Track circuit equipment marking and adjusting device

Abstract

The utility model provides a track circuit equipment calibration device which comprises a sending control device which comprises a first main control unit, a first communication unit, a carrier frequency control unit, a low frequency control unit, a power output level control unit, a transmitter clamping base and a simulation load. The transmitter clamping base is used for installing and connecting a transmitter to be tested, the first main control unit is connected with the upper control unit through the first communication unit, and the first main control unit is further electrically connected with the transmitter clamping base through the carrier frequency control unit, the low frequency control unit and the power output level control unit. The transmitter clamping base is electrically connected with the simulation load. According to the utility model, by arranging the first communication unit and enabling the first main control unit to be in communication connection with the upper control unit, control instructions and sending results can be conveniently received, and by arranging the transmitter clamping base to be connected with a transmitter to be tested, independent calibration of the transmitter can be realized, and overall simulation debugging can also be realized; the device has the advantages of simple structure and convenience in use.

Description

Technical Field

[0001] The utility model relates to the field of track circuits, in particular to a calibration device for track circuit equipment. Background Art

[0002] The ZPW-2000 type track circuit is the mainstream equipment of China's railway signals, which is divided into two major parts: indoor equipment and outdoor equipment. The indoor equipment includes transmitters, receivers, attenuators, current simulation networks, etc. The outdoor equipment includes matching transformers, resonant units, hollow coils, compensation capacitors, etc. The indoor equipment and the outdoor equipment are connected by cables to form a one-transmit-one-receive circuit. Through this track circuit, track occupancy monitoring, track signal transmission, etc. can be realized, thus ensuring the safe operation of trains.

[0003] Before the opening of a newly built line or during the renovation of an existing line, it is necessary to calibrate the transmitters, attenuators and receivers in the track circuit to ensure that the track signals meet the relevant technical requirements. The existing auxiliary calibration methods for track circuits generally conduct overall tests through simulation devices. For example, in the patent with the application date of May 12, 2020, the application number of 202020771954.3, and the name of "Intelligent Auxiliary Calibration Device for ZPW-2000 Type Track Circuit", its solution is to receive the same control signal through a simulation device and then conduct tests to compare and verify the test results with the operation results of the actual track circuit. However, the above two methods are convenient when the operation is normal, but since all the component devices are tested as a whole, once there is a problem with the operation result, it is difficult to identify the faulty device, and it is very inconvenient to use. Summary of the Invention

[0004] In order to solve the problems existing in the background art, the utility model provides a calibration device for track circuit equipment.

[0005] A calibration device for track circuit equipment includes a transmission control device. The transmission control device includes a first main control unit, a first communication unit, a carrier frequency control unit, a low-frequency control unit, a power output level control unit, a transmitter mounting base and a simulation load. The transmitter mounting base is used for installing and connecting the transmitter to be tested. The first main control unit is connected to the upper control unit through the first communication unit. The first main control unit is also electrically connected to the transmitter mounting base through the carrier frequency control unit, the low-frequency control unit and the power output level control unit respectively. The transmitter mounting base is electrically connected to the simulation load.

[0006] Based on the above, it includes a receiving control device. The receiving control device includes a second main control unit, a second communication unit, a main track level adjustment unit, a small track level adjustment unit, a receiver carrier frequency control unit, a frequency shift coding unit, an attenuator mounting base, and a receiver mounting base. The attenuator mounting base is used to mount and connect the attenuator to be tested, and the receiver mounting base is used to mount and connect the receiver to be tested. The second main control unit is connected to the first communication unit through the second communication unit. The second main control unit is electrically connected to the attenuator mounting base through the main track level adjustment unit and the small track level adjustment unit respectively. The second main control unit is electrically connected to the receiver mounting base through the receiver carrier frequency control unit. The attenuator mounting base and the receiver mounting base are electrically connected to the frequency shift coding unit respectively.

[0007] Based on the above, it includes a frequency shift acquisition unit. The frequency shift acquisition unit includes a frequency shift acquisition main control unit, a gating control circuit, and a frequency shift acquisition signal processing circuit. The frequency shift acquisition main control unit is connected to the frequency shift signal acquisition interface through the gating control circuit. The input end of the frequency shift acquisition signal processing circuit is connected to the frequency shift signal acquisition interface, the transmitter card mounting base, and the output end is connected to the frequency shift acquisition main control unit. The frequency shift signal acquisition interface is used for communication connection with the attenuator mounting base and the receiver mounting base. The frequency shift acquisition main control unit is communicatively connected to the first main control unit.

