公开(公告)号：WO1989002064A1

公开(公告)日：1989-03-09

申请号：PCT/US1988002733

申请日：1988-08-08

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  STEINKE, Karl, O. ,  SCOTT, Byron, G.

IPC: G01D05/30

CPC classification number: G02B6/3576 ,  G01K5/72 ,  G02B6/3512 ,  G02B6/353 ,  G02B6/3532 ,  G02B6/3534 ,  G02B6/3552 ,  G02B6/358

Abstract: A fiber optic thermal switch is described comprising a first fixed fiber optic element (S) for transmitting light from a source of light, a second fixed fiber optic element (D) for transmitting light emitted from the first fiber optic element (S) and a snap-acting element (10), disposed between the ends of each fiber optic element (S, D), for interrupting the path of light flowing between the two fiber optic elements (S, D) in response to a change in temperature. In one specific embodiment, the snap-acting element (10) is in the form of a bimetallic disk (10) which changes its shape from a concave shape to a convex shape in response to a temperature change above a generally fixed transition temperature.

Abstract translation: 描述了一种光纤热敏开关，其包括用于透射来自光源的光的第一固定光纤元件（S），用于透射从第一光纤元件（S）发射的光的第二固定光纤元件（D）和 弹性元件（10），设置在每个光纤元件（S，D）的端部之间，用于响应于温度变化而中断在两个光纤元件（S，D）之间流动的光的路径。 在一个具体实施例中，快动元件（10）是双金属盘（10）的形式，其响应于高于大体上固定的转变温度的温度变化而将其形状从凹形改变为凸形。

公开(公告)号：WO1989000699A1

公开(公告)日：1989-01-26

申请号：PCT/US1988002302

申请日：1988-07-08

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  HULSING, Rand, H.

IPC: G01P03/46

CPC classification number: G01C19/5769 ,  G01C19/5783 ,  G01P3/46 ,  G01P15/08

Abstract: The apparatus includes a parallelogram frame (50) including two accelerometer support surfaces (24, 26) on which are mounted two accelerometers (20 and 22) having their sensitive axes in parallel alignment. The accelerometer support surfaces are connected to opposite ends of a flex member (52), which includes six flexures (32, 34, 36, 38, 40, 42) having parallel bending axes. Two of the flexures (34, 38) are disposed at opposite ends of one side of each flexure member, and have a ''long'' axis that is substantially parallel to the sensitive axes of the accelerometers and aligned with a line connecting their centers of percussion. The centers of mass of the accelerometers and their associated supporting surfaces are coincident with the centers of percussion, and are rigidly connected by the two flexures and by one side (30) of each flex member.

Abstract translation: 该装置包括平行四边形框架（50），该平行四边形框架（50）包括两个加速度计支撑表面（24,26），两个加速度计支撑表面（24,26）安装有两个其平行对准的敏感轴的加速度计（20和22）。 加速度计支撑表面连接到柔性构件（52）的相对端，柔性构件包括具有平行弯曲轴线的六个挠曲件（32,34,36,38,40,42）。 两个挠曲件（34,38）设置在每个弯曲构件的一侧的相对端，并且具有基本上平行于加速度计的敏感轴并且与连接其中心的线对准的“长”轴 的打击乐。 加速度计及其相关联的支撑表面的质心与冲击中心重合，并且通过两个弯曲部和每个柔性部件的一侧（30）刚性连接。

公开(公告)号：WO1988005113A1

公开(公告)日：1988-07-14

申请号：PCT/US1987003442

申请日：1987-12-23

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  PETERS, Rex, B.

IPC: E21B47/022

CPC classification number: E21B47/022

Abstract: Inertial navigation borehole survey system wherein the signals supplied by accelerometers (40) that are contained within the borehole survey system probe (10) are corrected for gravitational gradients encountered as the probe (10) travels through a borehole (12). The gravity correction is effected in the survey signal processor (24) and is based on a gravity gradient signal that mathematically corresponds to formula (I), where f represents the specific force due to gravity; fo represents the specific force of gravity at wellhead (20) of borehole (12); Ro represents the average radius of the earth; rho (H) represents the local density of the geological formation penetrated by the borehole as a function of depth H; and rho ave represents the mean density of the earth. In utilizing the gravitational gradient to generate a gravity correction signal, the signal processor (24) effects a summation process that mathematically corresponds to formula (II), where ( DELTA H)i represents the depth change between the ''ith'' signal processing cycle and the nextmost antecedent processing cycle, and, the summation range extends from the first signal processing cycle performed during the borehole survey through the final signal processing cycle of the borehole survey operation.

