公开(公告)号：US4751381A

公开(公告)日：1988-06-14

申请号：US896604

申请日：1986-08-13

申请人： Richard A. Dorman

发明人： Richard A. Dorman

IPC分类号： G01B11/02 ,  G11C27/02 ,  H01J5/16

CPC分类号： G01B11/026 ,  G11C27/026

摘要： This invention relates to a detection circuit for use in a servo controlled fiber optic sensor. A low noise signal with an amplitude proportional to the magnitude of the synchronous detection output is produced without the use of filter by a calculation of the average vale of the synchronous detector output signal driving one complete cycle of the dither signal cycle. This value is fed into sample and hold circuitry, which in turn controls the series motor.

摘要翻译： 本发明涉及一种用于伺服控制光纤传感器的检测电路。 通过计算驱动抖动信号周期的一个完整周期的同步检测器输出信号的平均值，产生具有与同步检测输出的幅度成比例的幅度的低噪声信号，而不需要使用滤波器。 该值被馈送到采样和保持电路中，进而控制串联电动机。

公开(公告)号：US4254331A

公开(公告)日：1981-03-03

申请号：US6654

申请日：1979-01-26

申请人： Richard A. Dorman ,  Curtis D. Kissinger

发明人： Richard A. Dorman ,  Curtis D. Kissinger

IPC分类号： G01B11/02 ,  G01D5/26 ,  G01J1/32

CPC分类号： G01D5/268 ,  G01B11/026

摘要： A fiber optic proximity measuring instrument for measuring dynamic changes in the gap between a probe tip and a target includes a light source, two sensors for measuring reflected light and lamp brightness, and a light conducting cable for transmitting light to the target and conducting light reflected from the target back to the reflected light sensor. The lamp intensity is set by a brightness control during setup to produce a mean level of reflected light intensity, and then is automatically regulated to maintain an equal mean intensity at the reflected light sensor despite changes in target reflectivity and cable light conductance.

摘要翻译： 用于测量探针尖端和目标之间的间隙的动态变化的光纤接近度测量仪器包括光源，用于测量反射光和灯亮度的两个传感器，以及用于将光传输到目标物并将光反射的导光电缆 从目标回到反射光传感器。 灯强度由设置中的亮度控制设定，以产生反射光强度的平均水平，然后自动调节，以保持反射光传感器的平均强度，尽管目标反射率和电缆光电导率有变化。

公开(公告)号：US4176555A

公开(公告)日：1979-12-04

申请号：US931664

申请日：1978-08-07

申请人： Richard A. Dorman

发明人： Richard A. Dorman

IPC分类号： G01D5/14 ,  G01V3/10 ,  G08C19/10 ,  G01H11/00

CPC分类号： G01V3/102 ,  G01D5/14 ,  G08C19/10

摘要： A controlled carrier current measuring sensor/transducer signal amplifier system comprising a carrier oscillator for providing a carrier voltage oscillatory signal of known frequency and fixed voltage magnitude. A differential amplifier has the carrier voltage oscillatory signal supplied to one of its inputs. A reference impedance and a variable impedance sensor transducer are connected in a series circuit across the output of the differential amplifier and a first feedback signal is fed back to a second input of the differential amplifier with the first feedback signal comprising the sum of the voltage across the reference impedance and the variable impedance sensor transducer. A buffer amplifier has its input connected to the juncture of the reference impedance and the variable impedance sensor/transducer for deriving an output voltage representative of the instantaneous value of the voltage across the variable impedance sensor/transducer. The output voltage signal from the output of the buffer amplifier is fed back to a third input to the differential amplifier in opposition to the first feedback signal for regulating the current supplied through the reference impedance and the variable impedance sensor/transducer to a substantially constant value whereby the output voltage signal from the output of the buffer amplifier provides a measure of the impedance of the variable impedance sensor/transduer. Preferably, the system further includes shielded conductors interconnected between the reference impedance and the variable impedance sensor/transducer and between the juncture thereof and the input to the buffer amplifier and the output from the buffer amplifier is fed back to the shielding of the shielded conductors whereby the effects of stray capacitance on any measurement obtained from the variable impedance sensor/transducer are minimized.

