CN202903936U - Singlechip-based electric leakage alarm - Google Patents
Singlechip-based electric leakage alarm Download PDFInfo
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- CN202903936U CN202903936U CN 201220428547 CN201220428547U CN202903936U CN 202903936 U CN202903936 U CN 202903936U CN 201220428547 CN201220428547 CN 201220428547 CN 201220428547 U CN201220428547 U CN 201220428547U CN 202903936 U CN202903936 U CN 202903936U
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Abstract
The utility model discloses a singlechip-based electric leakage alarm, comprising a zero sequence current transformer, a low pass filter circuit, a zero sequence active detection circuit, an A/D converter, a wireless communicator and an alarm circuit. A signal output terminal of the zero sequence current transformer is connected with a signal input terminal of the low pass filter circuit. A signal output terminal of the low pass filter circuit is connected with a signal input terminal of the zero sequence active detection circuit. A signal output terminal of the zero sequence active detection circuit is connected with a signal input terminal of the A/D converter. A signal output terminal of the A/D converter is connected with a signal input terminal of the singlechip. An alarm signal output terminal of the singlechip is connected with the alarm circuit. By arranging the singlechip and the wireless communicator in the electric leakage alarm, defects of data loss due to power failure and low fault processing rate in the traditional electric leakage alarm are prevented, on-line remote data transmission and alarm are realized, real-time analysis on each monitoring point is carried out, electric leakage is reduced, and personnel safety and property safety are ensured.
Description
Technical field
The utility model relates to a kind of leakage alarm, particularly relates to a kind of SCM Based leakage alarm.
Background technology
Since man invented and since making electricity consumption, electricity has not only brought a lot of convenience to the mankind, also can bring extinction to the mankind.It may burn out electrical equipment, causes fire, and the people is got an electric shock.Circuit leaks electricity when serious, can burn electrical equipment, and initiation fire causes serious consequence.This fire has more disguise than the fire that short circuit causes, usually silently occurs, and also is difficult to after catching fire find out real reason, people are neglectful in taking precautions, so harmfulness is larger.Therefore, need to earth leakage protective device be installed at circuit, whether testing circuit leaks electricity.When detecting the electric leakage situation, existing leakage alarm can only send warning, and does not have online data transmission and remote alarming function.
Summary of the invention
The purpose of this utility model is the SCM Based leakage alarm that a kind of simple in structure, online data transmission and remote alarms are provided in order to address the above problem.
The utility model is achieved through the following technical solutions:
A kind of SCM Based leakage alarm, comprise zero sequence current mutual inductor, low-pass filter circuit, the zero sequence testing circuit of gaining merit, A/D converter, wireless communication device and warning circuit, the signal output part of described zero sequence current mutual inductor is connected with the signal input part of described low-pass filter circuit, the signal output part of described low-pass filter circuit is connected with the signal input part of the meritorious testing circuit of described zero sequence, the signal output part of the meritorious testing circuit of described zero sequence is connected with the signal input part of described A/D converter, the signal output part of described A/D converter is connected with the signal input part of described single-chip microcomputer, and the alarm signal output ends of described single-chip microcomputer is connected with described warning circuit.
In circuit and the normal situation of electrical equipment, the vector of each phase current and equalling zero, therefore, the output of zero sequence current mutual inductor no signal, the vector of each phase current and non-vanishing when breaking down, fault current makes the zero sequence current mutual inductor output signal, after zero sequence current mutual inductor transfers to the signal that detects low-pass filter circuit and carries out filtering, export filtered signal to zero sequence meritorious testing circuit, after the meritorious testing circuit of zero sequence is processed, export signal to single-chip microcomputer, the Single-chip Controlling warning circuit gives the alarm, and carries out the online data transmission by wireless communication device and Surveillance center simultaneously.
Further, the meritorious testing circuit of described zero sequence comprises lagging circuit, the zero passage comparator circuit, controlling of sampling pulsing circuit and sampling holder, the input end of described lagging circuit is connected with the output terminal of described zero sequence current mutual inductor, the output terminal of described lagging circuit is connected with the input end of described zero passage comparator circuit, the output terminal of described zero passage comparator circuit is connected with the input end of described controlling of sampling pulsing circuit, the output terminal of described controlling of sampling pulsing circuit is connected with the input end of described sampling holder, and the output terminal of described sampling holder is connected with the input end of described A/D converter.
As preferably, described leakage alarm also comprises printer, and the signal input part of described printer is connected with the signal input part of described single-chip microcomputer.
As preferably, described leakage alarm also comprises and also comprises LED display, and the signal input part of described LED display is connected with the signal output part of described single-chip microcomputer.
The beneficial effects of the utility model are:
By single-chip microcomputer and wireless communication device are set in leakage alarm, avoided traditional shortcoming that leakage alarm data dead electricity is lost, the fault handling rate is low, online remote data transmission and warning have been realized, each monitoring point is analyzed in real time, reduced personal security and property safety that electric leakage brings.
