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128 条记录 (耗时 0.018 秒)

    Analogue to digital converters
    1.
    发明授权
    Analogue to digital converters 失效
    数字转换器的模拟

    公开(公告)号：US3810151A

    公开(公告)日：1974-05-07

    申请号：US28308872

    申请日：1972-08-23

    申请人： ROSEMOUNT ENG CO LTD

    发明人： JOHNSTON J ,  FELLOWS D

    IPC分类号： H03M1/00 ,  H03K13/02

    CPC分类号： H03M1/00 ,  H03M1/50

    摘要： An analogue-to-digital converter comprises a digital storage means, a digital-to-pulse train converter converting the output of the digital storage means into a pulse train having a frequency representative of the digital number, a comparator comparing the pulse frequency with an analogue input voltage either by converting the pulse frequency into an analogue signal or the analogue input into a pulse frequency, and means responsive to the output of the comparator for periodically updating the number in said digital storage means.

    摘要翻译： 模数转换器包括数字存储装置，将数字存储装置的输出转换为具有表示数字数字的频率的脉冲串的数 - 脉串列转换器，将脉冲频率与 模拟输入电压，通过将脉冲频率转换为模拟信号或将模拟输入转换为脉冲频率，并且响应于比较器的输出来周期性地更新所述数字存储装置中的数字。

    Apparatus for automatically evaluating the voltage at a number of test points sequentially
    2.
    发明授权
    Apparatus for automatically evaluating the voltage at a number of test points sequentially 失效
    用于自动评估测试点数电压的装置

    公开(公告)号：US3810012A

    公开(公告)日：1974-05-07

    申请号：US29823972

    申请日：1972-10-17

    申请人： ROSEMOUNT ENG CO LTD

    发明人： HARRIS E

    IPC分类号： G01R31/28 ,  G01R15/12

    CPC分类号： G01R31/2806

    摘要： Automatic test equipment primarily for printed circuit boards in which each test point is connected sequentially via a scanner and isolating amplifier across a single set of series connected resistors, the resistors in the set being adjusted for each test point in synchronism with the scanner and to a programme to a value for each point such that when a preassigned input potential is present for a test point a standard voltage is produced across a precision resistor included in the set of resistors, the voltage being compared with a standard voltage source and the result of the comparison indicating the deviation of the test point voltage from that assigned.

    摘要翻译： 自动测试设备主要用于印刷电路板，其中每个测试点通过扫描仪顺序连接，并且隔离放大器跨单个串联连接的电阻器，该组中的电阻器与扫描仪同步地针对每个测试点进行调整， 编程为每个点的值，使得当测试点存在预分配的输入电位时，跨越该组电阻器中的精密电阻器产生标准电压，将电压与标准电压源进行比较，并且结果 比较表明测试点电压与分配的偏差之间的偏差。

    Signal processing circuits
    3.
    发明授权
    Signal processing circuits 失效
    信号处理电路

    公开(公告)号：US3731072A

    公开(公告)日：1973-05-01

    申请号：US3731072D

    申请日：1971-07-22

    申请人： ROSEMOUNT ENG CO LTD

    发明人： JOHNSTON J

    IPC分类号： G01F1/12 ,  G01K17/18 ,  G06G7/161 ,  H03K7/06 ,  H03M1/00 ,  H03K13/02

    CPC分类号： H03K7/06 ,  G01F1/125 ,  G01K17/185 ,  G06G7/161 ,  H03M1/60

    摘要： A signal processing circuit comprises a difference amplifier receiving an input signal and a feedback signal. A bistable circuit switches repeatedly between states only when the difference amplifier''s output is non-zero and positive. The feedback signal is developed by a switch that is closed to apply to an integrator a reference signal in response to pulses from the output of the bistable circuit. A source providing a pulse train clocks the bistable circuit. A heat meter in which the input signal comes from a temperature sensitive bridge and the pulse train comes from a flow meter is described.

    摘要翻译： 信号处理电路包括接收输入信号和反馈信号的差分放大器。 只有当差分放大器的输出为非零和正时，双稳态电路才能在状态之间重复切换。 反馈信号由闭合的开关产生，以响应于来自双稳态电路的输出的脉冲而向积分器施加参考信号。 提供脉冲串的源时钟双稳态电路。 描述了其中来自温度敏感桥的输入信号和来自流量计的脉冲串的热量计。

    Two wire telemetry system
    4.
    发明授权
    Two wire telemetry system 失效
    两线电视系统

    公开(公告)号：US3680384A

    公开(公告)日：1972-08-01

    申请号：US3680384D

    申请日：1968-08-20

    申请人： ROSEMOUNT ENG CO LTD

    发明人： GRINDHEIM EARL A

    IPC分类号： G01K1/02 ,  G08C19/02 ,  G01K7/12 ,  G05F1/58

    CPC分类号： G08C19/02 ,  G01K1/024

    摘要： Measuring circuitry including a current controller which has an internal amplifier, and which controls current in response to differential input signals, is excited by an external power source. A reference voltage is established, and a separate voltage signal is also developed from a separate voltage source such as a thermocouple. The reference voltage is compared at an amplifier input with the voltage signal. A voltage is developed across a feedback resistor, and the total current through the circuitry adjusts until the feedback signal balances the signal inputs to the current controller. Total current drawn is thus a function of the voltage signals.

