Abstract: A locking device contains a locking cylinder with a freewheeling sleeve (11), cylinder core and tumblers (27). The cylinder core can be rotated by a matching key because the tumblers (27) which lock the cylinder core release the freewheeling sleeve (11) when the key is removed. The freewheeling sleeve (11) is mounted rotationally in a housing (18) and is fixed in a defined rotational position by a latching element in the housing (18), which latching element is loaded (34) radially by a spring element. Upon forcible rotations of the cylinder core, which characterize an overloading situation, the latching element releases the freewheeling sleeve (11). An output element which brings about the desired functions in the vehicle is also located in the housing, as is, furthermore, a coupling element which is rotationally fixed to the output element, is under a radial resetting force and can be displaced radially.

Abstract: A hot-rolling line, a method for photographing the entire width of a hot-rolled metal strip, a method for recording the photographic result of the entire width, a method for appropriately performing quality assurance, and a method for producing a hot-rolled metal strip using them, provide proper quality assurance for delivering a product to a customer. A hot-rolling line includes a near-infrared camera arranged to photograph an entire width of a hot-rolled metal strip on an entry side of a coiler of the hot-rolling line.

Abstract: An embodiment of the present invention is a method of shape forming vessels, the method comprising selecting a pathway to index the vessel across an operation wheel, indexing the vessel, controlling rotational indexing direction of the vessel across selected pathway, and operating on the vessel as the vessel is indexed across the operation wheel along selected pathway. Other embodiment include shaping by contouring length of the vessel, applying decoration to the vessel, wherein the decoration is added at a precise location based in part on reference to the registration spot, and using a controller to select the pathway based in part on desired shape of the vessel.

Abstract: A metal forming die includes a first die half and a second die half moveable relative to the first die half. The first and second die halves define a die cavity when the second die half is in a closed position. A transducer is operable to vibrate the first die half during metal forming.

Abstract: An apparatus for joining two fixed bases having a plurality of can necking stages, is provided. The apparatus minimizes space, and reduces the diameter of a can neck as it transfers a can body from a first fixed base to a second fixed base.

Abstract: A method for processing a plate workpiece supported on a workpiece support. The method includes moving a tool die and a tool punch along a stroke axis and toward a processing position above a support plane of the workpiece support. The processing position corresponds to a region of the plate workpiece having a formed shape, which extends upwardly from the support plane of the workpiece support.

Abstract: A device (1) for straightening a strip of semi-rigid material and feeding the strip into a machine, in particular a metallic sheet into a press or the like. The device comprises a lower frame (3) which carries a set of lower straightening rolls (30), an upper frame (4) which carries a set of upper straightening rolls (40) arranged staggered relative to the lower straightening rolls (30), and a traction mechanism (5) for the strip of material arranged both upstream and downstream from the sets of straightening rolls (30, 40).

Abstract: An embodiment of the present invention is a vessel forming station comprising a plurality of operation wheels, the plurality of operation wheels are configured in opposing facing pairs, a plurality of linear drives are interconnected with the plurality of operation wheels, the plurality of linear drives push opposing facing pairs of the plurality of operations to a closed position causing opposing facing pairs of the operation wheels to engage the vessel and perform operations on the vessel, the linear drives pull the plurality of operation wheels to an open position allowing the vessel to be indexed to other operation positions, and a conveyor system positioned between opposing facing pairs of the plurality of operation wheels engages the vessel and indexes the vessel through the plurality of operations.

Abstract: A can rounding system and method that uses arms that are able to maintain cans in a concentric arrangement during the welding process. The arms enable the can rounding system to maintain the concentric positions in order to achieve improved circular dimensions and increase the overall efficiency in the construction of cylindrical and conical structures, such as wind towers.

Abstract: A die assembly P1 is configured such that an extrusion die 10 is mounted in a die mounting hole 61 formed in a die mounting plate 60 and a metallic material introduced in the die mounting hole 61 is introduced in the extrusion die 10 via a porthole 24 formed in a metallic material pressure receiving surface 22 of the die 10. A material accumulating portion 70 extending to a point on a more extrusion directional downstream side than an inlet position of the porthole 24 is provided outside the porthole 24 in the die mounting hole 61 to accumulate a part 75 of the metallic material introduced into the die mounting hole 61.

