30results about How to "Avoid phase difference" patented technology

A steering damper apparatus includes: a body frame; wheels suspended by the body frame; a steering shaft rotatably supported by the body frame, one end of the steering shaft being connected to the wheel side; a handlebar connected to the other end of the steering shaft for rotating the steering shaft to steer the wheels; and a damper for damping the rotation of the steering shaft. The rotation of the steering shaft is damped by the damper only when there is an input from either the handlebar or the wheels.

An improved structure of audio signal cable, the features of which are that the audio signal cable is comprised of arrayed solid and tinsel wire conductors. After each of the conductors are insulated and bundled, they are placed into a surrounding insulation. The solid conductors are of a circular and a flat, thin shape. The solid conductors are of differing larger and smaller diameters and, furthermore, disposed in unequal quantities. The smaller diameter tinsel wires are twisted to increase distance and enlarge their surface area to reduce skin effect for better high frequency transmission, while the larger diameter conductors enable the rapid conveyance of low frequencies. As such, the present invention achieves the synchronous phasing of high and low frequency signals.

The invention provides a passive radiator loudspeaker system, which comprises a loudspeaker unit and a passive radiator unit, wherein the loudspeaker unit and the passive radiator unit are mounted coaxially. The loudspeaker unit and the passive radiator unit of the passive radiator loudspeaker system adopt a coaxial mode for sound production so that the phase difference of two unit sounds can be avoided effectively; besides, because the loudspeaker unit and the passive radiator unit are mounted in the coaxial mode, the mounting area of a box body of a sound box can be saved so that the box body of the sound box can be miniaturized to save the space.

The invention provides an automatic impedance matcher for a magnetostrictive transducer. The automatic impedance matcher comprises an impedance matching module, a signal collection module, a feedbackmodule, and a single-chip microcomputer control module; the impedance matching module comprises two sets of 8-channel 5V relay modules with optocoupler isolation functions, a 5V DC power supply, 16 CBB matching capacitors and 16 resistors with resistance of 1kohm; the two sets of relay modules have the same structure and respectively comprise 8 relays connected in parallel; DC + and DC- Ports of each set of relay modules are connected to a positive electrode c and a negative electrode d of the 5V DC power supply respectively; and an assorted H jumper cap is respectively inserted into each of high and low level trigger selection ends S1 to S16 of each relay. The automatic impedance matcher provided by the invention enables the transducer to continuously and stably work in a resonant state under different environments, working conditions and loads, thereby significantly improving the working efficiency of the transducer.

The invention relates to an all-digital hemispherical resonant gyro frequency tracking loop based on a Costas ring. A gyro electrode vibration signal sampling circuit collects vibration signals on anx electrode and a y electrode of a gyro respectively; the two paths of vibration signals are respectively subjected to multiplication phase discrimination with output signals of a sin branch and a cosbranch of a voltage-controlled oscillator through a multiplier, and then are filtered through each low-pass filter; the filtered signals are calculated by a phase error signal arithmetic unit to obtain a phase error signal, and the phase error signal is sent to a loop filter; the loop filter generates a control signal according to the input phase error signal, and the control signal adjusts the phase of the output signal of the voltage-controlled oscillator NCO, so that the phase difference between the vibration signal and the output signal is continuously reduced until the loop locking steady-state phase difference is 0; based on the Costas ring technology, the frequency tracking loop design of the full-digital hemispherical resonator gyro is realized in the FPGA, the design can improvethe precision of frequency tracking, and the frequency tracking loop has the advantages of simple structure and strong universality.

The invention provides a touch display device which comprises a display panel and a touch panel. The display panel is provided with a display surface, and the touch panel is arranged on a display surface side. The touch panel comprises a first membrane, a second membrane and a plurality of sensing electrodes, wherein the sensing electrodes are arranged on at least one of the first membrane and the second membrane. The first membrane and the second membrane are made of double-refraction materials and respectively provided with a fast-axis axial direction, and the fast-axis axial direction angle difference of the first membrane and the second membrane ranges from 70 degrees to 110 degrees. The invention further provides a manufacturing method of the touch display device.

