70results about How to "Improved vibration stability" patented technology

The Coriolis mass flow meter of this invention comprises two parallel curved flow tubes 1 and 2, a drive unit 15, and a pair of vibration sensors 16 and 17. An inlet-side manifold 24 dividing the flow of a fluid being measured into the two flow tubes 1 and 2 from the inlet thereof, and an outlet-side manifold 25 joining the fluid flows flowing in the two flow tubes 1 and 2 to discharge from the fluid outlet thereof are mechanically connected to a meter body 30 only at the inlet side of the inlet-side manifold 24 and at the outlet side of the outlet-side manifold 25, respectively. With this arrangement, the effects of vibration transmitted from the meter body 30 and all structures connected thereto can be reduced at the joint parts between the inlet-side and outlet-side manifolds 24 and 25 that serve as vibration fulcrums.

The invention discloses a three-dimensional composite friction pendulum vibration isolator based on a nonlinear energy trap. Structural vibration frequency is staggered away from seismic oscillation dominant frequency and a large amount of seismic oscillation input energy is absorbed by using the characteristics of attenuation and absorption of vibration energy, absorption of vibration frequency bandwidth and the like existing in the nonlinear energy trap as well as a vertical vibration isolation disk-shaped spring, so that the multi-dimensional seismic response of a structure is reduced, and seismic hazards of building structures are prevented. The three-dimensional composite friction pendulum vibration isolator comprises a metal sliding sleeve, a disk-shaped spring, a polytetrafluoroethylene sliding joint, a nonlinear energy trap and pile caps, wherein the disk-shaped spring is arranged in the metal sliding sleeve; the polytetrafluoroethylene sliding joint is arranged on the disk-shaped spring; the polytetrafluoroethylene sliding joint is in relative sliding contact with an upper pile cap through a polytetrafluoroethylene coating; the side face of the nonlinear energy trap is connected with the disk-shaped spring through a rigid spring; the nonlinear energy trap is in rolling contact with a lower pile cap through a rolling shaft; sliding surfaces of the upper and lower pile caps are spherical surfaces. The three-dimensional composite friction pendulum vibration isolator is used for resisting possible violent earthquakes.

The invention relates to a device for testing dynamic characteristic parameters of a fixed joint surface of a single-degree-of-freedom system. The device comprises a base, a lower experimental plate, an experimental sample wafer, an upper experimental plate, a piezoelectric acceleration transducer, a bolt, a bracket, a vibration exciter, an impedance head, a charge amplifier, a digital analyzer, a power amplifier, an electronic computer, a normal coupling bolt hole, a lower experimental plate coupling bolt, a tangential coupling bolt hole and a flexible rope. Compared with the prior art, the device has the remarkable advantages of compact structure and clear testing principle; the dynamic characteristic parameters of a normal contact surface and a tangential contact surface can be simultaneously measured; the dynamic characteristic parameters of the contact surfaces in different load states can be measured by adjusting the pre-tightening force of the coupling bolt of the upper experimental plate and the lower experimental plate; the excitation force passes through the center of gravity of the upper experimental plate during measurement; vibration signals of the upper experimental plate and the lower experimental plate are simultaneously measured; the influence of the vibration signal of the base is eliminated during the calculation of a frequency response function of the system; and the device has the characteristics of high efficiency, stability and accuracy.

Hydrogen gas is circulated to cool an electric rotating machine main body, and brush seals are provided to contact a predetermined position on the outer circumferential surface of a rotating shaft. As a result, contact of a sealing oil and the hydrogen gas, contact of a lubricating oil and the sealing oil in the bearing, and leakage of the hydrogen gas outside the machine are prevented.

The invention provides a piezoelectric excitation pulled silicon micro-resonant pressure sensor chip and a preparation method thereof. The pressure sensor chip mainly comprises a sealed glass cover, aresonator layer, a pressure sensitive film layer, a stress isolation pad, a piezoelectric excitation element and a resistance vibration pick-up element. A composite structure of a pressure sensitivediaphragm and a resonator is adopted. For a second sensitive mode, the resonator layer comprises a resonant beam and a torsion beam. An extension part at one end of two adjacent resonant beams is connected to the same suspended torsion beam, and the other end is connected to a mass block. A coupling beam is arranged in the middle of the mass block. The resonator is connected to an anchor point through a connection point. A pressure guide hole is formed in the stress isolation pad, and the pressure is delivered to the rectangular pressure sensitive diaphragm under the guidance of the pressure guide hole to cause deformation. The deformation is amplified by the anchor point, and delivered to the resonator layer. Piezoelectric actuators and resistive vibration pick-up elements are respectively arranged on the outer surface of the resonant beam and the coupling beam. The piezoelectric actuators and the resistive vibration pick-up elements are connected with an external circuit through leads respectively.

