8 results about "Wave resonance" patented technology

This invention provides a photovoltaic module cleaning system and method based on multi-band acoustic wave resonance, relating to the field of photovoltaic power generation cleaning technology. The system includes an acoustic wave generating array, an infrared thermal imager, a microphone array, and a controller. The acoustic wave generating array, infrared thermal imager, and microphone array are all electrically connected to the controller. The infrared thermal imager is used to monitor the temperature distribution on the surface of the photovoltaic module, and the microphone array is used to monitor the acoustic wave distribution on the surface of the photovoltaic module. The controller controls the acoustic wave generating array to emit multi-band acoustic waves with frequencies ranging from low to high onto the surface of the photovoltaic module to excite dust particles of different sizes on the surface of the photovoltaic module to resonate. The controller also controls the acoustic wave parameters of the multi-band acoustic waves according to the temperature distribution and / or acoustic wave distribution. Based on the principle of multi-band acoustic wave resonance, this invention can achieve efficient, non-destructive, and zero-water-consumption cleaning of photovoltaic modules, reducing the operation and maintenance costs of photovoltaic power plants.

The application provides an antenna assembly, a main radiator comprising a first free end, a second free end, a feed point and a tuning point; a parasitic radiator comprising a third free end and a first grounding point, the third free end and the second free end being a coupling gap; a signal source being electrically connected to the feed point, the signal source being used to excite a first resonance mode on the main radiator to support a first frequency band, and the signal source being used to excite a second resonance mode on the parasitic radiator to support a second frequency band and to excite a target high-order mode on the main radiator to support the second frequency band, the target high-order mode and the second resonance mode together forming a double-wave resonance to support the second frequency band; one end of a switch switching circuit being electrically connected to the tuning point, and the other end being grounded; the switch switching circuit being used to switch a sub-frequency band of the first frequency band, and the second frequency band supported by the second resonance mode and the target high-order mode remaining constant when the sub-frequency band of the first frequency band is switched. The application can improve the performance of the antenna and save the occupied space.

The embodiment of the invention discloses a new energy grid-connected harmonic suppression regulation and control method and device, electronic equipment and a medium. A specific embodiment of the method comprises the following steps: performing variable window Fourier transform on a power instantaneous value sequence set, and then performing impedance compensation to obtain a compensated power harmonic spectrum diagram set; performing critical point identification on the new energy grid-connected power region to obtain a harmonic resonance critical point set; performing early warning grade division on the harmonic resonance critical point set to obtain an early warning grade critical point set; performing harmonic time sequence prediction on the compensated power harmonic spectrogram and the inverter power information to obtain a harmonic prediction amplitude oscillogram; and performing harmonic suppression control on the early warning grade critical point to obtain grid-connected harmonic regulation and control information, and performing equipment regulation and control processing on the power equipment. According to the embodiment, the early warning accuracy of the harmonic resonance risk and the efficiency of suppressing the harmonic resonance can be improved, the equipment delay is reduced, the safety of the new energy grid-connected equipment is improved, and the power loss is reduced.

The present application relates to a kind of superpower high frequency on-line ash removal device, it relates to industrial ash removal equipment field, the device includes installation cylinder, movable cylinder, waveguide, frequency wave resonance generator and loudspeaker extension tube, and the depth is adjusted by multistage air cylinder driving movable cylinder axial telescopic adjustment, motor drives rotating ring rotation adjustment circumferential position, air cylinder drives ball hinge swing adjustment angle, realize that loudspeaker extension tube is adjusted in any position and orientation in three-dimensional space, high frequency sound wave makes soot resonance drop, realizes on-line ash removal, the ash removal range of the present application is wide, positioning is accurate, strong adaptability, and it is applicable to the on-line ash removal operation of boiler, preheater, dust collector and other equipment.

The application discloses a kind of self-adapting audio compensation method and system based on acoustic impedance real-time monitoring of ear canal, at least one ear canal standing wave resonance frequency is identified by establishing individualized reference impedance spectrum in advance, in normal audio playing process, narrow-band oscillation component near the resonance frequency generated by normal audio signal itself excitation is extracted in real time using feedback microphone, so that only in initial calibration, weak detection signal with amplitude lower than hearing threshold or normal playing level is allowed to be used, in normal listening process, any active detection signal is not used at all, the influence on hearing is minimized, and there is no need to interrupt or superimpose test tone, the problems that existing active detection mode interferes with normal listening experience, measurement results lack real-time, compensation lags behind continuous change of ear canal state are solved.

Embodiments of the present application provide a method for determining the frequency of an offshore wind turbine support structure and related equipment. The method comprises: obtaining a wave scatter diagram corresponding to each wind speed, and generating a wave spectrum corresponding to different wind speeds based on the wave scatter diagram; in the case where the offshore wind turbine support structure needs to be optimized in frequency, calculating the probability of the wind speed corresponding to each wave spectrum, and multiplying the probability by the value of the wave spectrum corresponding to the wind speed to obtain an energy spectrum corresponding to different wind speeds; superimposing each energy spectrum according to the energy corresponding to the frequency to obtain an energy density index curve; and selecting, based on the energy density index curve, a frequency with the lowest energy density index in a preset range as the optimized frequency of the offshore wind turbine support structure. The present application can reduce the probability of wave resonance and the load of the support structure.

The application discloses an intelligent structure water cup based on the synergistic effect of infrared light radiation, audio frequency resonance and vortex stirring. The water cup integrates three physical field processing technologies: a near-infrared LED annular array (850nm+940nm dual-wavelength) performs light radiation processing on water; a 432Hz base frequency audio wave resonance system influences water molecule arrangement through audio wave vibration; and a magnetic force driven vortex stirring system generates controllable vortex water flow. The three physical fields work synchronously under the coordination of an intelligent control system, and realize the multi-physical field synergistic processing on drinking water. The water cup has the characteristics of portability, low noise and intelligent control, and is matched with a mobile application for data tracking and parameter customization.