Detection and diagnosis circuit for resistance-capacitance element of slow absorption and slow discharge circuit of signal relay

Abstract

The utility model discloses a detection and diagnosis circuit for a resistance-capacitance element of a slow absorption and slow discharge circuit of a signal relay, which belongs to the technical field of safety detection and comprises a direct current transformer, a power supply module, a signal amplitude discrimination shaping module, a timing and diagnosis circuit module, a D7 and an R19, and the timing and diagnosis circuit module comprises a first diagnosis circuit module and a second diagnosis circuit module. Through the above mode, based on the voltage generated by a DC current transformer acquisition current, the signal amplitude discrimination shaping module is used to generate a square wave voltage signal, and the first diagnosis circuit module and the second diagnosis circuit module of the timing diagnosis circuit module employ an integrated digital chip circuit. And the time length of the square wave signal capable of reflecting the time length of the discharging (charging) current of the resistor-capacitor element is calculated and compared with a standard value for judgment, a diagnosis result is output, and the alarm output module gives an alarm when the diagnosis result is unqualified.

Description

Technical Field

[0001] The utility model relates to the technical field of safety detection, in particular to a detection and diagnosis circuit for resistance-capacitance elements of a slow-suction and slow-release circuit of a signal relay. Background Art

[0002] The resistance-capacitance elements of the slow-suction and slow-release circuit of the relay are important components of the railway signal control circuit, and their operation quality is directly related to railway safety.

[0003] However, at present, there is no safe and reliable detection and diagnosis equipment for the resistance-capacitance elements of the slow-suction and slow-release circuit of railway signals, and it is impossible to realize the real-time detection of the in-use resistance-capacitance elements. It depends on tooling such as a signal resistance-capacitance element test bench and a resistance-capacitance element tester for testing, and the timeliness of detection is seriously lagged, and it fails to play its due role in preventing faults from occurring.

[0004] Based on this, the utility model designs a detection and diagnosis circuit for resistance-capacitance elements of a slow-suction and slow-release circuit of a signal relay to solve the above problems. Content of the Utility Model

[0005] In view of the above-mentioned drawbacks of the prior art, the utility model provides a detection and diagnosis circuit for resistance-capacitance elements of a slow-suction and slow-release circuit of a signal relay.

[0006] To achieve the above object, the utility model is realized through the following technical solutions:

[0007] A detection and diagnosis circuit for resistance-capacitance elements of a slow-suction and slow-release circuit of a signal relay;

[0008] It includes a DC current transformer. The input ends of the DC current transformer are respectively electrically connected to the +12v and -12v power supplies. The output end of the DC current transformer is connected to a power supply module and a signal amplitude discrimination and shaping module. The output end of the DC current transformer is also electrically connected to one end of D8 and R19. The signal amplitude discrimination and shaping module is connected to a timing diagnosis circuit module. The timing diagnosis circuit module is connected to an alarm output module. R19 is in parallel with C7, and the other ends of D8 and R19 are both grounded;

[0009] The timing diagnosis circuit module includes a first diagnosis circuit module and a second diagnosis circuit module. The first diagnosis circuit module and the second diagnosis circuit module are connected. The first diagnosis circuit module and the second diagnosis circuit module are both connected to the signal amplitude discrimination and shaping module. The second diagnosis circuit module is connected to the alarm output module.

[0010] Further, the power supply module includes a voltage converter, D1, R1, D2, D3, and C1. The negative electrode of D1 is electrically connected to the input terminal of the voltage converter. The output terminal of the voltage converter is electrically connected to the positive electrode of D2. The intersection of the negative electrodes of D2 and D3 serves as the output terminal of the +5V power supply Vcc. Both the first diagnostic circuit module and the second diagnostic circuit module use the +5V power supply Vcc. Both ends of R1 are electrically connected to the positive electrodes of D2 and D3 respectively. The positive electrode of D3 is electrically connected to the positive electrode of C1. The negative electrode of C1 is electrically connected to the negative electrode of the voltage converter.

[0011] Further, the positive electrode of D1 is electrically connected to the positive electrode of the +12V power supply, and the negative electrode of the voltage converter is electrically connected to the negative electrode of the output terminal of the DC current transformer.

[0012] Further, the power supply module is an independently provided DC12V-to-DC5V circuit.

[0013] Further, the signal amplitude discrimination and shaping module includes a logic NOT gate NOT1, a logic NOT gate NOT2, and a logic NOT gate NOT3. The positive electrode of the output terminal of the DC current transformer is electrically connected to one end of the logic NOT gate NOT1. The other end of the logic NOT gate NOT1 is electrically connected to one end of the logic NOT gate NOT2. The other end of the logic NOT gate NOT2 is electrically connected to the logic NOT gate NOT3. The logic NOT gate NOT1 is connected to the second diagnostic circuit module. Both the logic NOT gate NOT2 and the logic NOT gate NOT3 are connected to the first diagnostic circuit module.

