CN202406194U - Lightning protection camera - Google Patents
Lightning protection camera Download PDFInfo
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- CN202406194U CN202406194U CN2012200184088U CN201220018408U CN202406194U CN 202406194 U CN202406194 U CN 202406194U CN 2012200184088 U CN2012200184088 U CN 2012200184088U CN 201220018408 U CN201220018408 U CN 201220018408U CN 202406194 U CN202406194 U CN 202406194U
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Abstract
The utility model discloses a lightning protection camera. The lightning protection camera comprises a power supply input circuit, a lamp control circuit, a lamp circuit, a video processing circuit, a video amplification circuit, a video output circuit, a power supply lightning protection circuit and a video lightning protection circuit; the lamp control circuit and the lamp circuit are connected to control the lamp circuit; the video processing circuit, the video amplification circuit and the video output circuit are sequentially connected; the power supply input circuit supplies power to the lamp control circuit and the video processing circuit simultaneously; the power supply lightning protection circuit is connected between the power supply input circuit and the video processing circuit; and one end of the video lightning protection circuit is connected with the power supply lightning protection circuit and is grounded, and the other end of the video lightning protection circuit is connected to connection nodes of the video amplification circuit and the video output circuit. The lightning protection camera is provided with the power supply lightning protection circuit and the video lightning protection circuit to achieve the double effects of lightning protection, and can resist lightning stroke transient voltage of thousands of kilovolts, and the camera can work normally after lightning stroke.
Description
Technical field
The utility model relates to camera head, relates more specifically to a kind of lightning protection camera that is applicable in the safety defense monitoring system.
Background technology
Existing safety defense monitoring system generally comprises and places indoor data storing device and monitor and place outdoor camera head.When thunderbolt takes place; To produce the lightning induction electric current, wherein a part of induced current flows to indoor, indoor data storing device because the protective action that the lightning protection plate can play lightning protection is installed; Another part induced current flows to outdoor equipment; And place outdoor camera head not possess the lightning protection effect usually, and can cause video circuit or power circuit to damage when running into thunderbolt or instantaneous pressure, cause video camera not have figure or other abnormal problems.
In order to solve above-mentioned thunderbolt problem, usual way is when project installation, outside existing camera head, to be equipped with video lightning protection device and lightning protection for power supply avoiding lightning strike accident, yet this mode can cause engineering cost to increase, and the project installation difficulty is big.
Given this, inventor's innovative design goes out the lower lightning protection camera of a kind of safe and reliable, construction install convenience and cost of manufacture to address the aforementioned drawbacks.
The utility model content
The purpose of the utility model provides a kind of safe and reliable, construction install convenience and the lower lightning protection camera of cost of manufacture.
To achieve these goals; The technical scheme of the utility model is: a kind of lightning protection camera is provided; It comprises power supply input circuit, lamp control circuit, circuit for lamp, video processing circuits, video amplifier circuit, video output circuit and power lightning protection circuit and video lightning protection circuit; Said lamp control circuit links to each other with said circuit for lamp to control said circuit for lamp; Said video processing circuits, video amplifier circuit and video output circuit link to each other successively, and said power supply input circuit is supplied power to said lamp control circuit and video processing circuits simultaneously, and said power lightning protection circuit is connected between said power supply input circuit and the video processing circuits; Said video lightning protection circuit one end links to each other and ground connection with said power lightning protection circuit, and the other end is connected on the connected node of said video amplifier circuit and video output circuit.
Its further technical scheme is: said power supply input circuit is a direct-flow input circuit; Said power lightning protection circuit comprises that inductance L 1, earthenware G1 and transient voltage suppress diode T1; Said inductance L 1 is connected between the output and video processing circuits of said direct-flow input circuit; Said earthenware G1 and transient voltage suppress input and the output that diode T1 is connected in parallel on circuit respectively; Said video lightning protection circuit comprises that transient voltage suppresses diode T2, and said transient voltage suppresses diode T2 one end and links to each other and ground connection with the output of said power lightning protection circuit, and the other end is connected on the connected node of said video amplifier circuit and video output circuit.
Its another further technical scheme is: said power supply input circuit is an ac input circuit; Said lightning protection camera also comprises current rectifying and wave filtering circuit and the motherboard power supply change-over circuit that links to each other with said current rectifying and wave filtering circuit; Said motherboard power supply change-over circuit links to each other with said video processing circuits; Said power lightning protection circuit is connected between said ac input circuit and the current rectifying and wave filtering circuit; Said video lightning protection circuit one end links to each other and ground connection with said current rectifying and wave filtering circuit, and the other end is connected on the connected node of said video amplifier circuit and video output circuit.
