CN101877473B - 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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- CN101877473B CN101877473B CN2010101759707A CN201010175970A CN101877473B CN 101877473 B CN101877473 B CN 101877473B CN 2010101759707 A CN2010101759707 A CN 2010101759707A CN 201010175970 A CN201010175970 A CN 201010175970A CN 101877473 B CN101877473 B CN 101877473B
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- 230000001012 protector Effects 0.000 title claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000001052 transient effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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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. 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. 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 diodeD3 and the cathode of the fourth diode D4 are connected with the interface of the high-definition camera. The cathode of the third diode D3 and the anode of the fourth diode D4 are also connected with a TVS. Since 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.
Visible by Fig. 1: as to be connected with high-definition camera through 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.
Visible by Fig. 2: have only GDT (gas discharge tube) and TVS (transient state time variant voltage suppress diode) element in the Surge Protector, low-response, residual voltage is high, and transmission speed is slow, can not reach the requirement that high definition is transmitted.
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 realizes through following technical scheme:
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; After said TBU and the capacitor C parallel connection, the end of TBU is connected with the other end of a said GDT, and the other end of TBU links to each other with the interface of high-definition camera; 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; The negative pole of the first diode D1 links to each other with the negative pole of 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; Between the positive pole of the negative pole of the 3rd diode D3 and the 4th diode D4, also connect a TVS; Said TBU is a microampere current switch surge protection device; Said GDT is a gas discharge tube; Said TVS be transient state time variant voltage suppress diode.
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:
Visible by Fig. 3: as to 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: after said TBU and the capacitor C parallel connection, the end of TBU is connected with the other end of a said GDT, and the other end of TBU links to each other with the interface of high-definition camera; 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; The negative pole of the first diode D1 links to each other with the negative pole of 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; Between the positive pole of the negative pole of the 3rd diode D3 and the 4th diode D4, also connect a TVS; Said TBU is a microampere current switch surge protection device; Said GDT is a gas discharge tube; Said TVS be transient state time variant voltage suppress diode.
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 practiced thrift 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; After said TBU and the capacitor C parallel connection, the end of TBU is connected with the other end of a said GDT, and the other end of TBU links to each other with the interface of high-definition camera; 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; The negative pole of the first diode D1 links to each other with the negative pole of 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; Between the positive pole of the negative pole of the 3rd diode D3 and the 4th diode D4, also connect a TVS; Said TBU is a microampere current switch surge protection device; Said GDT is a gas discharge tube; Said 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 CN101877473A (en) | 2010-11-03 |
| CN101877473B true 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) |
Families Citing this family (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 |
| 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 |
| 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 |
Citations (3)
| 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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 protection device for surveillance cameras |
-
2010
- 2010-05-14 CN CN2010101759707A patent/CN101877473B/en not_active Expired - Fee Related
Patent Citations (3)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101877473A (en) | 2010-11-03 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20190514 |