CN203553918U - Video-monitoring circuit three-in-one surge protector - Google Patents
Video-monitoring circuit three-in-one surge protector Download PDFInfo
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- CN203553918U CN203553918U CN201320578017.6U CN201320578017U CN203553918U CN 203553918 U CN203553918 U CN 203553918U CN 201320578017 U CN201320578017 U CN 201320578017U CN 203553918 U CN203553918 U CN 203553918U
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- surge protector
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Abstract
The utility model provides a video-monitoring circuit three-in-one surge protector, and the surge protector is characterized in that the surge protector consists of a box body, a power circuit protection module, a video circuit protection module, and a pan-tilt control circuit protection module, wherein the power circuit protection module, the video circuit protection module and the pan-tilt control circuit protection module are integrated in the box body. The box body is provided with three input ports and three output ports, wherein the three input ports are respectively corresponding to power input, video input and pan-tilt control input, and the three output ports are respectively corresponding to power output, video output, and pan-tilt control output. The three-in-one surge protector is installed in an equipment circuit of a monitoring probe. A monitoring-equipment video signal circuit, a pan-tilt control signal circuit and a power supply circuit are respectively connected through the three input ports of the three-in-one surge protector, and are respectively connected to the monitoring probe through the three output ports. The three-in-one surge protector provided by the utility model is large in thunder discharge current capacity, is low in residual voltage, is short in response time, is low in insertion loss, and can carry out concentrated protection for an outdoor monitoring probe, and the video signal circuit, the pan-tilt control signal circuit and the power supply circuit, wherein the video signal circuit, the pan-tilt control signal circuit and the power supply circuit are introduced to the indoor monitoring equipment from the outside.
Description
Technical field
The utility model relates to a kind of Surge Protector, relates in particular to the three-in-one Surge Protector of a kind of video monitoring circuit, belongs to the carrying out surge protection technical field of electronic electric equipment.
Background technology
Video monitoring system is the important component part of safety-protection system, it is the integrated system that prevention ability is very strong, directly perceived with it, accurately, in time and the information content abundant and be widely used in each field and in ensureing the person, property, production safety, play a part very important, at some important place, as supervisory control system breaks down and can not normally move and may cause very serious adverse consequences, and Lightning Electromagnetic Pulse is one of major reason causing supervisory control system damage.
Watch-dog integrated level is high, very responsive to all kinds of electromagnetic pulse interference, and a lot of monitoring probes installation site is more spacious, its signal transmission line and supply line's outdoor laid distance are long, in this environment, thunder and lightning very easily causes system works undesired by these line influence intrusion equipment, even damages.The residual voltage of common Surge Protector its generation after thunder and lightning passes through is still very high; its discharge capacity is smaller; in adverse circumstances, long-term use is easily aging; the protection aspect of supply line particularly; because the aging heating of protection component can not be separated from from protected circuit rapidly; make most probably protector catching fire, bring disaster to the security of operation of whole supervisory control system.Prior art is not directed to the surge protective device of video monitoring equipment design specially.
In view of this, be necessary to provide a kind of video monitoring circuit three-in-one Surge Protector, to address the above problem.
Summary of the invention
The purpose of this utility model is: for above-mentioned present situation; aim to provide the three-in-one Surge Protector of video monitoring circuit that a kind of thunder and lightning discharge capacity is large, residual voltage is low, the response time is fast, insertion loss is little; can carry out concentrated protection to the vision signal circuit of outdoor monitoring probe and outdoor introducing Indoor Video equipment, cradle head control signal line, supply line, prevent that thunder and lightning and other electromagnetic interference from invading equipment from circuit.
The technical scheme that the utility model adopts is: the three-in-one Surge Protector of a kind of video monitoring circuit, it is characterized in that, by box body and be integrated in the power supply in box body, video, three circuit protection modules of cradle head control form, on box body, there are three input ports and three output ports, corresponding power input respectively, video input, cradle head control input and power supply output, video output, cradle head control output, described three-in-one Surge Protector is installed on the device line of monitoring probe, watch-dog vision signal, three kinds of circuits of cradle head control signal and power supply access through three input ports of three-in-one Surge Protector respectively, and be connected on monitoring probe through three output ports.
The three-in-one Surge Protector of video monitoring circuit as above, is characterized in that, described power circuit protection module is taked two-stage protection, decoupling inductance and the large discharge capacity piezo-resistance with overheat protective function, consists of.
