A station coding transmitter

Abstract

The present invention relates to a station coding transmitter, comprising a first channel, a second channel, a third channel and a logic control unit connected to each other. The first channel and the second channel in the present invention respectively judge whether the channel signals received by themselves are collected correctly and perform mutual calibration, and then the logic control unit controls the output of the coding signal according to the judgment result and the mutual calibration result, thereby ensuring the safe output of the coding transmitter, and can send highly stable and high-precision coding signals to the track.

Description

Technical Field

[0001] The invention relates to the field of track signal equipment, and in particular to a station coding transmitter. Background Art

[0002] As a transmitting device, the main function of the coded transmitter is to send coded signals to the track. It is suitable for the 2000 type non-insulated frequency-shift automatic block and station coding system in non-electrified and electrified sections for automatic blocking, locomotive signals and overspeed protection. The stability and accuracy of the coded signals sent by the existing coded transmitters are poor, and the reliability is low, which brings safety risks to the personnel and equipment of the station. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a station coding transmitter.

[0004] The technical solution of the present invention to solve the above technical problem is as follows: a station coding transmitter comprises a first channel, a second channel, a third channel and a logic control unit connected to each other;

[0005] The first channel is used to receive a first channel signal and send it to the second channel, and is also used to judge whether the first channel signal is correctly collected, generate a first judgment result and send it to the logic control unit, and is also used to verify the second channel signal input by the second channel, generate a first mutual verification result and send it to the logic control unit;

[0006] The second channel is used to receive the second channel signal and send it to the first channel, and is also used to judge whether the second channel signal is correctly collected, generate a second judgment result and send it to the logic control unit, and is also used to verify the first channel signal, generate a second mutual verification result and send it to the logic control unit;

[0007] The third channel is used to receive the input level selection signal and process the encoding conditions input by the encoding condition collector and then send them to the first channel and the second channel respectively;

[0008] The logic control unit is used to control its own action according to the first judgment result, the first mutual calibration result, the second judgment result and the second mutual calibration result, so as to control the output of the coded signal.

[0009] The beneficial effects of the present invention are as follows: the first channel and the second channel respectively judge whether the acquisition of the channel signals they receive is correct and perform mutual calibration, and then the logic control unit controls the output of the coded signal according to the judgment result and the mutual calibration result, thereby ensuring the safe output of the coded transmitter, and being able to send highly stable and high-precision coded signals to the track. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A functional block diagram of a station coding transmitter provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0011] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0012] Figure 1 A block diagram of a station coding transmitter provided by an embodiment of the present invention, such as Figure 1 As shown, the transmitter consists of channel 1, channel 2, channel 3, and a logic control unit. Among them, channel 1 and channel 2 are the signal detection channels of this transmitter; channel 3 is the FSK signal generation channel of this transmitter; the logic control unit includes a control AND gate and a safety AND gate module; the specific descriptions are as follows:

[0013] (1) Channel 1 consists of three parts: encoding optocoupler isolation input 1 module, AD acquisition signal conditioning 1 module, and DSP data processing 1 module. The specific functions of the modules are as follows:

[0014] 1) Coding optocoupler isolation input 1 module: DSP data processing 1 module controls the coding condition input through the isolation optocoupler circuit, and the coding condition is input into the DSP data processing 1 module after optocoupler isolation;

[0015] 2) AD signal conditioning module 1: collects two analog signals, the FSK small signal generated by the FPGA FSK signal generation module 3 and the FSK power amplifier signal generated by the FSK power amplifier module 3, and converts them into digital signals and sends them to the DSP data processing module 1;

[0016] 3) DSP data processing 1 module: control and read the coding condition information sent by the coding optocoupler isolation input 1 module; receive and process the FSK small signal and FSK power amplifier signal sent by the AD acquisition signal conditioning 1 module; send the coding condition, FSK small signal and FSK power amplifier acquisition information to the DSP data processing 2 module, and receive the same information from the other party to complete the mutual calibration of the dual DSPs; drive the control AND gate and the safety AND gate to act according to the signal acquisition processing and mutual calibration results: if the coding condition, FSK small signal and FSK power amplifier signal are acquired correctly and the dual DSP mutual calibration results are correct, drive the control AND gate and the safety AND gate to open, otherwise close.

