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1. 发明授权

US06233947B1 High efficiency fuzzy logic based stirling cycle cryogenic cooler 失效
标题翻译：基于高效模糊逻辑的斯特林循环低温冷却器
公开(公告)号：US06233947B1
公开(公告)日：2001-05-22
申请号：US09432999
申请日：1999-11-02
申请人： Asad M. Madni , Jim B. Vuong , Lawrence A. Wan
发明人： Asad M. Madni , Jim B. Vuong , Lawrence A. Wan
IPC分类号： F25B900
CPC分类号： F25B9/14 , F25B2309/001
摘要： A high efficiency fuzzy logic based Stirling cycle cryogenic cooler has increased efficiency by driving the system in the demand mode (near the desired set point cooling temperature) by a more efficient sinusoidal waveform. The compressor pistons of the Stirling compressor are driven by a voice coil actuator between compressing the coolant gas and then releasing and being driven against an opposing return spring. Since a square wave provides faster cool-down, this is utilized during that mode. In addition, to utilize the rebound effect of both the ambient gas pressure and the return springs, the voice coil actuator drive is turned off during one-quarter cycle rebound portions of the cooling cycle.
摘要翻译：基于高效模糊逻辑的斯特林循环低温冷却器通过更有效的正弦波形在需求模式（靠近所需设定点冷却温度）下驱动系统而提高了效率。斯特林压缩机的压缩机活塞由音圈致动器驱动，压缩冷却剂气体，然后释放并被驱动抵靠相对的复位弹簧。由于方波提供更快的降温，因此在此模式下使用。此外，为了利用环境气体压力和复位弹簧的回弹效应，在冷却循环的四分之一周期的回弹部分期间，音圈致动器驱动器被关闭。

2. 发明授权

US06520031B2 Non contacting torque sensor 有权
公开(公告)号：US06520031B2
公开(公告)日：2003-02-18
申请号：US09935374
申请日：2001-08-22
申请人： Asad M. Madni , Jim B. Vuong , Robert K. Hansen
发明人： Asad M. Madni , Jim B. Vuong , Robert K. Hansen
IPC分类号： G01L312
CPC分类号： G01L3/109 , G01D5/2053 , G01L3/105
摘要： A non contacting angular differential displacement torque sensor utilizes a split shaft with a connecting torsion bar with a pair of receive disks each with an intervening coupler disk carrying a conductive attenuating pattern where the inductive coupling between transmit and receive disks is individually attenuated in accordance with the angular position of the shaft on which the disks are mounted. The pair of receive disks which receive signals from a common transmitter have their angular difference taken and this is the actual torque on the shaft.

3. 发明授权

US07501834B2 Voice coil actuator with embedded capacitive sensor for motion, position and/or acceleration detection 有权
标题翻译：具有嵌入式电容传感器的音圈执行器，用于运动，位置和/或加速度检测
公开(公告)号：US07501834B2
公开(公告)日：2009-03-10
申请号：US11159572
申请日：2005-06-21
申请人： Asad M. Madni , Jim B. Vuong , Robert K. Hansen
发明人： Asad M. Madni , Jim B. Vuong , Robert K. Hansen
IPC分类号： G01R27/26 , H04R9/06
CPC分类号： H02K11/21 , H02K41/0356 , H02P25/034
摘要： A voice coil actuator having a capacitive sensor. A magnetic housing contains at least one magnet, and has a wall that defines a first cavity. A magnetic core is coupled to the magnetic housing and extend from an interior surface of the magnetic housing in a direction of a center axis of the wall of the magnetic housing. A coil assembly has a wall defining a second cavity that at least partly envelops the magnetic core, disposed at least partly inside the first cavity, and adapted to move linearly with respect to the magnetic housing. The coil assembly forms a capacitive sensor with the magnetic core, the capacitive sensor adapted to measure at least one of position, velocity and acceleration of the coil assembly with respect to the magnetic housing.
摘要翻译：具有电容式传感器的音圈致动器。磁性壳体包含至少一个磁体，并且具有限定第一腔的壁。磁芯被耦合到磁性壳体并且从磁性壳体的内表面沿着磁性壳体的壁的中心轴线的方向延伸。线圈组件具有限定第二腔的壁，所述第二腔至少部分地包围磁芯，至少部分地设置在第一腔内，并且适于相对于磁性壳体线性地移动。线圈组件形成具有磁芯的电容传感器，电容式传感器适于测量线圈组件相对于磁性壳体的位置，速度和加速度中的至少一个。

