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1. 发明授权

US5212437A High speed starter operations monitor 失效
标题翻译：高速起动器运行监视器
公开(公告)号：US5212437A
公开(公告)日：1993-05-18
申请号：US739837
申请日：1991-08-02
申请人： Donald A. Hescht , Walter A. Dupuis , William E. Szabo , Theodore A. Resnick
发明人： Donald A. Hescht , Walter A. Dupuis , William E. Szabo , Theodore A. Resnick
IPC分类号： A61B6/03 , H05G1/66
CPC分类号： A61B6/032 , H05G1/66 , A61B6/4021
摘要： An x-ray tube (10) of a CT scanner has a rotating anode and rotor combination which is propelled by AC currents applied to run and phase windings (42, 46) by a starter (22). A monitor (24) includes Hall effect current detectors (40, 44) which detect the actual current flowing through the run and phase windings. The detected analog current values, voltage values, and the like are multiplexed (132) and digitized in a preselected order by an analog to digital converter (60) and stored in that order in a FIFO memory (62). A microprocessor (64) performs a Fourier transform (94, 96) to convert the digital run and phase signals into frequency spectra. The run and phase frequency spectra are compared (100, 102, 104, 106) with frequency spectra indicative of rotor speed, bearing wear, anode vibration, failure of the anode to rotate, and other conditions, analyzed for symmetry or other characteristics, or the like (FIG. 5 ) to generate digital run and phase reference signals. An error amplifier (54) controls a pulse width modulator ( 56) or other power amplifier controls in accordance with a deviation between analog reference signals converted from the digital signals by a reference digital to analog converter (66) and the actually sensed run and phase signals (40, 44) to adjust the starter. A direct coupled driver (122) adjusts DC offsets in the drive currents to maintain balance and drive efficiency.
摘要翻译： CT扫描器的X射线管（10）具有旋转阳极和转子组合，其由通过起动器（22）施加到运行和相绕组（42,46）的AC电流推动。监视器（24）包括霍尔效应电流检测器（40,44），其检测流过运行和相绕组的实际电流。检测到的模拟电流值，电压值等被模数转换器（60）以预选的顺序复用（132）并数字化，并以该顺序存储在FIFO存储器（62）中。微处理器（64）执行傅里叶变换（94,96）以将数字运行和相位信号转换成频谱。将运行和相位频谱与100Hz，102,104,106）进行比较，其频谱表示转子速度，轴承磨损，阳极振动，阳极转动故障以及其他条件，分析对称性或其他特性，或（图5）以产生数字运行和相位参考信号。误差放大器（54）根据由参考数模转换器（66）从数字信号转换的模拟参考信号之间的偏差和实际检测到的运行和相位来控制脉冲宽度调制器（56）或其它功率放大器控制信号（40,44）来调节起动器。直接耦合驱动器（122）调节驱动电流中的直流偏移以保持平衡和驱动效率。

2. 发明授权

US4853946A Diagonostic service system for CT scanners 失效
标题翻译： CT扫描仪的对角线服务系统
公开(公告)号：US4853946A
公开(公告)日：1989-08-01
申请号：US201405
申请日：1988-06-02
申请人： Richard J. Elliott , Walter A. Dupuis , Theodore A. Resnick
发明人： Richard J. Elliott , Walter A. Dupuis , Theodore A. Resnick
IPC分类号： A61B6/03 , A61B6/10 , G05B19/042 , H05G1/26 , H05G1/54
CPC分类号： A61B6/035 , A61B6/10 , A61B6/4488 , G05B19/0428 , H05G1/26 , H05G1/54 , G05B2219/24018 , G05B2219/24055 , G05B2219/24058 , G05B2219/2652
摘要： A plurality of medical electronic apparatae (A) including a CT scanner (B) or other medical imaging equipment are disposed at each of a plurality of remote locations. A diagnostic service system (C) monitors each CT scanner to create a malfunction history therefor. A central polling station (D) polls the diagnostic service system of each scanner to retrieve the diagnostic history thereof. The diagnostic service system includes a plurality of monitors (80, 82, 84, 86, 88) which monitor operating conditions and parameters of the scanner. The monitored operating conditions include the operating mode within the sequence of operating modes, operating parameters of an X-ray tube (12), and the operation of other scanner components. When a fault detection circuit (92) detects a malfunction, a latch array (90) immediately stores an indication of the condition monitored by the monitors. A read/write circuit (94) transfers the latched condition data to a malfunction history memory (96). Data from the malfunction history memory may be displayed on diagnostic service display (104) or transmitted by a modem (112) to the central polling station.
摘要翻译：包括CT扫描仪（B）或其他医学成像设备的多个医疗电子设备（A）设置在多个远程位置的每一个处。诊断服务系统（C）监视每个CT扫描仪以产生故障历史。中央投票站（D）轮询每个扫描仪的诊断服务系统以检索其诊断历史。诊断服务系统包括监视扫描器的操作条件和参数的多个监视器（80,82,84,86,88）。所监视的操作条件包括操作模式的顺序，X射线管（12）的操作参数以及其它扫描器组件的操作的操作模式。当故障检测电路（92）检测到故障时，锁存器阵列（90）立即存储由监视器监视的状况的指示。读/写电路（94）将锁存条件数据传送到故障历史存储器（96）。来自故障历史存储器的数据可以被显示在诊断服务显示器（104）上，或者由调制解调器（112）发送到中央投票站。

