High precision low-power consumption radar liquid level instrument system

A low-power, high-precision technology, applied in the transmission system, wired transmission system, radio wave measurement system, etc., can solve the problems of low distance measurement accuracy of ultrasonic liquid level gauge, expensive radar, difficult instrument maintenance, etc.

Inactive Publication Date: 2008-10-08
周建明
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  • Application Information

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Problems solved by technology

The glass plate liquid level gauge, magnetic flap liquid level gauge, static pressure liquid level gauge, etc. currently used for liquid level measurement in my country have low ranging accuracy, poor stability, high power consumption, and require regular maintenance. Ultrasonic liquid level gauges The accuracy of distance measurement is low, and the technology of float level gauge is aging
At present, the imported radar is expensive, which brings great economic pressure to domestic users, and it is difficult to maintain foreign instruments

Method used

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  • High precision low-power consumption radar liquid level instrument system
  • High precision low-power consumption radar liquid level instrument system
  • High precision low-power consumption radar liquid level instrument system

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Embodiment Construction

[0036] 5.1 Implementation scheme of low power consumption and high precision radar liquid level instrument system

[0037] This system is used in the petroleum industry and water conservancy field. Since the system is installed in the oil tank, in order to meet the industrial standard of intrinsic safety, there are strict requirements on the power consumption of the system. The power consumption of the system must be less than 40mW. At the same time, the system needs to reach The accuracy is very high. In order to meet these two requirements, the following measures are adopted: try to select devices with low power consumption; use special system control and signal processing mechanisms. The following will introduce one by one. The whole structure of the low-power high-precision radar level gauge system is as follows: figure 1 As shown, the system is divided into three parts: HART board 1, measurement board 2 and measurement line 3, in which the HART board completes the commu...

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Abstract

The invention relates to the technical field of high-precision and low-consumption radar distance measurement, comprising a Hart module, a measuring module and a measuring line. The distance measurement of the system is based on TDR principle, adopting double DDS to generate two-way precise timing clock and realizing amplified time proportion of echo pulse, with a distance measuring precision of 5 mm; ultra wideband narrow pulse signal realizes high resolution of distance measurement, with a resolution of 1 mm; the proposal for working at intervals of the system greatly reduces power consumption which is 40 mW, in accordance with industrial standard of intrinsic safety.

Description

1. Technical field [0001] The invention relates to a high-precision and low-power radar ranging system. The system covers the technical fields of digital signal processing, microwave transceiver system, ultra-wideband signal generation and low-power solutions, and uses the TDR principle to accurately measure the distance between the transmitted pulse and the echo pulse. Time difference to get the target distance. The system can be applied to high-precision ranging fields such as petroleum and water conservancy. 2. Background technology [0002] Most of the radar level gauges use the traditional radar system - linear frequency modulation continuous wave system, which is suitable for short-distance high-power ranging occasions, does not require complex digital signal processing, and has a simple structure. At present, some foreign companies or domestic research institutes develop radar liquid level gauges, such as SAAB, KROHNE and HYControl. In recent years, the Russian Sim ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/22G01S13/88H04B3/00H04L29/06H03K3/00H03K5/01
Inventor 周建明
Owner 周建明
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