[0008] Based on the above, the first main control unit is an MCU controller. The first communication unit includes a first CAN communication unit and a WiFi module. The first main control unit is wirelessly communicatively connected to the upper control unit through the WiFi module. The first main control unit is communicatively connected to the second main control unit through the first CAN communication unit. The second main control unit is an MCU controller. The second communication unit includes a second CAN communication unit. The second main control unit is communicatively connected to the first main control unit through the second CAN communication unit.

[0009] Based on the above, the carrier frequency control unit includes a multi-channel carrier frequency control circuit. The first main control unit controls the carrier frequency of the transmitter to be tested on the transmitter card mounting base through the carrier frequency control circuit. The low-frequency control unit includes a multi-channel low-frequency control circuit. The first main control unit controls the low frequency of the transmitter to be tested on the transmitter card mounting base through the low-frequency control circuit. The output power level control unit includes a multi-channel output power level control circuit. The first main control unit controls the output power level of the transmitter to be tested on the transmitter card mounting base through the output power level control circuit.

[0010] Based on the above, the transmitter card mounting base includes a transmitter socket, and connectors electrically connected to the carrier frequency control unit, the low-frequency control unit, the output power level control unit, and the frequency shift acquisition unit are arranged in the transmitter socket.

[0011] Based on the above, it includes a frequency-shifting coding unit, which includes a frequency-shifting coding main control unit, a frequency-shifting signal generating unit, and a frequency-shifting signal amplification circuit. The frequency-shifting coding unit is communicatively connected to the first main control unit. The frequency-shifting coding unit is controllably connected to the frequency-shifting signal generating unit. The input end of the frequency-shifting signal amplification circuit receives the frequency-shifting signal of the frequency-shifting signal generating unit, and the output end is electrically connected to the attenuator mounting base and the receiver mounting base.

[0012] Based on the above, the main rail level adjustment unit includes multiple main rail level adjustment circuits. The second main control unit adjusts the main rail level of the to-be-tested attenuator on the attenuator mounting base through the main rail level adjustment circuits. The small rail level adjustment unit includes multiple small rail level adjustment circuits. The second main control unit adjusts the small rail level of the to-be-tested attenuator through the small rail level adjustment circuits. The receiver carrier frequency control unit includes multiple receiver carrier frequency control circuits. The second main control unit selects and controls the main rail carrier frequency and the small rail carrier frequency of the to-be-tested receiver on the receiver mounting base through the receiver carrier frequency control circuits.

[0013] Based on the above, the attenuator mounting base includes an attenuator socket, and connectors electrically connected to the main rail level adjustment unit, the small rail level adjustment unit, and the frequency-shifting coding unit are arranged in the attenuator socket. The receiver mounting base includes a receiver socket, and a connector electrically connected to the receiver carrier frequency control unit and the frequency-shifting coding unit is arranged in the receiver socket.

[0014] Based on the above, it includes a sending control box and a receiving control box. The sending control device is arranged in the sending control box, and the receiving control device is arranged in the receiving control box. Communication interfaces are respectively arranged on the sending control box and the receiving control box. The communication interface on the sending control box is electrically connected to the frequency-shifting acquisition unit, and the communication interface on the receiving control box is electrically connected to the second communication unit.

[0015] The utility model has substantial features and progress compared with the prior art. Specifically, by setting the first communication unit and communicatively connecting the first main control unit with the upper control unit, it is convenient to receive control instructions and send results. By setting the transmitter card mounting base to connect the to-be-tested transmitter, individual calibration and overall simulation debugging of the transmitter can be realized, and it has the advantages of simple structure and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic block diagram of the utility model.

[0017] Figure 2 is a structural schematic block diagram of the sending control device of the utility model.

[0018] Figure 3 is a circuit structure schematic diagram of the power management module of the sending control device of the utility model.

[0019] Figure 4 It is a schematic circuit diagram of the first main control unit of the present utility model.

[0020] Figure 5 It is a schematic circuit diagram of the WiFi module of the present utility model.