The three-in-one Surge Protector of video monitoring circuit as above; it is characterized in that; the described large discharge capacity piezo-resistance with overheat protective function is designed to temperature safety element and MOV chip to carry out integrative packaging; temperature safety element is closely attached to the easy heating position of MOV chip center; the sensitive heating situation that senses MOV of energy; when MOV reaches certain value because of heating temp, temperature safety element action, makes MOV hightail from protected power circuit.
The three-in-one Surge Protector of video monitoring circuit as above; it is characterized in that; the circuit of described video circuit protection module and cradle head control circuit protection module is all taked two-stage protection; prime is used GDT gas discharge tube; final stage adopts two-way TVS Transient Suppression Diode, is connected in series PTC from recovering insurance resistance between two-stage.
The beneficial effects of the utility model are: its thunder and lightning discharge capacity of three-in-one Surge Protector of the present utility model is large, residual voltage is low, the response time is fast, insertion loss is little; Can carry out concentrated protection to the vision signal circuit of outdoor monitoring probe and outdoor introducing Indoor Video equipment, cradle head control signal line, supply line; when inner Anti-surging element occurs deteriorated while causing temperature to raise; can sensitively make rapidly Surge Protector depart from and come from protected circuit, avoid circuit catching fire.
Accompanying drawing explanation
Fig. 1 is the structural representation of the three-in-one Surge Protector of the utility model
Fig. 2 is the inside schematic diagram of the three-in-one Surge Protector of the utility model.
Embodiment
In order to understand better the utility model, below in conjunction with embodiment, further illustrate content of the present utility model, but content of the present utility model is not only confined to the following examples.Those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values are equally within the listed claims limited range of the application.
Description of reference numerals: IN-protector input, OUT-protector output, TVS-Transient Suppression Diode, MOV-piezo-resistance, L-inductance, MOV-F-have overtemperature protection piezo-resistance, D-Fang Qiao, PTC-certainly recover insurance resistance, GDT-gas discharge tube.
The utility model is described in detail in detail below:
With reference to Fig. 1, Surge Protector is integrated, and is installed in series on watch-dog vision signal, cradle head control signal and three kinds of circuits of power supply, to sensing that the LEMP of this circuit concentrates protection, prevents that watch-dog is struck by lightning.Specific design is as follows:
Surge Protector is installed in series on the circuit of protected equipment; OUT termination is near protected equipment end, and the IN head joint equipment circuit other end, when circuit has thunder and lightning or other transient overvoltage to invade; earial drainage pressure limiting is carried out in protector startup work, ensures watch-dog safety.Concrete method of attachment:
The L/+ of the input of the power supply connection protector of camera, N/-inside export equipment to after the pressure cell of two-stage band overcurrent and overheating protection device and decoupler.
Video signal cable near camera one end accesses protector delivery outlet by BNC head; another termination input port; protector is inner adopts gas discharge tube and Transient Suppression Diode, bridge circuit, PTC resistance (certainly recovering insurance resistance) to work in coordination, and makes that its through-current capacity is large, residual voltage is low, insertion loss is little.
The cradle head control holding wire of close camera one end accesses protector output wiring terminal, another termination input terminal, and gas discharge tube, Transient Suppression Diode are passed through in inside, resistance cooperation is insured in recovery certainly.
As shown in Figure 2, be the inside schematic diagram of the three-in-one Surge Protector of the utility model.Specific as follows:
1, vision signal and cradle head control circuit are all taked two-stage protection; prime is used the strong GDT(gas discharge tube of through-current capability); the two-way TVS(Transient Suppression Diode that the final stage employing response time is exceedingly fast); TVS is connected in bridge circuit to reduce the impact of components and parts selfcapacity; the transmission frequency that improves Surge Protector, reduces the decay of Surge Protector to vision signal.Between two-stage, be connected in series PTC resistance (certainly recovering insurance resistance), under normal operation circumstances, PTC is low resistive state, once having overcurrent passes through, PTC temperature raises, and it is large that resistance becomes rapidly, when line work electric current recovers normal, PTC returns to again low resistive state, by PTC, just can ensure that GDT and TVS are good fit like this, make lightning current major part let out inflow place by the strong GDT of through-current capacity, the residual voltage that its result produces thunder and lightning is limited in the level that equipment bears.
