CN102314171A

CN102314171A - Parameter matching calibration tool based on CAN (Controller Area Network) bus

Info

Publication number: CN102314171A
Application number: CN201110110783A
Authority: CN
Inventors: 张后亮; 毛林章; 李渔; 朴昌浩; 肖利华
Original assignee: Chongqing Changan Automobile Co Ltd; Chongqing Changan New Energy Automobile Co Ltd; Chongqing Jinmei Communication Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd; Chongqing Changan New Energy Automobile Co Ltd; Chongqing Jinmei Communication Co Ltd
Priority date: 2011-04-29
Filing date: 2011-04-29
Publication date: 2012-01-11
Anticipated expiration: 2031-04-29
Also published as: CN102314171B

Abstract

The invention provides a parameter matching calibration tool based on a CAN (Controller Area Network) bus, which is a USB (Universal Serial Bus) bus adapter based on a microcontroller and comprises a microcontroller module, a CAN bus controller module, a CAN transceiver module, a digital isolator module and an isolating power supply module, wherein a USB controller is arranged in the microcontroller module; data transmission between a PC (Personal Computer) and a CAN bus is realized; the microcontroller adopts a 8-bit single-chip microcomputer; a power supply provided by a USB socket directly supplies power to the microcontroller and the CAN bus controller; the CAN bus controller and the CAN bus socket are connected by a digital isolating device and a CAN data transceiver; and the power is supplied to the digital isolating device and the CAN data transceiver by a DC/DC (Direct Current) power supply converter. According to the parameter matching calibration tool provided by the invention, equipment on the CAN bus can be monitored, and the microcontroller controls the data to be transmitted between the USB socket and the CAN bus.

Description

Parameter matching calibration tool based on the CAN bus

Technical field

The invention belongs to hybrid power automobile controller parameter calibration field, particularly a kind of parameter matching calibration tool based on the CAN bus.

Background technology

CAN (Controller Area Network) bus is as a kind of many main frames localized network fieldbus, because the dirigibility of its networking has received application widely with convenience, the high efficiency of communicating by letter and reliability and less cost in the controller parameter demarcation field of hybrid vehicle.Modern automobile automatic control had both needed " decentralised control ", more need effectively " centralized management ", with safety and the efficient that guarantees that electrokinetic cell uses.

USB changes the CAN adapter is being undertaken data transmission between monitoring unit and the slave computer node in the measurement and control network that the CAN bus is formed vital task.Utilize usb bus technical support hot plug, be prone to expansion, speed is fast, and in WIN98 or above operating system, all supports characteristics such as USB interface, improves traffic rate, installation and maintenance are simple and convenient, have broad application prospects in the control field.

Summary of the invention

The object of the present invention is to provide a kind of parameter matching calibration tool based on the CAN bus, can be used for the equipment on the CAN bus is monitored, the microprocessor controls data are transmitted between USB socket and CAN bus.

For achieving the above object, the present invention adopts following technical proposals:

A kind of parameter matching calibration tool based on the CAN bus, it is connected described USB socket and CAN EBI by a microcontroller (including the USB controller) with a CAN bus controller, realizes data transmission between PC and the CAN bus.Specifically form by the micro controller module that includes the USB controller, CAN bus controller module, CAN transceiver module, digital isolator module and insulating power supply module.

Above-mentioned micro controller module adopts 8 single-chip microcomputers.In USB-CAN bus adapter, utilize power supply that the USB socket provides directly to micro controller module and CAN bus controller module for power supply based on microcontroller; Between CAN bus controller module and CAN EBI, adopt digital isolator module and CAN data collector module to realize being connected, and adopt a DC/DC supply convertor to give digital isolator module and the power supply of CAN transceiver module.

In above-mentioned parameter matching calibration tool based on the CAN bus, be connected a usb bus pilot lamp between 14 pins of microcontroller and the ground, be connected a USB electromotion pilot lamp between usb 1 pin and the ground.