    摘要翻译： 包括具有内部放大器并且响应于差分输入信号控制电流的电流控制器的测量电路被外部电源激发。 建立了参考电压，并且还从单独的电压源（例如热电偶）开发单独的电压信号。 参考电压在放大器输入端与电压信号进行比较。 跨反馈电阻产生电压，通过电路的总电流调整，直到反馈信号将信号输入平衡到电流控制器。 因此，所绘制的总电流是电压信号的函数。

    Pressure sensor for determining fluid velocities
    5.
    发明授权
    Pressure sensor for determining fluid velocities 失效
    用于确定流体流量的压力传感器

    公开(公告)号：US3646811A

    公开(公告)日：1972-03-07

    申请号：US3646811D

    申请日：1969-09-22

    申请人： ROSEMOUNT ENG CO LTD

    发明人： DELEO RICHARD V ,  HAGEN FLOYD W

    IPC分类号： G01P5/14 ,  G01P13/00 ,  G01C21/10

    CPC分类号： G01P5/14

    摘要： A fluid-measuring system comprising an orthogonal velocity sensor utilizing fluid pressures which can be adapted for use in flight or mobile or fixed installations. The sensor comprises a probe that is internally divided into four compartments with the longitudinal axis at right angles to the plane of orthogonal measurement, and with sensing ports oriented in proper relationship to sense the orthogonal directions of velocity moving past the sensor. By measuring pressure differences between chambers on opposite sides of the probe, and using suitable pressure instrumentation the relative airspeed in the orthogonal directions can be determined.

    摘要翻译： 一种流体测量系统，包括利用可用于飞行或移动或固定设备中的流体压力的正交速度传感器。 该传感器包括内部分成四个隔间的探头，纵向轴线与正交测量平面成直角，感测端口定位成正确关系，以感测通过传感器移动的正交速度方向。 通过测量探针相对侧的腔室之间的压力差，并且使用合适的压力仪器，可以确定正交方向上的相对空速。

    Control systems having proportional and integral control
    6.
    发明授权
    Control systems having proportional and integral control 失效
    具有比例和整体控制的控制系统

    公开(公告)号：US3646454A

    公开(公告)日：1972-02-29

    申请号：US3646454D

    申请日：1970-02-24

    申请人： ROSEMOUNT ENG CO LTD

    发明人： SOUTHERN MICHAEL

    IPC分类号： G05B5/01 ,  G06G7/18

    CPC分类号： G05B5/01

    摘要： In a control system having a controller providing an output control signal with at least proportional and integral components, means are provided operative when the output signal reaches a predetermined value to inhibit operation of the integrating means until the control is back within the proportional band so as thereby to prevent integral saturation.

    Shielded capacitance pressure sensor
    7.
    发明授权
    Shielded capacitance pressure sensor 失效
    屏蔽电容式压力传感器

    公开(公告)号：US3619742A

    公开(公告)日：1971-11-09

    申请号：US3619742D

    申请日：1970-05-21

    申请人： ROSEMOUNT ENG CO LTD

    发明人： RUD STANLEY E JR

    IPC分类号： G01L9/00 ,  H01G7/00

    CPC分类号： G01L9/0072 ,  Y10T29/435 ,  Y10T29/49005

    摘要： A capacitance-type pressure sensor having a reference capacitor plate and embodying a shield surrounding the lead wire and reference plate support assembly and maintained at substantially the same potential as the lead wire and reference plate. The shield extends substantially coplanar with the reference capacitor plate so that errors due to shunt capacitances are eliminated.

    Angle of attack measuring device with adjustable airfoil
    8.
    发明授权
    Angle of attack measuring device with adjustable airfoil 失效
    角度测量装置与可调节的AIRFOIL

    公开(公告)号：US3604259A

    公开(公告)日：1971-09-14

    申请号：US3604259D

    申请日：1969-05-02

    申请人： ROSEMOUNT ENG CO LTD

    发明人： HEINSOHN ALLAN B ,  NEARY DONALD M

    IPC分类号： B64D45/00 ,  G01C21/00

    CPC分类号： B64D43/02

    摘要： An angle of attack measuring device is mounted on an aircraft in the airflow-deflection path of an airfoil. The airfoil is operatively secured to the aircraft at a location spaced from the wing. The relative angular position of the airfoil is controllably variable to adapt the operation of the angle of attack measuring system to different flight conditions of the aircraft.