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公开(公告)号：US4951088A
公开(公告)日：1990-08-21
申请号：US283708
申请日：1988-12-13
CPC分类号： G03G15/0855 , G03G15/5041 , G03G2215/00042
摘要： A toner mass developed control system for use with electronic printers or copiers provides for the measurement of toned photoconductor reflectivity and bare photoconductor reflectivity. The standard control ratio is modified by characterizing the particular sensor unit in use and by taking into account the reflectance from both photoconductor and toner in the toned patch reflectivity measurement. These factors together with a modification for photoconductor reflectance degradation enable accurate control in high optical density development and with highly reflective color toners by altering the control ratio in accordance with these factors.
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公开(公告)号：US5943908A
公开(公告)日：1999-08-31
申请号：US925571
申请日：1997-09-08
IPC分类号： G01F23/284
CPC分类号： G01F23/284
摘要： An apparatus (50, 100, 150) for sensing a surface level (20) of fluid (12) includes a generally cylindrical central conductor (16, 102, 152) for connection to a pulse signal source (26) with a reduced diameter end (28, 104, 154) and an opposite end (24, 124, 168); a generally tubular outer conductor (14) concentric with the central conductor for connection to the pulse signal source and having one open end (32) adjacent the central conductor reduced diameter end and an opposite open end (18) adjacent the central conductor opposite end, the central conductor and the outer conductor forming a transmission line for pulse signals generated by the pulse signal source and a cavity (C) between an interior wall surface of the outer conductor and an exterior surface of the central conductor; a non-metallic seal (54) mounted at the outer conductor open end for sealing the cavity, the central conductor reduced diameter end extending through a central aperture (52) formed in the seal; a circuit board (58) for mounting the pulse signal source and being electrically connected to the central conductor reduced diameter end and to the outer conductor one open end; and either a socket (68) attached to the outer conductor one open end or a collar (112) attached to the circuit board for maintaining the seal in sealing contact with the outer conductor one open end and the central conductor reduced diameter end to prevent the fluid in the cavity from contacting the circuit board.
摘要翻译： 用于感测流体（12）的表面水平（20）的装置（50,100,150）包括用于连接到脉冲信号源（26）的大致圆柱形的中心导体（16,102,152），其具有减小的直径端 （28,104,154）和相对端（24,124,168）; 与中心导体同心的大致管状的外部导体（14），用于连接到脉冲信号源，并且具有邻近中心导体缩小直径端的一个开口端（32）和与中心导体相对端相邻的相对的开口端（18） 中心导体和外导体形成用于由脉冲信号源产生的脉冲信号的传输线和外导体的内壁表面与中心导体的外表面之间的空腔（C）; 安装在外部导体开口端用于密封空腔的非金属密封件（54），中心导体缩小的直径端部延伸穿过形成在密封件中的中心孔口（52）; 电路板（58），用于安装脉冲信号源并电连接到中心导体缩小的直径端和外部导体一个开口端; 以及附接到外导体一个开口端的插座（68）或连接到电路板的套环（112），用于保持密封件与外导体密封接触一个开口端和中心导体减径部分，以防止 空腔中的流体与电路板接触。
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公开(公告)号：US5656774A
公开(公告)日：1997-08-12
申请号：US658083
申请日：1996-06-04
IPC分类号： G01F23/284 , G01F23/00
CPC分类号： G01F23/284
摘要： A method and apparatus (10) for sensing a surface level (24) of fluid (12) in a tank (14) having an electrically conducting pickup tube (20) extending through a wall (16) of the tank (14) and into the fluid (12) includes a time domain reflectometry circuit (40) connected to the tube (20) for generating an incident pulse (68) that travels down the tube (20) and a portion of which is reflected at the surface (24) as a reflected pulse (70, 72) which travels back along the tube (20) and is sensed by the circuit (40). The circuit (40) utilizes the elapsed time between the generation of the incident pulse (68) and the receipt of the reflected pulse to determine the position of the surface (24) relative to a reference point. The robe (20) forms a transmission line with one of a plate (48), an outer tube (110) and a return tube (130).
