Bus adapter of car running recorder CAN

A technology of CAN bus and driving recorder, which is applied in the field of CAN bus adapter of vehicle driving recorder, can solve the problems that have not been officially recognized by the state, CAN bus resources cannot be formally applied to vehicle driving recorder, etc.

Inactive Publication Date: 2007-02-21
杭州中导科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the car travel recorder that can be connected to the CAN bus has no corresponding national standard as a basis, and has not yet been officially recogn

Method used

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  • Bus adapter of car running recorder CAN
  • Bus adapter of car running recorder CAN
  • Bus adapter of car running recorder CAN

Examples

Experimental program
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Embodiment approach

[0024] In the figure, Can1 and Can2 are two signal lines of the CAN bus, and the relative voltage of Can1 is higher than that of Can2; the CanH and CanL adapters correspond to the two signal lines of Can1 and Can2, correspondingly, the relative voltage of CanH is higher than that of CanL. like figure 1 The CAN bus adapter of the car driving recorder shown in the figure, the CAN bus interface 1 connected to the car CAN bus generally adopts a four-core socket, and the two signal CanH and CanL lines of the CAN bus interface 1 are sequentially connected to set the CAN transceiver 2 and the CAN controller 3 , CAN transceiver 2 is the bottom transceiver chip of the CAN bus, currently commonly used models are PCA82C250, PCA82C251, TJA1040, TJA1041, TJA1050, TJA1054, SN65HVD1050, etc., an interface protection circuit is set between CAN transceiver 2 and CAN bus interface 1 to prevent The external accidental high voltage damages the internal circuit. The CAN controller 3 is a separate ...

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Abstract

The invention features the following: the CAN bus interface for connecting the CAN bus of vehicle has two signal wires each respectively connected to the CAN transceiver and CAN controller; the data port of the CAN controller is connected to a MPU; the MPU is connected to the signal transmission port. The CAN bus adapter thereof can translates all data collected from CAN bus into the general vehicle signals and outputs them such that the general vehicle traveling data recorder can receives and utilize the signals transmitted on CAN bus.

Description

technical field [0001] The invention belongs to the technical field of automobile electronics, and in particular relates to a CAN bus adapter for an automobile driving recorder. Background technique [0002] Car driving recorder (commonly known as car black box) can record, save and output information such as vehicle speed, time, mileage and driving operation; it can query or print the final driving condition on the spot, or reproduce the entire driving process through data analysis software It can also remind the driver in time to slow down or take a break. Its role includes improving the driver's safety awareness, effectively preventing accidents, providing evidence for law enforcement officers' accident handling, and facilitating the internal management of transportation companies. [0003] With the continuous development of automotive electronics technology, the number of various electronic control units in the car is increasing, and the connectin...

Claims

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Application Information

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IPC IPC(8): H04L29/00H04L12/40H04L29/08
Inventor 钱雄
Owner 杭州中导科技开发有限公司
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