The invention discloses a vibration state control device and a vibration state control method thereof. The device comprises a digital processor, an isolator, a digital controller, a vibration driver, a vibration device, an acceleration sensor and a human-machine interface; the digital processor transmits a vibration control signal to the digital controller; the digital controller generates a drive signal and phase information thereof, and transmits the drive signal to the vibration driver; the vibration driver drives the vibration device to vibrate; the isolator is used for isolating strong and weak electricity of the digital processor and the digital controller; the acceleration sensor acquires an acceleration signal of the vibration device and inputs the acceleration signal to the digital processor; the digital controller transmits the phase information of the drive signal to the digital processor in a phase synchronous signal form; the digital processor performs phase discrimination on the two paths of input signals to obtain the vibration state of the vibration device; and when the working point of the vibration device is at the position of a resonance curve, the digital processor adjusts the vibration state and the working point of the vibration device. The device and the method have the advantage of efficiently and quickly controlling the vibration state.

An applicator for a circular arc-shaped solid composition comprises a housing defining a conduit that is sized to accept the circular arc-shaped solid composition stick. The conduit has a first end and a second end, the second end being open, and has a continuous circular arc-shape from the first end to the second end. The housing also contains one, or more than one opening for engaging a fastener. Each one of the one, or more than one opening is of a sufficient size to permit at least partial lateral movement of the fastener. Also included in the housing are an inlet and an outlet in communication with the conduit, the outlet being in communication with the second end, and a biasing assembly for advancing the circular arc-shaped solid composition stick within the conduit. The position of the applicator of the present invention relative to a surface to be treated can be easily adjusted by laterally sliding the housing of the applicator relative to its mounting bracket.

The invention discloses a longitudinal vibration motor-equipped electronic product which comprises a product outer shell and a longitudinal vibration motor, wherein the longitudinal vibration motor is fixed in the product outer shell; the longitudinal vibration motor comprises a shell body, a vibration block assembly, elastic sheets and a circuit assembly; the shell body has an accommodating chamber, the shell body and the accommodating chamber are shaped like a cuboid or have a structure similar to the cuboid, the vibration block assembly is arranged in the accommodating chamber, the vibration block assembly comprises a mass block and a magnet, each of upper and lower sides of the vibration block assembly is at least provided with at least one elastic sheet, the elastic sheets extend along a direction of a long axis of the vibration block assembly, the circuit assembly comprises a wire coil and an external circuit, and the wire coil is arranged on a side surface of the magnet; when the vibration block assembly is at an equilibrium position, the wire coil directly faces the magnet, upper and lower edges of the magnet correspond to a position of a cross section of the wire coil, the wire coil is connected with the external circuit, and the external circuit is electrically connected with the electronic product. The longitudinal vibration motor is configured in the product outer shell in such a way that the vibration block assembly is enabled to vibrate along a thickness direction of the electronic product.

The present invention provides a vibration transducer including a silicon single crystal vibration beam provided over a silicon single crystal substrate, the vibration beam having a sectional shape that is longer in a direction perpendicular to a surface of the silicon single crystal substrate than in a direction parallel with it, a shell made of silicon, surrounding the vibration beam with a gap, and forming a vacuum room together with the silicon single crystal substrate, a plate-like first electrode plate disposed parallel with the surface of the silicon single crystal substrate, the first electrode plate having one end connected to the vibration beam, plate-like second and third electrode plates disposed parallel with the surface of the silicon single crystal substrate so as to be opposed to each other with the vibration beam interposed in between, and asperities formed on confronting side surfaces of the vibration beam and the second and third electrode plates.

The present invention features a freestanding microfluidic pipette with both solution exchange capability and fluid re-circulation, enabling highly localized and contamination- free fluid delivery within a confined volume in the vicinity of the pipette exit. Preferably, the device features direct positioning, so the pipette can be directed at a point or object of interest, such as a biological or artificial cell, a defined surface area or a sensor element within an open volume, using micro- or nanopositioning techniques. One aspect of the invention provides a free-standing pipette. The free-standing pipette includes a microfluidic device comprising one or more channels with exits leading into an open-volume and a positioning device programmed to hold the microfluidic device at an angle from a horizontal axis.

