JIANG Dong, SHAN Yi, LIU Xu-kun, et al. Function fitting method for non-linear and temperature compensation of force digital sensor[J]. 2016, 35(2): 16-18+22.
JIANG Dong, SHAN Yi, LIU Xu-kun, et al. Function fitting method for non-linear and temperature compensation of force digital sensor[J]. 2016, 35(2): 16-18+22. DOI: 10.13873/J.1000-9787(2016)02-0016-03.
nonlinear and temperature characteristics of force digital sensor
software is used to compensate. The nonlinear characteristics of force digital sensor are analyzed. Function relationship between gravity and output frequency is obtained by cubic spline interpolation
the measured output frequency is used to calculate the measured gravity. Temperature characteristics of force digital sensor piecewise cubic interpolation function is established
and function relationship between output frequency and measured gravity at different temperatures is obtained by inverse function. The temperature and frequency is used as independent variable
measured gravities is obtained by calculating piecewise cubic interpolation function. This method greatly reduces amount of data needed. Experimental results show that the measurement precision of this method is higher
the maximum reference error is 5 ‰ after non-linear and temperature compensation