2, supply line takes two-stage protection; according to coordinating with decoupling inductance between lightning wave characteristic two-stage; the main energy of lightning current is released from the large through-flow device of the first order; rear class protection device divides to walk remaining less lightning current; reduced residual voltage, and guaranteed that circuit is lossless to power current or direct current.
Due to the lightning protection element (MOV) of long-time running in working power circuit, owing to repeatedly standing thunder and lightning or other overvoltage, may cause MOV performance change or damage, MOV there will be the even short circuit of generating heat, if this device can not be separated from from supply line rapidly, easily cause power supply work undesired, when serious, there will be catching fire phenomenon, in order effectively to avoid this phenomenon to occur, special design temperature safety element and MOV chip are carried out to integrative packaging, temperature safety element is tightly attached to the easy heating position of MOV chip center, the sensitive heating situation that senses MOV of energy, when MOV reaches 105 ℃ because of aging heating temp, Temperature protection action, MOV is hightailed from protected power circuit, Surge Protector working station indicator extinguishes simultaneously, informing that user's Surge Protector had lost efficacy needs to change.
The foregoing is only embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model.
Claims (4)
1. the three-in-one Surge Protector of video monitoring circuit, it is characterized in that, by box body and be integrated in the power supply in box body, video, three circuit protection modules of cradle head control form, on box body, there are three input ports and three output ports, corresponding power input respectively, video input, cradle head control input and power supply output, video output, cradle head control output, described three-in-one Surge Protector is installed on the device line of monitoring probe, watch-dog vision signal, three kinds of circuits of cradle head control signal and power supply access through three input ports of three-in-one Surge Protector respectively, and be connected on monitoring probe through three output ports.
2. the three-in-one Surge Protector of video monitoring circuit according to claim 1, is characterized in that, described power circuit protection module is taked two-stage protection, decoupling inductance and the large discharge capacity piezo-resistance with overheat protective function, consists of.
3. the three-in-one Surge Protector of video monitoring circuit according to claim 2; it is characterized in that; the described large discharge capacity piezo-resistance with overheat protective function is designed to temperature safety element and MOV chip to carry out integrative packaging; temperature safety element is closely attached to the easy heating position of MOV chip center; the sensitive heating situation that senses MOV of energy; when MOV reaches certain value because of heating temp, temperature safety element action, makes MOV hightail from protected power circuit.
4. the three-in-one Surge Protector of video monitoring circuit according to claim 1; it is characterized in that; the circuit of described video circuit protection module and cradle head control circuit protection module is all taked two-stage protection; prime is used GDT gas discharge tube; final stage adopts two-way TVS Transient Suppression Diode, is connected in series PTC from recovering insurance resistance between two-stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320578017.6U CN203553918U (en) | 2013-09-18 | 2013-09-18 | Video-monitoring circuit three-in-one surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320578017.6U CN203553918U (en) | 2013-09-18 | 2013-09-18 | Video-monitoring circuit three-in-one surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203553918U true CN203553918U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320578017.6U Expired - Fee Related CN203553918U (en) | 2013-09-18 | 2013-09-18 | Video-monitoring circuit three-in-one surge protector |
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| Country | Link |
|---|---|
| CN (1) | CN203553918U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790245A (en) * | 2016-03-30 | 2016-07-20 | 广州万锐照明设备有限公司 | Signal protection structure |
| CN113036920A (en) * | 2021-03-10 | 2021-06-25 | 广东电网有限责任公司电力调度控制中心 | Transformer substation video monitoring system and protective box thereof |
| TWI762134B (en) * | 2020-12-31 | 2022-04-21 | 致茂電子股份有限公司 | Surge protection module |
-
2013
- 2013-09-18 CN CN201320578017.6U patent/CN203553918U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790245A (en) * | 2016-03-30 | 2016-07-20 | 广州万锐照明设备有限公司 | Signal protection structure |
| TWI762134B (en) * | 2020-12-31 | 2022-04-21 | 致茂電子股份有限公司 | Surge protection module |
| CN113036920A (en) * | 2021-03-10 | 2021-06-25 | 广东电网有限责任公司电力调度控制中心 | Transformer substation video monitoring system and protective box thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20140918 |
|
| EXPY | Termination of patent right or utility model |