[0021] Figure 6 It is a schematic circuit diagram of the first CAN communication unit of the present utility model.

[0022] Figure 7 It is a schematic circuit diagram of the frequency shift acquisition main control unit of the present utility model.

[0023] Figure 8 It is a schematic circuit diagram of the carrier frequency control unit of the present utility model.

[0024] Figure 9 It is a schematic circuit diagram of the low-frequency control unit of the present utility model.

[0025] Figure 10 It is a schematic circuit diagram of the output power level control unit of the present utility model.

[0026] Figure 11 It is a schematic block diagram of the structure of the receiving control device of the present utility model.

[0027] Figure 12 It is a schematic circuit diagram of the second main control unit of the present utility model.

[0028] Figure 13 It is a schematic circuit diagram of the second CAN communication unit of the present utility model.

[0029] Figure 14 It is a schematic circuit diagram of the main track level adjustment unit of the present utility model.

[0030] Figure 15 It is a schematic circuit diagram of the small track level adjustment unit of the present utility model.

[0031] Figure 16 It is a schematic circuit diagram of the receiver carrier frequency control unit of the present utility model.

[0032] Figure 17 It is a schematic circuit diagram of the frequency shift acquisition signal processing circuit of the present utility model.

[0033] Figure 18 It is a schematic circuit diagram of the gating control circuit of the present utility model.

[0034] Figure 19 It is a schematic circuit diagram of the frequency shift coding main control unit of the present utility model.

[0035] Figure 20 It is a schematic circuit diagram of the frequency shift signal generation circuit of the present utility model.

[0036] Figure 21 It is a schematic circuit diagram of the frequency shift signal amplification circuit of the present utility model. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0038] As Figure 1 shown, a track circuit equipment calibration device includes a transmission control device and a reception control device. The transmission control device is used to receive the transmitter control instructions issued by the upper control unit such as a tablet computer through the WIFI network, and complete the adjustment control of the carrier frequency, low frequency, output power level, etc. of the transmitter according to the instructions. At the same time, the device is internally provided with a frequency shift acquisition unit to realize the automatic acquisition of the output voltage and output current of the transmitter installed on the transmission control device, and the main track input, track output 1, small track (U track) input, and track output 2 voltages of the attenuator installed on the reception control device. The reception control unit mainly receives the reception control commands issued by the tablet computer forwarded by the transmitter through the CAN bus, and completes the adjustment control of the main track level of the attenuator, the small track level, and the main track carrier frequency and small track carrier frequency of the receiver, etc.

[0039] Specifically, as Figure 2 shown, the transmission control device includes a first main control unit, a first communication unit, a carrier frequency control unit, a low frequency control unit, an output power level control unit, a transmitter card mounting base, and an analog load. The transmitter card mounting base is used to install and connect the transmitter to be tested. The first main control unit is connected to the upper control unit through the first communication unit. The first main control unit is also electrically connected to the transmitter card mounting base through the carrier frequency control unit, the low frequency control unit, and the output power level control unit respectively. The transmitter card mounting base is electrically connected to the analog load. In reality, the transmission control device also includes a power management module for converting the voltage of the power supply and providing the working voltage for each unit. The circuit of the power management module is as Figure 3 shown. The chip U166 is a power conversion chip, and the model is URB2405YMD-10WR3. In this embodiment, the first main control unit is the MCU controller U16, and the model is STM32F103VET6, as Figure 4 shown; the WIFI module is as Figure 5 shown, the first CAN communication unit is asFigure 6 As shown in the figure. The first main control unit is communicatively connected to the upper control unit such as a tablet computer through a WiFi module. The WiFi module communicates with the tablet computer through a wireless network, receives the transmitter control instructions or the attenuator and receiver control instructions sent by the tablet computer, and sends them to the first main control unit through a serial port, and receives the acquisition and measurement data uploaded by the first main control unit and sends it wirelessly to the tablet computer; the first main control unit receives the relevant control instructions sent by the tablet computer through the WIFI module. If the received instruction is a transmission control instruction, it controls the carrier frequency, low frequency, and output power level of the transmitter through the carrier frequency control unit, low frequency control unit, and output power level control unit of the device. If the received instruction is a receiver device control instruction, it is forwarded to the receiving control device through the CAN bus.

