CN201477166U - Automatic detection module for failure of working grounding cable - Google Patents
Automatic detection module for failure of working grounding cable Download PDFInfo
- Publication number
- CN201477166U CN201477166U CN200920191961XU CN200920191961U CN201477166U CN 201477166 U CN201477166 U CN 201477166U CN 200920191961X U CN200920191961X U CN 200920191961XU CN 200920191961 U CN200920191961 U CN 200920191961U CN 201477166 U CN201477166 U CN 201477166U
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- circuit
- detection module
- sample
- automatic detection
- grounding cable
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Abstract
The utility model provides an automatic detection module with stable and reliable operation for the failure of a working grounding cable. The module can not only be independently encapsulated inside a casing to serve as a detection device but also serve as a partial functional circuit to be integrated with other instruments for use. The automatic detection module comprises a first sampling circuit used for sampling power supply ground cable signals, a second sampling circuit used for sampling construction ground cable signals, a third sampling circuit used for sampling working grounding cable signals, an arithmetic circuit used for executing comparison operation to the signals from the first, the second and the third sampling circuits, an alarming element connected with the output terminal of the arithmetic circuit, and a power supply circuit used for supplying power for the arithmetic circuit. The automatic detection module provided by the utility model has strong anti-interference capacity and stable work, and can accurately detect the abnormality of the working grounding cable and give an alarm.
Description
Technical field
The utility model relates to the electronic device manufacturing technology field, relates in particular to a kind of electron device that is used for the testing earthed circuit that has.
Background technology
Whether existing market does not have a product to lose efficacy by the testing ground wire.The quality of working grounding cable influences the quality of construction quality, equipment performance.The good operation ground wire can suppress the influence of external electromagnetic interference, can prevent that again electronic electric equipment is to outside launching electromagnetic wave; And the ground connection of losing efficacy usually can be introduced very serious disturbance, even can make the electronic electric equipment can't operate as normal.When equipment made moist, electrostatic interference will occur, and electrostatic interference may be destroyed sensor and sensing assembly, causes device shutdown, showed chaotic.Therefore, the metal shell of electrical equipment, chassis, support all should connect into equipotential with working grounding cable.The good operation ground wire provides the path of releasing over the ground to electrostatic charge, in case produce electric spark or electric arc.There is very big hidden danger in the working grounding cable that lost efficacy to the person and equipment.
Summary of the invention
The utility model provides a kind of stable and reliable operation working grounding cable automatic detection module that lost efficacy, this module both can individual packages in housing as detection means, also can be used as the partial function circuit and other instruments integrate use.
A kind of working grounding cable automatic detection module that lost efficacy comprises:
First sample circuit of power ground signal is used to sample;
Second sample circuit of building ground signal is used to sample;
The 3rd sample circuit that is used for the sampling work ground signal;
The signal of first sample circuit, second sample circuit and the 3rd sample circuit is compared the computing circuit of computing;
The alarm element that links to each other with the computing circuit output terminal;
Be used for power circuit to the computing circuit power supply.
Described power ground: after transformer neutral point ground connection, draw backbone
Described building ground wire: this suffers building to attack thunderbolt directly as preventing, the earthed system of setting adopts buildings main reinforcement association usually, or pile is beaten on the buildings next door.
Described working grounding cable: circuit operate as normal and a reference potential providing.This reference potential generally is set at zero.This reference potential can be made as in the Circuits System certain a bit, a certain section etc.When this reference potential is not connected with the earth, be considered as relative zero potential.But this relative zero potential is unsettled, and it can change along with the variation of external electromagnetic field, the parameter of system is changed, thereby cause the Circuits System job insecurity.When this reference potential was connected with the earth, reference potential was considered as the zero potential of the earth, and can not change along with the variation of external electromagnetic field.
Described computing circuit can be all kinds of signal circuit or the single-chip microcomputers relatively that carry out in the prior art.
As preferably, be provided with first holding circuit between first sample circuit and the computing circuit.
As preferably, be provided with second holding circuit between second sample circuit and the computing circuit.
As preferably, be provided with the 3rd holding circuit between the 3rd sample circuit and the computing circuit.
Also first holding circuit, second holding circuit and the 3rd holding circuit can be set simultaneously.