The invention provides a horizontal-vibration linear motor of low magnetic leakage. The motor comprises a casing, a cover plate, a vibration assembly and a solenoid, vibration assembly is hung inside the mounting space by being positioned via elastic support pieces positioned on the two opposite inner walls of the casing, and when the solenoid is electrified, the vibration assembly vibrates in a reciprocating manner in the direction basically parallel with the bottom of the casing, and the two elastic support pieces are stretched and compressed. The vibration assembly comprises a mass bock connected with the elastic support pieces and permanent magnets mounted on the mass block. A magnetic blocking plate covers the mass block in a fit manner and further covers the permanent magnets, the material of the magnetic blocking plate is No.430 stainless steel, and the thickness of the magnetic blocking plate ranges from 0.2 to 0.5mm. According to the horizontal-vibration linear motor of low magnetic leakage, the magnetic field intensity at the outer side of the magnetic blocking plate is controlled below 500GS, components of a mobile phone or game machine at the outer side of the magnetic blocking plate are prevented from interference of the magnetic field, the production cost is reduced, and the linear motor is conducive to production scale enlargement of domestic enterprises.

The invention discloses a silicon micro-resonance pressure sensor based on electrostatic excitation piezoresistive detection. The sensor adopts a secondary sensitive structure compounded by a pressure sensitive film and a resonator, and the resonator is in-plane parallel reverse vibration. The resonator is connected with the pressure sensitive film through an anchor point, when external pressure acts on the pressure sensitive film and enables the pressure sensitive film to deform, the deformation is transmitted to the resonator through a silicon island on the pressure sensitive film and the anchor point, the internal stress of a resonant beam on the resonator is changed, and therefore the natural resonant frequency of the resonator is changed. A piezoresistor is arranged on the vibration pickup beam and used for completing pickup of resonant frequency, and then piezoresistive signal output is achieved through a first snakelike beam connected with the coupling beam.

A compact vibrator support structure has a very high "vibration confinement effect", and includes a vibrator, vibrator support members, and a vibrator base, which supports the vibrator in midair via the vibrator support members and is made of a material having a specific gravity of about 3.0 or above. Since the high vibration confinement effect of the vibrator support structure reduces leakage of vibration from the vibrator base, the stability of the vibration of the vibrator is greatly improved, thereby increasing the detecting accuracy of angular velocity. This eliminates the need to enlarge the vibrator base or to adhere a weight thereto, resulting in a miniaturized vibrating gyroscope.

The present invention discloses a linear vibration motor and electronic equipment. The vibration motor comprises a housing, a coil, a vibrator and an elastic element. The housing has a cavity, the coil and the elastic element are arranged in the cavity, the vibrator comprises a permanent magnet, the vibrator is suspended in the cavity through the elastic element, and the coil is matched with the vibrator; the permanent magnet is arranged relative to the inner wall of the housing along the direction of vibration, and magnetic fluid is provided between the permanent magnet and the inner wall, or the permanent magnet is arranged opposed to the elastic element along the direction of vibration, and magnetic fluid is provided between the permanent magnet and the elastic element; and the magnetic fluid is adsorbed on the permanent magnet. The linear vibration motor disclosed by the present invention has a good damping effect.

The invention discloses a crystal-coated COB (chip on board) light source with high luminous efficiency for a streetlamp and a production process for the crystal-coated COB light source. The COB light source comprises a red copper heat dissipation base plate, a lens, an aluminum oxide ceramic bracket and an inverted chip, wherein the inverted chip coats a solid crystal region of the aluminum oxide ceramic bracket through a eutectic furnace under the protection of a hydrogen gas atmosphere; the aluminum oxide ceramic bracket is fixed on a sunken table of the read copper heat dissipation base plate by adopting a reflux welding mode; the lens comprises an extending side part which is upwards turned over and an upwards bumped lens part in the shape of an oval hemispheric peanut; the lens is fixed on the red copper heat dissipation base plate through glue with high light transmittance, and the lens and the red copper heat dissipation base plate are enclosed to form a cavity; the aluminum oxide ceramic bracket which is coated with the inverted chip is fixed in the cavity, and a groove is positioned above a fluorescent powder region of the aluminum oxide ceramic bracket; and a gold-tin alloy with high heat conduction coats the bottom of the inverted chip. The production process for the crystal-coated COB light source with high luminous efficiency for the streetlamp is advanced and high in production efficiency; the obtained product has the advantages of high luminous efficiency, high light transmittance, good light gathering property, excellent heat dissipation, and the like.

