CN208046229U - Surge protector for monitoring system - Google Patents
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- CN208046229U CN208046229U CN201820506887.5U CN201820506887U CN208046229U CN 208046229 U CN208046229 U CN 208046229U CN 201820506887 U CN201820506887 U CN 201820506887U CN 208046229 U CN208046229 U CN 208046229U
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Abstract
The utility model is related to circuit protection technical fields; the technical issues of influence that voltage to solve inductive lightning electric current, overvoltage and big ups and downs works to safety defense monitoring system; provide a kind of Surge Protector for monitoring system; wherein; monitoring system includes image pickup part; image pickup part includes power end, video end and control terminal, and Surge Protector includes：The third protection module of first protection module of corresponding power end setting, the second protection module and corresponding control terminal setting of corresponding video end setting; wherein; first protection module includes differential mode protection element and common mode protection element, and the second protection module and third protection module respectively include dual-electrode protecting circuit.The utility model can effectively prevent inductive lightning electric current, overvoltage and voltage of big ups and downs etc. to impact the work of monitoring system; effective protection monitoring system is from damage; the safety and stability and service life of monitoring system are improved, and convenient for batch production and configuration.
Description
Technical field
The utility model is related to circuit protection technical fields, and in particular to a kind of Surge Protector for monitoring system.
Background technology
In thundery sky or unstable power supply system, it may appear that inductive lightning electric current invades or the phenomenon that voltage fluctuation,
The electronic monitoring equipment of safety defense monitoring system may be damaged.Therefore, inductive lightning electric current, overvoltage and play how to be prevented
The influence that the voltage of strong fluctuation works to monitoring system ensures the normal work of monitoring system, is that urgent need in the art solves
One technical problem.
Utility model content
The utility model is to solve how to prevent inductive lightning electric current, overvoltage and the voltage of big ups and downs to safety monitoring
The influence of system work, the technical issues of ensureing the normal work of monitoring system, provides a kind of surge for monitoring system
Protector.
The technical solution adopted in the utility model is as follows：
A kind of Surge Protector for monitoring system, the monitoring system includes image pickup part, and the image pickup part includes electricity
Source, video end and control terminal, the Surge Protector include：The first protection module, the correspondence of the corresponding power end setting
The third protection module of second protection module of the video end setting and the corresponding control terminal setting, wherein described first
Protection module includes differential mode protection element and common mode protection element, and second protection module and the third protection module are distinguished
Including dual-electrode protecting circuit.
First protection module includes：First fuse, one end of the first fuse is as first protection
The first input end of module is connected to power firestreak end；First inductance, one end and the first fuse of first inductance
The other end be connected, the first output end of the other end of first inductance as first protection module；First diode,
Second input terminal of the anode tap of first diode as first protection module, is connected to zero-power line end；Second
Fuse, one end of the second fuse are connected with the cathode terminal of first diode；Second inductance, second inductance
One end be connected with the other end of the second fuse, the other end of second inductance is as first protection module
Second output terminal；One end of third fuse, the third fuse is connected with one end of the first fuse；First is pressure-sensitive
Resistance, one end of first varistor are connected with the other end of the third fuse, first varistor it is another
One end is connected with the cathode terminal of first diode, wherein first inductance, second inductance and described first pressure-sensitive
Resistance is as the differential mode protection element, to realize that the differential mode surge between the power firestreak end and the zero line side is protected
Shield.
First protection module further includes：Second varistor, one end of second varistor and described first
The other end of fuse is connected, the other end ground connection of second varistor；Third varistor, the third varistor
One end be connected with the other end of the second fuse, the other end of third varistor ground connection, wherein described second
Varistor and the third varistor as the common mode protection element, respectively to realize the power firestreak end with ground
Between, the common mode surge protection between the zero-power line end and ground.
First protection module further includes：First divider resistance, one end and the third of first divider resistance
The other end of fuse is connected；Light emitting diode, the other end of the anode of the light emitting diode and first divider resistance
It is connected, the cathode of the light emitting diode is connected to the zero-power line end, and the light emitting diode is used to indicate power supply status.