The embodiment of the invention discloses a signal phase compensation method, and the method comprises the steps: receiving a test echo signal reflected by a test target object, and determining a first chirp signal and a second chirp signal from the test echo signal according to a preset sequence code; wherein the first chirp signal is a signal subjected to phase scrambling, and the second chirp signal is a signal not subjected to phase scrambling; determining a phase compensation value based on the phase of the first chirp signal and the phase of the second chirp signal; and performing phase compensation on the current echo signal by using the phase compensation value to obtain a compensated signal so as to perform target detection based on the compensated signal. Therefore, after the phase compensation value is determined based on the test echo signal, the current echo signal is subjected to phase compensation by using the phase compensation value, so that accurate descrambling operation on the current echo signal can be effectively realized, and the problem of system phase difference caused by limitation of hardware equipment is avoided; and the detection performance of the sensor on the target object is improved.

The invention provides a storage medium, as well as a two-way resonance circuit charging and discharging current regulating method, device and system, and relates to the field of power electronics. When absolute value of the difference between the current in the positive direction of a first circuit or a second circuit flowing through a two-way resonance circuit and being conducted and 0 is withina preset range, a driving circuit is controlled to drive a first switch tube and a third switch tube contained in the conducted first circuit of the two-way resonance circuit or a second switch tubeand a fourth switch tube contained in the conducted second circuit of the two-way resonance circuit to be cut off, so as to avoid the current zero crossing, prevent the greater phase difference between current and voltage, avoid the generation of reflux power, improve the conversion efficiency and avoid the generation of unnecessary heat, wherein the driving schedule logic of the first switch tubeis consistent with that of the third switch tube, and the driving schedule logic of the second switch tube is consistent with that of the fourth switch tube.

The invention discloses a symbol data sending and receiving method, a storage medium, sending end equipment and receiving end equipment, and the symbol data sending method comprises the steps: carrying out the extension of original data corresponding to each piece of symbol data in a baseband in a time domain from the start position of a time slot; for each expanded original data, performing backward cyclic shift on the current original data according to the length of the cyclic prefix of the current symbol data corresponding to the current original data and the lengths of the cyclic prefixesof all symbol data before the current symbol data in the time slot; taking each piece of original data after cyclic shift as a data part of the corresponding symbol data; for each symbol data, copyingthe data from the tail of the data part of the symbol data according to the length of the cyclic prefix of the symbol data to serve as the cyclic prefix of the symbol data; and sending out each symbol data. According to the technical scheme, the transmission efficiency of the symbol data can be improved.

The invention discloses a vehicle-mounted MIMO radar random coding waveform modulation method, and belongs to the field of millimeter wave radars. The method includes the following steps: setting a radar to be in a random coding mode; by arranging a random signal generator, when a radar signal is transmitted, resetting the random signal generator, and generating a group of random codes; after a random code is generated, writing the random code into a register, wherein when the radar transmits a radar signal every time, the radar signal is modulated by calling the code in the register; and inputting the demodulated data in the radio frequency chip into a decoder to generate a decoded receiving signal, so that a receiving end can receive an echo signal reflected after the emitted radar signal encounters an obstacle. According to the invention, each transmitted pulse initial phase is randomly coded in the processor, and transmitted signals of different codes do not interfere with each other, so that a plurality of millimeter wave radars can be used in the same environment, the robustness of the system is improved, and the anti-interference capability of the rail transit radar can be greatly improved.

The embodiment of the invention discloses a signal transmission method and device in a display device and electronic equipment, and the method comprises the steps: obtaining the period of a data effective signal when a main time sequence controller receives initial synchronization data, wherein the initial synchronization data comprises the data effective signal and a clock signal; when the periodof the data effective signal is not equal to a preset period, adjusting the period of the data effective signal to obtain an adjustment signal, wherein the period of the adjustment signal is equal tothe preset period; enabling the master time schedule controller to send adjustment synchronization data to the master time schedule controller and each slave time schedule controller, wherein the adjustment synchronization data comprises the adjustment signal and the clock signal; and enabling the master time sequence controller and the slave time sequence controllers to transmit video signals according to the adjustment synchronization data respectively. According to the signal transmission method and device in the display device and the electronic equipment, the charging uniformity can be improved.

