| 摘要 |
PURPOSE:To eliminate abnormal values from operation results by providing both an input circuit which the acceleration sensor signal is entered and a circuit, which keeps the value immediately before the variation in output value and outputs it when the variation exceeds the specified value, and by outputting the said immediately-before-value when the sensor signal is suspended for a moment. CONSTITUTION:A signal S1 from a potentiometer 2 is given to an operational amplifier 15 via a low-pass filter 14, the low-pass filter 14 for a voltage buffer circuit having high input impedance prevents external noise. Next, the output from the operational amplifier 15 is given either to A-side of a switching circuit 17 or to B-side of the circuit 17 through an integrating circuit 26. The integrating circuit 26 keeps the output from the operational amplifier 15 to outputs it. An abnormality detecting circuit 18 outputs a switching signal S12 at the time of abnormality or sharp variation. Next, the switching circuit 17 is switched to A-side when the signal S12 is in a low level while to B-side when a high level. In a normal state, the acceleration signal reads S3. When the potentiometer 2 is suspended for a moment, this signal S3 is output as a tentative accleration signal because the output from the circuit 26 immediately after the suspension is nearly equal to that before it undergoes sharp variation. With this contrivance, the possibility of indicating abnormal values can be eliminated. |
