CN207051411U - A kind of ground line detection circuit and ground line testing device - Google Patents
A kind of ground line detection circuit and ground line testing device Download PDFInfo
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- CN207051411U CN207051411U CN201720294279.8U CN201720294279U CN207051411U CN 207051411 U CN207051411 U CN 207051411U CN 201720294279 U CN201720294279 U CN 201720294279U CN 207051411 U CN207051411 U CN 207051411U
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Abstract
Circuit test field is the utility model is related to, more particularly to a kind of ground line detection circuit and ground line testing device.Wherein, the ground line detection circuit includes switch module, the first partial pressure unit, Tip element and the second partial pressure unit.The input connection live wire of first partial pressure unit, the output end of first partial pressure unit and the input of Tip element connect, the output end of Tip element and the input of switch module connect, the control terminal of switch module is connected with the output end of the second partial pressure unit, the output end connection zero line of switch module, the input connection ground wire of the second partial pressure unit.Ground wire detection circuit structure is simple, circuit cost is low and can produce cue in time to prompt testing staff.
Description
Technical field
Circuit test field is the utility model is related to, more particularly to a kind of ground line detection circuit and ground line testing device.
Background technology
With expanding economy, the species of household electrical appliance is increasingly various, especially the household electrical appliance with 3-phase plug.So
And the household electrical appliance of 3-phase plug typically still are able to be continuing with the case where losing effective grounding, such a situation is general difficult
With judge the household electrical appliance whether effective grounding, cause potential safety hazard.
Prior art is during ground wire is detected, typically using universal meter respectively between live wire, zero line and ground wire
Detected.
Inventor has found that existing correlation technique at least has problems with during the present invention is realized：Existing ground wire
Detection means is by the impedance value shown by universal meter to examine geodesic contact condition, however, being operated in some ground wires
During, because existing grounding wire detection device lacks prompting function, and complex operation, due to debugging and connecing using universal meter
Line and observation universal meter need more time, therefore test man is likely to be exposed at the state of electric leakage for a long time, lack peace
Entirely.
Utility model content
One purpose of the utility model embodiment aims to provide a kind of ground line detection circuit and ground line testing device, energy
Enough solves the technical problem that existing grounding wire detection device is complicated, security is low.
In order to solve the above technical problems, the technical scheme that the utility model uses is：A kind of ground wire detection electricity is provided
Road, described ground line detection circuit include switch module, the first partial pressure unit, Tip element and the second partial pressure unit；
The input connection live wire of first partial pressure unit, the output end of first partial pressure unit and the prompting are single
The input connection of member, the output end of the Tip element are connected with the input of the switch module,
The control terminal of the switch module is connected with the output end of second partial pressure unit, the output of the switch module
End connection zero line, the input connection ground wire of second partial pressure unit.
Alternatively, described ground line detection circuit also includes protection location, and the protection location is series at the live wire and institute
Between stating the first partial pressure unit, the input of protection location connection live wire, the output end of the protection location and described the
The input connection of one partial pressure unit.
Alternatively, the Tip element is LED, and the anode of the LED is the input of the Tip element, described
The negative electrode of LED is the output end of the Tip element；
Or
The Tip element is buzzer, and the anode of the buzzer is the input of the Tip element, the buzzing
The negative electrode of device is the output end of the Tip element；
Alternatively, the switch module is NPN type triode, and the base stage of the NPN type triode is the switch module
Control terminal, the input of the extremely described switch module of current collection of the NPN type triode, the transmitting of the NPN type triode
The output end of extremely described switch module；
The protection location is diode, the input of the just extremely described protection location of the diode, two pole
The negative pole of pipe is the output end of the protection location；
First partial pressure unit is first resistor, and one end of the first resistor is the input of first partial pressure unit
End, the other end of the first resistor are the output end of first partial pressure unit；
Second partial pressure unit is second resistance, and one end of the second resistance is the input of second partial pressure unit
End, the other end of the second resistance are the output end of second partial pressure unit.
