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    • 3. 发明授权
    • Electret devices for measuring ionizing radiation
    • 用于测量电离辐射的驻极体装置
    • US4401891A
    • 1983-08-30
    • US226760
    • 1981-01-21
    • Jacques LewinerGerard DreyfusDidier Perino
    • Jacques LewinerGerard DreyfusDidier Perino
    • G01T1/14G01T1/142G01T1/18
    • G01T1/142
    • The device comprises, on the one hand, a cassette containing an electret between two electrodes and, on the other hand, a fixed reader adapted to receive the cassette in a pocket, to identify it, to measure the charge of its electret and to display data relating to this charge. This reader comprises also a head adapted to record the data on an area (or strip) of the cassette and there are provided readers independent of the aforesaid reader adapted to subsequently receive the cassette, to measure the charge of its electret, to read the data and, by difference between the measured value and that read, to display the radiation dose received by the cassette since its recording.
    • 该装置一方面包括在两个电极之间包含驻极体的盒,另一方面,包括适于将盒子收纳在口袋中的固定读取器,以识别它,以测量其驻极体的电荷并显示 与此费用有关的数据。 该阅读器还包括头部,其适用于将数据记录在盒的区域(或条带)上,并且提供独立于上述读取器的读取器,其适于随后接收盒式磁带,以测量其驻极体的电荷,以读取数据 并且通过测量值和读取之间的差异来显示由于记录而被盒子接收的辐射剂量。
    • 6. 发明授权
    • Devices adapted to detect variations in magnetic flux notably circuit
breakers
    • 适用于检测磁通量变化的装置,特别是断路器
    • US4285022A
    • 1981-08-18
    • US58261
    • 1979-07-17
    • Jacques LewinerGerard DreyfusDidier Perino
    • Jacques LewinerGerard DreyfusDidier Perino
    • G01R33/02G01R15/18H01H59/00H01H83/02H01H83/14H02H3/33
    • H01H83/144H01H59/00H02H3/33H01H2059/009
    • The device detects variations in magnetic flux so that the passage through a given threshold by the amplitude of such a variation per unit time is manifested by the movement of an element adapted to trigger an action. It comprises a practically closed electrical circuit, such as a winding, arranged and mounted so that the variation in magnetic flux to be detected generates by induction at the terminals of this winding an electrical voltage V, two electrodes forming a capacitor, one of which is movable with respect to the other, an electret interposed between these two electrodes and whose charge produces a field exerting on these electrodes an electrostatic force H tending to bring them mutually together, means for forming a rectified voltage U from said voltage V and for applying this voltage U between the two electrodes in a direction such that the field which results therefrom is opposite that generated by the electret and hence tends to reduce the force H, and means urging the movable electrode scarcely reversibly in the opposite direction to the force H. The force G of these urging means and the charge of the electret are selected so that the overshoots by the voltage U of a predetermined threshold U.sub.o corresponding to the level to be detected of the magnetic flux-generating phenomenon cause swings of the movable electrode from its vigilance position to its active position, the triggering of said action being servocoupled to said swings.
    • 该装置检测磁通量的变化,使得通过适应于触发动作的元件的移动来表示通过每单位时间的这种变化幅度的给定阈值的通过。 它包括几乎闭合的电路,例如绕组,布置和安装,使得待检测的磁通量的变化通过在该绕组的端子处的感应产生电压V,形成电容器的两个电极,其中之一是 相对于另一个可移动,插入在这两个电极之间的驻极体,并且其电荷产生在这些电极上施加趋向于使它们相互连接在一起的静电力H的场,用于从所述电压V形成整流电压U的装置, 两个电极之间的电压U使得由此产生的场与由驻极体产生的场相反,因此倾向于降低力H的方向,并且在与力H相反的方向上几乎不可逆地推动可动电极的装置。 选择这些推动装置的力G和驻极体的电荷,使得由预定的电压U的过冲 保持对应于待检测的磁通量产生现象的水平的Uo导致可动电极从其警戒位置的摆动到其活动位置,所述动作的触发被伺服耦合到所述摆动。