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    • 14. 发明申请
    • A DEVICE FOR GENERATING X-RAYS HAVING A LIQUID METAL ANODE
    • 用于产生具有液体金属阳极的X射线的装置
    • WO2003077276A1
    • 2003-09-18
    • PCT/IB2003/000681
    • 2003-02-19
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHHARDING, GeoffreyDOORMANN, VolkerDAVID, Bernd
    • HARDING, GeoffreyDOORMANN, VolkerDAVID, Bernd
    • H01J35/08
    • H01J35/18H01J35/08H01J2235/082
    • The invention relates to a device for generating X-rays (31). The device has a source (5) for emitting electrons (27) accommodated in a vacuum space (3). The X-rays are emitted by a liquid metal as a result of the incidence of the electrons. The liquid metal flows through a constriction (13) where the electrons emitted by the source impinge upon the liquid metal. The constriction is bounded by a thin window (23), which is made from a material which is transparent to electrons and X-rays and which separates the liquid metal in the constriction from the vacuum space. According to the invention, the constriction (13) has a cross-sectional area which, seen in a main flow direction (X), increases in such a manner that during operation in said direction, a decrease of a flow velocity takes place such that a decrease of a pressure of the liquid metal in the constriction in said direction, caused by viscous flow losses, substantially corresponds with an increase of said pressure in said direction, which is caused by the Bernoulli effect resulting from said increase of the velocity. As a result, the pressure of the liquid metal in the constriction can be maintained at a uniform relatively low level throughout the constriction, so that a uniform and relatively low mechanical load is exerted on the window during operation. In this way, the deformation of the window and the risk of breakage of the window are considerably limited.
    • 本发明涉及一种用于产生X射线的装置(31)。 该装置具有用于发射容纳在真空空间(3)中的电子(27)的源(5)。 由于电子的入射,X射线被液态金属发射。 液体金属流过收缩部(13),其中由源发射的电子撞击液态金属。 收缩线由薄的窗口(23)限定,薄的窗口(23)由对电子和X射线透明的材料制成,并且将收缩部中的液态金属与真空空间分开。 根据本发明,收缩部(13)具有从主流动方向(X)看到的横截面积,以这样的方式增加,即在所述方向的操作期间,发生流速的降低,使得 由粘性流动损失引起的在所述方向上的收缩部分中的液态金属的压力的降低基本上对应于由所述速度的增加引起的伯努利效应引起的所述方向上的所述压力的增加。 结果,收缩部中的液态金属的压力可以在整个收缩部中保持在均匀的相对较低的水平,使得在操作期间在窗口上施加均匀且相对较低的机械载荷。 以这种方式,窗口的变形和窗口破裂的风险受到相当的限制。
    • 16. 发明申请
    • A DEVICE FOR GENERATING X-RAYS HAVING A LIQUID METAL ANODE
    • 用于产生具有液体金属阳极的X射线的装置
    • WO2003077277A1
    • 2003-09-18
    • PCT/IB2003/000798
    • 2003-02-26
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHHARDING, GeoffreyDAVID, BerndTHRAN, AxelSCHLOMKA, Jens, P.
    • HARDING, GeoffreyDAVID, BerndTHRAN, AxelSCHLOMKA, Jens, P.
    • H01J35/08
    • H01J35/08H01J2235/082H01J2235/1262
    • The invention relates to a device for generating X-rays (31). The device has a source (5) for emitting electrons (27) accommodated in a vacuum space (3). The X-rays are emitted by a liquid metal as a result of the incidence ofthe electrons. The liquid metal flows through a constriction (13) where the electrons emitted by the source impinge upon the liquid metal. The constriction is bounded by a thin window (23), which is made from a material which is transparent to electrons and X-rays and which separates the liquid metal in the constriction from the vacuum space, and by a wall (25) opposite to the window. According to the invention, the wall (25) has a profile (p) which matches a profile (p') which the window (23) has,during operation, as a result of a deformation of the window caused by a pressure of the liquid metal in the constriction (13). Thus, it is achieved that the constriction has a predetermined intended cross-sectional area, and a decrease of the flow velocity and an accompanying excessive increase of the pressure at the location of the deformation of the window are prevented.
