公开(公告)号：EP0104997A3

公开(公告)日：1984-10-24

申请号：EP83401853

申请日：1983-09-23

申请人： FAIRCHILD WESTON SYSTEMS INC.

发明人： Davis, William R. ,  Hart, David Gerald

IPC分类号： H05K07/18 ,  H05K07/16 ,  H05K07/20 ,  H05K05/00

CPC分类号： G11B33/02 ,  G11B33/12 ,  G11B33/1406 ,  H05K7/16 ,  H05K7/18 ,  H05K7/20009

摘要： To minimize the weight of a magnetic tape recorder chassis and cabinet assembly, a wire frame chassis (18) carrying printed circuit board guides (20) and connectors (22) is mounted to one side of a sand cast bezel (24), and polyurethane wall panels (16) are secured to the wire frame. A cabinet cover and underlying tape transport assembly are hinged to the bezel to enable pivoting away from the wire frame, exposing circuit boards for servicing. The "open air flow" characteristic of the wire frame chassis (18) helps cool critical electrical components.

公开(公告)号：EP0274328A3

公开(公告)日：1990-09-12

申请号：EP87403002.6

申请日：1987-12-29

申请人： FAIRCHILD WESTON SYSTEMS, INC.

发明人： Kaye, Seymour ,  Thompson, William R.

IPC分类号： H04N5/225 ,  G02B7/00

CPC分类号： H04N5/2253

摘要： An improved camera for recording stimuli received by the pilot of an aircraft. The camera features an improved mount for alignment of a charge-coupled device image forming element with respect to the hous­ing of the camera. The improved mount comprises inner and outer eccentric adjustment members fitting within a bore in the camera housing. Each adjustment member comprises a cylindrical outer surface and a cylindri­cal bore, the axes of the cylindrical bores and cylin­drical outer surfaces being parallel to but not coin­cident with one another, such that axial misalignment of an image forming element mounted on the inner adjustment member may be corrected by relative rota­tion of the adjustment members. Skew adjustment may also be provided. During assembly, the camera according to the invention is mounted on an alignment fixture bearing a predetermined relation to a target. A video image of the target provided by the image-forming element is displayed on a cathode ray tube display device for comparison to a reference image. The inner and outer adjustment members are rotated until the images are aligned, and are then locked. The aircraft contains a camera mount which is in fixed predetermined relation to an object which is to be imaged precisely.

摘要翻译： 用于记录由飞行员飞行员接收的刺激的改进的相机。 相机具有改进的安装件，用于相对于照相机的壳体对准电荷耦合器件成像元件。 改进的安装件包括配合在相机壳体中的孔内的内偏心调节构件和外偏心调节构件。 每个调节构件包括圆柱形外表面和圆柱形孔，圆柱形孔和圆柱形外表面的轴线彼此平行但不重合，使得安装在内调节构件上的图像形成元件的轴向未对准可以是 通过调节构件的相对旋转来校正。 也可以提供倾斜调整。 在组装期间，根据本发明的照相机安装在与目标物承载预定关系的对准固定件上。 由图像形成元件提供的目标的视频图像显示在阴极射线管显示装置上，以与参考图像进行比较。 旋转内部和外部调节构件直到图像对准，然后被锁定。 该飞机包含相对于要准确成像的物体处于固定的预定关系的相机底座。

公开(公告)号：EP0273832A3

公开(公告)日：1990-06-27

申请号：EP87403003.4

申请日：1987-12-29

申请人： FAIRCHILD WESTON SYSTEMS, INC.

发明人： Kishel, Joseph F.

