640 results about "Phase displacement" patented technology

A system and method for providing interleaving point-of-load (POL) regulators such that each regulator's switching cycle is phase displaced with respect to those of other POL regulators in the array is disclosed. As a result, the aggregate input and/or output reflected ripple and noise of the input, output, or both is reduced. Each regulator in the array is associated with an unique address. A serial data-line writes the phase spacing programmed to each addressable POL regulator in the array. The present invention permits phase displacement of POL regulators without limitation to the input and output voltages of each of the regulators in the array. The array of POL regulators may also operate in a phase displaced mode with only a single control line. The need for separate controllers and multiple control lines is thereby eliminated.

The invention discloses a quadrature error closed-loop compensating circuit for a vibrating type silicon micromechanical gyroscope. A gyroscope detection signal enters a synchronous demodulation circuit by diving into two parts after being amplified and filtered: one part of gyroscope detection signal is demodulated through reference signals generated by a phase-locked loop, and after low-pass filtering is performed, an angular velocity signal is obtained; the other part of the gyroscope detection signal is demodulated through the reference signals, which is subjected to phase displacement for 90 degrees, and generated by the phase-locked loop, after low-pass filtering is performed, the voltage amplitude of quadrature error signals in the detection signal is extracted out, and a feedback control voltage is obtained through an integrating circuit; the feedback control voltage passes through a single-double switching circuit and is modulated to the driving frequency through a driving detection capacitance so as to generate a feedback current to compensate quadrature displacement current in the detection shaft direction, and then quadrature error amount in the detection signal is eliminated and finally, the pure angular velocity is obtained. According to the invention, the quadrature error amount in an angular velocity detection loop is eliminated by using the feedback current to compensate the quadrature displacement current in the detection shaft direction of the micromechanical gyroscope, and high-precision closed-loop compensating for the quadrature error of the vibrating type silicon micromechanical gyroscope is achieved.

The invention relates to a heterodyne three-frequency unequal range phase displacement solution phase method, and the method is as follows: selecting three frequencies, firstly adopting four-step phase shift method to obtain the package phase and average light intensity of the middle frequency, adopting two-step phase shift method to obtain the package phase corresponding to the two frequencies under the condition with known light intensity, obtaining the true phase according to the heterodyne method, adopting the contour line sine and cosine filtering method in the optical grating projection three-dimensional measurement, using stripe direction information for filtering the package phase on isophasal line, the method uses less projection picture for exactly measuring and uses the stripe direction information for filtering the package phase picture for effectively removing the inconsistent points in the package phase picture, the heterodyne three-frequency unequal range phase displacement solution phase method is used in the phase method three-dimensional shape measurement for effectively raising the measuring efficiency and measuring accuracy.

A phase difference detector having concurrent fine and coarse capabilities is enabled by synchronizing operations of the coarse phase detector to operations of the fine phase detector. In one embodiment, clusters of fine timing markers are generated by delay stages of a delay locked loop (DLL) that is locked onto a regulated frequency source. The K'th one of every cluster of J fine timing markers is designated as a coarse marker. A first timing means determines which of J fine markers in a first cluster is closest to a rising edge of a reference signal. A second timing means determines which of J fine markers in a second cluster is closest to a rising edge of a follower signal. A third timing means determines how many coarse markers separate the rising edges of the reference and follower signals. The first through third timing means operate in parallel. An arithmetic combining means combines temporal displacement values obtained from the determinations of the first through third timing means to thereby produce a phase displacement measurement signal of broad range and high precision across its operating range.

The invention discloses a structure illumination super-resolution microscopy imaging system and an imaging method thereof. The imaging system comprises an illumination light source, a rotating structure light generator, a first convergent lens, a light splitter, an objective lens, an object stage, a sample, a second convergent lens, a digital imaging device and a computer. An original image is processed through an imaging image reconstruction algorithm; super-resolution can be achieved only by rotating structured light stripes for four times without phase displacement; the imaging image reconstruction algorithm is based on frequency domain processing instead of non-spatial domain processing; a spectrum process of a super-resolution image of a sample is different from a traditional frequency domain method, structured light directions are not analyzed one by one and all directions are merged for analysis; in order to obtain traditional uniform 2-fold resolution improvement in various directions, the theoretical quantity of original images can be reduced to 4 from 9 of a traditional method; the quantity of the original images is further reduced to 3 and uniform 1.5fold resolution improvement in various direction can be theoretically obtained.

