| 摘要 |
<p>PURPOSE:To get a relative distance against a target, control an exciting signal delay time in response to an approaching speed between the relative distance and the target given from another device and enable the most suitable exciting signal to be outputted by a method wherein each of the relative relations of received signals is set in response to an output from a code generator and an output of a distance sensing code generator, an amplitude ratio of two signals and a phase of each of the signals are detected. CONSTITUTION:In a distance sensor 18, a result of output from a phase detector 17 divided by an output of a detector 10 becomes a ratio between a relative cooperative function of a code outputted from a code generator 2 and another code outputted from a distance sensing code generator 13 and a self cooperative function of a code outputted from a code generator 2 and it shows an output characteristic. If it is assumed that a reference distance of the output characteristic is RO (m),RO is reduced in a reverse proportion to a frequency for generating a code of the code generator 2. If this frequency is defined as (f)(Hz) and a light speed is defined as C (m/s), they are calculated by the following equation. RO=C/2 X f(m).</p> |
