CN103434461A - Optical network-based automobile electric system - Google Patents
Optical network-based automobile electric system Download PDFInfo
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- CN103434461A CN103434461A CN2013103304447A CN201310330444A CN103434461A CN 103434461 A CN103434461 A CN 103434461A CN 2013103304447 A CN2013103304447 A CN 2013103304447A CN 201310330444 A CN201310330444 A CN 201310330444A CN 103434461 A CN103434461 A CN 103434461A
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Abstract
The invention relates to an optical network-based automobile electric system. The optical network-based automobile electric system comprises a main optical fiber, a sensor, an optical receiving and transmitting assembly, a gateway and a peripheral assembly of an automobile, wherein an electric signal measured by the sensor can be converted into an optical signal through the optical receiving and transmitting assembly and can be transmitted to the peripheral assembly of the automobile through a main network, the gateway and the optical receiving and transmitting assembly; the peripheral assembly of the automobile comprises an engine ECU (Electronic Control Unit), a transmission system TCU (Transmission Control Unit), a brake system ABS (Anti-lock Brake System), a light control ECU, a door and window control ECU, a power distribution ECU, an antitheft ECU, an SRS (Supplementary Restraint System) ECU, a back-up ECU, an entertainment terminal and a navigation unit. According to the optical network-based automobile electric system disclosed by the invention, an optical control signal can be transmitted through the main optical fiber, not only can the problems of electric short circuit, electromagnetic disturbance and degraded and melt-down circuit be completely avoided by a control circuit, but also various communication protocols including CAN (Controller Area Network), LIN (Local Interconnect Network), FlexRay and MOST (Media Oriented System Transport) can be simultaneously compatible, a video signal can be quickly transmitted, and the requirements on high speed and sharing of information of the automobile can be met.
Description
Technical field
The invention belongs to the technical field of automobile electric control system, more particularly, the present invention relates to a kind of automobile electric appliance system based on fiber optic network.
Background technology
Traditional automobile electric control system is to using electrical wire that the metal example is made of such as copper as conduction and the connection of controlling signal.For example, there is the automobile that middle control computer arranges, each peripheral assembly for Accurate Control of Automotive, such as driving engine, driving system, brake system, suspension, doorframe, distribution, antitheft, safety air bag, reversing, amusement and navigation etc., need to the driver circuit of middle control computer and peripheral assembly, be connected by a large amount of metal electrical wires, each peripheral assembly transmits various electrical control signal, so that can work.
Yet, along with the develop rapidly of auto-industry, traditional take automotive electrical system that wire harness is main bind mode and have the following disadvantages practical operation is outstanding, main manifestations in the following areas: (1) wire harness even more complex is difficult to realize information sharing; Along with the increase of data communication quantity between electronic control unit, it is very important that high data transfer rates becomes, and common wire harness transfer rate can not meet the transmission of high speed data.(2) the easy oxidation of plain conductor and corrosion, and cause the line impedance value to increase, affect correct transmission or the connection of electric signal, and easily cause short circuit or spontaneous combustion, thus the potential safety hazard of existence.And adopt fiber optic network can overcome above-mentioned deficiency.
Fiber optic network is applied on high-grade car at present, and has withstood the test of time.As: " BMW7 " of Daimler-Chrysler (benz) " S level " series and BMW is etc.According to statistics, up to now, in Europe, there have been 16 vehicles to adopt optical fiber communication system.Yet in prior art, the automobile electric appliance system based on fiber optic network is with high costs, extendability also has much room for improvement.
Summary of the invention
In order to solve the above-mentioned technical matters existed in prior art, the object of the present invention is to provide a kind of automotive electrical system based on fiber optic network.Automotive electrical system of the present invention has advantages of that cost is low, reliability is high, favorable expandability; The bus architecture that this system adopts can meet the demand of development of automobile in present and following significant period of time.
