公开(公告)号：WO1991019986A1

公开(公告)日：1991-12-26

申请号：PCT/US1991003561

申请日：1991-05-20

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  NORLING, Brian, L. ,  NOVACK, Mitchell, J. ,  LAFOND, Peter, H.

IPC: G01P15/08

CPC classification number: G01P15/132 ,  G01P2015/0828

Abstract: A stress isolation technique for an accelerometer (10) of the type that has a reed (14, 80, 100, 120, 150) that includes a paddle (34, 84, 104, 134, 154), and flexures (36, 86, 106, 126, 156) connecting the paddle to an area of the support. The support includes one or more mounting pads (50-52, 94-96, 114, 130, 160) through which the reed is mounted. The area of the support adjacent to the flexures is divided into first (72, 90, 110, 142, 172) and second (74, 92, 112, 144, 174) portions, such that the flexures are connected to the first portion and such that the mounting pads are positioned solely on the second portion. The flexures are therefore isolated from stress coupled into the reed through the mounting pads.

Abstract translation: 一种用于加速度计（10）的应力隔离技术，该加速度计（10）具有簧片（14,80,100,120,150），其包括桨叶（34,84,104,134,154）和挠曲件（36,86 ，106,126,156）将所述桨连接到所述支撑件的区域。 支撑件包括一个或多个安装垫片（50-52,94-96,114,130,160），通过该安装垫片安装该簧片。 邻近挠曲件的支撑件的区域被分成第一（72,90,110,142,172）和第二（74,92,112,144,174）部分，使得挠曲件连接到第一部分，并且 使得安装垫仅位于第二部分上。 因此，弯曲件与通过安装垫耦合到簧片中的应力隔离。

公开(公告)号：WO1991013328A1

公开(公告)日：1991-09-05

申请号：PCT/US1991000109

申请日：1991-01-04

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  GRLJ, Stephen, F. ,  CORNELIUS, Craig, J.

IPC: G01L01/10

CPC classification number: G01P15/097 ,  G01L1/162 ,  G01P2015/0828

Abstract: A drive system (40) for providing different excitation voltages to the separate beams (16, 18) of a multiple beam vibrating transducer (12) is disclosed. In one embodiment of the invention an amplified voltage at the resonant frequency of a master beam (16) is amplified and applied to a secondary beam, to force the secondary beam (18) to vibrate at the resonant frequency and amplitude of the master beam (16) to force the transducer to resonate at the frequency of the master beam (16). Since the transducer (12) vibrates at the resonant frequency of one of the beams, the transducer energy losses to the adjacent mounting structure are reduced. This results in a higher transducer quality factor so that frequency shifts in the resonant frequency can be readily measured as changes in the parameter that the transducer (12) is intended to mionitor.

公开(公告)号：WO1991001504A1

公开(公告)日：1991-02-07

申请号：PCT/US1990003200

申请日：1990-06-05

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  DAVIDSON, Charles, W.

IPC: G01S01/16

CPC classification number: G01S1/10

Abstract: A method and apparatus for detecting amplitude compression in a guidance system utilizes a transmitting system (30) that transmits two pulses having a predetermined amplitude differential therebetween (26, 27, 28, 29) on each of a plurality of directional beams. The amplitudes of the pulses received from an individual one of the beams are compared (60, 62), and if the amplitude differential between the received pulses is different than the predetermined amplitude differential of the transmitted pulses, a signal indicative of receiver compression is generated (60, 62).

公开(公告)号：WO1991001009A1

公开(公告)日：1991-01-24

申请号：PCT/US1990003201

申请日：1990-06-05

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  NORLING, Brian, L. ,  PETERS, Rex, B.

IPC: G01P15/10

CPC classification number: G01P15/097 ,  G01P1/003 ,  G01P15/0802 ,  G01P2015/0828 ,  G06F11/0757 ,  G06F11/22 ,  G06F11/2294 ,  G06F11/32 ,  G06F11/321 ,  G06F11/328

Abstract: An accelerometer comprising a monolithic crystalline substrate (12), the substrate comprising a support (30), a proof mass (32), and a force transducer (40). The proof mass is connected to the support by one or more proof mass flexures (34) that permit the proof mass to rotate with respect to the support about a hinge axis (HA). One end of the force transducer is connected to the support, and the other end is connected to the proof mass by a transducer flexure (52). The transducer flexure has a thickness substantially less than the thickness of the transducer, such that when the proof mass rotates, the transducer rotates with respect to the proof mass about a transducer axis (TA) that passes through the transducer flexure. Preferably, the transducer axis is offset from the hinge axis in a manner so as to cancel nonlinearities in the force transducer, and the length of the proof mass along the pendulous axis (PA) is less than half the length of the transducer. Damping plates (20, 22) are positioned above and below the proof mass, and provide shock stops and damping.

