25Hz phase-sensitive track circuit protection monitor

Abstract

The invention discloses a 25Hz phase-sensitive track circuit protection monitor, relates to the field of track circuit detection, and solves the technical problem that different track circuit systems are inconvenient to maintain in the prior art. The device comprises a rail voltage selection unit circuit which is used for selecting an adjusting voltage threshold value and a releasing voltage threshold value which are matched with the current rail input according to the current rail input; the track input processing circuit is used for carrying out shaping processing on an input electric signal input by a track to obtain track voltage; and the logical operation unit circuit is used for judging the magnitude relationship between the track voltage and an adjusting voltage threshold value, and when the track voltage is greater than the adjusting voltage threshold value, the local voltage of a track electronic receiver or a binary two-position relay is accessed. According to the invention, perfect voltage and fault alarm display is realized, and the reliability that the track relay can fall down when the shunt residual voltage is relatively high is improved.

Description

Technical Field

[0001] This invention relates to the field of track circuit detection, and more specifically, to a 25Hz phase-sensitive track circuit protection monitor. Background Technology

[0002] Poor track circuit shunt operation (commonly known as "not being able to shut down") has been a long-standing and difficult problem plaguing the entire railway electrical system for many years. Dust pollution, rail rust, and other factors cause track relays to fail to deactivate when a train occupies a section of the track circuit, posing a significant threat to train safety.

[0003] Currently, the entire railway system employs both management and technical methods to address faulty track circuit shunting. Management measures include manual rust removal, track compaction, and warning signs. Technical solutions include high-voltage asymmetrical pulse track circuits and axle counting. However, these solutions present several problems: High-voltage asymmetrical pulse track circuits require significant modifications to indoor and outdoor equipment, resulting in a large workload; this track system is an obsolete and will not be widely adopted, making future maintenance equipment sourcing difficult; and the use of different track circuit systems within a single station complicates maintenance. Axle counting is also highly susceptible to external interference, is costly, and cannot be widely implemented. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a 25Hz phase-sensitive track circuit protection monitor to address the shortcomings of the existing technology and solve the technical problem of inconvenience in maintaining different track circuit systems.

[0005] The present invention discloses a 25Hz phase-sensitive track circuit protection monitor, which includes a track voltage selection unit circuit for selecting an adjustment voltage threshold and a release voltage threshold that match the current track input.

[0006] The track input processing circuit is used to shape the input electrical signal of the track input to obtain the track voltage;

[0007] The logic operation unit circuit is used to determine the relationship between the track voltage and the adjustment voltage threshold. When the track voltage is greater than the adjustment voltage threshold, the local voltage of the track electronic receiver or the binary two-position relay is connected. When the track voltage is less than the release voltage threshold, the local voltage of the track electronic receiver or the binary two-position relay is disconnected. If the track voltage is between the adjustment voltage threshold and the release voltage threshold, a shunt malfunction alarm is executed.

[0008] As a further improvement, the logic operation unit circuit includes a processor; the fortieth pin of the processor is connected to the power supply of the power supply circuit through the thirty-first resistor, and the fortieth pin of the processor is also connected to the first voltage selection terminal of the rail voltage selection unit circuit.

[0009] The processor's 41st pin is connected to the power supply of the power supply circuit through the 32nd resistor, and the processor's 41st pin is also connected to the third voltage selection terminal of the rail voltage selection unit circuit.

[0010] The processor's 42nd pin is connected to the power supply of the power supply circuit through the 33rd resistor, and the processor's 42nd pin is also connected to the second voltage selection terminal of the rail voltage selection unit circuit.

[0011] The processor's 43rd pin is connected to the power supply of the power supply circuit through the 34th resistor, and the processor's 43rd pin is also connected to the fourth voltage selection terminal of the rail voltage selection unit circuit.

[0012] Furthermore, the rail pressure selection unit circuit includes a connection board for the first intermediate relay;

[0013] The forty-second terminal of the connecting plate is the default selection terminal;

[0014] The sixty-third terminal of the connecting plate serves as the first voltage selection terminal;

[0015] The sixty-first terminal of the connecting plate serves as the second voltage selection terminal;

[0016] The sixty-second terminal of the connecting plate serves as the third voltage selection terminal;

[0017] The 83rd terminal of the connecting plate serves as the fourth voltage selection terminal;

[0018] When the 42nd and 63rd terminals of the connecting plate are sealed together, the release voltage threshold is a preset first release voltage value, and the adjustment voltage threshold is a preset first adjustment voltage value.

[0019] When the forty-second and sixty-first terminals of the connecting plate are sealed together, the release voltage threshold is a preset second release voltage value, and the adjustment voltage threshold is a preset second adjustment voltage value.

[0020] When the 42nd and 62nd terminals of the connecting plate are sealed together, the release voltage threshold is a preset third release voltage value, and the adjustment voltage threshold is a preset third adjustment voltage value.

[0021] When the forty-second and eighty-third terminals of the connecting plate are sealed together, the release voltage threshold is a preset fourth release voltage value, and the adjustment voltage threshold is a preset fourth adjustment voltage value.

