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    On-board tire strut fault apparatus for aircraft and the like
    4.
    发明授权
    On-board tire strut fault apparatus for aircraft and the like 失效
    用于飞机和类似的板载轮胎故障装置

    公开(公告)号：US3900828A

    公开(公告)日：1975-08-19

    申请号：US49220974

    申请日：1974-07-26

    Applicant: BLH ELECTRONICS

    Inventor： LAGE DAVID A ,  SENOUR DONALD A

    IPC: B60C23/06 ,  B64C25/36 ,  G01G19/07 ,  G08G1/12

    CPC classification number: G01G19/07 ,  B60C23/007 ,  B60C2200/02 ,  B64C25/36

    Abstract: In an aircraft or other multi-wheeled vehicle equipped with strain-gage transducers for sensing the loading conditions extant at sites of ground support, defective or potentially hazardous degradations and faults of tire and/or strut suspensions are signalled automatically by way of electrical comparisons of the outputs from diagonally disposed transducer installations; the transducer provisions of on-board aircraft weight and center-ofgravity systems afford a convenient means for obtaining the outputs needed to excite computing and indicating equipment which insure that any such malfunctions, once detected, are locked into displays commanding corrective attention.

    Abstract translation: 1484224监控飞机轮胎BLH ELECTRONICS Inc 1975年4月9日[1974年7月26日] 14494/75标题G1N用于检测飞机主要起落架的轮胎或支柱中的故障的装置，每个支撑四个车轮的支柱包括多个应变计， 或者在支柱中，其互连，使得四轮转向架的一个对角线上的负载与另一个对角线上的负载进行比较，并且任何过大的差异激励报警。 图。 图2示出了用于大型飞机的典型的车轮和支柱阵列，其中应变仪16a-31a与主要起落架相关联，其中翼支撑的支柱12,12a和主体支撑的支柱13,13a。 考虑到包括轮24-27和相关联的应变计24a-27a的转向架，来自对角应变计24a，27a的信号在51处被相加， 如图7所示，并且来自其他对角应变计25a，26a的信号在49处相加。每个输出与54,57处的另一输出的固定比例进行比较，并且59处的差异如果超过预定值则对报警继电器通电， 设定值。 两个主体支柱13,13a上的应变计可以与公共报警器并联连接， 8要检查支柱中的故障，将引线62上的信号与引线65上的信号进行比较，并将引线63上的信号与引线64上的信号进行比较。如果两个比较都产生过大的输出，则适当的支柱报警灯将通电 。

    Ac to de high-accuracy low-level voltage measuring system
    5.
    发明授权
    Ac to de high-accuracy low-level voltage measuring system 失效
    交流到高精度低电压测量系统

    公开(公告)号：US3617878A

    公开(公告)日：1971-11-02

    申请号：US3617878D

    申请日：1969-04-21

    Applicant: BLH ELECTRONICS

    Inventor： SENOUR DONALD A

    IPC: G01G3/147 ,  G01R27/00

    CPC classification number: G01G3/147

    Abstract: An AC to DC system is provided for measuring with high accuracy the low-level output voltage signals from an AC-excited Wheatstone-bridge-type circuit arrangement including electrical strain-responsive elements in its arms. In such a circuit arrangement, output voltages from the initially balanced bridge will be caused by a change in impedance of the strain-responsive elements due to external influences which are to be measured. The output signals from the bridge circuit arrangement are operationally amplified, demodulated to DC, and then read by a digital indicator, such as a digital voltmeter, to give an indication proportional to the to-be-measured influences upon the electrical strain responsive elements. A second demodulator may be used to compensate for system lead resistance and any demodulator inaccuracy, by using the output thereof to control the AC excitation applied to the bridge circuit arrangement input. The second demodulator output may also be directly applied as a reference input for a ratiometer-type digital indication. In one particular application, the strain-responsive elements are mounted as part of a load cell or transducer, and, when loads are applied to the same, the system output indications will be accurately related to the applied load.

    Automatic zero circuitry for indicating devices
    6.
    发明授权
    Automatic zero circuitry for indicating devices 失效
    用于指示设备的自动零电路

    公开(公告)号：US3667041A

    公开(公告)日：1972-05-30

    申请号：US3667041D

    申请日：1969-12-04

    Applicant: BLH ELECTRONICS

    Inventor： SENOUR DONALD A

    IPC: G01R1/28 ,  G01R1/02 ,  G01R1/30

    CPC classification number: G01R1/28

    Abstract: Automatic zero circuitry for low-level signal indicating devices is provided which includes a capacitor at the output of an amplifier for storing a charge, during a given period of time, equal to the drift or offset voltage of the amplifier such that during a measuring period of time, the indicating device will give a true and correct reading. A dual slope integrator in combination with a plurality of field-effect-transistors enables the proper time periods for the storing and reading operations described above.

    Abstract translation: 提供了用于低电平信号指示装置的自动零电路，其包括在放大器的输出处的用于存储电荷的电容器，在给定的时间段内等于放大器的漂移或偏移电压，使得在测量周期期间 的时间，指示装置将给出正确和正确的阅读。 与多个场效应晶体管组合的双斜率积分器使得上述存储和读取操作的适当时间段成为可能。

    Aircraft weight and center of gravity determination system which includes alarm,self-checking,and fault override circuitry
    8.
    发明授权
    Aircraft weight and center of gravity determination system which includes alarm,self-checking,and fault override circuitry 失效
    飞机重量和重量测定系统中心，包括报警，自检和故障覆盖电路

    公开(公告)号：US3584503A

    公开(公告)日：1971-06-15

    申请号：US3584503D

    申请日：1969-12-04

    Applicant: BLH ELECTRONICS

    Inventor： SENOUR DONALD A

    IPC: B64D45/00 ,  G01G19/07 ,  G01M1/12

    CPC classification number: G01M1/125 ,  G01G19/07

    Abstract: An aircraft gross weight and center of gravity determination system is provided for measuring, computing and displaying the aircraft gross weight and to determine the center of gravity thereof. The weight of the aircraft and the distribution of the weight are sensed with strain gage transducers mounted in the landing gear axles and in the nose restraint. The output voltage from the transducers is a function of the vertical load thereon. The system incorporates circuitry for determining when the aircraft center of gravity is beyond a preset limit, selfchecking circuitry for determining if each channel and component part of the system is functioning properly, and fault override circuitry for utilizing a complimentary and symmetrical channel in place of a detected faulty channel whereby accurate measurements may be obtained despite the faulty channel.

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