Abstract translation: 惯性导航钻孔测量系统，其中由探测器（10）行进穿过钻孔（12）所遇到的重力梯度校正了包含在钻孔测量系统探头（10）内的由加速度计（40）提供的信号。 重力校正在测量信号处理器（24）中实现，并且基于数学上对应于公式（I）的重力梯度信号，其中f表示由重力引起的特定力; fo表示井眼（20）的井口（20）的比重力; Ro代表地球的平均半径; rho（H）表示作为深度H的函数的钻孔渗透的地质构造的局部密度; 而rho ave代表地球的平均密度。 在利用重力梯度来产生重力校正信号的情况下，信号处理器（24）实现数学上对应于公式（II）的求和过程，其中（DELTA H）i表示“第i”个信号处理之间的深度变化 循环和最后一个前提处理循环，累加范围从钻孔测量期间执行的第一个信号处理循环到钻孔测量操作的最终信号处理周期。

公开(公告)号：WO1988000749A1

公开(公告)日：1988-01-28

申请号：PCT/US1987001693

申请日：1987-07-15

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  BATEMAN, Charles, D.

IPC: G08B23/00

CPC classification number: G01C5/005 ,  G05D1/0646

Abstract: An aircraft ground proximity warning system (30) having an inadequate terrain clearance warning mode, wherein the criteria required to generate the warning is modified when the aircraft is flying over undulating or mountainous terrain. The system is responsive to signals representative of the radio altitude (hR), the barometric altitude (hB), the speed (34) of the aircraft, the flap position (62) and the landing gear position (68) to provide warnings when the aircraft is operating below a predetermined altitude with either or both of the landing gear or the flaps not in a landing configuration. The warning system also provides a warning when the aircraft is traveling above a predetermined speed and below a predetermined altitude irrespective of the configuration of the landing gear or the flaps.

公开(公告)号：WO1988000748A1

公开(公告)日：1988-01-28

申请号：PCT/US1987001685

申请日：1987-07-15

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  BATEMAN, Charles, D.

IPC: G08B23/00

CPC classification number: G01C5/005 ,  G05D1/0646

Abstract: An aircraft ground proximity warning system which has three separate warnings: (1) a ''SINK RATE'' advisory warning (28, 38) is generated for combinations of lesser descent rates and greater altitudes; (2) a ''PULL UP'' warning (54) is generated for higher descent rates at lower radio altitudes; and (3) after a predetermined time (60) after the ''SINK RATE'' warning is generated, a ''TERRAIN'' warning (58, 68) is generated to indicate to the pilot of the aircraft that an excessive sink rate condition exists and the aircraft is flying over undulating or montainous terrain.

公开(公告)号：WO1988000352A1

公开(公告)日：1988-01-14

申请号：PCT/US1987001576

申请日：1987-06-25

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  NORLING, Brian, L.

IPC: G01P15/10

CPC classification number: G01P15/097 ,  G01P1/006 ,  G01P2015/0828

Abstract: An accelerometer with a pivoting beam to accommodate differential thermal effects. The accelerometer measures acceleration along a sensitive axis (SA) and comprises a housing (32), a proof mass (30), support means (34) and a coupling assembly (36, 38, 40). The support means mounts the proof mass with respect to the housing. The coupling assembly is connected to the proof mass and housing, and comprises a beam (36) and first and second force sensing elements (38, 40). The beam is mounted for pivotal movement about a compensation axis (CA) normal to the sensitive axis (SA). The first and second force sensing elements are connected to the pivot member at spaced-apart connection points on opposite sides of the compensation axis from one another, such that an acceleration along the sensitive axis results in respective compression and tension forces on the force sensing elements, and such that differential thermal expansion results in rotation of the beam about the compensation axis.

