Linear frequency modulation continuous wave radar water level telemeasuring device and method

Abstract

The invention discloses a linear frequency modulation continuous wave radar water level telemeasuring device and method. The linear frequency modulation continuous wave radar water level telemeasuring device comprises a radar transceiver, a radar signal screening and amplifying circuit and a microcontroller; the radar transceiver comprises a phase-locked loop, a transmitting antenna, a first mixer and a receiving antenna, wherein the output end of the phase-locked loop is connected with the transmitting antenna, and a linear frequency modulation signal output by the output end of the phase-locked loop is transmitted through the transmitting antenna; two input ends of the first mixer are connected with the output end of the phase-locked loop and the receiving antenna respectively, and an echo signal is received through the receiving antenna; the output end of the first mixer is connected with the input end of the radar signal screening and amplifying circuit, the output end of the radar signal screening and amplifying circuit is connected with an ADC sampling end of the microcontroller, and sampling processing is carried out on the signal output by the output end of the radar signal screening and amplifying circuit through the microcontroller. The linear frequency modulation continuous wave radar water level telemeasuring device can effectively overcome the influence of temperature drift, ensure linearity of the transmitting frequency of the radar transceiver and effectively improve measuring precision of a radar water level indicator.

Description

technical field [0001] The invention relates to a radar water level measuring device, in particular to a linear frequency modulation continuous wave radar water level remote measuring device and method. Background technique [0002] With the development and progress of hydrological monitoring technology, the non-contact water level measurement method has attracted widespread attention due to its advantages of fast, safe, high precision and wide application range. The radar water level measurement equipment adopts non-contact water level measurement method, no need to set up a still water well, and is not affected by debris in the water. It has high measurement accuracy and can be applied to flat water tests with many floating objects, large sand content, and poor water quality conditions. , Flood monitoring, high flood rush measurement, dangerous water regime measurement and other special work, it has played a great role in the main purpose of flood control measurement, and ...

AI Technical Summary

Problems solved by technology

However, there are two problems with this method. One is that there is often hysteresis in temperature measurement, especially in the case of large temperature changes, resulting in a mismatch of VCO curves, resulting in measurement errors

The second is that the inherent VCO characteristics of each radar transceiver are more or less different. In this case, it takes a lot of work to measure the VCO curve of each radar transceiver

There are three main problems in this way: one is the matching of the data transmission protocol and collection method between the telemetry terminal and the water level measurement equipment, which increases the difficulty of technology development and equipment debugging time; the other is that this method is not conducive to flood season and high flood Applications such as measurement that require frequent changes in measurement methods

The third is that the radar water level gauge software cannot be remotely updated and upgraded. In order to complete the function upgrade of the radar water level gauge, it is necessary to go to the site to operate

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