CN202794427U - Ground wire breakage automatic alarm - Google Patents
Ground wire breakage automatic alarm Download PDFInfo
- Publication number
- CN202794427U CN202794427U CN 201220522863 CN201220522863U CN202794427U CN 202794427 U CN202794427 U CN 202794427U CN 201220522863 CN201220522863 CN 201220522863 CN 201220522863 U CN201220522863 U CN 201220522863U CN 202794427 U CN202794427 U CN 202794427U
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- triode
- ground wire
- power supply
- automatic alarm
- resistance
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Abstract
The utility model provides a ground wire breakage automatic alarm, belonging to alarms. The ground wire breakage automatic alarm comprises a first resistor and a grounding detection wire, which are connected in series. A base electrode of a first triode is connected between the first resistor and the grounding detection wire. The two ends of a second resistor and a light emitting diode, which are connected in series, are respectively connected with an anode of a power supply and an anode of a silicon-controlled rectifier. Power supply terminal of a sound source chip are also respectively connected with the anode of the power supply and the anode of the silicon-controlled rectifier. An output terminal of the sound source chip is connected with a base electrode of a second triode. A cathode of the silicon-controlled rectifier is grounded. When a ground wire is broken, the automatic alarm can immediately send out an acousto-optic alarm signal to warn people to carry out maintenance timely, thereby improving utilization safety of an electrical control cabinet. Moreover, the ground wire breakage automatic alarm is simple in structure, reliable in work, low in manufacture cost, and good in utilization effect. Apart from being applicable to the electrical control cabinet, the ground wire breakage automatic alarm also can be used for alarming of breakage of ground wires of lightning conductors and the like.
Description
Technical field
The utility model provides a kind of warning device, the disconnected warning device that takes off of especially a kind of ground wire.
Background technology
In electrical control cashier's office in a shop, ground wire is important safety guard.Although but some ground wire seems contact well, in fact oxidation or disconnected taking off, inner loose contact, this just has a strong impact on the security that electrical control cabinet uses.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of ground wire the disconnected autoalarm that takes off, the security of using to improve electrical control cabinet.
The utility model is to realize like this, the disconnected autoalarm that takes off of ground wire, it has the first resistance and the ground connection detection line that is chained together, the base stage of the first triode is connected between the first resistance and the ground connection detection line, one end of the emitter of the first triode and the 3rd resistance is electrically connected, the other end of the 3rd resistance is connected on respectively on the control end of an end of the first electric capacity and one-way SCR, the other end ground connection of the first electric capacity, the second resistance that is chained together, the light emitting diode two ends are connected on the positive pole of the positive pole of power supply and one-way SCR, the power end of sound source chip also is connected on the positive pole of the positive pole of power supply and one-way SCR, the base stage of the output terminal of sound source chip and the second triode links together, the emitter order of the second triode is anodal to silicon controlled, the base stage of collector and the 3rd triode is electrically connected, the emitter of the 3rd triode connects positive source, collector is anodal to silicon controlled through the loudspeaker order, the minus earth of one-way SCR.
At described power supply bridge rectifier circuit is arranged, the input end of bridge rectifier circuit and the secondary coil of transformer are electrically connected, and the output terminal cross-over connection of bridge rectifier circuit has the second electric capacity.
Adopt the disconnected autoalarm that takes off of ground wire of said structure, can when occuring that ground wire is disconnected to be taken off, send immediately the sound and light alarm signal, remind people in time to keep in repair, thereby improved the security that electrical control cabinet uses.And rational in infrastructure, reliable operation, low cost of manufacture, result of use is good.Upper outside except can be used on electrical control cabinet, also can be used for the disconnected warnings of taking off of ground wire such as lightning conducter.
Description of drawings
Fig. 1 is the synoptic diagram of the utility model circuit structure.
Embodiment
The embodiment that provides below in conjunction with accompanying drawing further specifies the utility model.
As shown in drawings, the disconnected autoalarm that takes off of the ground wire of the utility model, it has the first resistance R 1 and the ground connection detection line S that is chained together, the base stage of the first triode BG1 is connected between the first resistance and the ground connection detection line, one end of the emitter of the first triode and the 3rd resistance R 3 is electrically connected, the other end of the 3rd resistance is connected on respectively on the control end of an end of the first capacitor C 1 and unidirectional controllable silicon S CR, the other end ground connection of the first electric capacity, the second resistance R 2 that is chained together, the LED two ends are connected on the positive pole of the positive pole of power supply and one-way SCR, the power end of sound source chip IC also is connected on the positive pole of the positive pole of power supply and one-way SCR, the base stage of the output terminal of sound source chip and the second triode BG2 links together, the emitter order of the second triode is anodal to silicon controlled, the base stage of collector and the 3rd triode BG3 is electrically connected, the emitter of the 3rd triode connects positive source, collector is anodal to silicon controlled through loudspeaker Y order, the minus earth of unidirectional controllable silicon S CR.