The invention discloses a multi-phase fluid oil displacement and pulse unblocking integrated physical simulation experiment device and method. The device mainly comprises a multi-phase fluid generation and storage system, a multi-phase fluid spreading and impulse wave generation system, a reservoir core simulation system and a dynamic experiment data collection system. The multi-phase fluid spreading and impulse wave generation system comprises a multi-phase fluid injection pipeline, a pulse oscillation generation cavity casing, a collision body and a multi-phase fluid output and pulse wave spreading pipeline. The device mainly utilizes difference of gas and liquid elastic modulus to achieve conversion between pulse unblocking/oil displacement and gas (steam) injection functions to simplify the oil displacement/pulse simulation process in different oil reservoir exploitation processes. The experiment can relate to simulation of experiment processes of miscible-phase displacement and gas water alternative oil displacement, reservoir pulse unblocking, thick oil thermal exploitation storage layer steam injection, oil displacement-unblocking and the like. The device is reasonable in design, simple in operation process and capable of effectively simulating the multi-phase fluid oil displacement and pulse unblocking effects.

The invention relates to a phase extraction method for a phase-shifting interferometric fringe. Phase measurement error is in sine periodic distribution, while each phase of a trigonometric function has opposite positive and negative amplitudes every pi, namely the error distribution is in revert phase. Therefore, a basic algorithm can be expanded, numerators and denominators in arc tangent formulae in multiple measurement groups are subjected to overlapping average respectively, and errors are reduced by utilizing mutual cancellation of error phase distribution. On the basis of the idea, a plurality of average compensation algorithms of different situations can be deduced. The algorithm is particularly insensitive to phase displacement errors, and the phase measurement accuracy can be remarkably improved.

A valve timing control device includes a driving side rotational member synchronously rotatable with a crankshaft of an internal combustion engine, a driven side rotational member synchronously rotatable with a camshaft that controls an opening and closing operation of valves of the internal combustion engine, a retarded angle chamber, an advanced angle chamber, a fluid supply and discharge mechanism, a lock mechanism for locking the relative rotational phase at a predetermined lock phase, a phase displacement restriction mechanism switching the relative rotational phase between a restricted state and an unrestricted state, the phase displacement restriction mechanism includes a recess portion and an insertion member so as to achieve the restricted state and the unrestricted state, and a retention mechanism for retaining the phase displacement restriction mechanism in the unrestricted state in which the insertion member is retracted from the recess portion.

A disturbance, such as vibration from human activity, is located along a fiberoptic waveguide configuration (301-304) with two interferometers (801, 802) of the same or different types, such as Mach-Zehnder, Sagnac, and Michelson interferometers. Carrier signals from a source (101) are split at the interferometer inputs (201, 202) and re-combined at the outputs (701, 702) after propagating through the detection zone (401), where phase variations are induced by the disturbance (501). Phase responsive receivers (901, 902) detect phase relationships (1001, 1002) between the carrier signals over time. A processor (1101) combines the phase relationships into composite signals according to equations that differ for different interferometer configurations, with a time lag between or a ratio of the composite signals representing the location of the disturbance. The detected and composite values are unbounded, permitting phase displacement to exceed the carrier period and allowing disturbances of variable magnitudes to be located.

An electro acoustic device and related method for increasing the production capacity of wells that contains oil, gas and/or water is disclosed. The electro acoustic device is submerged in the well producing zone, and includes an electric generator, one or more electro acoustic transducers, and one or more wave guide systems (sonotrodes) that include radiators which transmit vibrations into the medium under treatment. The electro acoustic device produces vibrations that stimulate the occurrence of mass transfer processes within the well. According to one or more embodiments, shear vibrations are produced in the well bore region due to the phase displacement of mechanical vibrations produced along the axis of the well, achieving alternate tension and pressure due to the superposition of longitudinal and shear waves.