[0022] When the forty-two terminals of the connecting plate are not sealed, the release voltage threshold is a preset fifth release voltage value, and the adjustment voltage threshold is a preset fifth adjustment voltage value.

[0023] Furthermore, the processor is connected to a first intermediate relay via a dynamic drive circuit. The first intermediate relay is connected to a track electronic receiver or a binary two-position relay, and the first intermediate relay is equipped with a signal feedback circuit, which is connected to the processor.

[0024] Furthermore, the dynamic driving circuit includes a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a twenty-third capacitor, a first diode, a second diode, an eleventh transistor, a twelfth transistor, a thirteenth transistor, a twenty-first resistor, a twenty-second resistor, a twenty-fourth resistor, a twenty-fifth resistor, and a sixth optocoupler.

[0025] The coil of the first intermediate relay is connected in parallel with the twenty-third capacitor. The twenty-third capacitor is connected in parallel with the twenty-second capacitor. One end of the twenty-second capacitor is connected to the anode of the third diode. The cathode of the third diode is connected to the anode of the second diode. The cathode of the third diode is connected to the twenty-first capacitor. The twenty-first capacitor and the twentieth capacitor are connected in series. One end of the twentieth capacitor is connected to the emitter of the twelfth transistor and the collector of the thirteenth transistor, respectively. The collector of the twelfth transistor is connected to a 24V power supply through a twenty-fifth resistor. The base of the twelfth transistor is connected to a 24V power supply through a twenty-fourth resistor. The base of the thirteenth transistor is connected to the base of the twelfth transistor. The base of the thirteenth transistor is connected to the collector of the eleventh transistor. The base of the eleventh transistor is connected to the fourth pin of the sixth optocoupler through a twenty-third resistor. The fourth pin of the sixth optocoupler is connected to a 24V power supply through a twenty-second resistor. The first pin of the sixth optocoupler is connected to the power supply through a twenty-first resistor. The second pin of the sixth optocoupler is connected to the thirty-eighth pin of the processor.

[0026] The other end of the 22nd capacitor, the cathode of the 2nd diode, the emitter of the 13th transistor, the emitter of the 11th transistor, and the third pin of the 6th optocoupler are all grounded.

[0027] Furthermore, the signal feedback circuit includes a dynamic readback circuit, which includes a 26th resistor and a 44th resistor. The power supply of the power supply circuit is connected to the second normally open contact of the first intermediate relay. The second normally open contact of the first intermediate relay is grounded through the 44th resistor. The normally open contact of the first intermediate relay is connected to the second pin of the processor through the 26th resistor.

[0028] Furthermore, the signal feedback circuit also includes a dynamic readback alarm circuit, which includes an adjustment indicator light, an occupancy indicator light, an alarm indicator light, and a drive indicator light. The 23rd pin of the processor is connected to the power supply through the alarm indicator light, the 24th pin of the processor is connected to the power supply through the adjustment indicator light, the 26th pin of the processor is connected to the power supply through the adjustment indicator light, and one end of the coil of the first intermediate relay is connected to the drive indicator light.

[0029] Furthermore, the track input processing circuit includes three sockets, a thermistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first diode, a first sliding rheostat, a first transformer, and a common-mode inductor.

[0030] The 21st terminal of the connecting plate is connected to the first interface of the three-socket, the 11th terminal of the connecting plate is connected to the third interface of the three-socket, the second interface of the three-socket is connected to the lightning protection ground, the first interface of the three-socket is connected to one end of the thermistor, the third interface of the three-socket is connected to the other end of the thermistor, one end of the thermistor is connected to the third terminal of the first transformer, the other end of the thermistor is connected to the first terminal of the first transformer through the 11th resistor, the second terminal of the first transformer is connected to the first terminal of the common-mode inductor, the fourth terminal of the first transformer is connected to the second terminal of the common-mode inductor, the third terminal of the common-mode inductor is connected to one end of the 12th resistor, the fourth terminal of the common-mode inductor is connected to the other end of the 12th resistor, the 12th resistor is connected in parallel with the first sliding rheostat, one end of the sliding rheostat is connected to the 13th resistor, the other end of the sliding rheostat is grounded, the 13th resistor is connected to the cathode of the first diode, the anode of the first diode is grounded, and the cathode of the first diode is connected to the fourth pin of the processor.

[0031] Furthermore, the alarm control circuit includes an AC / DC switching circuit, which includes a second intermediate relay, an eleventh diode, a fourth transistor, a forty-first resistor, and a forty-second resistor. The power supply is connected to the collector of the fourth transistor through the coil of the second intermediate relay. The collector of the fourth transistor is connected to the anode of the eleventh diode, and the cathode of the eleventh diode is connected to the power supply. The base of the fourth transistor is connected to the first pin of the processor through the forty-first resistor, and the base of the fourth transistor is grounded through the forty-second resistor. The emitter of the fourth transistor is also grounded.

