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48 results about "Wobble frequency" patented technology
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Optical discs, with the exception of the DVD-RAM, have their data encoded on a single spiral, or a groove, which covers the surface of the disc. In the case of recordable media, this spiral contains a slight sinusoidal deviation from a perfect spiral. The period of this sine curve corresponds to the wobble frequency. The wobble frequency is commonly used as a synchronization source to achieve constant linear velocity while writing a disc, but has other uses as well depending on the type of disc. The frequencies quoted all assume that the disc is being written at the '1x' speed. The frequencies are appropriately higher for faster writing speeds.
Portable communication device and incoming call notification control method thereof
InactiveCN101800796AControl volumeReduced strengthCalling susbscriber number recording/indicationAutomatic controlExercise state
The invention relates to a portable communication device and an incoming call notification control method thereof. The portable communication device comprises a machine body, a sensing unit, a ringing unit and a processing unit, wherein the machine body is provided with a machine body surface; the sensing unit is arranged in the machine body and is used for detecting whether the machine body surface faces a preset direction actually or not and detecting the wobbled frequency and amplitude of the machine body; the ringing unit is used for ringing; and the processing unit is used for controlling the ringing unit to ring when the portable communication device receives an incoming call signal and controlling the volume of the ring according to whether the machine body surface faces the preset direction actually or not and the wobbled frequency and amplitude of the machine body. The incoming call notification control method is used for controlling the portable communication device and comprises the following steps: detecting the wobbled frequency and amplitude of the machine body; detecting whether the machine body surface faces the preset direction actually or not; and controlling the volume of the ring according to whether the machine body surface faces the preset direction actually or not and the wobbled frequency and amplitude of the machine body. The portable communication device automatically senses the motion state thereof and automatically controls an incoming call notification mode according to the motion state.
Owner:INVENTEC APPLIANCES CORP
Wobble signal detecting circuit for optical disk device and wobble signal detecting method
A wobble signal detecting circuit for an optical disk reproducing device configured to reproduce an optical disk which has a track including a snaking portion at a specific period, including an optical detecting unit which detects a signal written on the track, first and second band-pass filters which have different pass bandwidths and extract respectively a first and second wobble frequency components of the snaking portion based on outputs from the optical detecting unit, and a wobble signal determining unit determines that a wobble signal is present if a frequency difference or a frequency ratio of the first and second wobble frequency components is equal to or less than a prescribed value. Preferably, a higher frequency side shoulder of a bandwidth of the first band-pass filter and a lower frequency side shoulder of a bandwidth of the second band-pass filter are located on a wobble frequency.
Owner:FUNAI ELECTRIC CO LTD
Jewel adornment
The invention relates to a jewel adornment comprising an inlaying seat, a jewel and a base seat, wherein the jewel and the base seat are inlayed on the inlaying seat; shaft rods are respectively arranged at both sides of the inlaying seat; support parts with outer edges in the shape of an arc notch is arranged on the shaft rods, and the thicknesses of the support parts are progressively reduced from root parts to outer edge positions; supporting holes are respectively arranged at both sides of the base seat, the walls of the supporting holes are inwards protruded along a radial direction to form supporting parts with outer edges in the shape of the arc notch, and the thicknesses of the supporting parts are progressively reduced from the root parts to the outer edge positions; the shaft rods penetrate through the corresponding supporting holes; the support parts are movably hung on the corresponding supporting parts positioned on the base seat; and the outer edges of the supporting parts support the outer edges of the corresponding support parts. In the invention, the shaft rods provided with the support parts in the shape of the arc notch and the supporting holes provided with the supporting parts in the shape of the arc notch are convenient to process and assemble, small contact surfaces are positioned between the supporting parts and the support parts, the inlaying seat and the jewel can together wobble for a long time due to externally slight wobble, and wobbling frequency and wobbling amplitude can be controlled within an effective observing range of a human eye through a weight balancing block, and therefore, the color flashing effect can be better showed.