Abstract: In some preferred embodiments, an extrusion die 10 for a metallic material includes a die case 20 having a pressure receiving portion 21 with a metallic material pressure receiving surface 22 faced rearward against an extrusion direction, a male die 30 disposed in the die case 20, and a female die 40 disposed in the die case 20. The pressure receiving portion 21 is formed into a convex configuration protruded rearward, and a porthole 24 for introducing the metallic material is provided in an outer periphery of the pressure receiving portion 21. A ratio of a flat state opening area Sb of a porthole inlet portion 24e to a flat state area Sa of the pressure receiving portion 21 is set to 0.15 to 0.80. The extrusion die is configured such that the metallic material pressurized against the metallic material pressure receiving surface 22 is introduced into the die case 20 via the porthole 24 and passes through the extrusion hole 11.

Abstract: A support jaw arrangement for sliding lateral support of rod-shaped and tubular workpieces prior to their entrance into a forming groove of a bending head of a bending machine. The support jaw arrangement includes two support jaws, one on each side of the workpiece. Each support jaw is fastened on a holder to a support bracket which, guided in a longitudinally displaceable manner on a guide block, is displaceable by a drive device from an initial position retracted against the direction of transport of the workpiece parallel to the same, to an end position extended in the direction of transport of the workpiece. One support jaw supports the workpiece in a laterally sliding manner in a region from its tangential entrance into the forming groove, up to a point at a predetermined distance in front of the same while the other support jaw assumes a retracted initial position.

Abstract: When shaping a metal blank (P), the blank (P) is heated to a predetermined temperature, is then cooled using a cooling device (10), and is subsequently placed in a press and is shaped. According to the invention, at least one plate surface, and particularly both plate surfaces, of the blank (P) is/are brought in direct contact with a cooling element (16, 19) in the cooling device (10), and the blank is clamped especially between said cooling elements (16, 19). A corresponding cooling device for a metal blank (P) comprises a first cooling element (16) and a second cooling element (19) which are adjustable relative to each other and between which the blank (P) can be clamped.

Abstract: An embodiment of the present invention is a method of performing non-shape forming operations during vessel shaping, the method comprising indexing a cylinder across a pathway of at least one of an operation wheel, the operation wheel further having a plurality of work zones, performing at the plurality of work zones a plurality of operations on the cylinder in a sequence of a first shaping plurality of operations followed by a non-shaping plurality of operations followed by a second shaping plurality of operations, and effectuating transformation of the cylinder into a shaped vessel. Other embodiment include applying decoration to the cylinder contoured surface during non-shaping operations, trimming the cylinder during non-shaping operations, and top-forming the cylinder during non-shaping operations, to name a few.

Abstract: An embodiment of the present invention is a method of coordinating vessel shaping style and decoration, the method comprising receiving a vessel in a decoration operation, the vessel having a formed shape style, determining the formed shape style, selecting based in part on the formed shape style a decoration style, and decorating the vessel with selected decoration style. Other embodiments include selecting the decoration style based in part on the vessel top form style, selecting the vessel top form style based in part on the decoration style, and selecting a pathway to index the vessel across the operation wheel through the shaping operation.

Abstract: A tube extending along a tube axis is straightened by radially outwardly plastically deforming and expanding the tube by means of an expander mandrel and simultaneously bending the tube by applying radially inwardly directed forces to the tube at three points lying on a triangle. One of the points is level with the mandrel on one side of the tube and the other two points axially flank it in axially opposite directions and bear on the other side of the tube.

Abstract: The invention relates to a hand tool comprising handles and jaws, where the jaws are operated by the handles, and where an anti-slip device is arranged on the outer side of the distal end of a tool handle. The tool handle has a hard surface with low friction enabling the users fingers to slide on the surface of the handle when squeezing the handles together, and the anti-slip device is arranged to be supported against a support surface in order for the user to be able to press the tool handles together in a controlled manner using a force (F) in excess of hand force.

Abstract: A pressing tool having a drive unit, a piston-cylinder unit with a fork-like receiver and an actual clamping pincer. The clamping pincer has a T-shaped mounting which, with a retaining bolt and a retaining bolt receiver, is connected to a fork-like receiver. In the fork-like receiver, a roller holder with two rollers is located. The fork-like receiver is part of the piston-cylinder unit. On actuation of the pressing tool, the piston-cylinder unit is pulled back and thus the roller holder with the rollers is moved forward relative thereto in an axial direction towards the clamping pincer. Thus, the rollers roll on roll flanks of the clamping jaws of the clamping pincer. The clamping pincer is pressed together by the rollers pressing apart the clamping jaws at the rear. Thus, the rollers are supported on a bearing block with sliding bearing surfaces.

