KR970048605A - Radio frequency distance measuring device and method - Google Patents

Abstract

The present invention relates to an apparatus and method for radio frequency distance measurement. In general, a radio frequency signal has a fixed distance measurement resolution and a relative speed resolution according to a frequency and period for frequency modulation, and a speed of the device. In this regard, the present invention has a problem that the utility is also halved, and the present invention has been made in consideration of such problem checking to make a high-efficiency device with a minimum reduction in radio frequency transmission power, and by synchronizing the frequency modulation period with the period of the trigger signal, the distance and relative The speed resolution can be varied depending on the situation to improve the accuracy of the relative speed.

Description

Radio frequency distance measuring device and method

As this is a public information case, the full text was not included.

1 is a block diagram of a distance measuring device of the present invention.

2 is a flowchart showing a digital signal processing operation of the present invention.

Claims (2)

An apparatus for measuring a radio frequency distance, comprising: a triangle wave generator (10) for generating triangle waves at the same period as a period of a trigger signal; A voltage controlled oscillator 20 for modulating the triangular wave oscillation frequency sphere of the triangle wave generator 10; A local oscillator 30 generating a carrier frequency; A synthesizer 1 (40) for synthesizing the signals of the voltage controlled oscillator (20) and the local oscillator (30); A transmit antenna (50) for emitting a synthesized signal of the synthesizer 1 (40); A transmission lens 60 reflecting a predetermined amount of the emission signal of the transmission antenna 50; Receiving antenna 2 (70) for receiving the reflected signal of the transmitting lens (60); A reception lens 80 reflecting the reflected wave by the object; A receiving antenna 1 (90) for receiving the reflected wave of the receiving lens (80); A synthesizer 2 (100) for combining the signals of the receive antenna 2 (70) and receive antenna 1 (90) to remove the carrier frequency; An amplifier (110) for amplifying the intermediate frequency signal of the synthesizer (2); A low pass filter 120 for removing the amplified signal noise of the amplifier 11; An automatic gain adjuster (130) for adjusting a gain of the low pass filter (120) signal; An analog / digital converter (140) for converting the automatic gain adjuster (130) signal into a digital value; A buffer 150 for storing the digital value of the analog / digital converter 140 at a designated address; A digital signal processor (160) for calculating distances and relative speeds of the output values of the buffers (150); An information indicator (170) displaying the calculated value of the digital signal processor (160); Radio frequency distance measuring apparatus comprising a ROM (180) for storing the data of the information indicator (170). A method of operating a digital signal processor in a radio frequency distance measuring apparatus, the method comprising: initializing a first step (S1); A second step S2 of determining whether an object is detected after the first step S1; A third step (S3) of constantly outputting a trigger signal period since there is no object detected after the determination of the second step (S2); A fourth step (S4) of varying and outputting a trigger signal period when an object is detected after the determination of the second step (S2); A fifth step (S5) of loading analog / digital conversion data into the third period (S3) and the fourth step (S4) output signal in a previous period; A sixth step (S6) of storing the current analog / digital conversion data after the fifth step (S5) until the number of conversion sizes is stored; A seventh step S7 of increasing the resolution of the data loaded in the fifth step S5; An eighth step S8 of changing a fast Fourier after the seventh step S7; A ninth step S9 of obtaining a magnitude of each frequency component after the eighth step S8; The ninth step (S9); A tenth step (S10) of distinguishing an object based on a distance and a relative speed after the ninth step (S9); The eleventh step S11 of selecting and tracking an object after the tenth step S10 and the twelfth step of displaying information of the object after the eleventh step S11 and repeating the second step S2 ( S12) sequentially operating radio frequency distance measuring apparatus. ※ Note: The disclosure is based on the initial application.