CN203580750U - Car lamp control system based on CAN bus - Google Patents
Car lamp control system based on CAN bus Download PDFInfo
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- CN203580750U CN203580750U CN201320623540.6U CN201320623540U CN203580750U CN 203580750 U CN203580750 U CN 203580750U CN 201320623540 U CN201320623540 U CN 201320623540U CN 203580750 U CN203580750 U CN 203580750U
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Abstract
The utility model discloses a car lamp control system based on a CAN bus. The car lamp control system based on the CAN bus comprises a control module, a left front module, a left rear module, a right front module, a right rear module and a car interior lighting module which are connected with the CAN bus respectively, wherein the control module is connected with lamp control equipment and controls the CAN bus to send out lamp control signals to the left front module, the left rear module, the right front module, the right rear module and the car interior lighting module, and the left front module, the left rear module, the right front module, the right rear module and the car interior lighting module are connected with a left front lamp set, a left rear lamp set, a right front lamp set, a right rear lamp set and a car interior lamp set respectively. The car lamp control system based on the CAN bus controls the car lamps through the CAN bus and effectively improves the reliability of control over the car lamps.
Description
Technical field
The utility model relates to automobile lamp control technology field, relates in particular to a kind of car lamp control system based on CAN bus.
Background technology
CAN (Controller Area Network) is to be a kind of vehicle-mounted dedicated serial data communication bus of auto-domain exploitation early 1980s, meet the requirement of SAE (Society of Automobile Engineer) to C class high speed In-vehicle networking (≤1Mb/s), be applicable to communication and the control of power transmission and chassis electronic system, be therefore also applicable to communication and the control of general in-vehicle electronic system.
At present car lamp control system is not yet controlled by CAN bussing technique, but controls by independently wire harness, control unit, has virtually reduced the reliability of vehicle electric information system.
Utility model content
Technical problem to be solved in the utility model is to realize the system that a kind of CAN of utilization bus is carried out car light control.
To achieve these goals, the technical solution adopted in the utility model is: a kind of car lamp control system based on CAN bus, system comprises the control module being connected with CAN bus respectively, left front module, left back module, right front module, right back module and room light module, described control module is connected with light control device and by CAN bus front module left, left back module, right front module, right back module and room light module are sent lamp control signal, described left front module, left back module, right front module, right back module and room light module are respectively with left front, left back, right front, right backly be connected with interior light group.
Described left front module, left back module, right front module, right back module and room light module are connected with CAN bus by Intel82527CAN bus controller.
Described Intel82527CAN bus controller is worked through 8051 Micro Controller Unit (MCU) driving light fixtures.
Described CAN bus transceiver and Physical layer bus interface are selected the PCA82C250 of Philips company.
The utility model has the advantage of that native system controls car light by CAN bus, have the following advantages: 1, adopt non-destructive arbitration technique, obtain the preferential node of arbitration and will continue message transfer, message can or not make a mistake by another destruction of a node; 2, CAN bus adopts short frame structure, and the valid data of each frame are 8 bytes, and data transmission period is short, and the probability being disturbed is low, and the time resending is short; 3, the every frame data of CAN adopt CRC(Cyclic Redundancy Check) verification, guaranteed to be suitable for the high reliability of data transmission using in high-interference environment; 4, CAN adopts the differential signal transmission data of balance, and when traffic rate is 5kb/s, direct communication distance can reach 10km farthest, and when communication distance is 40m, traffic rate reaches as high as 1Mb/s, can form a cancellation effect; 5, can avoid the laying that repeats of automotive wire bundle, effectively reduce the quantity of wire harness on automobile, improve reliability, reduce cost.Therefore, utilize CAN bus to carry out lamp system design, can promote automotive performance.
Accompanying drawing explanation
Below the content of every width accompanying drawing expression in the utility model specification sheets and the mark in figure are briefly described:
Fig. 1 vehicle light illumination, signal system;
Fig. 2 CAN bus lamp system structure;
Fig. 3 system hardware structure figure;
Fig. 4 is every implication in data;
Fig. 5 main program flow chart.
The specific embodiment
As shown in Figure 1, vehicle light illumination, signal system, by throwing light on and signal lamp group forms, comprise head light (country beam, passing light), steering indicating light, fog lamp, brake lamp, ceiling light, position lamp, backing-up lamp and registration mark light etc., the function of variety classes car light is different, and installation site is also not quite similar.By car light riding position, can be divided into left front, left back, right front, right back 4 groups of illuminations and signal lamp group, and room light lamp group, therefore control module, left front module, left back module, right front module, right back module and room light module can be set in CAN communication network, totally 6 nodes, its lamp system constructional drawing as shown in Figure 2.Wherein, the monitoring that control module passes through on off state to change is to other 5 module sending controling instructions, and these 5 modules, after receiving the control command that belongs to this module, are controlled respectively the car light action of correspondence position.Because CAN is the Event triggered agreement based on priority, according to other difference of driving safety level, in system, the priority of each node will be set successively.It is emphasized that switch control module is system control command sending module, security requirement is the highest, has limit priority, and left back and right back module relates to braking and waits the car light relevant to driving safety, and its priority is only second to switch control module.