About the setting of holding circuit, be example with first sample circuit,
When excessive or ground wire had superpotential to scurry into when stake resistance, the first sample circuit voltage was raised rapidly, and superpotential or high-voltage pulse damage the computing circuit element easily, cause the product cisco unity malfunction.Before sample circuit voltage flows into computing circuit, first holding circuit of forming by relay, trigger circuit and controllable silicon of series connection on the circuit.When circuit had superpotential or high-voltage pulse, trigger circuit were given pulse of controllable silicon, and the controllable silicon conducting is powered to relay then, and sample circuit is cut off in the actuating of relay, the protection computing circuit, and detection module shows stake resistance inefficacy warning simultaneously.
Described power circuit comprises:
The 4th holding circuit that is connected with civil power live wire, zero line;
The reduction voltage circuit that links to each other with the 4th holding circuit;
The current converter circuit that links to each other with reduction voltage circuit;
Wherein the output terminal of current converter circuit is powered to described computing circuit.
When in the building earth wire failure automatic detection module during certain line short; on L, N circuit, can produce a very big short-circuit current; for the purpose of line security; the 4th holding circuit that is installed in series on L, N circuit (being time-delay fuse) is protected circuit, can avoid unnecessary loss to take place.
Described alarm element comprises first alarm element that is used to point out the power ground abnormal signal, the 3rd alarm element that is used to point out the second unusual alarm element of building ground signal and is used to point out the working grounding cable abnormal signal.
Described alarm element is at least a in loudspeaker, the light emitting diode, also can be other sound, optical element or circuit, as preferably, between computing circuit and alarm element, be provided with amplifying circuit, can be a triode, the computing circuit output terminal inserts transistor base, transistor collector element input end taking alarm, transistor emitter ground connection.
The alarm element output terminal inserts the live wire between current converter circuit and the computing circuit, the zero line ground connection between current converter circuit and the computing circuit.
Civil power of the present utility model refers to 220V or 380V alternating current, and L represents live wire, and N represents zero line.
The utility model working grounding cable automatic detection module antijamming capability that lost efficacy is strong, and working stability can detect the unusual of working grounding cable accurately and reports to the police.
Description of drawings
Fig. 1 is the lost efficacy structural representation of automatic detection module of the utility model working grounding cable.
Embodiment
Referring to Fig. 1, the utility model working grounding cable automatic detection module that lost efficacy comprises:
First sample circuit of power ground signal is used to sample;
Second sample circuit of building ground signal is used to sample;
The 3rd sample circuit that is used for the sampling work ground signal;
The signal of first sample circuit, second sample circuit and the 3rd sample circuit is compared the computing circuit of computing;
The alarm element that links to each other with the computing circuit output terminal;
Be used for power circuit to the computing circuit power supply.
Be provided with first holding circuit between first sample circuit and the computing circuit, be provided with second holding circuit between second sample circuit and the computing circuit, be provided with the 3rd holding circuit between the 3rd sample circuit and the computing circuit.
Power circuit comprises:
The 4th holding circuit that is connected with civil power live wire, zero line;
The reduction voltage circuit that links to each other with the 4th holding circuit;
The current converter circuit that links to each other with reduction voltage circuit;
Wherein the output terminal of current converter circuit is powered to described computing circuit.
Alarm element by parallel first alarm element that is used to point out the power ground abnormal signal, the 3rd alarm element that is used to point out the second unusual alarm element of building ground signal and is used to point out the working grounding cable abnormal signal.
Visible first alarm element is made up of triode 3, loudspeaker 2 and light emitting diode 1 among Fig. 1, the computing circuit output terminal inserts triode 3 base stages, triode 3 grounded emitters, an end of loudspeaker 2 and light emitting diode 1 triode 3 collectors that insert in parallel, the other end power circuit that inserts in parallel.
Visible second alarm element is made up of triode 6, loudspeaker 5 and light emitting diode 4 among Fig. 1, the computing circuit output terminal inserts triode 6 base stages, triode 6 grounded emitters, an end of loudspeaker 5 and light emitting diode 4 triode 6 collectors that insert in parallel, the other end power circuit that inserts in parallel.
Visible the 3rd alarm element is made up of triode 9, loudspeaker 8 and light emitting diode 7 among Fig. 1, the computing circuit output terminal inserts triode 9 base stages, triode 9 grounded emitters, an end of loudspeaker 8 and light emitting diode 7 triode 9 collectors that insert in parallel, the other end power circuit that inserts in parallel.
When the utility model working grounding cable lost efficacy the work of automatic detection module:
Civil power enters current converter circuit after through the 4th holding circuit, reduction voltage circuit, after current converter circuit changes direct current with alternating current, inserts computing circuit and powers to entire circuit.
