| 摘要 |
The invention relates to electronics. It relates in particular to a device for control by proximity, characterised in that it comprises a stationary circuit I with an alternating-current generator 1, a primary winding 3, to which the A.C. signal is applied, and a detection circuit 4 detecting the impedance variations in the winding 3, and supplying a control signal for a working circuit, the device furthermore comprises a moving circuit II with a secondary winding 5 intended to be located in close proximity to the winding 3, and whose terminals are connected through a converter circuit 7, supplying a direct current powering a generator 8, which produces a coded A.C. signal producing an impedance variation in the winding 5, which is transmitted to the winding 3 and detected by the said detector circuit. The invention applies in particular to the control of electrical locks. <IMAGE>
|
