50results about How to "Stable vibration frequency" patented technology

A composite damper for a speaker comprises an inner ring surface material, an outer ring surface material, and a plurality of ribs connected between the inner ring surface material and the outer ring surface material. The inner ring surface material and the outer ring surface material have a plurality of alternating concentric peaks and valleys; thereby when it is coupled with a periphery of a voice coil of the speaker, it has a more stable vibration frequency.

The invention provides an intelligent self-adaptive vibration absorber. The intelligent self-adaptive vibration absorber comprises a driving body, a mass body, an elastic beam, a terminal limiting sensor and a piezoelectric sensor device, wherein the driving body is arranged at one end of the elastic beam; the mass body is movably arranged on the elastic beam, and moves in a reciprocating way along the elastic beam under the driving force of the driving body; the terminal limiting sensor and the piezoelectric sensor device are arranged on the end part of the other end of the elastic beam; self-adaptive control of the inherent frequency of the vibration absorber is realized through adjustment of the length of a cantilever beam formed on the elastic beam by the mass body. Meanwhile, the invention provides an array integrating device based on the intelligent self-adaptive vibration absorber and application of the intelligent self-adaptive vibration absorber. The intelligent self-adaptive vibration absorber is simple in structure, and is suitable for multi-field popularization; precision suppression of single vibration of a controlled object can be realized, precision suppression control can be performed on multi-frequency laminated vibration of the controlled object, and inertial driving and power generation application are realized through structural specificity.

The invention relates to a curtain wall panel earthquake simulation system vibration performance parameter detection device and a method thereof. The detection device includes a vibration table, a fixing base, three laser light sources and three four-quadrant laser detectors, three sets of current and voltage conversion modules, three sets of computation modules, three sets of analog-to-digital converters and a micro controller; a motor is arranged inside the vibration table; the fixing base is in the shape of a cube; three surfaces of the fixing base which are perpendicular to an X axis, a Y axis and a Z axis are provided with a light reflecting plate respectively; the fixing base is in rigid connection with the vibration table through a connection rod; the three laser light sources are arranged above and opposite to the light reflecting plates respectively; and the three four-quadrant laser detectors are respectively arranged above and are opposite to the light reflecting plates. With the curtain wall panel earthquake simulation system vibration performance parameter detection device and the method thereof of the invention adopted, fast and accurate detection of vibration table high-frequency vibration performance parameters can be realized, and therefore, the problem of insufficient detection accuracy is high frequency vibration in an earthquake simulation system can be solved.

The invention provides a string vibration speed measurement experiment instrument with a vibration motor as a wave source. The string vibration speed measurement experiment instrument with the vibration motor as the wave source aims to solve the technical problems that according to an existing string vibration experiment instrument, an equipment structure is complicated, manufacturing cost is high, a dead zone exists during an experiment, the experiment efficiency is low, and the demonstration effect is poor. The string vibration speed measurement experiment instrument comprises an experiment instrument body. A base is arranged at the bottom of the experiment instrument body, and a vibration motor assembly is installed on the experiment instrument body. The vibration motor assembly is installed on a supporting stand column through a fixing flat plate. The vibration motor is installed in the vibration motor assembly. An eccentric block is installed on the right side of an outer rotating shaft of the vibration motor. A speed measurement disk and a photoelectric door are installed on the left side of the outer rotating shaft of the vibration motor. A direct-current power source speed measurement instrument is installed on the right side of the base. A voltage adjusting and frequency adjusting power source and a motor speed measurement instrument are installed on the direct-current power source speed measurement instrument. The voltage adjusting and frequency adjusting power source is provided with a voltage adjustment and frequency adjustment alternation switch, a power switch and the like. The motor speed measurement instrument is provided with a power supply switch, a frequency switch and the like. When the string vibration speed measurement experiment instrument is used, through the steps of power source connection, voltage adjustment and the like, the string vibration frequency is obtained by measuring the vibration frequency with the vibration motor as the wave source finally. According to the string vibration speed measurement experiment instrument with the vibration motor as the wave source, the structure is reasonable, and an operation method is easy to grasp.