摘要翻译： 一种受控载波电流测量传感器/换能器信号放大器系统，包括用于提供已知频率和固定电压幅度的载波电压振荡信号的载波振荡器。 差分放大器将载波电压振荡信号提供给其一个输入。 参考阻抗和可变阻抗传感器传感器连接在差分放大器的输出端上的串联电路中，并且第一反馈信号被反馈到差分放大器的第二输入端，第一反馈信号包括两端的电压之和 参考阻抗和可变阻抗传感器。 缓冲放大器的输入连接到参考阻抗的接点和可变阻抗传感器/换能器，用于导出表示可变阻抗传感器/换能器两端的电压的瞬时值的输出电压。 来自缓冲放大器的输出的输出电压信号被反馈到差分放大器的第三输入，与第一反馈信号相反，用于将通过参考阻抗提供的电流和可变阻抗传感器/换能器调节到基本恒定的值 由此来自缓冲放大器的输出的输出电压信号提供可变阻抗传感器/转换器的阻抗的量度。 优选地，该系统还包括互连在参考阻抗和可变阻抗传感器/换能器之间并且在其接合点和缓冲放大器的输入端之间的屏蔽导体，并且来自缓冲放大器的输出被反馈到屏蔽导体的屏蔽，由此 杂散电容对从可变阻抗传感器/换能器获得的任何测量的影响最小化。

公开(公告)号：US4067225A

公开(公告)日：1978-01-10

申请号：US779748

申请日：1977-03-21

申请人： Richard A. Dorman ,  Curtis D. Kissinger ,  Lawrence J. Lagace, Jr.

发明人： Richard A. Dorman ,  Curtis D. Kissinger ,  Lawrence J. Lagace, Jr.

IPC分类号： G01B7/02 ,  G01B7/16 ,  G01H11/06 ,  G01M1/22 ,  G01B7/22 ,  G01H11/00

CPC分类号： G01B7/023 ,  G01B7/08 ,  G01H11/06

摘要： A new capacitance type non-contact displacement and/or vibration measurement instrument sensing head is described together with a novel method of maintaining calibration of the instrument using such sensing head. The invention takes the form of a central probe member having a first guard ring disposed in coaxial, electrically insulated relationship about the central probe member and driven at the same potential and frequency as the probe member. A secondary driven guard ring coaxially surrounds the first guard ring and is electrically isolated from it and is driven at the same alternating current frequency but at a higher voltage of the order of 1.5 to 1 times higher. The additional secondary guard ring, driven at a suitably boosted voltage level and the same frequency as the central probe member, serves to focus the otherwise divergent electric field, thus producing a very significant improvement in the output linearity when operated at relatively large displacements. Experiments have shown that a probe in accordance with the invention of 1 inch overall diameter can now be used to measure displacements up to approximately 1 inch, whereas previously a probe of the similar outside diameter could be used to measure displacements of only approximately 1/10 of an inch, unless some form of electronic linearization of its output was employed. With the improved sensing head assembly of this invention calibration of the instrument can be more easily maintained by simply removing the probe from a measurement position, applying a ground potential to the secondary guard ring and adjusting the output of the instrument to a fixed reference value to thereby recalibrate the instrument.

摘要翻译： 描述了新的电容型非接触位移和/或振动测量仪器感测头以及使用这种感测头维持仪器的校准的新颖方法。 本发明采用中心探针部件的形式，该中心探针部件具有围绕中心探针部件以同轴电绝缘的关系设置并以与探针部件相同的电位和频率被驱动的第一保护环。 二次驱动保护环同轴地围绕第一保护环并且与其电隔离并且以相同的交流频率驱动，但是在1.5至1倍的更高电压下被驱动。 以适当升高的电压电平驱动并且与中心探针构件的频率相同的辅助保护环用于聚焦另外发散的电场，从而在以较大的位移运行时产生非常显着的输出线性的改善。 实验已经表明，现在可以使用根据本发明的1英寸总直径的探针来测量高达约1英寸的位移，而先前，类似外径的探针可以用于仅测量约1/10的位移 一英寸，除非采用其输出的某种形式的电子线性化。 利用本发明的改进的感测头组件，可以通过简单地从测量位置移除探针，将接地电位施加到第二保护环并将仪器的输出调节到固定的参考值，从而可以更容易地维持仪器的校准 从而重新校准仪器。