PHYSICAL QUANTITY MEASURING DEVICE

• Main Authors: TAKAKURA YUYA, MIYOSHI ASAKO, NAWA MOTOYUKI, NAKABAYASHI YUJI, MATSUDA MASAYOSHI, SATO MASATO
• Format: Patent
• Language: English; Japanese
• Published: 01.08.2022
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

To provide a physical quantity measuring device with which, by suppressing water droplets from sticking to an ultrasonic transceiver, it is possible to measure the flow rate or concentration of the fluid of a gas that contains droplets.SOLUTION: Ultrasonic transceivers 4, 5 are arranged by being accommodated inside of opening holes 6, 7 provided in a measurement passage 1, and outer circumferences 4a, 5a of the ultrasonic transceivers 4, 5 are provided, between the inner circumferential walls 6a, 7a of the opening holes 6, 7, with a space part 13 having a prescribed distance T, the distance T of the space part 13 being adjusted to a length suitable for preventing the occurrence of droplet linkage due to liquid drops such as water droplets entering between the outer circumferences 4a, 5a of the ultrasonic transceivers 4, 5 and the inner circumferential walls 6a, 7a of the opening holes 6, 7. Thus, indirect contact between the ultrasonic transceivers 4, 5 and the opening holes 6, 7 is blocked, and the propagation of ultrasonic waves to a housing that causes leakage of vibration from the ultrasonic transceivers 4, 5 to a passage housing 11 is prevented, for a fluid that contains liquid drops too, making it possible to secure measurement reliability and maintain measurement accuracy.SELECTED DRAWING: Figure 2 【課題】超音波送受信器への水滴の付着を抑制することで液滴を含む気体の流体の流量や濃度などの計測が可能な物理量計測装置を提供すること。【解決手段】超音波送受波器４、５は、計測流路１に設けた開口穴６、７内に収納配置し、超音波送受波器４、５の外周４ａ、５ａは開口穴６、７の内周壁６ａ、７ａとの間に所定の距離Ｔを有する空間部１３を設けるとともに、空間部１３の距離Ｔは超音波送受波器４、５の外周４ａ、５ａと開口穴６、７の内周壁６ａ、７ａとの間に入り込む水滴等の液滴による液滴連結の発生を防止する長さとすることで、超音波送受波器４、５と開口穴６、７との間接接触を阻止し、液滴を含む流体に対しても超音波送受波器４、５から流路筐体１１へ振動が漏れる超音波の筐体への伝搬を防止して、計測の信頼性確保と計測精度の維持が可能となる。【選択図】図２