Test paper reading method and test paper reading device

Abstract

The invention provides a test paper reading method and a test paper reading device, which can read dry chemical test paper strips, colloidal gold immunochromatograohic assay test paper strips / cards and rapid pesticide residue test cards, are easy to operate, need no extra detection instrument and equipment, can automatically judge and read the detection result by only acquiring corresponding developing pictures through electronic equipment such as computers or mobile phones, have reliable testing accuracy and are particularly suitable for personal and household wide application. The method comprises the following steps: A. acquiring images; B. processing the acquired images; C. performing negative and positive discrimination; and D. performing concentration conversion on a sample which is discriminated to be positive in the step C through a concentration-gray scale relation to obtain a concentration value of the to-be-tested paper card / strip. The device comprises a shell and a built-in standard gray scale strip, wherein the shell is provided with a standard gray scale strip display window and is also provided with a first card slot, a second card slot and a third card slot for arranging the colloidal gold card, the rapid pesticide residue test card and the dry chemical test paper respectively.

Description

technical field [0001] The invention relates to a test paper reading method and device, which are used for reading dry chemical test paper strips, colloidal gold immunochromatographic test paper strips or test paper cards, and pesticide residue rapid test cards for enzyme inhibition methods. Background technique [0002] As a rapid on-site detection method, the test paper method is characterized by simple operation, convenient portability, low price, and certain selectivity, accuracy and sensitivity. The test paper method includes dry chemical test paper, biological test paper, etc. Due to its characteristics of easy portability, simple operation, and fast measurement speed, it has attracted more and more attention from people, and it has played an increasingly important role in rapid on-site detection. Dry chemical test paper, pesticide residue test paper, colloidal gold test paper, etc. have been widely used in food, water quality, air, medical and health and other fields....

AI Technical Summary

Problems solved by technology

There are also some CCD-based colloidal gold test strip photoelectric detection instrument design and experimental research in China, such as the master's thesis "development of colloidal gold test strip photoelectric detection instrument" of Tianjin University School of Precision Instrument and Optoelectronic Engineering, CN101598599B provides a multi- Channel portable colloidal gold test strip rapid testing device, CN101769925A provides a method and system for intelligently identifying and reading immunochromatographic test strips and its application. It cannot detect dry chemical test paper, nor can it detect the rapid detection card of pesticide residues based on the enzyme inhibition method

What CN201773067U provides is a hand-held test paper reading device for machine vision, which is convenient to use in the field environment and can only detect chemical test paper strips

However, the color capture characteristics of these acquisition image capture devices can vary significantly from device to device, making accurate image capture nearly impossible

Professional spectrophotometer units are available on the market to obtain accurate color measurements, but these are beyond the reach of most homes or individual consumers

Images