The technical solution used in the present invention is as follows:
A kind of automotive electrical system based on fiber optic network, comprise the peripheral assembly of trunk optical fiber, sensor, light transmitting-receiving subassembly, gateway and automobile; It is characterized in that: the electric signal of described sensor measurement is connected with trunk optical fiber by the light transmitting-receiving subassembly, and passes through trunk optical fiber, and sends the peripheral assembly of automobile to by gateway and light transmitting-receiving subassembly.
Wherein, the peripheral assembly of described automobile comprises: Engine ECU, transmission system T CU, brake system ABS, light are controlled ECU, door and window is controlled ECU, distribution ECU, antitheft ECU, safety airbag ECU, reversing ECU, recreation terminal and navigation elements.
Wherein, described sensor comprises engine oil pressure sensing cell, electric power sensing unit, the anti-skidding sensing cell of front and back wheel, front and back wheel tire pressure sensing cell, front and back wheel brake feel measurement unit, anterior-posterior balance sensing cell, front rear shock sensing cell, vehicle interior temperature sensing cell, illumination sensing cell, safety air bag sensing cell, receiving wire sensing cell, emitting antenna sensing cell, sound equipment sensing cell, video sensing cell, electric door lock sensing cell etc.
Compared with prior art, the present invention has following beneficial effect:
(1) automotive electrical system of the present invention adopts plastic optical fiber as transmission medium, is equipped with the LED delivery module, with a main fiber, just can meet the car load application, thereby has greatly reduced the use of wire harness.And the highest communication of optic module can reach the 100m bandwidth, compatible CAN, LIN, FlexRay and MOST be in interior various communication protocols simultaneously, can the fast transport vision signal, met modern vehicle to the high speed of information, shared requirement.
(2) following traditional automobile mechanical system (as brake and control loop) will become the electric system be connected with High Performance ECU by the high speed fault-tolerant bus.Automotive electrical system based on fiber optic network provides a high speed between these systems, the secured communication channel that fault-tolerant and the time triggers.
(3) after the fiber optic network of bus architecture of the present invention is installed, wire harness will greatly be simplified, and it is very simple that maintenance will become, but the mode of operation of the accessory node that the operator can the real-time diagnosis car load by handheld terminal, and be directly targeted to module, got around the work of a large amount of wire harness investigation.
(4) after the fiber optic network of bus architecture of the present invention is installed, the parts upgrading will become simple, and because high speed information on fiber optic network is shared, parts substitute only needs to change module, without changing wire harness, this brings great convenience for the Full Vehicle System through engineering approaches.
(5) the plastic optical fiber manufacturing technology that the present invention uses is stable ripe, and feed stock cost is also relatively low, and therefore the fiber optic network automotive electrical system based on bus architecture of the present invention possesses very strong application and market outlook.
(6) the described automotive electrical system of the application, by trunk optical fiber transmission optics control signal, the problem that makes control path can avoid electric short circuit, electromagnetic interference and line degradation to melt down fully, and be conducive to lead the development of new auto technology, will produce long-range economic and social benefit.
The accompanying drawing explanation
The structured flowchart that Fig. 1 is the automotive electrical system based on fiber optic network of the present invention.
The specific embodiment
Below with reference to embodiment and accompanying drawing, electrolyser construction of the present invention is further elaborated.
Embodiment 1
As shown in Figure 1, the described automotive electrical system based on fiber optic network of the present embodiment adopts bus organization, take single trunk optical fiber as backbone network, and all sensors are realized sharing by backbone network, and each ECU is articulated on main line network by gateway.The system architecture of fiber optic network of the present invention has been used for reference the design concept of the GMLAN of AM General company, using the architecture for Open System Interconnection (OSI) of regulation as model, has set up an energy high speed, effective interconnected communication construction.According to the characteristics of auto communication, Physical layer, data link layer, network layer, transport layer, application layer have mainly been introduced; The automotive electrical system based on fiber optic network based on this model development, can meet the demand that in present and following certain hour, vehicle electrical systems is communicated by letter fully.
