| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | Gas flow type angular velocity sensor | US390875 | 1995-02-17 | US5553497A | 1996-09-10 | Mizuho Doi; Tomoyuki Nishio; Nobuhiro Fueki |
| A gas flow type angular velocity sensor which is capable of reliably sensing an angular velocity while accurately controlling the working gas flow with temperature compensation by using a pair of heat wires as a gas flow sensor without providing any additional gas flow sensor in the sensor body wherein an angular velocity sensing bridge circuit is provided at its current supply source with a temperature compensating circuit connected in series which temperature compensating circuit is composed of a pair of series or parallel connected resistance elements, one of which is a thermosensitive resistance element disposed in a gas path and the other of which is a reference resistance element disposed outside the gas path. | ||||||
| 102 | Gas flow type angular velocity sensor | US40937 | 1993-03-31 | US5385046A | 1995-01-31 | Hiroshi Yamakawa; Masayuki Ikegami; Tsuyoshi Hano |
| An angular velocity sensor of the type wherein a flow of gas forced by a pump into a gas path in the sensor body through a nozzle hole and directed toward a pair of thermosensitive resistance elements provided in the gas path is deflected by the action of an angular velocity and the deflection of the gas flow is sensed by the thermosensitive resistance elements, and which is further provided with a thermostatically-controlled gas path which is heated in order to maintain the gas flow at a constant temperature to avoid the effect of ambient temperature variations. The sensor also is provided with a gas path for absorbing pulsations of the gas flow caused by pumping operations. | ||||||
| 103 | Accelerometer with temperature compensation and matched force transducers | US791940 | 1991-11-13 | US5289719A | 1994-03-01 | Bert D. Egley; Scott D. Orlosky |
| Accelerometer having a frame, a proofmass, one or more force sensitive transducers, and a strut interconnecting the transducers with the proofmass and the frame so that forces are applied to the transducers in accordance with movement of the proofmass along the sensitive axis. The transducers and the strut have similar thermal expansion properties and are arranged in such manner that they can expand together with changes in temperature independently of the frame and the proofmass without imposing any significant strain on the transducers. In certain disclosed embodiments, the transducers are formed as a unitary planar structure from a single piece of crystalline quartz material, and the strut is formed of the same material. | ||||||
| 104 | Torsion beam accelerometer | US758133 | 1991-09-12 | US5220835A | 1993-06-22 | Craig H. Stephan |
| A semiconductor accelerometer having a sensor element supported by a pedestal coupled to a substrate. Coupling between the pedestal and the sensor element includes opposing torsion beams along the axis of flexure coupled through a spring to the pedestal. The spring includes a pair of beams extending in a direction perpendicular to the torsion beams so that thermal expansion applies a tensile force to the torsion beams. | ||||||
| 105 | Closed loop temperature compensation for accelerometer current scale factor | US738269 | 1991-07-31 | US5220831A | 1993-06-22 | William F. Lee |
| A temperature compensation system for a force balance accelerometer is disposed within a feedback loop. A series resistor (82) is connected in series with torque coils (30,80). Connected in parallel with the torque coils and the series resistor (82) is a parallel resistor (84) having a positive resistive temperature coefficient. Series resistor (82) and parallel resistor (84) are placed in close thermal communication with torque coil (30) and a magnetic circuit that includes stators (10 and 12) and permanent magnets (14). As the temperature of the accelerometer increases, less current flows through parallel resistor (84) and more current flows through the torque coil (30), thereby compensating for a reduced torque constant of torque coil that decreases with temperature, yet, enabling the resulting output current, I.sub.o, to remain constant (for a given acceleration). | ||||||
| 106 | Device for measuring rotational speed using an optical fiber sensor | US801910 | 1991-12-03 | US5204619A | 1993-04-20 | Ge Beigbeder; Vincent Michoud |
| A device for measuring the rotational speed of a shaft. A toothed wheel is connected to rotate with the shaft within a magnetic field. A birefringement optic fiber is connected to a light source, and passes through the magnetic field. A magnetorestrictive material is supported in contact with the optical fiber and produces stress on the optical fiber in response to magnetic flux variations. Light emerging from the optical fiber is analyzed with respect to its change in phase to determine the periodic variation in the magnetic field caused by the toothed wheel. | ||||||
| 107 | Piezo electric resonator differential accelerometer | US639116 | 1991-01-08 | US5193392A | 1993-03-16 | Raymond J. Besson; Roger F. Bourquin; Bernard M. Dulmet; Pierre C. Maitre |