Second protection module includes：One or three pole gas-discharge tube, the first of the one or the three pole gas-discharge tube
First input end of the pole as second protection module, is connected to the first end of video interface, and the one or the three pole gas is put
Second input terminal of second pole of fulgurite as second protection module, is connected to the second end of video interface, and described first
The third pole of three pole gas-discharge tubes is grounded；First rectification input terminal of the first rectification unit, first rectification unit passes through
First resistor is connected to the first pole of the one or the three pole gas-discharge tube, the second rectification input terminal of first rectification unit
The second pole of the one or the three pole gas-discharge tube is connected to by second resistance；First Transient Suppression Diode, described first
One end of Transient Suppression Diode is connected with the first rectification output end of first rectification unit, and first transient state inhibits two
The other end of pole pipe is connected with the second rectification output end of first rectification unit, and the two of first Transient Suppression Diode
Hold the first output end and second output terminal respectively as second protection module, wherein the one or the three pole gas discharge
Pipe and first Transient Suppression Diode are respectively realizing the first order surge protection and second level surge of the video end
Protection.
The video interface is BNC (Bayonet Nut Connector, bayonet nut connector) interface, the video
The first end of interface is the core wire end of the bnc interface, and the second end of the video interface is the rubber-insulated wire end of the bnc interface.
The third protection module includes：Two or three pole gas-discharge tube, the first of the two or the three pole gas-discharge tube
First input end of the pole as the third protection module is connected to first control signal line, the two or the three pole gas discharge
Second input terminal of second pole of pipe as the third protection module is connected to second control signal line, the two or three pole
The third pole of gas-discharge tube is grounded；First rectification input terminal of the second rectification unit, second rectification unit passes through third
Resistance is connected to the first pole of the two or the three pole gas-discharge tube, and the second rectification input terminal of second rectification unit passes through
4th resistance is connected to the second pole of the two or the three pole gas-discharge tube；Second Transient Suppression Diode, second transient state
One end of diode is inhibited to be connected with the first rectification output end of second rectification unit, second Transient Suppression Diode
The other end be connected with the second rectification output end of second rectification unit, the both ends of second Transient Suppression Diode point
Not as the first output end and second output terminal of the third protection module, wherein the two or the three pole gas-discharge tube and
Second Transient Suppression Diode is respectively realizing the first order surge protection and second level surge protection of the control terminal.
First rectification unit and second rectification unit include bridge rectifier chip.
The beneficial effects of the utility model：
The Surge Protector for monitoring system of the utility model passes through corresponding power end, video end and control respectively
End setting includes the second protection of the first protection module including dual-electrode protecting circuit of differential mode protection element and common mode protection element
Module and third protection module including dual-electrode protecting circuit, can effectively prevent inductive lightning electric current, overvoltage and big ups and downs
Voltage etc. the work of monitoring system is impacted, effective protection monitoring system improves the safety of monitoring system from damage
Property and stability and service life, and the Surge Protector is simple in structure, easy for installation, occupied space is smaller, cost is relatively low,
Convenient for producing in batches and configuring.
Description of the drawings
Fig. 1 is the block diagram of the Surge Protector for monitoring system of the utility model embodiment；
Fig. 2 is the circuit structure diagram of first protection module of the utility model one embodiment；
Fig. 3 is the circuit structure diagram of second protection module of the utility model one embodiment；
Fig. 4 is the circuit structure diagram of the third protection module of the utility model one embodiment.
In figure：1- Surge Protectors, the first protection modules of 10-, the second protection modules of 20-, 30- third protection modules,
100- image pickup parts, 110- power ends, 120- video ends, 130- control terminals.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The monitoring system of the utility model includes image pickup part, as shown in Figure 1, image pickup part 100 includes power end 110, video
End 120 and control terminal 130, wherein power end 110 for image pickup part to provide power supply, and control terminal 130 is carrying out image pickup part
Control, video end 120, and can be by its video interfaces by video signal transmission to host to acquire vision signal.
(dotted line frame indicates the equipment except the Surge Protector of the utility model in figure) as shown in Figure 1, the utility model
The Surge Protector 1 for monitoring system, including the first protection module 10, corresponding video end that corresponding power end 110 is arranged
The third protection module 30 that the second protection module 20 and corresponding control terminal 130 of 120 settings are arranged.Wherein, the first protection module
10 include differential mode protection element and common mode protection element, and the second protection module 20 and third protection module 30 respectively include two-stage guarantor
Protection circuit.