[0014] Further, the first diagnostic circuit module includes a 555 chip A, C2, R2, a circuit board test output port, R3, C3, R4, 74LS1, R5, a germanium diode GE-D1, S1, R6, S2, germanium diodes GE-D2, GE-D3, GE-D4, GE-D5, GE-D6, C4, R7, and R8. The pin 1 of the 555 chip A is grounded. The pin 2 of the 555 chip A is electrically connected to one end of C2 and the pin 6 of the 555 chip A respectively. The other end of C2 is electrically connected to the pin 1 of the 555 chip A. The pin 3 of the 555 chip A is electrically connected to the pin 1 of 74LS1. The pin 4 of the 555 chip A is electrically connected to one end of R3. The other end of R3 is grounded. The pin 4 of the 555 chip A is also electrically connected to the logic NOT gate NOT2 and the circuit board test output port respectively. The pin 5 of the 555 chip A is electrically connected to one end of C3. The other end of C3 is grounded. Both ends of R5 are electrically connected to the pins 6 and 7 of the 555 chip A respectively. Both ends of R2 are electrically connected to the pins 7 and 8 of the 555 chip A respectively. The pin 8 of the 555 chip A is also electrically connected to the +5v power supply Vcc. Both ends of R4 are electrically connected to the logic NOT gate NOT3 and the pin 2 of 74LS1 respectively. The pin 2 of 74LS1 is also electrically connected to the pin 12 of 74LS1 and one end of R7 respectively. The other end of R7 is grounded. C4 is connected in parallel with R7. The pin 3 of 74LS1 is electrically connected to the 0 terminal of the circuit board test output port. The pin 4 of 74LS1 and the 1 terminal of the circuit board test output port are electrically connected. The pin 5 of 74LS1 and the 2 terminal of the circuit board test output port are electrically connected. The pin 6 of 74LS1 is electrically connected to the pin 13 of 74LS1 and is electrically connected to the 3 terminal of the circuit board test output port. The pin 8 of 74LS1 is electrically connected to the 7 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D6 respectively. The pin 9 of 74LS1 is electrically connected to the 6 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D4 respectively. The positive electrode of the germanium diode GE-D4 is electrically connected to R6 and is electrically connected to the positive electrode of the germanium diode GE-D3. R6 is electrically connected to the +5v power supply Vcc. The pin 10 of 74LS1 is electrically connected to the 5 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D5 respectively. The positive electrode of the germanium diode GE-D5 is electrically connected to the positive electrode of the germanium diode GE-D4 and is electrically connected to the negative electrode of the germanium diode GE-D3. The positive electrodes of the germanium diodes GE-D3 and GE-D5 are both connected to the second diagnostic circuit module. The pin 11 of 74LS1 is electrically connected to the 4 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D2 respectively. The pin 13 of 74LS1 is electrically connected to the 3 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D1 respectively. The positive electrodes of the germanium diodes GE-D2 and GE-D1 are electrically connected to one end of S2 and S1 respectively. One ends of S1, S2, the germanium diode GE-D6, and the germanium diode GE-D5 are all electrically connected to one end of R8. The other end of R8 is electrically connected to the +5v power supply Vcc.Pin 14 of 74LS1 is electrically connected to the +5V power supply Vcc, and pin 7 of 74LS1 is grounded.