Abstract translation: 一种包括单片晶体衬底（12）的加速度计，所述衬底包括支撑件（30），校验块（32）和力传感器（40）。 检测质量体通过一个或多个证明质量弯曲（34）连接到支撑件，允许检验质量相对于支撑件围绕铰链轴线（HA）旋转。 力传感器的一端连接到支撑件，另一端通过传感器挠曲件（52）连接到检测质量块。 换能器挠曲的厚度基本上小于换能器的厚度，使得当检测质量旋转时，换能器绕传感器轴线（TA）相对于检验质量块旋转，穿过传感器弯曲。 优选地，换能器轴线以这样的方式偏离铰链轴线，以抵消力换能器中的非线性，并且沿着下摆轴线（PA）的校验质量块的长度小于换能器长度的一半。 阻尼板（20,22）位于检验质量块的上方和下方，并提供冲击停止和阻尼。

公开(公告)号：WO1990010237A1

公开(公告)日：1990-09-07

申请号：PCT/US1990000129

申请日：1990-01-08

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  NOVAK, Mitchell ,  NORLING, Brian, L. ,  WOODRUFF, James, R.

IPC: G01P15/10

CPC classification number: G01P15/097 ,  G01P2015/0828

Abstract: A push-pull accelerometer in which both force transducers (30, 32) lie in a common plane. Thus, when implemented in a silicon micromachined device, both transducers can be fabricated from a single crystal layer (34), thereby producing transducers with closely matched common mode responses.

公开(公告)号：WO1990010206A1

公开(公告)日：1990-09-07

申请号：PCT/US1990000130

申请日：1990-01-08

Applicant: SUNDSTRAND DATA CONTROL, INC.

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

IPC: G01L01/10

CPC classification number: G01P15/097 ,  G01L1/183 ,  G01P15/0802 ,  Y10S73/01

Abstract: A vibrating beam force transducer that can be realized in a silicon micromachined device such as a micromachined accelerometer. The transducer includes a beam (18) having a longitudinal axis (16), and a drive circuit (24) electrically coupled to the beam for causing the beam to oscillate at a resonant frequency that is a function of a force applied along the longitudinal beam axis. The drive circuit provides an electrical current to the beam, and the beam, or a conductive portion (18) thereof, conducts the current along a path that includes an axial component parallel to the longitudinal axis. A magnetic field (B) is created intersecting the axial component, such that the electric current interacts with the magnetic field to produce a force that causes the beam to oscillate at the resonant frequency. In a preferred embodiment, the transducer has a double ended tuning fork configuration, and the current path extends along one beam and back along the other beam.

公开(公告)号：WO1989011737A1

公开(公告)日：1989-11-30

申请号：PCT/US1989001538

申请日：1989-04-12

Applicant: SUNDSTRAND DATA CONTROL, INC.

Inventor： SUNDSTRAND DATA CONTROL, INC. ,  HULSING, Rand, H., II ,  NOVACK, Mitchell, J.

IPC: H01L41/08

CPC classification number: G01L1/10 ,  G01L9/0022 ,  G01P15/097 ,  H01L41/047

Abstract: A technique is described for tailoring the configuration of electrodes (101-104) on a piezoelectric beam (100) such that the tendency of the beam to vibrate in a predetermined flexure mode is enhanced. The mode has a predetermined longitudinal strain versus longitudinal position profile (106). At least two electrodes are mounted on the beam, and the configuration of at least one electrode varies as a function of longitudinal position, such that when a voltage difference is applied between the electrodes, the longitudinal force produced by the electrodes, as a function of longitudinal position, approximates the longitudinal strain versus longitudinal position profile. The configuration may be varied by varying the width of the electrode or the position of the electrode on the underlying beam surface.

