High-speed optical fiber balance interference vibration measurement system
A technology of balanced interference and optical fiber, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problem that the speed of the optical vibrometer cannot meet the measurement requirements, achieve good environmental adaptability, measurement accuracy, and easy operation , to solve the effect of environmental adaptability
Active Publication Date: 2015-07-22
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the existing optical vibrometers cannot meet the measurement requirements due to the speed limit in use, and propose a fiber optic balanced interference high-speed vibration measurement system
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Embodiment 1
[0022] Optical fiber balance interference high-speed vibration measurement system, such as figure 1 As shown, it is mainly used for high-speed measurement of solid waves in high-speed shock and vibration. The vibration measurement system consists of a balanced optical fiber coupling module (1), an interferometric measurement module (2), an optical fiber optical wavefront precision alignment module (3), control and information Output module (4), interference signal demodulation module (5), physical grating and measured object (6);
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The invention relates to a high-speed optical fiber balance interference vibration measurement system, and belongs to the technical field of precise measurement of high-speed impacts and vibration solid waves. The vibration measurement system comprises a balance optical fiber coupling unit, an interference measurement unit, an optical fiber optical wave face precise alignment module, a control and information output unit, an interference signal demodulation unit and a physical grating. A measuring light source forms two signal beams through a balanced type optical separation component, two light beams are projected on a measuring and separating type grating through an optical fiber space position demodulation component, measuring light carries speed measuring signals and returns to an optical interference component to form speed interference measurement signals, and speed demodulation and output is completed through an electronic demodulation system. A simple result is adopted, the measurement system is convenient to operate, low in cost and high in measurement and control precision, the balance interference method is adopted, and high-speed measurement and evaluation is achieved through the high-speed optical fiber balance interference vibration measurement system.
Description
technical field [0001] The invention relates to an optical fiber balance interference high-speed vibration measurement system, which belongs to the technical field of high-speed measurement of solid waves in high-speed impact and vibration. Background technique [0002] The high-speed measurement of solid waves in high-speed shock and vibration plays a very important role in the construction of the national economy and the development and production of national defense weapons and equipment. It is currently in universal demand in industrial production and testing. As the most important and widely used measuring instrument in the field of vibration testing, optical vibrometer has the advantages of good adaptability, high accuracy, fast dynamic response and discrimination of speed direction. [0003] However, due to the speed limit of the optical vibrometer in use, especially in the high-speed measurement of solid waves in high-speed shock and vibration, it cannot meet the cur...
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IPC IPC(8): G01H9/00
Inventor 朱振宇李新良梁志国李华丰李强张力
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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