[0015] Furthermore, the second diagnostic circuit module includes 74LS2, C5, R9, D4, D5, D6, D7, LED1, R10, R11, optocoupler OCEP1, germanium diode GE-D7, germanium diode GE-D8, R12, logic NOT gate NOT4, R1, LED2, germanium diode GE-D9, germanium diode GE-D10, germanium diode GE-D11, germanium diode GE-D12, C6 and R14. Pin 1 of 74LS2 is electrically connected to the positive electrode of germanium diode GE-D3. Pin 2 of 74LS2 is respectively electrically connected to one end of C5 and R9. The other end of R9 is grounded, and the other end of C5 is electrically connected to the +5V power supply Vcc. Pins 3, 4, 5 and 6 of 74LS2 are respectively electrically connected to the positive electrodes of D4, D5, D6 and D7. The negative electrodes of D4, D5, D6 and D7 are all electrically connected to R10 and LED1. LED1 is electrically connected to one end of R11, and the other end of R11 is grounded. R10 is electrically connected to the positive electrode of the primary side of optocoupler OCEP1, and the negative electrode of the primary side of optocoupler OCEP1 is grounded. Pin 7 of 74LS2 is grounded. Pins 8 and 9 of 74LS2 are respectively electrically connected to the negative electrodes of germanium diode GE-D8 and germanium diode GE-D7. The positive electrodes of germanium diode GE-D8 and germanium diode GE-D7 are both electrically connected to R12. R12 is electrically connected to the +5V power supply Vcc. The positive electrode of germanium diode GE-D8 is also electrically connected to the input end of logic NOT gate NOT4. The output end of logic NOT gate NOT4 is connected to the alarm output module. Pins 10 and 11 of 74LS2 are respectively electrically connected to the positive electrodes of germanium diode GE-D9 and germanium diode GE-D10. The negative electrodes of germanium diode GE-D9 and germanium diode GE-D10 are both electrically connected to LED2. LED2 is electrically connected to one end of R15, and the other end of R15 is grounded. Pin 12 of 74LS2 is electrically connected to the positive electrode of germanium diode GE-D5. Pin 13 of 74LS2 is electrically connected to C6. Pin 13 of 74LS2 is also electrically connected to the positive electrodes of germanium diode GE-D11 and germanium diode GE-D12. The negative electrode of germanium diode GE-D12 is electrically connected to logic NOT gate NOT1. The negative electrode of germanium diode GE-D11 is electrically connected to one end of R13, and the other end of R13 is grounded. The positive electrodes of germanium diode GE-D11 and germanium diode GE-D12 are also electrically connected to R14. R14 is electrically connected to the +5V power supply Vcc. Pin 14 of 74LS2 is electrically connected to the +5V power supply Vcc. The negative electrode of germanium diode GE-D11 is also connected to the alarm output module.

[0016] Further, the alarm output module includes LED3, logic NOT gate NOT5, R16, optocoupler OCEP2, R17, R18 and optocoupler OCEP3. Logic NOT gate NOT4 is electrically connected to logic NOT gate NOT5 and R16 respectively. Logic NOT gate NOT5 is electrically connected to LED3. LED3 is electrically connected to R17. R17 is electrically connected to the positive pole of the primary side of optocoupler OCEP3. The negative pole of the primary side of optocoupler OCEP3 is grounded. The positive pole of the secondary side of optocoupler OCEP3 is electrically connected to R18. R18 is electrically connected to the +12v power supply. The negative pole of the secondary side of optocoupler OCEP3 is electrically connected to one end of the unit sound and light alarm. The other end of the unit sound and light alarm is grounded. R16 is electrically connected to the positive pole of the primary side of optocoupler OCEP2. The negative pole of the primary side of optocoupler OCEP2 is grounded. The secondary side of optocoupler OCEP2 is electrically connected to the alarm digital output circuit.

[0017] The utility model has the following technical effects:

[0018] Based on the voltage generated by the DC current transformer for current acquisition, the utility model uses the signal amplitude discrimination and shaping module to generate a square wave voltage signal. The first diagnostic circuit module and the second diagnostic circuit module of the timing diagnosis circuit module use the integrated digital chip circuit to calculate the time length of the square wave signal that can reflect the discharge (charge) current time length of the resistor-capacitor element and compare it with the standard value for judgment, and output the diagnostic result. When the diagnostic result is unqualified, the alarm output module issues an alarm;

[0019] The signal amplitude discrimination and shaping module of the utility model discriminates and shapes the amplitude of the voltage signal output by the DC current transformer and outputs a square wave as the signal source of the first diagnostic circuit module and the second diagnostic circuit module;

[0020] The first diagnostic circuit module and the second diagnostic circuit module of the utility model can calculate the time length of the square wave reflecting the capacitor discharge duration and compare it with the standard value. If it is unqualified, the alarm condition is output;

[0021] The first diagnostic circuit module and the second diagnostic circuit module of the utility model are designed with a circuit that can be selected through an 8-bit coding switch, with 256 optional parameters. Dozens of resistor-capacitor circuit combinations commonly used in the railway signal profession with capacitor capacitances ranging from 50uF to 3300uF, resistors from 51 to 1000 ohms, and relay coil resistances of 850 or 1700 ohms can be selected and applied. Larger detection ranges can also be applied by changing the parameters of the main components in the detection circuit to meet more refined detection requirements;

[0022] When the circuit of the utility model is normal and a square wave with a specified time length is detected, it drives an electronic switch to open. Otherwise, it cuts off the alarm detection digital signal and drives the sound and light alarm circuit at the same time;

[0023] The detection and diagnosis circuit of the present utility model has no electrical connection with existing railway signal equipment, meets the "fail-safe" principle, has a simple detection circuit structure, low working energy consumption, and high safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the circuit principle framework of a detection and diagnosis circuit for resistance-capacitance elements of a slow-suction and slow-release circuit of a signal relay according to the present utility model;

[0026] Figure 2 It is a circuit schematic diagram of a detection and diagnosis circuit for resistance-capacitance elements of a slow-suction and slow-release circuit of a signal relay according to the present utility model.