Owner:马国明 +1
Multifunctional crib
The invention discloses a multifunctional crib, which relates to the technical field of cribs, and solves the technical problems that the existing cribs do not have a cradle device for promoting the sleep of infants and adjusts the swing frequency of the cradle according to the sleeping conditions of babies. The bed body, the upper surface of the bed frame and the lower surface of the bed body are connected by hinges, the upper surface of the bed frame is provided with a cam, the cam and the upper surface of the bed frame are rotatably connected by transmission shafts and bearings, the lower surface of the bed body is provided with a roller bracket, the side of the bed body Equipped with a controller, the present invention is a multifunctional crib, which has the advantages of simple structure and a cradle soothing device for babies.
Owner:弘毅天承知识产权股份有限公司
Jewel adornment
ActiveCN102697259AColor flash effect is goodEasy to processJewelleryEngineeringMechanical engineering
The invention relates to a jewel adornment comprising an inlaying seat, a base frame and a jewel, wherein the jewel is arranged on the inlaying seat; shaft rods are respectively arranged at both sides of the inlaying seat; support parts with outer edges in the shape of an arc notch is arranged on the shaft rods, and the thicknesses of the support parts are progressively reduced from root parts to outer edge positions; supporting grooves which are provided with openings at one sides to be in semi-closed shapes are respectively arranged at both sides of the base frame; the bottom walls of the supporting grooves are inwards protruded to form supporting parts with outer edges in the shape of the arc notch, and the thicknesses of the supporting parts are progressively reduced from the root parts to the outer edge positions; the support parts of the shaft rods are arranged in the supporting grooves through the openings of the supporting grooves, and the support parts are movably hung on the supporting parts positioned on the base frame; and the outer edges of the supporting parts support the outer edges of the corresponding support parts. In the invention, the shaft rods provided with the support parts in the shape of the arc notch and the supporting grooves provided with the supporting parts in the shape of the arc notch are convenient to process and assemble, small contact surfaces are positioned between the supporting parts and the support parts, the inlaying seat and the jewel can together wobble for a long time due to externally slight wobble, and wobbling frequency and wobbling amplitude can be controlled within an effective observing range of a human eye through a weight balancing block, and therefore, good color flashing is achieved.
Owner:马国明 +1
System for making a photoresist master for a hybrid optical recording disc
InactiveUS7120097B1Television system detailsFilamentary/web record carriersResistIntensity modulation
A laser beam recording system for exposing a photoresist master disc having a photoresist layer formed over a substrate for making a hybrid optical recording disc having a read only (ROM) portion and a writable portion, including a first optical modulator for modulating an intensity of a first laser beam having a wavelength selected to provide activating radiation to expose a pattern in the photoresist layer formed over the substrate of the master disc between a lower intensity for exposing a groove in the photoresist layer and a higher intensity for exposing the groove and a pattern of depressions in the groove in the photoresist layer; and a second optical modulator for frequency-modulating an intensity-modulated second laser beam with a wobble-frequency to cause the exposed groove to be a continuously frequency-modulated groove. The recording system also includes a laser beam modulation control system for controlling the operation of the first and second optical modulators to form a continuously frequency-modulated exposed groove with exposed depressions in the ROM portion of the exposed groove. The first and the second laser beams can be provided by one laser as a single laser beam, by one laser as two split laser beams, and by a first and a second laser.
Owner:EASTMAN KODAK CO
Environment-friendly water circulation use spinning machine
The invention discloses an environment-friendly water recycling textile machine, which comprises a device body. Two symmetrical feeding ports are opened on the top of the device body, and a first motor is fixedly connected to the middle part of the top of the device body. The output shaft of the first motor is fixedly connected with a transmission shaft, and the end of the transmission shaft away from the first motor penetrates and extends to the inside of the device body. The environmentally friendly water recycling textile machine can drive the roller brush to rotate under the action of the first motor, and through the cooperation with the brush, it can effectively clean the textiles, and the brush and the roller brush can adhere to the textiles. The flocs and dust are cleaned to ensure that the textiles are cleaned more cleanly. Under the action of the second motor, the disc can be rotated, and the water inside the equipment body can be reversed by the roller brush through the fan blades. The direction rotation can increase the oscillation frequency of the water and achieve a more effective cleaning effect.