In one embodiment of the utility model, as shown in Fig. 2, the first protection module 10 include first fuse F1,
First inductance L1, the first diode D1, second fuse F2, the second inductance L2, third fuse F3 and the first varistor
VDR1.Wherein, first input end of the one end of first fuse F1 as the first protection module 10 is connected to power firestreak end L；
One end of first inductance L1 is connected with the other end of first fuse F1, and the other end of the first inductance L1 is as the first protection module
10 the first output end；Second input terminal of the anode tap of first diode D as the first protection module 10, is connected to power supply zero
Line end N；One end of second fuse F2 is connected with the cathode terminal of the first diode D；One end of second inductance L2 and the second fusing
The other end of device F2 is connected, the second output terminal of the other end of the second inductance L2 as the first protection module 10；Third fuse
One end of F3 is connected with one end of first fuse F1；The other end of one end and third fuse F3 of the first varistor VDR1
It is connected, the other end of the first varistor VDR1 is connected with the cathode terminal of the first diode D.
Wherein, the first inductance L1, the second inductance L2 and the first varistor VDR1 are as differential mode protection element, to realize
Difference mode surge protection between power firestreak end L and zero line side N.
As shown in Fig. 2, the first protection module 10 further includes the second varistor VDR2 and third varistor VDR3.Its
In, one end of the second varistor VDR2 is connected with the other end of first fuse F1, the other end of the second varistor VDR2
Ground connection；One end of third varistor VDR3 is connected with the other end of second fuse F2, and third varistor VDR3's is another
End ground connection.
Wherein, the second varistor VDR2 and third varistor VDR3 be as common mode protection element, respectively realizing
Common mode surge protection between power firestreak end L and ground GND, between zero-power line end N and ground GND.
In general, the first input end and the second input terminal of the first protection module 10 are connected respectively to the power supply of power end
Zero line L, zero-power line end N, the first output end and second output terminal of the first protection module 10 are as equipment side power interface
L ', N ', to be connected to electrical equipment.Pass through power firestreak end L, first fuse F1, the first inductance L1, the second electricity as a result,
Access that sense L2, second fuse F2, zero-power line end N are constituted and by power firestreak end L, third fuse F3, first
The access that varistor VDR1, zero-power line end N are constituted can effectively inhibit differential mode surge, realize difference mode surge protection；Pass through
Power firestreak end L, first fuse F1, the second varistor VDR2, the accesses that are constituted of GND and by zero-power line end N,
First diode D, second fuse F2, third varistor VDR3, the accesses that are constituted of GND, can effective suppression common mode wave
It gushes, realizes common mode surge protection.
Further, as shown in Fig. 2, the first protection module 10 may also include the first divider resistance R and light emitting diode
One end of LED, the first divider resistance R are connected with the other end of third fuse F3, the anode of Light-emitting diode LED and first point
The other end of piezoresistance R is connected, and the cathode of Light-emitting diode LED is connected to zero-power line end N, and Light-emitting diode LED can be used for
Indicate power supply status.Specifically, when power supply is in running order, power firestreak end L, third fuse F3, the first partial pressure electricity
R, Light-emitting diode LED composition access are hindered, to which Light-emitting diode LED is lit.
In one embodiment of the utility model, as shown in figure 3, the second protection module 20 is put including the one or three pole gas
Fulgurite GDT1, the first rectification unit U1 and the first Transient Suppression Diode TVS1.Wherein, the one or three pole gas-discharge tube GDT1
First input end of first pole as the second protection module 20, is connected to the first end of video interface, the one or three pole gas discharge
Second input terminal of the second pole of pipe GDT1 as the second protection module 20, is connected to the second end of video interface, the one or three pole
The third pole of gas-discharge tube GDT1 is grounded；The first rectification input terminal AC1 of first rectification unit U1 is connected by first resistor R1
It is connected to the first pole of the one or three pole gas-discharge tube GDT1, the second rectification input terminal AC2 of the first rectification unit U1 passes through second
Resistance R2 is connected to the second pole of the one or three pole gas-discharge tube GDT2；One end and first of first Transient Suppression Diode TVS1
The first rectification output end V+ of rectification unit U1 is connected, the other end and the first rectification unit of the first Transient Suppression Diode TVS
The second rectification output end V- of U1 is connected, and the both ends of the first Transient Suppression Diode TVS are respectively as the second protection module 20
First output end and second output terminal.
In a specific embodiment of the utility model, video interface is bnc interface, and the first end of video interface is
The core wire end of bnc interface, the second end of video interface are the rubber-insulated wire end of bnc interface.
