A remote signal acquisition system with miswiring protection alarm

Abstract

The present invention relates to a remote signal acquisition system with miswiring protection alarm, the system is used for the acquisition of multiple remote signal signals, the system includes a protection circuit and a signal processing circuit, each remote signal is respectively configured with a protection circuit and a signal processing circuit, the input end of the protection circuit is connected to the input end of the remote signal, the output end of the protection circuit is connected to the acquisition port of the power terminal equipment through the signal processing circuit, the system also includes a grounding common alarm circuit, the grounding end of the protection circuit is grounded through the grounding common alarm circuit, when there is no remote signal at the input end of the protection circuit or the remote signal is within the allowable range, the grounding common alarm circuit is bypassed, when the remote signal at the input end of the protection circuit exceeds the allowable range, the grounding common alarm circuit is turned on and alarms. Compared with the prior art, the present invention integrates protection and alarm, can protect and remind on-site staff in the first time when miswiring occurs, and shortens the troubleshooting time.

Description

Technical Field

[0001] The invention relates to a remote signal acquisition system, in particular to a remote signal acquisition system with miswiring protection alarm. Background Art

[0002] A large number of intelligent terminal devices are needed in the construction of smart grids. The basic function of intelligent terminal devices is to collect on-site telesignaling and telemetry information, and control on-site switch equipment according to certain strategies or manual methods.

[0003] In the intelligent terminal, according to different application sites, the telemetering signals that need to be collected also have different voltage levels, such as DC 24V, 48V or 110V, etc. The internal circuit is designed for different voltage levels to ensure the reliable collection of telemetering signals.

[0004] Since the on-site application wiring of intelligent terminals is numerous and complex, there are multiple power supplies with different voltage levels, as well as AC telemetry signal lines. During on-site construction, construction workers often make mistakes in wiring due to negligence. Misconnection of telemetering lines, especially misconnection of high-voltage signals into telemetering interfaces, often causes irreparable damage to the corresponding boards during testing. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a remote signal acquisition system with miswiring protection alarm.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A remote signal acquisition system with miswiring protection alarm, the system is used for the acquisition of multiple remote signal signals, the system includes a protection circuit and a signal processing circuit, each remote signal is respectively configured with a protection circuit and a signal processing circuit, the input end of the protection circuit is connected to the remote signal input end, the output end of the protection circuit is connected to the acquisition port of the power terminal equipment through the signal processing circuit, the system also includes a grounding common alarm circuit, the ground end of the protection circuit is grounded through the grounding common alarm circuit, when there is no remote signal at the input end of the protection circuit or the remote signal is within the allowable range, the grounding common alarm circuit is bypassed, when the remote signal at the input end of the protection circuit exceeds the allowable range, the grounding common alarm circuit is turned on to alarm.

[0008] The circuit protection circuit comprises a thermistor and a varistor, wherein the first terminal of the thermistor is connected to the remote signal input terminal, the second terminal of the thermistor is the output terminal of the protection circuit, the first terminal of the varistor is connected to the second terminal of the thermistor, and the second terminal of the varistor is the ground terminal of the protection circuit.

[0009] The grounding common alarm circuit includes a grounding resistor, a first overvoltage protection transient diode and an alarm branch. The grounding end of the protection circuit 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.

[0010] The alarm branch includes a combination of one or more of a sound alarm branch and a light alarm branch.

[0011] The sound alarm branch includes a diode and a buzzer, and the diode and the buzzer are connected in series.

[0012] The light alarm circuit comprises a diode and an indicator light, and the diode and the indicator light are connected in series.

[0013] The signal processing circuit includes 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, the output end of the second resistor is connected to the collection port of the power terminal equipment, and the output end of the second resistor is also grounded through the filter.

[0014] The filtering unit includes an RC filter.

[0015] Compared with the prior art, the present invention has the following advantages: the signal acquisition system of the present invention is provided with a protection circuit and a signal processing circuit, the protection circuit performs voltage protection on each remote signal separately, when the input signal voltage exceeds the rated voltage, the front-end and rear-end lines are protected from physical damage, the signal processing circuit is used for acquiring and isolating the remote signal, thereby realizing effective acquisition of the remote signal, at the same time, when the wiring is wrong, the input signal voltage of a certain channel exceeds the rated voltage, and the grounding common alarm circuit works to alarm, the system can realize protection and alarm at the same time, on the one hand, it ensures that when the remote signal line wiring is wrong, the power terminal equipment circuit board and devices used for data acquisition will not be damaged, on the other hand, it can remind the on-site personnel at the first time to avoid the wiring error being ignored, ensure the normal operation of the equipment, and greatly shorten the time for troubleshooting errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a circuit diagram of a remote signal acquisition system with miswiring protection alarm.

[0017] In the figure, 1 is a protection circuit, 2 is a signal processing circuit, and 3 is a ground common alarm circuit. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the following embodiments are merely illustrative in nature, and the present invention is not intended to limit its applicable objects or uses, and the present invention is not limited to the following embodiments.