Abstract: The present invention relates to a method for adjusting the resonant frequencies of a vibrating microelectromechanical (MEMS) device. In one embodiment, the present invention is a method for adjusting the resonant frequencies of a vibrating mass including the steps of patterning a surface of a device layer of the vibrating mass with a mask, etching the vibrating mass to define a structure of the vibrating mass, determining a first set of resonant frequencies of the vibrating mass, determining a mass removal amount of the vibrating mass and a mass removal location of the vibrating mass to obtain a second set of resonant frequencies of the vibrating mass, removing the mask at the mass removal location, and etching the vibrating mass to remove the mass removal amount of the vibrating mass at the mass removal location of the vibrating mass.

Abstract: A method for determining a physical property of an object in a multi-path clutter environment comprises transmitting an RF interrogation signal to a wireless sensor physically coupled to the object or the fluid in the multi-path clutter environment, wherein the wireless sensor is operable to receive the RF interrogation signal, produce a reference signal and a measurement signal, and transmit the reference signal and the measurement signal in the multi-path clutter environment. The reference signal and measurement signal are delayed by the wireless sensor by an amount of time that may be a function of the unknown physical property. The method also comprises receiving the transmitted reference signal and the transmitted measurement signal and comparing them in the time domain in order to determine the unknown physical property of the object or the fluid.

Abstract: In an internal combustion engine, a metal or a metal compound (10) capable of capturing a sulfur component contained in an exhaust gas is provided in a flow path of the exhaust gas. When the amount of the sulfur content captured by the metal or the metal compound (10) is increased as the lapse of time, a physical property of the metal or the metal compound (10) which varies with increase in the amount of the captured sulfur component is measured. Based on the measurement value, the sulfur component in the gas can be detected.

Abstract: A testing apparatus which is suitable for applying a stress load to a test specimen is provided. The testing apparatus may be used to simulate lithostatic stress on a test specimen, which may be, for example, a portion of a geologic formation. The testing apparatus may also be used in a method of evaluating the expected production of fluids obtainable from in situ pyrolysis of oil shale.

Abstract: A method of vapor sampling and its delivery to the porous sensory element(s) employed in chemical detectors/sensors for vapor(s) identification and quantification. The sampling and delivery system comprises a flow cell in which a sensory membrane is placed parallel to the flow, while an additional flow normal to the membrane is introduced using the Bernoulli effect. The bi-directional flow of vapors increases the interactions between the sensory material and vapor molecules, and enhances sensitivity.

Abstract: A leak detector for use with a piping system, where the leak detector includes a housing configured to be attached to a conduit and a valve configured and arranged for axial movement with respect to the housing. Additionally, there is a magnet attached to the valve for movement therewith. Embodiments of the invention also preferably include a magnetically-actuated switch positioned within the leak detector along an axial flow path of a fluid such that axial movement of the magnet triggers the switch, which indicates fluid flow through the leak detector. In certain embodiments, there is also a leak passageway that permits a relatively small amount of fluid to pass to an outlet side of the valve even when a diaphragm is in seating contact with the valve if fluid pressure on the outlet side of the valve is slightly lower than fluid pressure on an inlet side of the valve.

Abstract: Tracer gas leak detection is provided by a calibration system with a gas leak detector having a test port for receiving a sample containing a tracer gas and coupled to a vacuum pump; a calibrated leak for a calibration sample containing the tracer gas; a mass filter coupled to the test port for receiving the test sample in an operating mode, coupled to the calibrated leak through a calibrated leak valve for receiving the calibration sample in a calibration mode, having controllable transmission of the tracer gas and providing a filtered sample; detector detecting the tracer gas in the filtered sample; a programmable gain element providing a measured value of leak rate in response to the detector signal; and a controller configured, in response to a mode control signal, to operate the leak detector in the calibration mode over two or more working ranges using the calibrated leak.

Abstract: An apparatus and method for leak detection through use of an adapter containing a chamber, an air pressurization port, and detection media instillation port. The apparatus is sealingly or relatively sealingly coupled to a turbo inlet air duct on an internal combustion engine under study, such that the apparatus chamber communicates with the engine's interior void. The apparatus permits pressurized air and detective media, such as smoke or fog, to be introduced through the chamber and into the void of an engine to determine the presence and location of engine system leaks.

Abstract: The invention relates to a method and a device for testing the tightness of a fuel tank of an internal combustion engine, in particular of a vehicle, with a pressure switch which communicates with the interior of the fuel tank, and a diagnosis means for testing the serviceability of the pressure switch by evaluating the switching status of the pressure switch. So that diagnosis of the pressure switch is possible even with the internal combustion engine shut off or the vehicle turned off and for internal combustion engines with exhaust gas turbochargers, it is proposed, according to the invention, that the diagnosis means test the opening behavior of the pressure switch when the temperature rises.

