353results about How to "Change frequency" patented technology

Systems and methods according to the invention employ an acceleration sensor to characterize the synchrony or dyssynchrony of the left ventricle. Patterns of acceleration related to myocardial contraction can be used to assess synchrony or dyssynchrony. Time-frequency transforms and coherence are derived from the acceleration. Information and numerical indices determined from the acceleration time frequency transforms and coherence can be used to find the optimal pacing location for cardiac resynchronization therapy. Similarly, the information can be used to optimize timing intervals including V to V and A to V timing.

A lens driving device is provided, including: a cover member; a bobbin installed with at least one lens and having a coil unit arranged on an outer circumferential surface of the bobbin; a magnet arranged at a positon corresponding to that of the coil unit; first and second elastic members, where one end of each of the first and second elastic members may be respectively coupled to an upper surface and a lower surface of the bobbin and supporting movement of the bobbin in an optical axis direction; a detection unit configured to detect movement of the bobbin in a direction parallel to the optical axis direction; a damping member arranged at a connecting portion between the bobbin and the first elastic member; and a support unit provided at at least one of the bobbin and the first elastic member and maintaining an arranged position of the damping member.

An electronic component mounting method for placing electronic components successively to component placing positions on a board by component holding devices equipped with a plurality of removable suction nozzles which is operable to hold the electronic components. The method, as an example of its various manners, includes: in placing the electronic components onto a multiple board composed of a plurality of sub-boards, applying a placement step to all the sub-boards, the placement step being a step of placing onto the board all of electronic components that are holdable by an identical suction nozzle; and after completion of the placement step, changing the suction nozzle to another and moving to a next placement step, whereby electronic-component mounting for the individual sub-boards is carried out. In another aspect, component array intervals (M) of component feed sections or intervals (N) of component placing positions on the board are made coincident with array intervals (L) of the component holding devices.

The invention provides a sequential control signal generation method of a cold ion quantum information processor. Radio frequency signal and digital signal parameters are set through a principal computer command on a principal computer; the principal computer command is converted into a machine command which is transmitted to a sequential control FPGA; the sequential control FPGA executes the machine command and digital signals and radio frequency signals are output through a conversion module and a radio frequency synthesis module. The invention also provides a sequential control signal generation device of a cold ion quantum information processor. The device comprises a principal computer, a sequential control module, a radio frequency synthesis module and a conversion module. According to the invention, sequential control signals for experiments are described intuitively; programmed principal computer commands can be used repeatedly, so that repeated work is prevented and improvement can be made according to experiment results conveniently; the parameters such as the frequency, the phase and the amplitude of radio frequency signals can be changed conveniently; multiple paths of control signals can be controlled accurately to work cooperatively; the extendibility is great.

A handheld device is disclosed, which includes an appearance part, a system ground plane and a detachable element. The detachable element includes a carrier and a planar antenna. The system ground plane is disposed in the appearance part and has a feed point. The planar antenna is disposed on the carrier and has a connection point. The carrier is detachably connected to the appearance part. When the carrier is connected to the appearance part, the above-mentioned connection point is electrically connected to the feed point. In this way, the radiation performance of the antenna can be improved and the frequency band of the antenna of the handheld device can be changed by replacing the detachable element.

Methods and systems are disclosed that characterize cardiac function using an acceleration sensor to acquire and analyze the frequency dynamics associated with the isovolumic contraction phase (“ICP”). This information can be used to characterize heart function; optimize therapy for cardiomyopathy, including CRT therapy (including pacing intervals and required pharmacologic therapy); and to optimize CCM therapy. In addition, this information can be used to identify target pacing regions for CRT lead placement. Further, analyzing the frequency dynamics can be used to characterize pathologic heart vibrational motion, such as mitral regurgitation and the third or fourth heart sound, and the response of this motion to therapy for cardiomyopathy.

The present invention provides a liquid crystal display controller device and method which provides for a full and/or partial display with good display quality and/or low power consumption based on the scanning period for an active scan line being dependent upon a number of reference clock pulses. Some embodiments of the present invention include one or more of the following features: keeping the frequency substantially constant for different numbers of active scan lines, allowing change of the frequency due to characteristics of the LCD, displaying gradation with near linear effective voltage characteristics, displaying graduation data with lower power, or displaying a partial or full screen in a mobile device, for example, a cell phone.