Owner:新昌县城关升华机械厂
Recommended method and device, and computer-readable storage medium
ActiveCN109445617ASocial circle expansionData processing applicationsDigital data information retrievalSimulationComputer terminal
The invention discloses a recommendation method, which comprises the following steps of when a second terminal is detected in a preset position range of a moving first terminal, monitoring whether a user using the second terminal performs a specific shaking operation or not; acquiring a wobble frequency corresponding to the specific wobble operation performed by the second terminal when the user using the second terminal performs the specific wobble operation is monitored; matching the sloshing frequency with the step frequency of a user using the first terminal to obtain a matching result; sending motion-related information of a user using the second terminal to the first terminal to recommend the user using the second terminal to the user using the first terminal when the matching resultindicates that the wobble frequency matches the step frequency; using the motion related information for the user using the first terminal to determine whether the user using the second terminal is to be a jog object.
Owner:MIGU INTERACTIVE ENTERTAINMENT CO LTD +2
Jewel adornment
ActiveCN102697260BColor flash effect is goodEasy to processJewelleryEngineeringMechanical engineering
The invention relates to a jewel adornment comprising an inlaying seat, a jewel and a base seat, wherein the jewel and the base seat are inlayed on the inlaying seat; shaft rods are respectively arranged at both sides of the inlaying seat; support parts with outer edges in the shape of an arc notch is arranged on the shaft rods, and the thicknesses of the support parts are progressively reduced from root parts to outer edge positions; supporting holes are respectively arranged at both sides of the base seat, the walls of the supporting holes are inwards protruded along a radial direction to form supporting parts with outer edges in the shape of the arc notch, and the thicknesses of the supporting parts are progressively reduced from the root parts to the outer edge positions; the shaft rods penetrate through the corresponding supporting holes; the support parts are movably hung on the corresponding supporting parts positioned on the base seat; and the outer edges of the supporting parts support the outer edges of the corresponding support parts. In the invention, the shaft rods provided with the support parts in the shape of the arc notch and the supporting holes provided with the supporting parts in the shape of the arc notch are convenient to process and assemble, small contact surfaces are positioned between the supporting parts and the support parts, the inlaying seat and the jewel can together wobble for a long time due to externally slight wobble, and wobbling frequency and wobbling amplitude can be controlled within an effective observing range of a human eye through a weight balancing block, and therefore, the color flashing effect can be better showed.
Owner:马国明 +1
Center torsion bar type object mass center and rotational inertia measuring mechanism based on the knife edge support
PendingCN109163845AImprove stabilityHigh precisionStatic/dynamic balance measurementMoment of inertiaEngineering
The invention discloses a center torsion bar type object mass center and rotational inertia measuring mechanism based on knife edge support. A problem is solved by a method of giving two functions through a center shaft, and the shaft is a reference shaft system for measuring the mass center rotation, and a swing torsion bar used for measuring the rotational inertia. According to the mechanism, atraditional design concept is broken through in the three aspects, firstly, the rigidity of the torsion bar should not be too large, otherwise an initial angle with a certain value is difficult to twist, and when the swing angle is large, the swing is stable, and the periodic measurement is facilitated; secondly, the rigidity is too large, the swing frequency is fast, and the swing period is difficult to measure; and thirdly, the rigidity of a rotating shaft for measuring the mass center should be large, a corner of the shaft system cannot be caused by a driving friction moment, and otherwisethe rotating shaft cannot stop immediately when the rotation is stopped and can swing in a reciprocating mode.
