Microwave distance measuring device based on relative sampling

A technology of microwave ranging and output terminal, which is applied in the field of microwave ranging devices based on correlation sampling, can solve the problems of high cost and difficulty in implementation, and achieves the effects of fast ranging speed, simple circuit implementation and high ranging accuracy.

Inactive Publication Date: 2011-08-10
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this way, the switching speed needs to be at the ps level to realize the sampling of the pulse to the transmitted wave and the echo, which is difficult to implement and the cost is high.

Method used

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  • Microwave distance measuring device based on relative sampling
  • Microwave distance measuring device based on relative sampling
  • Microwave distance measuring device based on relative sampling

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Embodiment Construction

[0021] see figure 1 , the embodiment of the present invention is provided with a frequency control module A, a receiving module B and a signal processing module C. The frequency control module A is provided with a master clock generator 1 , a master pulse forming circuit 2 , a sampling clock generator 3 and a sampling pulse forming circuit 4 . The input terminal of the master pulse forming circuit 2 is connected to the output terminal of the master clock generator 1 , and the input terminal of the sampling pulse forming circuit 4 is connected to the output terminal of the sampling clock generator 3 . The signal generator is used to control the period of the pulse signal, and the pulse width of the pulse signal is determined by the pulse forming circuit. The frequency control module A generates two channels of pulse waves with a small period difference, the main channel pulse is used as the modulation signal of the transmitted wave, and the sampling pulse is used as the modula...

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Abstract

The invention discloses a microwave distance measuring device based on relative sampling, and relates to a microwave distance measuring device. The invention provides a microwave distance measuring device based on relative sampling, which has the advantages of simple structure, high precision and low cost. The device is provided with a frequency control module, a microwave module and a signal processing module, wherein the frequency control module is provided with a main clock signal generator, a main path pulse forming circuit, a sampling clock signal generator and a sampling pulse forming circuit; the microwave module is provided with a local oscillator, a main path switch, a sampling switch, a power amplifier, a low noise amplifier, a filter, a coupler, a transmitting frequency mixer, a receiving frequency mixer and an antenna; and the signal processing module is provided with a transmitting peak value detector, a receiving peak value detector, an OR gate circuit, a microcontrollerand a display. By the sampling signal, of which the period is nearly equal to that of the receiving signal, the relation-based sampling of the transmitting signal and the receiving signal is carried out, so that the expansion of the time difference between the transmitting signal and the receiving signal on the time domain is realized, and the highly precise object distance measurement is achieved.

Description

technical field [0001] The invention relates to a microwave distance measuring device, in particular to a microwave distance measuring device based on correlation sampling. It mainly solves the problem that the echo time of pulse radar is short and difficult to measure accurately, so as to realize high-precision, non-contact microwave-based distance measurement. Background technique [0002] Short-range microwave ranging technology is a small radar technology with a detection distance ranging from a few tenths of meters to several hundred meters. It is widely used in industry and commerce, especially suitable for automatic parking, industrial production monitoring and liquid level in tanks. Measurement etc. (1.Wolfgang Weidmann.A high resolution radar for short range automotive application.28 th European Microwave Conference Amsterdam 1998). [0003] The microwave ranging device transmits a microwave signal through the antenna, and when it meets the target to be measured,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/12G01S13/26
Inventor 郭东辉董晓盈
Owner XIAMEN UNIV
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