[0032] Furthermore, the alarm control circuit also includes an alarm readback circuit, which includes a 27th resistor and a 43rd resistor. The power supply is connected to the normally open contact of the second intermediate relay, which is grounded through the 43rd resistor. The normally open contact of the second intermediate relay is connected to the 39th pin of the processor through the 27th resistor.

[0033] Beneficial effects

[0034] The advantages of this invention are:

[0035] This invention includes a rail voltage selection unit circuit, a rail input processing circuit, and a logic operation unit circuit. The rail voltage selection unit circuit selects an adjustment voltage threshold and a release voltage threshold that match the current rail input. The rail input processing circuit obtains the processed rail voltage. Based on the logic operation unit circuit and the rail voltage, the system controls whether to connect the local voltage of the rail electronic receiver or the binary two-position relay, or to execute a shunt fault alarm. This achieves comprehensive voltage and fault alarm display and improves the reliability of the rail relay when the shunt residual voltage is high. Attached Figure Description

[0036] Figure 1 This is a diagram showing the on-site layout of the monitor of the present invention;

[0037] Figure 2 This is a functional schematic diagram of the monitor of the present invention;

[0038] Figure 3 This is a schematic diagram of the circuit connections of the monitor of the present invention;

[0039] Figure 4 This is a schematic diagram of the logic operation unit circuit of the present invention;

[0040] Figure 5 This is a schematic diagram of the rail voltage selection unit circuit of the present invention;

[0041] Figure 6 This is a schematic diagram of the dynamic driving circuit of the present invention;

[0042] Figure 7 This is a schematic diagram of the dynamic readback alarm circuit of the present invention;

[0043] Figure 8 This is a schematic diagram of the track input processing circuit of the present invention;

[0044] Figure 9 This is a schematic diagram of the alarm control circuit of the present invention;

[0045] Figure 10 This is a schematic diagram of the alarm readback circuit of the present invention;

[0046] Figure 11 This is a schematic diagram of the digital tube display circuit of the present invention;

[0047] Figure 12 This is a schematic diagram of the dynamic readback alarm display circuit of the present invention;

[0048] Figure 13 This is a schematic diagram of the working status indication circuit of the present invention;

[0049] Figure 14 This is a schematic diagram of the power supply circuit of the present invention;

[0050] Figure 15 This is a schematic diagram of the internal circuit connection of the monitor of the present invention.

[0051] Wherein: KZJ - First intermediate relay, C20 - Twentieth capacitor, C21 - Twenty-first capacitor, C22 - Twenty-second capacitor, C23 - Twenty-third capacitor, D1 - First diode, D2 - Second diode, D11 - Eleventh transistor, D12 - Twelfth transistor, D13 - Thirteenth transistor, R21 - Twenty-first resistor, R22 - Twenty-second resistor, R24 - Twenty-fourth resistor, R25 - Twenty-fifth resistor, IC6 - Sixth optocoupler, SETD0 - Default indicator light, SETD1 - First indicator light, SETD2 - Second indicator light, SETD3 - Third indicator light, SE TD4 - Fourth indicator light, U5 - Processor, FDG - Three-socket, YM - Thermistor, R11 - Eleventh resistor, R12 - Twelfth resistor, R13 - Thirteenth resistor, D1 - First diode, DWQ1 - First sliding rheostat, CGQ - First transformer, FL2D - Common mode inductor, R26 - Twenty-sixth resistor, R44 - Forty-fourth resistor, BJJ - Second intermediate relay, D12 - Eleventh diode, G4 - Fourth transistor, R41 - Forty-first resistor, R42 - Forty-second resistor, R27 - Twenty-seventh resistor, R43 - Forty-third resistor, GDJ - Binary two-position relay. Detailed Implementation

[0052] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0053] See Figures 1-15 The present invention provides a 25Hz phase-sensitive track circuit protection monitor, such as... Figure 1 As shown, it includes a rail voltage selection unit circuit for selecting an adjustment voltage threshold and a release voltage threshold that match the current rail input.

[0054] The track input processing circuit is used to shape the input electrical signal of the track input to obtain the track voltage.

[0055] The logic operation unit circuit is used to determine the relationship between the track voltage and the adjustment voltage threshold. When the track voltage is greater than the adjustment voltage threshold, the local voltage of the track electronic receiver or the binary two-position relay GDJ is connected. When the track voltage is less than the release voltage threshold, the local voltage of the track electronic receiver or the binary two-position relay GDJ is disconnected. If the track voltage is between the adjustment voltage threshold and the release voltage threshold, a shunt fault alarm is executed, realizing a complete voltage and fault alarm display and improving the reliability of the track relay when the shunt residual voltage is high.

