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一.问题的提出在对测距时,如果飞机前面出现灰尘、烟、薄云,飞机后面有云层,那么除飞机外,这些无关吕标也要反射激光。如果飞机前面那些无关目标反射的激光也进入接收机,就会使测距得到一个错误的结果。要是接收机只能对飞机前后很窄距离范围(比如前后100米)内的回波发生响应,而对此范围之外的任何目标的回波都不响应,那就可使对测距的干扰大为减少,从而提高了测距的
I. Problems raised In the distance measurement, if there is dust in front of the aircraft, smoke, thin clouds, the clouds behind the plane, then in addition to aircraft, these irrelevant targets also reflect the laser. If the laser reflected by an unrelated target in front of the aircraft also enters the receiver, it will result in a wrong result for the distance measurement. If the receiver can only respond to echoes within a very narrow range of front and rear of the aircraft (eg, 100 meters in the fore and aft) but does not respond to echoes of any target outside of this range, interference to ranging Greatly reduced, thereby improving the rangefinder