Electrical data acquisition device for turnout maintenance

Abstract

The utility model belongs to the technical field of rail transit, and particularly relates to an electrical data acquisition device for turnout maintenance, which comprises an action current acquisition module, an expression voltage acquisition module, a relay signal acquisition module, a processor and a data transceiving module, the action current acquisition module is connected with a current sampling point in a turnout action circuit through a perforated three-phase current acquisition device and is used for acquiring action current in the turnout action circuit; the representation voltage acquisition module is connected with a representation voltage sampling point in the turnout control circuit and is used for acquiring turnout representation voltage; the relay signal acquisition module is connected with a sampling point of a turnout control relay in the turnout control circuit and used for acquiring the voltage of the turnout control relay. According to the utility model, a turnout sampling part is monitored in real time through the data acquisition device, so that parallel acquisition of voltage signals, current signals and switching value signals can be realized; therefore, the sampling part of the turnout can be effectively inspected in real time without excessive inspection manpower.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transportation, and in particular relates to an electrical data acquisition device for turnout inspection and maintenance. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Turnouts are one of the three major components of traditional railway signal systems and play an important role in railway transportation safety. With the opening of high-speed railways, turnouts have evolved from single-machine traction and double-machine traction to the common 5-machine traction and 9-machine traction; the turnout control system operates the turnout according to the control commands issued by the operating terminal, thereby realizing the path control of the train.

[0004] In order to ensure the normal operation of turnout equipment, turnouts currently adopt a manual regular maintenance mode. However, due to the large number of objects to be inspected and insufficient human resources, it is difficult to grasp the status of turnouts in a timely manner. Moreover, manual regular maintenance is also difficult to discover safety hazards of turnout equipment in advance, and it is difficult to judge and eliminate faults in a short time. Therefore, the status monitoring of turnouts has become an important issue for railway bureaus in daily maintenance and safe production.

[0005] For example, the patent with publication number CN 206945914 U discloses a switch control relay monitoring device, including a current sensor group and a collection board, the current sensor group includes a first current sensor and a second current sensor, the first current sensor collects the current of the control circuit of the relay, the second current sensor collects the current of the working circuit of the relay, the collection board includes a collection port, and the current sensor group is connected to the collection port. The device can collect the current of the control circuit and the working circuit of the relay, and transmit the test signal collected by the current sensor group to the collection port on the collection board, which can be used to determine the working state of the relay, timely discover the aging state of the relay and locate the fault point.

[0006] However, the monitoring device can only collect current data in the turnout control circuit to analyze relay failures. The monitoring range is limited and it is unable to collect voltage data and switch signals. Moreover, the device must not only meet basic stability and functional requirements, but the power consumption of the equipment is also a technical issue that needs to be considered. If the device is always in standby mode, the power consumption will be high, which is not conducive to long-term stable operation. Utility Model Content

[0007] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides an electrical data acquisition device for turnout maintenance.

[0008] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0009] An electrical data acquisition device for turnout maintenance, comprising an action current acquisition module, an indication voltage acquisition module, a relay signal acquisition module, a processor and a data transceiver module, wherein the processor is respectively connected to the action current acquisition module, the indication voltage acquisition module, the relay signal acquisition module and the data transceiver module;

[0010] The electrical data acquisition device for turnout maintenance further comprises a timing module, and the processor is connected to the power supply module via the timing module;

[0011] The action current collection module is connected to the current sampling point in the turnout action circuit through a perforated three-phase current collector, and is used to collect the action current in the turnout action circuit;

[0012] The indicating voltage acquisition module is connected to the indicating voltage sampling point in the turnout control circuit and is used to collect the indicating voltage of the turnout;

[0013] The relay signal acquisition module is connected to a sampling point of a turnout control relay in a turnout control circuit and is used to acquire the voltage of the turnout control relay.

[0014] One or more of the above technical solutions have the following beneficial effects:

[0015] (1) The utility model monitors the sampling part of the turnout in real time through the data acquisition device, and can realize the parallel acquisition of voltage signals, current signals and switch signals; the status of the sampling part of the turnout can be obtained by analyzing and comparing the acquired data, so that the sampling part of the turnout can be effectively inspected in real time without too much inspection manpower, and then the fault can be discovered, which solves the problem of low efficiency of existing manual turnout maintenance and can timely and effectively discover turnout faults.

