Patent ID: 11913925
Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A calibration method for a sensing device, the sensing device comprising a multi-sensor integrated single chip and a processing circuit, the multi-sensor integrated single chip comprising a temperature sensor, a pressure sensor, and a first environmental sensor, and the calibration method comprising:
by the processing circuit, establishing a look-up table which comprises a relationship between temperature to an output offset calibration parameter and an output gain calibration parameter of the pressure sensor;
by the processing circuit, storing the look-up table in a memory;
by the processing circuit, driving the temperature sensor to sense temperature and generating a first sensed temperature value;
by the processing circuit, driving the first environmental sensor to operate, and driving the temperature sensor to sense temperature, and generating a second sensed temperature value;
by the processing circuit, driving the pressure sensor to sense pressure and generating a sensed pressure value; and
by the processing circuit, accessing the memory to obtain the output offset calibration parameter and the output gain calibration parameter of the pressure sensor from the look-up table according to the first sensed temperature value and the second sensed temperature value and calibrating the sensed pressure value according to the output offset calibration parameter and the output gain calibration parameter to generate a calibrated pressure value.