| 摘要 |
<p>PURPOSE: To match a sensor system, which is controlled by a sensor, with a subjective feeling by improving the response sensitivity of the system on the basis of an electric control signal to be generated in the case of surrounding luminosity lower than daytime beams. CONSTITUTION: A precipitation sensor 1 is connected through a transmission part 2 to an input terminal E1 of an amplifier 3 and an output terminal A is connected through a threshold switch 4 to a manual control switch STS of a controller SG of an automobile window glass washing device SW. On the other hand, a luminosity sensor 9 is connected with self-attenuators 10-12 by an input terminal E2. Thus, when the output of the luminosity sensor 9 is the prescribed switching threshold value of an input signal smaller than the daytime light value of a threshold value switching element 10, the positive control signal is sent to a confluence 6. Thus, the control signal is added to the signal voltage of the precipitation sensor 1. Therefore, when it is dark around, the system responds to the detected precipitation from the precipitation sensor 1 quicker than the case of daytime light.</p> |
