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Patent Searching and Data

Document Type and Number:
Japanese Patent JPH06227363
Kind Code:

PURPOSE: To make it collatable even if the resonance frequency of a resonance circuit is more or less shifted by installing a key coil to be magnetically connected to a rotor coil in time of being rolled on a shaftlike core and key- inserted, and an information generating means responding to a signal induced in the key coil and generating a signal inclusive of specific information from the key coil, respectively.

CONSTITUTION: When such a frequency spectrum as shown in a wave line B in relation of, for example, accuracy, temperature or the like in parts of a resonance circuit can be obtained by a frequency spectral analytic circuit 53, it is fed to a microcomputer 51. In this case, a correlation is sought between a frequency spectrum stored in a fundamental wave memory circuit 52 and, for example, such frequency one as shown in a full line. As the value is more than the specified value (but a resonance point is the same), the microcomputer 51 is so judged that the inserted key is regarded as a normal one, therefore an engine driving command signal is composed, outputting this signal to an engine driving system.

Application Number:
Publication Date:
August 16, 1994
Filing Date:
February 05, 1993
Export Citation:
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International Classes:
B60R25/04; B60R25/24; E05B45/06; (IPC1-7): B60R25/04; E05B45/06
Attorney, Agent or Firm:
Hiroaki Tazawa (2 outside)