Unlock instant, AI-driven research and patent intelligence for your innovation.

Single-transceiver ultrasonic flow meter apparatus and methods

A technology of measuring equipment and measuring methods, applied in the direction of measuring flow/mass flow, liquid/fluid solids measurement, instruments, etc., to achieve the effect of reducing costs

Active Publication Date: 2015-01-21
TEXAS INSTR INC
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the measurement of TOF only considers the vector component v along the measurement paths 135A and 135B of the fluid flow rate U

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single-transceiver ultrasonic flow meter apparatus and methods
  • Single-transceiver ultrasonic flow meter apparatus and methods
  • Single-transceiver ultrasonic flow meter apparatus and methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 2 A fluid flow measurement device 205 employing a single beamforming ultrasound transducer array 210 is shown in accordance with various exemplary embodiments. Transducer array 210 includes individually selectable ultrasonic transducer elements and is mountable at a single location on wall 212 of conduit 214 . Fluid flow measurement device 205 provides feedback from transducer element array 210 (e.g., beam path segments 220 and 224 associated with beam paths 220-222-224 and beam path segments 230 and 234 associated with beam paths 230-232-234). ) Directional control of ultrasonic energy transmitted and received at transducer element array 210 .

[0030] The transducer elements of the single beamforming ultrasound transducer array 210 include bulky piezoelectric transducer elements, capacitive micromachined ultrasound transducer (CMUT) elements, piezoelectric micromachined ultrasound transducer (PMUT) elements, or Combinations thereof, as described further below...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Elements of a single beam-forming array (210) of ultrasonic transducer elements are selectively activated to direct two or more ultrasonic beams (220-222-224-230-232-234) to a series of acoustic mirrors (255, 260, 265) mounted to or fabricated at known locations at an inside surface of a pipe (214). The ultrasonic beams (220-222-224-230-232-234) traverse measurement path segments (224, 234) at known angles through a fluid flowing through the pipe (214) before being received back at the single transducer array (210). Fluid flow velocity along the fluid flow path is calculated as a function of a difference in time-of-flight (TOF) along first and second ultrasonic beam paths (220-222-224, 230-232-234) after subtracting TOF components contributed by known-length non-measurement path segments (220, 230, 222, 232). The difference in TOF results from an additive downstream fluid flow velocity vector component along a first measurement path segment (224) and a subtractive upstream fluid flow velocity vector component along a second measurement path segment (234).

Description

technical field [0001] The structures and methods described herein relate to the measurement of fluid flow velocity in pipes and conduits, including comparing the time-of-flight (TOF) of ultrasonic pulses sent through the fluid to detect downstream fluid velocity and upstream fluid velocity contributions to TOF. Background technique [0002] Figure 1 shows a prior art schematic diagram of a fluid flow measurement technique according to the prior art. The first ultrasonic transducer 110 is located at a wall 115 upstream of the duct 120 and the second ultrasonic transducer 125 is located at a wall 130 downstream of the duct 120 . [0003] A first ultrasonic signal is transmitted from upstream transducer 110 and received at downstream transducer 125 through path 135A. The time-of-flight (TOF) T(1,2) between transmission and reception of the first ultrasound signal is measured. A second ultrasonic signal is transmitted from downstream transducer 125 and received at upstream tr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66
Inventor M·西威尔M·威特茨
Owner TEXAS INSTR INC