Owner:ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
Long-fin torsional wave-propelled bionic underwater vehicle and motion mode thereof
ActiveCN108146600ASimple structureEasy to useUnderwater vesselsUnderwater equipmentSagittal planeMarine engineering
The invention relates to a long-fin torsional wave-propelled bionic underwater vehicle. The long-fin torsional wave-propelled bionic underwater vehicle comprises a main body; undulating fin structuresfor realizing undulation motions are symmetrically placed on the two sides of the main body; the swinging frequency, swinging amplitude, mid-sagittal plane position and wave number of each undulatingfin structure are controlled by a motion control system; and a tail fin structure is also arranged at the tail part of the main body. The long-fin torsional wave-propelled bionic underwater vehicle has the advantages of simple structure and convenient use. According to the long-fin torsional wave-propelled bionic underwater vehicle, lateral translational motion at a zero speed or a very-load speed, power rising and submerging motions in vertical zones, rollover motion at a zero speed or a very-load speed, pitching motion at a zero speed or a very-load speed, and horizontal plane rotational motion at a zero speed or a very-load speed are realized by using a motion of moving by using the undulating fin structures on the two sides of the main body; and the special maneuvering characteristicscan be realized by using differential motion between the undulating fin structures.
Owner:CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
Apparatus and method for determining type of an optical disk
InactiveUS7724615B2Combination recordingRecord information storageBandpass filteringCenter frequency
Owner:LITE ON IT
Controllable pitch propeller unidirectional locking arrangement
InactiveCN101397052AEliminate the danger of overloadingReduce wearPropulsive elementsPropellerDistributor
A one-way locking device for a controllable pitch propeller mainly solves the technical problems of lowering the swinging frequency of the pitch angle under the aheading condition and the like. The technical proposal adopted is as follows: a check valve is arranged between the front side of an ahead oil hole which is connected with a double oil hole tube of an ahead cavity of an oil cylinder and the rear side of an ahead oil distributing groove of an oil distributor sleeve gasket, the check valve is arranged in the valve body, the rear end of the valve body is fixedly connected with an oil distributing stub, and the valve body is internally provided with a control piston for controlling the check valve. The device is applicable to various types of controllable pitch propellers which are arranged at a head end oil distributor of a gear box and have the design pitch angle not more than 30 degrees.
Owner:704TH RES INST OF CHINA SHIPBUILDING IND CORP
Information recording system and an information recording method
InactiveUS20090003148A1Suppress noise signalAccurate recordCombination recordingModification of read/write signalsPush pullNoise reduction
An information recording system for recording information on an optical disc using a reference clock signal generated based on a push-pull signal including a wobble frequency component, the system includes an amplitude obtaining unit for obtaining an amplitude value of the push-pull signal, a threshold calculation unit for calculating a displacement threshold of the push-pull signal based on the amplitude value obtained by the amplitude obtaining unit, and a noise reduction unit for generating a corrected push-pull signal by correcting the push-pull signal such that a displacement exceeding the displacement threshold is reduced. The reference clock signal is generated based on the corrected push-pull signal generated by the noise reduction unit.
Owner:PANASONIC SEMICON SOLUTIONS CO LTD
Method and device for canceling a land-groove offset component of a focusing error signal in an optical storage system
InactiveUS20050185538A1Overcomes drawbackCombination recordingOptical beam sourcesEngineeringOptical storage
Owner:MEDIATEK INC
Optical disc apparatus, clock signal generation method, program, and control apparatus
InactiveCN1627380AHigh gainImprove access performancePulse automatic controlRecord information storageSignal modulationWobble frequency
The present invention provides an optical disc device comprising: a signal detection section for detecting a wobble signal from a reproduced signal of an optical disc; and a generation section for generating a clock signal synchronized with the wobble signal. The generation section includes: a first difference signal generation section for generating a first difference signal representing a difference between a frequency of the wobble signal and a frequency of the clock signal; a period detection section for a difference signal detecting a modulation period of said wobble signal; and an adjustment section for adjusting the frequency of said clock signal based on a predetermined signal other than said first difference signal during a modulation period, and The frequency of the clock signal is adjusted according to the first difference signal during one period.