Preferably; Said power lightning protection circuit comprises that inductance L 1 and L2, earthenware G1 and G2 and transient voltage suppress diode T1, T2 and T3; Said video lightning protection circuit comprises that transient voltage suppresses diode T4, and wherein, series connection is connected on respectively in the two-way input of circuit said inductance L 1 with L2; After connecting each other, said earthenware G1 and G2 be connected in parallel on the input of circuit; Be connected in parallel on the output of circuit after said transient voltage inhibition diode T2 and the T3 series connection, the connected node of said earthenware G1 and G2 and transient voltage suppress the equal ground connection of connected node of diode T2 and T3, and said transient voltage suppresses the output that diode T1 is connected in parallel on circuit.
Compared with prior art; The utility model lightning protection camera is built-in with power lightning protection circuit and the dual lightning protection circuit of video lightning protection circuit; Through the test of professional test appearance, the utility model can be realized power lightning protection transient voltage value below 6KV, and video lightning protection transient voltage value (lightning surge test) is below 5KV; Guarantee that effectively camera head is in thunderbolt ability operate as normal later; Have than high safety reliability, use the utility model lightning protection camera can avoid external lightning protection device, construction install convenience and cost are lower.
Through following description and combine accompanying drawing, it is more clear that the utility model will become, and these accompanying drawings are used to explain the embodiment of the utility model.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model lightning protection camera first embodiment.
Fig. 2 is the structural representation of power lightning protection circuit in the lightning protection camera shown in Figure 1.
Fig. 3 is the structural representation of video lightning protection circuit in the lightning protection camera shown in Figure 1.
Fig. 4 is the schematic block circuit diagram of the utility model lightning protection camera second embodiment.
Fig. 5 is the structural representation of power lightning protection circuit in the lightning protection camera shown in Figure 4.
Fig. 6 is the structural representation of video lightning protection circuit in the lightning protection camera shown in Figure 4.
Each description of reference numerals is following among the figure:
The utility model first embodiment:
Direct-flow input circuit 11 lamp control circuits 121
Circuit for lamp 121 video processing circuitss 131
Power lightning protection circuit 14 video lightning protection circuits 15
The utility model second embodiment:
Lightning protection camera 20
Direct-flow input circuit 21 lamp control circuits 221
Circuit for lamp 221 video processing circuitss 231
Video amplifier circuit 232 video output circuits 233
Power lightning protection circuit 24 video lightning protection circuits 25
Current rectifying and wave filtering circuit 26 motherboard power supply change-over circuits 27
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the embodiment is carried out clear, intactly description, assembly label identical in the accompanying drawing is represented identical assembly.Obviously, below only be the utility model part embodiment with the embodiment that describes, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Referring to figs. 1 through Fig. 3, it has showed first embodiment of the utility model lightning protection camera.
Please with reference to Fig. 1; In the present embodiment; Said lightning protection camera 10 comprises direct-flow input circuit 11, lamp control circuit 121, circuit for lamp 122, video processing circuits 131, video amplifier circuit 132 and video output circuit 133; Said lamp control circuit 121 links to each other with said circuit for lamp 122 to control said circuit for lamp 122; Said video processing circuits 131, video amplifier circuit 132 and video output circuit 133 link to each other successively, and said direct-flow input circuit 11 is supplied power with video processing circuits 131 to said lamp control circuit 121 simultaneously.The concrete structure and the operation principle of foregoing circuit module all are well known to those skilled in the art, and are not described in detail in this.
In the present embodiment; Said lightning protection camera 10 also comprises power lightning protection circuit 14 and video lightning protection circuit 15; The input INPUT1 of said power lightning protection circuit 14 is connected with two outputs of said direct-flow input circuit 11 respectively with INPUT2; The output OUTPUT1 of said power lightning protection circuit 14 links to each other with lamp control circuit 121 and video processing circuits 131 simultaneously, and its output OUTPUT2 ground connection.Particularly; As shown in Figure 2; Said power lightning protection circuit 14 comprises that inductance L 1, earthenware G1 and transient voltage suppress diode (TVS pipe) T1; Said inductance L 1 is connected between the input INPUT1 and output INPUT2 of circuit, and said earthenware G1 is connected in parallel between the input INPUT1 and INPUT2 of circuit, and transient voltage inhibition diode T1 is connected in parallel between output OUTPUT1 and the OUTPUT2 (ground connection).As shown in Figure 3; Said video lightning protection circuit 15 comprises that transient voltage suppresses diode T2; The input INPUT3 that said transient voltage suppresses diode T2 links to each other with ground, and its output OUTPUT3 is connected on the connected node of video amplifier circuit 132 and video output circuit 133.