[0027] The reference numerals in the figure respectively represent:

[0028] 1. DC current transformer; 2. Power supply module; 3. Signal amplitude discrimination and shaping module; 4. Timing diagnosis circuit module; 41. First diagnosis circuit module; 42. Second diagnosis circuit module; 5. Alarm output module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] The following further describes the present utility model with reference to the embodiments.

[0031] The "left", "right", "front", "rear", "upper", and "lower" mentioned in the following description are oriented in the perspective direction of the front view.

[0032] Embodiment 1

[0033] Please refer to the accompanying specification Figure 1-2 , a detection and diagnosis circuit for resistance-capacitance elements of a slow-suction and slow-release circuit of a signal relay;

[0034] R represents resistance, D represents diode, GE-D represents germanium diode, LED represents light-emitting diode, C represents capacitor, OCEP represents optocoupler element, 74LS represents 74LS chip, and NOT represents logic NOT gate;

[0035] It includes a DC current transformer 1. The input terminals of the DC current transformer 1 are respectively electrically connected to the +12v and -12v power supplies. The output terminal of the DC current transformer 1 is connected to a power supply module 2 and a signal amplitude discrimination and shaping module 3. The output terminal of the DC current transformer 1 is also electrically connected to one end of D8 and R19. The signal amplitude discrimination and shaping module 3 is connected to a timing diagnosis circuit module 4, and the timing diagnosis circuit module 4 is connected to an alarm output module 5. R19 is in parallel with C7, and the other ends of D8 and R19 are both grounded;

[0036] The timing diagnosis circuit module 4 includes a first diagnosis circuit module 41 and a second diagnosis circuit module 42. The first diagnosis circuit module 41 and the second diagnosis circuit module 42 are connected. Both the first diagnosis circuit module 41 and the second diagnosis circuit module 42 are connected to the signal amplitude discrimination and shaping module 3, and the second diagnosis circuit module 42 is connected to the alarm output module 5.

[0037] Based on the voltage generated by the DC current transformer 1 collecting current, the signal amplitude discrimination and shaping module 3 is used to generate a square-wave voltage signal. The first diagnosis circuit module 41 and the second diagnosis circuit module 42 of the timing diagnosis circuit module 4 use an integrated digital chip circuit to calculate the time length of the square-wave signal that can reflect the charging (discharging) current time length of the resistor-capacitor element and compare it with the standard value for judgment, and output a diagnosis result. When the diagnosis result is unqualified, the alarm output module 5 issues an alarm.

[0038] The power supply module 2 includes a voltage converter, D1, R1, D2, D3, and C1. The negative electrode of D1 is electrically connected to the input terminal of the voltage converter. The output terminal of the voltage converter is electrically connected to the positive electrode of D2. The intersection of the negative electrodes of D2 and D3 serves as the +5v power supply Vcc output terminal. Both the first diagnosis circuit module 41 and the second diagnosis circuit module 42 use the +5v power supply Vcc. Both ends of R1 are respectively electrically connected to the positive electrodes of D2 and D3. The positive electrode of D3 is electrically connected to the positive electrode of C1, and the negative electrode of C1 is electrically connected to the negative electrode of the voltage converter.

[0039] The positive electrode of D1 is electrically connected to the positive electrode of the +12v power supply, and the negative electrode of the voltage converter is electrically connected to the negative output terminal of the DC current transformer 1.

[0040] Preferably, the power supply module 2 is an independently set DC12V to DC5V circuit, and a large-capacity Faraday C1 is used to achieve the voltage stabilization and instantaneous current continuation functions.

[0041] The power supply module 2 converts the voltage of 12V into 5V through a voltage converter;

[0042] The signal amplitude discrimination and shaping module 3 includes a logic NOT gate NOT1, a logic NOT gate NOT2, and a logic NOT gate NOT3. The positive pole of the output end of the DC current transformer 1 is electrically connected to one end of the logic NOT gate NOT1. The other end of the logic NOT gate NOT1 is electrically connected to one end of the logic NOT gate NOT2. The other end of the logic NOT gate NOT2 is electrically connected to the logic NOT gate NOT3. The logic NOT gate NOT1 is connected to the second diagnostic circuit module 42, and both the logic NOT gate NOT2 and the logic NOT gate NOT3 are connected to the first diagnostic circuit module 41.

