Phase-Sensitive Orbit Receiver

Abstract

The utility model relates to a phase-sensitive track receiver, including a track signal sampling circuit, a local signal sampling circuit, a processing circuit, a drive output circuit and a display circuit; the output end of the track signal sampling circuit and the output end of the local signal sampling circuit are connected to the input end of the processing circuit, and the output end of the processing circuit is respectively connected to the input end of the display circuit and the drive output circuit; the utility model is provided with a processing circuit to sample the input analog signal and digital pulse signal and calculate the voltage amplitude and phase angle, and can also output a logic signal, and the drive output circuit determines whether to output the drive signal of the drive relay according to the logic signal, and can also display the track voltage amplitude and phase angle through the display circuit. The present application can display the track voltage amplitude and phase angle in real time, which is beneficial to the adjustment of the track circuit; it can also determine the drive signal of the drive relay according to the logic signal, which greatly improves the reliability and anti-interference ability of the track circuit.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway signal systems, and in particular relates to a phase-sensitive track receiver. Background Art

[0002] The quality of track circuits directly affects the operational safety of railways and the traffic order. The function of track receivers is to detect the occupied and idle states of track circuits. If the operation is unstable, it will cause other track circuit faults such as the red light band of the track circuit, which will cause the normal running trains to slow down or even emergency brake, endangering the driving safety and disrupting the traffic order. Passenger trains will be delayed, causing immeasurable losses and leading to adverse social impacts such as passenger detention.

[0003] At present, the track receivers used in China all use single-chip microcomputers to process information, and use a boost method to sample and process the input signal. Although the signal strength is improved, it is not conducive to preventing the input high voltage from damaging the receiver. In addition, the existing receivers cannot display the track voltage value, phase angle and other parameters in real time. The existing receivers use the method of capacitor charging and discharging to generate measurement pulses for the track voltage, and rely on the statistics of the number of pulse inputs to judge the input voltage value. They are easily affected by the characteristic parameters of electronic components, and there are individual differences during production, so manual debugging of the receiving sensitivity is required. When using measurement pulses to calculate the phase angle, it is easily affected by the differences in the performance parameters of devices such as capacitors and resistors, resulting in large phase angle measurement errors and poor anti-interference performance; when there is a large 50Hz voltage interference in the 25Hz signal, the waveform is distorted, which will cause a large measurement error. Therefore, the existing receivers cannot accurately measure the phase angle, let alone cut off the output drive when the phase angle exceeds the specified range to achieve the drop of the track relay.

[0004] In summary, the existing track receivers are unable to monitor the track voltage and phase angle in real time, and the phase angle measurement error is large, resulting in the problem of low stability of the track receiver. Utility Model Content

[0005] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a phase-sensitive track receiver to solve the problem of low stability of the existing track receiver.

[0006] To achieve the above objectives, the utility model adopts the following technical solutions: a phase-sensitive track receiver, comprising: a track signal sampling circuit, a local signal sampling circuit, a processing circuit, a drive output circuit and a display circuit;

[0007] The output end of the track signal sampling circuit and the output end of the local signal sampling circuit are respectively connected to the input end of the processing circuit, and the output end of the processing circuit is respectively connected to the input end of the display circuit and the drive output circuit;

[0008] The track signal sampling circuit is used to collect the track pulse signal and the track analog voltage signal obtained by converting the track signal;

[0009] The local signal sampling circuit is used to collect the local pulse signal obtained according to the local signal conversion;

[0010] The processing circuit is used to calculate the track voltage amplitude according to the track simulation voltage signal, and calculate the phase angle according to the track pulse signal and the local pulse signal, and generate a logic signal according to the track voltage amplitude and the track phase angle; the phase angle is the phase difference between the track signal and the local signal;

[0011] The drive output circuit is used to output a drive signal according to the logic signal; the drive signal is used to drive a relay connected to the phase-sensitive track receiver;

[0012] The display circuit is used for displaying the track voltage amplitude and the track phase angle.