During use, the ground connection detection line is connected on the contact of ground wire.The first resistance R 1 provides bias voltage for the first triode BG1 base stage.Plugged K switch 1, when ground wire was normal, the first resistance was through ground connection detection line S shorted to earth, and the first triode is not worked.If it is that the ground connection detection line disconnects that ground wire disconnects, the first triode immediately electric work, the electric current of the emitter of the first triode triggers unidirectional controllable silicon S CR conducting through the 3rd resistance R 3, LED is lighted, sound source chip get electric after, the alarm sound signal of output drives loudspeaker Y and sends alarm sound after the second triode, the 3rd triode amplify.Disconnecting power switch at this moment, even connect the ground connection detection line, also continues to send alerting signal, unless can prevent wrong report like this.
At described power supply bridge rectifier circuit Q is arranged, the secondary coil of the input end of bridge rectifier circuit and transformer B is electrically connected, and the output terminal cross-over connection of bridge rectifier circuit has the second capacitor C 2.This rectification filtering voltage stabilizing circuit is as the power supply of this alarm.Obviously, power supply also can adopt battery.
The sound source chip that can be used for this warning device has multiple, such as SAM3516 sound source chip, Mei Deli M10 sound source chip etc., but choice for use.
Claims (2)
1. the disconnected autoalarm that takes off of ground wire, it is characterized in that, it has the first resistance R 1 and the ground connection detection line S that is chained together, the base stage of the first triode BG1 is connected between the first resistance and the ground connection detection line, one end of the emitter of the first triode and the 3rd resistance R 3 is electrically connected, the other end of the 3rd resistance is connected on respectively on the control end of an end of the first capacitor C 1 and unidirectional controllable silicon S CR, the other end ground connection of the first electric capacity, the second resistance R 2 that is chained together, the LED two ends are connected on the positive pole of the positive pole of power supply and one-way SCR, the power end of sound source chip IC also is connected on the positive pole of the positive pole of power supply and one-way SCR, the base stage of the output terminal of sound source chip and the second triode BG2 links together, the emitter order of the second triode is anodal to silicon controlled, the base stage of collector and the 3rd triode BG3 is electrically connected, the emitter of the 3rd triode connects positive source, collector is anodal to silicon controlled through loudspeaker Y order, the minus earth of unidirectional controllable silicon S CR.
2. the disconnected autoalarm that takes off of ground wire as claimed in claim 1, it is characterized in that, at described power supply bridge rectifier circuit Q is arranged, the secondary coil of the input end of bridge rectifier circuit and transformer B is electrically connected, and the output terminal cross-over connection of bridge rectifier circuit has the second capacitor C 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220522863 CN202794427U (en) | 2012-10-13 | 2012-10-13 | Ground wire breakage automatic alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220522863 CN202794427U (en) | 2012-10-13 | 2012-10-13 | Ground wire breakage automatic alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794427U true CN202794427U (en) | 2013-03-13 |
Family
ID=47821669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220522863 Expired - Fee Related CN202794427U (en) | 2012-10-13 | 2012-10-13 | Ground wire breakage automatic alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202794427U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535592A (en) * | 2017-03-03 | 2018-09-14 | 徐志军 | Power equipment smart grounding line |
| CN109270356A (en) * | 2018-11-22 | 2019-01-25 | 国网宁夏电力有限公司宁东供电公司 | Substation grounding point impedance ground intelligent monitoring and controlling device and instrument controlling method |
-
2012
- 2012-10-13 CN CN 201220522863 patent/CN202794427U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535592A (en) * | 2017-03-03 | 2018-09-14 | 徐志军 | Power equipment smart grounding line |
| CN109270356A (en) * | 2018-11-22 | 2019-01-25 | 国网宁夏电力有限公司宁东供电公司 | Substation grounding point impedance ground intelligent monitoring and controlling device and instrument controlling method |
| CN109270356B (en) * | 2018-11-22 | 2024-06-14 | 国网宁夏电力有限公司宁东供电公司 | Intelligent monitoring device for grounding impedance of transformer substation grounding point and instrument control method |
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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: 20130313 Termination date: 20131013 |