[0056] By monitoring the track voltage (frequency 25Hz), when the track voltage is greater than the preset adjustment voltage, the local voltage of the track electronic receiver or the binary 2-position relay GDJ is activated; when the track voltage is less than the preset release voltage value, the local voltage of the track electronic receiver or the binary 2-position relay GDJ is deactivated. Specifically: when the track voltage is greater than the preset adjustment voltage, the contact of the first intermediate relay KZJ drops, activating the local voltage of the track electronic receiver or the binary 2-position relay GDJ; when the track voltage is less than the preset release voltage value, the contact of the first intermediate relay KZJ picks up, deactivating the local voltage of the track electronic receiver or the binary 2-position relay GDJ.

[0057] For example: After acquiring the track voltage, the release voltage threshold is 10V, and the adjustment voltage threshold is 16V. When the track voltage is less than 10V, the contacts of the first intermediate relay KZJ are activated. The local voltage of the track electronic receiver or the binary two-position relay GDJ is disconnected through the contacts of the first intermediate relay KZJ. When the track voltage is greater than 16V, the contacts of the first intermediate relay KZJ are deactivated, and the local voltage of the track electronic receiver or the binary two-position relay GDJ is reconnected through the contacts of the first intermediate relay KZJ.

[0058] like Figure 4 As shown, the logic operation unit circuit includes a processor U5. The 40th pin of the processor U5 is connected to the power supply of the power supply circuit through the 31st resistor R31. The 40th pin of the processor U5 is also connected to the first voltage selection terminal of the rail voltage selection unit circuit.

[0059] The 41st pin of processor U5 is connected to the power supply of the power supply circuit through the 33rd resistor R33. The 41st pin of processor U5 is also connected to the third voltage selection terminal of the rail voltage selection unit circuit.

[0060] The 42nd pin of processor U5 is connected to the power supply of the power supply circuit through the 32nd resistor R32. The 42nd pin of processor U5 is also connected to the second voltage selection terminal of the rail voltage selection unit circuit.

[0061] The 43rd pin of processor U5 is connected to the power supply of the power supply circuit through the 34th resistor R34. The 43rd pin of processor U5 is also connected to the fourth voltage selection terminal of the rail voltage selection unit circuit.

[0062] like Figure 5 As shown, the rail voltage selection unit circuit includes a connection board U1 for the first intermediate relay KZJ. Terminal 42 of connection board U1 serves as the default selection terminal. Terminal 63 of connection board U1 serves as the first voltage selection terminal. Terminal 61 of connection board U1 serves as the second voltage selection terminal. Terminal 62 of connection board U1 serves as the third voltage selection terminal. Terminal 83 of connection board U1 serves as the fourth voltage selection terminal.

[0063] When terminals 42 and 63 of the connecting board U1 are connected, the first release voltage is 14V and the first adjustment voltage is 19V.

[0064] When terminals 42 and 61 of the connecting board U1 are sealed together, the second release voltage is 15V and the second adjustment voltage is 20V.

[0065] When the 42nd and 62nd terminals of the connecting board U1 are sealed together, the third release voltage is 17V and the third adjustment voltage is 22V.

[0066] When terminals 42 and 83 of the connecting board U1 are sealed together, the fourth release voltage is 22V and the fourth adjustment voltage is 26V.

[0067] When the forty-two terminals of the connecting board U1 are not sealed, the fifth release voltage is 13V and the fifth adjustment voltage is 18V.

[0068] Terminal 42 of connector U1 is grounded, terminal 82 of connector U1 is grounded, terminal 72 of connector U1 is connected to a 24V power supply, terminal 52 of connector U1 is connected to the first input terminal of the AC-DC switching circuit, terminal 51 of connector U1 is connected to the second input terminal of the AC-DC switching circuit, terminal 53 of connector U1 is connected to the third input terminal of the AC-DC switching circuit, terminal 43 of connector U1 is connected to the lightning protection grounding terminal, and terminal 33 of connector U1 is connected to pin 44 of processor U5 and connected to the power supply through the second resistor R2.

[0069] The processor U5 is connected to the first intermediate relay KZJ via a dynamic drive circuit. The first intermediate relay KZJ is connected to the track electronic receiver or the binary two-position relay GDJ. The first intermediate relay KZJ is equipped with a signal feedback circuit, which is connected to the processor U5.

[0070] like Figure 6 As shown, the dynamic driving circuit includes the twentieth capacitor C20, the twenty-first capacitor C21, the twenty-second capacitor C22, the twenty-third capacitor C23, the first diode D1, the second diode D2, the eleventh transistor D11, the twelfth transistor D12, the thirteenth transistor D13, the twenty-first resistor R21, the twenty-second resistor R22, the twenty-fourth resistor R24, the twenty-fifth resistor R25, and the sixth optocoupler IC6;