[0013] Furthermore, it also includes:

[0014] an output detection circuit, configured to generate an alarm signal when the processing circuit generates a logic signal but the drive output circuit does not receive the logic signal, and feed the alarm signal back to the drive output circuit;

[0015] One end of the output detection circuit is connected to the driving output circuit, and the other end of the output detection circuit is connected to the processing circuit.

[0016] Furthermore, it also includes:

[0017] An alarm circuit, used for giving an alarm according to an alarm signal;

[0018] The alarm circuit is connected to the drive output circuit.

[0019] Furthermore, it also includes:

[0020] Track input isolation circuit, used for electromagnetically isolating the received track signal;

[0021] A local input isolation circuit is used to perform electromagnetic isolation on the received local signal;

[0022] The output end of the track input isolation circuit is connected to the input end of the track signal sampling circuit, and the output end of the local input isolation circuit is connected to the input end of the local signal sampling circuit.

[0023] Furthermore, it also includes:

[0024] Track filter circuit, used for filtering track signals;

[0025] A local filtering circuit, used for filtering local signals;

[0026] The input end of the track filter circuit is connected to the output end of the track signal sampling circuit, and the output end thereof is connected to the processing circuit;

[0027] The input end of the local filtering circuit is connected to the output end of the local signal sampling circuit, and the output end thereof is connected to the processing circuit.

[0028] Furthermore, it also includes:

[0029] Track input lightning protection circuit, used to protect the track from input lightning and surge;

[0030] The input end of the track input lightning protection circuit is connected to the track voltage output circuit, and the output end thereof is connected to the input end of the track signal sampling circuit.

[0031] Furthermore, it also includes:

[0032] a power supply circuit, used for providing electrical energy to the processing circuit;

[0033] The power supply circuit is connected to the processing circuit.

[0034] Furthermore, it also includes:

[0035] Anti-reverse connection circuit, used to disconnect the power circuit when the power is reversely connected;

[0036] The input end of the anti-reverse connection circuit is connected to the output end of the power supply circuit, and the output end of the anti-reverse connection circuit is connected to the input end of the processing circuit.

[0037] Furthermore, the display circuit includes:

[0038] Digital display for showing rail voltage amplitude and phase angle.

[0039] Furthermore, the processing circuit adopts a single chip microcomputer.

[0040] The single chip microcomputer adopts DSP chip.

[0041] The utility model adopts the above technical solution, and the beneficial effects that can be achieved include:

[0042] A phase-sensitive track receiver provided in an embodiment of the present application implements sampling of track pulse signals and analog voltage signals after track signal conversion through a track signal sampling circuit, and implements sampling of local pulse signals after local signal conversion through a local signal sampling circuit. The processing circuit calculates the track voltage amplitude according to the track analog voltage signal, and can also calculate the phase angle according to the track pulse signal and the local pulse signal, thereby generating a logic signal. The display circuit can display the track voltage amplitude and phase angle, and the drive output circuit outputs a drive signal according to the logic signal to drive a relay connected to the phase-sensitive track receiver. The phase-sensitive track receiver provided in the present application greatly improves the reliability and anti-interference ability of the track circuit. The phase-sensitive track receiver can realize real-time online measurement of the track voltage and phase angle of the receiver, which is beneficial to the adjustment of the track circuit, improves the efficiency of operation and maintenance, reduces the labor intensity of maintenance personnel, ensures the safe and punctual arrival of the railway, and safeguards the safety of railway transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 The structure of a phase-sensitive track receiver of the utility model is shown in FIG. Figure 1 ;

[0045] Figure 2 The structure of a phase-sensitive track receiver of the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0047] A specific phase-sensitive orbit receiver provided in an embodiment of the present application is introduced below in conjunction with the accompanying drawings.

