Digital tracking filter-processor for signal processing Doppler velocimeter

摘要

The digital tracking filter processor for Doppler velocimeter signal processing for use in devices for contactless remote measurement of liquid flow rates and gas, as well as the diffusely reflecting solid objects. Filter processor comprises two quadrature channels for processing input signals consisting of a series-connected mixer and a low pass filter and. sampling and storing a signal device. Control inputs of each of the devices quadrature channels are connected together. The structure of a tracking filter also includes analog-to-digital converter connected with its input to the output of the switch, the quadrature generator tunable frequency, a microprocessor and an interface unit connected via a common bus to a microprocessor, wherein the first inputs of the mixers are devices inputs, and second inputs connected respectively to the first and second outputs of the quadrature oscillator frequency. Each of the quadrature channels includes only one device at sample and hold signal, the switch configured dual.; The formula contains 1 independent claim 1, fig.