发明授权
US5406854A Apparatus for measuring small flows of a fluid bearing ultrasound
reflecting bits, on the high frequency ultrasonic doppler principle
失效
用于测量流体承载超声反射比特的小流量的装置，在高频超声波多普勒原理上
- 专利标题： Apparatus for measuring small flows of a fluid bearing ultrasound reflecting bits, on the high frequency ultrasonic doppler principle
- 专利标题（中）： 用于测量流体承载超声反射比特的小流量的装置，在高频超声波多普勒原理上
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申请号： US894075申请日： 1992-06-05
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公开(公告)号： US5406854A公开(公告)日： 1995-04-18
- 发明人: Georg F. Wagner
- 申请人： Georg F. Wagner
- 申请人地址： DEX Berchtesgaden
- 专利权人： Wagner; Louise
- 当前专利权人： Wagner; Louise
- 当前专利权人地址： DEX Berchtesgaden
- 优先权： DEX4118809.8 19910607; DEX4118827.6 19910607; DEX4207031.7 19920306
- 主分类号： G01F1/66
- IPC分类号： G01F1/66 ; G01P5/24 ; G01S15/58 ; G01W1/00
摘要：
An apparatus for measuring small liquid and particle currents on the high-frequency ultrasonic Doppler principle, has three sound transducers (5, 6, 7) directed jointly either in or against the direction of flow (2), distributed over the circumference of the measuring tube (1). One transducer (5) is a transmitter and the two others (6, 7) are receivers. Two mixers (16, 17) are inserted between the transmitter and the two receivers for producing a differential signal from the master frequency and receiving frequency. A third mixer (18) is provided for producing a signal from the differential signal from the first mixer (16) and the differential signal from the second mixer (17).
公开/授权文献
- US5850778A Pressure indicator 公开/授权日：1998-12-22
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