[0071] The coil of the first intermediate relay KZJ is connected in parallel with the twenty-third capacitor C23. The twenty-third capacitor C23 is connected in parallel with the twenty-second capacitor C22. One end of the twenty-second capacitor C22 is connected to the anode of the third diode D3. The cathode of the third diode D3 is connected to the anode of the second diode D2. The cathode of the third diode D3 is connected to the twenty-first capacitor C21. The twenty-first capacitor C21 and the twentieth capacitor C20 are connected in series. One end of the twentieth capacitor C20 is connected to the emitter of the twelfth transistor G12 and the collector of the thirteenth transistor G13. The collector of the twelfth transistor G12 is connected to the 24V power supply through the twenty-fifth resistor. The base of transistor G12 is connected to the 24V power supply through resistor R24 ​​(24th resistor). The base of transistor G13 (13th resistor) is connected to the base of transistor G12 (12th resistor). The base of transistor G13 (13th resistor) is connected to the collector of transistor G11 (11th resistor). The base of transistor G11 (11th resistor) is connected to the fourth pin of optocoupler IC6 (6th optocoupler IC6) through resistor R23 (23rd resistor). The fourth pin of optocoupler IC6 (6th optocoupler IC6) is connected to the 24V power supply through resistor R22 (22nd resistor). The first pin of optocoupler IC6 (6th optocoupler IC6) is connected to the power supply through resistor R21 (21st resistor). The second pin of optocoupler IC6 (6th optocoupler IC6) is connected to the thirty-eighth pin of processor U5.

[0072] The other end of the twenty-second capacitor C22, the cathode of the second diode D2, the emitter of the thirteenth transistor G13, the emitter of the eleventh transistor G11, and the third pin of the sixth optocoupler IC6 are all grounded. The coil of the first intermediate relay KZJ is controlled by a dynamic drive circuit. The control port of the first intermediate relay KZJ operates in PWM mode. The required drive voltage for KZJ is adjusted by the pulse frequency. (The first intermediate relay KZJ is a 12V relay.)

[0073] like Figure 7As shown, the signal feedback circuit includes a dynamic readback circuit, which comprises a 26th resistor R26 and a 44th resistor R44. The power supply of the power supply circuit is connected to the second normally open contact of the first intermediate relay KZJ. The second normally open contact of the first intermediate relay KZJ is grounded through the 44th resistor R44. The normally open contact of the first intermediate relay KZJ is connected to the second pin of the processor U5 through the 26th resistor R26. The dynamic readback circuit is used to read the falling state of the contact of the first intermediate relay KZJ and transmit the state information to the processor U5.

[0074] like Figure 12 As shown, the signal feedback circuit also includes a dynamic readback alarm circuit. The dynamic readback alarm circuit includes an adjustment indicator TZD, an occupancy indicator ZYD, an alarm indicator BJD, and a drive indicator DRD. The 23rd pin of the processor U5 is connected to the power supply through the alarm indicator BJD, the 24th pin of the processor U5 is connected to the power supply through the adjustment indicator TZD, the 26th pin of the processor U5 is connected to the power supply through the adjustment indicator ZYD, and one end of the coil of the first intermediate relay KZJ is connected to the drive indicator DRD.

[0075] When the rail voltage is greater than the adjustment voltage threshold, the 24th pin of the processor U5 outputs a low level, and the adjustment indicator TZD displays green.

[0076] When the second pin of processor U5 detects a high level and the rail voltage is less than the adjustment voltage threshold, the twenty-sixth pin of processor U5 outputs a low level, and the occupancy indicator ZYD displays red.

[0077] When the first intermediate relay KZJ is energized and the second pin of the processor U5 detects a low level, the twenty-third pin of the processor U5 outputs a low level, and the alarm indicator BJD displays red.

[0078] When the track voltage is less than the adjustment voltage threshold and the second pin of the processor U5 detects a high level, the twenty-third pin of the processor U5 outputs a low level, and the alarm indicator BJD displays red.

[0079] When the track voltage is greater than the adjustment voltage threshold and the second pin of the processor U5 detects a low level, the twenty-third pin of the processor U5 outputs a low level, and the alarm indicator BJD displays red.

[0080] like Figure 8 As shown, the track input processing circuit includes a three-socket FDG, a thermistor YM, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a first diode D1, a first sliding rheostat DWQ1, a first transformer CGQ, and a common-mode inductor FL2D.

[0081] The 21st terminal of the connecting board U1 is connected to the first interface of the three-socket FDG. The 11th terminal of the connecting board U1 is connected to the third interface of the three-socket FDG. The second interface of the three-socket FDG is connected to the lightning protection ground. The first interface of the three-socket FDG is connected to one end of the thermistor YM. The third interface of the three-socket FDG is connected to the other end of the thermistor YM. One end of the thermistor YM is connected to the third terminal of the first transformer CGQ. The other end of the thermistor YM is connected to the first terminal of the first transformer CGQ through the 11th resistor R11. The second terminal of the first transformer CGQ is connected to the first terminal of the common-mode inductor FL2D. The fourth terminal of the first transformer CGQ is connected to the second terminal of the common-mode inductor FL2D. The third terminal of the common-mode inductor FL2D is connected to one end of the twelfth resistor R12. The fourth terminal of the common-mode inductor FL2D is connected to the other end of the twelfth resistor R12. The twelfth resistor R12 is connected in parallel with the first sliding rheostat DWQ1. One end of the sliding rheostat DWQ1 is connected to the thirteenth resistor R13. The other end of the sliding rheostat DWQ1 is grounded. The thirteenth resistor R13 is connected to the cathode of the first diode D1. The anode of the first diode D1 is grounded. The cathode of the first diode D1 is connected to the fourth pin of the processor U5.

