A fiber optic pH meter

Abstract

The invention discloses an optical fiber pH meter, which includes a light source, an optical fiber tube, a temperature sensor and a spectrometer. The optical fiber tube comprises an optical fiber connecting part, and an input optical fiber and an output optical fiber that extend from one end of the optical fiber connecting part integrally. An induction optical fiber extends from the other end of the optical fiber connecting part integrally, and the outer surface of the induction optical fiber is provided with a sensitive film. Compared with pH meters in the prior art, the pH meter composed of the light source, the optical fiber tube, the temperature sensor and the spectrometer provided by the invention has shorter response time and better stability, can detect small change and rapid change of the pH value, and at the same time can adapt to various severe environments so as to achieve an accurate test result. In addition, related operation is carried out through a touch display screen on the spectrometer, and real-time monitoring of pH and corresponding temperature is performed on the touch display screen. Through organic cooperation of the pH sensitive film and the optical fiber tube, the optical fiber pH meter has stronger anti-electromagnetic interference ability and higher sensitivity, and is easy for remote monitoring of a measured signal.

Description

technical field [0001] The invention relates to the technical field of pH meters, in particular to an optical fiber pH meter. Background technique [0002] One of the main methods of traditional pH measurement is the potentiometric electrode method (such as glass membrane electrode). Due to the long response time and poor stability of the electrode, it is difficult to measure small and rapid changes in pH value; at the same time, the matrix is ​​large and not suitable for micro The online detection of the environment and living organisms is more difficult to adapt to the application in harsh environments. In addition, the pH test paper method cannot monitor local pH changes, let alone real-time monitoring. [0003] Optical fiber sensor is the product of the rapid development of optical fiber and optical communication technology. It uses light as the carrier of sensitive information and optical fiber as the medium for transmitting sensitive information. It has the advantage...

AI Technical Summary

Problems solved by technology

It is not easy to make an ordinary optical fiber into a sensor device. If the process is only done on the fiber core, the requirements for its process are even higher; and the reversibility of the usually selected sensitive material is poor, which limits its development

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