CN209692740U - A kind of anti-interference input circuit of vehicle-mounted camera and car networking equipment - Google Patents
A kind of anti-interference input circuit of vehicle-mounted camera and car networking equipment Download PDFInfo
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- CN209692740U CN209692740U CN201920769282.XU CN201920769282U CN209692740U CN 209692740 U CN209692740 U CN 209692740U CN 201920769282 U CN201920769282 U CN 201920769282U CN 209692740 U CN209692740 U CN 209692740U
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Abstract
The utility model provides a kind of anti-interference input circuit of vehicle-mounted camera and car networking equipment, the anti-interference input circuit includes difference partial pressure mould group, first input end, second input terminal, first output end and second output terminal, difference partial pressure mould group is connected with first input end and the second input terminal respectively in its input side, difference partial pressure mould group is connected with the first output end and second output terminal respectively in its outlet side, wherein, it includes the resistance R1 being arranged in series between first input end and the first output end that difference, which divides mould group, the resistance R2 being arranged in series between the second input terminal and second output terminal, and it is arranged in parallel the resistance R3 between the first output end and second output terminal.Scheme provided by the utility model, has the advantages that strong antijamming capability, automobile camera head can be allowed clearly to show, removes various water ripples, the interference such as striped.The arrangement difficulty for reducing vehicle body harness simultaneously facilitates vehicle to use inexpensive harness.
Description
Technical field
The utility model relates to vehicle network technology field, more particularly to a kind of anti-interference input circuit of vehicle-mounted camera and
Car networking equipment.
Background technique
In today that automotive electronic technology and security and guard technology develop rapidly, vehicle-mounted camera is indispensable at traffic safety
Hardware.Vehicle-mounted backup camera is a kind of automobile camera head for being mounted on the tailstock, can be total with the display screen of car installation
With composition complete set reverse image system, with reversing when can see vehicle after real time video image, at this moment, due to vehicle
It carries camera and is mounted on tail part, it is distant with a distance from display screen, if body harness lays unreasonable or vehicle body
Beam shield performance is bad, and just easily there is a situation where reversing images to be disturbed, and it is each water ripples, striped, snow etc. occur
Kind interference, influences user experience.
Utility model content
In view of the above problems, the utility model provide a kind of anti-interference input circuit of vehicle-mounted camera and car networking equipment with
Overcome the above problem or at least is partially solved above-mentioned technical problem.
According to the one aspect of the utility model, a kind of anti-interference input circuit of vehicle-mounted camera is provided, feature exists
In the anti-interference input circuit includes difference partial pressure mould group, first input end, the second input terminal, the first output end and second
Output end；
The difference partial pressure mould group is connected with the first input end and the second input terminal respectively in its input side, receives
Composite Video Baseband Signal CVBS and shielding layer signal CVBS_GND from vehicle-mounted camera；The difference partial pressure mould group is at it
Outlet side is connected with first output end and second output terminal respectively, and output handles to obtain via difference partial pressure mould group
Difference video signal CVBS+ and CVBS-；Wherein, the difference partial pressure mould group includes:
The resistance R1 being arranged in series between the first input end and the first output end；
The resistance R2 being arranged in series between second input terminal and second output terminal；And
The resistance R3 being arranged in parallel between first output end and second output terminal.
Optionally, the anti-interference input circuit further includes phasmajector D1 and capacitor C1；Wherein
One end of the phasmajector D1 is connected with the first input end, other end ground connection；
One end of the capacitor C1 is connected with second input terminal, other end ground connection.
Optionally, the anti-interference input circuit further includes capacitor C2, capacitor C3；
The capacitor C2 is arranged in series between the connecting node of described resistance R1, R3 and first output end；
The capacitor C3 is arranged in series between the connecting node and the second output terminal of described resistance R2, R3.
Optionally, the impedance of the resistance R1 is equal to the impedance of the resistance R2, the resistance R1, resistance R2 and resistance R3
The sum of impedance be 75 ohm.
According to the other side of the utility model, a kind of car networking equipment, including car networking apparatus body are additionally provided
And above-mentioned any anti-interference input circuit.
The utility model embodiment provides a kind of anti-interference input circuit of vehicle-mounted camera, the anti-interference input circuit packet
Difference partial pressure mould group, first input end, the second input terminal, the first output end and second output terminal are included, wherein difference divides mould group
It is connected respectively with first input end and the second input terminal in its input side, for receiving the composite video from vehicle-mounted camera
Broadcast singal CVBS and shielding layer signal CVBS_GND, difference divide mould group its outlet side respectively with the first output end and second
Output end is connected, for exporting the difference video signal CVBS+ and CVBS- that handle via difference partial pressure mould group.Into one
Step ground, it includes the resistance R1 being arranged in series between first input end and the first output end that difference, which divides mould group, is arranged in series in
Resistance R2 between second input terminal and second output terminal, and be arranged in parallel between the first output end and second output terminal
Resistance R3.The anti-interference input circuit of vehicle-mounted camera provided by the utility model has the advantages that strong antijamming capability, can allow vapour
Vehicle camera is clearly shown, removes the various interference such as various water ripples, striped, while can also reduce the cloth of vehicle body harness
Difficulty is set, vehicle is facilitated to use inexpensive harness.