3. 发明授权

US4829551A Biphase quadrature drive for an x-ray tube rotor 失效
标题翻译：用于X射线管转子的双相正交驱动
公开(公告)号：US4829551A
公开(公告)日：1989-05-09
申请号：US143514
申请日：1988-01-13
申请人： Theodore A. Resnick , Walter A. Dupuis , William E. Szabo
发明人： Theodore A. Resnick , Walter A. Dupuis , William E. Szabo
IPC分类号： H05G1/66
CPC分类号： H05G1/66
摘要： An x-ray tube (10) imaging system, such as a computed tomography scanner, includes a cathode (40) for generating a stream of electrons. A rotating anode (42) is placed in a path of the electron stream and generates x-rays as a result of collisions therewith. An induction rotor (44) causes rotation of the anode as a result of electromagnetic interaction with a stator (48) comprised of two windings: a run winding (50) and a phase winding (52). The run winding and the phase winding are connected to three nodes (54, 58, 60), one of which is common to both. The three nodes are actively driven with run, common, and phase signals, respectively. Actively driving the three nodes increases bus drive voltage over 40% over that achieved by half-bridge drives.
摘要翻译：诸如计算机断层摄影扫描仪的X射线管（10）成像系统包括用于产生电子流的阴极（40）。旋转阳极（42）被放置在电子流的路径中，并且由于与其碰撞而产生X射线。感应转子（44）由于与由两个绕组组成的定子（48）的电磁相互作用导致阳极的旋转：一个绕组（50）和一个相绕组（52）。运行绕组和相绕组连接到三个节点（54,58,60），其中一个是两者共同的。三个节点分别由运行，公共和相位信号主动驱动。积极驱动三个节点的总线驱动电压比半桥驱动器提高40％以上。

4. 发明授权

US4775992A Closed loop x-ray tube current control 失效
标题翻译：闭环X射线管电流控制
公开(公告)号：US4775992A
公开(公告)日：1988-10-04
申请号：US909505
申请日：1986-09-19
申请人： Theodore A. Resnick , Walter A. Dupuis
发明人： Theodore A. Resnick , Walter A. Dupuis
IPC分类号： H05G1/34
CPC分类号： H05G1/34
摘要： Between scans, a stand-by control (40) causes a filament current power supply (44) to supply a low level of power to a tube filament (46). When x-rays are to be generated, a non-linear digital to analog converter (50) supplies a filament current control signal which is estimated to provide a selected tube current. A space charge compensation circuit adds an offset to the selected filament signal to compensate for the selected voltage at which the tube is to be operated. A current boost circuit (70) adds an incremental current boost (26) of a magnitude in accordance with a function of the difference between the actual filament temperature and the normal operating temperature in order to bring the filament up to operating temperature more quickly. A feedback loop (90 to 98) adjusts the selected filament current signal in accordance with any difference between the selected tube current and the actual tube current. A damping circuit (110) reduces the rate of change of the error signal such that the filament current changes at a rate commensurate with the heating rate of the filament.
摘要翻译：在扫描之间，备用控制器（40）使灯丝电流电源（44）向管灯丝（46）供应低水平的电力。当要产生X射线时，非线性数模转换器（50）提供被估计为提供所选择的管电流的灯丝电流控制信号。空间电荷补偿电路将所选择的灯丝信号增加一个偏移量，以便补偿管被操作的选定电压。电流升压电路（70）根据实际灯丝温度和正常工作温度之间的差异的函数相加大小的增量电流升压（26），以使灯丝更快地进入工作温度。反馈回路（90至98）根据所选管电流和实际管电流之间的任何差异来调节所选择的灯丝电流信号。阻尼电路（110）降低误差信号的变化率，使得灯丝电流以与灯丝的加热速率相当的速率变化。

