| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a radar equipment which dispenses with signal processing and computation at high speed, is simple in the circuit constitution, and restrains power consumption. SOLUTION: A pulse signal output part 11 radiates fixed output pulse into a space at intervals of 4μsec. A reflected light by a target is detected by a reflected pulse signal receiving part 12, and a received signal containing noise component is formed. An integration circuit 14 integrates the received signals formed by the reflected pulse signal receiving part 12 in a long phase sectionΔt corresponding to the detected range of distance of 50m at every output pulse, so as to average noise components, and terminal voltage corresponding to the distance to the target is generated in a capacitor C1. A comparator 15 compares this terminal voltage with a fixed threshold value VR, and when it exceeds the threshold value, an alarm part 17 is started so as to generate a buzzer sound. A driver can immediately judge abnormal approach of the target through the buzzer sound.</p> |
