CN110329181A - A kind of system of control multichannel CVBS image switching - Google Patents
A kind of system of control multichannel CVBS image switching Download PDFInfo
- Publication number
- CN110329181A CN110329181A CN201910596453.8A CN201910596453A CN110329181A CN 110329181 A CN110329181 A CN 110329181A CN 201910596453 A CN201910596453 A CN 201910596453A CN 110329181 A CN110329181 A CN 110329181A
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- CN
- China
- Prior art keywords
- control
- image
- right turn
- signal
- vehicle
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
Abstract
The present invention provides a kind of systems of control multichannel CVBS image switching, are related to automobile technical field.Control mian engine changeover is the vehicle of reverse image in activating automatically when having the function of detecting astern signal for being mounted on, to realize the extension of multipath video handoff functionality comprising: detection unit, for detecting the left/right turn signal and astern signal of vehicle；Controller, for issuing instruction according to the middle control host of the left/right turn signal and astern signal detected, Xiang Suoshu vehicle, so that the middle control host pressure is switched to corresponding image output.A kind of system of control multichannel CVBS image switching provided by the invention, on the basis of single channel image inputs the function of showing single channel image, the expansion for realizing that multipath video is shown shows that the existing image of Optimum utilization shows resource, provides a kind of Function Extension scheme of low cost.
Description
Technical field
The present invention relates to automobile technical fields, more particularly to a kind of system of control multichannel CVBS image switching.
Background technique
The demand pressure of the universalness used with automobile, traffic safety is more more and more urgent, and automobile safety electronic is matched
The technology of part is also being constantly improve and is being improved, and based on the electronic security(ELSEC) product based on camera image, because having very
It the features such as intuitively and can parsing, more and more applies in automobile electronics.
But since current most of depots are only equipped with a host, the rare of display panel causes imaging function cannot be very
Good expansion faces such situation, can be equipped with reverse image input interface all the way due to controlling host in majority, while host is supervised
Astern signal threadiness state is surveyed, once detecting reversing activation, forcing switching image is backup camera picture.And now increasingly
It needs to carry out the image of vehicle periphery multi-faceted monitoring and broadcasting, there is an urgent need to will only be able to achieve the expansion of reversing camera switching
Exhibition is that can show that the multipath video of left and right rearview mirror image is shown.
Summary of the invention
It is an object of the present invention to provide a kind of control multichannel CVBS (English: Composite Video
Broadcast Signal, Chinese are as follows: Composite Video Baseband Signal) image switching system, with single channel image input show
On the basis of the function of single channel image, the expansion for realizing that multipath video is shown is shown.
The system that another object of the present invention is to provide for a kind of control multichannel CVBS image switching, Optimum utilization are existing
Image show resource, a kind of Function Extension scheme of low cost is provided.
Particularly, the present invention provides a kind of system of control multichannel CVBS image switching, there is detection for being mounted on
Control mian engine changeover is the vehicle of the function of reverse image in activating automatically when astern signal, to realize multipath video handoff functionality
Extension comprising:
Detection unit, for detecting the left/right turn signal and astern signal of vehicle；
Controller, for according to the left/right turn signal and astern signal detected, the middle control host hair of Xiang Suoshu vehicle
It instructs out, so that the middle control host pressure is switched to corresponding image output.
Optionally, the controller is single-chip microcontroller.
Optionally, the detection unit is to connect the detection circuit of the I/O port of the single-chip microcontroller, the detection circuit point
It is not connected to the reversing lamp driver, left steering lamp route and right turn lamp driver of the vehicle.
Optionally, the I/O port of the single-chip microcontroller detects institute by the detection circuit with cycle detection I/O port condition mode
State the voltage or electric current of reversing line, left steering lamp line and right turn lamp line.
Optionally, the detection circuit believes the voltage or electric current of the reversing line, left steering lamp line and right turn lamp line
Number it is converted into low and high level signal.
