CN211785854U - Indoor interlocking test device for computer simulation station signal - Google Patents
Indoor interlocking test device for computer simulation station signal Download PDFInfo
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- CN211785854U CN211785854U CN202020091128.4U CN202020091128U CN211785854U CN 211785854 U CN211785854 U CN 211785854U CN 202020091128 U CN202020091128 U CN 202020091128U CN 211785854 U CN211785854 U CN 211785854U
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Abstract
The invention relates to the field of indoor interlocking tests of railway station signals, in particular to a device for establishing a railway station shape simulation by using computer software to perform an indoor interlocking test. The interlocking test device collects the display and turnout indication of the annunciator in real time, achieves the purpose of interlocking test on indoor equipment, and ensures the accuracy of the interlocking test. The device comprises an analog track circuit, an analog annunciator lighting circuit and an analog turnout indication circuit; the analog track circuit comprises a plurality of driving modules, the driving modules are connected with an upper computer through 485 buses, and the output of each driving module is connected with a field distribution board; the analog turnout representation circuit also comprises a plurality of acquisition modules and a plurality of groups of turnout port relays.
Description
Technical Field
The invention relates to the field of indoor interlocking tests of railway station signals, in particular to a device for establishing a railway station shape simulation by using computer software to perform an indoor interlocking test.
Background
In the railway station signal engineering construction, after indoor equipment is installed and wired, an interlocking test of the indoor equipment is required to be carried out, namely, the interlocking test without accessing outdoor equipment is carried out, the interlocking test of the indoor equipment takes a distribution panel as a boundary, the connection with equipment such as an outdoor color light annunciator, an electric point switch, a track circuit, coding and the like is disconnected, and the interlocking test is carried out independently indoors through closed conditions and simulation of various outdoor equipment circuits. The interlocking test of the indoor equipment is the general inspection of the installation, wiring and electrical characteristic debugging of the indoor construction of the electric centralized interlocking and microcomputer interlocking station, and is the most critical and important test item which relates to whether the electric centralized interlocking or microcomputer interlocking equipment of the railway station can ensure one-time opening and safe operation.
The traditional interlocking test method is to manufacture a simulation panel, install a large number of button switches, incandescent bulbs and high-power diodes on a bakelite board, simulate outdoor track circuits, annunciator circuits, turnout circuits and carry out tests after connecting with corresponding terminals of a distribution panel, wherein the button switches and the bulbs have larger volumes and occupy large construction space; in addition, because the station yard shapes of all railway stations are different, the simulation disc needs to be manufactured again when each station is tested, and the investment of materials and personnel is increased; and the button switch and the bulb are not convenient to carry and transport, and the button switch and the bulb are basically discarded after the test of each station is finished, so that great material waste is caused. With the continuous development of computer technology, the intelligent, informatization and modularization technology of the computer can be applied to the indoor interlocking test of the signal engineering, the space and the environment of the test are improved, the traditional test method and efficiency are improved and improved, and the construction cost is saved.
Disclosure of Invention
The invention aims at the defects in the prior art and provides a computer simulation station signal indoor interlocking test device which utilizes an upper computer to control the suction and falling of indoor track relays, the suction and falling of approaching and leaving relays and other relays through data transmission with a hardware interface, and acquires the display and turnout representation of a signal machine in real time, thereby achieving the purpose of interlocking test on indoor equipment and ensuring the accuracy of the interlocking test.
In order to achieve the purpose, the invention adopts the following technical scheme that the device comprises an analog track circuit, an analog signal machine lighting circuit and an analog turnout indication circuit.
The analog track circuit comprises a plurality of driving modules, the driving modules are connected with an upper computer through 485 buses, and the output of the driving modules is connected with a field distribution board.
The analog annunciator lighting circuit comprises a plurality of acquisition modules and lighting port relays, the acquisition modules are connected with the upper computer through 485 buses, and each acquisition module is connected with the normally-open points or the normally-closed points of the lighting port relays and used for acquiring whether the port relays are electrified or not; the coil of each port relay is connected in parallel with two ends of the LED lamp, and after the LED lamp is connected with the resistor in series, two free ends of the series circuit are connected with field equipment (a field distribution panel) for lighting the analog signal machine.