4. 发明授权

US06985018B2 Programmable, multi-turn, pulse width modulation circuit for a non-contact angular position sensor 有权
标题翻译：用于非接触角度位置传感器的可编程，多圈，脉宽调制电路
公开(公告)号：US06985018B2
公开(公告)日：2006-01-10
申请号：US10813329
申请日：2004-03-29
申请人： Asad M. Madni , Jim B. Vuong , Philip Vuong
发明人： Asad M. Madni , Jim B. Vuong , Philip Vuong
IPC分类号： H03K3/017
CPC分类号： G01D5/2053
摘要： A multi-turn pulse width modulation (PWM) generator for generating a PWM output corresponding to multiple 360 degree turns. A counter receives a reference signal, and counts a number of cycles of the reference signal to generate a binary output corresponding to the number of cycles counted. A frequency divider receives a sensor output signal, and divides the frequency of the sensor output signal by the number of turns in the multiple turns to generate a frequency divided signal. The sensor output signal has substantially the same frequency as the reference signal, but can be offset in phase from the reference signal. A demultiplexer receives the binary output, and generates a plurality of turn indicator signals, each corresponding to one of the multiple turns. A multiplexer receives the turn indicator signals and a mechanical turn indication signal, and selects one of the turn indicator signals that corresponds to the mechanical turn indication signal. At least one flip flop receives the selected one of the turn indicator signals and the frequency divided signal, and generates the PWM output using the selected one of the turn indicator signals and the frequency divided signal. The multi-turn PWM generator may be combined with a single-turn angular position sensor to form a multi-turn angular position sensor.
摘要翻译：一种用于产生对应于多个360度匝数的PWM输出的多匝脉宽调制（PWM）发生器。计数器接收参考信号，并对参考信号的周期数进行计数，以生成与计数的周期数相对应的二进制输出。分频器接收传感器输出信号，并将传感器输出信号的频率除以匝数匝数以产生分频信号。传感器输出信号具有与参考信号基本相同的频率，但可以与参考信号相位偏移。解复用器接收二进制输出，并且产生多个转向指示符信号，每个转向指示符信号对应于多个匝数之一。复用器接收转向指示符信号和机械转向指示信号，并且选择对应于机械转向指示信号的转向指示符信号之一。至少一个触发器接收转向指示符信号和分频信号中选择的一个触发器，并且使用转向指示器信号和分频信号中选择的一个产生PWM输出。多匝PWM发生器可以与单匝角位置传感器组合以形成多匝角位置传感器。

5. 发明授权

US06448759B2 Non-contact linear position sensor for motion control applications with inductive attenuating coupler 有权
标题翻译：用于具有电感衰减耦合器的运动控制应用的非接触线性位置传感器
公开(公告)号：US06448759B2
公开(公告)日：2002-09-10
申请号：US09764840
申请日：2001-01-17
申请人： Asad M. Madni , Jim B. Vuong
发明人： Asad M. Madni , Jim B. Vuong
IPC分类号： G01B714
CPC分类号： G01D5/2053
摘要： A non-contact linear position center has juxtaposed transmit and receive sections with a coupler or slider section interposed therebetween carrying a symmetrical attenuating conductive pattern. The inductive coupling of coils on the transmitter and receive sections is attenuated in accordance with the linear position of the pattern on the coupler. A unique sinusoidal signal is generated whose phase is indicative of the linear position of the coupler.
摘要翻译：非接触线性位置中心具有并置的发射和接收部分，其间插入有耦合器或滑块部分，带有对称的衰减导电图案。发射器和接收部分上的线圈的电感耦合根据耦合器上图案的线性位置而衰减。产生一个独特的正弦信号，其相位表示耦合器的线性位置。