It optionally, further include a control key, the control key controls the controller sending described instruction for forcing.
Optionally, the control key is configured as；When the detection unit detects the left and right turn signal of the vehicle
When with astern signal, the control key is disabled.
Optionally, the control key is arranged near the middle control position of host machine of the vehicle.
Optionally, the sending of described instruction is realized by analog switch, and analog switch passes through four tunnel control ports control ten
Wherein control port exports six tunnel input channels switching gating all the way.
Optionally, the controller is configured as: described when left/right turn signal and astern signal is not detected
Instruction is not image output；When only detecting astern signal, described instruction is output reverse image；When only detecting left/right
When turn signal, described instruction is that output left/right turns to image；When being detected simultaneously by left/right turn signal and astern signal,
Described instruction is output reverse image.
The present invention provides it is a kind of control multichannel CVBS image switching system, by detection unit detect vehicle a left side/
Right turn signal and astern signal；By controller according to the left/right turn signal and astern signal detected, Xiang Suoshu vehicle
Middle control host issue instruction so that the middle control host is forced to be switched to corresponding image output.The present invention provides one
The system of kind control multichannel CVBS image switching, it can be achieved that more on the basis of single channel image inputs the function of display single channel image
The expansion that road image is shown shows, it is a kind of Function Extension of low cost that the existing image of very big Optimum utilization, which shows resource,
Scheme.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is a kind of attachment structure schematic diagram of the system of control multichannel CVBS image switching according to the present invention；
Fig. 2 is the power supply circuit that system according to figure 1 is connect with vehicle；
Fig. 3 is the detection circuit figure of the detection unit of system according to figure 1；
Fig. 4 is the connection schematic diagram of the multi-channel analog gating switch of system according to figure 1.
Specific embodiment
Fig. 1 is a kind of attachment structure schematic diagram of the system of control multichannel CVBS image switching according to the present invention.Fig. 2 is
The power supply circuit that system according to figure 1 is connect with vehicle.Fig. 3 is the inspection of the detection unit of system according to figure 1
Slowdown monitoring circuit figure.Fig. 4 is the connection schematic diagram of the multi-channel analog gating switch of system according to figure 1.Below with reference to Fig. 1-Fig. 4
A kind of system of control multichannel CVBS image switching of the invention is described in detail.A kind of control multichannel provided by the invention
There is the system of CVBS image switching control host 3 in activating automatically when detection astern signal to be switched to reversing shadow for being mounted on
The vehicle of the function of picture, to realize the extension of multipath video handoff functionality.In being activated automatically when this astern signal with detection
Control host 3 is switched to the vehicle of the function of reverse image, generally comprise image switching control module 4 and be mounted on before and after vehicle and
The image collection unit of side.Image collection unit includes the rear image collection unit 5 for being mounted on vehicle rear, is mounted on vehicle
The left image collection unit of left side/front left side 6 and it is mounted on the right image collection unit 7 of vehicle right side/front left side.Image is adopted afterwards
Collection unit 5 is used to acquire the image information of vehicle rear, plays reversing image output to be supplied to middle control host 3.Left image is adopted
Collection unit 6 is used to acquire the image information of vehicle left side, plays left side image output to be supplied to middle control host 3.Right image is adopted
Collection unit 7 is used to acquire the image information of vehicle right side, plays right side image output to be supplied to middle control host 3.Image is adopted afterwards
Collection unit 5, left image collection unit 6, right image collection unit 7 may each comprise camera, radar etc..
A kind of system of control multichannel CVBS image switching provided by the invention, generally may include: detection unit 1
With controller 2.Detection unit 1 is used to detect the left/right turn signal and astern signal of vehicle.Controller 2 is used for according to detection
The left/right turn signal and astern signal arrived is issued to the middle control host 3 of vehicle and is instructed, so that middle control host 3 forces switching
For corresponding image output, to realize the extension of multipath video handoff functionality.