[0017] (2) Channel 2 consists of three parts: encoding optocoupler isolation input 2 module, AD acquisition signal conditioning 2 module, and DSP data processing 2 module. The specific functions of the modules are as follows:

[0018] 1) Coding optocoupler isolation input 2 module: DSP data processing 2 module controls the coding condition input through the isolation optocoupler circuit, and the coding condition is input into the DSP data processing 2 module after optocoupler isolation;

[0019] 2) AD signal conditioning module 2: collects two analog signals, the FSK small signal generated by the FPGA FSK signal generation module 3 and the FSK power amplifier signal generated by the FSK power amplifier module 3, and converts them into digital signals and sends them to the DSP data processing module 2;

[0020] 3) DSP data processing 2 module: control and read the coding condition information sent by the coding optocoupler isolation input 2 module; receive and process the FSK small signal and FSK power amplifier signal sent by the AD acquisition signal conditioning 2 module; send the coding condition, FSK small signal and FSK power amplifier acquisition information to the DSP data processing 1 module, and receive the same information from the other party to complete the mutual calibration of the dual DSPs; drive the control AND gate and the safety AND gate to act according to the signal acquisition processing and mutual calibration results: if the coding condition, FSK small signal and FSK power amplifier signal are acquired correctly and the dual DSP mutual calibration results are correct, drive the control AND gate and the safety AND gate to open, otherwise close.

[0021] (3) Channel 3 consists of 4 parts: encoding optocoupler isolation input 3 module, FPGA FSK signal generation 3 module, filter 3 module, and FSK power amplifier 3 module. The specific functions of the modules are as follows:

[0022] 1) Coding optocoupler isolation input 3 module: FPGA controls the coding condition input through the isolation optocoupler circuit, and the coding condition is input into the FPGA to generate FSK signal 3 module after optocoupler isolation;

[0023] 2) FPGA generates FSK signal 3 module: collects the coding information sent by the coding optical coupler isolation input 3 module, and generates FSK small signal according to the coding information. The FSK small signal is sent to the filter 3 module on the one hand, and is also provided for the AD recovery conditioning 1 module and the AD recovery conditioning 2 module to recover;

[0024] 3) Filter 3 module: Filters and conditions the FSK small signal sent by the FPGA FSK signal generation 3 module, converts it into an analog signal and sends it to the FSK power amplifier 3 module;

[0025] 4) FSK power amplifier 3 module: On the one hand, it amplifies the analog signal sent by the filter 3 module and outputs the FSK power amplifier signal, and sends the FSK power amplifier signal to the AD recovery conditioning 1 module and the AD recovery conditioning 2 module for recovery.

[0026] (4) The logic control unit includes a control AND gate module and a safety AND gate module, which act as switches. The specific functions of the modules are as follows:

[0027] 1) Control AND gate module: Receives control AND gate control signals from DSP data processing module 1 and DSP data processing module 2, and controls the opening and closing of the switch channel from filter module 3 to FSK power amplifier module 3 according to the control signals;

[0028] 2) Safety AND gate module: Receives the safety AND gate control signals from the DSP data processing module 1 and the DSP data processing module 2, controls the drive output of the relay according to the control signal, and thus determines whether to direct it to the backup transmitter.

[0029] (5) The coding conditions and level selection in the figure are configured externally, and the relay is an external device.

[0030] This transmitter has the following advantages and positive effects:

[0031] advantage:

[0032] (1) Fail-safe principle: When the detection channel coding condition acquisition, FSK small signal acquisition, FSK power amplifier signal acquisition, and dual-channel mutual calibration result are wrong, the execution control and door closing coded signal output and the safety and door closing guide standby transmitter are all guided to the safety side.

[0033] (2) 2-out-of-2 design: Channel 1 and Channel 2 are signal detection channels. When any detection channel detects an error, the transmitter executes the output shutdown action.

[0034] (3) Strong data processing capability: Channel 1 and Channel 2 are designed with DSP chips, which have strong computing power, fast speed and high detection accuracy.

[0035] (4) High FSK signal production accuracy: Channel 3 adopts FPGA chip design, and the signal synthesis accuracy is high.

[0036] Positive effects:

[0037] (1) Technical benefits

[0038] The dual safety control of control AND door and safety AND door is adopted to ensure the safe output of the transmitter, and can send highly stable and high-precision coded signals to the track.

[0039] The signal detection channel adopts a 2-out-of-2 design. When any of the detection channel coding condition acquisition, FSK small signal acquisition, FSK power amplifier signal acquisition or dual-channel mutual calibration results are wrong, the execution control and door closing coded signal output and the safety and door closing guide standby transmitter are all directed to the safety side.

[0040] (2) Economic Benefits

[0041] Since it is an electronic product, it is profitable and has considerable economic benefits.

