Title:
ACOUSTIC TEMPERATURE MEASURING METHOD AND ITS APPARATUS
Document Type and Number:
Japanese Patent JPH0560622
Kind Code:
A
Abstract:
PURPOSE:To improve the temperature measuring accuracy by storing a reference reflecting wave and a reflecting wave at the measuring time within a sound wave sensor, and detecting the propagating time based on the stored reflecting waves. CONSTITUTION:One or more sound wave sensors are provided at a side wall 29 of a duct wherein a high temperature fluid runs. The propagating time of sound waves from a sound wave transmitter 30 through the fluid to a sound wave receiver 31 is detected at 12, and the propagating time when the sound waves are reflected in the sensors is detected at 52. The temperature of the fluid is calculated at 27 from the relationship of the propagating time and the distance of a propagating route. Before measuring, a reference reflecting waveform in the sensors when the duct is at ordinary temperatures is stored in a reflecting wave memory 26, and the reflecting waves in the sensors at the measuring time are stored in a detecting wave memory 11. A reaching time corrector 51 consequently adjusts the time, and a temperature operator 27 calculates the propagating time within the duct and converts to the temperature.
Inventors:
IMADA NORIYUKI
YOSHIZAKO HIDEHISA
YOSHIZAKO HIDEHISA
Application Number:
JP22311991A
Publication Date:
March 12, 1993
Filing Date:
September 03, 1991
Export Citation:
Assignee:
BABCOCK HITACHI KK
International Classes:
G01K11/24; (IPC1-7): G01K11/24
Attorney, Agent or Firm:
Kawakita Takecho
Next Patent: JPH0560623