| 摘要 |
<p>Signal generator circuits are connected to a reed switch under test to apply a linearly changing current superimposed on a bias current level simultaneously to an operating coil and to its reed blades. Voltage developed across the contacts is amplified and differentiated while the changing current twists the blades as a result of magnetostriction. When the contacts are made through rough or contaminated areas as they are being moved by the twisting of the blades, the differentiated voltage exceeds a reference voltage and causes an indication of rejection.</p> |
