公开(公告)号：US10605784B2

公开(公告)日：2020-03-31

申请号：US15413237

申请日：2017-01-23

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Yoseph Bar-Cohen ,  Mircea Badescu ,  Shyh-Shiuh Lih ,  Stewart Sherrit ,  Nobuyuki Takano ,  Patrick N. Ostlund ,  Hyeong Jae Lee ,  Xiaoqi Bao

IPC: H01L41/053 ,  G01N29/22 ,  B06B1/06 ,  B06B1/02 ,  G01N29/24 ,  B06B3/00 ,  G01F23/296

Abstract: A high temperature ultrasonic probe and a mounting fixture for attaching and aligning the probe to a steam pipe using blind alignment. The high temperature ultrasonic probe includes a piezoelectric transducer having a high temperature. The probe provides both transmitting and receiving functionality. The mounting fixture allows the high temperature ultrasonic probe to be accurately aligned to the bottom external surface of the steam pipe so that the presence of liquid water in the steam pipe can be monitored. The mounting fixture with a mounted high temperature ultrasonic probe are used to conduct health monitoring of steam pipes and to track the height of condensed water through the wall in real-time.

公开(公告)号：US09586234B2

公开(公告)日：2017-03-07

申请号：US14259893

申请日：2014-04-23

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Yoseph Bar-Cohen ,  Mircea Badescu ,  Shyh-Shiuh Lih ,  Stewart Sherrit ,  Nobuyuki Takano ,  Patrick N. Ostlund ,  Hyeong Jae Lee ,  Xiaoqi Bao

IPC: H01L41/08 ,  B06B1/06 ,  B06B1/02 ,  B06B3/00

CPC classification number: G01N29/223 ,  B06B1/0215 ,  B06B1/0644 ,  B06B3/00 ,  G01F23/2962 ,  G01N29/228 ,  G01N29/2437 ,  G01N2291/011 ,  G01N2291/044 ,  G01N2291/101 ,  H01L41/053

Abstract: A high temperature ultrasonic probe and a mounting fixture for attaching and aligning the probe to a steam pipe using blind alignment. The high temperature ultrasonic probe includes a piezoelectric transducer having a high temperature. The probe provides both transmitting and receiving functionality. The mounting fixture allows the high temperature ultrasonic probe to be accurately aligned to the bottom external surface of the steam pipe so that the presence of liquid water in the steam pipe can be monitored. The mounting fixture with a mounted high temperature ultrasonic probe are used to conduct health monitoring of steam pipes and to track the height of condensed water through the wall in real-time.

Abstract translation: 高温超声波探头和安装夹具，用于使用盲目对准将探头连接和对准蒸汽管。 高温超声波探头包括具有高温的压电换能器。 探头提供发送和接收功能。 安装夹具允许高温超声波探头精确地对准蒸汽管的底部外表面，从而可以监测蒸汽管中液态水的存在。 带安装高温超声波探头的安装夹具用于对蒸汽管道进行健康监测，并实时跟踪冷凝水通过墙壁的高度。

公开(公告)号：US10578480B2

公开(公告)日：2020-03-03

申请号：US15957495

申请日：2018-04-19

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Yoseph Bar-Cohen ,  Shyh-Shiuh Lih ,  Hyeong Jae Lee ,  Mircea Badescu

IPC: G01F23/296

Abstract: A multi-probe system for real-time measurement of a fluid level in a pipe with steady-state and turbulent flow conditions is presented. The multi-probe system includes a plurality of multiplexed transducers attached in a non-destructive fashion to walls of the pipe. Multiplexing of the transducers activate and deactivate the transducers in sequence to generate independent pairs of transmit and receive wave signals through the pipe. Each transmit and receive signal pair can be used to independently establish a time-of-flight from the transducer and back to the transducer as reflected by a surface of the fluid. The transducers can be arranged as longitudinal and/or circumferential arrays on the walls of the pipe. An algorithm that determines the time-of-flight eliminates received signals having an energy level lower than or equal to a predefined minimum energy level and eliminates any time-of-flight that is shorter than a minimum threshold time.