A SLM-based projection display system (10) samples and processes video data for delivery to a spatial light modulator (SLM) (13c), and uses a color wheel (14a) to color the SLM-generated images. A frame memory (13b) provides data to the SLM (13c) and is managed so that, if the phase of the incoming video signal changes, a desired phase relationship between the color wheel position and the data available to the SLM (13c) can be maintained. Also, a motor control unit (15a) uses a horizontal sync signal to generate a drive signal for the color wheel motor (16a), which limits the transient time during phase-changing events, and which provides a means for adjusting the phase of the drive signal.

The invention discloses an electrostatic spark energy automatic calculation method based on an LCR equivalent model. The method mainly comprises the following steps of: removing direct-current bias and high-frequency noise existing in discharge current; automatically acquiring a crest value of the discharge current waveform and a moment corresponding to the crest according to a preset discrimination condition; calculating oscillation angular frequency, system inherent inductance and first peak current according to the discharge period; calculating logarithmic attenuation rate, damping ratio, loop resistance, spark resistance and spark inductance; fitting the discharge current curve, calculating a fitting degree, if the fitting degree is superior to a set threshold value, executing subsequent operation, otherwise, returning to adjust the proportionality coefficient of the exponential terms in the spark resistance and the spark inductance; and calculating the electrostatic spark discharge energy. According to the method, the spark resistance is automatically solved only through the discharge current waveform data, the effectiveness of spark resistance solving is judged through the discharge current waveform fitting effect, and then the spark discharge energy is automatically calculated.

A linear array sound box disclosed by the present invention comprises a sound box body, a waveguide and a horn front shell, an installation cavity is arranged in the sound box body, the waveguide is fixed in the installation cavity, the front end of the waveguide is provided with a rectangular sound wave outlet, the rear end of the waveguide is provided with a circular sound wave inlet, and the horn front shell is fixed at the front end of the installation cavity. The horn front shell is connected with the sound wave outlet. The waveguide comprises a shell and a middle body installed in the shell, two curved surfaces which are vertically symmetrical are arranged on the inner wall of the rear end of the shell, two inclined surfaces which are vertically symmetrical are arranged on the inner wall of the front end of the shell, the rear end of each inclined surface is connected with the front end of the curved surface on the corresponding side, and the sound making angle of the horn front shell in the vertical direction is smaller than 90 degrees. The inner wall of the rear end of the horn front shell is provided with two extending surfaces which are symmetrically arranged up and down, and each extending surface coincides with the inclined surface on the side where the extending surface is located; the sound quality and the sound production effect of the linear array sound box can be improved.

The invention discloses a probiotic powder solid beverage mixing device, and belongs to the technical field of beverage processing, the probiotic powder solid beverage mixing device comprises a bottom plate and a rack fixedly connected to the outer wall of the top of the bottom plate, the inner wall of the rack is provided with a container assembly, the outer wall of the top of the container assembly is provided with a stirring assembly, and the stirring assembly comprises a cylinder cover and a lining arranged on the inner wall of the middle of the cylinder cover. The stirring assembly and the container assembly are arranged, various materials needing to be stirred are placed in the container assembly, the container assembly can provide a negative pressure environment, the internal temperature of the container assembly is reduced, internal temperature rise caused by mutual friction among particles in the material stirring process is avoided, and therefore the situation that the materials are melted is avoided; when the stirring assembly stirs the interiors of the materials, turnover can be conducted, the blending efficiency of the materials is improved, meanwhile, the height of the stirring assembly can be adjusted, adaptive stirring adjustment can be conducted according to the size of the needed materials, and when the stirring assembly is subjected to motion adjustment, the sealing performance of the container assembly can be guaranteed, and the materials are prevented from overflowing.

The invention discloses a self-adaptive adjustment method for transmitters, which relates to the technical field of optical networks. The self-adaptive adjustment method includes the following steps: (S1) a new service source node in an optical network acquires the transmitter parameter differences between the new service source node and an old service source node, and the new service source node and the old service source node are source nodes which have a common destination node; (S2) the new service source node adjusts transmitter parameters of self according to the transmitter parameter differences, so that the transmitter parameters of the new service source node can be equal to the transmitter parameters of the old service source node. The invention also discloses a self-adaptive adjustment system for transmitters. The invention prevents the difference in power and phase between services caused by different transmitters, thus guaranteeing the orthogonality of the subcarriers of different services, and cannot affect subcarrier modulation and the quality of separated signals, consequently, the system performance is enhanced, and the error rate is decreased.