Abstract: The present invention provides a non-destructive test apparatus which can be applied not only to a structure in dry conditions but also to a structure constructed under water or in a location to which it is difficult for a worker to gain access. The non-destructive test apparatus includes a support frame which is disposed adjacent to the target structure and has a vertical guide rail, and a vacuum box which moves upwards or downwards along the guide rail of the support frame. The vacuum box is attached to the target structure and creates a vacuum therein. The non-destructive test apparatus further includes a hoist which is provided on the upper end of the support frame to move the vacuum box upwards or downwards, a fastening unit which fastens the support frame and the vacuum box to the target structure, and a vacuum pump which creates a vacuum in the vacuum box.

Abstract: The present invention provides a technique for crystallizing a desired protein at a high probability; namely, a protein crystallizing agent and a method of crystallizing protein. The present invention also provides a technique for determining the conditions for protein crystallization easily with high efficiency; namely, a method of screening the conditions for protein crystallization and a protein crystallization screening reagent. As the protein crystallizing agent, at least one compound selected from the group consisting of a basic amino acid, acidic amino acid, ester derivative of amino acid and amide derivative of amino acid is used, or at least one of these compounds is used in combination with another protein crystallizing agent.

Abstract: In a concentration sensor using a piezoelectric piece, for instance, a quartz piece in which the natural frequency is varied by adsorption of a sensing target, the object of the present invention is to make the concentration sensor applicable to various fluids to be measured different in viscosity while restricting consumption of the oscillation energy due to interelectrode capacitance, and to be able to cope with plural types of concentration sensors while using a common oscillation circuit.

Abstract: An object of the present invention is to provide a sensing device capable of easily and collectively displaying, based on pieces of time-series data of frequencies of piezoelectric resonators obtained for each concentration of a substance to be absorbed in solutions, pieces of variation data of the frequencies for each concentration caused by an absorption of the substance to be absorbed, in a state of aligning absorption start points. A main structure of the present invention is composed of a unit for setting an absorption start point of a substance to be absorbed in pieces of time-series data, and an editor for performing processing to combine and display at least frequency variation regions in the pieces of time-series data in a state of aligning the absorption start points of the substance to be absorbed.

Abstract: An oven wall three-dimensional profile data (701) representing concave and convex amounts on all over oven walls (14R, 14L) at a right side and left side of a coking chamber (11) is generated by using image signals obtained by a wall surface observation apparatus (200). A resistance index “k” in which a resistance received by pushed coke (15) resulting from a rising gradient existing on the oven wall (14) is indexed is asked by using the oven wall three-dimensional profile data (701). It can be verified that there is a correlation between this resistance index “k” and a pushing load. Accordingly, it is possible to quantitatively evaluate a state of the oven wall (14) affecting on the pushing load.

Abstract: An air flow measuring device has a throttle portion provided in a first sub-passage, a second sub-passage branched from the first sub-passage at an upstream side of the throttle portion, and a flow amount sensor located in the second sub-passage. The second sub-passage is configured to introduce therein a part of air flowing in the first sub-passage, and an inlet of the second sub-passage is open into the first sub-passage at one side in a first radial direction perpendicular to a flow direction of air flowing in the first sub-passage. Furthermore, the throttle portion is provided to gradually reduce a passage dimension of the first sub-passage in a second radial direction, as toward an outlet of the first sub-passage. Here, the second radial direction is perpendicular to a surface defined by the first radial direction and the flow direction of air in the first sub-passage.

Abstract: A brake position sensor unit includes a unitary brake shaft that transmits braking torque to a article to be slowed, connects directly to a brake unit, connects to a resolver and has a plurality of planetary gears rotating thereabout to activate a sensor when the brake unit is set.

Abstract: In a pedal operation amount detecting apparatus, a brake pedal and a crevice fixed to an end portion of an operation rod are rotatably coupled by a coupling shaft, a bush is interposed between the brake pedal and the coupling shaft, and detectors are mounted on an outer peripheral surface of a bush body, which is elastically deformable, in the bush, and an ECU estimates an angle between the brake pedal and the operation rod based on a ratio between distortion loads detected by the detectors, and calculates an operation amount of the brake pedal, that is to say, pedal force and a pedal stroke, based on the angle, thereby enabling to improve mountability by simplifying a configuration and to detect the operation amount with a high degree of accuracy.

