| 摘要 |
<p>Safety device for locks (electronic lock) with an emitter (2) having the function of a key and a sensor (1) having the function of a lock part, wherein the emitter has soft iron pins providing for the predetermined surface distribution and forming a code of a magnetically permeable but preferably inactive material in the form of excitation elements (9). In the same spatial extent as a superficial matrix, the sensor is provided with sensor elements (6) to detect the emitter code and which may be changed by a modification of the field line distribution by varying the ohmic resistance thereof; said elements are magneto-resistance resistors which are magnetically controlled and preferably designed as an integrated unit. Said magneto-resistance resistors are connected after comparators which are conveniently connected for an unerasable storage of the code word and which have, when the emitter code corresponds, an output potential controlling a triggering mounting arranged downstream to release a locking device. </p> |