IPC分类号： G01L13/02 ,  G01L9/10

CPC分类号： G01L9/0085 ,  G01L13/028

摘要： A liquid filled differential pressure detector comprises two pressure sensors. Each sensor is constructed of one or more capsules, which are pairs of diaphragms sealed at their periphries. The innermost diaphragms are interconnected by a tube which contains a rod assembly. The interior of the sensors and interconnection tube form a sealed volume filled with a incompressible liquid. The rod assembly contacts the outermost diaphragm of the sensors and is displaced by expansion and contraction of the capsules caused by a differential pressure change against the outer surface of the sensors. The motion of the rod assembly is transformed into an electrical signal to indicate the pressure measurement. The apparatus is symmetrical about the center point of the tube to reduce error caused by the fluid's thermal expansion by causing equal and opposite forces to cancel, thereby preventing motion of the rod assembly. An overpressure condition results with one sensor completely collapsing with one diaphragm bottoming out against the other, but causes no damage to the capsules due to complementary facing of the diaphragm pairs. The compliance of the diaphragms is chosen to be small enough to cause any gaseous bubbles to be driven into solution during the initial prepressurization of the fluid, ensuring its incompressibility. In a second embodiment, the rod assembly is replaced with a core assembly located at the midpoint of the tube, suspended in a magnetic fluid which separates the incompressible fluid into two identical volumes. The motion of the core assembly, which is due purely to the displacement of the incompressible fluid, is transformed into an electrical signal to indicate a pressure measurement.

摘要翻译： 液体填充差压检测器包括两个压力传感器。 每个传感器由一个或多个胶囊构成，胶囊是在其周边密封的一对隔膜。 最内侧的隔膜通过包含杆组件的管相互连接。 传感器和互连管的内部形成填充有不可压缩液体的密封体积。 杆组件接触传感器的最外面的隔膜，并且由于与传感器的外表面的差压变化引起的胶囊的膨胀和收缩而移位。 杆组件的运动转换成电信号以指示压力测量。 该装置关于管的中心点是对称的，以减少因流体的热膨胀引起的相等和相反的力消除的误差，从而防止杆组件的运动。 超压条件导致一个传感器完全塌陷，一个隔膜相对于另一个隔膜底部，但是由于隔膜对的互补面，不会对胶囊造成损坏。 选择膜片的顺从性足够小以在液体的初始预加压期间使任何气泡被驱入溶液中，确保其不可压缩性。 在第二实施例中，杆组件被位于管中心处的芯组件替代，悬置在磁性流体中，磁流体将不可压缩流体分成两个相同的体积。 核心组件的运动纯粹是由于不可压缩流体的位移而被转换为电信号以指示压力测量。

公开(公告)号：EP0289400A3

公开(公告)日：1990-01-24

申请号：EP88400971.3

申请日：1988-04-21

申请人： FAIRCHILD WESTON SYSTEMS INC.

发明人： Witchey, Michael

IPC分类号： H04J3/16

CPC分类号： H04J3/16 ,  H04J3/0632

摘要： A high speed asynchronous data multiplexer/­demultiplexer system which multiplexes a quantity of independent and asynchronous data streams into a single packetized data stream and then demulti­plexes and presents the original input signals at a remote site in their original form is described. The output bit rate of the demultiplexer is gene­rated responsive to the packet arrival frequency of data from each particular channel and the output buffer fullness of that channel. This process reduces the amount of processing required, such that the effective bandwidth of the system can be greatly expanded.

摘要翻译： 描述了一种高速异步数据多路复用器/解复用器系统，其将一定数量的独立和异步数据流复用到单个分组化数据流中，然后以其原始形式在远程站点解复用和呈现原始输入信号。 解复用器的输出比特率是响应于来自每个特定信道的数据的分组到达频率和该信道的输出缓冲器充满度而产生的。 该过程减少了所需的处理量，使得可以大大扩展系统的有效带宽。

公开(公告)号：EP0289401A2

公开(公告)日：1988-11-02

申请号：EP88400972.1

申请日：1988-04-21

申请人： FAIRCHILD WESTON SYSTEMS INC.

发明人： Schroeder, Gene F. ,  Ellis, Guy T., Jr.

IPC分类号： H04J1/05

CPC分类号： H04J1/05

摘要： The frequency division multiplexed input signal is sampled in an analog-to-digital converter. The samples are translated by mixing with base band frequency signals to yield real and imaginary values corresponding to phase information in the original modulation signals. After transla­tion, the translated samples are filtered in real and imaginary digital filters. After filtering, the original modulation information is recovered by analysis of the position of vectors in the complex plane represented by the real and imaginary values. In the preferred embodiment, a successive approxi­mation technique is used to determine the angle of the vectors to the real axis. Low pass output filtering may be employed after recovery of the modulation signal for improvements in signal to noise ratio.
In the preferred embodiment, the translation is performed by multiplying the input samples by digital values corresponding to sine and cosine values of local oscillator signals at base band frequencies. Preselect filtering may be employed prior to translation to decimate the input samples where possible to reduce subsequent processing requirements.
In the preferred embodiment, the unit is operated in a first initialization mode in which a microprocessor supplies appropriate filter coeffi­cients corresponding to the frequencies of the channels to be demodulated. Thereafter, the microprocessor does not directly control supply of samples or coefficients to the filters for evalua­tion. Very high data rates are thus made possible.

