Dual Parameter Fiber Optic Sensor for pH and Dissolved Oxygen Measurement
A dissolved oxygen, dual-parameter technology, applied in the direction of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of mutual interference of sensors, single parameter of sensors, etc.
Active Publication Date: 2014-10-15
SHANGHAI JIAOTONG UNIV
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[0007] Another object of the present invention is to provide a dual-parameter optical fiber sensor for pH value and dissolved oxygen measurement, which overcomes the shortcomings of single parameter measurement of existing sensors and mutual interference between different sensors, and realizes detection under conditions of limited space and a small amount of liquid. Simultaneous measurement of dual parameters of pH and dissolved oxygen
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[0022] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following Example.
[0023] Such as figure 1 As shown, the dual-parameter measurement sensor of this embodiment is composed of, in the figure: light source 1, optical fiber head 2, coupler 3, petri dish 4, sensor probe 5, connector 6, optical filter 7, photoelectric device 8, conditioner 9. Processor 10, modulator 11. Under the control of the modulator 11, the modulated laser light emitted by the light source 1 passes through the optical fiber head 2, the coupler 3, and the connector 6, and then reaches the sensor probe 5 for excitation, and the fluorescence signal related to pH and dissolved oxygen ...
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Abstract
The invention discloses a two-parameter optical fiber sensor used for measurement of a pH value and dissolved oxygen. The sensor comprises a light source, an optical fiber head, a coupler, a culture dish, a sensor probe, a connector, an optical filter, a photoelectric device, a conditioner, a processor and a modulator, wherein the sensor probe is composed of an optical fiber probe, a Si layer, a polymer substrate and a sensitive membrane; the end of the optical fiber probe is successively provided with the Si layer, the polymer substrate and the sensitive membrane; the sensitive membrane is composed of two sensitive materials which are a material sensitive to the pH value and a material sensitive to the dissolved oxygen; and the optical fiber probe is used as a fixing matrix and a light propagation element simultaneously, and transmits fluorescent signals emitted by the sensitive materials in the sensitive membrane to the subsequent photoelectric device. Disadvantages of single parameter measurement and mutual interference among different sensors in a conventional sensor are overcome; and simultaneous measurement of the pH value and the dissolved oxygen in the conditions of limit space and a little detection liquid are realized.
Description
technical field [0001] The invention relates to an optical fiber sensor, in particular to a sensor capable of simultaneously measuring the pH value and dissolved oxygen of a solution in a microbial reaction vessel. Background technique [0002] pH and dissolved oxygen (pO 2 ) are two important indicators for monitoring solution quality in many industrial and research fields. For example, pH and pO 2 The detection of the patient's blood, body fluids and respiratory function is a vital parameter in the clinical diagnosis. In the food industry, pH and pO 2 Indicators such as the quality of drinking water, the freshness of food, and the sterility of food and beverages require extensive testing. pH and dissolved oxygen concentration are also very important in seawater analysis and marine research. The pH value is also an important parameter in industrial wastewater treatment processes and in monitoring the acidity of rainwater. [0003] In the field of biotechnology, dissol...
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IPC IPC(8): G01N21/64
Inventor 赵辉陶卫胡艳丽刘泽敏
Owner SHANGHAI JIAOTONG UNIV