阅读说明：本技术 一种具有误接线保护报警的遥信信号采集系统 (Remote signaling signal acquisition system with function of false wiring protection alarm ) 是由 赵睿林 练炜 王奇峰 于 2019-11-20 设计创作，主要内容包括：本发明涉及一种具有误接线保护报警的遥信信号采集系统,该系统用于多路遥信信号的采集,该系统包括保护电路和信号处理电路,每一路遥信信号分别配置一路保护电路和信号处理电路,所述的保护电路输入端连接遥信信号输入端,保护电路的输出端通过信号处理电路连接电力终端设备的采集端口,该系统还包括一个接地共用报警电路,所述的保护电路的接地端通过接地共用报警电路接地,当保护电路输入端无遥信信号或遥信信号在允许范围时,接地共用报警电路被旁路,当保护电路输入端遥信信号超出允许范围时,接地共用报警电路导通报警。与现有技术相比,本发明集保护和报警为一体,当误接线时能第一时间进行保护并提醒现场工作人员,缩短故障排查时间。(The invention relates to a remote signaling signal acquisition system with a wrong wiring protection alarm, which is used for acquiring multi-path remote signaling signals and comprises a protection circuit and a signal processing circuit, wherein each path of remote signaling signal is respectively provided with a protection circuit and a signal processing circuit, the input end of the protection circuit is connected with the input end of the remote signaling signal, the output end of the protection circuit is connected with an acquisition port of power terminal equipment through the signal processing circuit, the system also comprises a grounding shared alarm circuit, the grounding end of the protection circuit is grounded through the grounding shared alarm circuit, when the input end of the protection circuit has no remote signaling signal or the remote signaling signal is in an allowable range, the grounding shared alarm circuit is bypassed, and when the remote signaling signal at the input end of the protection circuit exceeds the allowable range, the grounding shared alarm circuit is switched on for alarm. Compared with the prior art, the invention integrates protection and alarm, can protect and remind field workers in the first time when misconnection occurs, and shortens troubleshooting time.)

1. A remote signaling signal acquisition system with error wiring protection alarm is characterized in that the system is used for acquiring multi-path remote signaling signals and comprises a protection circuit (1) and a signal processing circuit (2), each path of remote signaling signal is respectively provided with the protection circuit (1) and the signal processing circuit (2), the input end of the protection circuit (1) is connected with the input end of the remote signaling signal, the output end of the protection circuit (1) is connected with an acquisition port of power terminal equipment through the signal processing circuit (2), the system also comprises a grounding common alarm circuit (3), the grounding end of the protection circuit (1) is grounded through the grounding common alarm circuit (3), when no remote signaling signal or the remote signaling signal is in an allowable range at the input end of the protection circuit (1), the grounding common alarm circuit (3) is bypassed, when the remote signaling signal at the input end of the protection circuit (1) exceeds the allowable range, the grounding shared alarm circuit (3) is conducted to alarm.

2. The remote signaling signal acquisition system with the function of false wiring protection alarm according to claim 1, wherein the circuit protection circuit (1) comprises a thermistor and a piezoresistor, a first terminal of the thermistor is connected with a remote signaling signal input end, a second terminal of the thermistor is an output end of the protection circuit (1), a first terminal of the piezoresistor is connected with a second terminal of the thermistor, and a second terminal of the piezoresistor is a grounding end of the protection circuit (1).

3. The remote signaling signal acquisition system with the function of false wire protection alarm according to claim 1, wherein the grounding common alarm circuit (3) comprises a grounding resistor, a first overvoltage protection transient diode and an alarm branch, the grounding end of the protection circuit (1) is grounded through the grounding resistor, and the first overvoltage protection transient diode and the alarm branch are respectively connected in parallel to the grounding resistor.

4. The remote signaling signal acquisition system with the function of protecting the false wiring according to claim 3, wherein the alarm branch comprises one or more of a sound alarm branch and a light alarm branch.

5. The remote signaling signal acquisition system with the function of protecting against misconnection according to claim 4, wherein the acoustic alarm branch comprises a diode and a buzzer, and the diode and the buzzer are connected in series.

6. The remote signaling signal acquisition system with the function of false wire protection alarm as claimed in claim 4, wherein the light alarm circuit comprises a diode and an indicator light, and the diode and the indicator light are connected in series.

7. The remote signaling signal acquisition system with the function of false wire protection alarm according to claim 1, wherein the signal processing circuit (2) comprises a first resistor, a second overvoltage protection transient diode, a second resistor and a filter, the first resistor, the second overvoltage protection transient diode and the second resistor are connected in series, the input end of the first resistor is connected to the output end of the protection circuit (1), the output end of the second resistor is connected to the acquisition port of the power terminal equipment, and the output end of the second resistor is grounded through the filter.