Owner:PANASONIC CORP
Vertical double-swing-shaft four-disc-cam four-oscillating-bar knuckle bearing high-speed testing machine
InactiveCN103383307AMeet the requirements of fatigue testReduce frictionMachine bearings testingAviationRolling resistance
The invention discloses a vertical double-swing-shaft four-disc-cam four-oscillating-bar knuckle bearing high-speed testing machine. The end portions of high-speed rotation shafts I and II are fixedly connected with transmission gears I and II respectively, the high-speed rotation shafts I and II are fixedly provided with working cams I and III, balance cams I and III, working cams II and IV and balance cams II and IV respectively, one end of a high-frequency swing shaft I and one end of a high-frequency swing shaft II are fixedly connected with inner rings of testing knuckle bearings I and II, the other end of the high-frequency swing shaft I and the other end of the high-frequency swing shaft II are fixedly connected with two pairs of swing rods I, II, III and IV, and outer spherical surface abrasion-resisting sleeves I, II, III and IV on bearings of the two pairs of swing rods I, II, III and IV are tangent with the working cams I, II, III and IV. The high-speed rotation shafts, the working cams and the balance cams fixedly connected onto the high-speed rotation shafts form a dynamic balance structure, the working cams and the outer spherical surface abrasion-resisting sleeves in contact with the working cams form rolling friction, and the vertical double-swing-shaft four-disc-cam four-oscillating-bar knuckle bearing high-speed testing machine is small in friction force, low in abrasion degree and low in noise. The swing frequency of the machine can reach to 70-80 Hz and can meet the requirement for a high-frequency swing aviation knuckle bearing fatigue test.
Owner:YANSHAN UNIV
Sound wave toothbrush and its rotation axle electric machine
ActiveCN100531682CAdjust the swing frequencyIncrease dampingBrush bodiesTooth cleaningLow noiseBristle
Owner:OASIS GLOBAL
Apparatus and method for determining type of an optical disk
InactiveUS20070053253A1Combination recordingRecord information storageBandpass filteringCenter frequency
An apparatus and a method for determining the type of an optical disk are provided. Firstly, an RF signal of the optical disk in an optical disk drive is read out. Next, a bandpass signal is extracted from the RF signal by a bandpass filter whose central frequency is a wobble frequency. Then, whether the bandpass signal corresponds to a wobble signal is determined. If so, the optical disk is a recordable optical disk; otherwise, the optical disk is a read-only optical disk.
Owner:LITE ON IT
Shake-up device
PendingCN107870115APromote shakingShake fastPreparing sample for investigationElastic componentShake up
The invention relates to a shake-up device for uniform mixing of reactants. The shake-up device comprises lifting mechanisms, shake-up mechanisms and container positioning mechanisms, wherein each shake-up mechanism is provided with an elastic assembly for jacking up a reactant container, an eccentric shaft assembly for pushing the reactant container to swing back and forth as well as a shake-up photoelectric sensing assembly for detecting the rotating state of the eccentric shaft assembly. The eccentric shaft assemblies are arranged beside the reactant containers to drive the reactant containers to swing back and forth, so that the shake-up effect of the reactants is better; the shake-up photoelectric sensing assemblies can feed back frequency for swing of the reactant containers, and theswing speed can be controlled and adjusted according to demands of different reactants; a zero-position detection assembly is added to each lifting mechanism, lifting height is controlled through a synchronous pulley group and can be set according to different heights of different models of the reactant containers, so that the shake-up device can be applied to shake-up operation of various modelsof the reactant containers and is wide in application range, and the cost is saved.
