-
公开(公告)号：US4707607A
公开(公告)日：1987-11-17
申请号：US839480
申请日：1986-03-14
Applicant: Nathan R. Whetten
Inventor： Nathan R. Whetten
CPC classification number: H01J47/02
Abstract: A high resolution x-ray detector for medical computerized tomography systems is filled with a high pressure noble gas as a detecting medium. The detector comprises a housing having an x-ray permeable window and containing at least one electrically conductive voltage plate and at least one collector plate comprising a plurality of conductive elements. The gaseous detecting medium, such as xenon, occupies the space between the voltage and collector plates.
Abstract translation: 用于医用计算机断层摄影系统的高分辨率x射线检测器填充有高压稀有气体作为检测介质。 检测器包括具有x射线透过窗口并且包含至少一个导电电压板的壳体和包括多个导电元件的至少一个收集板。 气体检测介质，例如氙，占据电压和集电板之间的空间。
-
公开(公告)号：US4705948A
公开(公告)日：1987-11-10
申请号：US831942
申请日：1986-02-24
Applicant: Roswitha S. Ramsey , Richard A. Todd
Inventor： Roswitha S. Ramsey , Richard A. Todd
Abstract: A helium ionization detector for gas chromatography is operated in a constant current, pulse-modulated mode by configuring the detector, electrometer and a high voltage pulser in a closed-loop control system. The detector current is maintained at a fixed level by varying the frequency of fixed-width, high-voltage bias pulses applied to the detector. An output signal proportional to the pulse frequency is produced which is indicative of the charge collected for a detected species.
Abstract translation: 用于气相色谱的氦离子化检测器通过在闭环控制系统中配置检测器，静电计和高压脉冲发生器，以恒定电流，脉冲调制方式工作。 通过改变施加到检测器的固定宽度的高电压偏置脉冲的频率，将检测器电流维持在固定电平。 产生与脉冲频率成比例的输出信号，其表示针对检测到的物种收集的电荷。
-
公开(公告)号：US4697083A
公开(公告)日：1987-09-29
申请号：US824037
申请日：1986-01-30
Applicant: Andrew M. Tullis
Inventor： Andrew M. Tullis
IPC: H01J47/02
CPC classification number: H01J47/02
Abstract: An improved ion detector device of the ionization detection device chamberype comprises an ionization chamber having a central electrode therein surrounded by a cylindrical electrode member within the chamber with a collar frictionally fitted around at least one of the electrodes. The collar has electrical contact means carried in an annular groove in an inner bore of the collar to contact the outer surface of the electrode to provide electrical contact between an external terminal and the electrode without the need to solder leads to the electrode.
Abstract translation: 离子化检测装置室型改进的离子检测装置包括一个电离室，其中心电极由腔室内的一个圆柱形电极构件围绕，一个环绕至少一个电极摩擦配合。 轴环具有承载在轴环的内孔中的环形槽中的电接触装置，以接触电极的外表面，以在外部端子和电极之间提供电接触，而不需要将引线焊接到电极。
-
公开(公告)号：US4678918A
公开(公告)日：1987-07-07
申请号：US776329
申请日：1985-09-16
Applicant: Joannes L. G. Hermens
Inventor： Joannes L. G. Hermens
CPC classification number: H01J47/02
Abstract: An integrated radiation detector comprises a number of electrode plates assembled at a mutual distance. The electrode plates comprise slots in which electrically insulating gas-tight strips projecting through all the electrode plates are provided, of which strips one serves as an input window and the remaining strips serve as walls of the detection spaces. For sealing, the strips are interconnected, for example, by means of electrically insulated glued joints. Since the detector need no longer be assembled in a gas-tight housing, connections for the electrodes can be realized in a simple manner. Parts of the electrodes projecting beyond the actual detection space on the side of the input window may serve a collimator for the incident radiation.