In order to solve the above technical problems, another technical scheme that the utility model uses is：A kind of ground wire detection is provided
Circuit, described ground line detection circuit include switch module, the first partial pressure unit, Tip element and the second partial pressure unit；
The input connection live wire of first partial pressure unit,
Input of the output end of first partial pressure unit respectively with the Tip element and the switch module is connected,
The output end of the Tip element and the switch module is all connected with zero line, the control terminal of the switch module with described second point
The output end connection of unit is pressed,
The input connection ground wire of second partial pressure unit.
Alternatively, described ground line detection circuit also includes protection location, and the protection location is series at the live wire and institute
Between stating the first partial pressure unit, the input of protection location connection live wire, the output end of the protection location and described the
The input connection of one partial pressure unit.
Alternatively, the Tip element is LED, and the anode of the LED is the input of the protection location, described
The negative electrode of LED is the output end of the protection location；
Alternatively, the Tip element is buzzer, and the anode of the buzzer is the input of the Tip element, institute
The negative electrode for stating buzzer is the output end of the Tip element；
Alternatively, the switch module is NPN type triode, and the base stage of the NPN type triode is the switch module
Control terminal, the input of the extremely described switch module of current collection of the NPN type triode, the transmitting of the NPN type triode
The output end of extremely described switch module；
The protection location is diode, the input of the just extremely described protection location of the diode, two pole
The negative pole of pipe is the output end of the protection location；
First partial pressure unit is first resistor, and one end of the first resistor is the input of first partial pressure unit
End, the other end of the first resistor are the output end of first partial pressure unit；
Second partial pressure unit is second resistance, and one end of the second resistance is the input of second partial pressure unit
End, the other end of the second resistance are the output end of second partial pressure unit.
In order to solve the above technical problems, another technical scheme that the utility model uses is：A kind of ground wire test is provided
Equipment, described ground line testing device include above-mentioned ground line detection circuit.
The beneficial effect of the utility model embodiment is：The situation of prior art is different from, is set in detection external electrical
During standby ground contact state, when the ground contact of external electrical equipment is good, pass through the first partial pressure unit and the second partial pressure
The partial pressure effect of unit, switch module enter conducting state, and Tip element produces cue, and testing staff just knows external electrical
The ground contact of gas equipment is good.Conversely, when Tip element has not been able to produce cue, testing staff just knows external electrical
The ground wire of equipment not yet installs.Circuit structure is simple, circuit cost is low for the ground wire detection that the utility model embodiment provides
And cue can be produced in time to prompt testing staff.
Brief description of the drawings
Fig. 1 is the theory diagram for a kind of ground line detection circuit that the utility model embodiment one provides；
Fig. 2 is the structural representation for a kind of ground line detection circuit that the utility model embodiment one provides；
Fig. 3 is the theory diagram for a kind of ground line detection circuit that another embodiment of the utility model provides；
Fig. 4 is the structural representation for a kind of ground line detection circuit that another embodiment of the utility model provides.
Embodiment
For the ease of understanding the utility model, with reference to the accompanying drawings and detailed description, the utility model is carried out more
Detailed description.It should be noted that when element is expressed " being fixed on " another element, it can be directly in another element
Above or therebetween there may be one or more elements placed in the middle.When an element is expressed " connection " another element, it can
To be directly to another element or there may be one or more elements placed in the middle therebetween.This specification is used
Term " vertical ", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, technology all used in this specification and scientific terminology are with belonging to skill of the present utility model
The implication that the technical staff in art field is generally understood that is identical.In art used in the description of the present utility model in this specification
Language is intended merely to describe the purpose of specific embodiment, is not intended to limit the utility model.Art used in this specification
Language "and/or" includes the arbitrary and all combination of one or more related Listed Items.