[0019] Example

[0020] like Figure 1 As shown, a remote signal acquisition system with miswiring protection alarm is used for acquiring multiple remote signal acquisition signals. The system includes a protection circuit 1 and a signal processing circuit 2. Each remote signal is respectively configured with a protection circuit 1 and a signal processing circuit 2. The input end of the protection circuit 1 is connected to the input end of the remote signal. The output end of the protection circuit 1 is connected to the acquisition port of the power terminal equipment through the signal processing circuit 2. The system also includes a grounding common alarm circuit 3. The grounding end of the protection circuit 1 is grounded through the grounding common alarm circuit 3. When there is no remote signal at the input end of the protection circuit 1 or the remote signal is within the allowable range, the grounding common alarm circuit 3 is bypassed. When the remote signal at the input end of the protection circuit 1 exceeds the allowable range, the grounding common alarm circuit 3 is turned on to alarm.

[0021] The protection circuit 1 includes a thermistor and a varistor. The first terminal of the thermistor is connected to the remote signal input terminal, the second terminal of the thermistor is the output terminal of the protection circuit 1, the first terminal of the varistor is connected to the second terminal of the thermistor, and the second terminal of the varistor is the ground terminal of the protection circuit 1. Taking the first remote signal as an example, Figure 1 The thermistor in the protection circuit 1 is PTC1 in the figure, and the varistor is VAR1 in the figure.

[0022] 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. The first overvoltage protection transient diode and the alarm branch are respectively connected in parallel to the grounding resistor. Figure 1 In the embodiment, the grounding resistor is Ra and the first overvoltage protection transient diode is TVSa.

[0023] The alarm branch includes a combination of one or more of a sound alarm branch and a light alarm branch. The sound alarm branch includes a diode and a buzzer, and the diode and the buzzer are connected in series. The light alarm circuit includes a diode and an indicator light, and the diode and the indicator light are connected in series. The alarm branch includes but is not limited to alarms such as sound and light. This embodiment provides an example of a sound alarm branch, which can be configured according to actual needs during actual use.

[0024] The signal processing circuit 2 includes 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, and the output end of the second resistor is connected to the collection port of the power terminal device. The output end of the second resistor is also grounded through the filter. The filtering unit includes an RC filter. Taking the first remote signal as an example, Figure 1 In the signal processing circuit 2, the first resistor is R1-1, the second overvoltage protection transient diode is TVS1, and the second resistor is R1-2.

[0025] The working principle of the remote signal acquisition system with miswiring protection alarm of the present invention is as follows: when there is no signal input at the input end of the protection circuit 1 or the input signal is within the allowable range, the protection circuit 1 connects the signal to the signal processing circuit 2 to perform normal signal acquisition, the grounding common alarm circuit 3 is bypassed, and the system does not generate an alarm signal. When the wiring is wrong, the input signal at the input end of the protection circuit 1 exceeds the allowable range, the protection circuit 1 starts to work, cuts off the signal input, and protects the back-end circuit; at the same time, the grounding common alarm circuit 3 generates an alarm signal output. Taking the sound alarm of this embodiment as an example, when the input signal at the input end of the protection circuit 1 exceeds the allowable range, the varistor in the protection circuit 1 is turned on, the sound alarm branch is turned on, the current can pass through the buzzer, and an alarm is generated. At the same time, the first overvoltage protection transient diode ensures that the buzzer will not burn out.

[0026] The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments can also be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the technical concept of the present invention.

Claims

1. A remote signal acquisition system with miswiring protection alarm, characterized in that: The system is used for collecting multiple telesignaling signals. The system comprises a protection circuit (1) and a signal processing circuit (2). Each telesignaling signal is respectively configured with a protection circuit (1) and a signal processing circuit (2). The input end of the protection circuit (1) is connected to the input end of the telesignaling signal. The output end of the protection circuit (1) is connected to the collection port of the 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 there is no telesignaling signal at the input end of the protection circuit (1) or the telesignaling signal is within an allowable range, the grounding common alarm circuit (3) is bypassed. When the telesignaling signal at the input end of the protection circuit (1) exceeds the allowable range, the grounding common alarm circuit (3) is turned on to alarm. The protection circuit (1) comprises a thermistor and a varistor, wherein a first terminal of the thermistor is connected to a remote signal input terminal, a second terminal of the thermistor is an output terminal of the protection circuit (1), a first terminal of the varistor is connected to a second terminal of the thermistor, and the second terminal of the varistor is a ground terminal of the protection circuit (1); 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; The signal processing circuit (2) 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 (1), the output end of the second resistor is connected to the collection port of the power terminal device, and the output end of the second resistor is also grounded through the filter.

2. A remote signal acquisition system with miswiring protection alarm according to claim 1, characterized in that: The alarm branch includes a combination of one or more of a sound alarm branch and a light alarm branch.

3. A remote signal acquisition system with miswiring protection alarm according to claim 2, characterized in that: The sound alarm branch includes a diode and a buzzer, and the diode and the buzzer are connected in series.

4. A remote signal acquisition system with miswiring protection alarm according to claim 2, characterized in that: The light alarm branch comprises a diode and an indicator light, and the diode and the indicator light are connected in series.

5. The remote signal acquisition system with miswiring protection alarm according to claim 1 is characterized in that: The filter comprises an RC filter.

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