    • 本发明涉及一种用于产生X射线的装置(31)。 该装置具有用于发射容纳在真空空间(3)中的电子(27)的源(5)。 由于电子的入射,X射线被液态金属发射。 液体金属流过收缩部(13),其中由源发射的电子撞击液态金属。 狭缝由薄的窗口(23)限定,薄的窗口(23)由对电子和X射线透明的材料制成,并且将收缩部中的液体金属与真空空间分开,并且通过与 窗户。 根据本发明,壁(25)具有与窗口(23)具有的轮廓(p')匹配的轮廓(p),在操作期间,由于窗口(23)的压力导致的窗口的变形 收缩部(13)中的液态金属。 因此,实现了收缩具有预定的预期横截面积,并且防止了流动速度的降低和伴随着窗口变形位置处压力的过度增加。
    • 19. 发明申请
    • RF-SAFE INTERVENTIONAL OR NON-INTERVENTIONAL INSTRUMENT FOR USE IN AN MRI APPARATUS
    • RF安全性传统或非传统仪器用于MRI设备
    • WO2013076677A1
    • 2013-05-30
    • PCT/IB2012/056621
    • 2012-11-22
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH
    • WEISS, SteffenLIPS, OliverDAVID, Bernd
    • G01R33/28
    • G01R33/288
    • An RF-safe interventional or a non-interventional instrument is disclosed for use during an MR imaging or MR examination of an examination object (A), which instrument is made of or comprises at least one longitudinal or elongated electrically conductive element (1, 3), especially in the form of a conductor or wire or line for feeding electrical signals, or in the form of the instrument itself or a component or a part thereof, which is not provided for feeding electrical signals but nevertheless electrically conductive, wherein all such elements are subject to RF common mode currents which are induced in the element when the instrument or element is exposed to an RF/MR excitation field generated during MR imaging or MR examination by means of an MR imaging apparatus. The instrument is made RF-safe by increasing the energy loss of an oscillator which is represented by the conductor (1, 3) by means of a damping element (4; 6) in order to prevent or limit RF heating of the examination object (A) at or surrounding the conductor (1, 3).
    • 公开了用于在检查对象(A)的MR成像或MR检查期间使用的RF安全介入或非介入性仪器,该仪器由或包括至少一个纵向或细长的导电元件(1,3) ),特别是用于馈送电信号的导线或线或线的形式,或以仪器本身或其部件或部分的形式,其不被提供用于馈送电信号但仍然导电,其中所有这些 当仪器或元件暴露于通过MR成像设备的MR成像或MR检查期间产生的RF / MR激励场时,元件受到在元件中感应的RF共模电流。 通过借助于阻尼元件(4; 6)增加由导体(1,3)表示的振荡器的能量损失,以便防止或限制检查对象的RF加热,使该仪器RF安全 A)在导体(1,3)处或周围。
    • 20. 发明申请
    • A DEVICE FOR GENERATING X-RAYS
    • 用于产生X射线的装置
    • WO2002065505A1
    • 2002-08-22
    • PCT/IB2002/000335
    • 2002-01-30
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS CORPORATE INTELLECTUAL PROPERTY GMBHHARDING, GeoffreyDAVID, BerndSCHLOMKA, Jens, P.TIELEMANS, Leonardus, P., M.POTZE, Willem
    • HARDING, GeoffreyDAVID, BerndSCHLOMKA, Jens, P.TIELEMANS, Leonardus, P., M.POTZE, Willem
    • H01J35/08
    • H01J35/08H01J2235/082
    • The invention relates to a device (1) for generating X-rays (57). The device comprises a source (7) for emitting electrons (53) and a liquid metal for emitting X-rays as a result of the incidence of electrons. The device further comprises a displacing member (11) for displacing the liquid metal through an impingement position (55) where the electrons emitted by the source impinge upon the liquid metal. As a result of the flow of liquid metal through the impingement position the heat, which is generated in the impingement position as a result of the incidence of the electrons upon the liquid metal, is transported away from the impingement position. According to the invention, the displacing member (11) has a contact surface (61), which is in contact with the liquid metal in the impingement position (55), and a driving member (31) for moving the contact surface in a direction which, in the impingement position, is substantially parallel to the contact surface. Thus the flow of liquid metal in the impingement position is achieved as a result of viscous shear forces in the liquid metal caused by friction forces between the liquid metal and the moving contact surface. As a result, the necessary pressure of the liquid metal is limited.
    • 本发明涉及一种用于产生X射线(57)的装置(1)。 该装置包括用于发射电子的源(7)和由于电子的入射而发射X射线的液态金属。 所述装置还包括用于使所述液态金属移动通过所述冲击位置(55)移动的位移构件(11),其中由所述源发射的电子撞击到所述液态金属上。 作为液体金属流过冲击位置的结果,由于电子在液态金属上的入射而​​在冲击位置产生的热量被运送离开冲击位置。 根据本发明,移动构件(11)具有与冲击位置(55)中的液体金属接触的接触表面(61)和用于使接触表面沿方向移动的驱动构件(31) 其在冲击位置处基本上平行于接触表面。 因此,液态金属在冲击位置的流动是由于液态金属与可动接触面之间的摩擦力引起的液态金属中的粘性剪切力而实现的。 结果,液态金属的必要压力受到限制。