The analog turnout representation circuit also comprises a plurality of acquisition modules and a plurality of turnout port relays, wherein the acquisition modules are connected with an upper computer through 485 buses; each group of turnout port relays comprises two port relays: a first port relay and a second port relay; each acquisition module is connected with normally-open points or normally-closed points of a plurality of groups of turnout port relays and is used for acquiring whether the port relays are electrified or not; in each group of switch port relays: one end of the first port relay coil is connected with one end of the first diode, and the other end of the coil is connected with the other end of the first diode; the two ends of the first diode are also connected with a field circuit; one end of a coil of the second port relay is connected with one end of a second diode, and the other end of the coil of the second port relay is connected with the other end of the second diode; the second diode is also connected at both ends to the field circuit (field distribution board).
Furthermore, two ends of the series circuit of the analog signal lighting circuit are also connected with a capacitor in parallel.
Further, the driving module is a 6-way driving module and comprises relays KA1, KA2, KA3, KA4, KA5, KA6 and a chip ULN 2003; pins 1 to 7 of the chip ULN2003 are connected with a main control chip AT89C2051 through an optocoupler TLP 521-4; pins 16 to 11 of the chip ULN2003 are connected to one ends of coils of relays KA1 to KA6, respectively; normally open contacts of the relays KA1 to KA6 are used as switches and are connected with field equipment (field distribution board) through connecting terminals; the coil of the relay KA1 to the other end of the relay KA6 are respectively connected with + 12V.
Furthermore, the driving module further comprises light emitting diodes D9 to D15, the positive terminals of the light emitting diodes D9 to D15 are connected to +12V, and the negative terminals of the light emitting diodes D9 to D15 are connected to pins 16 to 10 of the ULN 2003.
Further, the acquisition module comprises a main control chip AT89C2051 and an optocoupler TLP 512; the master control chip is connected with the optocoupler TLP512 and used for signal isolation; and the main control chip is connected to an upper computer through a serial port.
Furthermore, in the analog signal machine lighting circuit, one end of a coil at the output end of the lighting port relay is connected with + VCC, and the other end of the coil at the output end of the lighting port relay is connected with an optocoupler TLP512 of the acquisition module; the main control chip in the acquisition module acquires whether the coil of the port relay is powered or not through the optocoupler TLP 512.
Furthermore, in the analog turnout indication circuit, one ends of the coils at the output ends of the first port relay and the second port relay are both connected with + VCC, and the other ends of the coils at the output ends of the first port relay and the second port relay are connected with an optocoupler TLP512 of the acquisition module; the main control chip in the acquisition module acquires whether the coil of the port relay is powered or not through the optocoupler TLP 512.
Compared with the prior art, the invention has the beneficial effects.
The invention adopts the singlechip and the interface relay to realize the integration and modularization of the simulation test equipment, has small volume, is convenient to carry and saves the construction debugging space.
The invention realizes the intellectualization and informatization of the simulation test equipment, and utilizes the high-speed information transmission between the computer and the electronic element to improve the test speed, improve the construction efficiency and save the time of the interlocking test.
The invention is universal in each construction station, breaks through the traditional test mode that each station is manufactured with a simulation disc, is manufactured by one-time investment, can be used for a long time, greatly saves labor cost and material cost, and greatly saves construction cost.
The invention covers all indoor interlocking test simulation conditions of station signal engineering, replaces the traditional various simulation discs, can thoroughly test indoor circuits, has accurate data and provides powerful guarantee for the right point of construction.
Drawings
The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.
Fig. 1 is a diagram of a station yard and operation buttons drawn in the queen of upper machine configuration.
FIG. 2 is a schematic diagram of an analog track circuit of the present invention.
Fig. 3 is a schematic diagram of an analog traffic signal lighting circuit according to the present invention.
Fig. 4 is a schematic diagram of the analog switch indication circuit of the present invention.
FIG. 5 is a circuit diagram of a driving module according to the present invention.
Fig. 6 is a circuit diagram of an acquisition module of the present invention.
Detailed Description
As shown in fig. 1 to 6, the present invention includes three parts, an analog track circuit, an analog traffic signal lighting circuit, and an analog switch indication circuit.
The analog track circuit comprises a plurality of driving modules, the driving modules are connected with an upper computer through 485 buses, and the output of the driving modules is connected with a field distribution board.