Based on the foregoing circuit structure, the operation principle when present embodiment lightning protection camera 10 adopts direct-flow input circuit is following:
For power lightning protection circuit 14, when thunder and lightning produced, voltage at first passed through inductance L 1; When voltage high during to TVS pipe T1 conducting, TVS pipe T1 start working and voltage is carried out clamped, for example voltage clamping to 18V; When on the inductance L 1 mutation current being arranged, can produce resistance voltage, when voltage is higher than earthenware G1 conducting; G1 starts working, and makes high electric current to ground, thereby has played the lightning protection effect.
For video lightning protection circuit 15, when thunder and lightning produces, at first go into to TVS pipe T2 through video output streams, when the thunderbolt transient voltage was higher than 6V, T2 started working, and voltage clamping to about the 6V, thereby play the lightning protection effect.
With reference to Fig. 4 to Fig. 6, it has showed second embodiment of the utility model lightning protection camera.
In the present embodiment; The motherboard power supply change-over circuit (motherboard power supply DC changes the DC circuit) 27 that said lightning protection camera 20 comprises ac input circuit 21, lamp control circuit 221, circuit for lamp 222, video processing circuits 231, video amplifier circuit 232, video output circuit 233, current rectifying and wave filtering circuit 26 and links to each other with said current rectifying and wave filtering circuit 26, said motherboard power supply change-over circuit 27 links to each other with video amplifier circuit 232 with said video processing circuits 231 simultaneously.The concrete structure and the operation principle of foregoing circuit module all are well known to those skilled in the art, and are not described in detail in this.
In the present embodiment; Said lightning protection camera 20 also comprises power lightning protection circuit 24 and video lightning protection circuit 25; The input INPUT1 of said power lightning protection circuit 24 is connected with two outputs of ac input circuit 21 respectively with INPUT2; Two output OUTPUT1 of said power lightning protection circuit 24 link to each other with two inputs of current rectifying and wave filtering circuit 26 respectively with OUTPUT2; And a wherein output of current rectifying and wave filtering circuit 26 links to each other with video processing circuits 231 with lamp control circuit 221, motherboard power supply DC commentaries on classics DC circuit 27 simultaneously, and its other end links to each other with video lightning protection circuit 25.Particularly; As shown in Figure 4; Said power lightning protection circuit comprises that inductance L 1 and L2, earthenware G1 and G2 and transient voltage suppress diode T1, T2 and T3; Said video lightning protection circuit 25 comprises that transient voltage suppresses diode T4; Wherein, said inductance L 1 is connected between the input INPUT1 and output OUTPUT1 of circuit, and inductance L 2 is connected between another input INPUT2 and another output OUTPUT2 of circuit; After connecting each other, said earthenware G1 and G2 be connected in parallel between the two input INPUT1 and INPUT2 of circuit; Said transient voltage suppresses to be connected in parallel between the two output OUTPUT1 and OUTPUT2 of circuit after diode T2 and the T3 series connection, and the connected node of said earthenware G1 and G2 and transient voltage suppress the equal ground connection of connected node of diode T2 and T3, and said transient voltage suppresses diode T1 and is connected in parallel between the two output OUTPUT1 and OUTPUT2 of circuit.As shown in Figure 5; Said video lightning protection circuit 25 comprises that transient voltage suppresses diode T4; The input INPUT3 that said transient voltage suppresses diode T4 links to each other with power supply ground with video ground, and its output OUTPUT3 is connected on the connected node of video amplifier circuit 232 and video output circuit 233.
Based on the foregoing circuit structure, the operation principle when present embodiment lightning protection camera 20 adopts ac input circuit is following:
For power lightning protection circuit 24, when thunder and lightning produced, voltage at first passed through inductance L 1 and L2; When voltage high during to TVS pipe T1, T2 and T3 conducting, TVS pipe T1, T2 and T3 start working and voltage is carried out clamped, the anti-common-mode voltage of T1 and T2 and T2 prevent differential mode voltage wherein; When on inductance L 1 and the L2 mutation current being arranged, can produce resistance voltage, when voltage is higher than earthenware G1 and G2 conducting; G1 and G2 start working, and make high electric current to ground, thereby have played the lightning protection effect.
For video lightning protection circuit 25, when thunder and lightning produces, at first go into to TVS pipe T4 through video output streams, when thunderbolt voltage was higher than 6V, T4 started working, and voltage clamping to about the 6V, thereby play the lightning protection effect.