In general, the first input end and the second input terminal of the second protection module 20 are connected respectively to bnc interface IN's
Core wire end and rubber-insulated wire end, the first output end of the second protection module 20 and second output terminal as new bnc interface OUT, to
It is connected to host.The one or three pole gas-discharge tube GDT1 and the first Transient Suppression Diode TVS1 regard to realize respectively as a result,
The first order surge protection and second level surge protection at frequency end.
In one embodiment of the utility model, as shown in figure 4, third protection module 30 is put including the two or three pole gas
Fulgurite GDT2, the second rectification unit U2 and the second Transient Suppression Diode TVS2.Wherein, the two or three pole gas-discharge tube GDT2
First input end of first pole as third protection module 30 is connected to first control signal line a, the two or three pole gas-discharge tube
Second input terminal of the second pole of GDT2 as third protection module 30, is connected to second control signal line b, the two or three pole gas
The third pole of discharge tube GDT2 is grounded；The first rectification input terminal AC1 of second rectification unit U2 is connected to by 3rd resistor R3
Second rectification input terminal AC2 of the first pole of the two or three pole gas-discharge tube GDT2, the second rectification unit U2 passes through the 4th resistance
R4 is connected to the second pole of the two or three pole gas-discharge tube GDT2；One end of second Transient Suppression Diode TVS2 and the second rectification
The first rectification output end V+ of unit U2 is connected, the other end of the second Transient Suppression Diode TVS2 and the second rectification unit U2's
Second rectification output end V- is connected, and the both ends of the second Transient Suppression Diode TVS2 are respectively as the first of third protection module 30
Output end and second output terminal.
In general, the first input end of third protection module 30 and the second input terminal are connected respectively to two control signals
Line a and b, to receive control signal, the first output end and second output terminal of third protection module 30 be connected respectively to it is above-mentioned
Two control signal wires a and b corresponding new two control signal wires a ' and b ', new two control signal wires a ' and b ' are used
To connect controlled device.As a result, the two or three pole gas-discharge tube GDT2 and the second Transient Suppression Diode TVS2 respectively to
Realize the first order surge protection and second level surge protection of control terminal.
In a specific embodiment of the utility model, the first rectification unit U1 and the second rectification unit U2 include bridge
Formula rectification chip, first fuse F1, second fuse F2 and third fuse F3 can be electric fuse, the first varistor
VDR1, the second varistor VDR2 and third varistor VDR3 can be Zinc-oxide piezoresistor.
In conclusion the Surge Protector according to the present utility model for monitoring system, by corresponding power end respectively,
Video end and control terminal setting include the first protection module including the two class protection electricity of differential mode protection element and common mode protection element
Second protection module on road and the third protection module including dual-electrode protecting circuit can effectively prevent inductive lightning electric current, excessively electric
Pressure and the voltage etc. of big ups and downs impact the work of monitoring system, and effective protection monitoring system improves prison from damage
The safety and stability and service life of control system, and the Surge Protector is simple in structure, easy for installation, occupied space compared with
It is small, cost is relatively low, convenient for batch production and configuration.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (8)
1. a kind of Surge Protector for monitoring system, the monitoring system includes image pickup part, and the image pickup part includes power supply
End, video end and control terminal, which is characterized in that the Surge Protector includes：First protection of the corresponding power end setting
The third protection module of module, the second protection module and the corresponding control terminal setting of the corresponding video end setting, wherein
First protection module includes differential mode protection element and common mode protection element, and second protection module and the third are protected
Module respectively includes dual-electrode protecting circuit.
2. the Surge Protector according to claim 1 for monitoring system, which is characterized in that first protection module
Including：
First fuse, the first input end of one end of the first fuse as first protection module, is connected to electricity
Source zero line；
One end of first inductance, first inductance is connected with the other end of the first fuse, first inductance it is another
First output end of the one end as first protection module；
First diode, the second input terminal of the anode tap of first diode as first protection module, is connected to
Zero-power line end；
Second fuse, one end of the second fuse are connected with the cathode terminal of first diode；
One end of second inductance, second inductance is connected with the other end of the second fuse, second inductance it is another
Second output terminal of the one end as first protection module；
One end of third fuse, the third fuse is connected with one end of the first fuse；
First varistor, one end of first varistor are connected with the other end of the third fuse, and described first
The other end of varistor is connected with the cathode terminal of first diode,
Wherein, first inductance, second inductance and first varistor be as the differential mode protection element, to
Realize the difference mode surge protection between the power firestreak end and the zero line side.
