Ultrasonic measuring method and ultrasonic measuring device for double acoustic path gas flow

The invention relates to an ultrasonic measuring method and an ultrasonic measuring device for double acoustic path gas flow. Two pairs of energy transducers are adopted for respectively measuring the propagation time, perpendicular to the gas flow direction, of ultrasonic waves as well as the count...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ZHAO WEIGUO, CHEN ZUSHOU, ZHANG SHENGYI, HUANG XIANGKE, TAN HONGWEI
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The invention relates to an ultrasonic measuring method and an ultrasonic measuring device for double acoustic path gas flow. Two pairs of energy transducers are adopted for respectively measuring the propagation time, perpendicular to the gas flow direction, of ultrasonic waves as well as the counter flow propagation time and the downstream propagation time of the ultrasonic waves, obtaining the actual acoustic speed of the ultrasonic eaves in a gas medium and finally obtaining the gas flow. The measuring device comprises a singlechip microcomputer unit, a time measuring unit, a driving unit, a signal conditioning unit and the two pairs of energy transducers arranged on a pipeline; one pair of energy transducers is symmetrically arranged by taking a pipeline axis as a symmetric axis; the other pair of energy transducers is respectively arranged on the upstream side and the downstream side of the pipeline; the singlechip microcomputer unit is connected with the driving unit through the time measuring unit; the driving unit is respectively connected with the two pairs of energy transducers; three energy transducers are respectively connected with the time measuring unit through the signal conditioning unit. According to the ultrasonic measuring method and the ultrasonic measuring device disclosed by the invention, the influence of the temperature, the pressure, the humidity, components and other factors on a measuring value of gas flow is eliminated, and the obtained gas flow value is high in accuracy and is wide in application range.