CN101877473A - Protection circuit in surge protector used for high-definition camera - Google Patents
Protection circuit in surge protector used for high-definition camera Download PDFInfo
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- CN101877473A CN101877473A CN 201010175970 CN201010175970A CN101877473A CN 101877473 A CN101877473 A CN 101877473A CN 201010175970 CN201010175970 CN 201010175970 CN 201010175970 A CN201010175970 A CN 201010175970A CN 101877473 A CN101877473 A CN 101877473A
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Abstract
The invention relates to a protection circuit in a surge protector used for a high-definition camera. The protection circuit comprises one end of a first GDT and one end of a second GDT connected with an exterior line of a machinery room, wherein the other end of the second GDT is earthed. The protection circuit also comprises a TBU, wherein the other end of the first GDT and one end of the TBU are connected with one end of a capacitor C in parallel; the other end of the TBU is connected with the interface of the high-definition camera after being connected with the other end of the capacitor C in parallel; the other end of the TBU is also connected with the anode of a first diode D1 and the cathode of a second diode D2 after being connected with the other end of the capacitor C in parallel; the cathode of the first diode D1 is connected with the cathode of a third diode D3; the anode of the second diode D2 is connected with the anode of a fourth diode D4; the anode of the third diode D3 and the cathode of the fourth diode D4 are connected with the interface of the high-definition camera; and the cathode of the third diode D3 and the anode of the fourth diode D4 are also connected with a TVS. Because the TBU is of a current switching device, the surge protector has the characteristics of short response time, low residual voltage and fast transmission speed, and is suitable for the high-definition camera.
Description
Technical field
The present invention relates to a kind of protective circuit, relate in particular to a kind of Surge Protector protective circuit that is used for high-definition camera.
Background technology
Along with the development of social technical precaution (technological prevention measure) for social stability, keep the peace that it is very important to play a part, and the core of technical precaution is the enforcement of rig camera (global eyes).In order to make the operation reliably and with long-term of global eyes, surge protection plays a key effect, and most video cameras are owing to be installed in outdoor eminence, and electromagnetic environment is more abominable, and lightning hazards happens occasionally, and this proposes baptism to technical precaution work.
As seen from Figure 1: be connected with high-definition camera by the signal network line again after machine room passes through the signal network line and Surge Protector is connected.
Surge Protector of the prior art generally all is to adopt on the equipment that some device parallel connections need protection, and operate time of components and parts like this, performance superior opened key effect.Even but select present superior performance device for use, can not satisfy the requirement of high-definition camera.
As seen from Figure 2: have only GDT (gas discharge tube) and TVS (transient state time variant voltage suppress diode) element in the Surge Protector, low-response, the residual voltage height, transmission speed is slow, can not reach the requirement of high definition transmission.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of Surge Protector protective circuit that is used for high-definition camera, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The present invention includes: a GDT who links to each other with the outside line of machine room and the end of the 2nd GDT, the other end ground connection of the 2nd GDT; Also comprise: a TBU (microampere current switch surge protection device); The end of the other end of a described GDT and TBU and an end of capacitor C also connect; The other end of TBU links to each other with the interface of high-definition camera with the other end of capacitor C and after connecing; The other end of described TBU also links to each other with the positive pole of the first diode D1 and the negative pole of the second diode D2 with the other end of capacitor C and after connecing; The negative pole of the first diode D1 links to each other with negative pole with the 3rd diode D3; The positive pole of the second diode D2 links to each other with the positive pole of the 4th diode D4; The negative pole of the positive pole of the 3rd diode D3 and the 4th diode D4 links to each other with the interface of high-definition camera; Also be connected a TVS at the negative pole of the 3rd diode D3 and the positive pole of the 4th diode D4.
Compared with prior art, the invention has the beneficial effects as follows: because TBU is the current switching mode element, the response time is short, and residual voltage is low, and transmission speed is fast, could be fit to high-definition camera like this.
Description of drawings
Fig. 1 is Surge Protector and high-definition camera module connection layout;
Fig. 2 is the protective circuit figure of Surge Protector in the prior art;
Fig. 3 is a circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
As seen from Figure 3: the present invention includes: a GDT who links to each other with the outside line of machine room and the end of the 2nd GDT, the other end ground connection of the 2nd GDT; Also comprise: a TBU (microampere current switch surge protection device); The end of the other end of a described GDT and TBU and an end of capacitor C also connect; The other end of TBU links to each other with the interface of high-definition camera with the other end of capacitor C and after connecing; The other end of described TBU also links to each other with the positive pole of the first diode D1 and the negative pole of the second diode D2 with the other end of capacitor C and after connecing; The negative pole of the first diode D1 links to each other with negative pole with the 3rd diode D3; The positive pole of the second diode D2 links to each other with the positive pole of the 4th diode D4; The negative pole of the positive pole of the 3rd diode D3 and the 4th diode D4 links to each other with the interface of high-definition camera; Also be connected a TVS at the negative pole of the 3rd diode D3 and the positive pole of the 4th diode D4.