It is that core forms intelligent node that the present embodiment be take 8051 micro controller systems and Intel82527CAN bus controller.Wherein, Intel82527CAN controller is supported CAN2.0 standard, comprises standard and data and remote frame expansion, program-controlled global barrier; Comprise standard and extend information identifier, have 15 message buffers, each data length is 8 bytes; 14 TX/RX buffer zones, 1 RX buffer zone with program-controlled shielding; Variable C PU interface, has 8 buses of multichannel (Intel or Motorola mode), 16 buses of multichannel, 8 non-multiple bus (synchronous/asynchronous) and serial interface; Bit rate is program-controlled, and has program-controlled clock output; Variable interrupt structure; Can arrange output driver and input comparator structure; 28 two-way I/O mouths; 44 pin PLCC encapsulation.
It is CAN bus transceiver and Physical layer bus interface that the present embodiment is selected the PCA82C250 of Philips company, it can provide difference sending and receiving, high speed slope to bus to control and 3 kinds of different operating modes of standby, can isolate glitch, improve and receive and transmittability.In hardware design, 82527 complete the information exchange with CAN bus, and 8051 complete the driving to car light relay; Bypass input comparator, adopts interrupt mode with 8051 information exchange, and address is 7F00～7FFFH.System hardware structure as shown in Figure 3.
CAN2.0B agreement has only been formulated the agreement of CAN Physical layer and data link layer, when carrying out system, must formulate corresponding CAN application layer protocol according to user's needs.According to each node of bus system and the function that will realize thereof, determine shared data each other, then understand the information that each node need receive and send, the unified information that needs transmission in CAN network of formulating, finally gives the CAN Internet Transmission message distribution marker making.CAN agreement regulation, identifier ID is less, and preceence is higher, therefore, when determining ID, first will analyze the emergency of this information frame demand.
Automobile lamp position distribution and driving safety are required to the foundation as each Module Division, and take control module, left back module, right back module, left front module, right front module, intraoral illumination module is order-assigned ID.
Information coding is that close or relevant information combination is become to a block data, and their data can be sent to bus from controlling node by same frequency.Other CAN node can obtain this group information simultaneously, and this information is processed accordingly.This car lamp control system sends information by master controller, and each partial node first receives by examination/shielding filter the information oneself needing, shielding N/R information, then carry out corresponding operating according to receiving content.Wherein 4 partial nodes are all set to single filtering, and in the 1B data that master controller sends, everybody implication is shown in and in Fig. 4, shows data.
The utility model adopts modularized program design philosophy design software, according to function, is divided into different program modules, and each intermodule is relatively independent to complete specific function, mainly comprises that CAN node initializing, message receive, message sends and data processing module., between module and module, can mutually call, data sharing, to reach the object of recycling code and simplified code meanwhile.Its main program flow chart as shown in Figure 5.
Press the hardware and software design plan that the present embodiment is introduced, at test cell, complete car lamp control system, be combined into car light stand, by the debugging repeatedly to this system hardware, software, carry out Control experiment.Rig test result proves, the design plan of this car lamp control system is feasible, has reduced the use of wire harness, and dependable performance, has good future in engineering applications.Also can predict thus, along with CAN bus is in the widespread use aspect auto electric control, the aspects such as the usability of automobile and reliability also will be greatly improved.
Claims (4)
1. the car lamp control system based on CAN bus, it is characterized in that: system comprises the control module being connected with CAN bus respectively, left front module, left back module, right front module, right back module and room light module, described control module be connected with light control device and by CAN bus left front module, left back module, right front module, right back module and room light module send lamp control signal, described left front module, left back module, right front module, right back module and room light module are connected with interior light group with left front, left back, right front, right back respectively.
2. the car lamp control system based on CAN bus according to claim 1, is characterized in that: described left front module, left back module, right front module, right back module and room light module are connected with CAN bus by Intel82527CAN bus controller.
3. the car lamp control system based on CAN bus according to claim 2, is characterized in that: described Intel82527CAN bus controller is worked through 8051 Micro Controller Unit (MCU) driving light fixtures.
4. the car lamp control system based on CAN bus according to claim 3, is characterized in that: described CAN bus transceiver and Physical layer bus interface are selected the PCA82C250 of Philips company.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320623540.6U CN203580750U (en) | 2013-10-10 | 2013-10-10 | Car lamp control system based on CAN bus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320623540.6U CN203580750U (en) | 2013-10-10 | 2013-10-10 | Car lamp control system based on CAN bus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216360A (en) * | 2014-08-06 | 2014-12-17 | 北京航天发射技术研究所 | Universal method for synchronously controlling multiple controlled objects |
| CN108515901A (en) * | 2018-03-28 | 2018-09-11 | 北京经纬恒润科技有限公司 | A kind of adaptive lighting control system and control method |
-
2013
- 2013-10-10 CN CN201320623540.6U patent/CN203580750U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216360A (en) * | 2014-08-06 | 2014-12-17 | 北京航天发射技术研究所 | Universal method for synchronously controlling multiple controlled objects |
| CN104216360B (en) * | 2014-08-06 | 2017-09-08 | 北京航天发射技术研究所 | Realize the universal method of many control object Synchronization Controls |
| CN108515901A (en) * | 2018-03-28 | 2018-09-11 | 北京经纬恒润科技有限公司 | A kind of adaptive lighting control system and control method |
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