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129 条记录 (耗时 0.013 秒)

    Method and device for determining physical state parameters of a medium
    72.
    发明公开
    Method and device for determining physical state parameters of a medium 失效
    用于确定介质的物理状态参数的方法和装置

    公开(公告)号：EP0502197A4

    公开(公告)日：1993-03-31

    申请号：EP91915496

    申请日：1991-08-23

    申请人： VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT PRIRODNYKH GAZOV (VNIIGAZ)

    发明人： SARVAZIAN, ARMEN PORUIROVICH, MIKRORAION"AB",9-36 ,  BELONENKO, VLADIMIR NIKOLAEVICH, ,  CHALIKIAN, TIGRAN VANIKOVICH

    IPC分类号： G01L9/00 ,  G01K7/32 ,  G01K11/22 ,  G01N29/00 ,  G01N29/02 ,  G01N29/036 ,  G01N29/22 ,  G01N29/32 ,  G01L9/08

    CPC分类号： G01N29/036 ,  G01N29/02 ,  G01N29/222 ,  G01N29/326 ,  G01N2291/014 ,  G01N2291/02872 ,  G01N2291/02881

    摘要： A method for determining physical state parameters of a medium involves measuring physical properties of a medium while oscillations are generated in a standard medium element and then the dependence of one of the characteristics of the oscillation process on the parameter to be determined is found, the standard element is put into contact with the medium to be analyzed and oscillations are again generated in the element. The value of the state parameter being determined is established from the change of the oscillation process characteristic in the standard medium element. The generated oscillations are of modulated, ultrasonic or hypersonic nature. The resonance frequency or the quality, the passage speed or absorption factor of the oscillations are used as the characteristics to be measured, the relaxation frequency of the standard medium is found and the state parameters of the analyzed medium are determined, for example, by the relaxation frequency shift. The standard medium used is a liquid medium, a magnetorheologic and or electrorheologic medium. A device implementing said method comprises a hollow casing (21) with an opening (22) in its wall, acoustic oscillation converters (23) provided with electrodes (24, 25) and mounted on the end faces of the casing (21) so as to form together with the latter, a measuring chamber (25), and fastening elements (27). Each acoustic oscillation converter (23) is rigidly secured, along the periphery, between the end face of the casing (2) and the fastening element (27). The surface of each acoustic oscillation converter (23), contacting the analyzed fluid, consists of a continuous electrode (24), and the opposite surface of the converter (23) consists of an electrode (25) coaxial to the measuring chamber (26) and coinciding with its diameter. The casing may contain more than one measuring chamber.

    Elektronisches Thermometer
    73.
    发明公开
    Elektronisches Thermometer 失效
    电子温度计

    公开(公告)号：EP0325685A3

    公开(公告)日：1990-05-23

    申请号：EP88110515.9

    申请日：1988-07-01

    申请人： Heraeus Sensor GmbH

    发明人： Ziegler, Horst, Prof. Dr. ,  Behlen, Horst

    IPC分类号： G01K7/32 ,  G01K13/04 ,  H03H9/10

    CPC分类号： G01K7/32 ,  G01K1/024 ,  Y10S336/02

    摘要： Ein elektronisches Thermometer weist einen Oszillator auf, dessen frequenzbestimmendes Glied ein als Meßsonde ausgebildetes temperatursensitives piezoelektrisches Element ist, das in einem abgeschlossenen Gehäuse angeordnet ist; das piezoelektrische Element ist mit zwei Anschlußelektroden versehen, die über ein induktiv gekoppeltes Spulenpaar von der Oszillatorschaltung galvanisch getrennt sind, wobei die mit den Anschlußelektroden verbundene Spule von dem Gehäuse dicht umschlossen ist; an die Oszillatorschaltung ist eine Auswerteeinheit zur Ermittlung der Temperatur angeschlossen.

    摘要翻译： 电子体温计具有振荡器，其频率确定元件是被设计为测量探针的热敏压电元件，其设置在封闭的壳体中; 所述压电元件设置有两个端子电极，所述两个端子电极经由感应耦合的一对线圈与所述振荡器电路电流隔离，连接到所述端子电极的所述线圈由所述壳体密封; 用于确定温度的评估单元连接到振荡器电路。

    Temperature sensor
    75.
    发明公开
    Temperature sensor 失效

    公开(公告)号：EP0098651A2

    公开(公告)日：1984-01-18

    申请号：EP83200967.4

    申请日：1983-06-29

    申请人： Philips Electronics N.V.

    发明人： Franx, Cornelis

    IPC分类号： G01K7/32

    CPC分类号： G01K7/32

    摘要： A temperature sensor having an oscillator circuit comprising a plate-shaped quartz crystal resonator formed using a cut rotated singly through an angle Θ about the X axis, Θ being in one of the ranges -29° to -16° and +39° to +45°, and electrodes are provided on the major surfaces of the resonator to make the resonator vibrate in a thickness shear mode at a frequency which varies substantially linearly in a selected temperature range.