[0043] The signal amplitude discrimination and shaping module 3 discriminates the amplitude of the voltage signal output by the DC current transformer 1 and shapes it into a square wave as the signal source of the first diagnostic circuit module 41 and the second diagnostic circuit module 42;

[0044] The first diagnostic circuit module 41 includes a 555 chip A, C2, R2, a circuit board test output port, R3, C3, R4, 74LS1, R5, a germanium diode GE-D1, S1, R6, S2, a germanium diode GE-D2, a germanium diode GE-D3, a germanium diode GE-D4, a germanium diode GE-D5, a germanium diode GE-D6, C4, R7, and R8. The pin 1 of the 555 chip A is grounded. The pin 2 of the 555 chip A is electrically connected to one end of C2 and the pin 6 of the 555 chip A respectively. The other end of C2 is electrically connected to the pin 1 of the 555 chip A. The pin 3 of the 555 chip A is electrically connected to the pin 1 of 74LS1. The pin 4 of the 555 chip A is electrically connected to one end of R3. The other end of R3 is grounded. The pin 4 of the 555 chip A is also electrically connected to the logic NOT gate NOT2 and the circuit board test output port respectively. The circuit board test output port is electrically connected to the +5v power supply Vcc. The pin 5 of the 555 chip A is electrically connected to one end of C3. The other end of C3 is grounded. Both ends of R5 are electrically connected to the pin 6 and 7 of the 555 chip A respectively. Both ends of R2 are electrically connected to the pin 7 and 8 of the 555 chip A respectively. The pin 8 of the 555 chip A is also electrically connected to the +5v power supply Vcc. Both ends of R4 are electrically connected to the logic NOT gate NOT3 and the pin 2 of 74LS1 respectively. The pin 2 of 74LS1 is also electrically connected to the pin 12 of 74LS1 and one end of R7 respectively. The other end of R7 is grounded. C4 is connected in parallel with R7. The pin 3 of 74LS1 is electrically connected to the 0 terminal of the circuit board test output port. The pin 4 of 74LS1 and the 1 terminal of the circuit board test output port are electrically connected. The pin 5 of 74LS1 and the 2 terminal of the circuit board test output port are electrically connected. The pin 6 of 74LS1 is electrically connected to the pin 13 of 74LS1 and is electrically connected to the 3 terminal of the circuit board test output port. The pin 8 of 74LS1 is electrically connected to the 7 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D6 respectively. The pin 9 of 74LS1 is electrically connected to the 6 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D4 respectively. The positive electrode of the germanium diode GE-D4 is electrically connected to R6 and is electrically connected to the positive electrode of the germanium diode GE-D3. R6 is electrically connected to the +5v power supply Vcc. The pin 10 of 74LS1 is electrically connected to the 5 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D5 respectively. The positive electrode of the germanium diode GE-D5 is electrically connected to the positive electrode of the germanium diode GE-D4 and is electrically connected to the negative electrode of the germanium diode GE-D3. The positive electrodes of the germanium diode GE-D3 and the germanium diode GE-D5 are both connected to the second diagnostic circuit module 42. The pin 11 of 74LS1 is electrically connected to the 4 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D2 respectively. The pin 13 of 74LS1 is electrically connected to the 3 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D1 respectively. The positive electrodes of the germanium diode GE-D2 and the germanium diode GE-D1 are electrically connected to S2 and one end of S1 respectively. The other ends of S1, S2, the germanium diode GE-D6, and the germanium diode GE-D5 are all electrically connected to one end of R8.The other end of R8 is electrically connected to the +5V power supply Vcc, the pin 14 of 74LS1 is electrically connected to the +5V power supply Vcc, and the pin 7 of 74LS1 is grounded.

[0045] The second diagnostic circuit module 42 includes 74LS2, C5, R9, D4, D5, D6, D7, LED1, R10, R11, optocoupler OCEP1, germanium diode GE-D7, germanium diode GE-D8, R12, logic NOT gate NOT4, R1, LED2, germanium diode GE-D9, germanium diode GE-D10, germanium diode GE-D11, germanium diode GE-D12, C6 and R14. The pin 1 of 74LS2 is electrically connected to the positive electrode of germanium diode GE-D3. The pin 2 of 74LS2 is respectively electrically connected to one end of C5 and R9. The other end of R9 is grounded. The other end of C5 is electrically connected to the +5V power supply Vcc. The pins 3, 4, 5 and 6 of 74LS2 are respectively electrically connected to the positive electrodes of D4, D5, D6 and D7. The negative electrodes of D4, D5, D6 and D7 are all electrically connected to R10 and LED1. LED1 is electrically connected to one end of R11. The other end of R11 is grounded. R10 is electrically connected to the positive electrode of the primary side of optocoupler OCEP1. The negative electrode of the primary side of optocoupler OCEP1 is grounded. The pin 7 of 74LS2 is grounded. The pins 8 and 9 of 74LS2 are respectively electrically connected to the negative electrodes of germanium diode GE-D8 and germanium diode GE-D7. The positive electrodes of germanium diode GE-D8 and germanium diode GE-D7 are both electrically connected to R12. R12 is electrically connected to the +5V power supply Vcc. The positive electrode of germanium diode GE-D8 is also electrically connected to the input end of logic NOT gate NOT4. The output end of logic NOT gate NOT4 is connected to the alarm output module 5. The pins 10 and 11 of 74LS2 are respectively electrically connected to the positive electrodes of germanium diode GE-D9 and germanium diode GE-D10. The negative electrodes of germanium diode GE-D9 and germanium diode GE-D10 are both electrically connected to LED2. LED2 is electrically connected to one end of R15. The other end of R15 is grounded. The pin 12 of 74LS2 is electrically connected to the positive electrode of germanium diode GE-D5. The pin 13 of 74LS2 is electrically connected to C6. The pin 13 of 74LS2 is also electrically connected to the positive electrodes of germanium diode GE-D11 and germanium diode GE-D12. The negative electrode of germanium diode GE-D12 is electrically connected to logic NOT gate NOT1. The negative electrode of germanium diode GE-D11 is electrically connected to one end of R13. The other end of R13 is grounded. The positive electrodes of germanium diode GE-D11 and germanium diode GE-D12 are also electrically connected to R14. R14 is electrically connected to the +5V power supply Vcc. The pin 14 of 74LS2 is electrically connected to the +5V power supply Vcc. The negative electrode of germanium diode GE-D11 is also connected to the alarm output module 5.