Specifically, controller 2 can be control chip or single-chip microcontroller.In one preferred embodiment, controller 2
Using STM8S single-chip microcontroller as control unit, so that Function Extension can be realized in lower cost.STM8S single-chip microcontroller is by such as
The power supply of circuit and vehicle shown in Fig. 2 connects, using the power supply power supply of vehicle.
Cycle detection I/O port condition mode, detection can be used since single-chip microcontroller external interrupt interface is limited in STM8S single-chip microcontroller
Vehicle body left and right turn and astern signal.Wherein three ports of STM8S single-chip microcontroller respectively by detection circuit as shown in Figure 3 with
The reversing line of vehicle, left steering lamp line, the connection of right turn lamp line.Since vehicle body reversing line is 12V storage battery signal, left and right turn letter
Left and right turn taillight after automobile number is connect, part vehicle is 12V, and part vehicle is 5V, and control can be burnt by directly inputting single-chip I/O mouth
Device processed inputs again after needing to convert signal level.The I/O port of single-chip microcontroller is with cycle detection I/O port condition mode
The voltage or electric current of reversing lamp driver, left steering lamp route and right turn lamp driver are detected by detection circuit, detection circuit will
The voltage or current signal of the reversing lamp driver, left steering lamp route and right turn lamp driver are converted into low and high level signal,
To judge that vehicle is in state of rolling backward, left steering lamp connects (i.e. left steering state), right turn lamp connects (i.e. right turn state).
When vehicle is in state of rolling backward, left steering lamp connects (i.e. left steering state), right turn lamp connects (i.e. right turn state), i.e.,
Vehicle needs to carry out the switching of reverse image, left steering image, right turn image, so that middle control host 3 shows corresponding output
Image.State of rolling backward is in when single-chip microcontroller detects vehicle, left steering lamp connects (i.e. left steering state), right turn lamp is connected
When (i.e. right turn state), corresponding instruction is issued, to control in vehicle after original image switching control module semi-finals system connection
One of image collection unit 5, left image collection unit 6, right image collection unit 7, so that middle control host 3 be made to show accordingly
Image output.As shown in figure 4, the sending of the instruction of single-chip microcontroller is realized by analog switch, analog switch is controlled by four tunnels
Wherein control port exports 16 tunnel input channel of port controlling switching gating all the way.The logical table of its multiway analog switch is such as
Under:
The logical table of table 1.DG406 multiway analog switch
Table 1
As shown in Fig. 4 and table 1, multipath video gating output realizes that analog switch is controlled by four tunnels using analog switch
Wherein control port exports 16 tunnel input channel of port controlling switching gating all the way.
In addition, multipath video gating output is additionally provided with priority.The table of priority setting is as follows:
2. multipath video of table gates output priority and table is arranged
Table 2
As shown in table 2, controller 2 is configured as: when left/right turn signal and astern signal is not detected, instruction
For not image output；When only detecting astern signal, instruct to export reverse image；When only detecting left/right turn signal
When, it instructs and turns to image for output left/right；When being detected simultaneously by left/right turn signal and astern signal, instruct to export down
Vehicle image.
Further, the system of a kind of control multichannel CVBS image switching provided by the invention, further includes a control key 8.
Control key 8 is for forcing control controller 2 to issue instruction.Control key 8 is arranged near middle 3 position of control host of the vehicle,
In order to driver's use.Control key 8 is configured as；When detection unit 1 detects the left and right turn signal and reversing letter of vehicle
Number when, control key is disabled.Driver can by control key 8 when vehicle does not issue left and right turn signal and astern signal,
It needs to carry out cyclic switching to multichannel CVBS image according to driver oneself.
Optionally, the system of a kind of control multichannel CVBS image switching provided by the invention, in the parallel connection of its image output end
75 ohm termination resistance, and connect EMC component and prevent electrostatic.
