| Title |
A Study on the Pressure Sensor for the Direct Detection of the Approach to the Dangerous Power Facilities Using Pb-free BNKT Ceramics |
| Authors |
홍재일(Hong, Jae-Il) ; 류주현(Yoo, Ju-Hyun) |
| Keywords |
BNKT Ceramics ; Dangerous Power Facilities ; Pb-free ; Pressure Sensor |
| Abstract |
A infrared rays sensor or ultrasonic sensor can detect the object at the narrow area, however a pressure sensor can detect man and animal at the wide area. It is necessary to manufacture the sensor by using Pb-free ceramics in the respect of environmental protection. Piezoelectric properties of ceramics added 0.2wt% La_2O_3;into;0.96Bi_{0.5}(Na_{0.84}K_{0.16})_{0.5}+0.04SrTiO_3 were 0.4 of kp, 31×$10^{-3}Vm/N;of;g_{33}. The output voltage of the pressure sensor is 0.48 V at 20 inH_2O. The output voltage of the pressure sensor with driving circuit is 9.8 V, 37 ms width. |