CN101666842B - Common-ground warning indicator - Google Patents
Common-ground warning indicator Download PDFInfo
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- CN101666842B CN101666842B CN2008101960243A CN200810196024A CN101666842B CN 101666842 B CN101666842 B CN 101666842B CN 2008101960243 A CN2008101960243 A CN 2008101960243A CN 200810196024 A CN200810196024 A CN 200810196024A CN 101666842 B CN101666842 B CN 101666842B
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- ground
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- warning indicator
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Abstract
The invention provides a common-ground warning indicator, which is inserted in a ground wire of electric equipment so that the electric equipment is grounded. The common-ground warning indicator comprises a power supply unit and a ground terminal, wherein a common-ground complete circuit is connected between the power supply unit and the ground terminal, and the common-ground complete circuit comprises a common-ground interface and a warning unit; the common-ground interface is used for inserting the ground wire and comprises a first contact part and a second contact part; the first contact part is electrically connected with the power supply unit; the second contact part is electrically connected with the ground terminal; when the ground wire is inserted in the common-ground interface, the first contact part is electrically connected with the second contact part; and the warning unit is connected between the power supply unit and the ground terminal, and sends a warning signal when the ground wire is inserted in the common-ground interface. Thus, when the ground wire is inserted in the common-ground interface, the first contact part is electrically connected with the second contact part so that the electric equipment is effectively grounded.
Description
[technical field]
The present invention is a kind of common-ground warning indicator, particularly a kind of can be with the common-ground warning indicator of electric equipment effective grounding.
[background technology]
The introducing of grounding technology is the protective measure of taking in order to prevent equipment such as electric power or electronics to be struck by lightning at first, and purpose is that the thunder-strike current that thunder and lightning produces is incorporated into the earth by lightning rod, thereby plays the effect of protection buildings.Simultaneously; ground connection also is a kind of effective means of protection personal safety; when the phase line that certain reason causes (bad as wire insulation; aging circuit etc.) and device housings when touching; the shell of equipment will produce by dangerous voltage; the fault current of Sheng Chenging will be flowed through the PE line to the earth thus, thereby plays a protective role.With? the development of electronic communication and other digital field only considers that in earthed system lightning protection and safety can not meet the demands far away.Such as in communication system, the interconnection of signal requires each equipment all will have a benchmark ' ' signal with reference to ground between the large number quipments.And complicated along with electronic equipment, signal frequency is more and more higher, therefore, in the ground connection design, electromagnetic compatibility problem such as disturbing mutually and must give special concern between the signal, otherwise ground connection is improper will to have a strong impact on reliability of system operation and stability.Recently, also introduced in the signal technique of backflow of high speed signal " " notion.
In the attaching plug of existing electric equipment, what have is three pinned attaching plugs, and what have is two pinned attaching plugs.Wherein, it is grounding pin that a pin is arranged in the three pinned attaching plugs, under the normal condition, can reach the effect on common ground, but if the internal wiring bad (but outward appearance is no abnormal) of this grounding pin, the user can't learn the quality of grounding pin, then can't be with the electric equipment effective grounding.
In addition, if couple together use between the electric equipment with the electric equipment of tool two pinned attaching plugs and tool two pinned attaching plugs, because of there is not AC voltage difference altogether, can cause the damage of electric equipment between the two.
[summary of the invention]
The object of the invention be to provide a kind of can be with the common-ground warning indicator of electric equipment effective grounding.
For achieving the above object, the invention provides a kind of common-ground warning indicator, so that electric equipment ground connection, and described common-ground warning indicator comprises power supply unit in order to the ground wire that inserts electric equipment for it, described power supply unit is in order to provide voltage; Described common-ground warning indicator also comprises earth terminal, and described earth terminal is in order to electrically connect with the earth; And be connected with common ground path between described power supply unit and the described earth terminal, and described path altogether comprises common ground interface and caution unit, wherein, described interface altogether is in order to inserting ground wire, and described interface altogether comprises first contact site and second contact site, wherein, described first contact site and power supply unit electrically connect, and described second contact site and earth terminal electrically connect, and when being inserted with ground wire in interface altogether, electrically connect between first contact site and second contact site; Described caution unit is connected between power supply unit and the earth terminal, and when being inserted with ground wire in interface altogether, sends alarm signal.
Compared with prior art, when in interface altogether, being inserted with ground wire, electrically connect between first contact site and second contact site, can make the electric equipment effective grounding.
[description of drawings]
Fig. 1 is the circuit diagram of common-ground warning indicator of the present invention.
