CN106303301A - Video control circuit based on vehicle data bus - Google Patents
Video control circuit based on vehicle data bus Download PDFInfo
- Publication number
- CN106303301A CN106303301A CN201610693175.4A CN201610693175A CN106303301A CN 106303301 A CN106303301 A CN 106303301A CN 201610693175 A CN201610693175 A CN 201610693175A CN 106303301 A CN106303301 A CN 106303301A
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- Prior art keywords
- control signal
- control
- video
- bus
- data
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Classifications
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- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Small-Scale Networks (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
Abstract
nullA kind of video control circuit based on vehicle data bus，Relate to a kind of automobile video and control device，Including automobile controller、Control signal input equipment、Control signal is analyzed and processing means、Control signal output device、Video controls processing means、Power control and CD display，Described power control is connected with control signal analysis and processing means，This device is by decoding automobile bus data，Read Body Control state，And according to virtual condition，Carry out the control of Vehicular video，Rat tail can be reduced，Have only to a pair data/address bus of transferring，Just can extract required control signal，It is convenient to install，Easy-to-understand，Avoid brokenly the situation of line wiring，Different types of data/address bus can be mated by changing different bus transceivers，The bus data realizing dissimilar vehicle extracts，Cost-saved，Reduce the construction cycle，Pattern variation，Significant.
Description
Technical field:
The present invention relates to a kind of automobile video and control device, be specifically related to a kind of video based on vehicle data bus and control
Circuit.
Background technology:
Existing Vehicular video control circuit, uses the mode of level detection as video control signal at design aspect
Input, uses high level output as the video control mode of display end.Thus need to connect corresponding letter in installation process
Number control line, and damaged former vehicle wire harness, and each signal is required for single wire harness and carries out signal detection, causes wire harness more,
Complexity is installed, it is impossible to meet all display ends of existing In-vehicle networking, in terms of video control, also cannot reasonably judge detection
The accuracy of signal, in order to solve above-mentioned technical problem, a kind of new technical scheme of special proposition.
Summary of the invention:
The invention aims to the weak point overcoming above-mentioned prior art to exist, and provide a kind of based on automobile number
According to the video control circuit of bus, it is easy to use, simple to operate, be prone to large-scale promotion application.
The technical solution used in the present invention is: a kind of video control circuit based on vehicle data bus, including automobile control
Device processed, control signal input equipment, control signal analysis and processing means, control signal output device, video control process dress
Put, power control and CD display, described power control is connected with control signal analysis and processing means, controls
Signal analysis and processing means are connected with control signal input equipment, and control signal input equipment is connected with automobile controller, institute
Control signal analysis and the processing means stated are connected with bus external device, and bus external device is with control signal output device even
Connecing, control signal output device is connected with CD display, and control signal analysis and processing means control processing means even with video
Connecing, video controls processing means and is connected with CD display.
Described control signal input equipment is the command input of vision operation, by vehicle body data/address bus by vehicle body
All data access circuit receiving terminals of status；All data contain car light signal, steering wheel angle signal, and screen controls
The input of signal；Circuit receiving terminal is connected with control signal analysis and processing means.
Described control signal analysis and processing means include data receiver, data analysis and control response；Control signal
Analyze and processing means will be analyzed from circuit receiving terminal received signal input master control borad, judge, identify, extract and repair
Change；Described analysis and process are all completed by master control borad, it is ensured that read vehicle body state and response in real time.
After being processed by master control borad, data are transferred to control signal output device, then turn through control signal output device
Being defeated by CD display, process described herein refers to that automobile bus data can be modified by master control borad and ID in transmitting procedure
Shielding.
Described video controls processing means and is inputted by multi-channel video, and single channel exports, when receiving corresponding control signal, depending on
Frequency will realize corresponding operation, and control signal described herein is the car light signal of automobile, dish control signal；Vehicle operating steering indicating light
Or during back-up lamp, the input display that can synchronize to realize video controls.
