Method and device for measuring flight time of ultrasonic echo

An ultrasonic echo and time-of-flight technology, which is applied in the fields of high-energy physics, laser ranging, radar ranging or front-end electronics, can solve problems such as increasing the complexity of the readout coding circuit, and achieve high time measurement accuracy.

Inactive Publication Date: 2012-03-28
TSINGHUA UNIV
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Problems solved by technology

Another improvement method is to subdivide the fixed delay unit through a delay-locked loop, which can achieve a minimum quantization resolution of 80ps at an 80MHz clock, but this structure increases the complexity of the readout encoding circuit

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  • Method and device for measuring flight time of ultrasonic echo
  • Method and device for measuring flight time of ultrasonic echo
  • Method and device for measuring flight time of ultrasonic echo

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0036] Image 6 Shows the structure of an ultrasonic echo time-of-flight measurement device according to a preferred embodiment of the present invention. The measurement device is mainly composed of three parts. The first part is the signal transceiver part 601, which is responsible for the transmission, reception, channel switching, and timing of ultrasonic signals. Control, received signal preprocessing and other functions; the second part is the digital signal processing part 602, which is responsible for digital-to-analog conversion of the signal, and then digital filtering, denoising, enhancement, edge tracking and other processing, and complete the ultrasonic flight time measurement function; The third part is the human-computer interaction part 603, which is responsible for controlling the display, keyboard and other human-machine interfaces an...

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Abstract

The invention discloses a method and a device for measuring a flight time of ultrasonic echo. The method is performed in the manner of layering time and interpolating. The time measuring range is expanded by adopting the direct counting method in a first layer. The time delay interpolation method is adopted in a second layer. A bran-new two-dimensional matrix manner is adopted on a topological structure. A timing quantization error of the flight time to be measured is further subdivided into two layers. The length of a delay line is shortened so the linear of the delay line is increased. The ps level resolution ratio limitation is broken through because a cursor delay line structure is adopted at 2-2nd Level. For realizing the method, the invention further provides a set of measuring device which comprises a signal receiving and sending part, a digital signal processing part and a man-machine interaction part. The measuring result precision of flight time can be promoted.

Description

Technical field [0001] The invention relates to a method and equipment for measuring the flight time of ultrasonic echo in an ultrasonic flowmeter, which can be applied to the fields of instrumentation, high-energy physics, laser ranging, radar ranging, or front-end electronics. Background technique [0002] Ultrasonic flow meter is a new type of flow meter that uses the flow velocity information of the fluid carried when the ultrasonic signal is propagated in the fluid to calculate the fluid flow. It has the characteristics of non-contact measurement, high measurement accuracy, wide measurement range, and convenient installation and maintenance. It is especially suitable for the measurement of temporary pipeline flow, large diameter pipeline flow and dangerous fluid flow. According to the ultrasonic flow measurement equation, the flow calculation is directly related to the pipe geometry and the fluid flow rate, and the fluid flow rate is directly proportional to the ultrasonic f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/66
Inventor 王伯雄张金罗秀芝崔园园刘涛
Owner TSINGHUA UNIV
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