Border Sensing Effect And Its Application In Dynamic Digital Measurement

With the rapid development of science and technology requirements for measurement precision in a variety of fields are higher and higher. There exist problems of measurement resolution and error in all measurement. The measurement resolution(namely sensitivity) and stability of a sensor are contradictory. A sensor with low resolution has better stability, while one with high resolution has poor stability. The resolution of a sensor is always limited and cannot be improved all the time because of the restrictions of manufacturing techniques.There are fuzzy areas with stability in digital measurement. The process of converting analog signals into digital ones exists in all sensor measurement systems. The digital output actually is a number of dynamic fuzzy areas. Border sensing effect utilizes the border stability of the fuzzy area to obtain higher measurement precision on the basis of the original resolution of the system---i.e. resolution of the A/D converter, thus satisfying the measurement requirements in the field of contemporary scientific measurement and control.The paper discusses the theory of border sensing effect and ways of realization---i.e. dynamic border sensing technology in detail. The border of a dynamic fuzzy area can sensitively detect the states inside and outside the fuzzy area with its higher stability. In this way, points at the border have much higher precision. Having captured these feature points, we can recover the original analog electrical signal with higher precision through curve-fitting, thus implementing high precision measurement. At the same time, the paper deals with the application of border sensing effect in dynamic digital measurement and realizes optimization of quantization error in digital measurement, which leads to the improvement of ultimate measurement precision. Two groups of experiments are described in the paper. Advantages of the border sensing effect-based method of 8-bit A/D digital measurement over the traditional 8-bit A/D digital measurement method are verified. The measurements demonstrate that border sensing effect, in a sense, effectively improves the ultimate measurement precision.The problem of synchronization between the sampling clock and the jumping border exists when dynamic sensing technology is employed to precisely capture the exact border-points and fully eliminate quantization error. Three exploratory approaches have been proposed in the paper, providing new ideas for realization of ultrahigh precision measurement.