Data acquisition and fault diagnosis terminal for vehicle

Abstract

The invention discloses a data acquisition and fault diagnosis terminal for a vehicle. The terminal comprises a power management unit, an SCM (single chip machine) core control unit, a clock unit, a voice unit, a storage unit, a push-button unit, an LCD (liquid crystal display) unit and an interface unit. The terminal adopts a CAN bus and a K-line to carry out data acquisition in the vehicle, and an IO(input-output) interface is reserved to acquire the signals acquired by the CAN bus and the K line so as to enable a controller to acquire more useful signals in the vehicle. The acquired data can be stored by an SD (secure digital) card or USB (universal serial bus), and also can be transmitted to a remote server through 3G (3rd generation telecommunication) / GPRS (general packet radio service) in real time to be stored so as to realize the large capacity data storage. The terminal can automatically recognize engine types or part types of a plurality of companies. A tester can transmit GPS (global positioning system) positioning information back through a GPRS wireless communication unit arranged in the terminal so as to monitor road test conditions in real time by a far-end server.

Description

technical field [0001] The invention relates to a vehicle data acquisition and fault diagnosis equipment, which is used to obtain the output of various on-board sensors installed in the vehicle from the OBD-II (On-Board Diagnosis-II, second-generation on-board diagnostic system) interface of the vehicle Data and vehicle fault code data, and send road test data to the remote server in real time. Background technique [0002] There are many deficiencies in the existing vehicle data collection terminals. First of all, most of the traditional vehicle-mounted terminals use external sensors to collect data in the vehicle, which leads to complicated and cumbersome installation and messy vehicle wiring harness. [0003] Chinese patent CN 2864823 Y discloses a vehicle data recorder. The recorder uses Flash Memory (flash memory), which can only record 16M data, and the storage capacity is small, which cannot meet the needs. [0004] The diagnostic range of traditional on-board diagn...

AI Technical Summary

Problems solved by technology

First of all, most of the traditional vehicle-mounted terminals use external sensors to collect data in the vehicle, which leads to complicated and cumbersome installation and messy vehicle wiring harness.

[0003] Chinese patent CN 2864823 Y discloses a vehicle data recorder, the recorder uses Flash Memory (flash memory), can only record 16M data, the storage capacity is small, and cannot meet the needs

[0005] Traditional on-board road test monitoring equipment is difficult to monitor in real time whether the driver's operation during the road test meets the specification requirements

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