Relay safety drive circuit for optical communication inter-station safety information transmission system

Abstract

The application relates to a relay safety driving circuit for an optical communication station inter-security information transmission system, which comprises a first optical coupler, a second optical coupler, a first rectifier module, a second rectifier module and a switching tube, the input ends of the first optical coupler and the second optical coupler are connected to an upper controller, the positive pole of the input end of the first rectifier module is connected to the positive pole of a power supply, the negative pole is connected to the negative pole of the power supply through the output end of the first optical coupler, the output end is connected to the control pole of the switching tube through the output end of the second optical coupler, the positive pole of the input end of the second rectifier module is connected to the positive pole of the power supply, the negative pole is connected to the negative pole of the power supply through the switching tube, and the output end is connected to a relay. Compared with the prior art, the application is safe and reliable by designing multiple discrete elements, and only when both the optical couplers are turned on, the output is obtained, otherwise the output is guided to the safe side without electricity.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical communication station-to-station security information transmission system, in particular to a relay safety driving circuit for the optical communication station-to-station security information transmission system. BACKGROUND

[0002] The optical communication station-to-station security information transmission system is a device for realizing the transmission of station-to-station relay information through optical fiber communication, which converts the relay signals in the 64D relay rack of the station into digital signals, transmits the digital signals to the adjacent station through the optical fiber channel, receives the digital signals from the adjacent station through optical fiber communication, and converts the digital signals into relay signals for the 64D relay rack. The correct driving of the relay signals is related to the safety and efficiency of train operation. However, the existing relay driving circuit has a high failure rate, resulting in low reliability of the optical communication station-to-station security information transmission system. SUMMARY

[0003] The purpose of the present application is to provide a relay safety driving circuit for the optical communication station-to-station security information transmission system, which is designed with multiple discrete components. Only when both optical couplings are turned on, there will be an output, otherwise the output will be directed to the safe side without electricity, which is safe and reliable.

[0004] The purpose of the present application can be achieved by the following technical solutions:

[0005] A relay safety driving circuit for the optical communication station-to-station security information transmission system, comprising: a first optical coupling, a second optical coupling, a first rectifier module, a second rectifier module and a switching tube, the input ends of the first optical coupling and the second optical coupling are connected to an upper controller,

[0006] the positive electrode of the input end of the first rectifier module is connected to the positive electrode of a power supply, the negative electrode is connected to the negative electrode of the power supply through the output end of the first optical coupling, and the output end is connected to the control electrode of the switching tube through the output end of the second optical coupling,

[0007] the positive electrode of the input end of the second rectifier module is connected to the positive electrode of the power supply, the negative electrode is connected to the negative electrode of the power supply through the switching tube, and the output end is connected to a relay.

[0008] The output end of the first optical coupling is connected in parallel with a first voltage stabilizing tube.

[0009] The first rectifier module comprises a first transformer, a first rectifier bridge, a first capacitor and a first adjusting resistor, the first capacitor and the first adjusting resistor are connected in parallel, the positive electrode of the input end of the first transformer is connected to the positive electrode of the power supply, the negative electrode is connected to the negative electrode of the power supply through the output end of the first optical coupling, and the positive electrode and the negative electrode of the output end are connected to the positive electrode and the negative electrode of the first capacitor, respectively, the positive electrode of the first capacitor is connected to the output end of the second optical coupling, and the negative electrode is connected to the negative electrode of the power supply.

[0010] The second current-limiting resistor is arranged between the first capacitor and the second optocoupler.

[0011] The first current-limiting resistor is arranged between the first transformer and the first optocoupler.

[0012] The first regulating resistor is a fixed resistor.

[0013] The switch tube is a triode, the base of the triode is connected to the second optocoupler, the collector is connected to the second rectifier module, and the emitter is connected to the negative pole of the power supply.

[0014] The second voltage stabilizing tube is connected between the collector and the emitter of the triode.

[0015] The second rectifier module comprises a second transformer, a second rectifier bridge, a second capacitor and a second regulating resistor, the second capacitor and the second regulating resistor are connected in parallel, the positive pole of the input end of the second transformer is connected to the positive pole of the power supply, the negative pole is connected to the negative pole of the power supply through the switch tube, and the positive pole and the negative pole of the output end are connected to the positive pole and the negative pole of the second capacitor respectively.

