| 摘要 |
<p>Object detector for detecting studs within walls having an oscillator (G1, R1, R2, D1, C1) with a capacitance (C1) which is cyclically charged and discharged. An electrode (14) is coupled to the oscillator and arranged to produce an electric field therearound. This field is partially discharged when an object is brought near the electrode to vary the output of the oscillator to permit detection of the object. In one specific form there are two oscillators, the outputs of these being variably influenced by introduction of the object near the electrode.</p> |
