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    • 3. 发明公开
    • VERFAHREN UND VORRICHTUNG ZUR VERBESSERTEN ULTRASCHALL-LAUFZEITDIFFERENZMESSUNG
    • 方法和设备改进的超声时差测量
    • EP2488834A1
    • 2012-08-22
    • EP10742863.3
    • 2010-08-18
    • Robert Bosch GmbH
    • MUELLER, RolandHUEFTLE, GerhardHORSTBRINK, MichaelLANG, TobiasRADWAN, SamiKUENZL, BerndWANJA, Roland
    • G01F1/66
    • G01F1/66
    • The invention relates to a method for measuring the propagation time difference. The method comprises: sending a transmission ultrasound pulse, which is provided with a transmission reference time and comprises an envelope and a carrier frequency, to a spatial region and receiving a reception ultrasound pulse, which corresponds to the transmission ultrasound pulse that was transmitted through the spatial region. A rough time difference is provided as the result a step of comparing the transmission reference time to an envelope of the reception ultrasound pulse for at least two steps of transmitting and receiving that are carried out in opposing transmission directions. A fine time difference is provided as the result of a step of comparing the transmission reference time to a current course of the reception ultrasound pulse for the at least two steps of transmitting and receiving that are carried out in opposing transmission directions. A combination of the fine time differences that are provided for the opposing transmission directions is provided as an individual combination. A combination of the rough time differences that are provided for the opposing transmission directions is also provided as an individual combination. The propagation time difference is obtained as a combination of said individual combinations. The invention further relates to a device comprising a rough comparator, a fine comparator and a combination device for carrying out the method according to the invention.
    • 4. 发明公开
    • ULTRASCHALLWANDLER ZUM EINSATZ IN EINEM FLUIDEN MEDIUM
    • EINEM FLUIDEN MEDIUM中的ULTRASCHALLWANDLER ZUM EINSATZ
    • EP2382618A2
    • 2011-11-02
    • EP09796644.4
    • 2009-11-17
    • Robert Bosch GmbH
    • MUELLER, RolandHUEFTLE, GerhardHORSTBRINK, MichaelLANG, TobiasRADWAN, SamiKUENZL, BerndWANJA, Roland
    • G10K9/22
    • G01P5/24B06B1/0655G01F1/662G10K9/22G10K11/004
    • The invention relates to an ultrasonic transducer (110) for use in a fluid medium. The ultrasonic transducer (110) comprises at least one piezoelectric transducer element (138) and at least one adapting body (140) for facilitating oscillation injection between the piezoelectric transducer element (138) and the fluid medium. The ultrasonic transducer (110) also comprises a housing (112), wherein the piezoelectric transducer element (138) is inserted into the housing (112). The housing (112) has at least one opening (122) which faces the fluid medium, wherein the adapting body (140) is at least partially inserted into the opening (122). The ultrasonic transducer (110) also has at least one sealing element (146) which seals at least one intermediate space (158) between the adapting body (140) and the housing (112) in such a manner that an internal space (128) of the housing (112) is at least largely sealed with respect to the fluid medium.
    • 本发明涉及一种用于流体介质中的超声波换能器(110)。 超声换能器(110)包括至少一个压电换能器元件(138)和至少一个适配体(140),用于促进压电换能器元件(138)和流体介质之间的振荡注入。 超声换能器(110)还包括壳体(112),其中压电换能器元件(138)插入到壳体(112)中。 壳体(112)具有面向流体介质的至少一个开口(122),其中适配体(140)至少部分地插入到开口(122)中。 超声换能器110还具有至少一个密封元件146,该密封元件以这样的方式在适配本体140与壳体112之间密封至少一个中间空间158, 壳体(112)至少在很大程度上相对于流体介质密封。