

6. A portable turnout diagnostic device as claimed in claim 5, characterized in that: The access points of the five connecting wires are located on the indoor cabinet distribution board, which is used to distinguish the direct points of indoor and outdoor circuits, so that corresponding fault judgment can be made when a fault occurs.

Images