Based on the embodiment of the utility model, differential signal can be converted by the single-ended signal of camera, filter out camera shooting
The interference signal carried on head harness, does not need to increase additional filter and differential amplifier circuit, can be by camera harness
On by various interference filterings or balance out, to reach more outstanding display picture, effect low in cost is good.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and being implemented in accordance with the contents of the specification, and in order to allow above and other purpose, feature of the utility model
It can be more clearly understood with advantage, it is special below to lift specific embodiment of the present utility model.
According to the accompanying drawings to the detailed description of the utility model specific embodiment, those skilled in the art will be more
Add the above-mentioned and other purposes, advantages and features of clear the utility model.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as practical to this
Novel limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the anti-interference input circuit schematic diagram of vehicle-mounted camera according to the utility model one embodiment；
Fig. 2 is the vehicle net equipment schematic diagram according to the utility model one embodiment.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
It should be noted that the feature in the utility model embodiment and preferred embodiment can be under the premise of not conflicting
It is combined with each other.
According to the one aspect of the utility model, it is anti-interference defeated that the utility model embodiment provides a kind of vehicle-mounted camera
Entering circuit, Fig. 1 is the anti-interference input circuit schematic diagram of vehicle-mounted camera according to the utility model one embodiment, referring to Fig. 1,
Anti-interference input circuit includes difference partial pressure mould group U, first input end, the second input terminal, the first output end and second output terminal.
In the utility model embodiment, difference divides mould group U, and in its input side, (difference shown in fig. 1 divides mould group U's
Left side) it is connected respectively with first input end and the second input terminal, and come from via first input end and the reception of the second input terminal
The Composite Video Baseband Signal CVBS and shielding layer signal CVBS_GND of vehicle-mounted camera, and difference partial pressure mould group U is in its output
Side (left side of difference partial pressure mould group U shown in fig. 1) is then connected with the first output end and second output terminal respectively, and then exports
The difference video signal CVBS+ and CVBS- handled via difference partial pressure mould group U.
Here difference video signal CVBS+ and CVBS- can be used as the input signal of rear class display driver chip, via
The differential input end of rear class display chip receives difference video signal CVBS+ and CVBS- and carries out subsequent processing, to show picture
Face.
With continued reference to Fig. 1, the difference partial pressure mould group U in the utility model embodiment be can specifically include: be arranged in series in
Resistance R1 between first input end and the first output end；The resistance being arranged in series between the second input terminal and second output terminal
R2；And it is arranged in parallel the resistance R3 between the first output end and second output terminal.
The utility model embodiment provides a kind of anti-interference input circuit of vehicle-mounted camera, the anti-interference input circuit packet
Difference partial pressure mould group, first input end, the second input terminal, the first output end and second output terminal are included, wherein difference divides mould group
It is connected respectively with first input end and the second input terminal in its input side, for receiving the composite video from vehicle-mounted camera
Broadcast singal CVBS and shielding layer signal CVBS_GND, difference divide mould group its outlet side respectively with the first output end and second
Output end is connected, for exporting the difference video signal CVBS+ and CVBS- that handle via difference partial pressure mould group.Into one
Step ground, it includes the resistance R1 being arranged in series between first input end and the first output end that difference, which divides mould group, is arranged in series in
Resistance R2 between second input terminal and second output terminal, and be arranged in parallel between the first output end and second output terminal
Resistance R3.The anti-interference input circuit of vehicle-mounted camera provided by the utility model has the advantages that strong antijamming capability, can allow vapour
Vehicle camera is clearly shown, removes the various interference such as various water ripples, striped, while can also reduce the cloth of vehicle body harness
Difficulty is set, vehicle is facilitated to use inexpensive harness.
Based on the embodiment of the utility model, differential signal can be converted by the single-ended signal of camera, filter out camera shooting
The interference signal carried on head harness, does not need to increase additional filter and differential amplifier circuit, can be by camera harness
On by various interference filterings or balance out, to reach more outstanding display picture, effect low in cost is good.
