| 摘要 |
A method for coding remotely detectable gauges (10), whereby at least two elements (18, 19), the characteristics of which being changed by an external magnetic field, are arranged to form a gauge (10). The gauge (10) is exposed to a biasing magnetic field covering an interrogation volume (11), that is larger than the gauge, and the resonance frequency of the elements (18, 19), which is changed by the magnetizing field strength (H) of the magnetic field, is detected. The elements on each gauge (10) are oriented in predetermined angular relations with respect to each other so as to provide an identity for the gauge (10) determined by the angular relations, and the elements are exposed to a sequence of different field conditions. All possible combinations of as many magnetic field components as there are elements are compiled, and the magnetic field components are arranged in possible angular relations in the gauge (10). All angular relations or codes, which may be correct for different element combinations, are determined, and the determination is repeated until only one code for each unique element combination remains.
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