The analog annunciator lighting circuit comprises a plurality of acquisition modules and lighting port relays, the acquisition modules are connected with the upper computer through 485 buses, and each acquisition module is connected with the normally-open points or the normally-closed points of the lighting port relays and used for acquiring whether the port relays are electrified or not; the coil side of each port relay is connected in parallel with the two ends of the LED lamp; and after the LED lamp is connected with the resistor in series, two free ends of the series circuit are connected with field equipment (a field distribution panel) and are used for lighting an analog signal machine.
For example, the following steps are carried out: in the analog signal machine lighting circuit, the input end (coil side) of the port relay 1 is connected with the positive pole and the negative pole of a red Light Emitting Diode (LED), when the analog circuit of a red light is switched on, and when current passes through the red LED, the input end coil of the port relay 1 also has current to pass through, the relay coil is excited, so that the contacts of the output ends 11 and 12 are switched on, the 1 st path of the acquisition module acquires the switching-on condition of the output end of the port relay 1, and the switching-on condition is transmitted back to computer software, and the corresponding signal machine lights the red light. And so on for other analog semaphores.
The analog turnout representation circuit also comprises a plurality of acquisition modules and a plurality of turnout port relays, wherein the acquisition modules are connected with an upper computer through 485 buses; each group of turnout port relays comprises two port relays: a first port relay and a second port relay; each acquisition module is connected with normally-open points or normally-closed points of a plurality of groups of turnout port relays and is used for acquiring whether the port relays are electrified or not; in each group of switch port relays: one end of a coil of the first port relay is connected with one end of the first diode, and the other end of the coil is connected with the other end of the first diode; the two ends of the first diode are also connected with a field circuit; one end of a coil of the second port relay is connected with one end of a second diode, and the other end of the coil of the second port relay is connected with the other end of the second diode; the second diode is also connected at both ends to the field circuit (field distribution board).
Furthermore, two ends of the series circuit of the analog signal lighting circuit are also connected with a capacitor in parallel.
For example, the following steps are carried out: in the analog turnout indication circuit, the anode of a diode for simulating the positioning of the No. 1 turnout is connected with the cathode of a diode for reversing the No. 1 turnout, and then is connected with a collinear X3 of a spot turnout circuit, the cathode of the diode for positioning the No. 1 turnout is connected with a spot turnout circuit X1, and the anode of the diode for reversing the No. 1 turnout is connected with a spot turnout circuit X2; the input coil side A2 of the port relay 1 is connected with the input coil side A2 of the port relay 2 in a loop and then is connected with a common line X3, the input coil side A1 of the port relay 1 is connected with the cathode of a No. 1 turnout positioning diode, and the input coil side A1 of the port relay 2 is connected with the anode of a No. 1 turnout reversal diode. When the No. 1 turnout is positioned, the positioning diode is electrified, the input end coil of the port relay 1 is also electrified, the relay coil is excited to switch on the connection points of the output ends 11 and 12, the 1 st path of the acquisition module acquires the switching-on condition of the output end of the port relay 1 and transmits the switching-on condition back to the computer software, and the positioning of the No. 1 turnout indicates that the lamp is turned on. Similarly, when the No. 1 turnout is in the reverse position, the reverse diode is electrified, the coil of the input end of the port relay 2 is also electrified, the coil of the relay is excited to switch on the contacts of the output ends 11 and 12, the 2 nd path of the acquisition module acquires the switching-on condition of the output end of the port relay 2 and transmits the switching-on condition back to the computer software, and the reverse position of the No. 1 turnout indicates that the yellow light is turned on. Other switches are indicated and so on.
Further, the driving module is a 6-way driving module and comprises relays KA1, KA2, KA3, KA4, KA5, KA6 and a chip ULN 2003; pins 1 to 7 of the chip ULN2003 are connected with a main control chip AT89C2051 through an optocoupler TLP 521-4; pins 16 to 11 of the chip ULN2003 are connected to one ends of coils of relays KA1 to KA6, respectively; normally open contacts of the relays KA1 to KA6 are connected as switches to field devices (field distribution boards); the coil of the relay KA1 to the other end of the relay KA6 are respectively connected with + 12V.
Furthermore, the driving module further comprises light emitting diodes D9 to D15, the positive terminals of the light emitting diodes D9 to D15 are connected to +12V, and the negative terminals of the light emitting diodes D9 to D15 are connected to pins 16 to 10 of the ULN 2003.