Referring to Fig. 1, Fig. 1 is the theory diagram for a kind of ground line detection circuit that the utility model embodiment one provides.Such as
Shown in Fig. 1, the ground line detection circuit 100 includes the first partial pressure unit 11, Tip element 12, the partial pressure list of switch module 13 and second
Member 14；Wherein, the input 111 of the first partial pressure unit 11 connects live wire, the output end 112 and Tip element of the first partial pressure unit
12 input 121 is connected, and the output end 122 of Tip element 12 is connected with the input 131 of switch module 13, switch module 13
Output end 132 connect zero line, the control terminal 133 of switch module 13 is connected with the output end 142 of the second partial pressure unit 14, second
The input 141 of partial pressure unit 14 connects ground wire.
When testing staff detects electrical equipment using ground line detection circuit 100, by electric FireWire port port to be detected, ground wire
The connection corresponding with the ground line detection circuit of port and zero line port.If the ground contact of electrical equipment is good, electrical equipment is in itself
As a potential body, it applies voltage in the second partial pressure unit 14, and the voltage puts on the control terminal of switch module 13
133, it is in and leads so as to promotes switch module 13 under the effect between the first partial pressure unit 11 and the second partial pressure unit 14
Logical state, the i.e. input 131 of switch module 13 and output end 132 are in conducting state, and electric current flows into first point from live wire
Unit 11 and Tip element 12 are pressed, Tip element 12 produces cue, prompts the ground wire grounded good of electrical equipment.
When the ground contact of electrical equipment is bad, because the both ends of the second partial pressure unit 14 do not have voltage, that is,：Switch
The control terminal 133 of component 13 is off switch module 13 due to the application of no voltage, i.e. switch module 13
Input 131 and output end 132 are in off-state, and Tip element 12 is in breaking due to input 131 and output end 132
Open state, no electric current flow through and have not been able to produce cue, and testing staff has not been able to produce prompting according to Tip element 12
Signal and know that the ground contact of electrical equipment is bad.
The utility model embodiment provide ground wire detection circuit structure it is simple, circuit cost is low and can produce in time
Cue is to prompt whether testing staff's electrical equipment is grounded well.Certainly, in other alternate embodiments, can also incite somebody to action
Ground line detection circuit is built in the part for turning into electrical equipment in electrical equipment, and make ground line detection circuit respectively with electrically
Live wire, zero line and the ground wire of equipment are corresponding to be connected, and when the generation cue of Tip element 12, then illustrates electrical equipment grounding not
It is good, when Tip element 12 does not produce cue, then illustrate that electrical equipment grounding is good.
In some embodiments, as shown in Fig. 2 the first partial pressure unit 11 can be first resistor R1, first resistor R1
One end be the first partial pressure unit 11 input 111, the first resistor R1 other end is the output end of the first partial pressure unit 11
112.Second partial pressure unit 14 is second resistance R2, and second resistance R2 one end is the input 141 of the second partial pressure unit 14, the
The two resistance R2 other end is the output end 142 of the second partial pressure unit 14.Wherein, first resistor R1 and second resistance R2 rise
To the effect of decompression, certainly, in other alternate embodiments, the first partial pressure unit 11 and the second partial pressure unit 14 can also be
The combination in parallel or series of multiple resistance.
Tip element 12 can be LED as shown in Figure 2, wherein, the anode of LED is the input of Tip element 11
End, the negative electrode of LED are the output end of Tip element 11, when the ground contact of electrical equipment is good, pass through lighting for LED
State, it can visually judge that the ground contact of electrical equipment is good.In other alternate embodiments, Tip element 12 may be used also
Think buzzer M1, buzzer M1 anode is the input of Tip element 12, and buzzer M1 negative electrode is Tip element 12
Output end, buzzer M1 can be from the ground wire grounded situations of ground wire for acoustically prompting testing staff's electric equipment.
Switch module 13 is can be NPN type triode as shown in Figure 2, and wherein the base stage of NPN type triode is switch
The control terminal 133 of component 13, the input 131 of the current collection extremely switch module 13 of NPN type triode, the hair of NPN type triode
Emitter-base bandgap grading is the output end 132 of switch module 13.