3. the Surge Protector according to claim 2 for monitoring system, which is characterized in that first protection module
Further include：
One end of second varistor, second varistor is connected with the other end of the first fuse, and described second
The other end of varistor is grounded；
One end of third varistor, the third varistor is connected with the other end of the second fuse, the third
The other end of varistor is grounded,
Wherein, second varistor and the third varistor be as the common mode protection element, respectively realizing
Common mode surge protection between the power firestreak end and ground, between the zero-power line end and ground.
4. the Surge Protector according to claim 3 for monitoring system, which is characterized in that first protection module
Further include：
First divider resistance, one end of first divider resistance are connected with the other end of the third fuse；
Light emitting diode, the anode of the light emitting diode are connected with the other end of first divider resistance, and described luminous two
The cathode of pole pipe is connected to the zero-power line end, and the light emitting diode is used to indicate power supply status.
5. the Surge Protector according to claim 1 for monitoring system, which is characterized in that second protection module
Including：
One or three pole gas-discharge tube, the first pole of the one or the three pole gas-discharge tube as second protection module
One input terminal, is connected to the first end of video interface, and the second pole of the one or the three pole gas-discharge tube is protected as described second
The second input terminal for protecting module is connected to the second end of video interface, the third pole ground connection of the one or the three pole gas-discharge tube；
First rectification input terminal of the first rectification unit, first rectification unit is connected to the described 1st by first resistor
Second rectification input terminal of the first pole of pole gas-discharge tube, first rectification unit is connected to described by second resistance
Second pole of one or three pole gas-discharge tubes；
First Transient Suppression Diode, the first of one end of first Transient Suppression Diode and first rectification unit are whole
It flows output end to be connected, the second rectification output end of the other end of first Transient Suppression Diode and first rectification unit
It is connected, the both ends of first Transient Suppression Diode are defeated respectively as the first output end of second protection module and second
Outlet,
Wherein, the one or the three pole gas-discharge tube and first Transient Suppression Diode are respectively realizing the video end
First order surge protection and second level surge protection.
6. the Surge Protector according to claim 5 for monitoring system, which is characterized in that the video interface is
Bnc interface, the first end of the video interface are the core wire end of the bnc interface, and the second end of the video interface is described
The rubber-insulated wire end of bnc interface.
7. the Surge Protector according to claim 5 for monitoring system, which is characterized in that the third protection module
Including：
Two or three pole gas-discharge tube, the first pole of the two or the three pole gas-discharge tube as the third protection module
One input terminal, is connected to first control signal line, and the second pole of the two or the three pole gas-discharge tube is protected as the third
Second input terminal of module is connected to second control signal line, the third pole ground connection of the two or the three pole gas-discharge tube；
First rectification input terminal of the second rectification unit, second rectification unit is connected to the described 2nd 3 by 3rd resistor
Second rectification input terminal of the first pole of pole gas-discharge tube, second rectification unit is connected to described by the 4th resistance
Second pole of two or three pole gas-discharge tubes；
Second Transient Suppression Diode, the first of one end of second Transient Suppression Diode and second rectification unit are whole
It flows output end to be connected, the second rectification output end of the other end of second Transient Suppression Diode and second rectification unit
It is connected, the both ends of second Transient Suppression Diode are defeated respectively as the first output end of the third protection module and second
Outlet,
Wherein, the two or the three pole gas-discharge tube and second Transient Suppression Diode are respectively realizing the control terminal
First order surge protection and second level surge protection.
8. the Surge Protector according to claim 7 for monitoring system, which is characterized in that first rectification unit
It include bridge rectifier chip with second rectification unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820506887.5U CN208046229U (en) | 2018-04-10 | 2018-04-10 | Surge protector for monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820506887.5U CN208046229U (en) | 2018-04-10 | 2018-04-10 | Surge protector for monitoring system |
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| Publication Number | Publication Date |
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| CN208046229U true CN208046229U (en) | 2018-11-02 |
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ID=63944345
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552556A (en) * | 2022-01-24 | 2022-05-27 | 华为数字能源技术有限公司 | Lightning protection device and power supply equipment |
-
2018
- 2018-04-10 CN CN201820506887.5U patent/CN208046229U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552556A (en) * | 2022-01-24 | 2022-05-27 | 华为数字能源技术有限公司 | Lightning protection device and power supply equipment |
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