[0040] The frequency shift acquisition unit is arranged in the transmission control box and includes a frequency shift acquisition main control unit, a gating control circuit, and a frequency shift acquisition signal processing circuit. The frequency shift acquisition main control unit is connected to the frequency shift signal acquisition interface through the gating control circuit. The input end of the frequency shift acquisition signal processing circuit is connected to the frequency shift signal acquisition interface, the transmitter card mounting base, and the output end is connected to the frequency shift acquisition main control unit. The frequency shift signal acquisition interface is used for communicatively connecting the attenuator mounting base and the receiver mounting base; the frequency shift acquisition main control unit is communicatively connected to the first main control unit. In this embodiment, the frequency shift acquisition main control unit is the MCU controller U310, with the model STM32F103C8T6. As Figure 7 shown, the gating control circuit is as Figure 18 shown, and the frequency shift acquisition signal processing circuit is as Figure 17As shown, pins 12 and 13 of the frequency shift acquisition main control unit U310 are connected to the first main control unit, and the A_CAUI_K1 - A_CAUI_K5 terminals are connected to the gating control circuit. The connection of ports J29, J38, J39, J40, and J42 is selectively controlled by a triode, so as to selectively receive the collected signal categories such as output power voltage, main rail input voltage, rail output 1 voltage, U rail input voltage, rail output 2 voltage, etc. Ports J29, J38, J39, J40, and J42 are respectively frequency shift signal acquisition interfaces. Ports J29, J38, J39, J40, and J42 are respectively connected to the attenuator mounting base and the receiver mounting base in the receiving control box through external communication lines, to realize the connection and acquisition of signals such as output power voltage, main rail input voltage, rail output 1 voltage, U rail input voltage, rail output 2 voltage, etc. of the to-be-tested attenuator and receiver; the I1 and I2 terminals are used to directly connect to the transmitter card mounting base in the sending control box for collecting output power current. Ports J29, J38, J39, J40, and J42 are respectively connected to the "34" terminal at the input end of the frequency shift signal processing circuit. By gating control, a category of signal such as the main rail input signal is received. At the same time, the I1 and I2 terminals receive the output power current signal. The optocouplers U410, U510, U1010, and U1110 are gated and opto-isolated according to the control of the frequency shift acquisition main control unit. The digital switch U710 (model CD74HC4052) and the operational amplifier form a programmable operational amplifier amplification circuit for sampling and amplification. After the ADC conversion chip U610 (model ADS1271) converts the analog signal into a digital signal, it is sent to the frequency shift acquisition main control unit. The frequency shift acquisition main control unit sends the received and processed signal to the main control unit, and the main control unit then sends it to the upper control unit such as a tablet computer through the wireless communication unit.

[0041] The transmitter card mounting base includes a transmitter socket, and connectors electrically connecting the carrier frequency control unit, the low-frequency control unit, the output power level control unit, and the frequency shift acquisition unit are arranged in the transmitter socket. In this embodiment, the connectors are pin or metal contacts / contact pieces, etc., which are common connection sockets. The transmitter socket is electrically connected to multiple control units of the sending control device. After the to-be-tested transmitter is inserted into the transmitter card mounting base, the quick installation connection between the to-be-tested transmitter and the sending control device is realized. In this embodiment, the carrier frequency control unit includes a multi-channel carrier frequency control circuit, such as Figure 8As shown, the units with model TX2-5 are all relays. Terminals J2-J7 are used to connect to the transmitter socket. The first main control unit controls the on / off through the triode of the carrier frequency control circuit and the connected relay, so as to control the carrier frequency control terminal of the transmitter to be tested on the transmitter mounting base. The carrier frequency control ports of the transmitter to be tested are such as carrier frequency control terminals 1700, 2000, 2300, 2600, -1, -2, etc. For example, after applying 24V DC voltage to ports 1700 and -1 simultaneously, the transmitter generates a carrier frequency signal corresponding to 1700-1. After applying 24V DC voltage to ports 1700 and -2 simultaneously, the transmitter generates a carrier frequency signal corresponding to 1700-2. The low-frequency control unit includes multiple low-frequency control circuits, such as Figure 9 As shown, terminals J8-J9 are used to connect to the transmitter socket. The first main control unit controls through the triode of the low-frequency control circuit to control the low-frequency control terminal of the transmitter to be tested on the transmitter mounting base; ports F1-F18 of the transmitter, a total of 18 ports, are the low-frequency control terminals of the transmitter. After applying 24V DC voltage to the corresponding ports, the transmitter generates corresponding low-frequency signals. The output power level control unit includes multiple output power level control circuits, such as Figure 10 As shown, terminals J10, J48 and J49 are used to connect to the transmitter socket. The first main control unit controls through the triode of the output power level control circuit to control the output power level of the transmitter to be tested on the transmitter mounting base; ports 1-5, 9, 11, 12 of the transmitter adjust the voltage amplitude of the output signal of the transmitter. Different connection methods correspond to different output voltages. There are a total of 10 connection methods, corresponding to 10 levels. For example: when the terminals are connected to 9-11, 1-12, the corresponding output power level is level 1.