6. 发明授权

US07015832B2 Pulse width modulation based digital incremental encoder 有权
标题翻译：基于脉宽调制的数字增量式编码器
公开(公告)号：US07015832B2
公开(公告)日：2006-03-21
申请号：US10853330
申请日：2004-05-25
申请人： Asad M. Madni , Jim B. Vuong , Philip Vuong
发明人： Asad M. Madni , Jim B. Vuong , Philip Vuong
IPC分类号： H03M1/10
CPC分类号： G01D5/245 , G01D5/2053
摘要： A digital incremental encoder for generating an output signal indicative of an angular position, a direction of rotation, and a speed of rotation of a shaft. A counter receives a PWM signal indicative of the angular position of the shaft and a clock signal from an angular position sensor, and generates a multi-bit output. A latch latches the multi-bit output, a first bit and a second bit of which are used to generate the output signals that include the first bit. The first bit and the second bit may be XOR'd together to generate an XOR output included in the output signals. A direction of rotation may be derived from a quadrature phase relationship between the first bit and the XOR output. The angular position sensor may be an NCAPS or MT-NCAPS. A linear position sensor may be used instead of an angular position sensor to generate the PWM signal.
摘要翻译：一种用于产生指示轴的角位置，旋转方向和转速的输出信号的数字增量式编码器。计数器接收表示轴的角位置的PWM信号和来自角位置传感器的时钟信号，并产生多位输出。锁存器锁存多位输出，其第一位和第二位用于产生包括第一位的输出信号。第一位和第二位可以被异或在一起以产生包括在输出信号中的XOR输出。可以从第一位和XOR输出之间的正交相位关系导出旋转方向。角位置传感器可以是NCAPS或MT-NCAPS。可以使用线性位置传感器代替角位置传感器来产生PWM信号。

7. 发明授权

US06955097B1 Radial movement capacitive torque sensor 有权
标题翻译：径向运动电容式扭矩传感器
公开(公告)号：US06955097B1
公开(公告)日：2005-10-18
申请号：US10842914
申请日：2004-05-11
申请人： Asad M. Madni , Jim B. Vuong , Robert K. Hansen
发明人： Asad M. Madni , Jim B. Vuong , Robert K. Hansen
IPC分类号： G01L3/10 , G01L5/22 , G01L3/14
CPC分类号： G01L5/221 , G01L3/106
摘要： A radial movement capacitive torque sensor includes a pair of concentric capacitor plate rings lying in a common plane, a capacitor plate ring facing the pair of concentric capacitor plate rings, and a paddle assembly disposed between the pair of concentric capacitor plate rings and the capacitor plate ring. The paddle assembly includes a first rotor having a circular opening and having at least one pair of spaced apart bearings mounted thereon, a second rotor having a circular opening and having at least one pivot point located thereon, and at least one paddle having a dielectric head, a curved neck and a body. The curved neck is disposed between a corresponding one of said at least one pair of spaced bearings, and the body is pivotally coupled to a corresponding one of said at least one pivot point. The sensor can be mounted on a shaft having two shaft portions interconnected by an embedded torsion rod to measure the torque applied to the torsion rod when the shaft portions are rotated one with respect to the other.
摘要翻译：径向移动电容式扭矩传感器包括位于公共平面中的一对同心电容器板环，面对一对同心电容器板环的电容器板环和设置在该对同心电容器板环和电容器板之间的桨组件环。叶片组件包括具有圆形开口并且具有安装在其上的至少一对间隔开的轴承的第一转子，具有圆形开口并且具有位于其上的至少一个枢转点的第二转子，以及至少一个具有介电头，弯曲的颈部和身体。弯曲的颈部设置在所述至少一对隔开的轴承中的对应的一个之间，并且主体枢转地联接到所述至少一个枢转点中的对应的一个。传感器可以安装在具有两个轴部分的轴上，该轴通过嵌入的扭力杆互相连接，以便当轴部相对于另一个旋转一个时，测量施加到扭力杆上的扭矩。