[0046] The first diagnostic circuit module 41 and the second diagnostic circuit module 42 can calculate the square wave time length reflecting the capacitor discharge duration and compare it with the standard value. If it is unqualified, the alarm condition is output.

[0047] The first diagnostic circuit module 41 and the second diagnostic circuit module 42 are designed with circuits that can be selected through an 8-bit coding switch. There are 256 optional parameters, and dozens of resistor-capacitor circuit combinations within the ranges of capacitance commonly used in railway signal specialties from 50 uF to 3300 uF, resistance from 51 to 1000 ohms, and relay coil resistance of 850 or 1700 ohms can all be selected and applied. Moreover, a larger detection range can be achieved by changing the parameters of the main components in the detection circuit to meet more refined detection requirements.

[0048] The alarm output module 5 includes LED3, logic NOT gate NOT5, R16, optocoupler OCEP2, R17, R18, and optocoupler OCEP3. The logic NOT gate NOT4 is electrically connected to the logic NOT gate NOT5 and R16 respectively. The logic NOT gate NOT5 is electrically connected to LED3. LED3 is electrically connected to R17. R17 is electrically connected to the positive electrode of the primary side of the optocoupler OCEP3. The negative electrode of the primary side of the optocoupler OCEP3 is grounded. The positive electrode of the secondary side of the optocoupler OCEP3 is electrically connected to R18. R18 is electrically connected to the +12v power supply. The negative electrode of the secondary side of the optocoupler OCEP3 is electrically connected to one end of the unit acoustic-optic alarm. The other end of the unit acoustic-optic alarm is grounded. R16 is electrically connected to the positive electrode of the primary side of the optocoupler OCEP2. The negative electrode of the primary side of the optocoupler OCEP2 is grounded. The secondary side of the optocoupler OCEP2 is electrically connected to the alarm switch quantity output circuit.

[0049] When the circuit is normal and a square wave with a specified time length is detected, it drives to open an electronic switch; otherwise, it cuts off the alarm detection switch quantity and simultaneously drives the acoustic-optic alarm circuit.

[0050] The detection and diagnostic circuit has no electrical connection with existing railway signal equipment, meeting the "fail-safe" principle. The detection circuit has a simple structure, low working energy consumption, and high safety and reliability.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detection and diagnosis circuit for the resistor and capacitor components of a signal relay slow-suction and slow-release circuit, characterized in that: The invention comprises a direct current transformer (1), wherein the input end of the direct current transformer (1) is electrically connected to a +12V power supply and a -12V power supply respectively, the output end of the direct current transformer (1) is connected to a power supply module (2) and a signal amplitude detection and shaping module (3), the output end of the direct current transformer (1) is also electrically connected to one end of D8 and R19, the signal amplitude detection and shaping module (3) is connected to a timing diagnosis circuit module (4), the timing diagnosis circuit module (4) is connected to an alarm output module (5), R19 is connected in parallel with C7, and the other ends of D8 and R19 are both grounded; The timing diagnosis circuit module (4) comprises a first diagnosis circuit module (41) and a second diagnosis circuit module (42), the first diagnosis circuit module (41) and the second diagnosis circuit module (42) are connected, the first diagnosis circuit module (41) and the second diagnosis circuit module (42) are both connected to the signal amplitude detection and shaping module (3), and the second diagnosis circuit module (42) is connected to the alarm output module (5).

