Experimental Study Of Temperature Effects Of Artillery Pumping Device Stress Testing

Usually, the output of pressure sensor not only depends on target parameter (pressure), but also is affected by non-target objection parameter. For example, the pressure sensor is affected temperature of powder gas in pressure measurement of gun bore evacuator. First of all, the paper describes theory and method of temprature error compensation of piezoresistive sensor theory, then, the paper gives the theory, concept and character of piezoresistive pressure sensor concept and character of piezoresistive pressure sensor. Because piezoresistive pressure sensor's sensitivity and measurement precision is influenced by temperature. To take piezoresistive pressure sensor for example, the paper constructs experiment system based on PXI bus instruments, to acquire experiment data for compensating software to compensatate the temperature error of piezoresistive sensor. Then, temperature error and sensitivity parameter of temperature were analyzed, and a method for compensating temprature error and non-linearity of piezoresistive pressure sensor is designed using 2-dimensional interpolation of bilinear, bicubic and bicubic spline function. The application programs of data acquisition, error analysis, and temprature error compensation of piezoresistive sensor have been completed on development environment of Labview. Finally, the paper presents the realization of pressure sensor temperture error compensation system in Labview and the application of the BP neural network trained by experimental samples in Matlab neural network toolbox as the model for Labview Matlab script node call. The paper compare 2-dimensional interpolation functions, all of experimental results show that the effect of temperture error compensation of 2-dimensional interpolation and BP neural network is excellent.