Apparatus and method for non-contact measurement of solution concentration

Abstract

The invention discloses a device for measuring solution concentration without contact and a method thereof. The device comprises an absorption light source (100), a reference light source (200), a photoelectrical detecting device (600) and a computing unit (700). The absorption light source (100) emits absorbing light with specific wavelength which is absorbed by substance for measuring the concentration but is not absorbed or is absorbed less by other substance in solution (500) to be measured. The reference light source (200) emits reference light with the specific wavelength which is not absorbed or is absorbed less by any substance in the solution (500) to be measured. The absorbing light and the reference light illuminate into the solution (500) to be measured. The photoelectrical detecting device (600) receives the absorbing light and the reference light which are reflected or transmitted after penetrating the solution (500) to be measured, a light intensity signal is transformed into an electrical signal to be sent to the computing unit (700) for analyzing and processing, and the concentration of the substance in the solution (500) to be measured is obtained.

Description

technical field [0001] The invention relates to a device and method for non-contact measuring solution concentration. Background technique [0002] At present, the technology that does not require direct sampling to measure the concentration of the solution will be greatly utilized in the field of biochemistry. [0003] For example, there are two methods for measuring the concentration of substances in the aqueous humor: the first method is a destructive detection method, that is, before each measurement, a needle tip is used to pierce the cornea into the aqueous humor to extract the aqueous humor, and the extracted aqueous Water is used for analytical measurement of the concentration of specific substances (with physical and chemical measurement methods). The advantage of this method is that it is accurate, but the disadvantage is that it causes damage to the eyes of living organisms, and this method limits the detection frequency. The second method is a minimally destruc...

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Problems solved by technology

[0005] However, due to the extremely small deflection angle of the signal, and there are more than 20 kinds of biochemical substances in the aqueous humor of the eyeball, which have optical rotation effects, the most important of which are glucose and whole protein, which will cause measurement deviations. In addition, the birefringence and optical rotation of the cornea not only Interfering and reducing the transmitted light intensity further increases the difficulty of detection

Therefore, although this method has achieved good experimental results when measuring the glucose solution of human physiological concentration in vitro, the actual measurement effect on isolated human eyes is not good.

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