[0048] like Figure 1 and Figure 2As shown, the utility model provides a phase-sensitive track receiver, comprising: a track signal sampling circuit 1, a local signal sampling circuit 2, a processing circuit 3, a drive output circuit 4 and a display circuit 5;

[0049] The output end of the track signal sampling circuit 1 and the output end of the local signal sampling circuit 2 are respectively connected to the input end of the processing circuit 3, and the output end of the processing circuit 3 is respectively connected to the input end of the display circuit 5 and the drive output circuit 4;

[0050] The track signal sampling circuit 1 is used to collect the track pulse signal and the track analog voltage signal obtained by the track signal conversion;

[0051] The local signal sampling circuit 2 is used to collect the local pulse signal obtained according to the local signal conversion;

[0052] The processing circuit 3 is used to calculate the track voltage amplitude according to the track simulation voltage signal, and calculate the phase angle according to the track pulse signal and the local pulse signal, and generate a logic signal according to the track voltage amplitude and the track phase angle; the phase angle is the phase difference between the track signal and the local signal;

[0053] The drive output circuit 4 is used to output a drive signal according to the logic signal; the drive signal is used to drive a relay connected to the phase-sensitive track receiver;

[0054] The display circuit 5 is used to display the track voltage amplitude and the track phase angle.

[0055] Specifically, the track signal sampling circuit 1 provided in the present application utilizes the sampling zero-crossing technology and the signal generated by the zero-crossing to generate a track pulse signal consistent with the input track signal, that is, when the track pulse signal is in the positive half cycle, a high-level signal is generated, and when the track voltage is in the negative half cycle, a low-level signal is generated. The track signal AC frequency can be calculated by sampling the rising edge and the falling edge of the pulse. The track signal sampling circuit 1 of the present application adopts a method of capturing the pulse edge. If there is no pulse edge, the sampling process cannot be realized, thereby realizing reliable detection of the input track signal. In addition, the zero-crossing signal in the present application also generates an analog voltage signal that changes proportionally with the input track signal voltage value. By sampling this voltage value, the effective value of the voltage of the input track signal at this time can be calculated, that is, the track signal sampling circuit 1 provided in the present application generates two sampling signals, namely the track pulse signal and the track analog voltage signal.

[0056] The local signal sampling circuit 2 provided in the present application is used to implement sampling of the local pulse signal after the local signal is converted. In the present application, due to the volume limitation of the circuit board, only the pulse moment sampling of the local signal is implemented.

[0057] The processing circuit 3 provided in the present application adopts a single chip microcomputer, which converts the input 25Hz track pulse signal and the local pulse signal into digital signals through an analog-to-digital converter, analyzes and processes the converted digital signals, calculates the amplitude of the 25Hz signal input by the track and the phase difference between the track signal and the local signal, and displays the calculation result through the display circuit 5 after the calculation by the single chip microcomputer, and then sends the calculation result to the drive output circuit 4;

[0058] The drive output circuit 4 is periodically turned on and off according to the logic signal of the operation result, realizes DC / DC power conversion, and outputs the drive relay signal. It should be noted that in the present application, the drive output circuit 4 can only be turned on and off to realize DC / DC power conversion and output the drive relay signal when the logic signal received is an alternating pulse signal. This ensures that when the microcontroller pin is in an out-of-control state, it is always in a cut-off state and cannot output the drive relay signal.

[0059] The display circuit 5 is used to display the working status of the receiver itself and the occupied and idle status of the track section processed by the receiver, and to display the phase difference between the track signal and the local signal, that is, the phase angle, and the effective value of the track voltage, that is, the track voltage amplitude.

[0060] The present application provides a phase-sensitive track receiver, which samples the track pulse signal and analog voltage signal after the track signal is converted through a track signal sampling circuit 1, and samples the local pulse signal after the local signal is converted through a local signal sampling circuit 2. The processing circuit 3 calculates the track voltage amplitude according to the track analog voltage signal, and can also calculate the phase angle according to the track pulse signal and the local pulse signal to generate a logic signal. The display circuit 5 can display the track voltage amplitude and phase angle. The drive output circuit 4 outputs a drive signal according to the logic signal to drive a relay connected to the phase-sensitive track receiver.

