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    • 13. 发明授权
    • Miniaturized inclinometer for angle measurement with accurate measurement indicator
    • 具有精确测量指示器的角度测量小型倾斜仪
    • US06871413B1
    • 2005-03-29
    • US08990912
    • 1997-12-15
    • Steven W. ArmsChristopher P. Townsend
    • Steven W. ArmsChristopher P. Townsend
    • A61B5/103G01C9/06G01B7/30
    • A61B5/1071A61B5/6831G01C9/06
    • The novel miniaturized inclinometer for angle measurement with accurate measurement indicator is designed to monitor the angular motion of limbs. The device contains at least one inclinometer with signal conditioning electronics, including a microprocessor, placed within a miniature housing. A number of different sensors can be used and positioned in their housings so that their outputs vary as a function of their angle with respect to the gravity sector. The microprocessor controls a multiplexer, which controls the activities of the sensors; performs analog to digital conversions and measures the output curves from the sensor pairs to perform a conversion which results in a three hundred and sixty degree range with respect to gravity. Calibration data is stored in a read only memory and the microprocessor corrects variables to ensure accuracy and measures the difference in angle between the pairs of sensors.
    • 用于具有精确测量指示器的角度测量的小型化倾斜仪旨在监测四肢的角运动。 该装置包含至少一个具有信号调节电子装置的倾角仪,包括放置在微型外壳内的微处理器。 可以使用多个不同的传感器并将其定位在其壳体中,使得它们的输出作为它们相对于重力扇区的角度的函数而变化。 微处理器控制多路复用器,其控制传感器的活动; 执行模数转换,并测量传感器对的输出曲线,进行相对于重力产生三百六十度的转换。 校准数据存储在只读存储器中,微处理器校正变量以确保精度并测量传感器对之间的角度差。
    • 14. 发明授权
    • Miniaturized displacement transducer assembly
    • 小型化位移传感器组件
    • US5777467A
    • 1998-07-07
    • US590835
    • 1996-01-24
    • Steven W. ArmsChristopher P. Townsend
    • Steven W. ArmsChristopher P. Townsend
    • G01B7/24G01D5/22G01B7/14G01B7/30H01F5/00
    • G01D5/2216G01B7/24
    • The novel differential variable reluctance transducer assembly is comprised of an ultra miniaturized device encased in stainless steel. The assembly contains a free sliding, magnetically permeable core and two coils surrounding the core. A split ring mounting adapter system allows for a variable gauge length and interchangeable mounting pins. A highly flexible core carrier tube and support wire allows for significant bending without failure, does not interfere with the coils detection of the core, and protects the core from corrosion. A sleeve strain relief sheath has been incorporated with the sensor to avoid excessive strain to lead wires during and after installation. The position of the core is detected by measuring the coils' differential reluctance and transmitted by means of wires or telemetry to measuring equipment.
    • 新颖的差分可变磁阻传感器组件由一个装在不锈钢中的超小型化器件组成。 该组件包含一个自由滑动的导磁芯和围绕该芯的两个线圈。 开环安装适配器系统允许可变的长度和可互换的安装销。 高度柔性的芯托管和支撑线允许显着的弯曲而不发生故障,不会干扰铁芯的线圈检测,并保护芯不受腐蚀。 传感器已经安装了套筒应变消除护套,以避免安装过程中和安装后导线的过度应变。 通过测量线圈的差分磁阻并通过电线或遥测传输到测量设备来检测磁芯的位置。
    • 19. 发明授权
    • Micropower differential sensor measurement
    • 微功率差动传感器测量
    • US06714763B2
    • 2004-03-30
    • US10215752
    • 2002-08-09
    • Michael John HamelChristopher P. TownsendSteven W. Arms
    • Michael John HamelChristopher P. TownsendSteven W. Arms
    • H04B500
    • G06K19/0701G06K19/0723
    • A sensing device includes a Wheatstone bridge and a source of a stimulation configured to apply the stimulation across two electrodes of the Wheatstone bridge. The device also includes a timing sensitive circuit configured to detect timing of a signal appearing across one of the other electrodes of the bridge as a result of the stimulation being applied. The timing provides a way to read the sensor. The device can be powered remotely and data so read can be transmitted using the remote power. The timing sensitive circuit includes a comparator. The comparator provides a high logic signal for a time related to the reactance of one leg of the Wheatstone bridge, and that provides a reading of a differential sensor having elements in each leg of the bridge.
    • 感测装置包括惠斯通电桥和被配置为在惠斯通电桥的两个电极上施加刺激的刺激源。 该装置还包括定时敏感电路,其被配置为作为施加刺激的结果来检测出现在桥的另一个电极之间的信号的定时。 时序提供了读取传感器的方法。 该设备可以远程供电,并且可以使用远程电源传输所读取的数据。 时序敏感电路包括比较器。 该比较器提供了一个与逻辑信号相关的时间,与惠斯通电桥的一条电抗相关,并提供了一个差分传感器的读数,该差分传感器在桥的每条支路中都有元件。
    • 20. 发明授权
    • Temperature gradient compensation circuit
    • 温度梯度补偿电路
    • US5914593A
    • 1999-06-22
    • US110513
    • 1998-07-06
    • Steven W. ArmsChristopher P. Townsend
    • Steven W. ArmsChristopher P. Townsend
    • G01B7/24G01D5/22G01B7/00G01N27/72G01R33/025
    • G01B7/24G01D5/2216
    • The novel temperature gradient compensation circuit is designed to overcome temperature gradient problems in inductive or capacitive circuits, such as, differential variable reluctance transducers. The system comprises, in one embodiment, the use of an inductive or alternating current bridge which sends its output to a low pass filter in order to remove the alternating current component of the bridge output. The output of the low pass filter is fed into an instrumentation amplifier whose gain can be adjusted. The output of this instrumentation amplifier is a signal that is proportional to the temperature gradient experienced by the alternating current bridge. The output of the alternating current bridge is also fed to a high pass filter and then sent to a demodulator and amplifier. By subtracting the direct current output from the alternating current output, the effects of temperature do not have an effect upon the result.
    • 新颖的温度梯度补偿电路设计用于克服电感或电容电路中的温度梯度问题,如差分可变磁阻传感器。 在一个实施例中,该系统包括使用电感或交流电桥,其将其输出发送到低通滤波器,以便去除桥输出的交流分量。 低通滤波器的输出被馈送到可以调节增益的仪表放大器中。 该仪表放大器的输出是与交流电桥经历的温度梯度成比例的信号。 交流电桥的输出也被馈送到高通滤波器,然后发送到解调器和放大器。 通过从交流输出中减去直流输出,温度的影响对结果没有影响。