Description of drawings
Fig. 1 is the structured flowchart of the SCM Based leakage alarm of the utility model.
Fig. 2 is the structured flowchart of the meritorious testing circuit of zero sequence in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments:
As shown in Figure 1, the SCM Based leakage alarm of the utility model, comprise zero sequence current mutual inductor, low-pass filter circuit, the zero sequence testing circuit of gaining merit, A/D converter, wireless communication device and warning circuit, the signal output part of described zero sequence current mutual inductor is connected with the signal input part of described low-pass filter circuit, the signal output part of described low-pass filter circuit is connected with the signal input part of the meritorious testing circuit of described zero sequence, the signal output part of the meritorious testing circuit of described zero sequence is connected with the signal input part of described A/D converter, the signal output part of described A/D converter is connected with the signal input part of described single-chip microcomputer, and the alarm signal output ends of described single-chip microcomputer is connected with described warning circuit.
In circuit and the normal situation of electrical equipment, the vector of each phase current and equalling zero, therefore, the output of zero sequence current mutual inductor no signal, the vector of each phase current and non-vanishing when breaking down, fault current makes the zero sequence current mutual inductor output signal, after zero sequence current mutual inductor transfers to the signal that detects low-pass filter circuit and carries out filtering, export filtered signal to zero sequence meritorious testing circuit, after the meritorious testing circuit of zero sequence is processed, export signal to single-chip microcomputer, the Single-chip Controlling warning circuit gives the alarm, and carries out the online data transmission by wireless communication device and Surveillance center simultaneously.
As shown in Figure 2, the meritorious testing circuit of described zero sequence comprises lagging circuit, the zero passage comparator circuit, controlling of sampling pulsing circuit and sampling holder, the input end of described lagging circuit is connected with the output terminal of described zero sequence current mutual inductor, the output terminal of described lagging circuit is connected with the input end of described zero passage comparator circuit, the output terminal of described zero passage comparator circuit is connected with the input end of described controlling of sampling pulsing circuit, the output terminal of described controlling of sampling pulsing circuit is connected with the input end of described sampling holder, and the output terminal of described sampling holder is connected with the input end of described A/D converter.
Described leakage alarm also comprises printer, and the signal input part of described printer is connected with the signal input part of described single-chip microcomputer.Described leakage alarm also comprises and also comprises LED display, and the signal input part of described LED display is connected with the signal output part of described single-chip microcomputer.
Claims (4)
1. SCM Based leakage alarm, it is characterized in that: comprise zero sequence current mutual inductor, low-pass filter circuit, the zero sequence testing circuit of gaining merit, A/D converter, wireless communication device and warning circuit, the signal output part of described zero sequence current mutual inductor is connected with the signal input part of described low-pass filter circuit, the signal output part of described low-pass filter circuit is connected with the signal input part of the meritorious testing circuit of described zero sequence, the signal output part of the meritorious testing circuit of described zero sequence is connected with the signal input part of described A/D converter, the signal output part of described A/D converter is connected with the signal input part of described single-chip microcomputer, and the alarm signal output ends of described single-chip microcomputer is connected with described warning circuit.
2. SCM Based leakage alarm according to claim 1, it is characterized in that: the meritorious testing circuit of described zero sequence comprises lagging circuit, the zero passage comparator circuit, controlling of sampling pulsing circuit and sampling holder, the input end of described lagging circuit is connected with the output terminal of described current transformer, the output terminal of described lagging circuit is connected with the input end of described zero passage comparator circuit, the output terminal of described zero passage comparator circuit is connected with the input end of described controlling of sampling pulsing circuit, the output terminal of described controlling of sampling pulsing circuit is connected with the input end of described sampling holder, and the output terminal of described sampling holder is connected with the input end of described A/D converter.
3. SCM Based leakage alarm according to claim 1, it is characterized in that: described leakage alarm also comprises printer, the signal input part of described printer is connected with the signal input part of described single-chip microcomputer.
4. SCM Based leakage alarm according to claim 1 is characterized in that: described leakage alarm also comprises and also comprises LED display, and the signal input part of described LED display is connected with the signal output part of described single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220428547 CN202903936U (en) | 2012-08-28 | 2012-08-28 | Singlechip-based electric leakage alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220428547 CN202903936U (en) | 2012-08-28 | 2012-08-28 | Singlechip-based electric leakage alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903936U true CN202903936U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220428547 Expired - Fee Related CN202903936U (en) | 2012-08-28 | 2012-08-28 | Singlechip-based electric leakage alarm |
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| CN (1) | CN202903936U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591700A (en) * | 2017-08-17 | 2018-01-16 | 芜湖市凯鑫避雷器有限责任公司 | A kind of safe boxing base for being common to high and low voltage electrical equipment |
-
2012
- 2012-08-28 CN CN 201220428547 patent/CN202903936U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591700A (en) * | 2017-08-17 | 2018-01-16 | 芜湖市凯鑫避雷器有限责任公司 | A kind of safe boxing base for being common to high and low voltage electrical equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20130828 |