[0061] The phase-sensitive track receiver provided in the present application greatly improves the reliability and anti-interference capability of the track circuit. The phase-sensitive track receiver can realize real-time online measurement of the receiver's track voltage and phase angle, which is beneficial to the adjustment of the track circuit, improves operation and maintenance efficiency, reduces the labor intensity of maintenance personnel, ensures the safe and punctual arrival of the railway, and safeguards the safety of railway transportation.

[0062] In some optional embodiments, the phase-sensitive orbit receiver provided by the present application further includes:

[0063] an output detection circuit 6, configured to generate an alarm signal when the processing circuit 3 generates a logic signal but the drive output circuit 4 does not receive the logic signal, and feed the alarm signal back to the drive output circuit 4;

[0064] One end of the output detection circuit 6 is connected to the driving output circuit 4 , and the other end of the output detection circuit 6 is connected to the processing circuit 3 .

[0065] Specifically, the output detection circuit 6 in the present application can obtain the logic signal output by the microcontroller, and can also determine whether the drive output circuit 4 receives the logic signal. If the output detection circuit 6 detects that the microcontroller outputs a logic signal, but the drive output circuit 4 does not receive the logic signal, it means that the microcontroller has a fault, and the output detection circuit 6 generates an alarm signal; it should be noted that the drive output circuit 4 in the present application adopts a guided safety design. When the microcontroller fails, the drive relay signal cannot be output regardless of whether the output pin is in a high level state or a low level state.

[0066] In some optional embodiments, the phase-sensitive orbit receiver provided by the present application further includes:

[0067] Alarm circuit 7, used for giving an alarm according to the alarm signal;

[0068] The alarm circuit 7 is connected to the drive output circuit 4 .

[0069] Specifically, in the present application, after the output detection circuit 6 generates an alarm signal, it is fed back to the drive output circuit 4, and the drive output circuit 4 outputs the alarm signal to the alarm circuit 7, and the alarm circuit 7 generates an alarm.

[0070] The present application uses an output detection circuit 6 to detect whether the DC drive output by the receiver is working normally. The drive output signal is fed back to the input pin of the single-chip microcomputer, and it can be judged whether the current logic signal has taken effect based on this feedback signal. If the single-chip microcomputer has generated a logic signal as a control output signal, but the drive output end cannot detect the logic signal, the output detection circuit 6 generates an alarm signal and feeds it back to the drive output circuit 4, and the drive output circuit 4 sends the alarm signal to the alarm circuit 7 for alarm processing. Thereby ensuring that when the single-chip microcomputer is interfered with and freezes or has no output signal, the drive signal of the output drive relay is cut off, thereby realizing fault safety guidance. Through the alarm, the staff is notified in time to detect and process the phase-sensitive track receiver to ensure the normal operation of the track.

[0071] In some optional embodiments, the phase-sensitive orbit receiver provided by the present application further includes:

[0072] A track input isolation circuit (not shown in the figure), used for electromagnetically isolating the received track signal;

[0073] A local input isolation circuit (not shown in the figure) is used to perform electromagnetic isolation on the received local signal;

[0074] The output end of the track input isolation circuit is connected to the input end of the track signal sampling circuit 1 , and the output end of the local input isolation circuit is connected to the input end of the local signal sampling circuit 2 .

[0075] Specifically, in the present application, the track input isolation circuit electromagnetically isolates the received track signal, and the local input isolation circuit electromagnetically isolates the received local signal. It can be understood that both the track input isolation circuit and the local input isolation circuit are provided with an isolation transformer. The isolation transformer electromagnetically isolates the track signal and the local signal from the processing circuit 3. The isolation transformer adopts a step-down method. When the input signal has a large impact or interference, it is attenuated by the isolation transformer, and the signal loaded on the processing circuit 3 will be attenuated, thereby protecting the processing circuit 3.

[0076] The track signal and local signal after the isolation transformer use zero-crossing technology to generate two pulse signals respectively, which are input to the microcontroller pin with input capture function, so that the occurrence time of the rising edge or falling edge of the signal can be collected. According to the capture time interval, the time interval between the track signal and the local signal is calculated, and the corresponding phase angle information is deduced through the time interval.

