Pulsed radar level gauge with improved resistance to signal disturbance
A technology of radar level gauge and signal interference, which is applied in the directions of engine lubrication, radio wave reflection/re-radiation, re-radiation, etc., can solve the problems of pulse radar level gauge system performance degradation, etc., and increase the possibility Effect
Pending Publication Date: 2021-11-26
ROSEMOUNT TANK RADAR
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Problems solved by technology
It has been found that the performance of pulsed radar level gauge systems may be degraded due to interference from other sources of electromagnetic signals
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[0035] In this detailed description, various embodiments of the invention are discussed primarily with reference to a pulsed radar level gauge system having a signal propagation device in the form of a probe and wireless communication capabilities.
[0036] It should be noted that this in no way limits the scope of the invention, which also covers pulsed radar level gauge systems with additional types of signal propagation means (e.g., radiating antennas) and configurations for wired communication (e.g., using 4mA to 20mA current loop and / or other wired communication methods) pulse radar level gauge system.
[0037] figure 1 An exemplary radar level gauge system 1 of the GWR (Guided Wave Radar) type is schematically shown mounted at a tank 3 having a tubular mounting structure 5 (commonly called for "nozzles").
[0038] A radar level gauge system 1 is installed to measure the fill level of a product 7 in a tank 3 . The radar level gauge system 1 comprises a measuring unit 9...
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A method of determining a filling level of a product in a tank is provided. The method comprises, for each transmit pulse repetition frequency in a sequence of different transmit pulse repetition frequencies: generating and transmitting an electromagnetic transmit signal in the form of a pulse train of transmit pulses, the pulse train exhibiting the transmit pulse repetition frequency; propagating the transmit signal towards a surface of the product in the tank; returning an electromagnetic reflection signal resulting from reflection of the transmit signal at the surface back towards the transceiver; receiving the reflection signal; determining a measure indicative of signal disturbance of the reflection signal; evaluating the measure indicative of signal disturbance of the reflection signal in view of a predefined signal disturbance criterion; and determining the filling level based on at least one of the reflection signals fulfilling the signal disturbance criterion.
Description
technical field [0001] The present invention relates to a method of determining a filling level and to a radar level gauge (RLG) system. Background technique [0002] Pulse radar level gauges are a cost-effective and convenient way of measuring the fill level of tanks in many applications (for example, in the process industry). In an environment where pulsed radar level gauge systems are commonly used, there may be many other sources of electromagnetic signals, for example, other pulsed radar level gauge systems. It has been found that the performance of pulsed radar level gauge systems can be degraded due to interference from other sources of electromagnetic signals. Accordingly, it would be desirable to provide improved pulsed radar level gauges, particularly pulsed radar level gauges that are more resistant to signal interference. Contents of the invention [0003] In view of the above, it is a general object of the present invention to provide an improved pulse radar...
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IPC IPC(8): G01F23/284G01S13/88
CPCG01F23/284G01S13/88G01S13/227G01S7/023G01S7/0235G01F23/2845
Inventor 米卡埃尔·埃里克松莱夫·尼尔森哈坎·尼贝里
Owner ROSEMOUNT TANK RADAR