摘要翻译： 一种用于感测罐（14）中的液体（12）的表面水平（24）的方法和装置（10），其具有延伸穿过所述罐（14）的壁（16）的导电拾取管（20）并且进入 流体（12）包括连接到管（20）的时域反射测量电路（40），用于产生沿管（20）向下行进并且其一部分在表面（24）处反射的入射脉冲（68） 作为沿管（20）返回并由电路（40）感测的反射脉冲（70,72）。 电路（40）利用入射脉冲（68）的产生和反射脉冲的接收之间的经过时间来确定表面（24）相对于参考点的位置。 长袍（20）与板（48），外管（110）和返回管（130）中的一个形成传输线。
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公开(公告)号：US4625176A
公开(公告)日：1986-11-25
申请号：US531565
申请日：1983-09-13
CPC分类号： G03G15/5037 , G01R29/12 , G01R29/24
摘要： This describes a vibrating probe for measuring electrostatic surface potential. A multilayered piezoceramic bender element assembly is provided with a multilayered shield surrounding the bender assembly on all sides except for one opening window. The conductive sense element of the bender assembly is located in the window and is positioned near the surface to be measured. The bender assembly includes a conductive layer sandwiched between a drive piezoceramic layer and a feedback piezoceramic layer. The feedback piezoceramic layer is coated (on the side opposite to the inner conductive layer) with the conductive sense element and with a separate conductive area for connection to a drive oscillator. The multilayered shield is comprised of inner and outer conductive layers sandwiching an insulator. A circuit is provided whereby the sensed signal floats on a high voltage signal applied to the conductive layers of the shield. A drive oscillator also floats on the high voltage signal and is connected to the drive element.
摘要翻译： 这描述了用于测量静电表面电位的振动探头。 多层压电陶瓷弯曲元件组件设置有除了一个打开窗口之外的围绕弯曲组件的多层屏蔽件。 弯曲组件的导电感应元件位于窗口中并且位于待测表面附近。 弯曲组件包括夹在驱动压电陶瓷层和反馈压电陶瓷层之间的导电层。 反馈压电陶瓷层与导电感测元件一起涂覆（在与内部导电层相对的一侧），并具有用于连接到驱动振荡器的单独的导电区域。 多层屏蔽由内绝缘体和外导电层组成。 提供一个电路，由此感测到的信号漂浮在施加到屏蔽的导电层上的高电压信号上。 驱动振荡器也漂浮在高电压信号上并连接到驱动元件。
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5.发明授权
公开(公告)号：US4466731A
公开(公告)日：1984-08-21
申请号：US388810
申请日：1982-06-16
申请人： James R. Champion , Robert W. Pries
发明人： James R. Champion , Robert W. Pries
CPC分类号： G03G15/0855 , G03G15/5041
摘要： A toner concentration control test cycle in which a developed test area is formed on a photoconductor charged to a dark charge level. The optical reflectivity of the developed test area is sensed and the result used to replenish toner if indicated. During the test cycle, the magnetic brush bias potential is altered to produce development of the test patch in the gray area with the level of dark charge held constant at a predetermined nominal level. An electrostatic probe and associated circuitry are provided to maintain dark charge at the nominal level during the test cycle.
摘要翻译： 调色剂浓度控制测试循环，其中在充电到暗电荷水平的感光体上形成显影的测试区域。 检测到开发的测试区域的光学反射率，如果指示，则用于补充调色剂的结果。 在测试周期期间，改变磁刷偏置电位以在灰度区域产生测试贴片的开发，其中暗电荷的电平保持恒定在预定的标称电平。 提供静电探针和相关电路以在测试周期期间将暗电荷维持在额定电平。
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6.发明授权Time-based method and device for determining the dielectric constant of a fluid 失效用于确定流体介电常数的基于时间的方法和装置
公开(公告)号：US5898308A
公开(公告)日：1999-04-27
申请号：US938988
申请日：1997-09-26
申请人： James R. Champion
发明人： James R. Champion
CPC分类号： G01R27/2647 , G01F23/284 , G01N22/04
摘要： A device utilizes micropower, impulse radar and time domain reflectometry to determine the dielectric constant of a fluid. An electrically conductive probe preferably in the form of a transmission line, is inserted at least partially into the fluid. The device includes a signal generator that generates an impulse signal that is propagated along the probe. The time that it takes for the signal to reach the end of the probe is determined. The time of travel of the signal along the probe is then used to determine the dielectric constant of the fluid.
摘要翻译： 一种装置利用微功率，脉冲雷达和时域反射计来确定流体的介电常数。 优选以传输线形式的导电探针至少部分地插入流体中。 该装置包括产生沿探头传播的脉冲信号的信号发生器。 确定信号到达探头末端所需的时间。 然后将信号沿探针的行进时间用于确定流体的介电常数。
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公开(公告)号：US5651286A
公开(公告)日：1997-07-29
申请号：US685251
申请日：1996-07-23
申请人： James R. Champion , Robert D. Shaw
发明人： James R. Champion , Robert D. Shaw
IPC分类号： G01F23/284 , G01F23/00
CPC分类号： G01F23/284
摘要： A method and apparatus (10) for sensing a surface level (24) of fluid (12) in a tank (14) having an electrically conducting pickup tube (20) extending through a wall (16) of the tank (14) and into the fluid (12) includes a time domain reflectometry circuit (40) connected to the tube (20) for generating an incident pulse (68) that travels down the tube (20) and a portion of which is reflected at the surface (24) as a reflected pulse (70,72) which travels back along the tube (20) and is sensed by the circuit (40). The circuit (40) includes a microprocessor (92) which utilizes the elapsed time between the generation of the incident pulse (68) and the receipt of the reflected pulse to determine the position of the surface (24) relative to a reference point and the amount of the fluid (12) in the tank (14) and indicate the amount of fluid at a display (106). The tube (20) forms a transmission line with one of a plate (48), an outer tube (110) and a return tube (130). A sensor (98) connected to the microprocessor (92) generates information representing parameters of the fluid (12) and the microprocessor (92) communicates over a bus line (94).