When testing staff detects electrical equipment using ground line detection circuit 100, by electric FireWire port port to be detected, ground wire
The connection corresponding with the ground line detection circuit of port and zero line port.If the ground contact of electrical equipment is good, electrical equipment is in itself
As a potential body, it applies voltage in second resistance R2, and the voltage puts on the base stage of NPN type triode, so as to
Promote NPN type triode in the conduction state under the effect between first resistor R1 and second resistance R2, i.e. NPN type three
The collector and emitter of pole pipe is in conducting state, and electric current flows into resistance R1 and LED from live wire, and LED is bright, detects people
Member visually directly judges the ground wire grounded good of electrical equipment.
When the ground contact of electrical equipment is bad, because second resistance R2 both ends do not have voltage, that is,：NPN type three
The base stage of pole pipe is off NPN type triode due to the application of no voltage.That is the colelctor electrode of NPN type triode
Do not turned on emitter stage, no electric current flows through LED, and LED is in OFF state, and testing staff visually can directly sentence
Disconnected electrical equipment it is ground wire grounded bad.
During ground terminal security is detected, testing staff is once in a while by electric FireWire port port and zero line to be detected
Port and the polarity connection of the ground line detection circuit return, i.e. by the first partial pressure of electric FireWire port port to be detected and detection circuit
The input of unit 11 is connected with zero line, by electric zero line port to be detected and the output of the switch module 13 of detection circuit
, easily there is security incident in end.Therefore, in some embodiments, ground line detection circuit 100 also includes protection location 17, protects
Shield unit 17 is series between live wire and the first partial pressure unit 11, and protection location 17 can be diode D1 as shown in Figure 2, and two
The pole pipe D1 just extremely input 171 of protection location 17, diode D1 negative pole are the output end 172 of protection location 17, two
Pole pipe D1 can block the high-tension current that live wire is brought, so that effectively protecting field line detection circuit.
Certainly, the connected mode of element is not limited to the mode described by above-mentioned embodiment in ground line detection circuit.Such as Fig. 3
Shown, the ground line detection circuit 300 includes the first partial pressure unit 31, Tip element 32, switch module 33, the second partial pressure unit 34
With protection location 35.The input 311 of first partial pressure unit 31 connects live wire, and the output end 512 of the first partial pressure unit 31 is distinguished
It is connected with the input 331 of Tip element 32 and switch module 33, the output end 332 of Tip element 32 and switch module 33 connects
Connecting to neutral line, the control terminal 333 of switch module 33 are connected with the output end 342 of the second partial pressure unit 34, the second partial pressure unit 34
Input 341 connects ground wire 3, and protection location 37 is series between the partial pressure unit 31 of live wire 3 and first, the input of protection location 37
The connection of end 371 live wire, the output end 372 of protection location 37 are connected with the input 311 of the first partial pressure unit 51, wherein, protection
The effect acted in above-mentioned embodiment of unit 37 in the present embodiment is identical, is repeated no more secondary.
When testing staff detects electrical equipment using ground line detection circuit 300, by electric FireWire port port to be detected, ground wire
The connection corresponding with the ground line detection circuit of port and zero line port.If the ground contact of electrical equipment is good, electrical equipment is in itself
As a potential body, it applies voltage in the second partial pressure unit 34, and the voltage puts on the control terminal of switch module 33
533, it is in and leads so as to promotes switch module 33 under the effect between the first partial pressure unit 31 and the second partial pressure unit 34
Logical state, electric current flow into the first partial pressure unit 31 and switch module 33 from live wire, carry out short circuit so as to will be prompted to unit 32, make to carry
Show that unit 32 has not been able to produce prompt action, testing staff has not been able to generation cue according to Tip element 32 and known electrically
The ground contact of equipment is good.
When the ground contact of electrical equipment is bad, because the both ends of the second partial pressure unit 34 do not have voltage, that is,：Switch
The control terminal 333 of component 33 is off switch module 53 due to the application of no voltage.Further, prompting is single
Member 32 can produce cue because electric current flows through, and testing staff can produce cue according to Tip element 32 and know
The ground contact of road electrical equipment is bad.