Abstract: A method and apparatus in accordance with embodiments of the invention includes a tire pressure detection device comprising an elongated casing having a first casing portion and a second casing portion, configured to house a pressure sensor and the battery therein. The elongated casing also includes a mounting hole for accommodating a connection member configured to connect the casing to a tire valve. The mounting hole is disposed, in one embodiment, and at approximately longitudinal center portion thereof. The first casing portion and the second casing portion are joined to each other by joint portions comprising a hook formed on one of the first casing portion and the second casing portion, and a hook hole formed in another of the first casing portion and the casing portion. The joint portions are located around the mounting hole and both longitudinal ends of the casing. The casing is configured such that a tire valve penetrates a rim of the tire wheel from an outside to an inside thereof.

Abstract: Methods and apparatus to measure physical parameters such as density and porosity of the rock matrix in a near wellbore area are provided. A borehole tool having a number of transducer elements in a transducer array is placed at an outermost surface of the borehole tool and is capable of emitting focused high frequency ultrasound beams into the rock matrix in the near wellbore area. The transducer array may be placed on the ribs or stabilizers of the borehole tool, and/or on a sleeve with a lower rotational speed, and may include a fronting material with similar acoustic impedance as the rock matrix. A method for measuring physical parameters of the rock matrix in a near wellbore area is also provided where a focused high frequency ultrasound beam is emitted into the rock matrix in the near wellbore area from one or more transducer arrays on a borehole tool.

Abstract: Methods and apparatus for collecting a downhole sample are provided. The method may include conveying a sampling tool in a borehole using a first carrier, conveying a sample container in the borehole using a second carrier, and introducing a downhole sample from the sampling tool to the sample container. An apparatus includes a sampling tool disposed on a first carrier, a sample container disposed on a second carrier, wherein the first carrier and the second carrier are independently conveyable in a borehole, and a coupling connectable to the sampling tool and the sample container.

Abstract: Apparatus and method for determining pressure in a well is provided. A sensor for determining the rate of change of pressure in a well comprises: a first cavity body defining an enclosed volume, a portion of one wall of the cavity body being constituted by a pressure sensitive membrane capable of exposure to the well pressure so as to be responsive thereto; and a first capillary connected to the first cavity body at one end and being open to the well pressure at the other end so as to provide pressure communication between the well pressure and the interior of the first cavity body; wherein a length of the first capillary, an internal diameter of the first capillary, and the volume of the first cavity body are such that the sensor has a predetermined pressure response that comprises an input minus a low-pass filtered version of the input, and a predetermined time constant.

Abstract: A wellbore instrument includes a housing configured to traverse a subsurface wellbore. A shock and vibration sensor disposed in the housing and is mounted on a carrier disposed in the housing. The carrier includes at least two, laterally movable elements each having an outer surface configured to contact an inner surface of the housing. The carrier includes an adjustable wedge disposed between the opposed elements. The wedge is arranged such that longitudinal movement thereof causes lateral separation of the laterally movable elements into frictional engagement with the inner surface of the housing.

Abstract: In a flow rate measuring device including a bypass channel having at least one bending portion and at least one channel portions, a detecting element is disposed in the bypass channel to detect the flow rate of measurement target fluid, a ratio L/H of a width H of the channel portion in which the detecting element is disposed, and a distance L from the bending portion at the upstream side of the detecting element to the upstream end portion of the detecting portion is set in range from 0 to 0.7, and a ratio D/H of a distance D from the wall surface of the base side of the detecting element to the center of the detecting portion of the surface of the detecting element and the width H of the channel portion is set in the range from 0.22 to 0.33.

Abstract: Radio transmitting and receiving slot antenna, comprising a transmitting and receiving portion, means for connection to a transmitting and/or receiving circuit, said transmitting and receiving portion being formed of two volumes of liquid delimiting a slot, and means to modify the shape of said volumes of liquid and to modify the width of the slot, said means to modify the shape of said volume of liquid using electrostatic forces, the liquid being electrically conductive, and a control unit controlling the means to deform the volumes of fluid.

Abstract: A total dissolved solids measurement process and device are provided that facilitates total dissolved solids sensing of a subject fluid via relative buoyancy levels of separate float bodies; one buoyed by the subject fluid of varying total dissolved solids and temperatures and another buoyed by a reference fluid of constant total dissolved solids but of a varying temperature matching the subject fluid. The equal temperature baths of the subject fluid and the reference fluid as well as geometrical shape and weighting of the floats conveys the total dissolved solids as the difference in buoyancy levels of the floats. This difference in buoyancy levels is of further benefit for activation of sundry controls.