The present invention relates to a new ring-plate type RV drive equipment. It includes machine body, central gear mounted on the input shaft, planetary gear mounted on the eccentric shaft and meshed with central gear, internal gear ring-plate mounted on the eccentric shaft, load-equalizing plate which is passed through internal gear ring-plate and connected by means of connecting shaft, output shaft plate and bearing. Its structure also includes an external gear fixedly-mounted on the front end plate of machine body; the described internal gear ring plate is meshed with said external gear.

The invention discloses a method for forming an MEMS structure, and the method comprises the steps: forming a first sacrificial layer and a supporting column protruding out of a substrate on the frontsurface of the substrate, and enabling the top surface of the first sacrificial layer to be flush with the top surface of the supporting column; forming a piezoelectric composite vibration layer above the support column and the first sacrificial layer; and removing the first sacrificial layer to form a cavity. According to the MEMS structure, the piezoelectric composite vibration layer is supported by the supporting columns, so that the sensitivity of the MEMS structure is improved.

A modified J-type cantilevered vane reduces rubbing of an airfoil and enhances the vibration stability of a vane hub and the fluidity of fluid. The cantilevered vane includes a root attachment inserted into a slot formed in an inner circumferential surface of a casing of a gas turbine, and an airfoil vertically extending from the root attachment to a predetermined height. The airfoil includes a linear part extending in a radial direction from the inner circumferential surface of the casing toward a rotating shaft of the gas turbine, and a curved part integrally formed with the linear part, the curved part including a bend beginning from one end of the linear part and curving in a circumferential direction of the rotating shaft. Overall, the linear part and the curved part are biased in the circumferential direction, since the airfoil has a J-shaped X-axis profile and a C-shaped Y-axis profile.

The invention provides a sounding device and electronic equipment with the same, and the sounding device comprises a first base body with a first through hole in the center, a vibration layer disposedabove the first base body, a connecting piece which is located in the first through hole and is connected with the vibration layer, and a driving device which drives the vibration layer to vibrate. The vibration layer comprises a fixing part which is positioned above the first base body and is fixed on the first base body, a vibrating diaphragm which is suspended above the first through hole, andan elastic connecting component which is connected with the vibrating diaphragm and the fixing part; the elastic connecting component comprises a connecting part used for connecting the vibrating diaphragm and an elastic part capable of moving along the central axis direction of the vibrating diaphragm, one end of the connecting part is connected with the vibrating diaphragm, the other end of theconnecting part is connected with the elastic part, the elastic part is connected with the fixed part, and the elastic part is located above the first base body; the first base body is provided witha receding groove matching the elastic part. According to the invention, the problems of unstable vibration and insufficient full frequency domain of the vibrating diaphragm in the prior art are effectively solved.

The invention relates to the field of flow detection and discloses a humanoid intelligent control method for vibration amplitude of a Coriolis mass flowmeter. The humanoid intelligent control method for the vibration amplitude of the Coriolis mass flowmeter comprises the following steps: dividing the vibration of a measuring tube of the Coriolis mass flowmeter into a vibration starting and amplitude stabilizing stage and an interference suppression stage, and dividing vibration starting and amplitude stabilizing vibration into 5 characteristic states and interference suppression vibration into 3 characteristic states according to errors of the vibration amplitude and given amplitude and an error variation trend; constructing 8 corresponding control modes by imitating the control experience of human by aiming at 8 different characteristic states; selecting the corresponding control mode by applying intuitional reasoning according to the current characteristic state of the vibration of the current measuring tube, and outputting amplitude gain. The humanoid intelligent control method disclosed by the invention has the beneficial effects that the vibration-starting speed and the response speed of the Coriolis mass flowmeter are effectively increased, and the vibration stability is enhanced.

The embodiment of the invention discloses a chip-on-board (COB) light source of a flip chip mining lamp. The COB light source of the flip chip mining lamp comprises a cooling copper substrate, an aluminum nitride ceramic bracket and an optical glass lens, wherein the cooling copper substrate comprises a sink table structure, a through hole structure and a copper foil line; the aluminum nitride ceramic bracket comprises a bracket body which is made of aluminum nitride ceramic; a plurality of solid crystal regions are evenly arranged on one surface of the bracket body; and the optical glass lens is adhered right above a chip packaging block on the cooling copper substrate, so that the problem in a light-emitting diode (LED) light source produced by a flip chip technology is avoided; crystal fixing is realized by welding; a bonding wire is not needed; and a eutectic bracket is connected with a cooling substrate in a reflow soldering manner, so that the anti-vibration stability is very good.