Described power control: the control design case of power supply circuits, under normal circumstances, when master control borad does not receives number of buses
According to time, the switching tube of power supply circuits disconnects, and when having detected that data inputs, the switching tube of power supply circuits turns on, and can reduce
Power consumption, installs and is avoided that wiring difficulty.
The invention has the beneficial effects as follows: this device by decoding automobile bus data, read Body Control state, and according to
Virtual condition, carries out the control of Vehicular video, can reduce rat tail, it is only necessary to a pair data/address bus of transferring, it is possible to extract
Required control signal, it is convenient to install, easy-to-understand, it is to avoid the situation of broken line wiring, can receive by changing different buses
Send out device and mate different types of data/address bus, it is achieved the bus data of dissimilar vehicle extracts, cost-saved, reduce exploitation
Cycle, pattern variation, significant.
Accompanying drawing illustrates:
Fig. 1 is present configuration block diagram.
Fig. 2 is bus transmission circuit frame diagram of the present invention.
Fig. 3 is bus transmission circuit connection figure of the present invention.
Fig. 4 is that video of the present invention controls processing means structural representation.
Fig. 5 is the schematic diagram of power control of the present invention.
Fig. 6 is control signal analysis of the present invention and processing means schematic diagram.
Detailed description of the invention:
With reference to each figure, a kind of video control circuit based on vehicle data bus, defeated including automobile controller, control signal
Enter device, control signal analysis and processing means, control signal output device, video control processing means, power control
And CD display, described power control is connected with control signal analysis and processing means, control signal analysis and process
Device is connected with control signal input equipment, and control signal input equipment is connected with automobile controller, and described control signal is divided
Analysis and processing means are connected with bus external device, and bus external device is connected with control signal output device, and control signal is defeated
Going out device to be connected with CD display, control signal analysis and processing means control processing means with video and are connected, at video control
Reason device is connected with CD display.
Described control signal input equipment is the command input of vision operation, by vehicle body data/address bus by vehicle body
All data access circuit receiving terminals of status；All data contain car light signal, steering wheel angle signal, and screen controls
The input of signal；Circuit receiving terminal is connected with control signal analysis and processing means.
Described control signal analysis and processing means include data receiver, data analysis and control response；Control signal
Analyze and processing means will be analyzed from circuit receiving terminal received signal input master control borad, judge, identify, extract and repair
Change；Described analysis and process are all completed by master control borad, it is ensured that read vehicle body state and response in real time.
After being processed by master control borad, data are transferred to control signal output device, then turn through control signal output device
Being defeated by CD display, process described herein refers to that automobile bus data can be modified by master control borad and ID in transmitting procedure
Shielding.
Described video controls processing means and is inputted by multi-channel video, and single channel exports, when receiving corresponding control signal, depending on
Frequency will realize corresponding operation, and control signal described herein is the car light signal of automobile, dish control signal；Vehicle operating steering indicating light
Or during back-up lamp, the input display that can synchronize to realize video controls.
Described power control: the control design case of power supply circuits, under normal circumstances, when master control borad does not receives number of buses
According to time, the switching tube of power supply circuits disconnects, and when having detected that data inputs, the switching tube of power supply circuits turns on, and can reduce
Power consumption, installs and is avoided that wiring difficulty.
Wherein in figure: Ro is bus build-out resistor at end, R1 is biasing resistor, and R2 is current-limiting resistance, and R3 is current-limiting resistance, R4
For pull-up resistor, C1 is power input filter capacitor, and C2 is power output end filter capacitor, and M0 is switch mosfet pipe, Q0
For NPN type triode；
It is described with reference to the accompanying drawings operation principle:
As shown in Figure 1: described automobile controller is the transmitting terminal of automobile bus signal, process vehicle information signals, this
Circuit connects this bus and reads Body Control signal such as automobile gear level data, light data, DVD navigational control signals etc.；Described
Control signal input equipment and control signal output device provide differential transfer ability and having for bus transceiver to bus
The differential received ability for controller, described bus external device is had to provide a road bus hardware interface for MCU processor,
The peripheral equipment requirement of MCU can be met；Described power control is the power control part of whole circuit, receives without bus message
Time can automatically shut power off, reduce power consumption；Described video controls processing means can control input and the output of video end, passes through
Data processing module extracts former car control signal, performs corresponding operation, it is achieved function.