摘要翻译： 一种用于感测罐（14）中的液体（12）的表面水平（24）的方法和装置（10），其具有延伸穿过所述罐（14）的壁（16）的导电拾取管（20）并且进入 流体（12）包括连接到管（20）的时域反射测量电路（40），用于产生沿管（20）向下行进并且其一部分在表面（24）处反射的入射脉冲（68） 作为沿管（20）返回并由电路（40）感测的反射脉冲（70,72）。 电路（40）包括利用在入射脉冲（68）的产生和反射脉冲的接收之间经过的时间来确定表面（24）相对于参考点的位置的微处理器（92），并且 罐（14）中的流体（12）的量并且指示显示器（106）处的流体量。 管（20）与板（48），外管（110）和返回管（130）中的一个形成传输线。 连接到微处理器（92）的传感器（98）产生表示流体（12）的参数的信息，微处理器（92）通过总线（94）进行通信。
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公开(公告)号：US5608416A
公开(公告)日：1997-03-04
申请号：US557871
申请日：1995-11-14
摘要： This invention is a lightweight, portable, quickly assembled, wide band, discone antenna for high frequency ground wave communication. The disk portion of the antenna is formed of telescoping spokes and the cone portion is formed of separate retractable wire elements. Disassembled, the antenna can be carried in a backpack. It can be assembled in less than ten minutes to achieve non-fading, non-line-of-sight communication.
摘要翻译： 本发明是一种用于高频地面波通信的轻便，便携，快速组合的宽带，有色天线。 天线的圆盘部分由可伸缩辐条形成，并且锥形部分由分开的可伸缩线元件形成。 拆卸后，天线可以携带在背包里。 可以在不到十分钟的时间内组装，实现非褪色，非视线通信。
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公开(公告)号：US4829336A
公开(公告)日：1989-05-09
申请号：US182599
申请日：1988-04-18
CPC分类号： G03G15/0855 , G03G15/5041 , G03G2215/00042
摘要： A patch sensing toner concentration control method and apparatus is provided in which the optical density of reproduction output can be changed without changing the quantity of toner that is deposited on the photoconductor's test patch area. The test patch area receives toner as the patch area passes through a developer station under the influence of a patch development electrical field or vector. Light that is reflected from a bare photoconductor area is compared to light that is reflected from a toned test patch area. The ratio of these two reflected light intensities is used to control the addition of toner to the developer station. Optical density of the reproduction output is changed by changing the toner concentration in the developer station. The toner concentration control method and apparatus of the invention is constructed and arranged to require a fixed or constant ratio of light reflection as an indication of proper toner concentration, independent of the absolute value of toner concentration. Toner concentration, and thereby optical density of reproduction output, is changed by changing the magnitude of the patch development vector, while maintaining the reproduction development vector constant.
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10.发明授权Apparatus and method for measuring and maintaining copy quality in an electrophotographic copier 失效用于在电子照相复印机中测量和保持复印品质的装置和方法
公开(公告)号：US4326796A
公开(公告)日：1982-04-27
申请号：US103143
申请日：1979-12-13
CPC分类号： G03G15/0266 , G03G15/065
摘要： Factors affecting copy quality are continuously adjusted during copying in accordance with the actual charge on the photoconductor relative to a fixed reference potential. The photoconductor, carried on a moving, partially exposed, constant potential conductive support, is sensed by a probe. The probe supplies a signal as a function of the potential on portions of the photoconductor and the conductive support passing by the probe. A circuit converts the probe signals into digitized values representing the current photoconductor potential relative to the support. The digitized values adjust copier parameters to compensate for deviations of photoconductor potential from predetermined desired values.
摘要翻译： 影响复印质量的因素根据光电导体上相对于固定参考电位的实际电荷在复制期间不断调整。 承载在移动的，部分暴露的恒定电位的导电支撑件上的光电导体被探针感测。 探针根据光电导体的部分和通过探针的导电支撑体的电位提供信号。 电路将探测信号转换为表示相对于支持体的当前感光体电位的数字化值。 数字化值调整复印机参数以补偿光电导体电位与预定的期望值的偏差。
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