[0077] In some optional embodiments, the phase-sensitive orbit receiver provided by the present application further includes:

[0078] Track filter circuit (not shown in the figure), used for filtering the track signal;

[0079] A local filtering circuit (not shown in the figure) is used to filter the local signal;

[0080] The input end of the track filter circuit is connected to the output end of the track signal sampling circuit 1, and the output end thereof is connected to the processing circuit 3;

[0081] The input end of the local filtering circuit is connected to the output end of the local signal sampling circuit 2 , and the output end thereof is connected to the processing circuit 3 .

[0082] Specifically, the track filter circuit can be used to filter the sampled track signal, and the local filter circuit can be used to filter the sampled local signal to remove noise signals and ensure the stability of voltage signal transmission.

[0083] In some optional embodiments, the phase-sensitive orbit receiver provided by the present application further includes:

[0084] Track input lightning protection circuit (not shown in the figure), used to protect the track from input lightning and surge;

[0085] The input end of the track input lightning protection circuit is connected to the track voltage output circuit, and the output end thereof is connected to the input end of the track signal sampling circuit 1 .

[0086] Specifically, the rail input lightning protection circuit in the present application adopts a high-power bidirectional transient lightning arrester to achieve protection against input lightning and surges.

[0087] In some optional embodiments, the phase-sensitive orbit receiver provided by the present application further includes:

[0088] A power supply circuit 8, used for providing electric energy to the processing circuit 3;

[0089] The power supply circuit 8 is connected to the processing circuit 3 .

[0090] Specifically, the power supply circuit 8 in the present application outputs a stable 5V working power supply, which is only used for the single-chip microcomputer and its peripheral auxiliary circuits.

[0091] In some optional embodiments, the phase-sensitive orbit receiver provided by the present application further includes:

[0092] An anti-reverse connection circuit (not shown in the figure), used to disconnect the power circuit 8 when the power supply is reversely connected;

[0093] The input end of the anti-reverse connection circuit is connected to the output end of the power supply circuit 8 , and the output end thereof is connected to the input end of the processing circuit 3 .

[0094] In the present application, a reverse polarity protection circuit is connected to the positive end of the power supply, and the reverse polarity protection circuit adopts a unidirectional conducting diode; the unidirectional conducting diode is used to disconnect the working power supply circuit when the working power supply is reversely connected, thereby realizing the reverse polarity protection of the power supply.

[0095] In some optional embodiments, the display circuit 5 includes:

[0096] Digital display for showing rail voltage amplitude and phase angle.

[0097] The staff can observe the measured value, effective value and phase angle of the track receiving end relay voltage at any time through the digital display, which is convenient for the staff to supervise the working condition of the track circuit and improve work efficiency.

[0098] In some optional embodiments, the processing circuit 3 adopts a single chip microcomputer.

[0099] The single chip microcomputer adopts DSP chip.

[0100] The phase-sensitive track receiver provided in this application adopts a DSP chip, and utilizes the signal sampling, analysis and processing functions of the DSP chip to realize the calculation and processing of the track signal, local signal and phase of the phase-sensitive track circuit, thereby enhancing the signal processing capability and anti-interference capability of the receiver.

[0101] It is understandable that the alarm circuit 7 in the present application can be provided on the alarm box using an alarm indicator light or an alarm light. For example, a green light, a red light and a yellow light are used, and the green light indicates that the track is in an idle state. The red light indicates that the track is in an occupied state. The yellow light indicates that the monitored track voltage and phase angle value are not within the set range or the single-chip microcomputer fails, that is, an abnormality occurs, and the yellow light is on to warn.

[0102] In summary, the phase-sensitive track receiver provided by the utility model is suitable for the receiving end of a 25Hz phase-sensitive track circuit, and is used to detect the occupied and idle states of the track circuit. The phase-sensitive track receiver is mainly composed of a power supply circuit, a track signal sampling circuit, a local signal sampling circuit, a processing circuit, a drive output circuit, and a display circuit. The track receiver uses a DSP chip to analyze and process the track signal, local signal, and phase calculation of the phase-sensitive track circuit to improve the data processing capability and anti-interference capability of the phase-sensitive track receiver; the phase-sensitive track receiver has the functions of an existing receiver, and has added a self-detection function for receiver faults, a track voltage, a phase angle, and an output voltage display function; the electromagnetic compatibility and anti-interference design are optimized to improve the overall reliability of the track circuit.