The utility model embodiment provide ground wire detection circuit structure it is simple, circuit cost is low and can produce in time
Cue is given birth to prompt testing staff.
In some embodiments, Tip element 32 can be buzzer as shown in Figure 4, and the anode of buzzer is prompting
The input 321 of unit 32, the negative electrode of buzzer are connected with zero line.In other embodiments, Tip element 32 can also be
LED, the anode of LED are the input 371 of protection location 37, and the negative electrode of LED is the output end 372 of protection location 37.
Switch module 33 can be NPN type triode as shown in Figure 4, and the base stage of NPN type triode is switch module 33
Control terminal 533, the input 331 of the current collection extremely switch module 33 of NPN type triode, the transmitting of NPN type triode is extremely
The output end 332 of switch module 33.
Protection location 37 can be diode as shown in Figure 4, the just extremely input of protection location 37 of diode
371, the negative pole of diode is the output end 372 of protection location 37.First partial pressure unit 31 is first resistor, the one of first resistor
It is the output end of the first partial pressure unit 31 to hold as the input of the first partial pressure unit 31, the other end of first resistor.Second partial pressure
Unit 34 is second resistance, and one end of second resistance is the input 341 of the second partial pressure unit 34, and the other end of second resistance is
The output end 342 of second partial pressure unit 34.
As the another aspect of the utility model embodiment, the utility model embodiment provides a kind of ground wire test and set
It is standby.Wherein, the ground line testing device is including the ground line detection circuit described in any one, the ground line detection circuit exist as shown in Figure 1 to Figure 4
Effect in ground line testing device is identical with the effect in above-mentioned embodiment, will not be repeated here.
In the utility model embodiment, when detecting the ground contact state of external electrical equipment, work as external electrical
When the ground contact of equipment is good, acted on by the partial pressure of the first partial pressure unit and the second partial pressure unit, switch module, which enters, leads
Logical state, Tip element produce cue, and testing staff just knows that the ground contact of external electrical equipment is good.Conversely, work as
Tip element has not been able to produce cue, and testing staff just knows that the ground wire of external electrical equipment not yet installs.Therefore, originally
Utility model embodiment provide ground wire detection circuit structure it is simple, circuit cost is low and can produce cue in time
To prompt testing staff.
It should be noted that preferably implementation of the present utility model is given in specification of the present utility model and its accompanying drawing
Mode, still, the utility model can be realized by many different forms, however it is not limited to the implementation described by this specification
Mode, these embodiments are not as the extra limitation to the utility model content, there is provided the purpose of these embodiments is to make
Understanding more thorough and comprehensive to disclosure of the present utility model.Also, above-mentioned each technical characteristic continues to be mutually combined, formed
The various embodiments not being enumerated above, it is accordingly to be regarded as the scope of the utility model specification record；Further, to this area
For those of ordinary skill, it can according to the above description be improved or be converted, and all these modifications and variations should all belong to
The protection domain of the appended claims for the utility model.
Claims (10)
1. a kind of ground line detection circuit, it is characterised in that including switch module, the first partial pressure unit, Tip element and second point
Press unit；
The input connection live wire of first partial pressure unit, output end and the Tip element of first partial pressure unit
Input is connected, and the output end of the Tip element is connected with the input of the switch module；
The control terminal of the switch module is connected with the output end of second partial pressure unit, and the output end of the switch module connects
Connecting to neutral line, the input connection ground wire of second partial pressure unit.
2. ground according to claim 1 line detection circuit, it is characterised in that it is single that described ground line detection circuit also includes protection
Member, the protection location are series between the live wire and first partial pressure unit, the input connection of the protection location
Live wire, the output end of the protection location are connected with the input of first partial pressure unit.
3. ground according to claim 1 line detection circuit, it is characterised in that
The Tip element is LED, and the anode of the LED is the input of the Tip element, the negative electrode of the LED
For the output end of the Tip element；
Or
The Tip element is buzzer, and the anode of the buzzer is the input of the Tip element, the buzzer
Negative electrode is the output end of the Tip element.