A planar antenna manufactured by patterning a substrate consisting of a dielectric layer, and first and second conductive layers applied, respectively, to both opposite surfaces of the dielectric layer. A first slot is formed in the first conductive layer for radiating electric waves. A second slot is formed in the first conductive layer for intercepting a particular frequency of the electric waves radiated by the first slot. A power supply portion is formed with the first conductive layer for supplying electric current to the first slot. A radiating element formed with the second conductive layer, which is excited by the electric waves radiated by the first slot, and radiates the electric waves.

A disk-shaped information recording medium has spiral tracks in which land- and groove-shaped tracks are alternately switched in units of rounds, and one index header which is aligned in the radial direction of a disk and is allocated at only the boundary between the land- and groove-shaped tracks.

The invention discloses an experimental device for promoting gas flowing with ultrasonic waves. The experimental device comprises a rock core holding unit, a constant-temperature regulating module and an axial load and confining pressure module, wherein a rock core inside the rock core holding unit is connected with a gas gathering and pressurizing module and a vacuumizing module; an ultrasonic loading module is arranged around the rock core holding unit which is connected with a vibration detection module; the experimental device further comprises a measuring and data acquisition module which is used for acquiring the axial load and the confining pressure of the rock core and the pressure and speed at a gas inlet. The experimental device for simulating the gas flowing rules of coalbed methane in immediate vicinity of wellbore under ultrasonic loading is capable of providing different temperatures and experimental conditions under three-axis stress states; ultrasonic fields with different frequencies and different power are respectively loaded in a vertical flowing direction, a down-flowing direction and a reverse flowing direction; impacts of an ultrasonic and mechanical vibration and a thermal effect to the gas flowing can be separated through a water-bath constant-temperature module; an impact of single factors such as mechanical vibration and thermal effect to the flowing can be simulated.

The invention discloses a method using a delay line type surface acoustic wave sensor to test characteristic parameters of an article and belongs to the technical field of novel sensor testing. The method can test the characteristic parameters based on amplitude-frequency characteristics and phase characteristics of the delay line type surface acoustic wave sensor. Firstly, a signal source outputs drive signals in a certain frequency range at certain frequency space sweep frequency, the resonant frequency can be obtained by measuring the signal amplitude ratio between input drive signals and output response signals of all sensors at all frequency points in a sweep frequency range, the signal source can output fixed-frequency drive signals on the basis, and the characteristic parameters of an object to be detected can be accurately detected by measuring the phase difference between the input drive signals and the output response signals of the sensors. The method enables the delay line type surface acoustic sensor to break the lab using limit and achieves industrial online application.

A controller that controls a switching element of an inverter using pulse width modulation is applied to a power converter including an inverter, to realize a stable change of a carrier frequency, current control responsiveness, and inverter loss suppression. The controller includes a carrier-frequency setting unit that sets a carrier frequency command used for pulse width modulation of an inverter corresponding to a current command and a current-command change rate. The carrier-frequency setting unit includes a carrier frequency map having mapped thereon information of a carrier frequency corresponding to a current command expressed in a vertical axis and a current-command change rate expressed in a lateral axis, and outputs information of a carrier frequency on the carrier frequency map corresponding to the input current command and the input current-command change rate to a switching pattern calculator.

The invention relates to the field of magnesium alloy, in particular to a preparation method of a comprehensive protective wave-absorbing coating on the surface of magnesium alloy and various coatings prepared by the method. The wave-absorbing coating is coated on a micro-arc oxidized ceramic layer on the surface of the magnesium alloy, so that the comprehensive coating which is good in corrosion resistance and in wave-absorbing functionality can be prepared. The invention adopts a magnesium alloy micro-arc oxidation technology and a wave-absorbing coating composite technology, the stable micro-arc oxidation technology is carried out in case of large area by the magnesium alloy micro-arc oxidation technology, and a ceramic layer with a compact microstructure is prepared, so that the corrosion resistance of the magnesium alloy can be obviously improved. The wave-absorbing coating composite technology can be used for sealing the ceramic layer, so that the corrosion resistance of the ceramic layer can be further improved, and the ceramic layer has the function of wave absorption as well. The comprehensive coating provided by the invention has the characteristics of being good in corrosion resistance, wide in electromagnetic wave absorbing frequency range, high in absorption rate, firm in surface bonding and the like, is widely applicable to the fields such as aviation, aerospace, war industry and electronic products, and is high in social value and economic value.