Further, the acquisition module comprises a main control chip AT89C2051 and an optocoupler TLP 512; the master control chip is connected with the optocoupler TLP512 and used for signal isolation; and the main control chip is connected to an upper computer through a serial port.
Furthermore, in the analog signal machine lighting circuit, one end of a coil of a lighting port relay (output end) is connected with + VCC, and the other end of the coil of the lighting port relay output end is connected with an optocoupler TLP512 of the acquisition module; the main control chip in the acquisition module acquires whether the coil of the port relay is powered or not through the optocoupler TLP 512.
Furthermore, in the analog turnout indication circuit, one ends of the coils at the output ends of the first port relay and the second port relay are both connected with + VCC, and the other ends of the coils at the output ends of the first port relay and the second port relay are connected with an optocoupler TLP512 of the acquisition module; the main control chip in the acquisition module acquires whether the coil of the port relay is powered or not through the optocoupler TLP 512.
Specifically, in actual work, the upper computer draws a railway station yard shape diagram by using configuration software, writes control and acquisition programs of a track circuit, a signal machine and a turnout, controls the suction and falling of indoor track relays, the suction and falling of scattered circuit relays such as approaching and leaving relays and the like through data transmission of a hardware interface, and acquires the display and turnout representation of the signal machine in real time, so that the purpose of an indoor equipment interlocking test is achieved, and the accuracy of the interlocking test is ensured. In fig. 3, the Light Emitting Diode (LED) has five colors of yellow, green, red, white, and blue, and the types of the light emitting diode are: FG 314003-phi 5mm, 20mA, the types of the resistors are 62K omega and 150K omega, and the type of the capacitor is 2.25 muf. In fig. 4, the types of the high power diode are: IN5400-IN 54083A 50-1000V. In fig. 5, TLP _521-4) is an integrated optical coupling isolation device, which prevents the U2 chip from being broken down and burning the U4 main control chip; the pin 8 of the chip U2 (ULN 2003) is zero potential ground, the output ends out 1-out 6 on the upper surface of the figure generate driving voltage and current, and KA 1-KA 6 coil relays and KA 1-KA 6 control the contact of the chip U2 to be opened and closed after receiving signals, so that the driving function is realized. out 1-out 6 are LED status lights, which are turned on to monitor the status of the output terminals when outputting a high level.
Specifically, in actual work, the analog track circuit adopts a 6-way driving module, each way of output of the module is provided with a common contact and a normally closed contact, the common contact and the normally closed contact are equivalent to a digital switch, and the analog track circuit receives an instruction of an upper computer to execute on-off action. The driving module is connected with the upper computer through a 485 data line and used for receiving instructions; each path of contact is connected with a track circuit of a construction site through a wiring terminal. When the track circuit is tested, a mouse is used for clicking a clear button (white) or an occupied button (red) of a corresponding track section in a station graph (shown in figure 1), software sends a corresponding instruction to control the on-off of a digital switch in a driving module, so that the purpose of controlling on-site track circuit relays (1 GJ, 3GJ and the like) is achieved, and the test of the track circuit is completed. The configuration number of the specific driving modules is determined according to the size of an actual station. Normally, each path of electronic switch in the driving module is in a normally closed state, the GJ corresponding to the site is in a suction state, and a track section on a station (shown in figure 1) displays a gray light band to represent that the section is idle; when the sector needs to be occupied, the occupied button is clicked, the driving module receives a software occupied instruction, the corresponding digital switch is switched off, and the GJ relay loses magnetism and falls down. When the sections need to be cleared, the clear button is clicked, the drive module receives a clear instruction of soft opening, the corresponding digital switch is closed, the GJ relay of the corresponding section is sucked up, the track section in the station yard displays a gray light band, and clear clearing of the sections is completed.
