Method for determining the spacing and relative velocity of distant objects
A technology of relative speed and object, applied in the direction of using re-radiation, radio wave reflection/re-radiation, measuring devices, etc., can solve the problems of significant, costly, analysis and processing costs, etc.
Active Publication Date: 2018-04-24
S M S SMART MICROWAVE SENSORS
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Therefore, analysis processing costs are significant and require not only efficient algorithms but also fast computational performance
Furthermore, for the evaluation of more complex cases, considerable effort is required in the transmitter components of the device for carrying out the method
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[0026] figure 1 A first signal A and a second signal B transmitted alternately are shown. The first signal A consists of a plurality of signal segments which are transmitted over a time period T. The duration T corresponds to about T=1 / f Step frequency f Step . Intervals of equal length are provided between the signal segments of signal A, during which intervals the signal segments of signal B can be transmitted. In the illustrated embodiment, the second signal B is delayed by a time dT(=d / f Step ), where d=3 here, so that no signal segment of the second signal is transmitted between the first two bursts of the first signal A. For interleaving without transmission pauses, d is an odd number and can therefore also be =5, for example.
[0027] exist figure 1 In the preferred embodiment shown in , the frequency steps between the signal segments of the first signal A and the signal segments of the second signal B are respectively constant f Incr , so that signals A and B a...
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A method for determining the distance (R) and relative velocity (v) of at least one object away from an observation point, said method comprising the following method steps: - continuously transmitting signals of each signal period (TChirp) from said observation point At least one first and second electromagnetic signal; - said signal is made up of signal segments (bursts) with a constant frequency and predetermined same duration, wherein the signal segments of the signal are swept through a predetermined frequency step Given a modulation range; - transmitting said signals interleaved with one another in such a way that signal sections of different signals are connected to each other in time, wherein there is a frequency jump between the connected signal sections of different signals; - Receives the signal reflected by the object as an echo signal and performs a frequency mixing operation with the transmitted signal for converting the received signal into the baseband in the same analog channel; - Performs analog-to-digital conversion and samples the received echo signal and extracting at least one sample value for each signal segment; separately analyzing the sample values of the different echo signals of the transmitted different signals by means of a Fourier transform stage and determining the peak corresponding to the signal segment and determining the phase difference between the echo signals of the transmitted signals, characterized in that said second signal (B) is transmitted at the same frequency as the frequency of the corresponding signal segment of said first signal (A) ) signal segment.
Description
technical field [0001] The invention relates to a method for determining the distance and the relative speed of at least one object remote from an observation point, said method comprising the following method steps: [0002] - continuous transmission of one signal period each from the observation point (T Chirp ) at least one first and second electromagnetic signal; [0003] - the signal consists of signal segments (bursts) with a constant frequency and a predefined same duration, wherein the signal segments of the signal are swept through a predefined modulation range by means of frequency steps; [0004] - sending said signals interleaved with each other by temporally connecting signal sections of different signals to each other, wherein there is a frequency jump between the mutually connected signal sections of different signals; [0005] - receiving the signal reflected by the object as an echo signal and performing a frequency mixing operation with the transmitted sign...
Claims
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IPC IPC(8): G01S13/58G01S13/34
CPCG01S13/343G01S13/347G01S13/584G01S7/356
Inventor R·蒙德F·基里施
Owner S M S SMART MICROWAVE SENSORS