2. The detection and diagnosis circuit of the RC element of the signal relay slow-suction and slow-release circuit according to claim 1 is characterized in that: The power supply module (2) comprises a voltage converter, D1, R1, D2, D3 and C1, the negative pole of D1 is electrically connected to the input end of the voltage converter, the output end of the voltage converter is electrically connected to the positive pole of D2, the intersection of the negative pole of D2 and the negative pole of D3 serves as a +5v power supply Vcc output terminal, the first diagnostic circuit module (41) and the second diagnostic circuit module (42) both use a +5v power supply Vcc, the two ends of R1 are electrically connected to the positive poles of D2 and D3 respectively, the positive pole of D3 is electrically connected to the positive pole of C1, and the negative pole of C1 is electrically connected to the negative pole of the voltage converter.

3. The detection and diagnosis circuit of the RC element of the signal relay slow-suction and slow-release circuit according to claim 2, characterized in that: The positive pole of D1 is electrically connected to the positive pole of the +12V power supply, and the negative pole of the voltage converter is electrically connected to the negative pole of the output end of the DC current transformer (1).

4. The detection and diagnosis circuit of the RC element of the signal relay slow-suction and slow-release circuit according to claim 3 is characterized in that: The power module (2) is an independently arranged DC12V to DC5V circuit.

5. The detection and diagnosis circuit of the RC element of the signal relay slow-suction and slow-release circuit according to claim 4, characterized in that: The signal amplitude detection and shaping module (3) comprises a logic NOT gate NOT1, a logic NOT gate NOT2 and a logic NOT gate NOT3; the positive pole of the output end of the DC current transformer (1) is electrically connected to one end of the logic NOT gate NOT1; the other end of the logic NOT gate NOT1 is electrically connected to one end of the logic NOT gate NOT2; the other end of the logic NOT gate NOT2 is electrically connected to the logic NOT gate NOT3; the logic NOT gate NOT1 is connected to the second diagnostic circuit module (42); and the logic NOT gate NOT2 and the logic NOT gate NOT3 are both connected to the first diagnostic circuit module (41).

6. The detection and diagnosis circuit of the RC element of the signal relay slow-suction and slow-release circuit according to claim 5, characterized in that: The first diagnostic circuit module (41) comprises a 555 chip A, C2, R2, a circuit board test output port, R3, C3, R4, 74LS1, R5, a germanium diode GE-D1, S1, R6, S2, a germanium diode GE-D2, a germanium diode GE-D3, a germanium diode GE-D4, a germanium diode GE-D5, a germanium diode GE-D6, C4, R7 and R8, wherein a pin 1 of the 555 chip A is grounded, a pin 2 of the 555 chip A is electrically connected to one end of C2 and a pin 6 of the 555 chip A respectively, the other end of C2 is electrically connected to a pin 1 of the 555 chip A, a pin 3 of the 555 chip A is electrically connected to a pin 1 of the 74LS1, a pin 4 of the 555 chip A is electrically connected to one end of R3, the other end of R3 is grounded, and the 555 Chip A pin 4 is also electrically connected to the logic NOT gate NOT2 and the circuit board test output port, 555 chip A pin 5 is electrically connected to one end of C3, the other end of C3 is grounded, both ends of R5 are electrically connected to 555 chip A pins 6 and 7, both ends of R2 are electrically connected to 555 chip A pins 7 and 8, 555 chip A pin 8 is also electrically connected to +5v power supply Vcc, both ends of R4 are electrically connected to the logic NOT gate NOT3 and 74LS1 pin 2, 74LS1 pin 2 is also electrically connected to 74LS1 pin 12 and one end of R7, the other end of R7 is grounded, C4 is connected in parallel with R7, 74LS1 pin 3 is electrically connected to the 0 terminal of the circuit board test output port, 74LS1 pin 4 is electrically connected to the 1 terminal of the circuit board test output port Electrical connection, 74LS1 pin 5 is electrically connected to terminal 2 of the circuit board test output port, 74LS1 pin 6 is electrically connected to 74LS1 pin 13 and electrically connected to terminal 3 of the circuit board test output port, 74LS1 pin 8 is electrically connected to terminal 7 of the circuit board test output port and the cathode of the germanium diode GE-D6, 74LS1 pin 9 is electrically connected to terminal 6 of the circuit board test output port and the cathode of the germanium diode GE-D4, the anode of the germanium diode GE-D4 is electrically connected to R6 and electrically connected to the anode of the germanium diode GE-D3, R6 is electrically connected to the +5v power supply Vcc, 74LS1 pin 10 is electrically connected to terminal 5 of the circuit board test output port and the cathode of the germanium diode GE-D5, the germanium diode GE- The positive electrode of D5 is electrically connected to the positive electrode of the germanium diode GE-D4 and to the negative electrode of the germanium diode GE-D3. The positive electrodes of the germanium diode GE-D3 and the germanium diode GE-D5 are both connected to the second diagnostic circuit module (42). The pin 11 of 74LS1 is respectively electrically connected to the 4 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D2. The pin 13 of 74LS1 is respectively electrically connected to the 3 terminal of the circuit board test output port and the negative electrode of the germanium diode GE-D1. The positive electrodes of the germanium diode GE-D2 and the germanium diode GE-D1 are respectively electrically connected to one end of S2 and one end of S1. The other ends of S1 and S2, the germanium diode GE-D6 and the germanium diode GE-D5 are all electrically connected to one end of R8. The other end of R8 is electrically connected to the +5V power supply Vcc.74LS1 pin 14 is electrically connected to the +5v power supply Vcc, and 74LS1 pin 7 is grounded.