Specifically, in actual operation, the analog traffic signal lighting circuit: the signal simulation circuit (namely, the annunciator lighting circuit) simulates the outdoor annunciator lighting circuit by serially connecting the light-emitting diodes with the same colors as the outdoor annunciator with the low-power resistors, so that the power transmission voltage condition of the indoor circuit is not changed, and the indoor lighting circuit can be thoroughly tested. Adopt 8 discrete magnitude collection module (can gather 8 lamp positions, and the quantity of concrete collection module is decided according to how much of actual station semaphore), can gather and receive the data of the analog circuit of lighting a lamp to in the response replies the computer, give the semaphore demonstration unanimous with simulation light after the software discernment, because collection module gathers be the undercurrent, the semaphore lights a lamp the analog circuit the electric current will be greater than 110 mA's heavy current, consequently will isolate the collection with the port relay. When the lighting circuit of the annunciator is tested, each light display of each analog annunciator is opened according to the program, when light emitting diode lights, current passes through the branch, the current is sensed by the port relay input end, the port relay contact is closed, the output data is provided for the acquisition module, the acquisition module transmits the information to the software after acquiring the information, the annunciator in the analog station is corresponding to light and is also lighted, at the moment, the analog annunciator, the light display of the control desk lamp, the light display of the analog station is consistent, and the test accuracy is ensured. When the signal machine is in a closed state, the light-emitting diode in the analog circuit is also turned off, no current passes through the branch, no current can be collected by the port, the branch is in a disconnected state, the corresponding light of the signal machine in the analog station is also turned off, and the analog test of the signal machine is completed by using the two states.
In actual operation, in particular, the simulated switch points represent circuits,
the 8-path discrete quantity acquisition module is adopted (the number of the specific acquisition module is determined according to the number of the turnouts of an actual station), the data of the simulation turnout representation circuit can be acquired and received, the response is replied to a computer, and the positioning or inversion representation of the turnout is given in a simulation station after the software identification. And a port relay is used for current isolation between the acquisition module and the turnout indication circuit. Each group of turnouts in the turnout indication acquisition circuit adopts two port relays, the first port relay A1 is connected with a DBJ (positioning indication relay) branch X1 on the site, the second port relay A1 is connected with an FBJ (inverted indication relay) branch X2 on the site, and the two port relays A2 are connected with a common return line X3 on the site after being connected in a ring mode. Each set of switches has two states of positioning and flipping, so 2 ways of acquisition modules need to be used, meaning that each acquisition module of 8 ways can acquire the representation of 4 sets of switches.
During the turnout test, the turnout is operated to be positioned at the control console, currents pass through the branches X1 and X3 in the analog circuit, the currents pass through the branches A1 and A2 of the corresponding port relay 1 at the moment, the output end contact of the port relay is closed, the 1 path of the acquisition module receives the information and transmits the information to the analog software, the turnout corresponding to the station yard indicates that a green light is turned on, and the turnout displays the positioning position. When the turnout is operated to the reverse position, the A1 and A2 in the corresponding port relay 2 have current to pass through at the moment, the output end contact of the port relay is closed, the 1 path of the acquisition module receives the information and transmits the information to the simulation software, the turnout corresponding to the station yard indicates that the yellow light is turned on, and the turnout displays the reverse position. The display in the simulation software must be consistent with the display of the turnout of the control console, and the turnout is tested group by group to check the turnout to show the correctness.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (7)
1. The indoor interlocking test device for computer simulation station signals comprises a simulation track circuit, a simulation annunciator lighting circuit and a simulation turnout indication circuit;
the simulation track circuit is characterized by comprising a plurality of driving modules, wherein the driving modules are connected with an upper computer through 485 buses, and the output of each driving module is connected with a field distribution board;
the analog annunciator lighting circuit comprises a plurality of acquisition modules and lighting port relays, the acquisition modules are connected with the upper computer through 485 buses, and each acquisition module is connected with the normally-open points or the normally-closed points of the lighting port relays and used for acquiring whether the port relays are electrified or not; the coil of each port relay is connected in parallel with two ends of the LED lamp, and after the LED lamp is connected with the resistor in series, two free ends of the series circuit are connected with the field equipment and used for simulating the lighting of the annunciator;
the analog turnout representation circuit also comprises a plurality of acquisition modules and a plurality of turnout port relays, wherein the acquisition modules are connected with an upper computer through 485 buses; each group of turnout port relays comprises two port relays: a first port relay and a second port relay; each acquisition module is connected with normally-open points or normally-closed points of a plurality of groups of turnout port relays and is used for acquiring whether the port relays are electrified or not; in each group of switch port relays: one end of the first port relay coil is connected with one end of the first diode, and the other end of the coil is connected with the other end of the first diode; the two ends of the first diode are also connected with a field circuit; one end of a coil of the second port relay is connected with one end of a second diode, and the other end of the coil of the second port relay is connected with the other end of the second diode; the two ends of the second diode are also connected with the field circuit.
