| 摘要 |
<p>A displacement sensor, particularly for monitoring angular displacement over 360°, uses two transducers (1, 2 and 1, 3; 1, 2 and 3, 14, 16; 24-26) whose moving parts (2, 3; 26) are coupled for synchronous displacement over respective paths. Each transducer has a measurable parameter. For the first transducer (1, 2; 24-26), the path has a plurality of equal portions (AB, BA) in each of which the parameter varies uniformly over the same range. For the second transducer, the values or ranges of its parameter are characteristic of the portions. Thus they can provide a logic signal for indicating the path portion so that the parameter value of the first transducer determines the displacement position uniquely. For example, the first transducer may be a rotary potentiometer (1, 2) with 180° taps (A, B). The second transducer (3, 14, 15) may employ two 180° contact plates (14, 15) held at high and low potential (respectively), and a sliding contact (3) rotationally fast with the contact (2) of the potentiometer.</p> |
