| 摘要 |
<p>The computer determines the altitude of an aircraft. A pressure transducer senses the atmospheric pressure at which the aircraft is located, and forms an output signal indicative of such pressure. A computing circuit computes the altitude, forming digital altitude signals from the output signal from the pressure transducer. The digital altitude signals from the computing circuit also define and correspond with address locations in a memory storage. The address locations in the memory storage contain code signals representing the altitude of the aircraft according to a pressure-altitude relationship. The code signals stored in the memory storage represent the gray code, which are pref. furnished to a transponder for transmission to others for air traffic control and other purposes. Vertical rate of the aircraft is also determined in the computing circuit and both the altitude and the vertical rate of the aircraft computed in the computing circuit are displayed.</p> |