[0016] (2) The monitoring device provided by the utility model has a timed opening and closing function module, which solves the problem of high power consumption of the automated monitoring equipment, realizes the timed start-up of unattended automated equipment, and collects electrical data at intervals.

[0017] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0019] Figure 1 This is a schematic diagram of an electrical data acquisition device for turnout maintenance in Example 1.

[0020] Figure 2 This is a top view of an electrical data acquisition device for turnout maintenance in Example 1.

[0021] Figure 3 This is a schematic diagram of the interface connection of an electrical data acquisition device for turnout maintenance in Example 1.

[0022] Figure 4 (a) and (b) are respectively the built-in terminals of the voltage acquisition interface of an electrical data acquisition device for turnout maintenance in Example 1.

[0023] Figure 5 Schematic diagram of the liquid crystal display and timing module of Example 1. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Embodiment 1

[0026] like Figure 1 As shown, the utility model proposes an electrical data acquisition device for turnout maintenance, including an action current acquisition module, an indication voltage acquisition module, a relay signal acquisition module, a processor and a data transceiver module, the processor is respectively connected to the action current acquisition module, the indication voltage acquisition module, the relay signal acquisition module and the data transceiver module, the processor is used to process and temporarily store the data collected by the acquisition module, and the data transceiver module is used to transmit the data cached in the processor to the host computer;

[0027] Among them, the action current acquisition module is connected to the current sampling point in the turnout action circuit through a perforated three-phase current collector, and is used to collect the action current in the turnout action circuit; the indication voltage acquisition module is connected to the indication voltage sampling point in the turnout control circuit, and is used to collect the turnout indication voltage; the relay signal acquisition module is connected to the sampling point of the turnout control relay in the turnout control circuit, and is used to collect the voltage of the turnout control relay.

[0028] The monitoring device provided by the utility model can realize the collection and monitoring of key information of the turnout, such as the three-phase input current, the three-phase input voltage, the turnout indication voltage, the relay switch quantity signal and the like in the turnout control circuit; it can judge whether the turnout is switched normally by monitoring the three-phase current, comprehensively judge the position of the turnout by monitoring the turnout indication voltage and the three-phase input voltage, and monitor whether the relay is in place by collecting the switch quantity of the relay, thereby realizing comprehensive monitoring of the turnout state and being able to timely and effectively discover turnout faults.

[0029] As a further technical solution, the action current acquisition module includes a signal conditioning module and an analog-to-digital converter connected in sequence. The three-phase current collector is connected to the processor through the signal conditioning module and the analog-to-digital converter. The signal conditioning module and the analog-to-digital converter are respectively used to condition and convert the collected current into analog-to-digital form.

[0030] The signal conditioning module model used is the T1133P signal conditioning module, which is an analog signal isolation module with front-stage current / voltage signal input and rear-stage current / voltage signal output, also known as an isolation transmitter. It has an embedded high-efficiency micro-power supply, which can output an isolated power supply to the front-stage sensor while supplying power to the internal signal processing circuit. The product adopts electromagnetic isolation technology internally, with the characteristics of input / output / power supply / isolated power supply isolation, which can completely replace the traditional linear optocoupler isolation solution, and the product has better temperature drift characteristics, linearity and accuracy than the optocoupler isolation solution; it is widely used in signal isolation conversion such as PLC, DCS, MCU, etc.

[0031] The analog-to-digital converter model is the Texas Instruments ADS7850IRTET digital-to-analog converter, which converts the collected analog quantity into the corresponding TTL / CMOS digital signal to realize data transmission.

[0032] like Figure 2 , Figure 3 As shown, the Ia interface, Ib interface and Ic interface on the three-phase current collector are connected to the corresponding current sampling points through the leads inserted into the interfaces. The current loop structure of the three-phase current collector is a ring-shaped synchronous type, which is staggered by sealed copper foil windings. The inside of the foil winding contains a coil bundle with a certain cross-sectional area. The winding form is a DC loop. The three sets of current loops are arranged longitudinally through the bottom plug-in board. At the same time, the current loop input is the current sampling point, and the output is the Ia* interface, Ib* interface and Ic* interface, and they are connected in parallel with the Ia interface, Ib interface and Ic interface to the current collection interface.

