Instrument and method for processing a doppler measurement signal

A technology for measuring signals and instruments, which is applied in the field of Doppler measurement and can solve the problem of not removing spectral spurious signals.

Active Publication Date: 2012-09-26
HACH CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent does not address the problem of removing substantially symmetrical spectral artifacts as provided by this patent application
Furthermore, this patent does not teach the symmetric application of thresholding to

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  • Instrument and method for processing a doppler measurement signal
  • Instrument and method for processing a doppler measurement signal
  • Instrument and method for processing a doppler measurement signal

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Embodiment Construction

[0083] figure 1 -20 and the following description describe specific examples to teach those skilled in the art how to make and use the best mode of the invention. In order to teach inventive principles, certain conventional aspects have been simplified or omitted. Those skilled in the art will recognize variations from these examples that fall within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. As a result, the invention is not to be limited by the specific examples described below, but only by the claims and their equivalents.

[0084] figure 1A Doppler measurement instrument 100 according to an embodiment of the invention is shown. Doppler measurement instrument 100 includes meter electronics 110 and sensor probe 106 coupled to meter electronics 110 by cable 107 or other signal transmission device. The meter electronics 110 generates ...

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Abstract

The invention relates to an instrument and method for processing a doppler measurement signal. The instrument (100) is provided according to an embodiment of the invention. The instrument (100) includes an interface (101) configured to receive a Doppler measurement signal and a processing system (112) coupled to the interface (101) and receiving the Doppler measurement signal. The processing system (112) is configured to generate a two-sided velocity spectrum including a plurality of discrete frequency bins from the Doppler measurement signal, with the two-sided velocity spectrum distinguishing spectral elements, and process one or more velocity spectrum bin pairs against a plurality of local gate thresholds, with the one or more velocity spectrum bin pairs being substantially symmetrically located about one or more carrier wave bins and wherein each velocity spectrum bin pair is processed against a corresponding local gate threshold of the plurality of local gate thresholds.

Description

technical field [0001] The present invention relates to the field of Doppler measurements, and in particular to processing Doppler measurement signals. Background technique [0002] There are instruments that measure fluid velocity by emitting an ultrasonic carrier signal that echoes in the flowing liquid or at particulate matter carried on it and that is shifted in its mean frequency due to the Doppler effect return in case. Other instruments use microwave energy, and it is believed that the Doppler-shifted return energy is due to Bragg scattering. A common use of such instruments is to measure open channel flow in, for example, waste water collection sewers. This type of instrument estimates fluid velocity from the observed Doppler shift. [0003] Doppler shift may include a frequency shift of the reflected signal relative to the original transmitted signal due to motion of objects towards or away from the Doppler transmitter device. The Doppler shift can then be proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/58G01S7/539
CPCG01P5/241G01F15/068G01S15/58G01F15/06G01F1/66G01F1/002G01F1/663
Inventor D.L.里克
Owner HACH CO
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