The invention discloses a super-surface color vector complex amplitude holographic element, which comprises a bimetallic nanorod unit structure with adjustable in-plane rotation angles and in-plane displacement, wherein an aluminum-silicon dioxide-aluminum super-structure grating structure generates a polarization-selective type diffraction efficiency enhancement effect in a visible light range; asum of in-plane displacement of two metal nanorods in the unit structure and diffraction phase information are in a linear modulation relationship, a difference between the rotation angles of the twometal nanorods and a diffraction light amplitude are in a sinusoidal modulation relationship, and a sum of the rotation angles of the two metal nanorods and a diffraction light polarization directionare in a linear modulation relationship; and a color holographic method is implemented on diffraction level by utilizing the phase displacement based on inherent dispersion of the super-structure grating. The super-surface color vector complex amplitude holographic element disclosed by the invention has the advantages of low requirements for preparation control precision, simple structure, high degree of control freedom and the like, and has powerful functions of simultaneously controlling four parameters of light wave phase, polarization, amplitude and frequency.

The invention discloses a writing and triggering device of an electronic pen. The device comprises a pen shell and a pen tip; the device is characterized by further comprising a capacitor movable pole, a capacitor fixed pole, a flexible element, a capacitance value measuring circuit, a data processing circuit and a wireless transmitting circuit; the capacitor movable pole is arranged at the front end of the pen shell and can move vertically; the capacitor fixed pole is fixed in the pen shell and cannot move freely; one end of the flexible element is fixed at the capacitor movable pole, and the other end of the flexible element is fixed at the capacitor fixed pole or on a part with a phase displacement change with the pen shell; the capacitance value measuring circuit and a capacitance fixing circuit are formed into a capacitor body, and two poles of the capacitor body are respectively connected with a capacitance input end of the capacitance value measuring circuit; the digital processing circuit is connected with the capacitance value measuring circuit and used for reading the capacitance numerical value from the capacitance value measuring circuit; and the wireless transmitting circuit is connected with the data processing circuit and used for transmitting the pen tip touch data. The device provided by the invention can independently finish mechanical contact writing and triggering in a writing pen and can detect the wiring pressure size.

The invention provides a method for eliminating a direct coupling signal of a sensing logging instrument and a device thereof. A transmitting unit of the device comprises a transmitting coil; a receiving unit comprises a receiving coil, a compensating coil, a phase comparator and an amplitude measuring circuit, wherein, the input signals of the phase comparator are respectively a current or voltage signal passing through the transmitting coil and the sensing voltage of the receiving coil and used for measuring the sensing voltage of the receiving coil and the phase difference of the current or voltage signal passing through the transmitting coil under the following two conditions: the portion of the direct coupling signal of the sensing voltage of the receiving coil is increased in the air until a secondary sensing signal is small enough relative to the direct coupling signal, and the phase difference Theta 1 is measured; under normal condition, the phase difference Theta 2 is measured; the amplitude measuring circuit is used for measuring the amplitude value A of the sensing voltage of the receiving coil in a stratum under normal condition; and the formulas that R equals to A multiplied by sin (Theta 3) and Theta 3 equals to Theta 2 minus Theta 1 are utilized to calculate the amplitude value of the secondary sensing voltage. The method and the device can eliminate the errors caused by the phase displacement of the instrument and effectively eliminate the direct coupling signal.

