12 results about "Triangle wave" patented technology

A golf ball is disclosed herein that includes at least one radar detectable mark such that a projected pattern is formed when the at least one radar detectable mark is radially projected onto an outer surface of the golf ball. The projected pattern can have a first wave profile mapped along a path defined by a first spherical arc on the outer surface of the golf ball. The projected pattern can comprise at least one first crest and at least one first trough. The projected pattern can have a periodic function selected from: a sine wave, a sawtooth wave, a triangle wave, or a square wave.

An apparatus in a welding or cutting system comprises: an analog comparator to perform comparing a level of a voltage that is generated by a welding power supply of the welding or cutting system against an amplitude of an analog triangle waveform, to produce a binary waveform that has a first comparison level when the amplitude exceeds the level and a second comparison level when the amplitude does not exceed the level; and a digital controller configured to perform: measuring a first interval and a second interval over which the first comparison level and the second comparison level extend, respectively; computing an interval ratio based on the first interval and the second interval; and converting the interval ratio to a digitized value representative of the level of the voltage.

A golf ball is disclosed herein that includes at least one radar detectable mark such that a projected pattern is formed when the at least one radar detectable mark is radially projected onto an outer surface of the golf ball. The projected pattern can have a first wave profile mapped along a path defined by a first spherical arc on the outer surface of the golf ball. The projected pattern can comprise at least one first crest and at least one first trough. The projected pattern can have a periodic function selected from: a sine wave, a sawtooth wave, a triangle wave, or a square wave.

The invention relates to the technical field of CT (Computed Tomography) artifact correction and image processing, in particular to a CT image ring artifact correction method based on detector jitter, which comprises the following steps of: controlling a detector to jitter according to a preset periodic jitter track and acquiring a projection image during scanning; returning the image to a non-jittering state according to the track; carrying out CT reconstruction on the returned image; and performing bilateral filtering on the reconstructed CT image to obtain a corrected image. The jitter trajectory follows a triangular wave function, bilinear interpolation is adopted for return, an FDK algorithm is adopted for reconstruction, and a Gaussian weighting mode combining space and a pixel value domain is adopted for bilateral filtering. According to the method, a ring artifact generation mechanism is broken through physical jitter, edge protective filtering is combined, the image definition is kept while the ring artifacts are effectively removed, and the method has the advantages of being independent of additional correction, free of a large amount of training data and easy and convenient to implement.

The invention relates to a remote control directional sound broadcasting method and system. The method comprises the steps of receiving a first digital audio signal and converting the first digital audio signal into a first analog audio signal; converting the second digital audio signal into a second analog audio signal, performing bass band enhancement processing, and performing tone quality improvement processing; processing the PWM waveform through an operational amplifier integrating circuit to form a triangular wave, taking the triangular wave as a carrier wave, taking the second analog audio as a modulation wave, and modulating and superposing the triangular wave and the modulation wave to obtain a PWM wave of which the duty ratio changes according to the analog audio signal; and modulating the PWM wave to an ultrasonic frequency to obtain a first ultrasonic modulation signal, performing power amplification processing to obtain a second ultrasonic modulation signal, driving the transducer array through LC low-pass filtering and impedance matching, and transmitting an ultrasonic carrier wave through the transducer array. According to the invention, the defect that the existing directional sound system is limited to local independent control is broken through, multicast transmission is carried out through the IP protocol, and remote networking and strategy control are realized.

The utility model discloses a voltage boosting device completed by a comparator. The voltage boosting device comprises a triangular wave generating circuit, a direct current level circuit, a PWM waveform generating circuit, a push-pull driving circuit, a Boost topology, a current feedback circuit and a voltage feedback circuit. Triangular waves generated by the triangular wave generating circuit and direct-current level output by the direct-current level circuit are input into the PWM waveform generating circuit, the PWM waveform generating circuit adopts a comparator, the comparator forms PWM wave signals with high and low changes, the PWM wave signals switch on and off power switch tubes in the Boost topological structure through the push-pull driving circuit, and the power switch tubes are switched on and off through the push-pull driving circuit. Meanwhile, the output end of the Boost topology is connected with a current feedback circuit and a voltage feedback circuit, and the current feedback circuit and the voltage feedback circuit are used for controlling the duty ratio of the PWM wave signal to form a required output voltage value. According to the utility model, no software participates in boosting, all the boosting is realized by hardware, and the boosting function of an integrated circuit can be realized by building a plurality of low-cost discrete components.