Mould group U is divided about above-mentioned difference, in one preferred embodiment of the utility model, the impedance of resistance R1 is equal to resistance
The impedance of R2, the sum of resistance R1, the impedance of resistance R2 and resistance R3 are 75 ohm.For example, 18 ohm of R1 value, 18 Europe of R2 value
Nurse, 39 ohm of R3 value, when vehicle-mounted camera has been sent to the CVBS signal and its shielded layer CVBS_GND of car networking equipment
After signal, difference divides the differential signal that CVBS signal partial pressure is 39 ohm by mould group.This preferred embodiment selects impedance identical
Resistance R1, resistance R2, and set resistance R1, the sum of impedance of resistance R2 and resistance R3 are equal to 75 ohm, anti-interference to carry out
Input circuit design, thus, it is possible to export relatively good differential signal, can show that more outstanding display so as to subsequent
Picture promotes user experience.
It is understood that actual circuit design when, the sum of impedance of resistance R1, R2, R3 can less than 75 ohm,
75 ohm can be greater than, set with specific reference to demand.
With continued reference to Fig. 1, in the preferred embodiment in the utility model, the anti-interference input circuit of vehicle-mounted camera can also be wrapped
Phasmajector D1 and capacitor C1 are included, wherein one end of phasmajector D1 is connected with first input end, and the other end is then grounded.Capacitor
One end of C1 be then to be connected with the second input terminal, the other end ground connection.In the utility model embodiment, vehicle-mounted camera is anti-dry
It disturbs and is additionally arranged phasmajector and capacitor in input circuit.Based on the scheme that this preferred embodiment provides, camera can be protected
It external electrostatic interference and filters out camera and is conducted through the DM EMIs such as the power supply disturbance come, further increase the anti-dry of circuit
Disturb ability.
Capacitor C1 is primarily used to filter out camera and is conducted through the DM EMIs such as the power supply disturbance come, and 1uF/ can be selected
The capacitor C1 of 25V.
It should be noted that in practical applications, suitable capacitor can be selected as needed into anti-interference input circuit
Design, the utility model is not specifically limited the capacitor specifications parameter of selection.
In order to realize better anti-static effect, in an embodiment of the present invention, Transient Suppression Diode can choose
(phasmajector D1 as shown in Figure 1) carries out antistatic design.Transient Suppression Diode is a kind of overvoltage protector of votage limit type
Part can be limited in excessively high voltage in one safe range at a terrific speed, to play the role of protection circuit below.
With continued reference to Fig. 1, in one preferred embodiment of the utility model, the anti-interference input circuit of vehicle-mounted camera can be with
Including capacitor C2, capacitor C3.In the preferred embodiment, capacitor C2 be arranged in series in the tie point of resistance R2, R3 in
Between first output end, capacitor C3 is then arranged in series between the tie point and second output terminal of resistance R2, R3.By capacitor
C2, C3 are connected in difference partial pressure mould group, can be used to isolated DC component, and then export more stable differential signal, to incite somebody to action
It is input to rear class display driver chip, and so as to reach more outstanding display picture, effect low in cost is good.
In the anti-interference input circuit design of progress vehicle-mounted camera, optionally, capacitor C2 is 0.1uF/50V, capacitor
Device C3 is 0.1uF/50V.
It should be noted that in practical applications, suitable capacitor can be selected to carry out as needed above-mentioned anti-interference defeated
Enter the design of circuit.The utility model is not specifically limited the capacitor specifications parameter of selection.
According to the other side of the utility model, a kind of car networking equipment is additionally provided.Fig. 2 is according to the utility model
The car networking equipment schematic diagram of one embodiment, as shown in Fig. 2, vehicle net equipment 100 include car networking apparatus body 101 and
The anti-interference input circuit 102 of the vehicle-mounted camera of any of the above-described embodiment.
The utility model embodiment provides a kind of anti-interference input circuit of vehicle-mounted camera, the anti-interference input circuit packet
Difference partial pressure mould group, first input end, the second input terminal, the first output end and second output terminal are included, wherein difference divides mould group
It is connected respectively with first input end and the second input terminal in its input side, for receiving the composite video from vehicle-mounted camera
Broadcast singal CVBS and shielding layer signal CVBS_GND, difference divide mould group its outlet side respectively with the first output end and second
Output end is connected, for exporting the difference video signal CVBS+ and CVBS- that handle via difference partial pressure mould group.Into one
Step ground, it includes the resistance R1 being arranged in series between first input end and the first output end that difference, which divides mould group, is arranged in series in
Resistance R2 between second input terminal and second output terminal, and be arranged in parallel between the first output end and second output terminal
Resistance R3.The anti-interference input circuit of vehicle-mounted camera provided by the utility model has the advantages that strong antijamming capability, can allow vapour
Vehicle camera is clearly shown, removes the various interference such as various water ripples, striped, while can also reduce the cloth of vehicle body harness
Difficulty is set, vehicle is facilitated to use inexpensive harness.