| A monoaxial differential accelerometer with frequency output, includes a thin monolithic piezoelectric sensitive plate (10) in which plane a sensitive axis (X) is located. The plate (10) comprises two rectilinear slits (15, 15') parallel with the sensitive axis (X) and defining between them two zones of vibration aligned along the sensitive axis (X) and identically sensitive to the temperature variations. Each vibration zone is located between two electrodes (3, 4, 3, 4') to form resonators (20, 21) whose frequency variations are added for an acceleration directed along the sensitive axis (X) and whose the frequency variations are subtracted for an acceleration directed in a plane perpendicular to the sensitive axis (X). The resonators (20, 21) are inserted in the circuits of two oscillators (73, 74) whose beat frequency constitutes the output signal of the differential accelerometer. | ||||||
| 108 | Fiber-optic accelerometer | US584691 | 1990-09-19 | US5134882A | 1992-08-04 | Robert M. Taylor |
| An accelerometer includes a compliant cylinder supported midway along its length and having equal masses at opposite ends. Two birefringent optical fibers with elliptical cores are wound around the cylinder in opposite senses on opposite sides of the support. Radiation from a source is supplied to one end of both fibers and emerges from the opposite end where it is supplied to respective photodiodes via respective polarizers. Acceleration axially of the cylinder causes extensive strain in one fiber and compressive strain in the other which causes equal and opposite changes in birefringence. A processor subtracts the change in outputs of the photodiodes to provide an acceleration output that is independent of temperature. | ||||||
| 109 | Acceleration sensor | US530162 | 1990-05-29 | US5130600A | 1992-07-14 | Tomonobu Tomita; Yoshinao Mukasa; Masahiro Sasaki; Fumio Ohta; Kazuo Yorihiro |
| This invention relates to an acceleration sensor having less output drift due to temperature change and noise due to external induction which includes a piezoelectric device formed of a piezoelectric member having one or more electrodes provided on each of sides thereof and a lining member of low linear expansion coefficient adhered to one side thereof. A low linear expansion coefficient circuit substrate is provided having the piezoelectric device adhered to one side thereof and having a signal processing electronic circuit formed on the other side thereof. A cabinet having three layers, including an internal conductive resin layer, an adiabatic resin layer, and an external conductive metal layer, completely enclose the piezoelectric device and the circuit substrate. | ||||||
| 110 | Accelerometer with rebalance coil stress isolation | US569398 | 1990-08-17 | US5111694A | 1992-05-12 | Steven A. Foote |
| An improved technique for mounting a coil to a paddle in a force rebalance accelerometer so as to provide relief from temperature induced strains without increasing the mass of the proof mass. The coil is mounted to the paddle at a plurality of mounting sites on the paddle, at least one of which is connected to the paddle by suspension means compliant for movement in the plane of the paddle. In a preferred arrangement, three mounting sites are used, two of which are moveable towards and away from the third, fixed mounting site. | ||||||
| 111 | Temperature compensating circuit | US478611 | 1990-02-12 | US5072614A | 1991-12-17 | Tetsuo Hisanaga |
| A temperature compensating circuit having a third temperature sensor element for detecting an ambient temperature disposed on the same substrate on which first and second temperature sensor elements are located, and a voltage across the third sensor element, generated by supplying a current thereto, is applied to the first and second sensor elements. Therefore, a voltage applied to first and second sensor elements is automatically changed corresponding to change in ambient temperature, and accordingly a difference in temperature between first and second sensor elements can be precisely detected in a form of voltage signal. | ||||||
| 112 | Ultrastable oscillator functioning at atmospheric pressure and under vacuum | US460969 | 1990-04-11 | US5025228A | 1991-06-18 | Evelyne Gerard; Roger Molle; Andre Debaisieux |
| A piezoelectric resonator (1) consists of a piezoelectric reed (2) encased in a housing composed of a cap (7) and a base (8). The resonator (1) is placed in a thermostatically controlled containment (10). The thermostatically controlled containment (10) consists of an inner cell (40) which is screwed into an outer cell (30). These cells (30, 40) each possess sides (34, 44) and a bottom (35, 45). A thermal seal (16) is inserted between the bottom (35) of the outer cell (30) and the bottom (45) of the inner cell (40). The cap (7) of the resonator is soldered over its entire outer surface to the sides (44) and to the bottom (45) of the inner cell (40). The thermostatically controlled containment (10) is placed in a secondary containment (21). A narrow space (22) separates the two containments (10, 21), and the surface of the contact between the two containments is as small as possible. The invention is used for ultrastable on-board oscillators. | ||||||
| 113 | Differential force balance apparatus | US239365 | 1988-08-31 | US5009111A | 1991-04-23 | Paul West; Mirik Hovsepian; Ronald Thomas |