[0042] The analog load is used to cooperate to complete the transmitter function test. Transmitter function test principle: The first step: Select the carrier frequency and low frequency of the transmitter, such as 1700-1 and F1; The second step: Select the output power level of the transmitter, such as level 1; The third step: Through the frequency shift module, test whether the output power voltage, output power current, and the corresponding carrier frequency and low frequency of the transmitter are in line with the standards when the transmitter is no-load; The fourth step: Load the analog load, and through the frequency shift module, test the output power voltage and output power current of the transmitter when it is loaded, and measure whether the load-carrying capacity of the transmitter meets the standards

[0043] The receiving control device such as Figure 11As shown, the receiving control device includes a second main control unit, a second communication unit, a main track level adjustment unit, a small track level adjustment unit, a receiver carrier frequency control unit, a frequency shift coding unit, an attenuator mounting base, and a receiver mounting base. The attenuator mounting base is used to mount and connect the attenuator to be tested, and the receiver mounting base is used to mount and connect the receiver to be tested. The second main control unit is connected to the first communication unit through the second communication unit. The second main control unit is electrically connected to the attenuator mounting base through the main track level adjustment unit and the small track level adjustment unit respectively. The second main control unit is electrically connected to the receiver mounting base through the receiver carrier frequency control unit. The attenuator mounting base and the receiver mounting base are electrically connected to the frequency shift coding unit respectively. The second main control unit is the MCU controller U1, with the model number STM32F103VET6, as Figure 12 shown. The second communication unit includes a second CAN communication unit, as Figure 13 shown. The second main control unit receives the forwarded receiving control instruction through the second CAN communication unit, and controls the main track level adjustment unit to complete the adjustment of the main track level grade of the attenuator, controls the small track level adjustment unit to complete the adjustment of the small track receiving level grade of the attenuator, and controls the receiver carrier frequency control unit to complete the selection control of the main track carrier frequency and the small track carrier frequency of the receiver.