The present invention has following remarkable advantage compared with prior art:

The present invention substitutes traditional light-coupled isolation device with digital isolator spare, has realized the internodal electrical isolation of each CAN on the bus, has reduced system power dissipation, has simplified system architecture, has strengthened system stability, has improved the performance of system.This calibration tool is supported CAN2.0B, and bit rate can reach 1Mbps and data transmission credibility is high; Clock frequency is up to 24MHz; Support interface with different microprocessors; The programmable can drive arrangements; Operating temperature range is wide to reach-40 ~ 85 ℃; Wide input voltage range: 2:1; Isolation voltage 1500VDC; Short-circuit protection (recovering certainly).

Description of drawings

Fig. 1 is based on the parameter matching calibration tool structured flowchart of CAN bus;

Fig. 2 is based on the micro-controller communications principle schematic of the parameter matching calibration tool of CAN bus;

Fig. 3 is based on the CAN bus micro-controller communications principle schematic of the parameter matching calibration tool of CAN bus.

Embodiment

Parameter matching calibration tool based on the CAN bus comprises following hardware and software.

Fig. 1 is based on the parameter matching calibration tool structured flowchart of CAN bus: comprise 8 single-chip microcomputers of microcontroller, DC/DC power module, CAN bus controller, digital isolator, CAN transceiver.Hinge and usb bus Node Controller that 8 single-chip microcomputers of microcontroller are total systems; The CAN bus controller is an independent CAN bus controller in the field of industrial automatic control; DC/DC power module, digital isolator, CAN transceiver are the system supplymentary circuit, and PC can carry out observing and controlling to the equipment of CAN bus through the USB socket.

The transmitting-receiving of CAN bus data is accomplished by the CAN bus transceiver.The control of agreement and data processing are accomplished by microcontroller and CAN transceiver.

Fig. 2 is based on the parameter matching calibration tool micro-controller communications principle schematic of CAN bus: USB interface is returned microcontroller and the CAN bus controller is directly supplied power except that carrying out data communication.Can carry out the two-way communication of 8 bit data between microcontroller and the CAN bus controller.Microcontroller is sent out the bus controller to CAN with control signal.External crystal-controlled oscillation is that microcontroller provides clock signal.Red led is used for pointing out electric power thus supplied, and green indicating lamp is used for pointing out signal intelligence.

Fig. 3 is based on the CAN bus micro-controller communications principle schematic of the parameter matching calibration tool of CAN bus: the CAN bus controller and the communication line of CAN transceiver between added a digital isolator, realize electrical isolation, enhance system stability.DC/DC is the WV that the voltage transitions that the USB socket provides is become digital isolator and CAN transceiver, supplies its work.

Claims

1. parameter matching calibration tool based on the CAN bus; It is characterized in that: said parameter matching calibration tool is made up of the micro controller module that includes the USB controller, CAN bus controller module, CAN transceiver module, digital isolator module and insulating power supply module, realizes data transmission between PC and the CAN bus; Said micro controller module adopts 8 single-chip microcomputers; Utilize power supply that the USB socket provides directly to micro controller module and CAN bus controller module for power supply; Carry out the two-way communication of 8 bit data between micro controller module and the CAN bus controller module; Micro controller module sends out control signal to CAN bus controller module, and external crystal-controlled oscillation is that micro controller module provides clock signal; Between CAN bus controller module and CAN EBI, adopt digital isolator module and CAN transceiver module to realize being connected, and adopt an insulating power supply module to give digital isolator module and the power supply of CAN transceiver module.

2. the parameter matching calibration tool based on the CAN bus according to claim 1 is characterized in that: be connected a usb bus pilot lamp between 14 pins of micro controller module and the ground, be connected a USB electromotion pilot lamp between usb 1 pin and the ground.

3. the parameter matching calibration tool based on the CAN bus according to claim 1 and 2; It is characterized in that: said insulating power supply module adopts the DC/DC supply convertor; The voltage transitions that the USB socket is provided becomes the WV of digital isolation module and CAN transceiver module, supplies its work.