摘要翻译： 频分复用输入信号在模数转换器中采样。 通过与基带频率信号混合来转换样本，以产生对应于原始调制信号中的相位信息的实数和虚数值。 翻译后，翻译的样本在实数和虚数数字滤波器中进行滤波。 滤波后，通过分析由实数和虚数值表示的复平面中的向量的位置来恢复原始调制信息。 在优选实施例中，使用逐次近似技术来确定向量与实轴的角度。 在恢复调制信号之后可以采用低通输出滤波，以提高信噪比。 在优选实施例中，通过将输入样本乘以对应于基带频率的本地振荡器信号的正弦和余弦值的数字值来执行转换。 可以在转换之前采用预选滤波以在可能的情况下抽取输入样本以减少随后的处理要求。 在优选实施例中，该单元在第一初始化模式下操作，其中微处理器提供与要解调的信道的频率对应的适当滤波器系数。 此后，微处理器不直接控制用于评估的滤波器的样品或系数的供给。 因此可以实现非常高的数据速率。

公开(公告)号：EP0186568A2

公开(公告)日：1986-07-02

申请号：EP85402441.1

申请日：1985-12-10

申请人： FAIRCHILD WESTON SYSTEMS INC.

发明人： Waggener, William

IPC分类号： H03D3/00

CPC分类号： H03D3/007 ,  H03D3/006 ,  H03D2200/0025 ,  H03D2200/0035 ,  H03D2200/0062

摘要： A frequency and phase demodulating circuit provides direct frequency demodulaton utilizing only addition, subtraction and multiplication steps. Division of signals is avoided, as is the need for a look-up table of trigonometric values corresponding to the results of such division. By maintaining a substantially constant input amplitude to a quadrature sampler, a number of approximations may be made without introduction of error. Compensation for actual signal variation, as well as for first order errors due to the approximation process of the invention, results in accurate frequency evaluation and avoids the necessity for differentiating an initial phase determination.

公开(公告)号：EP0106738A3

公开(公告)日：1984-06-06

申请号：EP83401826

申请日：1983-09-20

申请人： FAIRCHILD WESTON SYSTEMS INC.

发明人： Bobrek, Pavlo

IPC分类号： H03G03/20

CPC分类号： H03G3/3015 ,  H03G1/007 ,  H03G1/04

摘要： An improved AGC circuit utilizes a two-stage amplifier/ attenuator wherein each stage of the circuit comprises at least one JFET having its gate biased by a buffered feedback voltage derived from both the signal and control voltages. The dynamic range of each stage can be increased by paralleling additional JFETs in each stage. The buffers in the feedback loop are broadband to allow control down to DC, provide isolation between each stage and the signal output and help to minimize the amount of signal offset introduced into the signal by the control voltage.

摘要翻译： 改进的AGC电路使用两级放大器/衰减器，其中电路的每一级包括至少一个JFET，其栅极由从信号和控制电压两者导出的缓冲反馈电压偏置。 每个阶段的动态范围可以通过在每个阶段中并联其他JFET来增加。 反馈回路中的缓冲器是宽带的，允许控制到DC，提供每个级与信号输出之间的隔离，并有助于最小化通过控制电压引入信号的信号偏移量。

公开(公告)号：EP0104996A2

公开(公告)日：1984-04-04

申请号：EP83401852.5

申请日：1983-09-23

申请人： FAIRCHILD WESTON SYSTEMS INC.

