166 results about "Periodic wave" patented technology

A memory device includes a counter suitable for counting the number of times that a periodic wave is enabled and generating a code, one or more memory banks each including a plurality of word lines, and one or more measurement blocks corresponding to the memory banks, respectively, and suitable for measuring an active period of an activated word line in a corresponding memory bank among the memory banks, wherein each of the measurement blocks measures the active period of the activated word line based on a first value of the code at an activation starting point of the corresponding memory bank and a current value of the code.

The invention relates to a method for measuring high reflector reflection index which is characterized in that it adopts square wave or sinusoidal wave modulated wide-spectrum continuous laser as light source which enters into the stable resonator formed by two blocks of high reflectors; it uses square wave to modulate the up stage and down stage of the single period wave to obtain the lasting time and the channel reflecting index or uses fixed phase mode to detect the one-time or odd harmonic of light channel output signal; it uses the amplitude and the phase spiked value to modulate the angle frequency changing curve to obtain the lasting time and the channel reflecting index.

The invention relates to high head, large unit width flood energy dissipation by hydraulic jump technique, in particular to a high-low bucket energy dissipation pool of hydraulic jump, wherein the invention adopts a proper contraction angle in the plane of the high bucket, and outside wall of the high bucket does not contract, after the flood of high bucket contracts, the distribution in the vertical section of flooding is changed, when the downstream water level is high, part of the flood entering the pool is properly raised to reduce flooding degree and to fully exert the characteristics of submerged jets, thereby lengthening the distance between the flood to the pool bottom plate, weakening surface periodic wave, improving effects, reducing tail bucket water surface fluctuating, and avoiding vertical-axis eddy at the backward-facing step boundary wall.

A self-propelled mechanical crawler adapted to move on a medium. One example of such a crawler includes a foot, a wave generator adapted to drive a periodic wave in the foot, and a wave transfer mechanism coupled between the wave generator and the foot. The wave transfer mechanism may be adapted to translate the periodic wave produced by the wave generator into a corresponding periodic deformation in the foot so as to generate forces in the medium to propel the crawler.

A noise detection circuit includes a first delay unit suitable for delaying a periodic wave to output a delayed periodic wave, a first divider unit suitable for dividing the delayed periodic wave to output a first periodic wave, a second divider unit suitable for dividing the periodic wave to output a divided periodic wave, a second delay unit suitable for delaying the divided periodic wave to output a second periodic wave, and a detection unit suitable for comparing the first periodic wave with the second periodic wave and outputting a noise detection signal.

The invention discloses a touch sensing device which utilizes the characteristics of orthogonal vectors. A driving signal is modulated by means of an RSS (Random Spread Spectrum) signal or a periodic wave, thus driving one column of a sensing array. The RSS signal or the periodic wave is used for extracting the touch signal of a node from sensed signals measured by one column of the sensing array. The node is the intersection point of the driven column and the measured column. When different RSS signals and/or different periodic waves are utilized to simultaneously drive a plurality of columns, the touch information of a plurality of points can be obtained simultaneously from the same sensed signal by extracting the touch information of the plurality of points by means of the RSS signals and/or the periodic waves, respectively; and the plurality of points are the intersection points of the driven columns and the measured column.

The rotation-angle detecting device of the present invention contains two rotators having the same number of teeth, which engage with a gear fixed to a rotation-detecting axle as a detected object. The detecting device further includes a controller. Receiving a rotation-angle signal from the rotators, the controller amplifies the signal, performs calculations, and stores the results. The controller converts each rotation-angle signal from each rotator into each periodic waveform output having the same crest value, and stores an initial phase difference value at initial setting. In driving operations, monitoring an evaluation value calculated with reference to the initial phase difference value, the controller determines that abnormalities occurred, if the evaluation value exceeds a predetermined abnormality-evaluation threshold.

A method and apparatus for generating a laser signal for driving a laser used in thermal-assisted recording. A channel of a hard drive generates a high-frequency component of the laser signal—e.g., a periodic wave or series of pulses—and synchronizes the phase of the laser signal with a corresponding write data signal which controls the magnetization of data bits within the magnetic disk of the hard drive. The channel may be connected to a read/write integrated circuit via a channel interconnect. The read/write circuit may include a second phase control to compensate for any phase shift and an adder circuit to combine the transmitted high-frequency laser with a DC bias. Further, the read/write circuit may include a feedback loop for adjusting the DC bias based on environmental parameters of the hard drive such as temperature.

An integrated circuit includes a programmable storage unit suitable for operating with a plurality of powers and outputting stored data in response to a boot-up signal, a register unit suitable for storing the data outputted from the programmable storage unit, a internal circuit suitable for operating by using the data stored in the register unit, a voltage detection unit suitable for activating a power stabilization signal when levels of the plurality of powers are stabilized, and a boot-up control unit suitable for counting a number of activations of a periodic wave from a time of an activation of the power stabilization signal and activating the boot-up signal when the counted number reaches a predetermined number.

The invention relates to a coding wave-absorbing meta-material for the reflection section reduction of a broadband radar, and relates to the technical field of radar hiding and novel artificial electromagnetic materials. The meta-material comprises a plurality of periodic unit structures, and each unit structure comprises an upper conductive film layer, a dielectric substrate and a metal reflection backboard, wherein the upper conductive film layer is located on the upper surface of the dielectric substrate. The plurality of unit structures are arranged to be symmetric, thereby guaranteeing that an electromagnetic wave represents polarization insensitive characteristics. The wave-absorbing meta-material is spatially arranged, and has the symmetry breaking characteristics, wherein the arrangement mode is determined by the characteristics of the coding wave-absorbing meta-material. The wave-absorbing meta-material can achieve the RCS reduction effect (10dB or more) in a range of 6.5-20 GHz. Particularly, the target RCS reduction effect is better than the RCS reduction effect of pure periodic wave-absorbing materials in the range of 9-20GHz. The coding wave-absorbing meta-material isbetter in target RCS reduction than a conventional coding meta-material and the wave-absorbing materials. Moreover, the meta-material is simple in technology, integrates the structure with the functions, is small in areal density, and can play an important role in the field of target hiding.

The embodiment of the invention provides a control method and device of an inverter and an inverter system. The control method and device of the inverter and the inverter system solve the problems that in a photovoltaic grid-connected electricity generation system, in order to improve the utilization rate of direct current at the two ends of a solar panel for the inverter, common mode components are usually injected into modulating waves of the inverter for three times, and therefore the conversion efficiency of the inverter is low. The control method of the inverter comprises the steps that the voltage of the direct current currently output by a solar panel array connected with the inverter is determined, when the voltage of the direct current is larger than or equal to the current preset voltage, the modulating waves are output to the inverter, the modulating waves only contain periodic waves with a preset frequency, and the modulating waves are used for controlling the inverter to convert the direct current output by the solar panel array into alternating current, and when the inverter converts the direct current with the voltage larger than or equal to the current preset direct current into the alternating current under the control of the modulating waves, the distortion of the alternating current is located in a range currently permitted by a power grid where the inverter is connected into.

Provided is a method of controlling and adjusting at least one body feature of a subject using electronic mobile devices worked by a person in need thereof and measuring devices interconnected thereto.