CN108646626A - A kind of mobile unit control signal transmission protection system - Google Patents
A kind of mobile unit control signal transmission protection system Download PDFInfo
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- CN108646626A CN108646626A CN201810554524.3A CN201810554524A CN108646626A CN 108646626 A CN108646626 A CN 108646626A CN 201810554524 A CN201810554524 A CN 201810554524A CN 108646626 A CN108646626 A CN 108646626A
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- 230000008054 signal transmission Effects 0.000 title claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims abstract description 20
- 238000010168 coupling process Methods 0.000 claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 239000000872 buffer Substances 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- 230000002633 protecting effect Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000001052 transient effect Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 241000721047 Danaus plexippus Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000007849 functional defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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Abstract
The present invention relates to a kind of mobile unit control signal transmissions to protect system, it is integrated in the circuit of on-vehicle host and vehicle carried video control device, including being used to connect onboard sensor and the anti-overvoltage of digital signal input end, the input signal protection module of anti-overflow, analog signal protection module, the both ends of digital signal protection module are connect with the input terminal of the output end of input signal protection module and voltage level conversion and signal coupling module respectively, voltage level conversion and signal coupling module, digital signal processing module, on-vehicle host and audio-visual control device, voltage level conversion and signal coupling module, anti-overflow and anti-die block excessively, output circuit protection module, signal output end is sequentially connected；The present invention is compared to existing product, and protection simple circuit is efficient, and peripheral matched circuit devcie is few; portable autgmentability is strong, and performance is more stable, strong antijamming capability; the protecting effect of circuit and signal is more preferable, effectively raises the stability of automobile control signal transmission and vehicle electronic device operation.
Description
Technical field
The present invention relates to a kind of control of vehicle electronic device, power supply signals to handle transmission protection system, especially includes anti-
Overvoltage pulse suppressor, anti-overflow circuit, noise filter circuit, voltage level conversion, signal coupling circuit, signal acquisition, control
Processor processed, the control of automatic alarm, power supply signal handle transmission protection system.
Background technology
With the development of modern electronic technology and the development of automobile, the control system of automobile is increasingly dependent on electric signal control
With the transmission of electronic data signals.Vehicle electronics input signal such as ACC igniting, headlight ILL, reversing BACK, steering wheel control
Device SWC processed, parking PAKE etc., vehicle body pass it is defeated during be easy by engine, battery power circuit, external signal, electricity
Conducted signal interference on the spacing electromagnetic radiation of road plate cabling, circuit, leads to signal skew, data entanglement, influences automobile electricity
Accurate, the reliability of sub- device signal Acquisition Circuit.
For the driving safety of support vehicles, ensure the accuracy of signal transmission, it usually needs install additional and protect to mobile unit
Control signal is converted into pure, normal input signal by protection circuit.It is existing since the input parameter of various signals has differences
Have input signal acquisition protection circuit generally using complicated fuse, ESD pipes, TVS pipe, magnetic transformer, photo-coupler, after
Electric appliance, and input end signal type excessively causes input terminal protecting circuit excessively complicated too fat to move, increases the complexity of circuit design
Property, stability, maintenance difficulties.
Vehicle electronic device will need to export associated control signal according to function, therefore defeated after handling input signal
Outlet is also required to increase protection circuit to protect the safety of equipment itself.
Invention content
In order to reduce the signal acquisition of mobile unit, control the circuit complexity of signal, provide it is a kind of for signal input,
The protection structure of output circuit, it is of the existing technology to overcome the problems, such as, the design efficiency of product facility is improved, this practicality newly carries
System is protected for a kind of mobile unit control signal transmission.
The present invention includes such as lower part：
Input signal protection module for connecting onboard sensor and the anti-overvoltage of digital signal input end, anti-overflow；
The anti-reverse protection of diode for the analog signals such as level triggers, voltage sample to be protected and filtered, electricity
The analog signal protection module of resistance partial pressure and Order RC filtering；
For the digital signals such as PWM frequency pulse-modulated signal, audio, video and Digital Logic to be protected and are filtered
Multistage triode follow, buffer the digital signal protection module of isolation, voltage anti-reverse protection and the filtering of second order LC, π type；
For unidirectional, two-way and single supply, the voltage level conversion of the data path of dual power supply and signal coupling module；
Between associated voltage, electric current, frequency, the parameter of duty ratio and each signal for judging input signal when
Sequence, and it is transferred to the digital signal processing module of vehicle electronic device host, vehicle carried video control device；
Voltage level conversion and signal coupling module for output signal protection；
The anti-overflow and anti-die block excessively protected for single channel, multichannel outlet line；
For output circuit false alarm, inhibit electrostatic interference, the output circuit protection module of reverse-filling；
The both ends output end with input signal protection module respectively of analog signal protection module, digital signal protection module
It is connected with voltage level conversion with the input terminal of signal coupling module, voltage level conversion and signal coupling module, digital processing
Module, on-vehicle host and audio-visual control device, voltage level conversion and signal coupling module, anti-overflow and anti-cross die block, defeated
Go out circuit protection module, signal output end is sequentially connected.