Owner:苏州立禾生物医学工程有限公司
Intelligent robot dolphin
InactiveCN100519331CRealize complex movementsGood technical displayPropulsive elements of non-rotary typeUnderwater vesselsEngineeringHuman–robot interaction
The invention relates to an intelligent machine dolphin, which is characterized in that it comprises a rigid dolphin head, an aluminum skeleton arranged inside the dolphin head, a power supply device, a control device, a sensing device and Counterweight; elastic dolphin body composed of turning mechanism, dorsal-ventral propulsion mechanism and elastic soft body, and imitation fin device composed of flipper mechanism, dorsal fin mechanism and tail fin. The present invention can successfully simulate the two degrees of freedom of a typical dolphin multi-joint swing propulsion up and down and swing left and right through the control of each DC servo motor, and can also adjust the swing frequency and swing amplitude. On the one hand, the invention provides an experimental platform for studying the hydrodynamics, swimming mechanism, drag reduction mechanism and motion control method of dolphins; Human-computer interaction robot dolphins can be produced for entertainment or viewing.
Owner:PEKING UNIV
Appliance for recording or playing back information having means for detecting or moving the scanning location
InactiveCN1315121CSignal processing for reducing noiseInformation arrangementScannerBand-pass filter
Owner:THOMSON LICENSING SA
Mechanical timer travel-time system of balance wheel escape pinion coordinating series
InactiveCN1776862AImprove the level of production technologyImprove market adaptabilityTime-programme switchesTime interval measurement with driving mechanismFrequency conversionEngineering
Frequency conversion inseries balance wheel or balance wheel-hairspring module in balance wheel frequency conversion series, and escape wheel in variable teeth series or end wheel in variable teeth series of escape wheel is adopted in system of traveltime. Under precondition of not changing integral structure of system and relevant technical data, changing turned accumulative teeth / number of time in whole course of the escape wheel by altered number of teeth of the escape wheel, and changing oscillation frequency of balance wheel-hairspring module by altered inertia of balance wheel. Advantages are: enriching production specifications, and shortening production cycle.
Owner:徐国林
Mechanical timer travel-time system of balance gear-cover coordinating series
InactiveCN1776870AImprove the level of production technologyImprove market adaptabilityTime-programme switchesTime interval measurement with driving mechanismGear wheelFrequency conversion
Frequency conversion inseries hairspring or balance wheel-hairspring module in hairspring frequency conversion series, and cap teeth unit in variable teeth series is adopted in system of traveltime. Under precondition of not changing integral structure of system and relevant technical data, changing actual number of teeth and round rotation angle position of head sheave by altered number of teeth of the cap teeth clip, and changing oscillation frequency of balance wheel-hairspring module by altered length or rigidity of hairspring form basic timing quantity of mechanical timer in mutual cooperation series of hairspring and cap teeth unit. Advantages are: enriching production specifications, and shortening production cycle.
Owner:徐国林
Foldable and swinging salt pond ballast machine
The invention relates to a special live ballast machine for salt ponds, which is composed of double rows of rake bodies, and is used for live ballast operation on crystallized salt layers by tractor traction. There are two cams installed on the main shaft of the live ballast machine, and each cam drives two driven bodies, and each driven body is fixedly connected to a rake body, and the two rake bodies are arranged in parallel and side by side. Bearing support can realize reciprocating swing, and the swing frequency can be manually adjusted by the operator, which reduces the working resistance of live ballast, makes the work of live ballast on crystallized salt layer more thorough and uniform, and improves the efficiency of live ballast. At the same time, the two ends of the rake body mechanism of the live ballast machine can be folded towards the middle, which greatly reduces the volume and is convenient for driving and transportation outside the salt pond.