As stated; The utility model lightning protection camera is built-in with power lightning protection circuit and the dual lightning protection circuit of video lightning protection circuit; Through professional test appearance test, the utility model can realize power lightning protection transient voltage value below 6KV/3KA, video lightning protection transient voltage value (surge test) is below 5KV; Guarantee that effectively camera head is in thunderbolt ability operate as normal later; Have higher high safety reliability, use the utility model lightning protection camera can avoid external lightning protection device, construction install convenience and cost are lower.
More than combine most preferred embodiment that the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to the essence of the utility model.
Claims (4)
1. lightning protection camera; Comprise power supply input circuit, lamp control circuit, circuit for lamp, video processing circuits, video amplifier circuit and video output circuit; Said lamp control circuit links to each other with said circuit for lamp to control said circuit for lamp; Said video processing circuits, video amplifier circuit and video output circuit link to each other successively; Said power supply input circuit is supplied power to said lamp control circuit and video processing circuits simultaneously, it is characterized in that: said lightning protection camera also comprises power lightning protection circuit and video lightning protection circuit, and said power lightning protection circuit is connected between said power supply input circuit and the video processing circuits; Said video lightning protection circuit one end links to each other and ground connection with said power lightning protection circuit, and the other end is connected on the connected node of said video amplifier circuit and video output circuit.
2. lightning protection camera as claimed in claim 1; It is characterized in that: said power supply input circuit is a direct-flow input circuit; Said power lightning protection circuit comprises that inductance L 1, earthenware G1 and transient voltage suppress diode T1; Said inductance L 1 is connected between the output and video processing circuits of said direct-flow input circuit; Said earthenware G1 and transient voltage suppress between the both positive and negative polarity that diode T1 is connected in parallel on circuit input end respectively and between the both positive and negative polarity of output; Said video lightning protection circuit comprises that transient voltage suppresses diode T2, and said transient voltage suppresses diode T2 one end and links to each other and ground connection with the output of said power lightning protection circuit, and the other end is connected on the connected node of said video amplifier circuit and video output circuit.
3. lightning protection camera as claimed in claim 1; It is characterized in that: said power supply input circuit is an ac input circuit; Said lightning protection camera also comprises current rectifying and wave filtering circuit and the motherboard power supply change-over circuit that links to each other with said current rectifying and wave filtering circuit; Said motherboard power supply change-over circuit links to each other with said video processing circuits simultaneously; Said power lightning protection circuit is connected between said ac input circuit and the current rectifying and wave filtering circuit, and said video lightning protection circuit one end links to each other and ground connection with said current rectifying and wave filtering circuit, and the other end is connected on the connected node of said video amplifier circuit and video output circuit.
4. lightning protection camera as claimed in claim 3; It is characterized in that: said power lightning protection circuit comprises that inductance L 1 and L2, earthenware G1 and G2 and transient voltage suppress diode T1, T2 and T3; Said video lightning protection circuit comprises that transient voltage suppresses diode T4; Wherein, Series connection is connected on respectively in the two-way input of circuit said inductance L 1 with L2, is connected in parallel on the input of circuit after said earthenware G1 and G2 connect each other, is connected in parallel on the output of circuit after said transient voltage inhibition diode T2 and the T3 series connection; The connected node of said earthenware G1 and G2 and transient voltage suppress the equal ground connection of connected node of diode T2 and T3, and said transient voltage suppresses the output that diode T1 is connected in parallel on circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200184088U CN202406194U (en) | 2012-01-16 | 2012-01-16 | Lightning protection camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200184088U CN202406194U (en) | 2012-01-16 | 2012-01-16 | Lightning protection camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202406194U true CN202406194U (en) | 2012-08-29 |
Family
ID=46703808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200184088U Expired - Fee Related CN202406194U (en) | 2012-01-16 | 2012-01-16 | Lightning protection camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202406194U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986858A (en) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | Lightning-protection mobile camera |
| CN103997594A (en) * | 2014-05-09 | 2014-08-20 | 广西南宁百兰斯科技开发有限公司 | Camera with lightning protection system |
-
2012
- 2012-01-16 CN CN2012200184088U patent/CN202406194U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986858A (en) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | Lightning-protection mobile camera |
| CN103997594A (en) * | 2014-05-09 | 2014-08-20 | 广西南宁百兰斯科技开发有限公司 | Camera with lightning protection system |
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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: 20120829 Termination date: 20150116 |
|
| EXPY | Termination of patent right or utility model |