4. ground according to claim 2 line detection circuit, it is characterised in that
The switch module is NPN type triode, and the base stage of the NPN type triode is the control terminal of the switch module, institute
State the input of the extremely described switch module of current collection of NPN type triode, the extremely described switch of transmitting of the NPN type triode
The output end of component；
The protection location is diode, the input of the just extremely described protection location of the diode, the diode
Negative pole is the output end of the protection location；
First partial pressure unit is first resistor, and one end of the first resistor is the input of first partial pressure unit,
The other end of the first resistor is the output end of first partial pressure unit；
Second partial pressure unit is second resistance, and one end of the second resistance is the input of second partial pressure unit,
The other end of the second resistance is the output end of second partial pressure unit.
5. a kind of ground line detection circuit, it is characterised in that including switch module, the first partial pressure unit, Tip element and second point
Press unit；
The input connection live wire of first partial pressure unit；
Input of the output end of first partial pressure unit respectively with the Tip element and the switch module is connected, described
The output end of Tip element and the switch module is all connected with zero line, the control terminal of the switch module and the second partial pressure list
The output end connection of member；
The input connection ground wire of second partial pressure unit.
6. ground according to claim 5 line detection circuit, it is characterised in that it is single that described ground line detection circuit also includes protection
Member, the protection location are series between the live wire and first partial pressure unit, the input connection of the protection location
Live wire, the output end of the protection location are connected with the input of first partial pressure unit.
7. ground according to claim 5 line detection circuit, it is characterised in that
The Tip element is LED, and the anode of the LED is the input of the Tip element, the negative electrode of the LED
For the output end of the Tip element.
8. ground according to claim 5 line detection circuit, it is characterised in that
The Tip element is buzzer, and the anode of the buzzer is the input of the Tip element, the buzzer
Negative electrode is the output end of the Tip element.
9. ground according to claim 6 line detection circuit, it is characterised in that
The switch module is NPN type triode, and the base stage of the NPN type triode is the control terminal of the switch module, institute
State the input of the extremely described switch module of current collection of NPN type triode, the extremely described switch of transmitting of the NPN type triode
The output end of component；
The protection location is diode, the input of the just extremely described protection location of the diode, the diode
Negative pole is the output end of the protection location；
First partial pressure unit is first resistor, and one end of the first resistor is the input of first partial pressure unit,
The other end of the first resistor is the output end of first partial pressure unit；
Second partial pressure unit is second resistance, and one end of the second resistance is the input of second partial pressure unit,
The other end of the second resistance is the output end of second partial pressure unit.
10. a kind of ground line testing device, including as described in claim 1-9 line detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720294279.8U CN207051411U (en) | 2017-03-22 | 2017-03-22 | A kind of ground line detection circuit and ground line testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720294279.8U CN207051411U (en) | 2017-03-22 | 2017-03-22 | A kind of ground line detection circuit and ground line testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207051411U true CN207051411U (en) | 2018-02-27 |
Family
ID=61489470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720294279.8U Active CN207051411U (en) | 2017-03-22 | 2017-03-22 | A kind of ground line detection circuit and ground line testing device |
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| Country | Link |
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| CN (1) | CN207051411U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147538A (en) * | 2020-09-27 | 2020-12-29 | 中国长城科技集团股份有限公司 | Equipment poor grounding alarm circuit, poor grounding alarm device and switch device |
-
2017
- 2017-03-22 CN CN201720294279.8U patent/CN207051411U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147538A (en) * | 2020-09-27 | 2020-12-29 | 中国长城科技集团股份有限公司 | Equipment poor grounding alarm circuit, poor grounding alarm device and switch device |
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Address after: 518000 101 (buildings 1-7), building 7, No. 58 Guangtian Road, Luotian community, Yanluo street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Jingchuang Technology Electronics Co.,Ltd. Address before: Part of 2-5, 7 and 6 / F, building C14, Fuyuan Industrial City, 598 Zhoushi Road, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN KING CHUANG TECH & ELECTRONIC Co.,Ltd. |