A cantilevered vane, for use with a rotary disc of a gas turbine, includes a root supported in a dovetail slot formed in a circumferential surface of the rotary disc; and an airfoil protruding a predetermined height from the root and having a J-shaped cross-section throughout a front-wing portion and a rear-wing portion of the airfoil. The airfoil includes a straight portion vertically extending upward from the root by a predetermined height; and a curved portion integrally formed with an upper end of the straight portion to cantilever toward one side of the airfoil, the curved portion being inclined at a predetermined angle with respect to the straight portion. Cooling fluid flows through a first channel formed in the straight portion and a second channel formed in the curved portion. The first channel includes front-wing and rear-wing channels for guiding the cooling fluid to the front-wing and rear-wing portions.

A multifunction apparatus, comprising an outer housing and a vibration system, a magnetic circuit system and an elastic supporting member. The magnetic circuit system is fixed by the elastic supporting member and is suspended inside the outer housing. The vibration circuit system comprises a diaphragm and a voice coil. The elastic support member comprises a first fixing portion and a second fixing portion having different heights, and a deformation portion connected with the first fixing portion and the second fixing portion. An orthographic projection of the elastic supporting member in a vibration direction is a polygon or an oval shape. The first fixing portion or the second fixing portion is located at an edge of the elastic supporting member, and four straight edges of the first fixing portion or the second fixing portion are disposed corresponding to a rectangular bottom wall of the magnetic circuit system or the outer housing. The elastic supporting member of the invention does not occupy a horizontal space of the magnetic circuit system, and thus a magnet with large size can be accommodated, and a BL value of a vibrating sound-producing apparatus can be increased; further, since the elastic supporting member is a three-dimensional structure, the length and width of the deformation portion is not limited, facilitating adjustment of an F0 value of the vibrating sound-producing apparatus.

The invention relates to a double-sided miniature sound production device and an electronic product. The double-sided miniature sound production device comprises a first vibration assembly, and the first vibration assembly comprises a first vibrating diaphragm, a first voice coil and a first centering support chip, wherein the first vibrating diaphragm is provided with a first folding ring, the first centering support chip is provided with a first cantilever, and the first centering support chip is connected to the surface of one side of the first vibrating diaphragm. The device also comprisesa second vibration assembly which comprises a second vibrating diaphragm, a second voice coil and a second centering support chip, wherein the second vibrating diaphragm is provided with a second folding ring, the second centering support chip is provided with a second cantilever, and the second centering support chip is connected to the surface of one side of the second vibrating diaphragm; a magnetic circuit system, wherein the first vibration assembly and the second vibration assembly are arranged on the upper side and the lower side of the magnetic circuit system respectively, and the first voice coil and the second voice coil extend into the magnetic gap.

The invention relates to the field of flow detection and discloses a humanoid intelligent control method for vibration amplitude of a Coriolis mass flowmeter. The humanoid intelligent control method for the vibration amplitude of the Coriolis mass flowmeter comprises the following steps: dividing the vibration of a measuring tube of the Coriolis mass flowmeter into a vibration starting and amplitude stabilizing stage and an interference suppression stage, and dividing vibration starting and amplitude stabilizing vibration into 5 characteristic states and interference suppression vibration into 3 characteristic states according to errors of the vibration amplitude and given amplitude and an error variation trend; constructing 8 corresponding control modes by imitating the control experience of human by aiming at 8 different characteristic states; selecting the corresponding control mode by applying intuitional reasoning according to the current characteristic state of the vibration of the current measuring tube, and outputting amplitude gain. The humanoid intelligent control method disclosed by the invention has the beneficial effects that the vibration-starting speed and the response speed of the Coriolis mass flowmeter are effectively increased, and the vibration stability is enhanced.

The invention discloses an MEMS structure, which comprises a substrate having a cavity and a pillar located in the cavity; a piezoelectric composite vibration layer which is formed over the cavity, the first end of the supporting column is connected with the substrate, and the second end of the supporting column supports the piezoelectric composite vibration layer. According to the MEMS structure,the piezoelectric composite vibration layer is supported by the supporting columns, so that the sensitivity of the MEMS structure is improved.