The invention provides an error compensation model and an
algorithm of a high precision pressure
transducer. The invention uses an oven and a standard pressure source to collect the output data of the
transducer under N temperature spots and M pressure spots to constitute an N*M matrix; a sensor output
mathematical model is established, and the thermal compensation coefficients a(T), b(T), c(T) of the sensor output function, and the electrical null of the sensor under different temperatures are fit according to the collected data: U0(T)=f(T), and the parameters are written into a
microprocessor; when the invention is used, the electrical null U0 of the restoration
record transducer is clicked at the time point of zero pressure, and U0(T) is calculated through the information of the collected temperatures (T), and the time shift of the sensor within the use and compensation intervals is calculated out:
delta=U0-U0(T); the
microprocessor calculates the conditioner
microprocessor output by collecting the information of the output
signal (U) of the temperature transducer (T) and the pressure transducer according to the compensation formula: P=a(T)(U-
delta)<2>+b(T)(U-
delta)+c(T). The invention combines the design and production technologies of pressure sensors, the
signal conditioning technology and the
computer technology to achieve rectification of the pressure transducer in the wide temperature range. The pressure
signal characteristic and effect is excellent.