8. The remote signaling signal acquisition system with miswire protection alarm as claimed in claim 7, wherein said filtering unit comprises an RC filter.

Technical Field

The invention relates to a remote signaling signal acquisition system, in particular to a remote signaling signal acquisition system with function of wrong wiring protection and alarm.

Background

The intelligent terminal equipment is required to be used in a large amount in the construction process of the smart power grid, and the basic function of the intelligent terminal equipment is to collect on-site remote signaling and remote measuring information and control on-site switching equipment according to a certain strategy or a manual mode.

According to different application sites, remote signaling signals needing to be acquired also have different voltage grades, such as direct current 24V, 48V or 110V, and the like, and an internal circuit is designed according to different voltage grades, so that reliable acquisition of the remote signaling signals is guaranteed.

Because the intelligent terminal has more and complicated field application wiring, a plurality of power supplies with different voltage grades exist, and meanwhile, an alternating-current telemetering signal line exists, and the condition of mis-wiring caused by negligence of constructors frequently occurs in the field construction process. The remote communication line is connected by mistake, and particularly, a signal connected by mistake with a high voltage level enters a remote communication interface, so that the damage of a corresponding board card is often caused in the test process and the corresponding board card cannot be repaired.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a remote signaling signal acquisition system with a function of protecting and alarming by wrong wiring.

The purpose of the invention can be realized by the following technical scheme:

a remote signaling signal acquisition system with error wiring protection alarm is used for acquiring multi-path remote signaling signals and comprises a protection circuit and a signal processing circuit, wherein each path of remote signaling signal is respectively provided with a protection circuit and a signal processing circuit, the input end of the protection circuit is connected with the input end of the remote signaling signal, the output end of the protection circuit is connected with an acquisition port of power terminal equipment through the signal processing circuit, the system also comprises a grounding shared alarm circuit, the grounding end of the protection circuit is grounded through the grounding shared alarm circuit, when the input end of the protection circuit has no remote signaling signal or the remote signaling signal is in an allowed range, the grounding shared alarm circuit is bypassed, and when the remote signaling signal at the input end of the protection circuit exceeds the allowed range, the grounding shared alarm circuit is switched on for alarm.

The circuit protection circuit comprises a thermistor and a piezoresistor, wherein a first wiring end of the thermistor is connected with a remote signaling signal input end, a second wiring end of the thermistor is an output end of the protection circuit, the first wiring end of the piezoresistor is connected with a second wiring end of the thermistor, and the second wiring end of the piezoresistor is a grounding end of the protection circuit.

The grounding shared alarm circuit comprises a grounding resistor, a first overvoltage protection transient diode and an alarm branch circuit, wherein the grounding end of the protection circuit is grounded through the grounding resistor, and the first overvoltage protection transient diode and the alarm branch circuit are respectively connected to the grounding resistor in parallel.

The alarm branch comprises one or more of a sound alarm branch and a light alarm branch.

The sound alarm branch comprises a diode and a buzzer, wherein the diode and the buzzer are connected in series.

The light alarm circuit comprises a diode and an indicator light, wherein the diode and the indicator light are connected in series.

The signal processing circuit comprises a first resistor, a second overvoltage protection transient diode, a second resistor and a filter, wherein the first resistor, the second overvoltage protection transient diode and the second resistor are connected in series, the input end of the first resistor is connected to the output end of the protection circuit, the output end of the second resistor is connected with the acquisition port of the power terminal equipment, and the output end of the second resistor is grounded through the filter.

The filtering unit comprises an RC filter.

Compared with the prior art, the invention has the following advantages: the signal acquisition system is provided with a protection circuit and a signal processing circuit, wherein the protection circuit respectively performs voltage protection on each path of remote signaling signals, when the voltage of an input signal exceeds the rated voltage, the front end circuit and the rear end circuit are protected from physical damage, the signal processing circuit is used for acquiring and isolating the remote signaling signals, so that the remote signaling signals are effectively acquired, meanwhile, when the voltage of a certain path of input signal exceeds the rated voltage, the ground and the front end circuit share the alarm circuit to work for alarming, the system can simultaneously alarm while realizing protection, on one hand, the circuit board and devices of the electric terminal equipment for data acquisition cannot be damaged when the wiring of the remote signaling circuits is wrong, on the other hand, field personnel can be reminded at the first time, the wiring mistake is prevented from being ignored, the equipment is ensured to normally operate, and meanwhile, the time for troubleshooting is greatly shortened.

Drawings

Fig. 1 is a schematic circuit diagram of a remote signaling signal acquisition system with a miswiring protection alarm according to the present invention.

In the figure, 1 is a protection circuit, 2 is a signal processing circuit, and 3 is a ground common alarm circuit.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. Note that the following description of the embodiments is merely a substantial example, and the present invention is not intended to be limited to the application or the use thereof, and is not limited to the following embodiments.