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    • 3. 发明专利
    • METHOD AND APPARATUS FOR ESTIMATION OF POSITION OF SHOCK WAVE
    • JPH10311773A
    • 1998-11-24
    • JP13593997
    • 1997-05-09
    • NAT AEROSPACE LABKAWASAKI HEAVY IND LTD
    • YANAGI RYOJIKANBE KATSUHIROFUTAMURA HISAOOSHIMA TAKAOENOMOTO KICHIYAUTANO MAKOTO
    • G01M9/00
    • PROBLEM TO BE SOLVED: To estimate or detect the movement amount and the position of a shock wave in real time by using a simple system by a method wherein pressures in an air introduction passage are measured at constant intervals. SOLUTION: A shock-wave-position estimation apparatus is constituted of a pressure measuring part 10 in which pressure sensors 11 in the required number are arranged at prescribed intervals on the sidewall of an air introduction passage (an intake) I, of a shock-wave-position estimation part 20 and of an output part 30. Then, the estimation part 20 is constituted of, a microcomputer, and the position of a shock wave is estimated or the like on the basis of the measured value of the measuring part 10. Then, in the estimation part 20, the differential pressure between pressures of sensors 11B, 11A before and after a sensor 11L which detects the lowest pressure of the measuring part 10, and the lowest pressure is found. A part between 1 and 2 before and after the sensor 11L is proportionally distributed by the differential pressure, and the position of the shock wave is estimated or detected. In this manner, the position of the shock wave can be estimated or detected in real time by a simple processing operation. When the position is estimated or detected continuously, the movement amount of the shock wave can be estimated or detected.