CN202142851U - Gun-type camera overvoltage protection circuit - Google Patents
Gun-type camera overvoltage protection circuit Download PDFInfo
- Publication number
- CN202142851U CN202142851U CN201120282744U CN201120282744U CN202142851U CN 202142851 U CN202142851 U CN 202142851U CN 201120282744 U CN201120282744 U CN 201120282744U CN 201120282744 U CN201120282744 U CN 201120282744U CN 202142851 U CN202142851 U CN 202142851U
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- module
- discharge tube
- overvoltage crowbar
- video
- power
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Abstract
The utility model discloses a gun-type camera overvoltage protection circuit, so as to solve the problem that in the prior art gun-type cameras are easily damaged by pulse voltage. The gun-type camera overvoltage protection circuit is characterized in that an audio module is connected with an overvoltage protection circuit module, which is a control circuit composed of a power unit, a signal device and a ground protection unit, wherein the power unit is connected with the power module and the signal device is connected with the audio module; the power unit consists of an inductor, a discharge tube and a suppression diode; and the signal device is constituted by a rectifier bridge and a discharge tube. With a simple and reliable structure, the gun-type camera overvoltage protection circuit of the utility model is suitable for various installation environments and can be completely prevented from being damaged by pulse voltage.
Description
Technical field
The utility model relates to rifle formula camera apparatus field, specifically refers to a kind of rifle formula video camera overvoltage crowbar that is installed in suppressor pulse voltage on the rifle formula video camera.
Background technology
Along with the construction development of urban traffic road, all kinds of monitoring equipments such as rifle formula video camera use very general, and these equipment are installed in the outdoor harm that is easy to receive circuit thunder and lightning induction and surge voltage at thundery sky.Through adding lightning protection for power supply video camera is protected in the market; Yet the protection for the induction thunder also is in the outside protection stage; Just before circuit gets into video camera, externally install lightning protection device additional, this device receives the restriction of geographical environment and installing space, also must add some auxiliary equipment and just can; Mate compatibility issue in addition between video camera and the lightning protection device in addition, certainly will will increase the probability of failure of video camera.
Summary of the invention
The utility model purpose is: a kind of rifle formula video camera overvoltage crowbar simple in structure is provided, and pulse voltage is prone to the problem that infringement rifle formula video camera damages in the prior art to solve.
Reaching the technical scheme that the purpose of the utility model takes is: a kind of rifle formula video camera overvoltage crowbar; Comprise rifle formula pick-up lens, video signal collective module, be used for the power module and the control module of the input of power supply and control signal; Said video module is connected with the control module of rifle formula pick-up lens, power module and processing control signals respectively; It is characterized in that: said video module also is connected with the overvoltage crowbar module that is provided with; The control circuit that said overvoltage crowbar module is made up of power subsystem, signal device and ground protection unit; Wherein power subsystem connects described power module, and signal device connects video module, and wherein power subsystem is made up of inductance, discharge tube and inhibition diode; Said signal device is made up of rectifier bridge, discharge tube; Said ground protection unit is made up of piezo-resistance and discharge tube, and introduces earth terminal.
Described discharge tube comprises two utmost point gas discharge tubes and three utmost point gas discharge tubes, and three utmost point gas discharge tubes are connected with inductance with two utmost point gas discharge tubes respectively.
Parallel connection LED lamp on the described discharge tube connection line.
The utility model rifle formula video camera overvoltage crowbar; With video signal collective module, the overvoltage crowbar module of video signal collective and be used for power supply and the power module of control signal input and control module connect and be made as one, to overcome that existing video camera is installed outside lightning protection device and the problems that cause.