The invention provides a continuously adjustable degradable terahertz meta-material based on optical driving and preparation method thereof. The degradable terahertz meta-material comprises a sodium alginate substrate, a metal layer and a semiconductor film which are arranged on the sodium alginate substrate; the patterns of the metal layer and the semiconductor film are completely same: three equally spaced openings are formed on the outer ring, two equally spaced openings are formed on the middle ring, and one opening is formed on the inner ring; one of the three openings on the outer ring is aligned with one opening on the middle ring, and the other opening on the middle ring is aligned with the opening on the inner ring. Since the concentrations of carriers produced by the semiconductor film under different optical power excitations are different, the continuous tuning on the electromagnetically responded resonance strength from different conductivities is realized. The meta-material provided by the invention is simple in structure and processing technique, has degradable property and can be used for biomolecule detection, so that the incident electromagnetic wave of the terahertz meta-material has a plurality of frequency bands with continuously tuned strength in the terahertz waveband transmission.

A voltage controlled oscillator enables controlling the MOS transistor threshold voltage independently of the temperature compensation control signal and external voltage frequency control signal. The voltage controlled oscillator has a crystal oscillator and a load capacitance is parallel connected to a crystal oscillator. The load capacitance includes a first MOS transistor comprising a gate terminal and a source/drain terminal formed by shorting the source and drain, and a second MOS transistor comprising a gate terminal and a source/drain terminal formed by shorting the source and drain. First and second control signal generating circuits supply respective control signals to the source/drain terminals and gate terminals of the first and second MOS transistors.

A system to control an asynchronous tri-phase motor where said system comprises: at least one filter directly coupled to the current of the Alternative Current (AC) line; a rectifier which rectifies the line current, a doubler which reduces the curl, elevates the voltage and delivers a voltage in Direct Current, a braking resistance which helps to dissipate energy when the system is in braking mode, a shunt resistance, which helps to measure the current which flows from the V-line between the doubler and the IGBT module, a source, which adapts the voltage which the microcontroller consumes and peripheries (operational amplifiers, detectors, etc.), a line regulator to remove curls and line noise, a microcontroller to process, admit and emit control signals, a potential module which emits a PWM train pulse with a frequency determined by the microcontroller towards the IGBT module when the microcontroller indicates such, an IGBT module, which receives the PWM pulse train adapting and coupling them to an H bridge, to thus allow the flow of high voltage in DC emanating from the doubler towards the electric motor, a retro-feeding line towards the microcontroller to measure current, a velocity detector coupled mechanically to the motor and which sends a signal or pulse train towards the microcontroller; as well as the acceleration or braking methods consistent in the measurement of the slip S of said tri-phase motor.

A vaginal regeneration device is provided and method of promoting regeneration of vaginal tissue is provided. The method includes providing a patient having a vagina in need of vaginal tissue regeneration vaginal lubricant and a vaginal regeneration device. The vagina is lubricated and the regeneration device is inserted into the patient's vagina, wherein the vibrating mechanism is activated, allowing the vibrations to contact the vaginal wall for a therapeutic period of time. The device includes a shaft having a first end and a second end, a tapered insertion at said first end of said shaft and an end cap at said second end of the shaft, and a vibrating mechanism within the shaft. The invention further is directed to kits for promoting regeneration of vaginal tissue comprising at least two vaginal regeneration devices having different diameters along the majority of the length of the shaft.

An oscillator uses a differential signal corresponding to a difference between an oscillation output f1 of a first oscillator circuit and an oscillation output f2 of a second oscillator circuit as a temperature detection value, and outputs a control signal for reducing an influence caused by a temperature characteristic of the oscillation output f1 based on the differential signal. The oscillator includes a switching unit configured to alternately switch between a first state where a first connecting terminal and a second connecting terminal are connected to a storage unit for access of an external computer to the storage unit, and a second state where the first connecting terminal and the second connecting terminal are respectively connected to a first signal path and a second signal path via a frequency reduction unit such that the output signals from the frequency reduction unit are extracted to an external frequency measuring unit.