[0033] As a further technical solution, the current sampling points in the turnout action circuit include: node 12 of the turnout first starting relay 1DQJ, nodes 12 and 13 of the turnout first starting repeater relay 1DQJF, and nodes 12, 13 and 23 of the turnout second starting relay 2DQJ.

[0034] The Ia interface is connected to the 12th node of 1DQJ and the 12th node of 2DQJ through leads; the Ib interface is connected to the 12th node of 1DQJF and the 13th node of 2DQJ through leads; the Ic interface is connected to the 13th node of 1DQJF and the 23rd node of 2DQJ through leads.

[0035] When the relay is in action, a short-term steep rise or drop in voltage will be generated. The voltage change will cause current fluctuations. By collecting the node current, its peak value and steady-state value are used for approximate matching to see whether it meets the current on-off condition of the node during normal conversion, and then judge whether the relay is completely fitted and whether the control circuit of this part is connected. At the same time, due to the particularity of 1DQJ, its normal connection is related to whether the turnout has been started normally and whether it can be converted normally. Therefore, the current of its 12 nodes is collected. 1DQJF is a complex vision of 1DQJ, and the current of its 12 and 13 nodes is collected to play a redundant protection role. 2DQJ is a polar reinforced relay. It has the characteristic of polarity retention, which means that when the direction of the coil current changes, the connection state of the contact will also change accordingly. When the turnout switches from positioning to reverse position, the 1-2 coil circuit is connected, and the front contact connection changes to the rear contact connection; when the turnout switches from reverse position to positioning, the 3-4 coil circuit is connected, and the rear contact connection changes to the front contact connection. The change of the contact will inevitably cause the current to change. The current is collected and transmitted to the host computer to determine whether the turnout is switched normally.

[0036] As a further technical solution, the voltage acquisition module includes a three-phase voltage acquisition interface, an 8-channel voltage acquisition terminal and a voltage divider circuit. The three-phase voltage acquisition interface and the 8-channel voltage acquisition terminal are connected to the processor through the voltage divider circuit.

[0037] The three-phase voltage acquisition interface adopts the three-phase five-wire TN-S grounding method to connect with the voltage sampling point of the DBQ phase-break protector in the turnout control circuit; the 8-channel voltage acquisition terminal is connected with the X1 loop to the X8 loop in the turnout control circuit;

[0038] Since the turnout power supply adopts a three-phase five-wire system, the unbalanced three-phase current may cause serious consequences such as overload and burning of electrical equipment. The function of the phase failure protector DBQ is to monitor whether the three-phase current in the power system is balanced. When the three-phase current is unbalanced, the circuit is cut off in time to protect the electrical equipment. Therefore, by connecting DBQ, the phase failure protection of this device and other monitoring equipment, signal transmission and other equipment can be realized.

[0039] like Figure 4 As shown in (a) and (b), the 8-channel voltage acquisition terminal is a parallel connection of two 4-channel acquisition terminals; the IN- contact on the terminal is connected to X1 or X5 when measuring the switch position indication voltage; the IN+ contact on the terminal is connected to X2 or X6 when measuring the switch position indication voltage; the IN- contact on the terminal is connected to X2 or X6 when measuring the switch reverse position indication voltage; the IN+ contact on the terminal is connected to X4 or X8 when measuring the switch reverse position indication voltage.

[0040] As a further technical solution, the voltage sampling points set on the DBQ phase failure protector in the turnout control circuit include: node 12, node 13, node 23, and grounding node 1 and grounding node 2 of the DBQ phase failure protector.

[0041] The three-phase voltage collection interfaces on the device include: Ua interface, Ub interface, Uc interface, DBQU+ interface and DBQU- interface; the Ua interface is connected to the 12th node of the DBQ phase failure protector, the Ub interface is connected to the 13th node of the DBQ phase failure protector, the Uc interface is connected to the 23rd node of the DBQ phase failure protector, and the DBQU+ interface and DBQU- interface are respectively connected to the 1st grounding node and the 2nd grounding node of the DBQ phase failure protector.

[0042] As a further technical solution, Figure 5 As shown, the processor is an 80c51 single-chip microcomputer, which is connected to the clock circuit and the reset circuit. The clock is an external crystal oscillator with a frequency of 6MHz. At the same time, the P1 port is connected to the U1 and U2 optical couplers to achieve timing on and off relays by setting the time and displaying it on the LCD screen, thereby achieving timing on and off of the power supply to achieve energy saving.