The beneficial effect that the utility model reaches is: the utility model has reached simple and reliable for structure, adapts to various installation environments, can avoid receiving the beneficial effect of the problem that pulse voltage damages fully.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model overvoltage crowbar module.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Be to be understood that practical implementation instance described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model rifle formula video camera overvoltage crowbar is to protect to the outdoor pick-up machine, damaged by thunderbolt to prevent road or plant area's safety defense monitoring system in the thunderstorm weather accident.Like Fig. 1; Shown in 2; The utility model structure comprises rifle formula pick-up lens, and it is installed and fixed by the intrinsic shell of video camera; And also be provided with video signal collective module 2, the overvoltage crowbar module 3 that is used for video signal collective, power module 4 and the grounded parts 6 that is used for camera power supply and control signal input in the enclosure; Wherein the input of video module 2 is connected with rifle formula pick-up lens 1, and output connects overvoltage crowbar module 3, and the video module 2 that is connected with power module 4 also is connected with external control module 5.Establish the digital image processing chip in the described video module 2, have characteristics such as highly sensitive, high s/n ratio.Join shown in Figure 2; The control circuit that the said overvoltage crowbar module 3 mountain power subsystems of the utility model, signal device and ground protection unit are formed; Wherein power subsystem connects described power module 4; Signal device connects video module 2 and external control module 5, and control module 5 can be DVR or other image processors; Said power subsystem is made up of two inductance L, discharge tube and inhibition diode 13 in addition; Described discharge tube comprises two utmost point gas discharge tubes 7 and three utmost point gas discharge tubes 10; Three utmost point gas discharge tubes 10 are connected with inductance L with two utmost point gas discharge tubes 7 respectively, and link to each other with grounded parts 6; Suppress diode 13 and connect,, respond the soonest, can spark to generation after the lightning current that gets into overvoltage crowbar module 3 or the surge inhibition, and introduce underground rapidly because it is minimum to suppress the energy of diode 13 with three grades of gas discharge tubes 10; Said signal device is made up of rectifier bridge 8 and the solid discharging tube 8 that is attached thereto, and can carry out Filtering Processing to vision signal and the power supply signal that gets into overvoltage crowbar module 3; Said ground protection unit is made up of metal oxide piezo-resistance 12 and secondary gas discharge tube 11, and introduces earth terminal.
After the utility model connected video line and power line, overvoltage crowbar module 3 had been connected to video module 2 after will carrying out filtering and isolate these two groups of circuits, thereby video camera is carried out online protection.When lightning current or the entering of surge road along the line; Because voltage is much higher than the operating voltage of video camera; Said piezo-resistance 12 can start in the time of nanosecond, cooperates discharge tube with the lightning current major part the earth of releasing simultaneously, thereby the protection video camera is avoided the damage of thunder and lightning.The utility model is installed in the camera housing, is used as grounded parts 6 through the metalwork on the shell such as support, screw, and is simple and reliable for structure, also avoids the possibility of imperfect earth initiating failure.The utility model generally is installed in outdoor; For the ease of observing and detecting; Parallel connection LED lamp on the circuit that said gas discharge tube connects, when strong direct lightning strike took place, its voltage strength was destroyed lightning protection mould and is determined after 3; Described LED lamp will be warned staff's replacing or maintenance overvoltage crowbar module 3, and will be simple and reliable.The utility model rifle formula video camera overvoltage crowbar adapts to various installation environments, can avoid fully receiving lightning impulse and damages, and realizes the automatic control of signal, not only is suitable for and the road monitoring system, also is suitable for safety of environment monitoring such as plant area.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (3)
1. rifle formula video camera overvoltage crowbar; Comprise rifle formula pick-up lens, video signal collective module, be used for the power module and the control module of the input of power supply and control signal; Said video module is connected with the control module of rifle formula pick-up lens, power module and processing control signals respectively; It is characterized in that: said video module also is connected with the overvoltage crowbar module that is provided with; The control circuit that said overvoltage crowbar module is made up of power subsystem, signal device and ground protection unit; Wherein power subsystem connects described power module, and signal device connects video module, and wherein power subsystem is made up of inductance, discharge tube and inhibition diode; Said signal device is made up of rectifier bridge, discharge tube; Said ground protection unit is made up of piezo-resistance and discharge tube, and introduces earth terminal.
2. according to the said rifle formula of claim 1 video camera overvoltage crowbar, it is characterized in that: described discharge tube comprises two utmost point gas discharge tubes and three utmost point gas discharge tubes, and three utmost point gas discharge tubes are connected with inductance with two utmost point gas discharge tubes respectively.
3. according to the said rifle formula of claim 1 video camera overvoltage crowbar, it is characterized in that: parallel connection LED lamp on the described discharge tube connection line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120282744U CN202142851U (en) | 2011-08-05 | 2011-08-05 | Gun-type camera overvoltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120282744U CN202142851U (en) | 2011-08-05 | 2011-08-05 | Gun-type camera overvoltage protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202142851U true CN202142851U (en) | 2012-02-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120282744U Expired - Fee Related CN202142851U (en) | 2011-08-05 | 2011-08-05 | Gun-type camera overvoltage protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202142851U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014067272A1 (en) * | 2012-10-31 | 2014-05-08 | 华为技术有限公司 | Protective apparatus |
-
2011
- 2011-08-05 CN CN201120282744U patent/CN202142851U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014067272A1 (en) * | 2012-10-31 | 2014-05-08 | 华为技术有限公司 | Protective apparatus |
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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: 20120208 Termination date: 20120805 |