[0082] In the rail voltage input processing circuit, the eleventh resistor R11 is selected to ensure that the current through the voltage sensor does not exceed 10mA. The accuracy is adjusted using the first adjusting rheostat DWQ1 (the twelfth resistor R12 is not soldered). The voltage sampling range is adjusted from 0V to 35V. The reference voltage is +2.5V.

[0083] The alarm control circuit includes an AC / DC switching circuit and an alarm readback circuit. For example... Figure 9 As shown, the AC / DC switching circuit includes a second intermediate relay BJJ, an eleventh diode D12, a fourth transistor G4, a forty-first resistor R41, and a forty-second resistor R42. The power supply is connected to the collector of the fourth transistor G4 through the coil of the second intermediate relay BJJ. The collector of the fourth transistor G4 is connected to the anode of the eleventh diode D11. The cathode of the eleventh diode D11 is connected to the power supply. The base of the fourth transistor G4 is connected to the first pin of the processor U5 through the forty-first resistor. The base of the fourth transistor G4 is grounded through the forty-second resistor R42. The emitter of the fourth transistor G4 is grounded.

[0084] like Figure 10 As shown, the alarm readback circuit includes a 27th resistor R27 and a 43rd resistor R43. The power supply is connected to the normally open contact of the second intermediate relay BJJ. The normally open contact of the second intermediate relay BJJ is grounded through the 43rd resistor R43. The normally open contact of the second intermediate relay BJJ is connected to the 39th pin of the processor U5 through the 27th resistor R27.

[0085] like Figure 13 As shown, the operating status display circuit includes a first indicator light SETD1, a second indicator light SETD2, a third indicator light SETD3, a fourth indicator light SETD4, and a default indicator light SETD0. The operating status display circuit provides the specific values ​​for the release voltage threshold and the adjustment voltage threshold.

[0086] The anode of the first indicator light SETD1 is connected to the power supply, and the cathode of the first indicator light SETD1 is connected to pin 17 of the processor U5. When terminals 42 and 63 of the connector board U1 are connected, the first indicator light SETD1 displays green.

[0087] The anode of the second indicator light SETD2 is connected to the power supply, and the cathode of the second indicator light SETD2 is connected to the thirty-fourth pin of the processor U5. When the forty-second and sixty-first terminals of the connector board U1 are connected, the second indicator light SETD2 displays green.

[0088] The anode of the third indicator light SETD3 is connected to the power supply, and the cathode of the third indicator light SETD3 is connected to pin 33 of the processor U5. When terminals 42 and 62 of the connector board U1 are connected, the third indicator light SETD3 displays green.

[0089] The anode of the fourth indicator light SETD4 is connected to the power supply, and the cathode of the fourth indicator light SETD4 is connected to pin 32 of the processor U5. When terminals 42 and 83 of the connector board U1 are connected, the fourth indicator light SETD4 displays green.

[0090] The anode of the default indicator light SETD0 is connected to the power supply, and the cathode of the default indicator light SETD0 is connected to pin 17 of processor U5. When the 42 terminals of the connector board U1 are not sealed, the default indicator light displays green.

[0091] like Figure 11As shown, the digital tube circuit includes a digital tube display module (SMG); the first pin of the SMG is connected to the thirty-first pin of the processor U5; the second pin of the SMG is connected to the thirty-second pin of the processor U5; the third pin of the SMG is connected to the thirty-third pin of the processor U5; the fourth pin of the SMG is connected to the thirty-fourth pin of the processor U5; the fifth pin of the SMG is connected to the thirty-fifth pin of the processor U5; the seventh pin of the SMG is connected to the thirty-seventh pin of the processor U5; the eighth pin of the SMG is connected to the twenty-ninth pin of the processor U5; the ninth pin of the SMG is connected to the twenty-eighth pin of the processor U5; the tenth pin of the SMG is connected to the thirty-sixth pin of the processor U5; the eleventh pin of the SMG is connected to the thirtieth pin of the processor U5; and the twelfth pin of the SMG is connected to the twenty-seventh pin of the processor U5. The track voltage value is displayed via a digital tube display module (SMG). When the track voltage value is less than 2.5V, it displays "0.00V", and when the track voltage value is greater than 30V, it displays "H30".

[0092] The power supply circuit in this invention is existing technology, and this invention does not improve upon it.

[0093] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A 25Hz phase-sensitive track circuit protection monitor, characterized in that, It includes a rail voltage selection unit circuit, which selects a matching adjustment voltage threshold and a release voltage threshold based on the current rail input; The track input processing circuit is used to shape the input electrical signal of the track input to obtain the track voltage; The logic operation unit circuit is used to determine the relationship between the track voltage and the adjustment voltage threshold. When the track voltage is greater than the adjustment voltage threshold, the local voltage of the track electronic receiver or binary two-position relay (GDJ) is connected. When the track voltage is less than the release voltage threshold, the local voltage of the track electronic receiver or binary two-position relay (GDJ) is disconnected. If the track voltage is between the adjustment voltage threshold and the release voltage threshold, a shunt malfunction alarm is executed.