As shown in Figures 2 and 3: for data receiver, transmission and the data processing module block diagram of this circuit, by former car number of buses
According to accessing data processing module, it is analyzed processing and being sent to CD display after information retrieval, completes the transmission of whole data
Link；Data transmit and use difference load mode, and Ro is that terminal build-out resistor is in order to eliminate the signal in the middle of communication process
Reflection, solves the impedance discontinuity in communication process and the problem of impedance mismatch, improves network node topology ability.
As shown in Figure 4: for the video control portions of this road circuit design, described video inputs refers to gather exterior view
Image signal inputs, and can connect the video signal on 2 to 4 tunnels, and described video output terminals is that final selection one road video signal enters
Row output, in figure, CE pin is the enable pin of Video Controller, is controlled by MCU control signal, Low level effective, R4
Resistance is pull-up resistor, it is ensured that the duty of Video Controller and the stability of state, and IN0, IN1 are control signal pin,
For selecting outer video signal input channel, specific as follows:
| IN1 | IN0 | CE | Video channel number |
| / | / | 1 | / |
| 0 | 0 | 0 | 1 |
| 0 | 1 | 0 | 2 |
| 1 | 0 | 0 | 3 |
| 0 | 0 | 0 | 4 |
Video control signal is carried out, it is achieved the selection of video by control signal.Described control signal is at signal
The reason control level that sends of module, after extracting the vehicle control signal of bus transfer, by analysis and judge, to video control
Corresponding operation carried out by device.
As shown in Figure 5: for the power control part of this circuit, shown C1 and C2 is that power filtering capacitor reaches may filter that
Power supply disturbance ripple, R2, R3 are current-limiting resistance, protection Q0 do not punctured by big electric current, R1 is biasing resistor, arrange M0 for close
State, M0 is that p-type metal-oxide-semiconductor is turned on and off by Q0 control G pole level.When bus signals being detected, by M0 for leading
Logical, when being otherwise not detected by bus signals within a period of time, M0 to be closed, the power consumption of circuit is preferably minimized, and guarantees in reality
Process can avoid connecing ACC, solves the problem that ACC power supply difficulty is looked for, more convenient.
As shown in Figure 6: the core controlled for this circuit, shown control framework figure shows the mutual relation of modules
And control logic.
This device, by decoding automobile bus data, reads Body Control state, and according to virtual condition, carries out vehicle-mounted regarding
The control of frequency, can reduce rat tail, it is only necessary to a pair data/address bus of transferring, it is possible to the control signal required for extraction, peace
It is convenient to fill, easy-to-understand, it is to avoid the situation of broken line wiring, can mate different types of number by changing different bus transceivers
According to bus, it is achieved the bus data of dissimilar vehicle extracts, cost-saved, reduce construction cycle, pattern variation, have
Significance.
Claims (6)
1. a video control circuit based on vehicle data bus, it is characterised in that: include that automobile controller, control signal are defeated
Enter device, control signal analysis and processing means, control signal output device, video control processing means, power control
And CD display, described power control is connected with control signal analysis and processing means, control signal analysis and process
Device is connected with control signal input equipment, and control signal input equipment is connected with automobile controller, and described control signal is divided
Analysis and processing means are connected with bus external device, and bus external device is connected with control signal output device, and control signal is defeated
Going out device to be connected with CD display, control signal analysis and processing means control processing means with video and are connected, at video control
Reason device is connected with CD display.
