阅读说明：本技术 一种自动识别的解锁装置 (Automatic unlocking device of discernment ) 是由 马文宣 贾鹏举 杨翠霞 李�杰 姚佳 张占喜 刘云洁 郜涛 马文杰 赵满意 于 2019-11-07 设计创作，主要内容包括：本发明涉及一种自动识别的解锁装置,包括整流滤波模块、隔离放大模块和控制模块,所述整流滤波模块的输出信号经过所述隔离放大模块后送入控制模块,所述控制模块包括控制单元,所述控制单元上连接有电磁继电器,所述电磁继电器与牵引电磁体连接,隔离放大模块包括运算放大器U1A、运算放大器U2A、线性光耦和运算放大器U3A,整流滤波模块包括整流桥D1、稳压器；本发明具有控制合理、识别效果好、减少误操作的优点。(The invention relates to an automatic identification unlocking device, which comprises a rectifying and filtering module, an isolation amplification module and a control module, wherein an output signal of the rectifying and filtering module is sent into the control module after passing through the isolation amplification module, the control module comprises a control unit, an electromagnetic relay is connected to the control unit, the electromagnetic relay is connected with a traction electromagnet, the isolation amplification module comprises an operational amplifier U1A, an operational amplifier U2A, a linear optical coupler and an operational amplifier U3A, and the rectifying and filtering module comprises a rectifier bridge D1 and a voltage stabilizer; the invention has the advantages of reasonable control, good recognition effect and reduction of misoperation.)

1. The utility model provides an automatic unlocking device of discernment, includes rectification filter module, keeps apart and enlargies module and control module, its characterized in that: the output signal of the rectification filtering module is sent to the control module after passing through the isolation amplifying module, the control module comprises a control unit, an electromagnetic relay is connected to the control unit, and the electromagnetic relay is connected with a traction electromagnet;

the isolation amplification module comprises an operational amplifier U1A, an operational amplifier U2A, a linear optical coupler and an operational amplifier U3A, wherein the output end of the operational amplifier U1A is connected with a resistor R2, the inverting input end of the operational amplifier U1A is connected with the output end, the non-inverting input end of the operational amplifier U1A is connected with the output end of the rectification filter module, the other end of a resistor R2 is respectively connected with the inverting input end of the operational amplifier U2A, a capacitor C5 and the PD 1-end of the linear optical coupler, the other end of the capacitor C5 is respectively connected with the output end of the operational amplifier U2A and the resistor R3, the non-inverting input end of the operational amplifier U2A is grounded, the other end of the resistor R8 is connected with the LED-end of the linear optical coupler, the PD2+ end of the linear optical coupler is connected with the non-inverting input end of the operational amplifier U3A, and the PD 2-end of, The capacitor C6 is connected with the resistor R4, and the other ends of the resistor R4 and the capacitor C6 are also connected with the output end of the operational amplifier U3A.

2. The automatically recognized unlocking device of claim 1, wherein: the rectifying and filtering module comprises a rectifying bridge D1 and a voltage stabilizer, wherein the input end of a rectifier D1 is connected with the output end of a transformer T1, the output end of the rectifier D1 is respectively connected with capacitors C1, C2, C3, C4 and R1 in parallel, the input end of the voltage stabilizer is connected with the output end of a rectifying bridge D1, the output end of the voltage stabilizer is connected with one ends of the capacitors C3, C4 and a resistor R1, and the grounding end of the voltage stabilizer is grounded.

3. The automatically recognized unlocking device of claim 1, wherein: the control unit is an 89C52 singlechip.

4. The automatically recognized unlocking device of claim 1, wherein: the positive power supply ends of the operational amplifier U1A, the operational amplifier U2A and the operational amplifier U3A are connected with a +5V power supply, and the negative power supply end is grounded.

Technical Field

The invention relates to the field of automatic unlocking of power equipment, in particular to an automatic identification unlocking device.

Background

In the existing power system, the unlocking of double buses needs manual identification for unlocking, one line can select an I bus or an II bus, the I bus and the II bus are two sets of equipment, the I bus is provided with a grounding switch, a mechanical locking device is arranged between the I bus and the II bus, and only one bus side of one line is connected with a grounding switch, the locking device cannot be operated when any one of the I bus or the II bus is electrified, so that the grounding switch cannot be grounded during normal use and can be grounded only during maintenance or test, and therefore manual misoperation can be caused, the double buses cannot be unlocked or the unlocking is failed; therefore, it is necessary to provide an automatic identification unlocking device which is reasonable in control, good in identification effect and capable of reducing misoperation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the automatic identification unlocking device which is reasonable in control, good in identification effect and capable of reducing misoperation.

The purpose of the invention is realized as follows: an automatic identification unlocking device comprises a rectification filter module, an isolation amplification module and a control module, wherein an output signal of the rectification filter module is sent to the control module after passing through the isolation amplification module, the control module comprises a control unit, an electromagnetic relay is connected to the control unit, and the electromagnetic relay is connected with a traction electromagnet;

the isolation amplification module comprises an operational amplifier U1A, an operational amplifier U2A, a linear optical coupler and an operational amplifier U3A, wherein the output end of the operational amplifier U1A is connected with a resistor R2, the inverting input end of the operational amplifier U1A is connected with the output end, the non-inverting input end of the operational amplifier U1A is connected with the output end of the rectification filter module, the other end of a resistor R2 is respectively connected with the inverting input end of the operational amplifier U2A, a capacitor C5 and the PD 1-end of the linear optical coupler, the other end of the capacitor C5 is respectively connected with the output end of the operational amplifier U2A and the resistor R3, the non-inverting input end of the operational amplifier U2A is grounded, the other end of the resistor R8 is connected with the LED-end of the linear optical coupler, the PD2+ end of the linear optical coupler is connected with the non-inverting input end of the operational amplifier U3A, and the PD 2-end of, The capacitor C6 is connected with the resistor R4, and the other ends of the resistor R4 and the capacitor C6 are also connected with the output end of the operational amplifier U3A.

The rectifying and filtering module comprises a rectifying bridge D1 and a voltage stabilizer, wherein the input end of a rectifier D1 is connected with the output end of a transformer T1, the output end of the rectifier D1 is respectively connected with capacitors C1, C2, C3, C4 and R1 in parallel, the input end of the voltage stabilizer is connected with the output end of a rectifying bridge D1, the output end of the voltage stabilizer is connected with one ends of the capacitors C3, C4 and a resistor R1, and the grounding end of the voltage stabilizer is grounded.

The control unit is 89C52 singlechip.

The positive power supply ends of the operational amplifier U1A, the operational amplifier U2A and the operational amplifier U3A are connected with a +5V power supply, and the negative power supply end is grounded.

The invention has the beneficial effects that: the grounding operation of the grounding switch is completed by utilizing the electromagnetic relay and the traction electromagnet, 220V domestic electricity is taken and subjected to voltage reduction treatment by the transformer, the treated current is subjected to stable current output through the rectifying and filtering module, the output current is subjected to isolation through the isolation and amplification module, the tested object and the test circuit are protected, the influence of environmental interference on the test circuit is reduced, the output current is output to the control unit after passing through the isolation and amplification module, the control unit obtains a control signal to drive a coil on the electromagnetic relay to be electrified and drive the traction electromagnet to move, and therefore the action of the grounding switch is controlled; the invention has the advantages of reasonable control, good recognition effect and reduction of misoperation.

Drawings

Fig. 1 is a circuit diagram of a rectifying and filtering module according to the present invention.

Fig. 2 is a circuit diagram of an isolated amplification module of the present invention.

Fig. 3 is a circuit diagram of a control unit of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.