Preferably, the digital signal processing module be integrated with MCU miniature control circuits, GPU graphic processing circuits,
DSP digital signal processing circuits.
The beneficial effects of the invention are as follows：Compared to existing product, protection simple circuit is efficient, peripheral matched circuit devcie
Few, portable autgmentability is strong, and performance is more stable, strong antijamming capability, and the protecting effect of circuit and signal is more preferable, effective to improve
The stability of automobile control signal transmission and vehicle electronic device operation.
Description of the drawings
Fig. 1 is the modular structure schematic diagram of the present invention
Fig. 2 is the signal processing flow figure of the present invention.
Fig. 3 is the level shifting circuit exemplary plot of the present invention.
Fig. 4 is the single channel control current limliting chip interior logic chart of the present invention.
Fig. 5 is the single channel control current limliting chip control circuit exemplary plot of the present invention.
Fig. 6 is the multi-way contral current limliting chip control circuit exemplary plot of the present invention.
Specific implementation mode
Referring to Fig. 1 and Fig. 2, the present invention includes：
Input signal protection module for connecting onboard sensor and the anti-overvoltage of digital signal input end, anti-overflow；
The anti-reverse protection of diode for the analog signals such as level triggers, voltage sample to be protected and filtered, electricity
The analog signal protection module of resistance partial pressure and Order RC filtering；
For the digital signals such as PWM frequency pulse-modulated signal, audio, video and Digital Logic to be protected and are filtered
Multistage triode follow, buffer the digital signal protection module of isolation, voltage anti-reverse protection and the filtering of second order LC, π type；
For unidirectional, two-way and single supply, the voltage level conversion of the data path of dual power supply and signal coupling module；
Between associated voltage, electric current, frequency, the parameter of duty ratio and each signal for judging input signal when
Sequence, and it is transferred to the digital signal processing module of vehicle electronic device host, vehicle carried video control device；
Voltage level conversion and signal coupling module for output signal protection；
The anti-overflow and anti-die block excessively protected for single channel, multichannel outlet line；
For output circuit false alarm, inhibit electrostatic interference, the output circuit protection module of reverse-filling；
The both ends output end with input signal protection module respectively of analog signal protection module, digital signal protection module
It is connected with voltage level conversion with the input terminal of signal coupling module, voltage level conversion and signal coupling module, digital processing
Module, on-vehicle host and audio-visual control device, voltage level conversion and signal coupling module, anti-overflow and anti-cross die block, defeated
Go out circuit protection module, signal output end is sequentially connected.
The onboard sensor and digital signal input end of the present invention, including the input of vehicle electronic device signal, output patch
Part, contains several terminals thereon, and terminal types are divided into signaling bearer terminal, control signaling bearer terminal and composite bearing end
Son, it is characterised in that above-mentioned terminal is respectively connected to one end of transient voltage suppressor diode, transient voltage suppressor diode
The other end ground connection.
The present invention is using transient voltage suppressor diode instead of in the prior art by two diodes and electric power generating composition
Clamp circuit, due to transient voltage suppressor diode, with fast response time, transient power is big, leakage current is low, impact resistance ability
By force, the features such as small, while its characteristic with bidirectional conduction, the transient pulse of extraneous positive-negative polarity can be inhibited to believe simultaneously
Number, there is high transient power, monarch's credit SMDJ26A transient powers Pppm that this programme uses reaches as high as 3000Watts, pincers
Position voltage is up to 26V, can meet the requirement of most vehicle electronics 12V power-supply system signals inputs, output, this
As soon as sample, not only solve the problems, such as it is of the existing technology, while to signal input output end provide it is more reliable and
The safeguard measure of safety, improves the safety of equipment, it is clear that the purpose of the present invention is achieved.Simultaneously according to each input terminal
Parameters situation and the equipment such as level voltage, electric current, frequency, duty ratio power, the level electricity of input signal that can bear
The parameters situation such as pressure, electric current, frequency, duty ratio selects the transient voltage suppressor diode of different parameters, such as PKA26A, SM6A27
Deng.