The automotive electrical system of the described fiber optic network of the present embodiment, except trunk optical fiber 10, also comprise sensor 20, described sensor can be a plurality of sensors that arrange respectively, it can be also the sensor with multiple detecting unit and purposes, for example in the present embodiment, described sensor is one or more, it has the detection engine oil pressure, electric power, front and back wheel is anti-skidding, the front and back wheel tire pressure, the front and back wheel brake, anterior-posterior balance, front rear shock, vehicle interior temperature, illumination, safety air bag, receiving wire, emitting antenna, the sound equipment sensing, the video sensing, the functions such as electric door lock sensing, for example, described sensor comprises engine oil pressure sensing cell, electric power sensing unit, the anti-skidding sensing cell of front and back wheel, front and back wheel tire pressure sensing cell, front and back wheel brake feel measurement unit, anterior-posterior balance sensing cell, front rear shock sensing cell, vehicle interior temperature sensing cell, illumination sensing cell, safety air bag sensing cell, receiving wire sensing cell, emitting antenna sensing cell, sound equipment sensing cell, video sensing cell, electric door lock sensing cell etc.Electric system of the present invention also comprises the light transmitting-receiving subassembly 030 that is converted into optical signal for detecting the electric signal obtained in addition; Comprise that in addition described gateway comprises power system gateway 40, chassis system gateway 50, electric system gateway 60, safety system gateway 70, corollary system gateway 80 for optical signal being passed to the gateway of each peripheral assembly.Wherein, the peripheral assembly of described automobile comprises: Engine ECU, transmission system T CU, brake system ABS, light are controlled ECU, door and window is controlled ECU, distribution ECU, antitheft ECU, safety airbag ECU, reversing ECU, recreation terminal and navigation elements.Wherein, the power system gateway is connected with Engine ECU, transmission system T CU and brake system ABS respectively by the light transmitting-receiving subassembly; The chassis system gateway is connected with suspension system ECAS by the light transmitting-receiving subassembly; The electric system gateway is controlled ECU and is connected with distribution ECU by light transmitting-receiving subassembly and light control ECU, door and window; The safety system gateway is by light transmitting-receiving subassembly and antitheft ECU, safety airbag ECU and reversing ECU; The corollary system gateway is connected with recreation terminal and navigation elements by the light transmitting-receiving subassembly.
In the present embodiment, described smooth transmitting-receiving subassembly sends and the photoelectricity reception for the electric light of settling signal.In order to take full advantage of the bandwidth of optical cable, greatly meet the requirement that multi-path signal transmits simultaneously, usually adopt multiplexed type of transmission, wavelength of transmitted light is 600nm-1000nm, transmission distance can reach several Km, and working temperature range is-40 ℃～+ 105 ℃, applicable 50/125 μ m, 62.5/125 μ m, 200 μ mHCS optical fiber and the multiple connectors such as ST, SC, SMA and FC.Described optical transceiver comprises optical transmitting set and optical receiving set in the present embodiment, the aluminum gallium arsenide optical transmitting set that described optical transmitting set is the efficiency light power drive, this optical transmitting set can be to the luminous power (12dBm) of optical fiber feed-in corresponding light wavelength under 20mA～200mA continuous current excitation; Optical receiving set is by an efficient HM photodiode and a low noise transimpedance preamplifier the electric circuit constitute, optical signal becomes analog electrical signal through photodiode converts, after amplification, by the emitter-follower Buffer output, maximum dynamic range reaches 30dB, and frequency response is from the direct current to 125MHz.
