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    • 2. 发明公开
    • A transducer
    • Umsetzer。
    • EP0254445A1
    • 1988-01-27
    • EP87305932.3
    • 1987-07-03
    • Galasko, Philip Elliot
    • Kruger, Frans JohannesGalasko, Philip Elliot
    • G01D5/243
    • G01N29/036B60C23/0493G01D5/243G01K7/34G01L9/0008G01L17/00G01N2291/0256
    • A passive electrically operable monitoring means has an inherent resistance and a characteristic capacitance and inductance only, so that the monitoring means has a predetermined natural frequency of oscillation. Variations in a physical parameter being monitored by the monitoring means will cause the characteristic capacitance and/or inductance to vary thereby varying the natural frequency of oscillation of the monitoring means. A transducer includes an excitation means (32) for exciting the monitoring means and a sensing means for sensing the natural frequency of oscillation of the monitoring means. The excitation means (32) includes a pulse generating means for exciting the monito­ring means with a string of pulses having a repetition rate suitably lower than the natural frequency of oscillation of the monitoring means so that damped oscillations occur in the monito­ring means.
    • 无源电动可操作的监测装置仅具有固有电阻和特性电容和电感,使得监测装置具有预定的固有振荡频率。 由监视装置监视的物理参数的变化将导致特性电容和/或电感变化,从而改变监视装置的固有振荡频率。 换能器包括用于激励监视装置的激励装置(32)和用于感测监视装置的固有振荡频率的感测装置。 励磁装置(32)包括脉冲产生装置,用于以一串脉冲激励监测装置,该脉冲串具有适当地低于监测装置的固有振荡频率的重复频率,从而在监测装置中发生阻尼振荡。
    • 5. 发明公开
    • Detection of a low pressure condition of a pneumatic vehicle tyre
    • Feststellung eines Unterdruckzustandes eines Fahrzeugluftreifens。
    • EP0108176A1
    • 1984-05-16
    • EP82305912.6
    • 1982-11-05
    • Galasko, Philip Elliot
    • Kruger, Frans JohannesGalasko, Philip Elliot
    • B60C23/00
    • B60C23/0428
    • A tyre pressure warning device including an oscillatory circuit (16) mounted on the rim of a vehicle wheel (12). A pressure sensing device (14) adjusts the natural frequency of oscillations of the circuit (16) according to the tyre (10) pressure. The circuit (16) is driven into oscillation by a transmitting coil (20) and the frequency of oscillation is sensed via a coil (22) and electrical circuits (30), (32), (34) and (36), which give a visual or audible signal which can be arranged to control automatically the inflation or deflation of the tyre (10). The device is arranged to selectively measure the conditions of two or more tyres of a vehicle.
    • 一种轮胎压力警告装置,包括安装在车轮(12)的轮缘上的振荡电路(16)。 压力检测装置(14)根据轮胎(10)的压力来调节电路(16)的振荡的固有频率。 电路(16)由发射线圈(20)驱动振荡,经由线圈(22)和电路(30),(32),(34)和(36)检测振荡频率, 视觉或听觉信号,其可以被布置成自动控制轮胎(10)的充气或放气。 该装置被布置成选择性地测量车辆的两个或更多个轮胎的状况。