| 摘要 |
After the launch of a flying station. e.g. a missile, its distance from a base station, e.g. a tank, is continuously detected and compared with a stored distance between the base station and the target; if the two values coincide, the flying station is activated. The invention compensates for the perturbing effect of base station and target movements by determining the velocities of these at the base station and adjusting the frequency the microwave signal which is transmitted to the flying station for generation of a Doppler signal. A subtraction circuit forms the difference between the target velocity and the tank velocity. The product of the frequency of the generator on the launch of the flying station (50) and the output signal of the subtraction circuit is formed by means of a multiplier. From the voltage signal of the multiplier and a voltage signal proportional to the speed of light a divider generates a voltage signal with which the frequency of the generator is controlled. |