7. The detection and diagnosis circuit of the RC element of the signal relay slow-suction and slow-release circuit according to claim 6, characterized in that: The second diagnostic circuit module (42) comprises 74LS2, C5, R9, D4, D5, D6, D7, LED1, R10, R11, optical coupler OCEP1, germanium diode GE-D7, germanium diode GE-D8, R12, logic NOT gate NOT4, R1, LED2, germanium diode GE-D9, germanium diode GE-D10, germanium diode GE-D11, germanium diode GE-D12, C6 and R14, pin 1 of 74LS2 is electrically connected to the positive electrode of germanium diode GE-D3, pin 2 of 74LS2 is electrically connected to one end of C5 and R9 respectively, and the other end of R9 is grounded , the other end of C5 is electrically connected to the +5v power supply Vcc, 74LS2 pins 3, 4, 5 and 6 are electrically connected to the positive electrodes of D4, D5, D6 and D7 respectively, the negative electrodes of D4, D5, D6 and D7 are electrically connected to R10 and LED1, LED1 is electrically connected to one end of R11, the other end of R11 is grounded, R10 is electrically connected to the positive electrode of the primary side of the optocoupler OCEP1, the negative electrode of the primary side of the optocoupler OCEP1 is grounded, 74LS2 pin 7 is grounded, 74LS2 pins 8 and 9 are electrically connected to the negative electrodes of the germanium diode GE-D8 and the germanium diode GE-D7 respectively, the germanium diode GE-D8 and the germanium diode GE -D7 positive electrode is electrically connected to R12, R12 is electrically connected to +5v power supply Vcc, the positive electrode of germanium diode GE-D8 is also electrically connected to the input end of logic NOT gate NOT4, the output end of logic NOT gate NOT4 is connected to alarm output module (5), 74LS2 pins 10 and 11 are electrically connected to the positive electrodes of germanium diode GE-D9 and germanium diode GE-D10 respectively, the negative electrodes of germanium diode GE-D9 and germanium diode GE-D10 are electrically connected to LED2, LED2 is electrically connected to one end of R15, the other end of R15 is grounded, 74LS2 pin 12 is electrically connected to the positive electrode of germanium diode GE-D5, 74 LS2 pin 13 is electrically connected to C6, 74LS2 pin 13 is also electrically connected to the positive electrodes of germanium diode GE-D11 and germanium diode GE-D12, the negative electrode of germanium diode GE-D12 is electrically connected to logic NOT gate NOT1, the negative electrode of germanium diode GE-D11 is electrically connected to one end of R13, the other end of R13 is grounded, the positive electrodes of germanium diode GE-D11 and germanium diode GE-D12 are also electrically connected to R14, R14 is electrically connected to +5v power supply Vcc, 74LS2 pin 14 is electrically connected to +5v power supply Vcc, and the negative electrode of germanium diode GE-D11 is also connected to alarm output module (5).

8. The detection and diagnosis circuit of the RC element of the signal relay slow-suction and slow-release circuit according to claim 7, characterized in that: The alarm output module (5) comprises LED3, logic NOT gate NOT5, R16, optical coupler OCEP2, R17, R18 and optical coupler OCEP3, logic NOT gate NOT4 is electrically connected to logic NOT gate NOT5 and R16 respectively, logic NOT gate NOT5 is electrically connected to LED3, LED3 is electrically connected to R17, R17 is electrically connected to the positive pole of the primary side of optical coupler OCEP3, the negative pole of the primary side of optical coupler OCEP3 is grounded, the positive pole of the secondary side of optical coupler OCEP3 is electrically connected to R18, R18 is electrically connected to a +12V power supply, the negative pole of the secondary side of optical coupler OCEP3 is electrically connected to one end of the unit sound and light alarm, the other end of the unit sound and light alarm is grounded, R16 is electrically connected to the positive pole of the primary side of optical coupler OCEP2, the negative pole of the primary side of optical coupler OCEP2 is grounded, and the secondary side of optical coupler OCEP2 is electrically connected to the alarm switch output circuit.

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