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A method and device for measuring the distance of a target object

A technology of target object and distance, applied in the field of communication, can solve the problem of inaccurate distance measurement of the target object, and achieve the effect of accurate method, simple operation and elimination of phase change.

Active Publication Date: 2019-08-20
四川九洲防控科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method and device for measuring the distance of the target object, which is used to solve the technical problem of inaccurate measurement of the distance of the target object in the stepped frequency radar in the prior art

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  • A method and device for measuring the distance of a target object
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  • A method and device for measuring the distance of a target object

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Embodiment 1

[0043] Embodiment 1 of the present invention provides a method for measuring the distance of a target object, which is applied to a step frequency radar system. refer to figure 1 , the stepped frequency radar system at least includes: a Transmitter and Receiver (T / R) component 110 , a signal generating module 120 and a signal computing module 130 . refer to figure 2 , the method for measuring the target object distance specifically includes the following steps:

[0044] Step 210: Generate a fixed frequency signal and a stepped frequency signal.

[0045] Specifically, the signal generating module 120 first generates two sets of chirp signals separated in the time domain, namely: the first chirp signal and the second chirp signal, the timing of the first chirp signal and the timing of the second chirp signal do not overlap; then the generated first chirp signal and the second chirp signal and the first local oscillator signal are up-converted, and the fixed frequency signal ...

Embodiment 2

[0085] Embodiment 2 of the present invention provides a method for measuring the distance of a target object. The method for measuring the distance of a target object in Embodiment 2 belongs to the same inventive concept as the method for measuring the distance of a target object in Embodiment 1 of the present invention. The difference lies in:

[0086] Embodiment 1 is to generate a fixed-frequency signal and a step-frequency signal according to a group of local oscillator signals (ie, the first local oscillator signal) and two sets of chirp signals separated in the time domain (ie, the first chirp signal and the second chirp signal). signal, since the timings of the first chirp signal and the second chirp signal do not coincide, the timings of the generated fixed-frequency signal and step-frequency signal do not coincide, so the radar system in Embodiment 1 only needs to use the same T The / R component and the same signal operation module send, receive and process signals. In...

Embodiment 3

[0106] Embodiment 3 of the present invention provides a device for measuring the distance of a target object, which is used to implement the method for measuring the distance of a target described in Embodiment 1 of the present invention. see figure 1 , the device includes:

[0107] The signal generation module 120 is used to: generate a fixed frequency signal and a step frequency signal;

[0108] The T / R component 110 is configured to: send the fixed frequency signal and the stepped frequency signal, and receive the reflected echo signal of the target object;

[0109] The signal operation module 130 is configured to: determine a parameter characterizing the moving speed of the target object according to the fixed-frequency echo signal; determine the distance of the target object according to the parameter and the step-frequency echo signal .

[0110] In a specific implementation process, the specific implementation manner of the signal generating module 120 may be an integ...

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Abstract

The embodiment of the invention provides a method and device for measuring the distance of a target object, and aims at solving a technical problem that a step-frequency radar is not accurate in measurement of the distance of the target object in the prior art. The method comprises the steps: transmitting a fixed-frequency signal and a step-frequency signal; obtaining a fixed-frequency echo signal and a step-frequency echo signal reflected by the target object; determining a parameter for representing the moving speed of the target object according to the fixed-frequency echo signal; and determining the distance of the target object according to the parameter and the step-frequency echo signal.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for measuring the distance of a target object. Background technique [0002] The stepped frequency radar transmits the stepped frequency signal and performs wideband processing on the echo signal reflected by the target object to achieve high-resolution distance measurement of the target object. Because of its low requirements on the instantaneous bandwidth of the transmitter, receiver and digital signal processing, it can effectively reduce the complexity, technical difficulty and development cost of the radar system, and because it reduces the instantaneous receiving bandwidth of the system, it also improves the The anti-interference ability of the system is widely used. [0003] However, the step frequency signal is Doppler sensitive, that is, when the target object moves radially relative to the radar, due to the influence of the range-Doppler coup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
Inventor 赵怀坤冯江华
Owner 四川九洲防控科技有限责任公司