A novel display device where a light-emitting element is turned on by a triangle wave is provided. One embodiment of the present invention is a method for driving a display device including a first pixel, a second pixel, a first wiring, a second wiring, and a third wiring. The first wiring is electrically connected to the first pixel and the second pixel. The second wiring and the third wiring are electrically connected to the first pixel and the second pixel, respectively. At a first time, the first pixel reaches the maximum luminance corresponding to first display data and the second pixel reaches the maximum luminance corresponding to second display data. The first pixel and the second pixel are initialized at a second time different from the first time by input of a reset signal to the first wiring to stop light emission.

The application relates to the field of spacecraft propulsion technology, in particular to a continuous adjustable electric propulsion testing method and device, the method comprising setting a test instruction change period synchronized with a satellite orbit period; constructing an atmospheric resistance interference model changing with an orbit phase and converting the atmospheric resistance interference model into a dynamic thrust demand benchmark; generating at least one dynamic thrust instruction in a sine wave, a triangular wave, a step signal or a composite waveform; using a three-dimensional interpolation matrix to solve power and gas supply parameters in real time and driving a thruster to perform wide-range dynamic adjustment; and evaluating dynamic tracking performance based on a root mean square error and a frequency response characteristic index. The application realizes high-fidelity ground reproduction of a complex interference environment of a satellite in orbit, overcomes the limitations of existing static tests and single working conditions, and provides a scientific and effective testing scheme for dynamic performance verification of a continuous adjustable electric propulsion system.

The invention discloses a D-type audio amplifier and a modulation method thereof. The D-type audio amplifier comprises a triangular wave generator, a waveform remodeling device and a pulse width modulator. The triangular wave generator generates a first triangular wave. The waveform remodeling device generates a second triangular wave by remodeling the first triangular wave. The pulse width modulator modulates a pair of differential audio input waves using a second triangular wave instead of the first triangular wave to reduce a switching loss of the class D audio amplifier.

The invention discloses a thin-film lithium niobate linear electro-optical modulator based on a double-injection structure, relates to the technical field of optical communication, and aims to solve the problems that an electro-optical overlapping factor of a traditional structure is low and is easily influenced by dispersion of microwave signals during high-frequency modulation, and the technical scheme is that the thin-film lithium niobate linear electro-optical modulator comprises a silicon dioxide substrate, a waveguide and a silicon dioxide cladding; the waveguide comprises an input waveguide, a Y beam splitter, a first connecting waveguide, a first directional coupler, a dissipater, a second connecting waveguide, a first straight waveguide, a second straight waveguide, a gold electrode, a second directional coupler and an output waveguide. Different transmission coefficients and coupling coefficients are set for the first directional coupler and the second directional coupler, and transmission responses of square waves, sine waves and similar triangular waves can be obtained. Through the synergistic effect of the two independent injection regions, three-signal resonance of a double-main-line waveguide signal and a micro-ring signal is realized, accurate regulation and control of an electric signal can be completed, a high-order nonlinear effect is inhibited, and the linearity is improved.

1. The name of the design product: multi-functional signal generator. 2. The use of the design product: can produce sine wave, square wave, triangle wave, can be used for laboratory experiments. 3. The design points of the design product: in the perspective view. 4. The picture or photo that best indicates the design points: perspective view.

This invention discloses a self-contained magnetic field generator with adjustable output parameters and its method. The magnetic field generator comprises a main control unit, a battery unit, a shielding structure unit, and a Helmholtz unit. The main control unit and battery unit are enclosed within the shielding structure unit, effectively suppressing interference from these components on the stable magnetic field generated by the generator, thus improving the accuracy of the generator's parameter output. While meeting preset output value requirements, the generator can receive commands from an external calibration controller via the RS-232 interface reserved in the MCU control unit, enabling magnetic field output modes such as steady-state output, sine wave output, square wave output, and triangular wave output to suit different application scenarios. Through its structured design, powered by a rechargeable battery, and with integrated cabling for all functional units, this invention is suitable for outdoor applications without requiring extensive transportation, assembly, or external auxiliary equipment.