| 摘要 |
An ultrasonic device of a protective signaling system relates to alarm systems. The device comprises in series connected a receiver of probing reflected ultrasonic signal, an input signal rectifier, an analog converter, a phase detector, an analog-to-digit converter, a discrete wavelet converter, a threshold device, a circuit changer, an a device of difference estimation and generation of a difference informational signal and an indicator. Output of a reference generator is connected to the phase detector, second output of which is connected to input of an ultrasonic radiator. Second input of the device of difference estimation and generation of a difference informational signal is connected to output of a memory device, input of which is connected to circuit changer output. The device provides stabilization to malfunctions and threshold extension of minimal rate for moving objects in the building. |
