| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic acceleration sensor which can be installed near a car engine and to provide an acceleration detecting system using the acceleration sensor. SOLUTION: By adjusting the gain of differential amplification means 4, 5, and 6 which differentially amplify the voltage output of a piezoelectric element 3 using a temperature compensation means 9, the output temperature characteristics of the piezoelectric element 3 is compensated while a capacitor 8 is inserted in parallel with the piezoelectric element 3 to increase the resultant capacitance of the piezoelectric element 3, so that the cut-off frequency in the low area is set lower without increasing the resistance of a bias resistor circuit 7, to constitute an acceleration sensor 1. With the acceleration sensor 1 set at the front of a car, its sensor output is received with a receiving means 2 installed in a car room. |
