2008 Volume 64 Issue 3 Pages 696-711
One problem has usually arisen that earth-pressure sensor causes stress concentration in the earth. A new type of earth-pressure sensor with low-rigidity is invented, which is based on the idea to devise effective means of making the apparent-rigidity of sensor the same low as earth. Furthermore, a triaxial variable air-pressure calibration system is newly developed. The test results show that comparing with the diaphragm-type sensor, the measurements gained using the developed sensor are nearer to the real ones. The properties of output error and hysteresis of the sensor that are not given by the error theory about traditional types of sensor are obtained, which benefit the development of optimum earth-pressure sensor.