First power ground is taken a sample; through after first holding circuit sampled signal being sent to computing circuit; the canonical parameter contrast that computing circuit carries out computing to sampled signal and sets; judge whether the building ground wire meets the requirements; undesirable; light emitting diode 1 luminous indication, and report to the police with loudspeaker 2 buzzers.
In like manner; second sample circuit is taken a sample to the building ground wire; through after second holding circuit sampled signal being sent to computing circuit; the canonical parameter contrast that computing circuit carries out computing to sampled signal and sets; judge whether the building ground wire meets the requirements; undesirable, light emitting diode 4 luminous indications, and report to the police with loudspeaker 5 buzzers.
The 3rd sample circuit is taken a sample to working grounding cable; through after the 3rd holding circuit sampled signal being sent to computing circuit; the canonical parameter contrast that computing circuit carries out computing to sampled signal and sets; judge whether the building ground wire meets the requirements; undesirable; light emitting diode 7 luminous indications, and report to the police with loudspeaker 8 buzzers.
Claims (6)
1. a working grounding cable automatic detection module that lost efficacy is characterized in that, comprising:
First sample circuit of power ground signal is used to sample;
Second sample circuit of building ground signal is used to sample;
The 3rd sample circuit that is used for the sampling work ground signal;
The signal of first sample circuit, second sample circuit and the 3rd sample circuit is compared the computing circuit of computing;
The alarm element that links to each other with the computing circuit output terminal;
Be used for power circuit to the computing circuit power supply.
2. the working grounding cable as claimed in claim 1 automatic detection module that lost efficacy is characterized in that, is provided with first holding circuit between described first sample circuit and the computing circuit.
3. the working grounding cable as claimed in claim 2 automatic detection module that lost efficacy is characterized in that, is provided with second holding circuit between described second sample circuit and the computing circuit.
4. as each described working grounding cable of claim 1～3 automatic detection module that lost efficacy, it is characterized in that, be provided with the 3rd holding circuit between described the 3rd sample circuit and the computing circuit.
5. the working grounding cable as claimed in claim 1 automatic detection module that lost efficacy is characterized in that described power circuit comprises:
The 4th holding circuit that is connected with civil power live wire, zero line;
The reduction voltage circuit that links to each other with the 4th holding circuit;
The current converter circuit that links to each other with reduction voltage circuit;
Wherein the output terminal of current converter circuit is powered to described computing circuit.
6. the working grounding cable as claimed in claim 1 automatic detection module that lost efficacy, it is characterized in that described alarm element comprises first alarm element that is used to point out the power ground abnormal signal, the 3rd alarm element that is used to point out the second unusual alarm element of building ground signal and is used to point out the working grounding cable abnormal signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920191961XU CN201477166U (en) | 2009-08-20 | 2009-08-20 | Automatic detection module for failure of working grounding cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920191961XU CN201477166U (en) | 2009-08-20 | 2009-08-20 | Automatic detection module for failure of working grounding cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201477166U true CN201477166U (en) | 2010-05-19 |
Family
ID=42413419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920191961XU Expired - Fee Related CN201477166U (en) | 2009-08-20 | 2009-08-20 | Automatic detection module for failure of working grounding cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201477166U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288851A (en) * | 2010-06-17 | 2011-12-21 | 中兴通讯股份有限公司 | Device for detecting connection between working ground and protected ground |
| CN103837788A (en) * | 2012-11-22 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Alarm circuit |
| CN104898015A (en) * | 2015-06-27 | 2015-09-09 | 佛山市顺德万和电气配件有限公司 | Alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit |
| CN108535592A (en) * | 2017-03-03 | 2018-09-14 | 徐志军 | Power equipment smart grounding line |
| CN114545170A (en) * | 2018-07-13 | 2022-05-27 | 通用电气航空系统有限公司 | Power distribution system |
-
2009
- 2009-08-20 CN CN200920191961XU patent/CN201477166U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288851A (en) * | 2010-06-17 | 2011-12-21 | 中兴通讯股份有限公司 | Device for detecting connection between working ground and protected ground |
| CN103837788A (en) * | 2012-11-22 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Alarm circuit |
| CN104898015A (en) * | 2015-06-27 | 2015-09-09 | 佛山市顺德万和电气配件有限公司 | Alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit |
| CN108535592A (en) * | 2017-03-03 | 2018-09-14 | 徐志军 | Power equipment smart grounding line |
| CN114545170A (en) * | 2018-07-13 | 2022-05-27 | 通用电气航空系统有限公司 | Power distribution system |
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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: 20100519 Termination date: 20120820 |