[0044] The function of the attenuator is to adjust the levels of the received main track and small track signals so that the signal amplitude meets the requirements of the receiver receiving standard, facilitating the receiver to receive and decode. The main track level adjustment unit includes multiple main track level adjustment circuits, as Figure 14 shown. U155 - U160 are 6 shift registers respectively, with the model number 74HC595D. The terminals J30 - J33 are used to connect the attenuator socket. The second main control unit adjusts the main track grade of the attenuator to be tested on the attenuator mounting base through the control of the triode of the main track level adjustment circuit. The attenuator ports a1 - a10, c3, c4 are the main track level adjustment terminals. According to different wiring methods, there are 176 levels of level adjustment. For example: when the terminals are connected to a1 - c3, a2 - c4, the corresponding main track level is level 1. The main track level adjustment unit realizes the arbitrary combination control of the 5 - group connections of the main track grade adjustment terminals a1 - a10, C3, C4 of the attenuator through 5 groups of relay groups and relay drive circuits. The small track level adjustment unit includes multiple small track level adjustment circuits, as Figure 15As shown, U73, U85, U87, U97, and U105 are respectively five shift registers, with the model number 74HC595D. Terminals J20 - J23 are used to connect to the attenuator socket. The second main control unit controls the triode of the small rail level adjustment circuit to perform small rail level adjustment on the to-be-tested attenuator. The attenuator ports a11 - a23 are small rail level adjustment terminals. According to the voltage of the small rail input, the voltage of rail output 2 is adjusted. There are approximately more than 300 types of wiring adjustment methods. For example, when the small rail input voltage is 200 mV, the terminals are connected to a11 - a12, a13 - a14, a16 - a20, a21 - a23. The adjusted rail output 2 (small rail signal) can meet the receiving requirements of the receiver. The small rail level adjustment unit realizes arbitrary combination control of the five groups of connections of the small rail level adjustment terminals a11 - a23 of the attenuator through five groups of relay sets and relay drive circuits. The receiver carrier frequency control unit includes multiple receiver carrier frequency control circuits. As Figure 16 shown, U43 and U52 are respectively two shift registers, with the model number 74HC595D. Terminals J13 - J18 are used to connect to the receiver socket. The second main control unit controls the triode of the receiver carrier frequency control circuit to select and control the main rail carrier frequency and small rail carrier frequency of the to-be-tested receiver on the receiver mounting base. The function of the receiver is to receive the adjusted track signal of the attenuator and decode the corresponding main rail signal or small rail signal according to the main rail and small rail carrier frequency decoding conditions set by itself. The main rail carrier frequency configuration ports include six ports: 1700, 2000, 2300, 2600, -1, -2. The small rail carrier frequency configuration ports include two ports: X1, X2. For example, after the main rail 1700 and -1 ports of the receiver are simultaneously loaded with 24V DC voltage, when a 1700 - 1 signal output by the attenuator is received at the ZIN terminal, the track signal decoding is realized, and other types of signals are not decoded. Similarly, if 24V DC voltage is applied to the small rail X1 terminal, the -1 type signal input to the XIN terminal of the attenuation is decoded, and the -2 type signal is not decoded. The receiver carrier frequency control unit realizes the main rail 1700, 2000, 2300, 2600, -1, -2 carrier frequency control and small rail X1, X2 carrier frequency control of the receiver main and parallel machines through two groups of 16 relays and relay drive circuits.

[0045] The attenuation device installation base includes an attenuation device socket, and connectors electrically connected to the main track level adjustment unit, the small track level adjustment unit, and the frequency shift coding unit are arranged in the attenuation device socket; the receiver installation base includes a receiver socket, and a connector electrically connected to the receiver carrier frequency control unit and the frequency shift coding unit is arranged in the receiver socket. In this embodiment, the connector is a pin or a metal contact / contact piece, etc., which is a common connection socket. The attenuation device socket is connected to the control port of the receiving control device. After the attenuation device to be tested is inserted into the attenuation device socket, the rapid installation connection between the attenuation device and the receiving control device can be realized; the receiver socket is connected to the control port of the receiving control device. After the receiver to be tested is inserted into the receiver socket, the rapid installation connection between the receiver and the receiving control device can be realized.

[0046] The frequency shift coding unit includes a frequency shift coding main control unit, a frequency shift signal generation unit, and a frequency shift signal amplification circuit. The frequency shift coding unit is communicatively connected to the first main control unit, the frequency shift coding unit is controllably connected to the frequency shift signal generation unit, the input end of the frequency shift signal amplification circuit receives the frequency shift signal of the frequency shift signal generation unit, and the output end is electrically connected to the attenuation device installation base and the receiver installation base. In this embodiment, the frequency shift coding main control unit is the MCU controller U420, and the model is C8051F022. As Figure 19 shown, in practice, it also includes a CAN communication module. The frequency shift coding main control unit U420 is communicatively connected to the first main control unit through this CAN communication module, so as to receive the forwarded control instruction. The frequency shift signal generation unit is as Figure 20 shown. The digital frequency synthesizer U520 has the model of AD9854, generates a frequency shift signal according to the control of the frequency shift coding main control unit, and conveys it to the frequency shift signal amplification circuit through the SIGNAL2 terminal. The frequency shift signal amplification circuit is as Figure 21As shown, the operational amplifier U220 is of the OPA549 model. After amplifying the input signal, the output terminal S+ is used to connect to the attenuator mounting base and the receiver mounting base. After amplifying the received frequency shift signal, it is output to the attenuator and the receiver. The frequency shift coding is used to generate a frequency shift signal with a standard amplitude for testing the functions of the attenuator and the receiver. Taking the test of one category of signals as an example (the same applies to other categories), the test principles of the attenuator and the receiver are described as follows: The first step: Generate a standard test signal with a frequency type of 1700-1 and an amplitude of 100 mV through frequency shift coding and load it onto the main track and the small track input terminals of the attenuator. The second step: Adjust the main track reception levels of the attenuator to 30 levels and 96 levels respectively, and test whether the output level of the attenuator meets the standard through the frequency shift acquisition module. The third step: Adjust the small track reception level of the attenuator according to an input of 100 mV and test whether the adjusted output voltage of the small track meets the standard. The fourth step: Generate a standard test signal with a frequency type of 1700-1 and an amplitude of 200 mV through frequency shift coding, load it onto the main track input terminal of the receiver, control the main track reception carrier frequency of the receiver to 1700-1, and test whether the main track of the receiver can be normally decoded and output. The fifth step: Generate a standard test signal with a frequency type of 1700-1 and an amplitude of 110 mV through frequency shift coding, load it onto the small track input terminal of the receiver, control the small track reception carrier frequency of the receiver to X1, and test whether the small track of the receiver can be normally decoded and output.