2. The computer-simulated station signal indoor interlocking test device as claimed in claim 1, wherein: and capacitors are also connected in parallel at two ends of the series circuit of the analog signal machine lighting circuit.
3. The computer-simulated station signal indoor interlocking test device as claimed in claim 1, wherein: the driving module is a 6-channel driving module and comprises relays KA1, KA2, KA3, KA4, KA5, KA6 and a chip ULN 2003; pins 1 to 7 of the chip ULN2003 are connected with a main control chip AT89C2051 through an optocoupler TLP 521-4; pins 16 to 11 of the chip ULN2003 are connected to one ends of coils of relays KA1 to KA6, respectively; normally open contacts of the relays KA1 to KA6 are used as switches and are connected with field equipment through wiring terminals; the coil of the relay KA1 to the other end of the relay KA6 are respectively connected with + 12V.
4. The computer-simulated station signal indoor interlocking test device as claimed in claim 3, wherein: the driving module further comprises light emitting diodes D9 to D15, the positive terminals of the light emitting diodes D9 to D15 are connected to +12V, and the negative terminals of the light emitting diodes D9 to D15 are connected to pins 16 to 10 of the ULN 2003.
5. The computer-simulated station signal indoor interlocking test device as claimed in claim 1, wherein: the acquisition module comprises a main control chip AT89C2051 and an optocoupler TLP 512; the master control chip is connected with the optocoupler TLP512 and used for signal isolation; and the main control chip is connected to an upper computer through a serial port.
6. The computer-simulated station signal indoor interlocking test device as claimed in claim 5, wherein: in the analog signal machine lighting circuit, one end of a coil at the output end of the lighting port relay is connected with + VCC, and the other end of the coil at the output end of the lighting port relay is connected with an optocoupler TLP512 of the acquisition module; the main control chip in the acquisition module acquires whether the coil of the port relay is powered or not through the optocoupler TLP 512.
7. The computer-simulated station signal indoor interlocking test device as claimed in claim 5, wherein: in the analog turnout indication circuit, one ends of coils at the output ends of a first port relay and a second port relay are both connected with + VCC, and the other ends of the coils at the output ends of the first port relay and the second port relay are connected with an optocoupler TLP512 of an acquisition module; the main control chip in the acquisition module acquires whether the coil of the port relay is powered or not through the optocoupler TLP 512.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113791549A (en) * | 2021-08-17 | 2021-12-14 | 北京和利时系统工程有限公司 | Train pressure occupation simulation test system and method |
CN113899965A (en) * | 2021-09-07 | 2022-01-07 | 中铁九局集团电务工程有限公司 | Visual railway signal interlocking simulation test device |
CN114910727A (en) * | 2022-05-13 | 2022-08-16 | 中铁电气化局集团有限公司 | Double-voltage self-adaptive signal acquisition device for railway signal machine |
CN115107837A (en) * | 2022-07-14 | 2022-09-27 | 中铁武汉电气化局集团第一工程有限公司 | Single debugging system for railway open signal and turnout equipment |
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2020
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113791549A (en) * | 2021-08-17 | 2021-12-14 | 北京和利时系统工程有限公司 | Train pressure occupation simulation test system and method |
CN113791549B (en) * | 2021-08-17 | 2024-05-31 | 北京和利时系统工程有限公司 | Train occupation simulation test system and method |
CN113899965A (en) * | 2021-09-07 | 2022-01-07 | 中铁九局集团电务工程有限公司 | Visual railway signal interlocking simulation test device |
CN114910727A (en) * | 2022-05-13 | 2022-08-16 | 中铁电气化局集团有限公司 | Double-voltage self-adaptive signal acquisition device for railway signal machine |
CN115107837A (en) * | 2022-07-14 | 2022-09-27 | 中铁武汉电气化局集团第一工程有限公司 | Single debugging system for railway open signal and turnout equipment |
CN115107837B (en) * | 2022-07-14 | 2024-05-10 | 中铁武汉电气化局集团第一工程有限公司 | Single-item debugging system for railway open signal and turnout equipment |
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