Soil Pressure Mini-sensor Made of Monocrystalline Silicon and the Measurement of Its Sensitivity Coe

A calibration test was done in order to measure its sensitivity coefficient by an improved soil test device. The experimental result shows that the soil pressure min- sensor made of the monocrystalline silicon ( SPMMS ) is proved to be good linear, high precision and less discrete that can fetch precise data in low pressure range even near by 0 point, which guarantees the reliability of the soil pressure test in geotechnical engineering.