| A force measurement apparatus that provides means to compensate for thermal or other disturbances. The apparatus utilizes non-contact electron transfer mechanisms to provide indications of force sensed on a test mass. A plurality of electrodes are used in a differential measurement mode to provide self-zeroing and distortion compensation. | ||||||
| 114 | Temperature compensation of a steady-state accelerometer | US205194 | 1988-06-10 | US4891982A | 1990-01-09 | Brian L. Norling |
| Prior steady-state accelerometers are subject to errors caused by differential thermal expansion between the force transducers and other accelerometer components. This problem is overcome by the present accelerometer that comprises a housing (32), a proof mass (30), a support (34,36) for mounting the proof mass with respect to the housing, and first and second force sensing elements (38,40). The force sensing elements have DC frequency responses, and are connected between the proof mass and the housing such that differential thermal expansion or contraction between the force sensing elements and the proof mass, support and housing results in rotation of the proof mass about a compensation axis (CA) normal to the sensitive axis (SA). The force sensing elements may extend from their respective points of connection to the proof mass in opposite directions parallel to the sensitive axis to their respective points of connection to the housing, and the force sensing elements may be connected to the proof mass at spaced-apart positions on opposite sides of the compensation axis. | ||||||
| 115 | Temperature compensation for a thermal mass flow meter | US144941 | 1988-01-15 | US4845984A | 1989-07-11 | Martin Hohenstatt |
| For temperature compensation in a thermal mass flow meter with heated and unheated electric resistors which are interlocked to a bridge, a variable temperature-independent electric resistor is connected in parallel to the bridge. The sum of the current through the bridge and of the current through the resistor connected in parallel to the bridge functions as measuring signal. | ||||||
| 116 | Accelerometer package | US510786 | 1983-07-05 | US4750362A | 1988-06-14 | Nicholas F. Pier |
| A plurality of accelerometers enclosed within a housing and mounted upon a thermally conductive support member, a temperature sensor and an optional temperature controlling element within the housing. Each of the accelerometers having two precision surfaces thereon, angular positioned by a predetermined angle, typically ninety degrees, between such surfaces. | ||||||
| 117 | Accelerometer proof mass interface | US853154 | 1986-04-16 | US4726228A | 1988-02-23 | Brian L. Norling |
| An accelerometer with improved resistance to errors due to thermal stress. The accelerometer comprises a proof mass assembly (44), a stator (40), and an interface member (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 member includes first mounting member (110) for securely mounting a first area of the stator with respect to a corresponding first area of the support, and 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 member. | ||||||
| 118 | Fluid pressure pulsed rebalanced accelerometer | US591433 | 1975-06-30 | US3998104A | 1976-12-21 | William Charles Albert |
| A force rebalanced accelerometer utilizing a spherical proof mass disposed in a fluid and in which fluid pressure pulses developed by positive displacement pump are used to balance inertial forces. | ||||||
| 119 | Velocity measurement instruments | US631131 | 1975-11-11 | US3986395A | 1976-10-19 | Daryl Mark Tompkins |
| Apparatus for determining the speed and direction of a moving medium such as the atmosphere. The apparatus includes a sensing element which is exposed to the wind to be subjected to forces which displace the sensing element from its rest position. Attached to the sensing element is a dielectric slab which moves in an electric field. The sensing element resides in an equilibrium position determined by the forces applied by the moving medium and those applied by an electric field between the dielectric slab and a set of conductive plates. The displacement of the sensing element is variously determined to indicate the speed and direction of the wind. | ||||||
| 120 | Velocity sensor | US29458472 | 1972-10-03 | US3811056A | 1974-05-14 | BABA K; WAZAWA K |
| A sensor for measuring the revolution speed of a rotary element which may be a wheel axle of a motor vehicle. The sensor has a rotary disc which is positioned between light-emissive and lightsensitive means which are aligned with each other. The rotary disc has a number of apertures at its entire periphery, which apertures are successively brought into alignment with the flux of the light projected from the light-emissive means to the light-sensitive means as the disc is driven for rotation in synchronism with the rotary element to be measured. The lightsensitive means thus produces a train of pulses having a frequency related to the revolution speed of the rotary disc. The pulses are fed to an electric circuit arrangement for being shaped and amplified and delivered to a system to be controlled on the thus produced output signals. The circuit arrangement includes means which is adapted to compensate for errors which would otherwise be involved in the output signals where the sensor is subject to variation in the ambient temperature.
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