2. The 25Hz phase-sensitive track circuit protection monitor according to claim 1, characterized in that, The logic operation unit circuit includes a processor (U5); the fortieth pin of the processor (U5) is connected to the power supply of the power supply circuit through the thirty-first resistor (R31), and the fortieth pin of the processor (U5) is also connected to the first voltage selection terminal of the rail voltage selection unit circuit; The 41st pin of the processor (U5) is connected to the power supply of the power supply circuit through the 33rd resistor (R33), and the 41st pin of the processor (U5) is also connected to the third voltage selection terminal of the rail voltage selection unit circuit. The 42nd pin of the processor (U5) is connected to the power supply of the power supply circuit through the 32nd resistor (R32), and the 42nd pin of the processor (U5) is also connected to the second voltage selection terminal of the rail voltage selection unit circuit. The 43rd pin of the processor (U5) is connected to the power supply of the power supply circuit through the 34th resistor (R34), and the 43rd pin of the processor (U5) is also connected to the fourth voltage selection terminal of the rail voltage selection unit circuit.

3. A 25Hz phase-sensitive track circuit protection monitor according to claim 2, characterized in that, The rail pressure selection unit circuit includes a connection board (U1) for the first intermediate relay (KZJ); The forty-second terminal of the connecting plate (U1) is the default selection terminal; The sixty-third terminal of the connecting plate (U1) serves as the first voltage selection terminal; The sixty-first terminal of the connecting plate (U1) serves as the second voltage selection terminal; The sixty-second terminal of the connecting plate (U1) serves as the third voltage selection terminal; The eighty-third terminal of the connecting plate (U1) serves as the fourth voltage selection terminal; When the forty-second and sixty-third terminals of the connecting plate (U1) are sealed together, the release voltage threshold is a preset first release voltage value, and the adjustment voltage threshold is a preset first adjustment voltage value. When the forty-second and sixty-first terminals of the connecting plate (U1) are sealed together, the release voltage threshold is a preset second release voltage value, and the adjustment voltage threshold is a preset second adjustment voltage value. When the forty-second and sixty-second terminals of the connecting plate (U1) are sealed together, the release voltage threshold is a preset third release voltage value, and the adjustment voltage threshold is a preset third adjustment voltage value. When the forty-second and eighty-third terminals of the connecting plate (U1) are sealed together, the release voltage threshold is a preset fourth release voltage value, and the adjustment voltage threshold is a preset fourth adjustment voltage value; When the forty-two terminals of the connecting plate (U1) are not sealed, the release voltage threshold is a preset fifth release voltage value, and the adjustment voltage threshold is a preset fifth adjustment voltage value.

4. A 25Hz phase-sensitive track circuit protection monitor according to claim 2, characterized in that, The processor (U5) is connected to a first intermediate relay (KZJ) via a dynamic drive circuit. The first intermediate relay (KZJ) is connected to a track electronic receiver or a binary two-position relay (GDJ). The first intermediate relay (KZJ) is equipped with a signal feedback circuit, which is connected to the processor (U5).

5. A 25Hz phase-sensitive track circuit protection monitor according to claim 4, characterized in that, The dynamic driving circuit includes a twentieth capacitor (C20), a twenty-first capacitor (C21), a twenty-second capacitor (C22), a twenty-third capacitor (C23), a first diode (D1), a second diode (D2), an eleventh transistor (D11), a twelfth transistor (D12), a thirteenth transistor (D13), a twenty-first resistor (R21), a twenty-second resistor (R22), a twenty-fourth resistor (R24), a twenty-fifth resistor (R25), and a sixth optocoupler (IC6); The coil of the first intermediate relay (KZJ) is connected in parallel with the twenty-third capacitor (C23). The twenty-third capacitor (C23) is connected in parallel with the twenty-second capacitor (C22). One end of the twenty-second capacitor (C22) is connected to the anode of the third diode (D3). The cathode of the third diode (D3) is connected to the anode of the second diode (D2). The cathode of the third diode (D3) is connected to the twenty-first capacitor (C21). The twenty-first capacitor (C21) is connected in series with the twentieth capacitor (C20). One end of the twentieth capacitor (C20) is connected to the emitter of the twelfth transistor (G12) and the collector of the thirteenth transistor (G13). The collector of the twelfth transistor (G12) is connected to a 24V power supply through the twenty-fifth resistor. The base of the twelfth transistor (G12) is connected to the 24V power supply through the twenty-fourth resistor (R24). The base of the thirteenth transistor (G13) is connected to the base of the twelfth transistor (G12). The base of the thirteenth transistor (G13) is connected to the collector of the eleventh transistor (G11). The base of the eleventh transistor (G11) is connected to the fourth pin of the sixth optocoupler (IC6) through the twenty-third resistor (R23). The fourth pin of the sixth optocoupler (IC6) is connected to the 24V power supply through the twenty-second resistor (R22). The first pin of the sixth optocoupler (IC6) is connected to the power supply through the twenty-first resistor (R21). The second pin of the sixth optocoupler (IC6) is connected to the thirty-eighth pin of the processor (U5). The other end of the 22nd capacitor (C22), the cathode of the 2nd diode (D2), the emitter of the 13th transistor (G13), the emitter of the 11th transistor (G11), and the third pin of the 6th optocoupler (IC6) are all grounded.