Video control circuit based on vehicle data bus the most according to claim 1, it is characterised in that: described control
Signal input apparatus is the command input of vision operation, by vehicle body data/address bus by all data of vehicle body status
Access circuit receiving terminal；All data contain car light signal, steering wheel angle signal, the input of screen control signal；Circuit connects
Receiving end is connected with control signal analysis and processing means.
Video control circuit based on vehicle data bus the most according to claim 2, it is characterised in that: described control
Signal analysis and processing means include data receiver, data analysis and control response；Control signal is analyzed and processing means will be from
Circuit receiving terminal received signal input master control borad is analyzed, judges, identifies, extracts and revises；Described analysis and place
Reason is all completed by master control borad, it is ensured that read vehicle body state and response in real time.
Video control circuit based on vehicle data bus the most according to claim 3, it is characterised in that: master control will be passed through
After plate processes, data are transferred to control signal output device, then transfer to CD display through control signal output device, herein
Described process refers to that automobile bus data can be modified by master control borad and ID shielding in transmitting procedure.
Video control circuit based on vehicle data bus the most according to claim 1, it is characterised in that: described video
Controlling processing means to be inputted by multi-channel video, single channel exports, and when receiving corresponding control signal, video will realize corresponding behaviour
Making, control signal described herein is the car light signal of automobile, dish control signal；When vehicle operating steering indicating light or back-up lamp, can be same
Step realizes the input display of video and controls.
Video control circuit based on vehicle data bus the most according to claim 1, it is characterised in that: described power supply
Control device: the control design case of power supply circuits, under normal circumstances, when master control borad does not receives bus data, opening of power supply circuits
Pass pipe disconnects, when having detected that data input, and the switching tube conducting of power supply circuits, power consumption can be reduced, installation is avoided that and connects
Line difficulty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693175.4A CN106303301A (en) | 2016-08-19 | 2016-08-19 | Video control circuit based on vehicle data bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693175.4A CN106303301A (en) | 2016-08-19 | 2016-08-19 | Video control circuit based on vehicle data bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106303301A true CN106303301A (en) | 2017-01-04 |
Family
ID=57661649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610693175.4A Pending CN106303301A (en) | 2016-08-19 | 2016-08-19 | Video control circuit based on vehicle data bus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490227A (en) * | 2018-06-26 | 2018-09-04 | 重庆力华科技有限责任公司 | A kind of vehicle mounted multimedia product test circuit of control line superposition communication test instruction |
| CN109743620A (en) * | 2019-01-28 | 2019-05-10 | 北京北方长城光电仪器有限公司 | It is a kind of to support vehicle carrying video system derived from online and offline USB interface video data |
| CN116722789A (en) * | 2023-06-26 | 2023-09-08 | 深圳市精微康投资发展有限公司 | Multiple anti-interference precision motor connector |
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Patent Citations (5)
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| CN1821911A (en) * | 2005-01-06 | 2006-08-23 | 哈曼贝克自动系统-威美科公司 | Vehicle-state based parameter adjustment system |
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| US20110096233A1 (en) * | 2009-10-22 | 2011-04-28 | Seiko Epson Corporation | Control device and electronic device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490227A (en) * | 2018-06-26 | 2018-09-04 | 重庆力华科技有限责任公司 | A kind of vehicle mounted multimedia product test circuit of control line superposition communication test instruction |
| CN108490227B (en) * | 2018-06-26 | 2023-09-05 | 重庆力华科技有限责任公司 | Vehicle-mounted multimedia product test circuit with control line overlapped with communication test instruction |
| CN109743620A (en) * | 2019-01-28 | 2019-05-10 | 北京北方长城光电仪器有限公司 | It is a kind of to support vehicle carrying video system derived from online and offline USB interface video data |
| CN116722789A (en) * | 2023-06-26 | 2023-09-08 | 深圳市精微康投资发展有限公司 | Multiple anti-interference precision motor connector |
| CN116722789B (en) * | 2023-06-26 | 2024-04-26 | 深圳市连创科技有限公司 | Multiple anti-interference precision motor connector |
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Application publication date: 20170104 |