| 摘要 |
The information extraction device has a device for reception of a reflected signal with a first carrier signal frequency and a reflected signal with a second carrier signal frequency, upon application of 2 different carrier signal frequencies to the surface acoustic wave sensor, with determination of the phase variations for both carrier signal frequencies, for calculation of distance information from the corresponding signal propagation time. Also included are Independent claims for the following: (a) a device for matching an evaluation circuit to a surface acoustic wave sensor; (b) a device for determining the non-ideality of a modulation device coupled to a surface acoustic wave sensor; (c) a device for calibration of a modulation device coupled to a surface acoustic wave sensor; (d) a method for extraction of distance information from a surface acoustic wave sensor; (e) a method for matching an evaluation circuit to a surface acoustic wave sensor; (f) a method for determining the non-ideality of a modulation device coupled to a surface acoustic wave sensor; (g) a method for calibration of a modulation device coupled to a surface acoustic wave sensor; (h) a computer program with computer codes for extracting distance information from a surface acoustic wave sensor, for matching an evaluation circuit to a surface acoustic wave sensor, for determining the non-ideality of a modulation device coupled to a surface acoustic wave sensor and/or for calibration of a modulation device coupled to a surface acoustic wave sensor
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