Vehicle-mounted automatic diagnostic system and terminal as well as transmission method of GPS positioning data

Abstract

The invention discloses a vehicle-mounted automatic diagnostic system and a vehicle-mounted automatic diagnostic terminal. A gyroscope sensor and an AGPS chip are additionally arranged; by combining the gyroscope sensor and an acceleration sensor, full motion of a three-dimensional space can be tracked and captured well, and user use experience having a strong scene feeling and an accurate navigation system are provided for a final user, particularly, the sudden turning of vehicles can be judged more accurately. The AGPS chip can cooperate with a traditional GPS satellite by utilizing information of a mobile phone base station, so that the positioning speed is relatively high. According to the transmission method of the GPS positioning data provided by the invention, a GPS positioning data frame is converted into an integer frame, and differential encoding on the integer frame is carried out, so that a storage space of the GPS positioning data can be effectively reduced, the data throughput is reduced, and the data transmission velocity is greatly increased, thus obviously shortening the vehicle positioning time.

Description

Technical field [0001] The invention belongs to the field of vehicle monitoring, in particular to a vehicle-mounted automatic diagnosis system and a terminal and a method for transmitting GPS positioning data. Background technique [0002] OBD (On Board Diagnostics, on-board automatic diagnosis system) can monitor the working conditions of the engine electronic control system and other functional modules on the vehicle in real time during the operation of the vehicle. If abnormal working conditions are found, the specific fault will be determined according to a specific algorithm , And stored in the memory in the system in the form of DTC (Diagnostic Trouble Codes). The useful information obtained after the system self-diagnosis can provide help for the repair and maintenance of the vehicle. The maintenance personnel can use the original equipment of the car to read the fault code, so that the fault can be quickly located to facilitate the repair of the vehicle and reduce manual ...

AI Technical Summary

Problems solved by technology

However, the existing vehicle-mounted automatic diagnosis terminal can only roughly judge the GPS direction when the vehicle makes a sharp turn, and there may be misjudgments, resulting in poor user experience

Moreover, when the vehicle is positioned, the initial positioning time is relatively long, resulting in the loss of part of the driving track.

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