6. A 25Hz phase-sensitive track circuit protection monitor according to claim 4, characterized in that, The signal feedback circuit includes a dynamic readback circuit, which includes a 26th resistor (R26) and a 44th resistor (R44). The power supply of the power supply circuit is connected to the second normally open contact of the first intermediate relay (KZJ). The second normally open contact of the first intermediate relay (KZJ) is grounded through the 44th resistor (R44). The normally open contact of the first intermediate relay (KZJ) is connected to the second pin of the processor (U5) through the 26th resistor (R26).

7. A 25Hz phase-sensitive track circuit protection monitor according to claim 6, characterized in that, The signal feedback circuit also includes a dynamic readback alarm circuit, which includes an adjustment indicator (TZD), an occupancy indicator (ZYD), an alarm indicator (BJD), and a drive indicator (DRD). The 23rd pin of the processor (U5) is connected to the power supply through the alarm indicator (BJD), the 24th pin of the processor (U5) is connected to the power supply through the adjustment indicator (TZD), the 26th pin of the processor (U5) is connected to the power supply through the adjustment indicator (ZYD), and one end of the coil of the first intermediate relay (KZJ) is connected to the drive indicator (DRD).

8. A 25Hz phase-sensitive track circuit protection monitor according to claim 2, characterized in that, The track input processing circuit includes a three-socket (FDG), a thermistor (YM), an eleventh resistor (R11), a twelfth resistor (R12), a thirteenth resistor (R13), a first diode (D1), a first sliding rheostat (DWQ1), a first transformer (CGQ), and a common-mode inductor (FL2D). The 21st terminal of the connecting plate (U1) is connected to the first interface of the three-socket (FDG), the 11th terminal of the connecting plate (U1) is connected to the third interface of the three-socket (FDG), the second interface of the three-socket (FDG) is connected to the lightning protection ground, the first interface of the three-socket (FDG) is connected to one end of the thermistor (YM), the third interface of the three-socket (FDG) is connected to the other end of the thermistor (YM), one end of the thermistor (YM) is connected to the third terminal of the first transformer (CGQ), the other end of the thermistor (YM) is connected to the first terminal of the first transformer (CGQ) through the 11th resistor (R11), and the second terminal of the first transformer (CGQ) is connected to the first terminal of the common mode inductor (FL2D). The fourth terminal of the first transformer (CGQ) is connected to the second terminal of the common-mode inductor (FL2D). The third terminal of the common-mode inductor (FL2D) is connected to one end of the twelfth resistor (R12). The fourth terminal of the common-mode inductor (FL2D) is connected to the other end of the twelfth resistor (R12). The twelfth resistor (R12) is connected in parallel with the first sliding rheostat (DWQ1). One end of the sliding rheostat (DWQ1) is connected to the thirteenth resistor (R13). The other end of the sliding rheostat (DWQ1) is grounded. The thirteenth resistor (R13) is connected to the cathode of the first diode (D1). The anode of the first diode (D1) is grounded. The cathode of the first diode (D1) is connected to the fourth pin of the processor (U5).

9. A 25Hz phase-sensitive track circuit protection monitor according to claim 1, characterized in that, The alarm control circuit includes an AC / DC switching circuit, which includes a second intermediate relay (BJJ), an eleventh diode (D12), a fourth transistor (G4), a forty-first resistor (R41), and a forty-second resistor (R42). The power supply is connected to the collector of the fourth transistor (G4) through the coil of the second intermediate relay (BJJ). The collector of the fourth transistor (G4) is connected to the anode of the eleventh diode (D11), and the cathode of the eleventh diode (D11) is connected to the power supply. The base of the fourth transistor (G4) is connected to the first pin of the processor (U5) through the forty-first resistor. The base of the fourth transistor (G4) is grounded through the forty-second resistor (R42), and the emitter of the fourth transistor (G4) is grounded.

10. A 25Hz phase-sensitive track circuit protection monitor according to claim 9, characterized in that, The alarm control circuit also includes an alarm readback circuit, which includes a 27th resistor (R27) and a 43rd resistor (R43). The power supply is connected to the normally open contact of the second intermediate relay (BJJ). The normally open contact of the second intermediate relay (BJJ) is grounded through the 43rd resistor (R43). The normally open contact of the second intermediate relay (BJJ) is connected to the 39th pin of the processor (U5) through the 27th resistor (R27).

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