The present invention uses the anti-reverse protection of diode, electricity for the analog signal of the types such as level triggers, voltage value sampling
Resistance partial pressure and Order RC filter circuit, have and inhibit overshoot pulse signal, fast response time, high/low frequency filtering effect are good, resistance to
The features such as impact capacity is strong, area is small, the capacitance of a variety of capacitances have the characteristic for filtering out height frequency noise, can inhibit simultaneously
The transient pulse AC signal of extraneous positive-negative polarity retains flip-flop, can meet most vehicle electronics 12V electricity
The requirement that source system signal is inputted, exported, it is so, of the existing technology with regard to not only solving the problems, such as, while to signal
Input and output terminal provides more reliable and safety safeguard measure, improves the safety of equipment, it is clear that mesh of the invention
Be achieved.
The present invention is for digital signals such as PWM frequency pulse-modulated signal, audio, video, Digital Logic using multistage three
The filter circuits such as the anti-reverse protection of pole pipe follower, buffer isolator, voltage and second order LC, π type are protected, and there is waveform to become
Shape is small, can eliminate the characteristics of common-mode noise in electrical automotive circuits, eliminates the problem of front stage ground difference causes,
Ensure that signal is pure, interference noise caused by engine rotation is reduced, such as using BA3121 audios isolator, NJM2505 videos
The circuits such as isolator.It avoids noise from entering the circuits such as rear class signal acquisition, power amplification, video decoding, microcontroller, influences
The stability of system.
Referring to Fig. 2 and Fig. 3, the present invention is directed to the direct current of various signals in automobile electronics, exchange level magnitudes logic
Difference problem using circuits such as unidirectional, two-way and single supply, dual power supply level shifting circuit, coupling isolation there is high pressure to protect
Shield, peripheral components are few, signal stabilization, simplify the characteristics of circuit.Pull-up resistor, RC circuits, diode, triode in existing design
Equal conversion circuits are one-way transmissions and parasitic capacitance is big, it is difficult to convert high-volume high-speed bidirectional signal；And two-way circuit can solve
The certainly input/output logic coordinating problem inside Unidirectional transmission circuit, improves the rate of data transmission, greatly improves data rising
Along slope, reduce capacitive load, realize that high logic level is converted into low logic level, MAX3232E family chips can be from serial
The +/- 15V of negative logic level is converted into positive logic CMOS level 3.3V, realizes that low logic level is converted into high logic level,
TXB010XX family chips can be converted into 3.3V from 1.8V, and general line system chip PCA9575PW can be converted from 1V~3.3V
At 5.5V.
The present invention digital signal processing module include MCU microcontrollers, GPU processors and DSP digital processing units, number at
Reason module judge between associated voltage, electric current, frequency, duty ratio, the parameter of data frame and each signal of input signal when
Sequence carries out modulus/digital-to-analogue conversion, communication Protocol Conversion, external input signal is transferred at other internal unit modules
Then reason is required according to vehicle electronics correlation function, generate the corresponding signal output waveform of vehicle electronics, power supply electricity
Pressure.For realizing the digital-to-analogue conversion of such as sound and vision signal, CAN, LIN, Ethernet, LVDS signals in vehicle electronics
Function.
Referring to fig. 4 to fig. 6, the present invention is for the level voltage of leading-out terminal signal, electric current, frequency, duty cycle parameters feelings
Condition selects different signals, power output circuit, such as level triggers, PWM frequency pulse-modulated signal, power supply voltage signal, sound
Frequently, video, digital logic signal etc..Different output terminal protecting circuits use different control protected modes, such as single channel control
Current limliting chips W S4620H, USB controls current limliting chip TPS22918, multi-way contral current limliting chip TLE8718SA, have current limliting,
Anti- overvoltage avoids false alarm, inhibits the functions such as electrostatic interference, reverse-filling.It can be to avoid the insurance employed in existing design
The drift of the circuit temperatures such as silk, voltage comparator, overcurrent-overvoltage trigger, diode, individual parameter error, functional defect, high frequency
The problems such as false triggering protection caused by characteristic difference, overcurrent-overvoltage high temperature are burnt.Such as work(can be widely used in vehicle electronics
Put amplifier sound, video, CAN, LIN, Ethernet, LVDS signals output and active high frequency antenna, external equipment power supply,
The power output protection circuits such as USB.