[0047] In reality, it includes a sending control box and a receiving control box. The sending control device is arranged in the sending control box, and the receiving control device is arranged in the receiving control box. Communication interfaces are respectively correspondingly arranged on the sending control box and the receiving control box. The communication interface on the sending control box is electrically connected to the first CAN communication unit, and the communication interface on the receiving control box is electrically connected to the second communication unit. In this embodiment, the communication interfaces correspondingly arranged on the sending control box and the receiving control box are respectively aviation sockets. The sending control box and the receiving control box are wired and communicatively connected through an aviation plug and a 12-core cable. The cable internally includes 1 pair of power supply lines, 1 pair of communication lines, and 4 pairs of signal acquisition lines. Among them, the power supply lines output DC24V from the sending control unit to the receiving control unit, the communication lines are for CAN communication connection between the sending control and the receiving control devices, and the 4 pairs of signal acquisition lines are respectively signals such as the output voltage of the receiving control device, the main track input voltage, the track output 1 voltage, the U track input voltage, and the track output 2 voltage, which are input to the frequency shift signal acquisition unit of the sending control device. After the signals acquired by the frequency shift signal acquisition unit are sent to the first main control unit, the first main control unit forwards them to the tablet computer through the WiFi module.

[0048] This set of devices in this embodiment not only realizes the individual calibration and adjustment such as the automatic control and adjustment of the states of the ZPW2000 track circuit transmitter, attenuator, and receiver, but also can be simulated as a whole and compared with the test results of the actual track circuit, realizing the function and technical index test of the ZPW2000 track circuit equipment. It can not only meet the calibration of the ZPW2000 track circuit, but also be used as a portable detection device for the ZPW2000 track circuit equipment, which is flexible and convenient to use. In addition, through the split-type and modular design of the whole set of devices, the device body has the advantages of light weight and convenient carrying. Furthermore, based on the principle of the ZPW-2000 track circuit, this set of devices is designed as two independent control devices, namely a transmission control device and a reception control device, so that the transmitter of the transmission unit is completely isolated from the attenuator and receiver of the reception unit in space, avoiding the interference and influence of the high voltage and large current of the transmitter on the weak signal of the reception part.

[0049] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A track circuit equipment calibration device, characterized in that: It includes a sending control device, which includes a first main control unit, a first communication unit, a carrier frequency control unit, a low frequency control unit, a power output level control unit, a transmitter card-mounted base and a simulated load. The transmitter card-mounted base is used to install and connect the transmitter to be tested. The first main control unit is connected to the upper control unit through the first communication unit. The first main control unit is also electrically connected to the transmitter card-mounted base through the carrier frequency control unit, the low frequency control unit and the power output level control unit respectively, and the transmitter card-mounted base is electrically connected to the simulated load.

2. The track circuit equipment calibration device according to claim 1, characterized in that: The invention comprises a receiving control device, which comprises a second main control unit, a second communication unit, a main track level adjustment unit, a small track level adjustment unit, a receiver carrier frequency control unit, a frequency shifting coding unit, an attenuator mounting base and a receiver mounting base. The attenuator mounting base is used for mounting and connecting the attenuator to be tested, and the receiver mounting base is used for mounting and connecting the receiver to be tested. The second main control unit is connected to the first communication unit through the second communication unit, the second main control unit is electrically connected to the attenuator mounting base through the main track level adjustment unit and the small track level adjustment unit respectively, and the second main control unit is electrically connected to the receiver mounting base through the receiver carrier frequency control unit; the attenuator mounting base and the receiver mounting base are electrically connected to the frequency shifting coding unit respectively.