Abstract: A device (1) for diagnosing a disorder comprises a stop for stopping a human extremity (5), such as a finger, when said extremity exerts a force on the stop. Detection means are provided for detecting said exerted force. The device has a support member (20) for supporting the stop. The stop comprises one or more resilient strips (8,17), each of which projects from the support member up to in each case a free end. The resilient strips are arranged substantially parallel to and at a distance from one another. Each resilient strip can, by being deformed, contact an adjacent resilient strip.

Abstract: A gravity gradiometer is disclosed which has a sensor in the form of bars (41 and 42) which are supported on a mounting (5) which has a first mount section (10) and a second mount section (20). A first flexure web (33) pivotally couples the first and second mount sections about a first axis. The second mount has a first part (25), a second part (26) and a third part (27). The parts (25 and 26) are connected by a second flexure web (37) and the parts (26 and 27) are connected by a third flexure web (35). The bars (41 and 42) are located in housings (45 and 47) and form a monolithic structure with the housings (45 and 47) respectively. The housings (45 and 47) are connected to opposite sides of the second mount section 20. The bars (41 and 42) are connected to their respective housings by flexure webs (59). Transducers (71) are located in proximity to the bars for detecting movement of the bars to in turn enable the gravitational gradient tensor to be measured.

Abstract: A gravity gradiometer is disclosed which has a sensor in the form of bars (41 and 42) which are supported on a mounting (5) which has a first mount section (10) and a second mount section (20). A first flexure web (33) pivotally couples the first and second mount sections about a first axis. The second mount has a first part (25), a second part (26) and a third part (27). The parts (25 and 26) are connected by a second flexure web (37) and the parts (26 and 27) are connected by a third flexure web (35). The bars (41 and 42) are located in housings (45 and 47) and form a monolithic structure with the housings (45 and 47) respectively. The housings (45 and 47) are connected to opposite sides of the second mount section 20. The bars (41 and 42) are connected to their respective housings by flexure webs (59). Transducers (71) are located in proximity to the bars for detecting movement of the bars to in turn enable the gravitational gradient tensor to be measured.

Abstract: A method for reducing imbalance correction weight usage during a balancing operation of a vehicle wheel assembly. An imbalance of the vehicle wheel assembly is initially determined and utilized together with an established acceptable threshold of imbalance for the vehicle wheel assembly to compute a reduced imbalance value having a magnitude less than the determined imbalance. Using the reduced imbalance value, correction weight amounts and placement locations for application to the vehicle wheel assembly are identified.

Abstract: Micromachined gyroscope having a pair of masses disposed generally in a plane and driven for out-of-plane torsional oscillation about a pair of drive axes in the plane for sensing rotation about an input axis perpendicular to the drive axes. The masses are mounted for in-plane torsional movement about sense axes perpendicular to the drive axes and the input axis in response to Coriolis forces produced by rotation of the masses about the input axis. A link connects the two masses together for movement of equal amplitude and opposite phase both about the drive axes and about the sense axes. The masses are connected to transducers having input electrodes constrained for linear in-plane movement relative to stationary electrodes, with that torsional movement of the masses about the sense axes producing changes in capacitance between the input electrodes and the stationary electrodes.

Abstract: Disclosed herein is an angular velocity measuring device including: first and second oscillators elastically supported on a substrate; an elastic connecting beam elastically connecting the first and the second oscillator; and an oscillating means for oscillating the first and the second oscillator for differential oscillation, wherein a viscous force generating means for suppressing in-phase oscillation of the first and the second oscillator is incorporated into the elastic connecting beam.

Abstract: A micro gyro consisting of a vibrating micro scale structure produces a signal whose characteristic frequency shifts in proportion to the applied angular velocity. The vibrating structure consists of a suspended proof mass resonator supported on springs and connected to at least one detector resonator. The structure can be made with multiple semiconductor materials such as silicon, poly-silicon, silicon dioxide, and silicon nitride, using one of many MEMS fabrication processes. The proof mass resonator is designed to have two closely coupled resonant frequencies, with one resonant mode for the drive motion and the second resonant mode for the sense motion. Detector resonators are connected to the vibrating structure such that when the proof mass resonator oscillates due to the Coriolis force in its sense mode, the connections to the detector resonators are stressed by the proof mass resonator, thus changing the resonant frequency of the detector resonators.