Claims (2)
1. a kind of mobile unit control signal transmission protects system, it is integrated in the circuit of on-vehicle host and vehicle carried video control device
In, it is characterized in that including such as lower part：
Input signal protection module for connecting onboard sensor and the anti-overvoltage of digital signal input end, anti-overflow；
The anti-reverse protection of diode for the analog signals such as level triggers, voltage sample to be protected and filtered, resistance point
The analog signal protection module of pressure and Order RC filtering；
It is more for what the digital signals such as PWM frequency pulse-modulated signal, audio, video and Digital Logic were protected and filtered
Grade triode follows, buffers the digital signal protection module of isolation, voltage anti-reverse protection and the filtering of second order LC, π type；
For unidirectional, two-way and single supply, the voltage level conversion of the data path of dual power supply and signal coupling module；
The sequential between associated voltage, electric current, frequency, the parameter of duty ratio and each signal for judging input signal, and
It is transferred to the digital signal processing module of vehicle electronic device host, vehicle carried video control device；
Voltage level conversion and signal coupling module for output signal protection；
The anti-overflow and anti-die block excessively protected for single channel, multichannel outlet line；
For output circuit false alarm, inhibit electrostatic interference, the output circuit protection module of reverse-filling；
Analog signal protection module, digital signal protection module both ends respectively with the output end and electricity of input signal protection module
Voltage level conversion is connected with the input terminal of signal coupling module, voltage level conversion and signal coupling module, digital signal processing module,
On-vehicle host and audio-visual control device, voltage level conversion and signal coupling module, anti-overflow and anti-die block, output circuit excessively
Protection module, signal output end are sequentially connected.
2. a kind of mobile unit control signal transmission according to claim 1 protects system, it is characterized in that：The number
Processing module is integrated with MCU miniature control circuits, GPU graphic processing circuits, DSP digital signal processing circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810554524.3A CN108646626A (en) | 2018-05-31 | 2018-05-31 | A kind of mobile unit control signal transmission protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810554524.3A CN108646626A (en) | 2018-05-31 | 2018-05-31 | A kind of mobile unit control signal transmission protection system |
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| Publication Number | Publication Date |
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| CN108646626A true CN108646626A (en) | 2018-10-12 |
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| CN201810554524.3A Pending CN108646626A (en) | 2018-05-31 | 2018-05-31 | A kind of mobile unit control signal transmission protection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109977060A (en) * | 2019-05-15 | 2019-07-05 | 哈尔滨汽轮机厂有限责任公司 | A kind of multifunctional signal expanding unit |
| CN114175582A (en) * | 2019-07-18 | 2022-03-11 | 马自达汽车株式会社 | Network line concentrator |
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| CN102570797A (en) * | 2012-02-17 | 2012-07-11 | 易程（苏州）智能***有限公司 | Power supply device for video system on high-speed train |
| CN202352339U (en) * | 2011-11-16 | 2012-07-25 | 北京经纬恒润科技有限公司 | Vehicle-mounted sound system |
| JP2014003819A (en) * | 2012-06-19 | 2014-01-09 | Hitachi Ltd | Digital protection control device |
| CN204203687U (en) * | 2014-10-26 | 2015-03-11 | 苏州英纳索智能科技有限公司 | A kind of analogue quantity output circuit |
| CN205921363U (en) * | 2016-06-29 | 2017-02-01 | 广东英得尔实业发展有限公司 | Direct current overvoltage protection system of on -vehicle refrigerator |
-
2018
- 2018-05-31 CN CN201810554524.3A patent/CN108646626A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202352339U (en) * | 2011-11-16 | 2012-07-25 | 北京经纬恒润科技有限公司 | Vehicle-mounted sound system |
| CN102570797A (en) * | 2012-02-17 | 2012-07-11 | 易程（苏州）智能***有限公司 | Power supply device for video system on high-speed train |
| JP2014003819A (en) * | 2012-06-19 | 2014-01-09 | Hitachi Ltd | Digital protection control device |
| CN204203687U (en) * | 2014-10-26 | 2015-03-11 | 苏州英纳索智能科技有限公司 | A kind of analogue quantity output circuit |
| CN205921363U (en) * | 2016-06-29 | 2017-02-01 | 广东英得尔实业发展有限公司 | Direct current overvoltage protection system of on -vehicle refrigerator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109977060A (en) * | 2019-05-15 | 2019-07-05 | 哈尔滨汽轮机厂有限责任公司 | A kind of multifunctional signal expanding unit |
| CN114175582A (en) * | 2019-07-18 | 2022-03-11 | 马自达汽车株式会社 | Network line concentrator |
| CN114175582B (en) * | 2019-07-18 | 2024-04-12 | 马自达汽车株式会社 | Network line concentration device |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 331100 hi tech Industrial Park, Yichun, Yichun, Jiangxi Province, No. 12 Applicant after: Faurecia music electronics (Fengcheng) Co.,Ltd. Address before: 331100 hi tech Industrial Park, Yichun, Yichun, Jiangxi Province, No. 12 Applicant before: FAURECIA COAGENT ELECTRONICS S & T Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181012 |