Abstract translation: 集成辐射检测器包括以相互距离组装的多个电极板。 电极板包括槽，其中提供了通过所有电极板突出的电绝缘气密条，其中条带用作输入窗口，其余条带用作检测空间的壁。 为了密封，条带例如通过电绝缘胶合接头相互连接。 由于不需要将检测器组装在气密的壳体中，所以可以以简单的方式实现电极连接。 在输入窗口侧突出超过实际检测空间的电极的部分可以用于入射辐射的准直器。
-
125.发明授权
公开(公告)号：US4549108A
公开(公告)日：1985-10-22
申请号：US497464
申请日：1983-05-23
Applicant: Joannes L. G. Hermens
Inventor： Joannes L. G. Hermens
Abstract: In devices having several electrical connections passing through a separation wall, feedthrough is realized by means of a flexible printed tape. The printed tape includes a number of electrical conductors, and is enveloped by a polyimide carrier which constitutes with an epoxy glue a very reliable permanent seal in separation walls of both metal and ceramic materials.
Abstract translation: 在具有通过分隔壁的多个电连接的装置中，馈通通过柔性印刷带实现。 印刷的胶带包括多个电导体，并且被聚酰亚胺载体包围，该聚酰亚胺载体用环氧树脂粘合剂在金属和陶瓷材料的分隔壁中具有非常可靠的永久性密封。
-
Patent Agency Ranking
公开(公告)号：US4538066A
公开(公告)日：1985-08-27
申请号：US582643
申请日：1984-02-22
Applicant: Glenn C. Carle , Daniel R. Kojiro , Donald E. Humphry
Inventor： Glenn C. Carle , Daniel R. Kojiro , Donald E. Humphry
Abstract: Metastable ionization detectors used for chromatographic analysis usually employ a fixed high voltage for the ionization potential. For this reason, the operating range is limited to about three orders of magnitude. By use of the technique disclosed in the instant invention, operating ranges of about nine orders of magnitude are obtained.The output current from a metastable ionization detector (MID) is applied to a modulation voltage circuit. An adjustment is made to balance out the background current, and an output current, above background, is applied to an input of a strip chart recorder. For low level concentrations, i.e., low detected output current, the ionization potential will be at a maximum and the metastable ionization detector will operate at its most sensitive level. When the detected current from the metastable ionization detector increases above a predetermined threshold level, a voltage control circuit is activated which turns on a high voltage transistor which acts to reduce the ionization potential. The ionization potential applied to the metastable ionization detector is then varied so as to maintain the detected signal level constant. The variation in ionization potential is now related to the concentration of the constituent and a representative amplitude is applied to another input of said strip chart recorder.
Abstract translation: 用于色谱分析的亚稳电离检测器通常采用固定的高电压进行电离电位。 因此，操作范围限制在三个数量级左右。 通过使用本发明公开的技术，获得约9个数量级的操作范围。 来自亚稳电离检测器（MID）的输出电流被施加到调制电压电路。 进行调整以平衡背景电流，并且将背景上的输出电流应用于条形图记录器的输入。 对于低电平浓度，即低检测输出电流，电离电位将处于最大值，并且亚稳电离检测器将以其最敏感的水平运行。 当来自亚稳电离检测器的检测电流增加到高于预定阈值电平时，激活电压控制电路，其接通用于降低电离电位的高电压晶体管。 然后施加到亚稳电离检测器的电离电位被改变，以便保持检测到的信号电平恒定。 电离电位的变化现在与组分的浓度有关，代表性的振幅被施加到所述带状图记录仪的另一个输入端。
-
公开(公告)号：US4485307A
公开(公告)日：1984-11-27
申请号：US343077
申请日：1982-01-27
Applicant: Louis S. Osborne , Richard C. Lanza
Inventor： Louis S. Osborne , Richard C. Lanza
CPC classification number: G01T1/2935 , H01J47/02
Abstract: A method and apparatus for determining the distribution of a position-emitting radioisotope into an object, the apparatus consisting of a wire mesh radiation converter, an ionizable gas for propagating ionization events caused by electrodes released by the converter, a drift field, a spatial position detector and signal processing circuitry for correlating near-simultaneous ionization events and determining their time differences, whereby the position sources of back-to-back collinear radiation can be located and a distribution image constructed.
