Rainfall sensor detection platform based on LIN (Local Interconnect Network) bus and detection method thereof

A rain sensor and detection platform technology, applied in bus network, vehicle testing, rainfall/precipitation meter, etc., to improve detection quality and production efficiency

Inactive Publication Date: 2011-10-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the current evaluation system can only collect data from the old-fashioned 12V pulse rain sensor and wiper motor
It can't do anything about the rain sensor with LIN bus in today's higher-end cars

Method used

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  • Rainfall sensor detection platform based on LIN (Local Interconnect Network) bus and detection method thereof
  • Rainfall sensor detection platform based on LIN (Local Interconnect Network) bus and detection method thereof
  • Rainfall sensor detection platform based on LIN (Local Interconnect Network) bus and detection method thereof

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Embodiment Construction

[0021] Below with reference to accompanying drawing, describe in further detail.

[0022] The present invention consists of the following modules: LIN rain sensor (LIN slave node), LIN wiper motor (LIN slave node), LIN interface chip, MCS12 microcontroller (LIN master node), USB interface chip, PC terminal application program ,like figure 1 shown.

[0023] The function and circuit composition of each component of the evaluation system:

[0024] (1) Rain sensor and wiper motor

[0025] The difference between the LIN rain sensor and the ordinary rain sensor is that it can temporarily store the rain information in its own buffer to form the data bytes in the LIN slave task. It can reflect not only rainfall information but also other parameters such as light intensity and humidity. The LIN wiper motor is to form information such as wiper speed into data bytes from the task.

[0026] The LIN rain sensor and wiper motor can work in different modes, perform standard detection on...

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Abstract

The invention discloses a rainfall sensor detection platform based on an LIN (Local Interconnect Network) bus and a detection method thereof, which belongs to a car part detection system. A current evaluation system only collects data of old 12V pulse type rainfall sensors and wiper motors, and is powerless to current higher-grade cars with the LIN (Local Interconnect Network) bus. A wiper system based on an LIN protocol is used as a signal source; an MC9S12D64 chip is selected as a core to form a main LIN node of an embedded system and is connected by a USB (universal series bus) to form an upper-lower computer information transmission system consisting of computers and the embedded system; and the data parameter collection, comparison and display are completed under the assist of computer terminal applications. The production quality of sensors and motors can be directly judged by comparing data values fed back by the computer terminal applications with standard data curves, thereby providing supports for the full automation of the detection platform.

Description

technical field [0001] The invention belongs to an automobile component detection system, in particular to a rain sensor detection based on a LIN bus. Background technique [0002] Nowadays, in order to reduce the wiring harness of automobile body, field bus technology has been widely used in body electronic control system. Among them, the LIN bus is a multiplexing serial protocol for low-end communication that has emerged in recent years. It is mainly used in occasions with low speed requirements, such as car doors, steering wheels, seats, car windows, wipers, etc. For cost sensitive units. By using the LIN bus, the cost can be greatly saved, the wiring cost can be reduced, and the maintainability and intelligence level can be improved. But the current evaluation system can only collect data from the old-fashioned 12V pulse rain sensor and wiper motor. There is nothing that can be done about the rain sensor with LIN bus in today's higher-end cars. In order to adapt to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/14G01M17/007H04L12/40
Inventor 姜义成范振姜博
Owner HARBIN INST OF TECH
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