A device for controlling variable speed electric motors, particularly for hand held power tools and other miniaturised electrically powered apparatuses, comprises an electronic driver unit (5) connectable to the terminals (2, 3) of an electric power source for supplying electric current to at least one electric motor (M) and an optical switch device (7) for triggering the electronic driver unit (5). The optical switch device (7) comprises light emitting means (8) and light transducer means (9) for detecting and converting light into an electric variable signal. The light transducer means (9) are operatively connected to the electronic driver unit (5) for controlling the electric motor (M). The light emitter means (8) comprise at least one white light, high brightness LED (D1, D2) connected in parallel to the electric power line terminals (2, 3) by means of a miniaturised power circuit. The miniaturised power circuit comprises at least one resistor (R2) when said at least one electric motor (M) is a DC motor, and a capacitive phase displacement power supply (C, R2) when said electric motor is an AC motor. The capacitive phase displacement power supply (C, R2) comprises at least one capacitor (C) and an input resistor (R2) adapted to supply said diodes (D1, D2) with a threshold voltage.

Processes and arrangements for the evaluation of laser Doppler signals, especially in laser Doppler anemometers (LDA) or vibrometers, are disclosed. The object of these processes and arrangements is to find a simple possibility for evaluating laser Doppler signals which retains the advantages of conventional frequency tracking demodulation and permits dependable actual measurements of velocities and derived movement values also for extremely low velocities and discontinuous particle flows. This object is achieved with the use of a laser Doppler anemometer (LDA) with bandpass filtration and frequency tracking demodulation, by generating at least one orthogonal frequency system which, as a sequence of four state intervals in an invertible one-to-one correlation, is formed of two additively superimposed rectangular functions with a phase displacement of pi /2, a detector signal containing the Doppler frequency (fD) is compared after bandpass filtering with respect to its phase with the state intervals of the orthogonal frequency system, wherein a change in the phase position relative to the orthogonal frequency system triggers a compensation of the change in Doppler frequency generating a regulated mixing frequency (fM) which is coupled into the LDA, and the regulated mixing frequency (fM), as an equivalent of the Doppler frequency (fD), is likewise compared with an orthogonal frequency system and, as a result of the one-to-one sequence of state intervals, is evaluated such that the direction is designated.

The invention discloses a dual output DC-DC converter for a multiplexing bridge arm. The converter comprises a first contravariant bridge arm and a second contravariant bridge arm which respectively consist of a power switching tube with inverse parallel diodes, a first output circuit and a second output circuit, wherein the first output circuit is connected between middle points of the first contravariant bridge arm and the second contravariant bridge arm; the second output circuit is connected between the middle point of the second contravariant bridge arm and the negative electrode of a power supply (or the middle point of a capacitive division network); the first output circuit consists of an isolated rectification circuit and a filter circuit, and output of the circuit is adjusted through phase displacement between the first contravariant bridge arm and the second contravariant bridge arm; the second output circuit consists of a resonant network, a second rectification circuit and a second filter circuit, output of the circuit is adjusted through frequency; the first path output and the second path output are independent and not affected with each other; the first contravariant bridge arm is used as a lead bridge arm in phase-shifting control, each power switching tube can easily realize zero voltage switching; and the second contravariant bridge arm used as multiplexing bridge arm of two paths output realizes energy of a soft switch to be supplied together by the two paths output, thereby easily realizing zero voltage switching as well.

The invention discloses a microwave millimeter wave three-dimensional holographic imaging system signal processing and imaging method. Echo signals are obtained in the microwave millimeter wave antenna array scanning process, and image focusing is carried out on a (y,k) dimension through a phase displacement migration algorithm; image focusing is carried out on the x-dimension by adopting a backward projection reconstruction method; finally, a three-dimensional complex image of an imaging target is obtained. The method integrates the characteristics of a time domain imaging algorithm and a frequency domain imaging algorithm, decoupling and imaging focusing are carried out on a vertical array dimension and a distance dimension through the phase displacement migration algorithm, the backwardprojection reconstruction algorithm is used for imaging focusing of a planar or cylindrical motion scanning dimension, and the advantages that the backward projection reconstruction algorithm is suitable for any antenna scanning rack and capable of facilitating motion compensation are used, so that the method is suitable for a microwave millimeter wave planar scanning imaging system and a microwave millimeter wave cylindrical scanning imaging system, the aim of being applicable to the two kinds of imaging systems though one-time algorithm development can be achieved, clear imaging can be achieved, and the calculation efficiency is higher.