| 摘要 |
<p>PROBLEM TO BE SOLVED: To carry out child locking operation by using a human-body sensor judging whether the human body is present and whether the human body is an adult or a child from a detecting signal and the oscillation frequency of a high-frequency signal and automatically locking a door. SOLUTION: This door automatic lock device is composed of a human-body sensor 8 and a child locking electromagnetic lock section 5 locking a door for an automobile. A high-frequency signal is transmitted to a sensor section 1 through a transmission line 4 in a transmitting section 2 for the human-body sensor 8, and the reflecting signal of the high-frequency signal reflected by the sensor section 1 and returned to the oscillation section 2 side is detected in a reflecting-wave sensor section 3. A control section 7 controls the oscillation section 2 with receiving an output from the reflection-wave sensor section 3, discriminates freight, an adult and a child, and outputs a signal displaying the child to the child locking electromagnetic lock section 5 at the time of the child. When the child locking electromagnetic lock section 5 receives the lock signal, a current flows through a magnetic coil, and the door for the automobile is locked automatically.</p> |