公开(公告)号：WO1988000350A1

公开(公告)日：1988-01-14

申请号：PCT/US1987001460

申请日：1987-06-23

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  HANSON, Richard, A. ,  PETERS, Rex, B. ,  NORLING, Brian, Lee ,  URBACH, Edward, Allan

IPC: G01P15/08

CPC classification number: G01P15/097 ,  G01P15/0888 ,  G01P2015/0828

Abstract: An accelerometer comprising a body (10, 16, 12), proof mass (18, 30, 32), mounting means comprising flexures (20, 22) for mounting the proof mass to the body, and force sensing means (34, 38). The flexures permit translational motion of the proof mass with respect to the body along a sensitive axis SA and rotation of the proof mass with respect to the body about a hinge axis HA that is perpendicular to the sensitive axis. Acceleration of the accelerometer along the sensitive axis results in translational motion of the proof mass along the sensitive axis. The force sensing means reacts to such translational motion by producing a signal indicative of acceleration along the sensitive axis. In a preferred embodiment, the mounting means comprises a pair of fused quartz flexures that are oppositely directed with respect to one another, and the sensing means comprises a pair of vibrating beam force transducers that are connected to the proof mass on opposite sides of the hinge axis from one another. The described assembly method for accelerometers comprises forming bridges between the proof mass and body, the bridges being removed after attachment of the force transducers.

Abstract translation: 一种加速度计，其包括主体（10,16,12），检验质量块（18,30,32），包括用于将证明物质安装到身体的挠曲件（20,22）的安装装置，以及力传感装置（34,38） 。 挠曲件允许检测质量体沿着敏感轴线SA相对于身体的平移运动，并且证明物质相对于身体围绕垂直于敏感轴线的铰链轴线HA旋转。 加速度传感器沿着敏感轴的加速导致检测质量沿着敏感轴的平移运动。 力感测装置通过产生指示沿着敏感轴的加速度的信号来对这种平移运动做出反应。 在优选实施例中，安装装置包括相对于彼此相对地指向的一对熔融石英挠曲件，并且感测装置包括一对振动梁力传感器，其连接到铰链的相对侧上的检验质量块 轴彼此。 所描述的用于加速度计的组装方法包括在检验质量体和身体之间形成桥，桥接件在附接力传感器之后被移除。

公开(公告)号：WO1987006350A1

公开(公告)日：1987-10-22

申请号：PCT/US1987000870

申请日：1987-04-15

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  NORLING, Brian, L.

IPC: G01P15/13

CPC classification number: H01L29/66825 ,  G01P1/006 ,  G01P15/132 ,  H01L27/115

Abstract: An accelerometer with improved resistance to errors due to thermal stress. The accelerometer comprises a proof mass assembly (44), a stator (40), and interface means (90) that includes a plate-like body positioned between the proof mass assembly and the stator. The proof mass assembly includes a reed (72) suspended from a support (70), and a reed capacitor plate positioned on the reed. The body includes a body capacitor plate (94) positioned to form a capacitor with the reed capacitor plate. The interface means includes first mounting means (110) for securely mounting a first area of the stator with respect to a corresponding first area of the support, and second mounting means (114) comprising a mounting element (126) extending between a second area of the stator and a corresponding second area of the support. The mounting element is relatively compliant along a first axis, and relatively rigid along all other axes. The first axis lies in the plane of the body and passes approximately through the first mounting means.

公开(公告)号：WO1987003163A1

公开(公告)日：1987-05-21

申请号：PCT/US1986002197

申请日：1986-10-20

Applicant: SUNDSTRAND DATA CONTROL, INC. ,  BRADY, Arthur, R.

Inventor： SUNDSTRAND DATA CONTROL, INC.

IPC: H05K01/00

CPC classification number: H05K1/036 ,  H05K1/0271 ,  H05K3/3442 ,  H05K2201/0133 ,  H05K2201/0209 ,  H05K2201/068 ,  H05K2201/10727