[0103] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A phase-sensitive orbit receiver, characterized in that: include: Track signal sampling circuit, local signal sampling circuit, processing circuit, drive output circuit and display circuit; The output end of the track signal sampling circuit and the output end of the local signal sampling circuit are respectively connected to the input end of the processing circuit, and the output end of the processing circuit is respectively connected to the input end of the display circuit and the drive output circuit; The track signal sampling circuit is used to collect the track pulse signal and the track analog voltage signal obtained by the track signal conversion; The local signal sampling circuit is used to collect the local pulse signal obtained according to the local signal conversion; The processing circuit is used to calculate the track voltage amplitude according to the track simulation voltage signal, and calculate the phase angle according to the track pulse signal and the local pulse signal, and generate a logic signal according to the track voltage amplitude and the phase angle; the phase angle is the phase difference between the track signal and the local signal; The drive output circuit is used to output a drive signal according to the logic signal; the drive signal is used to drive a relay connected to the phase-sensitive track receiver; The display circuit is used for displaying the rail voltage amplitude and the phase angle.

2. The phase-sensitive orbit receiver according to claim 1, characterized in that: Also includes: an output detection circuit, configured to generate an alarm signal when the processing circuit generates a logic signal but the drive output circuit does not receive the logic signal, and feed the alarm signal back to the drive output circuit; One end of the output detection circuit is connected to the driving output circuit, and the other end of the output detection circuit is connected to the processing circuit.

3. The phase-sensitive orbit receiver according to claim 2, characterized in that: Also includes: An alarm circuit, used for giving an alarm according to an alarm signal; The alarm circuit is connected to the drive output circuit.

4. The phase-sensitive orbit receiver according to claim 1, characterized in that: Also includes: Track input isolation circuit, used for electromagnetically isolating the received track signal; A local input isolation circuit is used to perform electromagnetic isolation on the received local signal; The output end of the track input isolation circuit is connected to the input end of the track signal sampling circuit, and the output end of the local input isolation circuit is connected to the input end of the local signal sampling circuit.

5. The phase-sensitive orbit receiver according to claim 1, characterized in that: Also includes: Track filter circuit, used for filtering track signals; A local filtering circuit, used for filtering local signals; The input end of the track filter circuit is connected to the output end of the track signal sampling circuit, and the output end thereof is connected to the processing circuit; The input end of the local filtering circuit is connected to the output end of the local signal sampling circuit, and the output end thereof is connected to the processing circuit.

6. The phase-sensitive orbit receiver according to claim 1, characterized in that: Also includes: Track input lightning protection circuit, used to protect the track from input lightning and surge; The input end of the track input lightning protection circuit is connected to the track voltage output circuit, and the output end thereof is connected to the input end of the track signal sampling circuit.

7. The phase-sensitive orbit receiver according to claim 1, characterized in that: Also includes: a power supply circuit, used for providing electrical energy to the processing circuit; The power supply circuit is connected to the processing circuit.

8. The phase-sensitive orbit receiver according to claim 7, characterized in that: Also includes: Anti-reverse connection circuit, used to disconnect the power circuit when the power is reversely connected; The input end of the anti-reverse connection circuit is connected to the output end of the power supply circuit, and the output end of the anti-reverse connection circuit is connected to the input end of the processing circuit.

9. The phase-sensitive orbit receiver according to claim 1, characterized in that: The display circuit comprises: Digital display for showing rail voltage amplitude and phase angle.

10. The phase-sensitive orbit receiver according to any one of claims 1 to 9, characterized in that: The processing circuit adopts a single chip microcomputer; The single chip microcomputer adopts DSP chip.

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