[embodiment]
Please refer to shown in Figure 1, common-ground warning indicator of the present invention in order to the ground wire that inserts electric equipment (figure does not show) so that electric equipment ground connection, often be reserved with ground terminal (figure does not show) on the electric equipment commonly used, ground terminal be connected on the common-ground warning indicator by ground wire (figure does not show).Described common-ground warning indicator comprises power supply unit 10, and described power supply unit 10 is in order to provide voltage; Described common-ground warning indicator also comprises earth terminal 20, and described earth terminal 20 is in order to electrically connect with the earth; And (quantity of path is not limit altogether to be connected with common ground path 30 between described power supply unit 10 and the described earth terminal 20, can be one or more, in present embodiment, be provided with four paths altogether altogether), and described path altogether 30 comprises common ground interface 31 and caution unit 32 (can be light emitting diode), wherein, described interface altogether 31 is in order to insert ground wire, and described interface altogether 31 comprises first contact site 311 and second contact site 312, wherein, described first contact site 311 electrically connects with power supply unit 10, and described second contact site 312 electrically connects with earth terminal 20, and when in interface 31 altogether, being inserted with ground wire, electric connection between first contact site 311 and second contact site 312, in addition, in order to obtain more stable common ground effect, can be in adding inductance 33 (having filter action) in the path 30 altogether, in present embodiment, one end of inductance 33 is connected to earth terminal 20, and the other end of inductance 33 is connected to second contact site 312.Described caution unit 32 is connected between power supply unit 10 and the earth terminal 20, and when being inserted with ground wire in interface 31 altogether, sends alarm signal.Wherein, being connected with of caution unit 32 is multiple, for example, can be connected between first contact site 311 and the power supply unit 10, also can be connected between second contact site 312 and the earth terminal 20.In present embodiment, the positive pole of described caution unit 32 is connected to power supply unit 10, and the negative pole of described caution unit 32 is connected to first contact site 311.In addition, described first contact site 311 electrically connects the grid of field effect transistor 40, and the source electrode of described field effect transistor 40 electrically connects power supply unit 10, and the drain electrode of described field effect transistor 40 electrically connects control end 50.And described first contact site 311 also electrically connects state-detection point 313 altogether, and described state-detection point altogether 313 is in order to electrically connect ground wire, to detect the ground state of electric equipment.
Described control end 50 connects the input end of code translator 60, and the output terminal of described code translator 60 electrically connects display 70, and described code translator 60 is deciphered processing according to the signal that receives, and the result after will deciphering exports described display 70 to, and shown by the insertion state of described display 70 according to described interface altogether.Described control end 50 also connects state of saturation display circuit 80, be provided with state of saturation pilot lamp 81 in the described state of saturation display circuit 80, and when interface 31 all is inserted with ground wire altogether, send the state of saturation indicator signal by described state of saturation display circuit 80 indication state of saturation pilot lamp 81 at all.Described control end 50 also connects the input end of unloaded indicating circuit 90, and the output terminal 91 of described unloaded indicating circuit 90 is connected to code translator 60; And when not inserting ground wire, the output terminal of described unloaded indicating circuit 90 91 output airborne signals, and described airborne signals exports described code translator 60 to, and be shown as zero by described display 70.
If when having one or more ground wires to insert altogether in the interface 31, the caution unit 32 in corresponding one or more paths altogether 30 can send alarm signal, to allow user's common ground state of understanding one or more electric equipments directly perceived.Display 70 also can be shown that different insertion states can show different numerals according to the insertion situation of interface 31 altogether, for example, when not having that interface 31 is inserted into altogether, is shown as zero.In addition, when all were inserted with ground wire in the interface 31 altogether, the user only need just can understand the common ground state of all electric equipments by state of saturation pilot lamp 81.
If the attaching plug of electric equipment has not been provided with grounding pin in (figure shows), and attaching plug is planted when intact, for detecting the ground state of electric equipment, then mode state-detection point 313 contacts together that ground wire is touched with point, if alarm signal is sent in the caution unit 32 of path 30 altogether in the place, the grounding pin that then shows attaching plug is normal, can relieved use electric equipment to remind the user; And do not send alarm signal in the caution unit 32 of path 30 altogether when the place, and show that then the grounding pin of attaching plug is undesired, fail to play the effect of ground connection, to remind the user electric equipment is done the processing of necessary ground connection.