5. 发明授权

US4453263A Constant potential H-V generator 失效
标题翻译：恒电位H-V发生器
公开(公告)号：US4453263A
公开(公告)日：1984-06-05
申请号：US335591
申请日：1981-12-30
申请人： Theodore A. Resnick , Walter A. Dupuis , Anthony Palermo, Jr.
发明人： Theodore A. Resnick , Walter A. Dupuis , Anthony Palermo, Jr.
IPC分类号： A61B6/00 , G21K5/10 , H05G1/32
CPC分类号： A61B6/56 , G21K5/10 , H05G1/32
摘要： An x-ray tube voltage generator with automatic stabilization circuitry is disclosed. The generator includes a source of pulsating direct current voltage such as from a rectified 3 phase transformer. This pulsating voltage is supplied to the cathode and anode of an x-ray tube and forms an accelerating potential for electrons within that tube. The accelerating potential is stabilized with a feedback signal which is provided by a feedback network. The network includes an error signal generator which compares an instantaneous accelerating potential with a preferred reference accelerating potential and generates an error function. This error function is transmitted to a control tube grid which in turn causes the voltage difference between x-ray tube cathode and anode to stabilize and thereby reduce the error function. In this way stabilized accelerating potentials are realized and uniform x-ray energy distributions produced.
摘要翻译：公开了具有自动稳定电路的X射线管电压发生器。发电机包括诸如来自整流三相变压器的脉动直流电压源。该脉动电压被提供给x射线管的阴极和阳极，并且在该管内形成电子的加速电位。加速电位由反馈网络提供的反馈信号稳定。网络包括误差信号发生器，其将瞬时加速电位与优选参考加速电位进行比较并产生误差函数。该误差函数被传送到控制管栅格，这又导致x射线管阴极和阳极之间的电压差稳定，从而降低误差函数。以这种方式实现稳定的加速电位并产生均匀的x射线能量分布。

6. 发明授权

US4311913A X-Ray tube current control 失效
标题翻译： X射线管电流控制
公开(公告)号：US4311913A
公开(公告)日：1982-01-19
申请号：US81674
申请日：1979-10-04
申请人： Theodore A. Resnick , Walter A. Dupuis
发明人： Theodore A. Resnick , Walter A. Dupuis
IPC分类号： A61B6/03 , H05G1/34 , H05G1/30
CPC分类号： H05G1/34
摘要： A closed loop feedback system for controlling the current output of an x-ray tube. The system has circuitry for improving the transient response and stability of the x-ray tube current over a substantial nonlinear portion of the tube current production characteristic.The system includes a reference generator for applying adjustable step function reference signals representing desired tube currents. The system also includes means for instantaneous sensing of actual tube current. An error detector compares the value of actual and reference tube current and produces an error signal as a function of their difference. The system feedback loop includes amplification circuitry for controlling x-ray tube filament DC voltage to regulate tube current as a function of the error signal value.The system also includes compensation circuitry, between the reference generator and the amplification circuitry, to vary the loop gain of the feedback control system as a function of the reference magnitude.
摘要翻译：用于控制X射线管的电流输出的闭环反馈系统。该系统具有用于在管电流产生特性的基本非线性部分上改善X射线管电流的瞬态响应和稳定性的电路。该系统包括用于应用表示所需管电流的可调节步进功能参考信号的参考发生器。该系统还包括用于瞬时感测实际管电流的装置。误差检测器比较实际和参考管电流的值，并产生作为其差值的函数的误差信号。系统反馈回路包括用于控制x射线管灯丝直流电压的放大电路，以便根据误差信号值调节管电流。该系统还包括参考发生器和放大电路之间的补偿电路，以作为参考幅度的函数来改变反馈控制系统的环路增益。

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