[0016] The second regulating resistor is a fixed resistor.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. By designing multiple discrete components, there is only output when both optocouplers are turned on, otherwise the output will be directed to the safe side without electricity, which is safe and reliable.

[0019] 2. Small size, simple circuit, less peripheral circuit and low cost.

[0020] 3. Large output power and stable output voltage. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The circuit structure diagram of the present application. DETAILED DESCRIPTION

[0022] The present application will be described in detail below in combination with the drawings and specific embodiments. The present embodiment is implemented on the basis of the technical scheme of the present application, and detailed implementation and specific operation process are given, but the protection scope of the present application is not limited to the following examples.

[0023] When the relay of the optical communication station-to-station secure information transmission system is driven, whether the external relay is powered is determined by analyzing the data received from the adjacent station. When the relay needs to be driven, the transmission system outputs a 10KHz square wave to the safety and gate circuit through CPU1 and CPU2, and turns on the 24V power supply of the control system, thereby driving the external relay. When the relay does not need to be driven, the transmission system turns off the output square wave of CPU1 and CPU2, and turns off the 24V power supply of the control system. The safety side of the system is in the off state of the relay, and any failure of the system will lead to the off state of the relay.

[0024] A relay safety driving circuit for an optical communication station-to-station secure information transmission system, as shown in Figure 1 includes a first optocoupler D1, a second optocoupler D2, a first rectifier module, a second rectifier module and a switching tube V3, the input ends of the first optocoupler D1 and the second optocoupler D2 are connected to the upper controller, i.e. the pins of CPU1 and CPU2,

[0025] The positive electrode of the input end of the first rectifier module is connected to the positive electrode of the power supply, the negative electrode is connected to the negative electrode of the power supply through the output end of the first optocoupler D1, and the output end is connected to the control electrode of the switching tube V3 through the output end of the second optocoupler D2. Figure 1 Among them, the positive electrode of the power supply is UI+, and the negative electrode is UI-.

[0026] The positive electrode of the input end of the second rectifier module is connected to the positive electrode of the power supply, the negative electrode is connected to the negative electrode of the power supply through the switching tube V3, and the output end is connected to the relay, i.e. UO+ and UO-.

[0027] The output end of the first optocoupler D1 is connected in parallel with the first voltage stabilizing tube V1.

[0028] The first rectifier module includes a first transformer T1, a first rectifier bridge V2, a first capacitor C1 and a first adjusting resistor R4, the first capacitor C1 and the first adjusting resistor R4 are connected in parallel, the positive electrode of the input end of the first transformer T1 is connected to the positive electrode of the power supply, the negative electrode is connected to the negative electrode of the power supply through the output end of the first optocoupler D1, and the positive electrode and the negative electrode of the output end are respectively connected to the positive electrode and the negative electrode of the first capacitor C1. The positive electrode of the first capacitor C1 is connected to the output end of the second optocoupler D2, and the negative electrode is connected to the negative electrode of the power supply.

[0029] A second current limiting resistor R5 is provided between the first capacitor C1 and the second optocoupler D2.

[0030] A first current limiting resistor R2 is provided between the first transformer T1 and the first optocoupler D1.

[0031] The switching tube V3 is a triode, the base of the triode is connected to the second optocoupler D2, the collector is connected to the second rectifier module, and the emitter is connected to the negative electrode of the power supply.

[0032] The second voltage stabilizer V4 is connected between the collector and the emitter of the triode.

[0033] The second rectifying module comprises a second transformer T2, a second rectifying bridge V5, a second capacitor C4 and a second regulating resistor R8. The second capacitor C4 and the second regulating resistor R8 are connected in parallel. The positive pole of the input end of the second transformer T2 is connected to the positive pole of the power supply. The negative pole is connected to the negative pole of the power supply through the switch tube V3. The positive pole and the negative pole of the output end are connected to the positive pole and the negative pole of the second capacitor C4 respectively.