8. 发明授权

US06564654B2 Vertical movement capacitive torque sensor 有权
公开(公告)号：US06564654B2
公开(公告)日：2003-05-20
申请号：US09970339
申请日：2001-10-02
申请人： Asad M. Madni , Jim B. Vuong , Mitchell London
发明人： Asad M. Madni , Jim B. Vuong , Mitchell London
IPC分类号： G01L314
CPC分类号： G01L3/106 , G01L5/221
摘要： A vertical movement capacitive torque sensor for a rotating shaft such as the steering column of an automobile includes dielectric vanes interposed between capacitor plates which are moveable proportional to the angular displacement of two shaft portions which are linked by a torsion bar or concentric inner and outer shaft portions, the vanes move in a radial direction perpendicular to the shaft axis. Concentric capacitor rings are provided so that a bridge circuit can easily indicate differential capacitance which is proportional to clockwise or counter-clockwise torque.

9. 发明授权

US06545621B1 Digitally programmable pulse-width modulation (PWM) converter 有权
标题翻译：数字可编程脉宽调制（PWM）转换器
公开(公告)号：US06545621B1
公开(公告)日：2003-04-08
申请号：US10006092
申请日：2001-12-06
申请人： Asad M. Madni , Jim B. Vuong , Philip Vuong
发明人： Asad M. Madni , Jim B. Vuong , Philip Vuong
IPC分类号： H03M160
CPC分类号： H03K7/08
摘要： A digitally programmable pulse-width-modulation (PWM) converter changes a 0% to 100% duty cycle input signal to any desired start and stop duty cycle range; for example, 5% to 95%. This is achieved by the difference in start and stop duty cycles forming a ratio which determines a pair of clock frequencies for modifying the PWM signal to provide the new start and stop duty cycle parameters.
摘要翻译：数字可编程脉冲宽度调制（PWM）转换器将0％至100％的占空比输入信号更改为任何所需的起始和停止占空比范围; 例如5％至95％。这是通过起始和停止占空比的差异来实现的，该比率决定了一对用于修改PWM信号的时钟频率以提供新的起始和停止占空比参数。

10. 发明授权

US06772646B1 Differential capacitive torque sensor 有权
标题翻译：差分电容式扭矩传感器
公开(公告)号：US06772646B1
公开(公告)日：2004-08-10
申请号：US09904067
申请日：2001-07-11
申请人： Asad M. Madni , Robert K. Hansen , Jim B. Vuong
发明人： Asad M. Madni , Robert K. Hansen , Jim B. Vuong
IPC分类号： G01L314
CPC分类号： G01L3/106 , G01L5/221
摘要： A differential capacitive torque sensor for a continuously rotating shaft such as the steering column of an automobile provides an apertured metal cage shielding a dielectric rotor. They are respectively mounted on opposite sides of a split shaft connected by a torsion bar. The relative rotation of the apertured conductive plates and the rotor change the overall differential capacitance of the system to proportionally indicate clockwise or counter-clockwise torque.
摘要翻译：用于诸如汽车转向柱的连续旋转轴的差动电容式扭矩传感器提供了一种屏蔽电介质转子的有孔金属笼。它们分别安装在通过扭杆连接的分离轴的相对侧上。有孔导电板和转子的相对旋转改变系统的总体差分电容以成比例地指示顺时针或逆时针转矩。

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