[0043] The 51 single-chip microcomputer has two bidirectional ports and five input ports; the bidirectional ports are respectively connected with the host computer for bus communication and timing setting, and the five input ports are respectively connected with the relay acquisition module, the voltage acquisition module, the action current acquisition module, the phase failure protector and the external power supply box.

[0044] The communication between the 51 single-chip microcomputer and the host computer adopts the RS-485 data transceiver module, which includes the TD522D485H-A type isolation transceiver, which can convert the logic level into the differential level of the RS485 protocol to achieve signal isolation; it is an RS485 protocol transceiver module that uses IC integrated technology to achieve power isolation, signal isolation, RS485 communication and bus protection. The product comes with a constant voltage isolation power supply, which can achieve 2500VDC electrical isolation;

[0045] The data transceiver module has the function of automatically switching between transceiver and transceiver. It does not need to control transceiver through CON pin. It can receive or send data by controlling the high and low levels of TXD pin and RXD pin, which reduces the complexity of design to a certain extent. It can be easily embedded in user equipment, so that the equipment can easily realize the connection function of RS485 protocol network.

[0046] As a further technical solution, a power supply is also included, which is connected to the processor, the data transceiver module, the signal acquisition module and the liquid crystal display module respectively, and is used to power each module. In addition, an IB2412XT-1WR3 power isolation module is set between the processor and the external power box (DC-24V) for short-circuit protection to prevent the operator from electric shock. No matter which line the operator touches, there will be no danger of electric shock, thus avoiding production safety accidents.

[0047] As a further technical solution, the relay signal acquisition module is used to collect the switching signals of the turnout first starting relay 1DQJ, the turnout second starting relay 2DQJ, the turnout first starting repeater relay 1DQJF, the turnout main protection relay ZBHJ, the turnout starting cut-off relay QDJ, the switch machine protection relay BHJ and the turnout positioning indication relay DBJ.

[0048] As a further technical solution, the relay signal acquisition module has 1DQJ+, 1DQJ-, 1DQJF+, 1DQJF-, DBJ, FBJ, and BHJ interfaces; the DQJ+ interface is connected to the 1DQJ input end, and the corresponding switch quantity is obtained by inputting 0-50MA current, and the 1DQJ- interface is connected to the 1DQJ output end, and the switch quantity is transmitted to the host computer through the RS485 bus; the 1DQJF+ interface is connected to the 1DQJF input end, and the corresponding switch quantity is obtained by inputting 0-50MA current, and the 1DQJF- interface is connected to the 1DQJF output end, and the switch quantity is transmitted to the host computer through the RS485 bus; by connecting the three interfaces DBJ, FBJ, and BHJ in parallel with the corresponding relays of DBJ, FBJ, and BHJ, the corresponding switch quantity can be obtained by inputting 0-50MA current and transmitted back to the host computer. It is used to collect the switch quantity signals of the first start relay 1DQJ, the second start relay 2DQJ, the first start repeat relay 1DQJF, the switch machine protection relay BHJ, the switch position indication relay DBJ, and the switch reverse position indication relay FBJ. The switch quantity is collected to assist the host computer in judging whether the specific corresponding relay is in place when the switch is in motion, whether a fault occurs, and to judge the specific fault relay position.