Abstract translation: 一种用于确定位置发射放射性同位素分布到物体中的分布的方法和装置，该装置由丝网辐射转换器，用于传播由转换器释放的电极引起的电离事件的可电离气体，漂移场，空间位置 检测器和信号处理电路，用于使近同时电离事件相关并确定其时间差，从而可以定位背对背共线辐射的位置源并构建分布图像。
-
公开(公告)号：US4345156A
公开(公告)日：1982-08-17
申请号：US194817
申请日：1980-10-07
Applicant: Isao Ishikawa , Hiroshi Kanda , Shinji Yamamoto
Inventor： Isao Ishikawa , Hiroshi Kanda , Shinji Yamamoto
CPC classification number: H01J47/02
Abstract: In an ionization chamber type X-ray detector used in a computerized X-ray tomography device, non-insulative material such as semiconductive or conductive material is provided on each of paired electrode supporting plates for supporting anode and cathode electrodes, whereby the electrification of the electrode supporting plate may be prevented so that a signal current can be exactly and stably detected.
Abstract translation: 在计算机化X射线断层摄影装置中使用的电离室型X射线检测器中，在用于支撑阳极和阴极电极的成对电极支撑板的每一个上设置诸如半导体或导电材料的非绝缘材料，由此， 可以防止电极支撑板，从而可以准确且稳定地检测信号电流。
-
129.发明授权
公开(公告)号：US4276476A
公开(公告)日：1981-06-30
申请号：US971200
申请日：1978-12-20
Applicant: Dennis J. Cotic
Inventor： Dennis J. Cotic
CPC classification number: H01J47/02
Abstract: A multicell x-ray radiation detector includes a chamber for confining a gas that produces electron-ion pairs incidental to absorbing radiation. The chamber is formed by a channel having a bottom and sidewalls, one of the side walls having a window for admitting radiation to the chamber. A multicell unitary electrode assembly is mounted within the chamber. An upper compressed elastic member is interposed between the electrode assembly and the chamber and, similarly, a rear compressed elastic member is interposed between the assembly and the sidewall opposite the window of the chamber. The compressed elastic members interposed between the electrode assembly and the chamber isolate the electrode assembly from any mechanical vibration and thermal distortion of the chamber while maintaining a precise position of the electrode assembly to the chamber window.
Abstract translation: 多单元x射线辐射检测器包括用于限制产生与吸收辐射相邻的电子 - 离子对的气体的腔室。 腔室由具有底部和侧壁的通道形成，其中一个侧壁具有用于将辐射导入腔室的窗口。 多腔单元电极组件安装在腔室内。 上部压缩弹性构件插入在电极组件和室之间，并且类似地，后部压缩弹性构件插入在组件和与腔室的窗口相对的侧壁之间。 介于电极组件和腔室之间的压缩的弹性构件将电极组件与室的任何机械振动和热变形隔离，同时保持电极组件到腔室窗口的精确位置。
-
公开(公告)号：US4264816A
公开(公告)日：1981-04-28
申请号：US98451
申请日：1979-11-29
Applicant: Albert H. Walenta
Inventor： Albert H. Walenta
CPC classification number: H01J47/02
Abstract: An ionization chamber has separate drift and detection regions electrically isolated from each other by a fine wire grid. A relatively weak electric field can be maintained in the drift region when the grid and another electrode in the chamber are connected to a high voltage source. A much stronger electric field can be provided in the detection region by connecting wire electrodes therein to another high voltage source. The detection region can thus be operated in a proportional mode when a suitable gas is contained in the chamber. High resolution output pulse waveforms are provided across a resistor connected to the detection region anode, after ionizing radiation enters the drift region and ionize the gas.
Abstract translation: 电离室具有通过细网格彼此电隔离的分离的漂移和检测区域。 当栅格和室中的另一个电极连接到高压源时，漂移区域中可以保持相对较弱的电场。 通过将线电极连接到另一个高电压源，可以在检测区域中提供更强的电场。 因此，当室内容纳合适的气体时，检测区域能够以比例模式操作。 在电离辐射进入漂移区域并使气体离子化之后，在连接到检测区域阳极的电阻器两端提供高分辨率输出脉冲波形。
-
-
-
-
-
-
-
-
-
Search Results
434
records
(took 0.016 seconds)