TBU is current switching mode device in the prior art among the present invention, and operate as normal is that circuit does not have electric current to pass through, and TBU is in the conducting operate as normal; When having weak current to pass through in the circuit, the TBU action is in open mode, so just protects video camera.
Adopt above technical scheme can satisfy the shocking preventing technology requirement and also can satisfy the equipment performance requirement simultaneously, so not only saved equipment cost, also can guarantee the operation that the thunderstorm season high-definition camera is safe and reliable simultaneously.
Claims (1)
1. a Surge Protector protective circuit that is used for high-definition camera comprises: a GDT who links to each other with the outside line of machine room and the end of the 2nd GDT, the other end ground connection of the 2nd GDT; It is characterized in that also comprising: a TBU; The end of the other end of a described GDT and TBU and an end of capacitor C also connect; The other end of TBU links to each other with the interface of high-definition camera with the other end of capacitor C and after connecing; The other end of described TBU also links to each other with the positive pole of the first diode D1 and the negative pole of the second diode D2 with the other end of capacitor C and after connecing; The negative pole of the first diode D1 links to each other with negative pole with the 3rd diode D3; The positive pole of the second diode D2 links to each other with the positive pole of the 4th diode D4; The negative pole of the positive pole of the 3rd diode D3 and the 4th diode D4 links to each other with the interface of high-definition camera; Also be connected a TVS at the negative pole of the 3rd diode D3 and the positive pole of the 4th diode D4; Described TBU is a microampere current switch surge protection device; Described GDT is a gas discharge tube; Described TVS be transient state time variant voltage suppress diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101759707A CN101877473B (en) | 2010-05-14 | 2010-05-14 | Protection circuit in surge protector used for high-definition camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101759707A CN101877473B (en) | 2010-05-14 | 2010-05-14 | Protection circuit in surge protector used for high-definition camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101877473A true CN101877473A (en) | 2010-11-03 |
| CN101877473B CN101877473B (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101759707A Expired - Fee Related CN101877473B (en) | 2010-05-14 | 2010-05-14 | Protection circuit in surge protector used for high-definition camera |
Country Status (1)
| Country | Link |
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| CN (1) | CN101877473B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171308A (en) * | 2017-07-20 | 2017-09-15 | 四川赛尔特科技有限公司 | Ultrahigh speed Ethernet monitors surge protection device |
| CN107221923A (en) * | 2017-07-20 | 2017-09-29 | 四川赛尔特科技有限公司 | A kind of coaxial high definition power supply video two-in-one lightning |
| CN107230973A (en) * | 2017-07-20 | 2017-10-03 | 四川赛尔特科技有限公司 | A kind of single channel 3G HD videos Bidirectional lightning protection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2891530Y (en) * | 2006-04-20 | 2007-04-18 | 董飚 | Lightning proof video camera |
| CN2938632Y (en) * | 2006-08-03 | 2007-08-22 | 陈延行 | Anti-thunderstrike camera |
| KR100907943B1 (en) * | 2008-11-04 | 2009-07-16 | 김병학 | Integrated surge protector for cctv |
| KR20100025155A (en) * | 2008-08-27 | 2010-03-09 | 주식회사 에스티에스코리아 | Surge protective apparatus for security camera |
| CN201674201U (en) * | 2010-05-14 | 2010-12-15 | 上海科晗实业有限公司 | Protection circuit in surge protective device for high definition camera |
-
2010
- 2010-05-14 CN CN2010101759707A patent/CN101877473B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2891530Y (en) * | 2006-04-20 | 2007-04-18 | 董飚 | Lightning proof video camera |
| CN2938632Y (en) * | 2006-08-03 | 2007-08-22 | 陈延行 | Anti-thunderstrike camera |
| KR20100025155A (en) * | 2008-08-27 | 2010-03-09 | 주식회사 에스티에스코리아 | Surge protective apparatus for security camera |
| KR100907943B1 (en) * | 2008-11-04 | 2009-07-16 | 김병학 | Integrated surge protector for cctv |
| CN201674201U (en) * | 2010-05-14 | 2010-12-15 | 上海科晗实业有限公司 | Protection circuit in surge protective device for high definition camera |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171308A (en) * | 2017-07-20 | 2017-09-15 | 四川赛尔特科技有限公司 | Ultrahigh speed Ethernet monitors surge protection device |
| CN107221923A (en) * | 2017-07-20 | 2017-09-29 | 四川赛尔特科技有限公司 | A kind of coaxial high definition power supply video two-in-one lightning |
| CN107230973A (en) * | 2017-07-20 | 2017-10-03 | 四川赛尔特科技有限公司 | A kind of single channel 3G HD videos Bidirectional lightning protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101877473B (en) | 2012-11-14 |
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Granted publication date: 20121114 Termination date: 20190514 |
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| CF01 | Termination of patent right due to non-payment of annual fee |