Optical fiber position digital encoder and uses thereof

Abstract

The invention relates to an optical-fiber position digital encoder and an application thereof, which is characterized in that the optical-fiber position digital encoder is formed by an optical-fiber position sensing head and a signal demodulation unit, which are mutually separated and are connected through optical fibers, and can realize the distant detection. The optical-fiber position sensing head is passive, is installed in a structure, and is connected with a driving mechanism. An encoder which is formed by a main raster and an indication raster can modulate optical signals which are transmitted from the single demodulation unit into real-time phase change countable optical pulse sequence, and then return to the single demodulation unit on the measured displacement or angle quantity under the effect of the driving mechanism, then the actual displacement or angle values of the optical fiber position sensing head are calculated after being conducted with phase demodulation and pulse counting by the signal demodulation unit, and finally data loading is realized through a standard communication interface. And the displacement sensing with high precision and large range can be realized through the combination of the optical fiber position digital encoder with a driving and exchange mechanism, thereby further forming an optical fiber sensor based on the displacement and angle detecting principle.

Description

technical field [0001] The invention relates to an optical fiber position digital encoder and an application thereof. The optical fiber position digital encoder can be applied to an optical fiber sensor based on displacement and angle sensing principles, and belongs to the field of optical fiber sensors. Background technique [0002] The measurement of position (angular position) or displacement (angular displacement) is the basic physical measurement of length (angle) in the field of measurement and sensing. There are many methods for displacement measurement depending on the measurement range and measurement accuracy. Generally, it can be divided into micro displacement measurement, small displacement measurement, displacement measurement and large displacement measurement, each with different measurement techniques. For small displacement measurement and displacement measurement, the most basic method is the method of scale (protractor), which requires people to get the r...

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Problems solved by technology

[0017] Aiming at the disadvantages of existing position digital encoders in long-distance measurement, no standing power supply, field, humidity, strong electromagnetic interference, inflammable and explosive applications, the purpose of the present invention is to provide an optical fiber position digital encoder and Its application is targeted to solve these shortcomings of existing position digital encoders

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