[0042] (3) Social benefits

[0043] The present invention has high safety while ensuring reliability, thereby reducing the safety risks to personnel and equipment caused by such products.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A station coding transmitter, characterized in that: It includes a first channel, a second channel, a third channel and a logic control unit which are connected to each other; The first channel is used to receive a first channel signal and send it to the second channel, and is also used to judge whether the first channel signal is correctly collected, generate a first judgment result and send it to the logic control unit, and is also used to verify the second channel signal input by the second channel, generate a first mutual verification result and send it to the logic control unit; The second channel is used to receive the second channel signal and send it to the first channel, and is also used to judge whether the second channel signal is correctly collected, generate a second judgment result and send it to the logic control unit, and is also used to verify the first channel signal, generate a second mutual verification result and send it to the logic control unit; The third channel is used to receive the input level selection signal and process the encoding conditions input by the encoding condition collector and then send them to the first channel and the second channel respectively; The logic control unit is used to control its own action according to the first judgment result, the first mutual calibration result, the second judgment result and the second mutual calibration result, so as to control the output of the coded signal.

2. A station coding transmitter according to claim 1, characterized in that: The third channel is specifically used to receive the input level selection signal and process the coding conditions input by the coding condition collector, generate an FSK small signal and send it to the first channel and the second channel, and is also used to process the FSK small signal, generate an FSK power amplifier signal and send it to the first channel and the second channel respectively.

3. A station coding transmitter according to claim 1 or 2, characterized in that: The first channel includes a first coding optocoupler isolation input module, a first AD recovery signal conditioning module and a first DSP data processing module; the second channel includes a second coding optocoupler isolation input module, a second AD recovery signal conditioning module and a second DSP data processing module; the third channel includes a third coding optocoupler isolation input module, an FSK signal generating module, a filtering module and an FSK power amplifier module; the logic control unit includes a control AND gate and a safety AND gate; The first coding optocoupler isolation input module is connected to the first AD recovery signal conditioning module through the first DSP data processing module, the second coding optocoupler isolation input module is connected to the second AD recovery signal conditioning module through the second DSP data processing module, the first DSP data processing module and the second DSP data processing module are both connected to the safety AND gate and the control AND gate and are connected to each other, the third coding optocoupler isolation input module is connected to the FSK signal generating module, the filtering module, the control AND gate and the FSK power amplifier module, the FSK power amplifier module has an input end for receiving a level selection signal and is respectively connected to the first AD recovery signal conditioning module and the second AD recovery signal conditioning module; The first coding optocoupler isolation input module and the second coding optocoupler isolation input module are respectively used to perform optocoupler isolation on the received coding conditions and then send them to the first DSP data processing module and the second DSP data processing module; The first AD signal conditioning module and the second AD signal conditioning module are used to collect two analog signals, the FSK small signal generated by the FSK signal module and the FSK power amplifier signal generated by the FSK power amplifier module, respectively, and convert them into digital signals and then send them to the first DSP data processing module and the second DSP data processing module; The first DSP data processing module is used to receive the first channel signal including the encoding conditions isolated by optical coupling and the FSK small signal and FSK power amplifier signal converted into digital signals and send it to the second DSP data processing module, and is also used to judge whether the first channel signal is collected correctly, generate a first judgment result and send it to the safety AND gate and the control AND gate, and is also used to verify the second channel signal including the encoding conditions isolated by optical coupling and the FSK small signal and FSK power amplifier signal converted into digital signals input by the second DSP data processing module, generate a first mutual verification result and send it to the safety AND gate and the control AND gate; The second DSP data processing module is used to receive the second channel signal and send it to the first DSP data processing module, and is also used to judge whether the second channel signal is correctly collected, generate a second judgment result and send it to the safety AND gate and the control AND gate, and is also used to verify the first channel signal, generate a second mutual verification result and send it to the safety AND gate and the control AND gate; The safety AND gate and the control AND gate are used to control their own actions according to the first judgment result, the first mutual calibration result, the second judgment result, and the second mutual calibration result; The third encoding optical coupling isolation input module is used for optically isolating the received encoding conditions and then sending them to the FSK signal generating module; The FSK signal generating module is used to generate a small FSK signal according to the received encoding condition after optical coupling isolation and send it to the filtering module, the first AD return signal conditioning module and the second AD return signal conditioning module respectively; The filtering module is used to filter and condition the FSK small signal, convert it into an analog signal, and send it to the FSK power amplifier module; The FSK power amplifier module is used to amplify and output the analog signal sent by the filter module and send it to the first AD return signal conditioning module and the second AD return signal conditioning module respectively.

4. A station coding transmitter according to claim 3, characterized in that: The safety AND door and control AND door are specifically used for: When the first judgment result, the first mutual calibration result, the second judgment result and the second mutual calibration result are all correct, the driver itself is turned on, otherwise it is turned off.

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