SU1406716A1 - Follow-up converter for measuring signal frequency of doppler meters of vehicle speed - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to improve the accuracy of measuring the Doppler frequency shift of a signal with an asymmetrical spectrum and to extend the functionality by obtaining information about the angle of the probe radiation. The device contains synchronous detectors 1 and 2, a tracking error generator 3, a phase splitter 4, controlled by r-5, a multiplier 6, an integrating amplifier 7, a voltage divider 8, and a functional transmitter 9 of the angle of the probing radiation. When the Doppler signal arrives at detectors 1 and 2, they form two orthogonal signals from which the tracking error voltage is formed. This voltage, passed multiplier 6 and amplifier 7, carries out the restructuring of grs 5, which leads to a reduction in tracking error. In order to increase the measurement accuracy at angular oscillations of the probe radiation at the output of the converter 9, by means of the divider 8, a correction voltage is applied to the other input of the multiplier 6. At the output of the divider 8, a voltage is formed proportional to the angular oscillations of the vehicle, which provides wider functional device capabilities I il. i (L

Description

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The invention relates to a measurement technique and is intended for use in signal processing systems of a Doppler vehicle velocity meter.

The purpose of the invention is to improve the accuracy of measuring the Donler frequency shift of a signal with an asymmetric spectrum and to expand the functionality by obtaining information about the angle of the probe, its radiation.

The drawing shows a structural electrical circuit of the next transducer for measuring the frequency of the signals of the Doppler vehicle velocity meters.

The next converter for measuring the frequency of the signals of vehicle Doppler velocity meters contains the first and second synchronous detectors 1 and 2, respectively, the tracking generator 3, the phase cutter 4, the controlled oscillator 5, the transceiver 6, the integrated amplifier 7, the divider 8 eg. functional converter 9 of the angle of the probing radiation.

A subsequent transducer for measuring the frequency of the signals of the Doppler vehicle speed meters works as follows.

The Doppler signal with the frequency Ki arrives at the first inputs of synchronous detectors 1 and 2. The second inputs of the synchronous detectors from the outputs of the phase propagator 4 receive two quadrature signals with a frequency of the controlled oscillator p5. From the outputs of synchronous detectors, two orthogonal signals with a frequency (RL-FS) arrive at the inputs of the imaging unit 3 tracking errors. The signal at the output of the tracking error generator 3 is a voltage whose amplitude is proportional to the frequency of the input si | The polarizer is determined by the phase shift of the driver's input signals (the sign of the frequency difference RD-XR), i.e. represents the tracking trace tracking pulse; its converter for measuring the frequency of signals from Doppler vehicle speed meters.

The voltage of the tracking error through the multiplier 6 is fed to the input of the integrating amplifier 7, causing a change in its output voltage and, accordingly, restructuring of the controlled oscillator 5. Pe1406716

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Restoring a (changing the frequency of the output signal) of a controlled oscillator 5 leads to a decrease in tracking. If the relay angle of the probed radiation of the Doppler velocity meter does not change, this restructuring leads to a decrease in the tracking number to zero.

In the measurement accuracy, at angular oscillations of the probing radiation, a correction voltage is generated at the output of the functional converter 9 with the help of the divider 8, which is fed to another input of the transducer. 1H 6. At the output of the divider 8, a voltage is formed that is proportional to the vehicle's angle xlebi, which regulates the functionality of the device.

Formula u: ior fiereHu.4

(. e.:. IQ conversion for measuring the frequency of the signal; 1 Doppler measurements; 1C (1 speed, m) of aport equipment containing the first and second synchronous detectors, the first inputs of which are combined and are the input of the transducer) , the outputs of synchronous detectors are connected to the inputs of the shunting error generator, the second NX synchronous detectors are connected to the outputs of phase splitting, the input of which is connected to the output yn) of the generator 1, differing in that increase the accuracy of measurement of the Doppler shift signal cells with a non-symmetric spectrum and extensions of the function of:) ample opportunities by obtaining information about the angle of radiation, a non-multiplier, integrating amplifier, divider} 1iry, and a functional angle transducer of the transmitter, moreover, the tracking driver is triggered through a serially connected multiplier and an integrated amplifier connected to an RH generator and the first input of the de-amplifier 1p)), and the output of the integrating amplifier is the first output | 1 is connected to the second input of the divider, the output of which through the functional angle transmitter of the probing radiation is connected to another input of the resident, whereby the output of the voltage divider is the second output of the device converter.

Claims (1)

Claim 20 Tracking transducer for measuring the frequency of signals of Doppler speed meters of vehicles, containing the first and second synchronous detectors, the first inputs of which are combined and are the input of the converter, the outputs of synchronous detectors are connected to the inputs of the tracking error generator, the second inputs of synchronous detectors are connected to the outputs of phase thawing whose input is connected to the control output 30 generator, characterized in that, in order to improve the accuracy of measuring the Doppler frequency shift of a signal with an asymmetric spectrum and expand the functionality by obtaining information about the probe angle 35 of radiation, a multiplier is introduced into it, an integrating amplifier, a voltage divider and a functional transducer angle of the probe radiation, the output of the tracking error generator through series-connected multiplier and 40, the integrating amplifier is connected to the controlled generator and the first input of the voltage divider, and the output of the integrating amplifier is the first output of the converter, while the output of the lighter 45 resident is connected to the second input of the voltage divider, the output of which is connected to the other input of the multiplier through a functional transducer of the angle of the probe radiation, The output of the voltage divider is the second output of the device converter. Compose. '!!, A. Kolosov