36results about How to "Reduce resonance amplitude" patented technology

A ram air turbine assembly includes a preferentially located mass that modifies the resonance frequency of the assembly so that vibration is reduced to desired levels. The example mass can be fixed in a specific location on the ram air turbine or can be deployable once the ram air turbine is moved to an operating position.

The invention discloses an audio playing method and device, belonging to the technical field of computers. The method is applied to an electronic device provided with a hard disk and an audio output device, and the method includes: acquiring an audio data frame to be played; reducing the volume value of the audio data corresponding to a pre-stored interference frequency point in the audio data frame , to obtain the audio data frame after the volume reduction processing; perform audio playback according to the audio data frame after the volume reduction processing. By adopting the invention, the working stability of the hard disk in the electronic equipment can be improved.

The invention discloses a durable hinge, which relates to the field of hinges, and comprises a detachably connected upper shell, a lower shell and a positioning block installed between the two. A cavity is arranged in the positioning block, and a Install a buffer mechanism and a driven rotation mechanism connected with the door, the buffer mechanism is used to reduce the rotation speed of the driven rotation mechanism, and a liquid circuit is also provided in the buffer mechanism, and the liquid circuit is used to improve the speed of the driven rotation mechanism The stability of the rotation, the present invention drives the buffer mechanism to move by setting the driven rotation mechanism, so that when the door rotates, it needs to overcome the resistance of the buffer block, slider, and spring, thereby decelerating and reducing the impact on the door and the door frame. A liquid circuit is set inside to reduce the resonance amplitude of each mechanical component in the device while further decelerating, improve the rotation stability of the driven rotating mechanism, reduce damage to the mechanical components, and prolong the service life of the device.

The invention relates to a shield besides road to adsorb noise, which comprises a sound adsorption shield and a support frame, wherein the shield plate and the support frame or / and support frame and the base are connected via flexible element or / and damping element, the flexible element and the damping element can be serially, parallel or integrally connected. The invention can improve sound adsorption ability and protect the base, with long service life, less increase on the load of road, and high safety or the like.

The invention relates to a hand-held sphygmomanometer provided with an anti-shock structure, characterized in that the sphygmomanometer is provided with an upper casing, a lower casing, an inner casing assembly, a valve body assembly, an inflatable assembly, a pressurized ball sheath, an airway Structure and anti-shock mechanism, the inner shell assembly is arranged between the upper shell and the lower shell, an anti-shock mechanism is set between the inner shell assembly, the upper shell, and the lower shell, and the lower part of the shell is provided with a valve The valve body assembly is connected to the inflatable assembly through threads, a sealing ring is provided between the valve body assembly and the inflatable assembly, and an air passage structure is provided between the valve body assembly and the inner shell assembly to communicate. The overall structural design of the technical solution is ingenious, and the purpose of shock resistance is well achieved through the principle of damping and shock absorption.

The invention relates to a centrifugal mass (1) of a change-speed gearbox of a motor vehicle, comprising a coupling means (7) for connecting the centrifugal mass (1) to a selector shaft and a cantilever (2) to a switching mass (4), which is arranged at the radially protruding end (5) of the cantilever (2). The cantilever (2) is made of a material that is lighter than the switching mass (4).

The invention relates to a novel antitheft tag magnetic material and a production process of the novel antitheft tag magnetic material, wherein the producing process comprises the steps of: adopting a cold-rolled steel plate and hot-rolling the cold-rolled steel plate to the thickness of 1+ / -0.2 mm; coating heat treatment protective paint which is 0.5+ / -0.05 mm in thickness and contains 1% of Nb on the surface of the hot-rolled steel plate; carrying out heat treatment on the hot-rolled steel plate which is coated with the heat treatment protective paint at the temperature of 850-900 DEG C; carrying out heat treatment at the temperature of 700-750 DEG C; and cooling. The invention also relates to an acoustic magnetic antitheft tag; a magnetic biasing piece is made from the novel antitheft tag magnetic material; and a resonant sheet is made from a microcrystal soft magnetic material. In the invention, stainless steel materials which are low in cost and can be produced in batch by stainless steel manufacture factories are taken as raw materials, so that the defect that the existing semi-hard magnetic materials are less in manufacture factory, long in ordering cycle and high in cost is solved; and as the novel antitheft tag magnetic material is a magnetic material with high coercive force and low residual magnetism, the structural design of the acoustic magnetic antitheft tag is simplified, and the manufacturing cost is greatly reduced.