发明人： Hart, David Gerald

IPC分类号： G11B15/22

CPC分类号： G11B15/22

摘要： A brake apparatus is provided for tape recorders, particularly of the coaxial reel type, in which a single brake pad, mounted on a brake arm, engages a pair of adjacent coaxially disposed drive wheels for coaxial tape resls. The brake arm is biased by a spring into braking engagement with the drive wheels. A solenoid is operable to withdraw the brake arm, thereby disengaging the brake, when energized. The solenoid is controlled to be energized whenever a drive motor for the tape reels is powered, and to be deenergized when the drive motor is not powered. The disclosed structure provides automatic braking for the tape reels whenever the drive motor loses power or is shut off, thus providing positive mechanical braking both in a power loss condition and in a parking condition for the tape reels.

公开(公告)号：EP0274328A2

公开(公告)日：1988-07-13

申请号：EP87403002.6

申请日：1987-12-29

申请人： FAIRCHILD WESTON SYSTEMS, INC.

发明人： Kaye, Seymour ,  Thompson, William R.

IPC分类号： H04N5/225 ,  G02B7/00

CPC分类号： H04N5/2253

摘要： An improved camera for recording stimuli received by the pilot of an aircraft. The camera features an improved mount for alignment of a charge-coupled device image forming element with respect to the hous­ing of the camera. The improved mount comprises inner and outer eccentric adjustment members fitting within a bore in the camera housing. Each adjustment member comprises a cylindrical outer surface and a cylindri­cal bore, the axes of the cylindrical bores and cylin­drical outer surfaces being parallel to but not coin­cident with one another, such that axial misalignment of an image forming element mounted on the inner adjustment member may be corrected by relative rota­tion of the adjustment members. Skew adjustment may also be provided.
During assembly, the camera according to the invention is mounted on an alignment fixture bearing a predetermined relation to a target. A video image of the target provided by the image-forming element is displayed on a cathode ray tube display device for comparison to a reference image. The inner and outer adjustment members are rotated until the images are aligned, and are then locked. The aircraft contains a camera mount which is in fixed predetermined relation to an object which is to be imaged precisely.

摘要翻译： 用于记录由飞行员飞行员接收的刺激的改进的相机。 相机具有改进的安装件，用于相对于照相机的壳体对准电荷耦合器件成像元件。 改进的安装件包括配合在相机壳体中的孔内的内偏心调节构件和外偏心调节构件。 每个调节构件包括圆柱形外表面和圆柱形孔，圆柱形孔和圆柱形外表面的轴线彼此平行但不重合，使得安装在内调节构件上的图像形成元件的轴向未对准可以是 通过调节构件的相对旋转来校正。 也可以提供倾斜调整。 在组装期间，根据本发明的照相机安装在与目标物承载预定关系的对准固定件上。 由图像形成元件提供的目标的视频图像显示在阴极射线管显示装置上，以与参考图像进行比较。 旋转内部和外部调节构件直到图像对准，然后被锁定。 该飞机包含相对于要准确成像的物体处于固定的预定关系的相机底座。

公开(公告)号：EP0273831A2

公开(公告)日：1988-07-06

申请号：EP87403001.8

申请日：1987-12-29

申请人： FAIRCHILD WESTON SYSTEMS, INC.

发明人： Kim, Jae S.

IPC分类号： H04N3/15

CPC分类号： H04N5/374

摘要： An image sensor is disclosed which is capable of handling large amounts of signal charge with small shift registers. The image sensor includes photoelements 10 in which charge is accumulated in response to sensed conditions; electrically-controllable transfer gates 20 adjacent the photoelements 10 for controllably releasing the charge from the photoelements; vertical shift registers 30, separated from the photoelements 10 by the transfer gates 20, for receiving the charge from the photoelements, and a scan generator connected to the barrier 20 for supplying a series of pulses thereto, a group of pulses being required to release all of the charge accumulated in the photoelements 10.

摘要翻译： 公开了一种能够用小移位寄存器处理大量信号电荷的图像传感器。 图像传感器包括响应于感测到的条件积蓄电荷的光电元件10; 邻近光电元件10的电可控转移门20，用于可控制地将电荷从光电元件中释放出来; 垂直移位寄存器30，其通过传输门20与光电元件10分离，用于从光电元件接收电荷;以及扫描发生器，连接到屏障20，用于向其提供一系列脉冲，需要一组脉冲来释放所有 积累在光电元件10中的电荷。