The plastic optical fiber flexible cord, when its for automobile in during communications patching, usually can crookedly under hot and humid environment under the state in narrow space, be used, so must possess resistance to effect of heat, moisture-proof, resistance to bend(ing).Especially the ceiling in automobile, the distribution in engine room, ambient temperature is about 100 ℃, therefore need to be provided under 100-105 ℃ of hot conditions the plastic optical fiber flexible cord of long-term heat resistance.At the described trunk fiber of the present embodiment, it is plastic optical fiber, described plastic optical fiber has core and clad material: described sandwich layer is polymethyl methacrylate (PMMA, ratio of refraction is 1.49), described clad material (ratio of refraction is 1.33) is prepared 220-235 ℃ of reaction by following raw material, described raw material comprises the MDI of 30-35 weight portion, the PTMG of 25-30 weight portion, 1 of 3-5 weight portion, the 4-butylene glycols, 0.2-0.3 the dibutyl tin laurate of weight portion, 0.3-05 weight portion to dihydroxy benaophenonel, the N-caprolactam of 1-2 weight portion, the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer of 8-10 weight portion, the 2-methyl isophthalic acid of 2-3 weight portion-vinyl Gan Evil quinoline.Then the clad material prepared is supplied with to composite spinning machine, and supply with to composite spinning machine polymethyl methacrylate as core material, at the temperature of 230 ℃, core material and clad material are carried out to the composite molten spinning, obtain described plastic optical fiber.The described plastic optical fiber continuous bend of the present embodiment number of times can reach 8-10 ten thousand times, and resistance to effect of heat is that 0.5-0.8dB, bending loses are 0.3-0.5dB, and retractility is the 0.4mm left and right.With the perfluor plastic polymer of high price, compare, plastic optical fiber of the present invention not only has excellent heat-resisting and resistance to bend(ing) energy, and price is also relatively low.
Wherein, the test method appendix of above-mentioned plastic optical fiber performance is as follows:
Continuous bend
Apply the load of 500g at an end of plastic optical fiber, the plug that is 30mm with diameter supports, centered by this strong point by the other end of plastic optical fiber with 90 ° of continuous bend of angle, the number of times while being measured to cord break.
Resistance to effect of heat
In high temperature oven, the plastic optical fiber flexible cord of 22 meters of specimen lengths (two ends each 2 meters baking oven outside) to be placed 1000 hours at the temperature of 105 ℃, the light quantity of determination test front and back, using this variable quantity as index.
Bending loses:
The use wavelength is the 660nm light-emitting diode, measures the light quantity of the plastic optical fiber flexible cord of 3 meters of specimen lengths.Mensuration, by this plastic optical fiber cord wrap 360 light quantities while spending on the rod of metal-made radius 10mm, is measured the light quantity reduction caused due to coiling.
Retractility:
The plastic optical fiber flexible cord of specimen length 50cm is put in the high temperature oven at the temperature of 105 ℃ 24 hours, utilized the flexible cord end face portion of the plastic optical fiber flexible cord before and after the microscopic examination test.The situation of stretching out from the coating top at plastic optical fiber, from the coating top to the length on the plastic optical fiber top of stretching out, being telescopic section, is negative value.At plastic optical fiber, from the situation of coating top retraction, the length on the top of the plastic optical fiber from the coating top to retraction is telescopic section, on the occasion of.
Although the present invention elaborates technical scheme of the present invention by embodiment, but those of ordinary skill in the art is to be understood that can be without departing from the scope of the present disclosure, can adopt to be equal to and replace or the equivalent transformation form is implemented the present invention.Therefore, protection scope of the present invention is not limited to the specific embodiment of specific embodiment part, as long as no the embodiment that breaks away from invention essence, within all being interpreted as having dropped on the protection domain of requirement of the present invention.
Claims (7)
1. the automotive electrical system based on fiber optic network, comprise the peripheral assembly of trunk optical fiber, sensor, light transmitting-receiving subassembly, gateway and automobile; It is characterized in that: the electric signal of described sensor measurement is connected with trunk optical fiber by the light transmitting-receiving subassembly, and passes through trunk optical fiber, and sends the peripheral assembly of automobile to by gateway and light transmitting-receiving subassembly.
2. the automotive electrical system based on fiber optic network according to claim 1, is characterized in that the peripheral assembly of described automobile comprises: Engine ECU, transmission system T CU, brake system ABS, light control ECU, door and window control ECU, distribution ECU, antitheft ECU, safety airbag ECU, reversing ECU, recreation terminal and navigation elements.
