450 results about "Resonance chamber" patented technology

The invention provides a piezoelectric two-phase flow ultrasonic atomization spraying nozzle. The piezoelectric two-phase flow ultrasonic atomization spraying nozzle comprises a piezoelectric vibrator, an amplitude-change pole, a second end cover and a first end cover; the piezoelectric vibrator and the amplitude-change pole are connected through a connecting bolt; an air inlet connector is installed at the tail of the connecting bolt; the second end cover is fixed to the front end of the amplitude-change pole; a laval type valve element is fixed into a step hole of the amplitude-change pole and a groove of the second end cover; a liquid inlet hole is formed in the hole wall face of the step hole of the amplitude-change pole; a plurality of flow guide holes are formed in the positions, close to an outlet, of the laval type valve element in the radial direction; the first end cover is threaded connection to the second end cover; a radial positioning ring is arranged at the position of a clamping groove in the back end of the first end cover; a step type taper valve is installed on the radial positioning ring; the step type taper valve and a vibration separating plate are connected through an adjusting bolt; a resonance chamber is formed between the vibration separating plate and the top end of the first end cover; and a plurality of flexible pipes are arranged in the resonance chamber. According to the piezoelectric two-phase flow ultrasonic atomization spraying nozzle, a large number of superfine fog drops are generated under the low-energy working condition, and the shortcoming that large pulverization amount, small grain size, low power dissipation and directed spraying cannot be considered at the same time through in the traditional technology is overcome.

An ink cartridge has a sensor to detect ink. A printer's control device transmits a detection command and specified detection condition to the ink cartridge by radio communication. In response to input of the detection command into the ink cartridge, a sensor controller actuates and vibrates the sensor under the specified detection condition. The sensor is attached to a resonance chamber disposed in an ink chamber. The frequency of vibration of the sensor is regulated by a resonance frequency of the resonance chamber. The resonance frequency is varied by ink in the resonance chamber. Detection of the resonance frequency specifies if ink is in the resonance chamber and the remaining quantity of ink in the ink cartridge. The printer's control device receives the detection result together with the detection condition from the ink cartridge, and cheeks if detection was carried out under the specified detection condition, validate the detection result.

Cavity enhanced absorption spectroscopy systems and methods for detecting trace gases. When the frequency of laser light approaches the frequency of a resonance cavity mode, the laser begins to fill the cavity to that mode. Optical intensity inside the cavity reflects total cavity loss when the laser light frequency coincides with the cavity mode transmission peak. The intra-cavity optical power also depends on the coupling efficiency of the laser beam to the particular cavity mode. Measurement of intensities of three optical signals, namely, intensity of the light incident on to the cavity, intensity of the light reflected from the cavity, and intensity of the intra-cavity optical power, with their appropriate normalization advantageously significantly reduce effects of baseline calibration and drift as the normalized signal only depends on total cavity loss, and not the coupling efficiency, as in traditional approaches.

The invention is a spectrum device used for analyzing the system circuit stabilization. The device is arranged on the system circuit, comprising at least one spectrum resistance / capacitance component. At least a part of the spectrum resistance / capacitance component consists of dielectric materials increasing or reducing the resistance / capacitance with the frequency increase. The benefit is that the resistance / capacitance value is not fixed, but changes with the energy spectrum distribution, thus the component is used for resisting a match dynamically, deriving to build an infinite-grade resonance chamber, solving the system duality problem, and beneficial to the non-linear dynamic system stabilization; and, basic problems consisting electricity, such as dynamic power factor adjustment, dynamic adaptive damping and adaptive all-pass filter and so on, can be solved fully; any complex non-linear system, such as power system, signal treatment, system reorganization, system integration and so on, can be stable, loyal, harmonious and balanced.

A cellular phone having a first opening for delivering voice on a shell is provided. A printed circuit board (PCB) is disposed within an inner space enclosed by the shell and divides the inner space into a first acoustic room and a second acoustic room. A speaker is disposed within the first acoustic room and electrically connects the PCB. A through hole is formed on the PCB to communicate the first acoustic room and the second acoustic room to increase the size of total resonance chamber for improving resonance effect in low frequency voices. Furthermore, at least a second opening is formed on the shell to communicate the first acoustic room or the second acoustic room to the environment for flattening the resonance curve to improve the voice quality.

The present invention relates to an acoustic attenuation device for an intake line of an internal combustion engine and to an intake line such as this incorporating same. An acoustic attenuation device according to the invention is intended to have a flow of pressurized gaseous fluid passing through it and comprises:a conduit structure which has a tubular wall ending in two ends, these respectively being the fluid inlet and fluid outlet ends, which are able to be incorporated into the intake line, andat least one resonance chamber which is arranged on the outside of this structure and which communicates therewith via at least one opening formed in said wall, the or each chamber being axially delimited by two transverse partitions. According to the invention, the or each chamber further comprises at least one gravity discharge orifice for discharging condensate which is formed in said wall in the vicinity of one of the transverse partitions, the or each chamber being delimited by two longitudinal walls which are joined together by these transverse partitions thereby forming a housing which is closed by a cover formed as one piece with this housing.

The semi-hollow body for stringed instruments includes a plurality of resonance-enhancing baffle pairs, each resonance-enhancing baffle pair having a bifurcated prong shape, similar to a tuning fork. The resonance-enhancing baffle pairs extend from an interior peripheral area of the instrument body and create various combinations of baffled and un-baffled regions in a resonance chamber of the semi-hollow body. A solid, central core region separates an upper resonance chamber from a lower resonance chamber. Alternatively, individual resonance enhancing baffles shaped like reeds are disposed inside the instrument body. The semi-hollow body for stringed instruments can be adapted for guitars, violins, mandolins, ukuleles, or the like, and provides a rich, resonant tone to the instrument while avoiding acoustic feedback problems associated with hollow body instruments. Front and back plates cover front and back portions of the body to give it a solid body look and feel.