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    High voltage contact monitor with built-in self tester
    1.
    发明授权
    High voltage contact monitor with built-in self tester 失效
    高压接触式显示器，内置自检仪

    公开(公告)号：US6091337A

    公开(公告)日：2000-07-18

    申请号：US268222

    申请日：1999-03-15

    Applicant: Mohammad Javaid Arshad ,  Alan D. Berger

    Inventor： Mohammad Javaid Arshad ,  Alan D. Berger

    IPC: E02F9/24 ,  G08B21/20 ,  G08B21/00

    CPC classification number: G08B21/185 ,  E02F9/245

    Abstract: A sensor system for use on drilling equipment to detect the presence of high voltages during horizontal or vertical drilling and providing an alarm signal corresponding to one of three possibilities: (1) the drilling tool hitting a high voltage line; (2) the drilling tool remaining in contact after hitting the high voltage line; and (3) an exposed or damaged high voltage line in close proximity to the drilling implement. The sensor system detects alternating current, converts the alternating current signal to a pseudo square waveform signal, compares the magnitude of the square waveform signal with a reference voltage, and sounds an alarm if the magnitude of the square waveform signal exceeds the reference voltage. The sensor system also incorporates a self-test circuit which allows an operator to check its functionality before use. The operator can also check the sensor at any time during drilling process.

    Abstract translation: 一种用于钻井设备的传感器系统，用于在水平或垂直钻井期间检测高电压的存在，并提供对应于三种可能性之一的报警信号：（1）钻孔工具击中高压线; （2）撞击高压线路后，钻具保持接触; 和（3）靠近钻机的暴露或损坏的高压线。 传感器系统检测交流电流，将交流信号转换为伪方波信号，将方波信号的幅度与参考电压进行比较，如果方波信号的幅度超过参考电压则发出报警。 传感器系统还集成了自检电路，允许操作员在使用前检查其功能。 操作员还可以在钻孔过程中随时检查传感器。

    Multi-fiber multi-cylinder position method and apparatus using time-of-flight technique
    2.
    发明授权
    Multi-fiber multi-cylinder position method and apparatus using time-of-flight technique 有权
    使用飞行时间技术的多纤维多气缸位置方法和装置

    公开(公告)号：US06710327B2

    公开(公告)日：2004-03-23

    申请号：US09872895

    申请日：2001-06-04

    Applicant: Mohammad Javaid Arshad ,  Alan D. Berger ,  Daniel L. Maierhafer ,  Danley C. Chan

    Inventor： Mohammad Javaid Arshad ,  Alan D. Berger ,  Daniel L. Maierhafer ,  Danley C. Chan

    IPC: G01J104

    CPC classification number: F15B15/2876

    Abstract: A hydraulic actuator is disclosed having a cylinder with a piston that is moved by hydraulic fluid. A laser diode emits a pulse or pulses of light that form laser light beam. These pulses are provided to two or more optical fibers that extend into two or more corresponding cylinders. For each of these cylinders, the optical fiber enters the cylinder at one end of the cylinder and directs a laser beam into the cylinder, and off the piston where the beam is reflected. The reflected beam then exits the cylinder through at least two corresponding optical fibers disposed on either side of the fiber that conducted the light into the cylinder. Each of the optical fibers that receives reflected light is joined together with the others of the optical fibers into one fiber that carries the reflected beam of light to a photo-diode located remote from the cylinder. Each of the photo diodes for each of the two or more cylinders has a corresponding photo diode amplifier. The output of these amplifiers are coupled together and provided to a pulse expansion circuit. The timing circuit that generates the pulse that triggers the laser diode also generates gate pulses for each of the photo diode amplifiers. These gate signals suppress the output of all but one of the photo diode amplifiers. In this manner, the pulse expansion circuit and phase comparator circuits that receive the photo diode amplifier signals will generate an output signal indicative of the time-of-flight of the laser light pulse in only one cylinder at a time. This permits the system to select a specific cylinder and generate a signal indicative of the position of the piston within the cylinder: the time-of-flight of the laser light pulse.

    Abstract translation: 公开了一种液压致动器，其具有带有通过液压流体移动的活塞的气缸。 激光二极管发射形成激光束的脉冲或脉冲。 这些脉冲被提供给延伸到两个或更多个相应气缸中的两个或更多个光纤。 对于这些气缸中的每一个，光纤在气缸的一端进入气缸，并将激光束引导到气缸中，并从激光束反射出活塞。 反射光束然后通过设置在光纤的任一侧上的至少两个对应的光纤离开圆筒，该光纤将光导入圆筒。 接收反射光的每个光纤与其他光纤连接在一起，将一个光纤传送到远离气缸的光电二极管。 两个或多个气缸中的每一个的每个光电二极管具有相应的光电二极管放大器。 这些放大器的输出端耦合在一起并提供给脉冲扩展电路。 产生触发激光二极管的脉冲的定时电路也为每个光电二极管放大器产生栅极脉冲。 这些栅极信号抑制除了一个光电二极管放大器之外的所有输出。 以这种方式，接收光电二极管放大器信号的脉冲扩展电路和相位比较器电路将一次产生一个表示激光脉冲在一个气缸中的飞行时间的输出信号。 这允许系统选择特定的气缸并产生指示活塞在气缸内的位置的信号：激光脉冲的飞行时间。

    Multi-fiber cylinder position sensor using time-of-flight technique
    4.
    发明授权
    Multi-fiber cylinder position sensor using time-of-flight technique 有权
    使用飞行时间技术的多光纤汽缸位置传感器

    公开(公告)号：US06769349B2

    公开(公告)日：2004-08-03

    申请号：US09872874

    申请日：2001-06-04

    Applicant: Mohammad Javaid Arshad ,  Alan D. Berger ,  Daniel L. Maierhafer ,  Danley C. Chan

    Inventor： Mohammad Javaid Arshad ,  Alan D. Berger ,  Daniel L. Maierhafer ,  Danley C. Chan

    IPC: F01B3112

    CPC classification number: G01S7/4818 ,  G01S17/10 ,  G01S17/88

    Abstract: A hydraulic actuator is disclosed having a cylinder with a piston that is moved by hydraulic fluid. A light guide in one end of the cylinder directs a laser beam into the cylinder, and off the piston where the beam is reflected. The beam then exits the cylinder through at least two light guides connected to two corresponding optical fibers. Each of the optical fibers are joined together into one fiber that carries the reflected beam of light to a photo-diode located remote from the cylinder. A control circuit measures the time of flight of the laser beam.

    Abstract translation: 公开了一种液压致动器，其具有带有通过液压流体移动的活塞的气缸。 气缸的一端的导光体将激光束引导到气缸中，并将光束从活塞上反射出来。 然后光束通过连接到两个对应的光纤的至少两个光导件离开圆柱体。 每个光纤被连接在一起，其将反射光束传送到位于远离气缸的光电二极管。 控制电路测量激光束的飞行时间。

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