Abstract: An improved surface mounting component assembly features an intermediate layer (30) of resilient material between a circuit board substrate (24) and a surface layer incorporating a conductor pattern (22) to which leadless chip carriers (12) are connected by pluralities of solder joints (26). The resilient material is selected such that the modulus of rigidity (G) of the intermediate layer (30) has a maximum value that is defined in terms of the thickness of the intermediate layer, the component size, the cyclic temperature range, and the maximum permissible shear force on the solder joints (26). Selecting a resilient material such that the intermediate layer (30) has a modulus of rigidity within the range defined by Equations (1) and (2) solves the problem of thermal cycling failure of solder joints in surface mounted component assemblies. For example, the elastomer acrylonitrile butadiene can be admixed with one or more adhesives including epoxy resins, polymide resins, and phenolic resins in order to formulate a resilient material having a requisite modulus of rigidity as calculated from Equations (1) and (2) for a particular surface mounted component assembly and application. A representative formulation useful for many aerospace applications is phenolic/acrylonitrile butadiene (1:1). Thermal management problems are alleviated by admixing the resilient material with a dielectric, thermally conductive material such as alumina flour. The alumina flour content of the intermediate layer can range from about 5 volume percent to about 40 volume percent.

Abstract translation: 改进的表面安装部件组件具有弹性材料的中间层（30），其在电路板基底（24）和包含导体图案（22）的表面层之间，无引线芯片载体（12）通过多个焊点 （26）。 选择弹性材料使得中间层（30）的刚性模量（G）具有根据中间层的厚度，部件尺寸，循环温度范围和最大值定义的最大值 焊接接头（26）上允许的剪切力。 选择弹性材料使得中间层（30）具有由等式（1）和（2）限定的范围内的刚性模量，解决了表面安装部件组件中焊点热循环故障的问题。 例如，弹性体丙烯腈丁二烯可以与一种或多种粘合剂混合，包括环氧树脂，聚酰亚胺树脂和酚醛树脂，以便配制由等式（1）和（2）计算的具有必要的刚度模量的弹性材料，用于 特定的表面安装组件组件和应用。 适用于许多航空航天应用的代表性配方是酚醛/丙烯腈丁二烯（1:1）。 通过将弹性材料与介电导热材料如氧化铝粉混合来减轻热管理问题。 中间层的氧化铝粉含量可以为约5体积％至约40体积％。

公开(公告)号：WO1987002467A1

公开(公告)日：1987-04-23

申请号：PCT/US1986002220

申请日：1986-10-20

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  PETERS, Rex, B.

IPC: G01P07/00

CPC classification number: G01P15/097 ,  G01P2015/0828

Abstract: A dual sensor, frequency output accelerometer that does not require either high sampling rates or mechanical matching of the sensors to achieve high levels of accuracy. In one embodiment, the accelerometer comprises a first sensor (12, 14, 16) that produces an output signal S1 having a frequency f1 related to acceleration along the sensitive axis, and a second sensor (18, 20, 22) that produces a second signal S2 having a frequency f2 related to acceleration along the sensitive axis, the sensors being arranged such that a given acceleration causes the frequency of one output signal to increase and the frequency of the other output signal to decrease. Velocity change DELTA V during time interval T is determined according to: DELTA V = A[ DELTA PHI + FT + B SIGMA PHI ] where A, F and B are constants, DELTA PHI is the difference between the phase changes of the output signals over time interval T, and SIGMA PHI is the sum of the phase changes of the output signals over time interval T. Higher order correction terms are also described for very high precision applications. Also disclosed is an accelerometer for measuring velocity change during a time interval that includes a subinterval during which electrical power is unavailable.

Abstract translation: 双传感器，频率输出加速度计，不需要高采样率或传感器的机械匹配来实现高水平的精度。 在一个实施例中，加速度计包括产生具有与沿着敏感轴的加速度相关的频率f1的输出信号S1的第一传感器（12,14,16）和产生第二传感器的第二传感器（18,20,22） 具有与沿着敏感轴的加速度相关的频率f2的信号S2，传感器被布置成使得给定的加速度使得一个输出信号的频率增加，而另一个输出信号的频率降低。 时间间隔T内的速度变化DELTA V根据以下方式确定：DELTA V = A [DELTA PHI + FT + B SIGMA PHI]其中A，F和B为常数，DELTA PHI为输出信号相位变化之间的差值 时间间隔T，SIGMA PHI是时间间隔T上输出信号的相位变化的总和。对于非常高精度的应用，还描述了高阶校正项。 还公开了一种用于在包括电力不可用的子间隔的时间间隔期间测量速度变化的加速度计。