The present invention provides it is a kind of control multichannel CVBS image switching system, by detection unit detect vehicle a left side/
Right turn signal and astern signal；By controller according to the left/right turn signal and astern signal detected, Xiang Suoshu vehicle
Middle control host issue instruction so that the middle control host is forced to be switched to corresponding image output.The present invention provides one
The system of kind control multichannel CVBS image switching, it can be achieved that more on the basis of single channel image inputs the function of display single channel image
The expansion that road image is shown shows, it is a kind of Function Extension of low cost that the existing image of very big Optimum utilization, which shows resource,
Scheme.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of system of control multichannel CVBS image switching, which is characterized in that when there is detection astern signal for being mounted on
Control mian engine changeover is the vehicle of the function of reverse image in automatic activation, to realize the extension of multipath video handoff functionality, packet
It includes:
Detection unit, for detecting the left/right turn signal and astern signal of vehicle；
Controller, for being referred to according to the middle control host sending of the left/right turn signal and astern signal detected, Xiang Suoshu vehicle
It enables, so that the middle control host pressure is switched to corresponding image output.
2. the system of control multichannel CVBS image switching according to claim 1, which is characterized in that the controller is single
Piece machine.
3. the system of control multichannel CVBS image switching according to claim 2, which is characterized in that the detection unit is
Connect the detection circuit of the I/O port of the single-chip microcontroller, the detection circuit be respectively connected to the vehicle reversing lamp driver,
Left steering lamp route and right turn lamp driver.
4. the system of control multichannel CVBS image switching according to claim 3, which is characterized in that the IO of the single-chip microcontroller
The reversing line, left steering lamp line and right turn are detected by the detection circuit in a manner of cycle detection I/O port state in port
The voltage or electric current of lamp line.
5. the system of control multichannel CVBS image switching according to claim 4, which is characterized in that the detection circuit will
The voltage or current signal of the reversing line, left steering lamp line and right turn lamp line are converted into low and high level signal.
6. the system of control multichannel CVBS image switching according to claim 4, which is characterized in that further include a control
Key, the control key control the controller sending described instruction for forcing.
7. the system of control multichannel CVBS image switching according to claim 6, which is characterized in that the control key is matched
Be set to: when the detection unit detects the left/right turn signal and astern signal of the vehicle, the control key is banned
With.
8. the system of control multichannel CVBS image switching according to claim 6, which is characterized in that the control key setting
Near the middle control position of host machine of the vehicle.
9. the system of control multichannel CVBS image switching according to claim 4, which is characterized in that the sending of described instruction
It is realized by analog switch, analog switch controls 16 tunnel input channels switching gating by four tunnel control ports and wherein controls all the way
Port output processed.
10. the system of control multichannel CVBS image switching according to claim 4, which is characterized in that the controller quilt
It is configured that when left/right turn signal and astern signal is not detected, described instruction is not image output；When only detecting
When astern signal, described instruction is output reverse image；When only detecting left/right turn signal, described instruction be output it is left/
Right turn image；When being detected simultaneously by left/right turn signal and astern signal, described instruction is output reverse image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910596453.8A CN110329181A (en) | 2019-07-03 | 2019-07-03 | A kind of system of control multichannel CVBS image switching |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910596453.8A CN110329181A (en) | 2019-07-03 | 2019-07-03 | A kind of system of control multichannel CVBS image switching |
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| CN110329181A true CN110329181A (en) | 2019-10-15 |
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| CN201910596453.8A Pending CN110329181A (en) | 2019-07-03 | 2019-07-03 | A kind of system of control multichannel CVBS image switching |
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Patent Citations (8)
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|---|---|---|---|---|
| CN2633659Y (en) * | 2003-06-09 | 2004-08-18 | 秦皇岛秦冠弧度镜有限公司 | Controller for automobile goods monitoring and rear view monitoring when backing car |
| CN201789568U (en) * | 2010-09-21 | 2011-04-06 | 广州市奇舰达电子有限公司 | Switching device for front left-right angle videos and backing rear view of automobile |
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