Based on the embodiment of the utility model, differential signal can be converted by the single-ended signal of camera, filter out camera shooting
The DM EMI signal and common mode interference signal carried on head harness.It does not need to increase additional filter and differential amplification electricity
Road by various interference filterings or will balance out on camera harness, thus reach more outstanding display picture, it is at low cost
Lian Xiaoguo is good.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the utility model
Embodiment can be practiced without these specific details.In some instances, be not been shown in detail well known method,
Structure and technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more in each utility model aspect
A, in the description above to the exemplary embodiment of the utility model, each feature of the utility model is divided together sometimes
Group is into single embodiment, figure or descriptions thereof.However, the method for the disclosure should not be construed to reflect following meaning
Figure: the requires of the utility model features more more than feature expressly recited in each claim i.e. claimed.
More precisely, as reflected in the following claims, it is in terms of utility model single less than disclosed above
All features of embodiment.Therefore, it then follows thus claims of specific embodiment are expressly incorporated in the specific embodiment party
Formula, wherein separate embodiments of each claim as the utility model itself.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is practical new in this
Within the scope of type and form different embodiments.For example, in detail in the claims, embodiment claimed it is any
One of can in any combination mode come using.
The utility model is limited it should be noted that above-described embodiment illustrates rather than the utility model,
And those skilled in the art can be designed alternative embodiment without departing from the scope of the appended claims.In right
In it is required that, any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" is not arranged
Except there are element or steps not listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of more
A such element.
So far, although those skilled in the art will appreciate that the more of the utility model have been shown and described in detail herein
A exemplary embodiment still, still can be according to the utility model public affairs in the case where not departing from the spirit and scope of the utility model
The content opened directly determines or derives many other variations or modifications for meeting the utility model principle.Therefore, this is practical new
The range of type is understood that and regards as to cover all such other variations or modifications.
Claims (5)
1. a kind of anti-interference input circuit of vehicle-mounted camera, which is characterized in that the anti-interference input circuit includes difference partial pressure
Mould group, first input end, the second input terminal, the first output end and second output terminal；
The difference partial pressure mould group is connected with the first input end and the second input terminal respectively in its input side, and reception comes from
The Composite Video Baseband Signal CVBS and shielding layer signal CVBS_GND of vehicle-mounted camera；The difference partial pressure mould group is in its output
Side is connected with first output end and second output terminal respectively, the difference that output is handled via difference partial pressure mould group
Sub-video signal CVBS+ and CVBS-；Wherein, the difference partial pressure mould group includes:
The resistance R1 being arranged in series between the first input end and the first output end；
The resistance R2 being arranged in series between second input terminal and second output terminal；And
The resistance R3 being arranged in parallel between first output end and second output terminal.
2. anti-interference input circuit according to claim 1, which is characterized in that the anti-interference input circuit further includes quiet
Fulgurite D1 and capacitor C1；Wherein
One end of the phasmajector D1 is connected with the first input end, other end ground connection；
One end of the capacitor C1 is connected with second input terminal, other end ground connection.
3. anti-interference input circuit according to claim 1, which is characterized in that the anti-interference input circuit further includes electricity
Container C2, capacitor C3；
The capacitor C2 is arranged in series between the connecting node of described resistance R1, R3 and first output end；
The capacitor C3 is arranged in series between the connecting node and the second output terminal of described resistance R2, R3.
4. anti-interference input circuit according to claim 1, which is characterized in that the impedance of the resistance R1 is equal to the electricity
The impedance of R2 is hindered, the sum of the resistance R1, the impedance of resistance R2 and resistance R3 are 75 ohm.
5. a kind of car networking equipment, which is characterized in that described in any item including car networking apparatus body and claim 1-4
Anti-interference input circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920769282.XU CN209692740U (en) | 2019-05-24 | 2019-05-24 | A kind of anti-interference input circuit of vehicle-mounted camera and car networking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920769282.XU CN209692740U (en) | 2019-05-24 | 2019-05-24 | A kind of anti-interference input circuit of vehicle-mounted camera and car networking equipment |
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| Publication Number | Publication Date |
|---|---|
| CN209692740U true CN209692740U (en) | 2019-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920769282.XU Active CN209692740U (en) | 2019-05-24 | 2019-05-24 | A kind of anti-interference input circuit of vehicle-mounted camera and car networking equipment |
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| Country | Link |
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| CN (1) | CN209692740U (en) |
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- 2019-05-24 CN CN201920769282.XU patent/CN209692740U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20220328 Address after: 430051 No. b1336, chuanggu startup area, taizihu cultural Digital Creative Industry Park, No. 18, Shenlong Avenue, Wuhan Economic and Technological Development Zone, Wuhan, Hubei Province Patentee after: Yikatong (Hubei) Technology Co.,Ltd. Address before: No.c101, chuanggu start up area, taizihu cultural Digital Industrial Park, No.18 Shenlong Avenue, Wuhan Economic Development Zone, Hubei Province Patentee before: HUBEI ECARX TECHNOLOGY Co.,Ltd. |
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