Rotary vibration table
A vibrating table and rotating table technology, applied in measuring devices, instruments, speed/acceleration/shock measurement, etc., can solve the problems of poor calibration accuracy, high calibration cost, structural damage, etc., and achieve small test damping, low manufacturing difficulty, The effect of simple structure
Inactive Publication Date: 2014-07-30
INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION +2
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Problems solved by technology
Since the seismic rotation signal is a low-frequency component, it is also a low-frequency vibration component that causes structural damage. In addition, the mass of some instruments used for seismic six-degree-of-freedom measurement is much greater than 10kg. Therefore, the current angular vibration table calibration still has poor calibration accuracy and low bearing capacity. , Calibration costs are high, and there is an urgent need for a cheap, high-capacity rotating vibration table to calibrate the sensitivity, frequency response and other parameters of seismic rotation measuring instruments
Method used
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Embodiment Construction
[0012] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0013] Depend on Figure 1-Figure 3 It can be seen that the rotary vibrating table of the present invention includes a base plate 15, a rotary table 27, an exciter 1, a signal conditioning control system 28 and a measurement system, and the rotary table 27 includes a vertical shaft 7, a circular rotary table top 8, and a vertical shaft 7 The upper part is connected with the circular rotating table 8 through precision bearings, the lower end of the vertical shaft 7 is installed on the bottom plate 15 through the rotating table base 17, the rotating table connector 5 is installed on the edge of the circular rotating table 8, and the vibrator 1 is passed through the The vibrator base 14 is installed on the bottom plate 15, including a coil frame 20, a pole piece 21, a moving coil 22, and a yoke 23. The moving coil 22 is wound on the coil frame 20 ...
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The invention relates to a rotary vibration table. The rotary vibration table comprises a base plate, a vibration table body, a vibration exciter, a signal conditioning control system and a measuring system. A rotary table top connector is arranged at the edge of a circular rotary table top. A moving coil stretches into a magnetic gap, and the magnetic gap is formed by the outer side of a cylindrical pole shoe and the inner side of the front portion of yoke iron. A leaf spring is arranged in the front of a coil rack. A vibration excitation connector is connected with the left end of a connecting rod, and the right end of the connecting rod is connected with the rotary table top connector. A sinusoidal signal generated by a signal source is input to a signal conditioner to be conditioned and undergo power amplification and is then input to the moving coil through a vibration exciter socket. The output of a linear acceleration meter, the output of a reference angle acceleration meter and the output of an acceleration meter to be calibrated are connected with the input of a collection analyzer. The rotary vibration table is simple in structure, reasonable in design, high in calibration accuracy, large in bearing capacity, low in calibration cost and long in service life, and can be used for calibrating various earthquake slew acceleration meters.
Description
technical field [0001] The invention relates to a vibrating table, in particular to a rotating vibrating table used for calibrating a seismic rotational accelerometer. Background technique [0002] At present, with the frequent occurrence of large earthquakes, countries around the world are strengthening the observation of the three translational motion records of earthquakes, and at the same time carrying out the research on the rotational component of the earthquake and the development of measuring instruments, proposing a variety of methods for measuring the rotational component of the earthquake and developing the Various types of measuring instruments. There are angular vibration tables used for gyro calibration at home and abroad, and their frequency range is 5-500Hz. In my country, there is only one set of low-frequency angular vibration tables of 0.1-100Hz, and the price is expensive. The principle of the angular vibration table generally adopts the scheme of torque...
Claims
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Inventor 杨学山高峰匙庆磊刘华泰车晓军董玲杨立志杨巧玉王南
Owner INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION