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    Remote control signal repeater having a bandpass filter and a level slicer
    141.
    发明授权
    Remote control signal repeater having a bandpass filter and a level slicer 失效
    具有带通滤波器和电平限幅器的遥控信号中继器

    公开(公告)号：US5392313A

    公开(公告)日：1995-02-21

    申请号：US846542

    申请日：1992-03-04

    Applicant: Masao Noro

    Inventor： Masao Noro

    IPC: G08C23/04 ,  H04B3/36

    CPC classification number: G08C23/04 ,  G08C2201/40

    Abstract: In a remote control signal repeater, which transmits remote control signals from a remote controller to a main device, having a bandpass filter and a level slicer, the bandpass filter is constructed of a parallel LC resonant circuit and a serial LC resonant circuit connected to each other. The resonant frequencies of the respective resonant circuits are set to the substantially same frequency. A resultant resonant characteristic having two peaks on sides of the original resonant frequency of the parallel LC resonant circuit is obtained and resonance of the serial LC resonant circuit is produced between the two peaks, thereby flattening the portion between the two peaks. The level slicer connected to the bandpass filter includes a class-C amplifier which level-slices output of the bandpass filter, a smoothing circuit which smoothes output of the class-C amplifier and a bias control circuit which variably controls the degree of class-C bias in accordance with a smoothed output of the smoothing circuit. When an undesirable continuous noise is received by a light receiving element, the class-C bias increases to cut off the received continuous noise and when a remote control signal is received, the class-C bias decreases to output the received remote control signal.

    Abstract translation: 在将远程控制信号从遥控器发送到具有带通滤波器和电平限幅器的主设备的遥控信号中继器中，带通滤波器由并联LC谐振电路和串联LC谐振电路构成，串联LC谐振电路 其他。 各谐振电路的谐振频率被设定为基本相同的频率。 获得在并联LC谐振电路的原始谐振频率的两侧具有两个峰的合成谐振特性，并且在两个峰之间产生串联LC谐振电路的谐振，从而使两个峰之间的部分变平。 连接到带通滤波器的电平限幅器包括：C级放大器，其对带通滤波器进行电平切片输出;平滑电路，其对C类放大器的输出进行平滑;以及偏置控制电路，其可变地控制C类 根据平滑电路的平滑输出进行偏置。 当由光接收元件接收到不期望的连续噪声时，C类偏压增加以切断所接收的连续噪声，并且当接收到遥控信号时，C类偏压减小以输出所接收的遥控信号。

    Systems, methods and apparatus for transmitting radio frequency remote control signals
    142.
    发明授权
    Systems, methods and apparatus for transmitting radio frequency remote control signals 失效
    用于发射射频遥控信号的系统，方法和装置

    公开(公告)号：US5383044A

    公开(公告)日：1995-01-17

    申请号：US947705

    申请日：1992-09-18

    Applicant: Robert L. Borchardt ,  William T. McGreevy ,  Efrain Rodriguez

    Inventor： Robert L. Borchardt ,  William T. McGreevy ,  Efrain Rodriguez

    IPC: H04B10/10 ,  H04B10/00

    CPC classification number: H04B10/114 ,  G08C2201/40

    Abstract: Systems, methods and devices are provided for remotely transmitting a control command to a device having a light sensor for receiving the control command in the form of a light energy signal. A radio frequency remote control signal is produced within an enclosure of a remote control unit (such as a hand-held remote control unit) and is radiated therefrom to a radio frequency receiver. The receiver converts the received signal to a light energy signal which it applies to the light sensor of the device to provide the command thereto.

    Abstract translation: 系统，方法和装置被提供用于将控制命令远程发送到具有用于以光能信号的形式接收控制命令的光传感器的装置。 在远程控制单元（例如手持遥控单元）的外壳内产生射频遥控信号，并从其发射到射频接收器。 接收器将接收到的信号转换成适用于设备的光传感器的光能信号，以向其提供命令。

    Method of measuring uncut coal rib thickness in a mine
    145.
    发明授权
    Method of measuring uncut coal rib thickness in a mine 失效
    测量矿井未切割煤肋厚度的方法

    公开(公告)号：US5121971A

    公开(公告)日：1992-06-16

    申请号：US732813

    申请日：1991-07-19

    Applicant: Larry G. Stolarczyk

    Inventor： Larry G. Stolarczyk

    IPC: E21C35/24 ,  E21D23/12 ,  E21D23/14 ,  E21F17/18 ,  G08C15/00 ,  G08C17/04 ,  G08C23/00 ,  G01V5/00

    CPC classification number: E21C35/24 ,  E21D23/12 ,  E21D23/148 ,  E21F17/18 ,  G08C15/00 ,  G08C17/04 ,  G08C23/00 ,  G08C2201/40 ,  G08C2201/51

    Abstract: A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or continuous mine system. The method utilizes a plurality of sensors connected to low magnetic moment transmitters, e.g. 0.1 ATM.sup.2, or high magnetic moment transmitters, e.g. 2.5 ATM.sup.2, that transmit collected data during multiple short burst transmission periods. Prior to transmission, the data is converted to a digital word format. An algorithm in the transmitter microcomputer ensures that random time intervals exist between data transmission bursts thus preventing a data transmission clash at the central receiver. A microcomputer algorithm in the central receiver protects against data contention caused by simultaneous transmission from several sensors. The data is transmitted to the central receiver either through a natural waveguide pathway or through a utility conductor that is magnetically coupled to the transmitter and central receiver by properly oriented electrically short magnetic dipole antennas. The method can be used, for example, to automatically control the positioning of a plurality of longwall roof supports or to transmit data from a longwall drillhead, along the drill rod, to the central receiver. Data can be communicated between a remote location and a surface area by utilizing a system of repeaters inductively coupled to a utility conductor. Use of the repeater system permits operation of mining machines from a surface computer.

    Abstract translation: 一种远距离监测天然资源开采系统如长壁或连续矿井系统中一氧化碳或甲烷气体浓度，长壁屋顶支撑压力，机器参数或未切割煤，天然碱或钾盐层厚度等条件的方法。 该方法利用连接到低磁矩发射机的多个传感器，例如， 0.1 ATM2或高磁矩发射机，例如。 2.5 ATM2，在多个短突发传输期间发送收集的数据。 在传输之前，数据被转换成数字字格式。 发射机微计算机中的一种算法确保数据传输突发之间存在随机时间间隔，从而防止中央接收机的数据传输冲突。 中央接收机中的微计算机算法可以防止由多个传感器同时传输引起的数据争用。 数据通过自然波导路径或通过适当定向的电短磁偶极子天线磁耦合到发射机和中央接收机的公用设施导体传输到中央接收机。 该方法可以用于例如自动控制多个长壁屋顶支撑件的定位或者将数据从长壁钻头沿钻杆传送到中央接收器。 可以通过利用电感耦合到公用设施导体的中继器系统在远程位置和表面区域之间传送数据。 使用中继器系统允许从平面计算机操作采矿机。

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