Integrated positioning function of tachograph module

The recorder shall have the function of satellite positioning. The positioning communication mode shall give priority to Beidou satellite positioning system. The output format of positioning data shall comply with the provisions of table a.20 in Appendix A.

The positioning function of recorder used for commercial road transport vehicles shall meet the requirements of 5.2.1 in JT / T 794-2011.

4.5 performance requirements

4.5.1 driving record performance

4.5.1.1 time recording error

The recorder continuously records 24h data, and the allowable error of recording time should be within ± 5S.

4.5.1.2 speed recording error

4.5.1.2.1 analog speed recording error

The analog speed signals equivalent to 20km / h, 65km / h, 100km / h and 145km / h are output respectively. When the recorder is tested, the allowable speed recording error is ± 1km / h.

4.5.1.2.2 real vehicle speed recording error

The recorder is installed on the test vehicle for real vehicle road test. When the driving speed is constant at 40km / h ± 1km / h and the driving speed is 40km / h ～

Under the condition of 60km / h variation, the allowable error of speed recording is ± 2km / h.

4.5.1.3 mileage recording error

During type inspection, the recorder is installed on the test vehicle to test the real vehicle mileage error. When the test distance is 5km, the allowable error of driving mileage is within ± 0.1km.

4.5.2 positioning performance

The deviation between the position determined by the recorder positioning module and the actual position is not more than 15m.

The positioning performance of the recorder used for commercial road transport vehicles shall meet the requirements of 5.2.2 in JT / T 794-2011.

4.6 data analysis software

The data analysis software of the recorder shall be compatible with the data communication protocol specified in this standard. It shall use Chinese interface and be able to operate in general Chinese

Installed in the system. The data analysis software should be able to connect with the recorder data management platform and transmit the specified data records to the external.

The data analysis software should have the functions of original data reading, query, statistics, chart generation, parameter setting, operation authority management, etc.

After collecting the original data, the data analysis software should be able to generate at least the following charts:

a) Record the driving speed curve. The content and record format shall meet the requirements of 4.4.1.2.1. Its abscissa is the real-time time, and the ordinate is the vehicle speed value corresponding to the real-time time time, status signal and other signals required by customers. The curve chart shall also include the number of motor vehicle license plate, the classification of motor vehicle number plate, the number of motor vehicle driver's license, etc. Among them, the driver's license number information can be changed with the login time of different drivers;

b) Data curve of suspected accident points. The content and record format shall meet the requirements of 4.4.1.2.2. See Appendix D for curve legend. Its abscissa is real-time time, and its ordinate is vehicle speed value and braking status signal corresponding to real-time time time. At the same time, the curve chart shall also include the number of motor vehicle license plate, classification of motor vehicle license plate, number of motor vehicle driver's license, etc;

c) Data list. According to the contents of data records specified in article 4.4.1.2, the designated data records within the specified time range shall be listed.