| 摘要 |
FIELD: measuring equipment.SUBSTANCE: invention relates to automatic means of periodic monitoring of condition of building or engineering-construction utility structure during its operation. Peculiar feature of proposed system is that it is equipped with reader, and as measuring transducers are used passive transponders on surface acoustic waves, wherein reader has series-connected to output signal pre-processing unit synchroniser, frequency synthesiser, duplexer, input-output of which is connected with transceiving antenna, and n signal processing channels, each of which comprises serially connected to duplexer output bandpass filter, phase doubler, phase halver to first narrow-band filter and phase detector, wherein output of first narrow-band filter is connected in series to multiplier, second input of which is connected to corresponding output frequency synthesiser, second narrow-band filter and frequency deviation meter.EFFECT: high efficiency of measurements and long-term monitoring condition of building or engineering-construction structure.1 cl, 3 dwg |