Claims (9)
1. common-ground warning indicator, its in order to the ground wire that inserts electric equipment so that electric equipment ground connection is characterized in that described common-ground warning indicator comprises:
Power supply unit, it is in order to provide voltage;
Earth terminal, it is in order to electrically connect with the earth;
Path altogether, it is connected between power supply unit and the earth terminal, and described path altogether comprises:
Interface altogether, it is in order to insert ground wire, and described interface altogether comprises first contact site and second contact site, wherein, described first contact site and power supply unit electrically connect, and described second contact site and earth terminal electrically connect, and when being inserted with ground wire in interface altogether, electrically connect between first contact site and second contact site;
The caution unit, it is connected between first contact site and the power supply unit or is connected between second contact site and the earth terminal, and when being inserted with ground wire in interface altogether, sends alarm signal.
2. common-ground warning indicator according to claim 1 is characterized in that: described common-ground warning indicator is provided with several paths altogether.
3. common-ground warning indicator according to claim 2 is characterized in that: the positive pole of described caution unit is connected to power supply unit, and the negative pole of described caution unit is connected to first contact site.
4. common-ground warning indicator according to claim 3, it is characterized in that: described first contact site electrically connects the grid of field effect transistor, and the source electrode of described field effect transistor electrically connects power supply unit, and the drain electrode of described field effect transistor electrically connects control end.
5. common-ground warning indicator according to claim 4, it is characterized in that: described control end connects the input end of code translator, and the output terminal of described code translator electrically connects display, and described code translator is deciphered processing according to the signal that receives, and the result after will deciphering exports described display to, and shown by the insertion state of described display according to described interface altogether.
6. common-ground warning indicator according to claim 5, it is characterized in that: described control end also connects the state of saturation display circuit, be provided with the state of saturation pilot lamp in the described state of saturation display circuit, and when interface all is inserted with ground wire altogether, send the state of saturation indicator signal by described state of saturation display circuit indication state of saturation pilot lamp at all.
7. common-ground warning indicator according to claim 6, it is characterized in that: described control end also connects unloaded indicating circuit, and when not inserting ground wire, described unloaded indicating circuit output airborne signals, and described airborne signals exports described code translator to, and is shown as zero by described display.
8. common-ground warning indicator according to claim 1 is characterized in that: described caution unit is a light emitting diode.
9. common-ground warning indicator according to claim 1 is characterized in that: described first contact site also electrically connects common ground state-detection point, and described state-detection point altogether is in order to electrically connect ground wire, to detect the ground state of electric equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101960243A CN101666842B (en) | 2008-09-03 | 2008-09-03 | Common-ground warning indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101960243A CN101666842B (en) | 2008-09-03 | 2008-09-03 | Common-ground warning indicator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666842A CN101666842A (en) | 2010-03-10 |
| CN101666842B true CN101666842B (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101960243A Expired - Fee Related CN101666842B (en) | 2008-09-03 | 2008-09-03 | Common-ground warning indicator |
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| CN (1) | CN101666842B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2152317Y (en) * | 1993-06-17 | 1994-01-05 | 朱深山 | Three pole safety plug for circuit on-and-off test |
| CN2466818Y (en) * | 2000-09-30 | 2001-12-19 | 张华林 | Single-phase three-pin safety socket |
| CN2509588Y (en) * | 2001-10-11 | 2002-09-04 | 虞幸福 | Domestic power source socket wiring testing device |
| CN2569362Y (en) * | 2002-09-11 | 2003-08-27 | 华中科技大学 | Earthed concentrator |
| CN2824353Y (en) * | 2005-09-27 | 2006-10-04 | 孟加顷 | Ground self-checking plug |
-
2008
- 2008-09-03 CN CN2008101960243A patent/CN101666842B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2152317Y (en) * | 1993-06-17 | 1994-01-05 | 朱深山 | Three pole safety plug for circuit on-and-off test |
| CN2466818Y (en) * | 2000-09-30 | 2001-12-19 | 张华林 | Single-phase three-pin safety socket |
| CN2509588Y (en) * | 2001-10-11 | 2002-09-04 | 虞幸福 | Domestic power source socket wiring testing device |
| CN2569362Y (en) * | 2002-09-11 | 2003-08-27 | 华中科技大学 | Earthed concentrator |
| CN2824353Y (en) * | 2005-09-27 | 2006-10-04 | 孟加顷 | Ground self-checking plug |
Non-Patent Citations (3)
| Title |
|---|
| 刘利民，谢曼，李庆华.家庭用电的接地保护.《广东石油化工高等专科学校学报》.2000,第10卷(第4期), * |
| 祝恒志.电气设备的保护接地和保护接零.《咸宁学院学报》.2003,第23卷(第3期), * |
| 韩琦，何兵.共点接地技术在计算机网路系统防雷保护中的应用.《湖北气象》.2003, * |
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| Publication number | Publication date |
|---|---|
| CN101666842A (en) | 2010-03-10 |
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