Vibration isolation mechanism based on ratio electromagnet

A proportional electromagnet and vibration isolation technology, applied in the direction of the electromagnet with armature, electromagnet, magnetic spring, etc., can solve the problems of complex mechanical structure and system, high cost, and achieve good effect, small coupling and easy adjustment. Effect

Active Publication Date: 2015-05-20
INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

The mechanical structure and system of Micro-g LaCoste's super spring are ver

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  • Vibration isolation mechanism based on ratio electromagnet
  • Vibration isolation mechanism based on ratio electromagnet

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] A vibration isolation mechanism based on a proportional electromagnet provided in an embodiment of the present invention can be applied to an absolute gravimeter. The vibration isolation object of the vibration isolation mechanism in the absolute gravimeter is usually a reflective optical device, such as a corner cube, which can be installed on the top of the load rod 1 . The vibration isolation mechanism provided by the embodiments of the present invention is also widely used in fields such as aerospace, optics, machining, medical treatment and manufacturing.

[0023] figure 1 It shows a ...

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Abstract

The invention discloses a vibration isolation mechanism based on a ratio electromagnet. The vibration isolation mechanism comprises a load rod, a first balance mechanism, the ratio electromagnet, a second balance mechanism, a micrometric displacement sensor and a PID operation control unit. The longitudinal central axis of the load rod coincides with the longitudinal central axis of the ratio electromagnet. One end of the load rod is used for bearing a system where vibration isolation is going to be conducted. The first balance mechanism and the second balance mechanism are used for providing the horizontal tension capable of limiting the load rod on the longitudinal central axis of the ratio electromagnet. The output end of the micrometric displacement sensor is connected with the PID operation control unit. The output end of the PID operation control unit is connected with the ratio electromagnet. The PID operation control unit is used for outputting a closed-loop control signal after conducting PID operation on the longitudinal opposite position. The ratio electromagnet works in a linear working area under the effect of the closed-loop control signal, outputs the force unrelated to displacement, and acts on the load rod so that the load rod can be in a suspended state and low-frequency vibration isolation can be achieved. The requirement for vibration isolation during high-precision absolute gravity measurement can be met.

Description

technical field [0001] The invention belongs to the technical field of vibration isolation, and more specifically relates to a vibration isolation mechanism based on a proportional electromagnet. Background technique [0002] The force exerted on an object by the attraction of the earth is called gravity. The gravitational object is the earth. The direction of gravity is always straight down. The magnitude of the gravitational force on an object is proportional to the gravitational acceleration g. An absolute gravimeter is an instrument that measures the acceleration due to gravity g. The vibration isolation mechanism is one of the key components of the absolute gravimeter. [0003] The FG5 absolute gravimeter produced by the Micro-g LaCoste company in the United States is one of the most accurate commercially produced absolute gravimeters. The mass block can effectively measure the falling distance of about 0.25m, and the total uncertainty of the measurement results can...

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Application Information

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IPC IPC(8): H01F7/12F16F6/00G05B11/42
Inventor 薛怀平田蔚郝晓光钟敏
Owner INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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