发明授权
- 专利标题: Ultrasonic flow sensor with quadrature demodulation
- 专利标题(中): 超声波流量传感器具有正交解调功能
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申请号: US12042369申请日: 2008-03-05
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公开(公告)号: US07637171B2公开(公告)日: 2009-12-29
- 发明人: Jiawei Zhang , Bernhard Opitz , Michael Horstbrink , Tobias Lang , Axel Wenzler
- 申请人: Jiawei Zhang , Bernhard Opitz , Michael Horstbrink , Tobias Lang , Axel Wenzler
- 申请人地址: DE Stuttgart
- 专利权人: Robert Bosch GmbH
- 当前专利权人: Robert Bosch GmbH
- 当前专利权人地址: DE Stuttgart
- 代理商 Michael J. Striker
- 优先权: DE102007027188 20070613
- 主分类号: G01F1/66
- IPC分类号: G01F1/66
摘要:
An ultrasonic flow sensor, in particular for determining the flow velocity of a medium flowing through a pipeline, has at least one ultrasonic converter for transmitting and/or receiving ultrasonic signals, an oscillator, which is connected with the ultrasonic converter, and an evaluation unit, which determines a phase shift of the ultrasonic signal that was received, with respect to a reference signal. The evaluation unit includes a plurality of quadrature demodulators, which operate with different demodulation frequencies and each determine phase information about the ultrasonic signal that was received, and when a vernier unit is provided, which determines—based on the individual pieces of phase information—a phase angle or a quantity proportional thereto.
公开/授权文献
- US20080307895A1 ULTRASONIC FLOW SENSOR WITH QUADRATURE DEMODULATION 公开/授权日:2008-12-18