3. the automotive electrical system based on fiber optic network according to claim 1, is characterized in that described sensor comprises engine oil pressure sensing cell, electric power sensing unit, the anti-skidding sensing cell of front and back wheel, front and back wheel tire pressure sensing cell, front and back wheel brake feel measurement unit, anterior-posterior balance sensing cell, front rear shock sensing cell, vehicle interior temperature sensing cell, illumination sensing cell, safety air bag sensing cell, receiving wire sensing cell, emitting antenna sensing cell, sound equipment sensing cell, video sensing cell and electric door lock sensing cell.
4. the automotive electrical system based on fiber optic network according to claim 1, it is characterized in that described gateway is connected with trunk optical fiber, and it comprises power system gateway, chassis system gateway, electric system gateway, safety system gateway and corollary system gateway; Described power system gateway is connected with Engine ECU, transmission system T CU and brake system ABS respectively by the light transmitting-receiving subassembly; Described chassis system gateway is connected with suspension system ECAS by the light transmitting-receiving subassembly; Described electric system gateway is controlled ECU and is connected with distribution ECU by light transmitting-receiving subassembly and light control ECU, door and window; Described safety system gateway is by light transmitting-receiving subassembly and antitheft ECU, safety airbag ECU and reversing ECU; Described corollary system gateway is connected with recreation terminal and navigation elements by the light transmitting-receiving subassembly.
5. the automotive electrical system based on fiber optic network according to claim 1, is characterized in that described optical transceiver comprises optical transmitting set and optical receiving set, the aluminum gallium arsenide optical transmitting set that described optical transmitting set is the efficiency light power drive; Described optical receiving set is by an efficient HM photodiode and a low noise transimpedance preamplifier the electric circuit constitute, and optical signal becomes analog electrical signal through photodiode converts, after amplification by the emitter-follower Buffer output.
6. according to the described automotive electrical system based on fiber optic network of claim 1-5 any one, it is characterized in that the trunk fiber is plastic optical fiber.
7. the automotive electrical system based on fiber optic network according to claim 6, it is characterized in that described plastic optical fiber has core and clad material: described sandwich layer is polymethyl methacrylate, and described clad material is prepared 220-235 ℃ of reaction by following raw material; Described raw material comprises the MDI of 30-35 weight portion, the PTMG of 25-30 weight portion, the BDO of 3-5 weight portion, the dibutyl tin laurate of 0.2-0.3 weight portion, the N-caprolactam to dihydroxy benaophenonel, 1-2 weight portion of 0.3-05 weight portion, the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer of 8-10 weight portion, the sweet Evil quinoline of 2-methyl isophthalic acid-vinyl of 2-3 weight portion.
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| CN201310330444.7A CN103434461B (en) | 2013-08-01 | 2013-08-01 | Automotive electrical system based on fiber optic network |
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| CN201310330444.7A CN103434461B (en) | 2013-08-01 | 2013-08-01 | Automotive electrical system based on fiber optic network |
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| CN104724007A (en) * | 2015-01-28 | 2015-06-24 | 长城汽车股份有限公司 | Automobile network system and automobile |
| US10148348B2 (en) | 2015-07-17 | 2018-12-04 | Corning Optical Communications LLC | Optical-electrical interface devices and systems with optical communication pathway redundancy |
| CN109484332A (en) * | 2017-09-11 | 2019-03-19 | 株式会社万都 | Comprehensive ECU |
| CN110103858A (en) * | 2019-05-10 | 2019-08-09 | 联陆智能交通科技(上海)有限公司 | Automotive electronics ECU and sensor connection and method |
| CN111466104A (en) * | 2017-12-07 | 2020-07-28 | 住友电气工业株式会社 | Vehicle-mounted communication system |
| WO2021128718A1 (en) * | 2019-12-26 | 2021-07-01 | 北京国科天迅科技有限公司 | In-vehicle ethernet architecture compatible with tsn and having fc protocol introduced |
| CN113459971A (en) * | 2021-06-27 | 2021-10-01 | 深圳新联胜光电科技有限公司 | Vehicle driving data acquisition method and system |
| CN114658544A (en) * | 2022-04-01 | 2022-06-24 | 潍柴动力股份有限公司 | Engine controller and engine signal transmission system based on engine controller |
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