[0034] The relay driving principle is as follows: when the CPU1 inputs a 10KHz square wave, the input voltage 24V at the UI end generates a 10KHz direct current square wave signal at the left coil of the transformer T1. After the T1 transformer and the V2 rectifying bridge, a direct current pulsating voltage is generated. After the capacitor C1 is filtered, a direct current voltage is generated at the right end of the capacitor C1. The output direct current voltage can be adjusted by changing the resistance value of R4. At this time, if the CPU2 inputs a 10KHz signal to the pin 2 of the optocoupler D2, the B pole of the triode V3 will have a voltage generated. The C and E poles of the triode V3 are turned on. The 24V direct current power supply generates a 10KHz square wave signal through the left coil of the T2, V3 and R7. After the transformer T2 and the rectifying bridge V5 are rectified, a direct current pulsating voltage is generated. After the C4 is filtered, a 24V direct current power supply output is generated at the final outlet UO end, which is used to drive the relay. Therefore, only when the CPU1 and the CPU2 simultaneously output the required pulse square wave, the UO output will have a 24V voltage output. Otherwise, the output will be directed to the safe side without electricity, which ensures the reliability of the system output.

[0035] In some embodiments, the first regulating resistor R4 is a fixed value resistor, and the second regulating resistor R8 is a fixed value resistor, thereby improving stability.

Claims

1. A relay safety drive circuit for an optical communication inter-station safety information transmission system, characterized by, The application relates to a power supply circuit for a high-voltage relay. The power supply circuit comprises a first photocoupler, a second photocoupler, a first rectifier module, a second rectifier module and a switching tube, the input ends of the first photocoupler and the second photocoupler are connected to an upper controller, the positive pole of the input end of the first rectifier module is connected to the positive pole of a power supply, the negative pole is connected to the negative pole of the power supply through the output end of the first photocoupler, the output end is connected to the control pole of the switching tube through the output end of the second photocoupler, and the power supply is a 24V direct-current power supply; the positive pole of the input end of the second rectifier module is connected to the positive pole of the power supply, the negative pole is connected to the negative pole of the power supply through the switching tube, and the output end is connected to a relay; the first rectifier module comprises a first transformer, a first rectifier bridge, a first capacitor and a first regulating resistor, the first capacitor and the first regulating resistor are connected in parallel, the positive pole of the input end of the first transformer is connected to the positive pole of the power supply, the negative pole is connected to the negative pole of the power supply through the output end of the first photocoupler, the positive pole and the negative pole of the output end are respectively connected to the positive pole and the negative pole of the first capacitor, the positive pole of the first capacitor is connected to the output end of the second photocoupler, and the negative pole is connected to the negative pole of the power supply; the switching tube is a triode, the base of the triode is connected to the second photocoupler, the collector is connected to the second rectifier module, and the emitter is connected to the negative pole of the power supply; the second rectifier module comprises a second transformer, a second rectifier bridge, a second capacitor and a second regulating resistor, the second capacitor and the second regulating resistor are connected in parallel, the positive pole of the input end of the second transformer is connected to the positive pole of the power supply, the negative pole is connected to the negative pole of the power supply through the switching tube, and the positive pole and the negative pole of the output end are respectively connected to the positive pole and the negative pole of the second capacitor.

2. The relay safety driver circuit for a secure information transmission system between optical communication stations according to claim 1, wherein the output end of the first photocoupler is connected in parallel with a first voltage stabilizing tube.

3. The relay safety driver circuit for a secure information transmission system between optical communication stations according to claim 1, wherein a second current-limiting resistor is arranged between the first capacitor and the second photocoupler.

4. The relay safety driver circuit for a secure information transmission system between optical communication stations according to claim 1, wherein a first current-limiting resistor is arranged between the first transformer and the first photocoupler.

5. The relay safety driver circuit for a secure information transmission system between optical communication stations according to claim 1, wherein the first regulating resistor is a constant resistor.

6. A relay safety driver circuit for a secure information transmission system between optical communication stations according to claim 1, wherein a second voltage stabilizing tube is connected between the collector and the emitter of the triode.

7. The relay safety driver circuit for a secure information transmission system between optical communication stations according to claim 1, wherein the second regulating resistor is a constant resistor.

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