[0049] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. An electrical data acquisition device for turnout maintenance, characterized in that: It includes an action current acquisition module, a voltage acquisition module, a relay signal acquisition module, a processor and a data transceiver module, wherein the processor is respectively connected to the action current acquisition module, the voltage acquisition module, the relay signal acquisition module and the data transceiver module; The action current collection module is connected to the current sampling point in the turnout action circuit through a perforated three-phase current collector, and is used to collect the action current in the turnout action circuit; The indicating voltage acquisition module is connected to the indicating voltage sampling point in the turnout control circuit and is used to collect the indicating voltage of the turnout; The voltage acquisition module includes a three-phase voltage acquisition interface, an 8-channel voltage acquisition terminal and a voltage divider circuit; The three-phase voltage acquisition interface is connected to the voltage sampling point of the DBQ phase-break protector in the turnout control circuit by a three-phase five-wire TN-S grounding method; the 8-channel voltage acquisition terminal is connected to the X1 loop to the X8 loop in the turnout control circuit; The voltage acquisition interface and the 8-channel voltage acquisition terminal are connected to the processor via a voltage divider circuit; The relay signal acquisition module is connected to a sampling point of a turnout control relay in a turnout control circuit, and is used to collect the voltage of the turnout control relay; The relay signal acquisition module has 1DQJ+, 1DQJ-, 1DQJF+, 1DQJF-, DBJ, FBJ, and BHJ interfaces; the DQJ+ interface is connected to the 1DQJ input terminal, and the corresponding switch quantity is obtained by inputting a 0-50MA current, and the 1DQJ- interface is connected to the 1DQJ output terminal, and the switch quantity is transmitted to the host computer through the RS485 bus; the 1DQJF+ interface is connected to the 1DQJF input terminal, and the corresponding switch quantity is obtained by inputting a 0-50MA current, and the 1DQJF- interface is connected to the 1DQJF output terminal, and the switch quantity is transmitted to the host computer through the RS485 bus. ; After connecting the three interfaces DBJ, FBJ, and BHJ in parallel with the corresponding relays of DBJ, FBJ, and BHJ, the corresponding switching quantity is obtained by inputting 0-50MA current and transmitted back to the host computer; it is used to collect the switching quantity signals of the first start relay 1DQJ of the turnout, the second start relay 2DQJ of the turnout, the first start repeat relay 1DQJF of the turnout, the protection relay BHJ of the switch machine, and the turnout positioning indication relay DBJ and the turnout reverse position indication relay FBJ; by collecting the switching quantity, it is used to assist the host computer in judging whether the specific corresponding relay is in place when the turnout is in motion, whether a fault occurs, and to judge the specific position of the faulty relay.

2. The electrical data acquisition device for turnout maintenance according to claim 1, characterized in that: The Ia interface, Ib interface and Ic interface on the three-phase current collector are connected to corresponding current sampling points through leads inserted into the interfaces respectively.

3. The electrical data acquisition device for turnout maintenance according to claim 2, characterized in that: The current sampling points in the turnout action circuit include: node 12 of the turnout first starting relay 1DQJ, nodes 12 and 13 of the turnout first starting repeater relay 1DQJF, and nodes 12, 13 and 23 of the turnout second starting relay 2DQJ.

4. The electrical data acquisition device for turnout maintenance according to claim 3, characterized in that: The Ia interface is connected to the 12th node of 1DQJ and the 12th node of 2DQJ through leads; the Ib interface is connected to the 12th node of 1DQJF and the 13th node of 2DQJ through leads; the Ic interface is connected to the 13th node of 1DQJF and the 23rd node of 2DQJ through leads.

5. The electrical data acquisition device for turnout maintenance according to claim 1, characterized in that The voltage sampling points of the DBQ phase failure protector include: node 12, node 13, node 23, grounding node 1 and grounding node 2 of the DBQ phase failure protector.

6. The electrical data acquisition device for turnout maintenance according to claim 5, characterized in that: The three-phase voltage acquisition interface includes: Ua interface, Ub interface, Uc interface, DBQU+ interface and DBQU- interface; The Ua interface is connected to the 12th node of the DBQ phase failure protector, the Ub interface is connected to the 13th node of the DBQ phase failure protector, the Uc interface is connected to the 23rd node of the DBQ phase failure protector, and the DBQU+ interface and the DBQU- interface are respectively connected to the 1st grounding node and the 2nd grounding node of the DBQ phase failure protector.

7. The electrical data acquisition device for turnout maintenance according to claim 1, characterized in that: The relay signal acquisition module is used to collect the switching signals of the turnout first starting relay 1DQJ, the turnout second starting relay 2DQJ, the turnout first starting repeating relay 1DQJF, the turnout main protection relay ZBHJ, the turnout starting cutting relay QDJ, the switch machine protection relay BHJ and the turnout positioning indicating relay DBJ.

8. The electrical data acquisition device for turnout maintenance according to claim 1, characterized in that: It also includes a timing module, and the processor is connected to the power supply module through the timing module.

9. The electrical data acquisition device for turnout maintenance according to claim 1, characterized in that: The data transceiver module is an RS-485 data transceiver module, and the processor is a 51 single chip microcomputer.

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