公开(公告)号：WO1989011666A1

公开(公告)日：1989-11-30

申请号：PCT/US1989001580

申请日：1989-04-14

Applicant: SUNDSTRAND DATA CONTROL, INC.

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

IPC: G01V13/00

CPC classification number: G01V7/00

Abstract: Apparatus and method for vertically aligning an acceleration sensitive axis of a gravity measurement device (10). The gravity measurement device (10) includes an accelerometer (68), which rotates about a gimbal shaft (62) within a gimbal frame (54). Gimbal frame (54) also rotates about an axis which is preferably oriented at right angle to gimbal shaft (62). A stepping motor (20) rotates accelerometer (68) about gimbal shaft (62) via antibacklash gear (30), idler gear (32), antibacklash gear (48) and drive shaft (50). In a similar fashion, a stepping motor (22) rotates gimbal frame (54). A controller (140) energizes motors (20, 22), to rotate the acceleration sensitive axis of accelerometer (68) until an output signal (170) indicates that the acceleration of gravity is zero. Once two such positions are located, a level reference plane is determined. Controller (140) then rotates accelerometer (68) 90° relative to the reference plane, thus aligning acceleration sensitive axis.

公开(公告)号：WO1988007734A1

公开(公告)日：1988-10-06

申请号：PCT/US1988000809

申请日：1988-03-15

Applicant: SUNDSTRAND DATA CONTROL, INC.

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

IPC: G08B23/00

CPC classification number: G05D1/0615

Abstract: An instrument (10) is disclosed for an aircraft having a windshear warning system to vary the threshold alarm setting as a function of a thermodynamic property of the air and a function of local geographic and seasonal conditions. Specifically, a function generator (16) and other circuitry is disclosed. The output from the function generator (16) and other circuitry is then added to a fixed threshold acceleration signal to produce a threshold alarm signal (12) which has a value that is a function of the temperature of the air (11), in a basic embodiment.

公开(公告)号：WO1988005114A1

公开(公告)日：1988-07-14

申请号：PCT/US1987003370

申请日：1987-12-16

Applicant: SUNDSTRAND DATA CONTROL, INC.

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

IPC: E21B47/024

CPC classification number: E21B47/022

Abstract: A borehole survey system that utilizes strapdown inertial navigation techniques for mapping a borehole while the system probe (10) is continuously moved along a borehole (12) by means of a cable (14) that is wound on a cable reel (16). Signals representative of the acceleration of the probe (10) relative to the three axes of a probe body coordinate system (34) and signals representative of angular rotation of the probe (10) about the three axes of the probe body coordinate system are processed within the signal processor (24) to obtain signals that represent probe velocity and probe position in a level coordinate system (36) that is fixed in orientation relative to the geographic location of the borehole (12). Precise and continuous surveys are accommodated by correction of the level coordinate probe velocity signals and probe position signals with error correction signals that are based on the difference between inertially derived probe body coordinate position signals representative of the distance traveled by the probe (10) along the borehole (12) and a cable length signal that is derived from a cable measurement apparatus (26), which indicates the amount of cable (14) fed into or retrieved from the borehole (12). Error correction also is provided to correct for Coriolis effect, centrifugal acceleration and variations in the earth's gravitational field as a function of probe depth.

Abstract translation: 一种钻孔测量系统，其利用捷联惯性导航技术来绘制井眼，同时系统探针（10）通过缠绕在缆线卷轴（16）上的缆线（14）沿着钻孔（12）连续移动。 代表探针（10）相对于探针身体坐标系（34）的三个轴的加速度的信号和代表探针（10）围绕探针体坐标系的三个轴的角旋转的信号被处理在 所述信号处理器（24）获得表示在相对于钻孔（12）的地理位置定向固定的水准坐标系统（36）中的探测器速度和探测器位置的信号。 通过校正水平坐标探测速度信号和探测位置信号，通过校正基于由探头（10）沿着沿着探测器（10）移动的距离的惯性导出的探针体坐标位置信号之间的差异的误差校正信号来适应精确和连续的测量 钻孔（12）和从电缆测量装置（26）导出的电缆长度信号，其指示馈入或从钻孔（12）取回的电缆的量（14）。 提供误差校正，以校正科里奥利效应，离心加速度和地球重力场的变化作为探头深度的函数。