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42results about How to "Suppress noise transmission" patented technology

Anti-vibration bracket for tubular motor

A bracket includes a rigid member that can be fastened to a fixture such as a wall, and flexible elements depend downwardly from the rigid member and are engaged with a tubular motor assembly of a window covering, awning, projector screen, or the like, to couple the motor assembly to the fixture while attenuating the propagation of vibrations from the tubular motor assembly to the fixture. This reduces noise in the room. The flexible elements may be flexible strings, elastic strings, or coil springs and have horizontal stiffness coefficients much lower than the vertical stiffness coefficient.
Owner:SOMFY SAS

Resin-made floor panel structure

The resin-made floor panel structure including a trunk floor F1 made of resin integrally forming a spare tire storage space S1, and a trunk board B1 made of resin disposed so as to cover the floor panel, fitting parts Sw1, Bk1 for achieving the closure of the spare tire storage space are integrally formed respectively in the trunk floor and trunk board. Thereby, in using resin materials for a floor panel, transmission of noise in the floor section to the compartment side can be suppressed by a relatively simple structure without increasing the weight.
Owner:GP DAIKYO +1

Circuit device, oscillator, electronic apparatus, and moving object

A circuit device includes a power supply circuit and a digital temperature compensated oscillation circuit. The digital temperature compensated oscillation circuit includes an A / D conversion unit, a processing unit, and an oscillation signal generation circuit. The A / D conversion unit performs A / D conversion of a temperature detection voltage from a temperature sensor unit. The processing unit performs temperature compensation processing of an oscillation frequency based on temperature detection data. The oscillation signal generation circuit generates an oscillation signal of the oscillation frequency using frequency control data and a vibrator. The power supply circuit includes at least one reference voltage generation circuit that generates a reference voltage based on a work function difference between transistors. The power supply circuit supplies the reference voltage generated by the reference voltage generation circuit to the digital temperature compensated oscillation circuit as a power supply voltage.
Owner:SEIKO EPSON CORP

Device mounted apparatus, test head, and electronic device test system

A device mounted apparatus includes a board on which a plurality of devices are mounted and a device cooling cover covering the plurality of devices, and formed inside it with a channel through which a refrigerant can flow. The device cooling cover includes a first cover covering only the measurement device among the plurality of devices, and a second cover covering only the power device among the plurality of devices. The first cover and the second cover are electrically insulated from each other.
Owner:ADVANTEST CORP

Reliability based weighted least square phase unwrapping calculation method

ActiveCN107977939AAvoid spreadingRemove smoothing effectImage enhancementPhase unwrappingLeast squares
The invention discloses a reliability based weighted least square phase unwrapping calculation method. Industrial camera equipment shoots and collects a speckle interferogram of an object to be detected, and the speckle interferogram is processed to obtain a 2D phase wrapping image including 3D information of the object to be detected; second-order differential calculation of a wrapping phase value is used to obtain the reliability of each point in the wrapping image; and a reliability threshold is calculated and determined, a binary mask layer factor is calculated and obtained and serves as aweighted least square phase unwrapping weight, iterative calculation is carried out, and a final real phase is obtained. The method has the advantages that a weighted least square calculation methodprovides a smooth solution, and calculation is high in speed and precision, noise spreading is inhibited effectively, a smooth effect is eliminated, and the like.
Owner:ZHEJIANG SCI-TECH UNIV

Printed circuit board

InactiveUS20130170167A1Reduce radiation noiseSuppress propagation of noiseCross-talk/noise/interference reductionSemiconductor/solid-state device detailsPrinted circuit boardEngineering
A multi-layer printed circuit board includes an embedded capacitor substrate composed of a power source conductor layer and a ground conductor layer, the layers being disposed close to each other. The power source conductor layer has a first power source plane to supply power to a circuit element, and a second power source plane that is separated from the first power source plane by a gap and functions as a main power source. The first power source plane is partially connected to the second power source plane by a connecting line. The ground conductor layer has an opening at a position overlapping with a projected image when the connecting line is projected on the ground conductor layer. This structure suppresses propagation of the noise caused at the circuit element and reduces radiation noise in the printed circuit board.
Owner:CANON KK

Noise reduction system, a method and a helicopter

A noise reduction system for connecting a noise source with a body, having at least one piezoactuator for suppressing a noise transmission from the noise source to the body. The noise reduction system has a first carrying structure to be connected with the noise source and a second carrying structure to be connected with the body. The at least one piezoactuator is positioned in series with the carrying structures and connects them with each other, such that the at least one piezoactuator forms a structural loaded part.
Owner:AIRBUS DEFENCE & SPACE
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