Owner:TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
Appliance for recording or playing back information having means for detecting or moving the scanning location
InactiveCN1592925ASignal processing for reducing noiseInformation arrangementBandpass filteringComputer science
The invention proposes an appliance for recording or playing back information having means for detecting or moving the position of a scanning device over a disc with a wobble track, said appliance being able to be used both in recorded and in unrecorded areas of the disc and hence being able to be used both for write-once and for rewriteable recording media with a wobble track, and said appliance additionally permitting fast determination of the scanning location without decoding of scanned-location information which is contained in the wobble track. According to the invention, a wobble signal is scanned from the wobble track on the disc using a scanning device, and a wobble frequency contained in the wobble signal detected from the disc is used for detecting or moving the position of the scanning device. In this regard, the wobble frequency is related to the number of revolutions or the rotation speed of the disc or to a wobble frequency known for a reference location on the disc, which allows the position of the scanning device to be detected or moved without decoding of scanning-location information which is contained in the wobble signal. To generate the wobble frequency contained in the wobble signal, a circuit block is provided which contains a phase comparator, a bandpass filter, a voltage-controlled multivibrator and a digital phase shifter and is used to generate a wobble-frequency signal.
Owner:THOMSON LICENSING SA
Optical-information reproducing system
InactiveCN101359488AImprove tracking performanceIncrease gain marginInformation arrangementRecord information storageOptical pickupResonance
An optical-information reproducing system is provided, in which the tracking capability of an optical pickup can be increased, and in which the number of occurrences in which the optical pickup fails to track a groove can be reduced, by increasing a gain margin and by ensuring the gain margin. In the optical-information reproducing system, an optical-information recording medium 150 is rotated at a fixed linear velocity of about 3.49 m / s, and the optical pickup 110 is caused to track the groove 152 to irradiate the groove with laser light, whereby information recorded on the optical-information recording medium can be reproduced. A higher-order resonance frequency of the optical pickup that is generated when the optical pickup 110 is caused to track the groove 152 can be made lower than a wobble frequency that is reproduced using the groove 152 without performing rotation control on the optical-information recording medium 150.
Owner:TAIYO YUDEN KK
Wobble frequency control device of elasticizer groove drum frequency converter
InactiveCN102436194APrecise control of frequency changesStable controlProgramme controlComputer controlCommunication interfaceFrequency changer
The invention mainly discloses a wobble frequency control device of an elasticizer groove drum frequency converter. The control device comprises a micro programming chip, a communication interface, an intermediate relay and a groove drum frequency converter, wherein the micro programming chip is connected with the groove drum frequency converter through the communication interface, and the micro programming chip is connected with the groove drum frequency converter simultaneously through the intermediate relay; and the micro programming chip sends a signal to a coil of the intermediate relay so as to control the working condition of a contact of the intermediate relay. The micro programming chip as an upper computer and a frequency converter perform data exchange uninterruptedly, and the frequency converter can operate according to requirements; the control device provided by the invention has strong anti-interference capability, and can rapidly finish complicated frequency change.
Owner:ZHEJIANG YUEJIAN INTELLIGENT EQUIP CO LTD
Programmable logic controller with wobble frequency function and method thereof
ActiveCN102540957BProgramme control in sequence/logic controllersFrequency changerProgrammable logic controller
Owner:DELTA ELECTRONICS (SHANGHAI) CO LTD +2
Optical information reproducing system
InactiveUS20090034406A1Lower resonance frequencyReduce in quantityRecord information storageOptical record carriersOptical pickupResonance
An optical-information reproducing system is provided, in which the tracking capability of an optical pickup can be increased, and in which the number of occurrences in which the optical pickup fails to track a groove can be reduced, by increasing a gain margin and by ensuring the gain margin. In the optical-information reproducing system, an optical-information recording medium is rotated at a fixed linear velocity of about 3.49 m / s, and the optical pickup is caused to track the groove to irradiate the groove with laser light, whereby information recorded on the optical-information recording medium can be reproduced. A higher-order resonance frequency of the optical pickup that is generated when the optical pickup is caused to track the groove can be made lower than a wobble frequency that is reproduced using the groove without performing rotation control on the optical-information recording medium.
Owner:TAIYO YUDEN KK
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