3. The track circuit equipment calibration device according to claim 2, characterized in that: It includes a frequency shift acquisition unit, which includes a frequency shift acquisition main control unit, a gating control circuit and a frequency shift acquisition signal processing circuit. The frequency shift acquisition main control unit is connected to a frequency shift signal acquisition interface through the gating control circuit control. The input end of the frequency shift acquisition signal processing circuit is connected to the frequency shift signal acquisition interface and a transmitter card-mounted base, and the output end is connected to the frequency shift acquisition main control unit. The frequency shift signal acquisition interface is used for communication connection with an attenuator mounting base and a receiver mounting base; the frequency shift acquisition main control unit is communicatively connected to the first main control unit.

4. The track circuit equipment calibration device according to claim 2, characterized in that: The first main control unit is an MCU controller, the first communication unit includes a first CAN communication unit and a WiFi module, the first main control unit is connected to the upper control unit through wireless communication of the WiFi module, and the first main control unit is connected to the second main control unit through the first CAN communication unit; the second main control unit is an MCU controller, the second communication unit includes a second CAN communication unit, and the second main control unit is connected to the first main control unit through the second CAN communication unit.

5. The track circuit equipment calibration device according to claim 1, characterized in that: The carrier frequency control unit includes multiple carrier frequency control circuits, and the first main control unit controls the carrier frequency of the transmitter under test on the transmitter card-mounted base through the carrier frequency control circuit; the low frequency control unit includes multiple low frequency control circuits, and the first main control unit controls the low frequency of the transmitter under test on the transmitter card-mounted base through the low frequency control circuit; the power output level control unit includes multiple power output level control circuits, and the first main control unit controls the power output level of the transmitter under test on the transmitter card-mounted base through the power output level control circuit.

6. The track circuit equipment calibration device according to claim 1, characterized in that: The transmitter card-mounted base comprises a transmitter socket, in which connectors electrically connected to the carrier frequency control unit, the low frequency control unit, the power output level control unit and the frequency shift acquisition unit are arranged.

7. The track circuit equipment calibration device according to claim 2, characterized in that: It includes a frequency shift code sending unit, which includes a frequency shift code sending main control unit, a frequency shift signal generating unit and a frequency shift signal amplifying circuit. The frequency shift code sending unit is communicatively connected to the first main control unit, the frequency shift code sending unit is controlled to be connected to the frequency shift signal generating unit, the input end of the frequency shift signal amplifying circuit receives the frequency shift signal of the frequency shift signal generating unit and the output end is electrically connected to the attenuator mounting base and the receiver mounting base.

8. The track circuit equipment calibration device according to claim 2, characterized in that: The main rail level adjustment unit includes multiple main rail level adjustment circuits, and the second main control unit adjusts the main rail level of the attenuator to be tested on the attenuator installation base through the main rail level adjustment circuit; the small rail level adjustment unit includes multiple small rail level adjustment circuits, and the second main control unit adjusts the small rail level of the attenuator to be tested through the small rail level adjustment circuit; The receiver carrier frequency control unit includes a multi-channel receiver carrier frequency control circuit. The second main control unit selects and controls the main track carrier frequency and the small track carrier frequency of the receiver to be tested on the receiver mounting base through the receiver carrier frequency control circuit.

9. The track circuit equipment calibration device according to claim 2, characterized in that: The attenuator mounting base includes an attenuator socket, in which are arranged connectors electrically connected to the main track level adjustment unit, the small track level adjustment unit and the frequency shift coding unit respectively; the receiver mounting base includes a receiver socket, in which are arranged connectors electrically connected to the receiver carrier frequency control unit and the frequency shift coding unit.

10. The track circuit equipment calibration device according to claim 3, characterized in that: It includes a sending control box and a receiving control box, the sending control device is arranged in the sending control box, the receiving control device is arranged in the receiving control box, communication interfaces are respectively arranged on the sending control box and the receiving control box, the communication interface on the sending control box is electrically connected to the frequency shift acquisition unit, and the communication interface on the receiving control box is electrically connected to the second communication unit.

Images