CN106852680A - The preparation method of portable anerythrochloropsia quantitative analyzer - Google Patents

Abstract

Portable anerythrochloropsia quantitative analyzer, is related to a kind of colour blindness analytical instrument.A kind of, the portable anerythrochloropsia quantitative analyzer that by the subjective consciousness of people is not controlled relevant with the physical property for stimulating is provided.It is provided with detecting electrode, reference electrode, signal acquisition circuit, signal transacting and control module, keyboard and colorful display screen；Detecting electrode is provided with test electrode and reference electrode, test electrode signal output termination signal acquisition circuit signal input part, reference electrode signal output terminates signal acquisition circuit input, signal acquisition circuit signal output terminates signal transacting and control module input, signal transacting and control module output termination colorful display screen input, keyboard output end connect signal transacting and control module input.

Description

The preparation method of portable anerythrochloropsia quantitative analyzer

Technical field

The invention belongs to medical treatment detection device field, it is related to a kind of colour blindness analytical instrument, more particularly, to a kind of portable anerythrochloropsia quantitative analyzer.

Background technology

Colour blindness is a kind of common ophthalmology disease, wherein again in the majority with protanopia anerythrochloropsia patient.In people's production and living, the particularly field such as traffic, medical science, instrument, weaving and fine arts, if shades of colour can not be distinguished correctly, will bring great inconvenience, or even cause unnecessary loss.Therefore, colour blindness detection is the inspection project of China's routine physical examination.At present, the widely used pseudo-isochromatic diagram method of China carries out colour blindness detection, and using colour blindness book as detection instrument, it can only provide qualitative examination result, and Subjective by measured is detected.In recent years, some patents also provide the quantitative determination of colour blindness.Whether the application for a patent for invention of Publication No. CN1559338A discloses a kind of for detecting the normal instrument of human body colour vision and detection method, by computer, high-performance color CRT monitor, light electric standard human eye scaling system, specific response keyboard, printer, light shield and lower jaw support frame are constituted, the vision signal of computer export is to high-performance colorCRT, the print command of output is to printer, light electric standard human eye scaling system detection automatic detection signal to computer data-interface, the signal output part of specific response keyboard to computer input through keyboard interface.Its advantage one is the psychological physic quantitative determination that the machine that realizes controls full-automatic colour anomaly；Two be by one-shot measurement by obtain from neutral ash and confuse line to red, green, blueness, the colour vision-identification threshold value in yellow direction along red _ green and yellow _ blue color, the corresponding relation of, colour blindness normal from colour vision clinically and various different anomalous trichromatism degree is set up, so as to the automatic ration for realizing colour anomaly is detected.A kind of notification number human eye's chromatoptometry instrument for the utility model patent of CN2458609Y is provided, it includes power circuit, the video output signals of polychromatic source adjusting apparatus, lead up to video signal cable to connect the signal input part of video window, lead up to video line and connect colour vision and compare process circuit, the signal output part that process circuit is compared in colour vision connects testing result display, connects printer all the way through video signal cable all the way.Its advantage doctor by adjusting polychromatic source adjusting apparatus, can make examinee completed in several seconds detection, and can sharp picture show and quantitatively record examinee colour vision degree.The Chinese utility model patent of Patent No. 92204086. 9 provides a kind of quantitative color vision tester for checking colour vision function, category person under inspection is reflected in yellow red green three coloured light on circular observation window by observation, and is carried out stepless matching colors into gold-tinted and being measured with red green two light.Trichromat can quickly complete above-mentioned yellow-yellow luminous intensity distribution, and colour blindness and tritanope can then be made into Huang _ red or yellow _ green glow.The instrument changes according to the light intensity of the red green three coloured light of Huang, is determined through light intensity and amplified, and is in numerical monitor test value after digital operation.Therefore accurate qualitative and quantitative can be made to the colour vision of patient and is determined.Can above-mentioned patent be all to produce different color modes through a generator, correctly differentiate these color modes by measured to provide the color discrimination ability of measured, and they all rely on the subjective judgement of measured.

The content of the invention

Portable anerythrochloropsia quantitative analyzer relevant with the physical property for irritating it is an object of the invention to provide a kind of, not controlled by the subjective consciousness of people.The present invention is provided with detecting electrode, reference electrode, signal acquisition circuit, signal transacting and control module, keyboard and colorful display screen；Detecting electrode is provided with test electrode and reference electrode, test electrode signal output termination signal acquisition circuit signal input part, reference electrode signal output terminates signal acquisition circuit input, signal acquisition circuit signal output terminates signal transacting and control module input, signal transacting and control module output termination colorful display screen input, keyboard output end connect signal transacting and control module input.Signal transducting wire between the detecting electrode and signal acquisition circuit is preferably shielding line.The detecting electrode and reference electrode preferably use silver _ silver chlorate disc electrode.The signal acquisition circuit is preferably sequentially provided with preamplifier, high-pass filter, L grades of main amplifier, photoisolator, 50Hz trappers, the 2nd grade of main amplifier, low pass filter and analog-digital converter by signal from detecting electrode to signal transacting and control module direction of transfer.The output end of the input termination preamplifier of high-pass filter, the L grades of output end of the input termination high-pass filter of main amplifier, input the 1st grade of output end of main amplifier of termination of photoisolator, the output end of the input termination photoisolator of 50Hz trappers, the 2nd grade of output end of the input termination 50Hz trappers of main amplifier, input the 2nd grade of output end of main amplifier of termination of low pass filter, the output end of the input termination low pass filter of analog-to-digital conversion part.Preamplifier constitutes difference amplifier using 0P284, high-pass filter is made up of resistance-capacitance network, L grades of main amplifier is constituted using two panels instrument amplifier AD8221, photoisolator is using U.S.'s Agilent (Agilent) company photoelectric coupling chip HCN201,50Hz trappers are using the double T trappers of AD4899-1 compositions, 2nd grade of main amplifier uses the instrument amplifier AD603 of gain-variable, low pass filter constitutes Butterworth filter using 0P284, and analog-digital converter uses the AD7665 chips of analog device (ADI) company.The colorful display screen is preferably with TFT True Color LCD.When the present invention is used, test electrode and reference electrode are respectively placed at measured's head, riding position is located at the Fz in 10 20 system electrode placement methods of the electroencephalogram world and Oz, the color pattern of different brightness ratios is shown by colorful display screen to irritate measured, the i.e. measurable neuroelectricity for irritating induction, then analyzes the colour vision ability that these Evoked ptentials then obtain measured.Because Evoked ptential belongs to exogenous Evoked ptential, it is only relevant with the physical property for irritating, and is not controlled by the subjective consciousness of people, so, this method more objectivity compared with other colour blindness detection methods.For example, the color pattern (color irritates pattern) of different brightness ratios uses red green tessellated patterns, pattern is intervally arranged by red panels and green panels and constituted.In a width chessboard grid pattern, the brightness of each red panels and size are identicals, and the brightness of green panels and size are same.Every width irritates pattern and is characterized with the ratio (red luma ratio) of pattern total brightness with total brightness red in pattern.A certain red luma than pattern as source is irritated when, the position of red color lump and green color lump need to not stop exchange with CF, so overturn and irritate pattern and irritate effect reaching.The present invention be exactly with different red lumas than color pattern is irritated to irritate measured, detection measured is to irritating the size of pattern reaction.The spectrum intensity of this frequency of pattern toggle frequency is extracted in corresponding VEP is irritated, as measured is to irritating the size that pattern reacts.It is more constant than in change procedure, keeping the total brightness (red total brightness adds green total brightness) of pattern in the red luma for irritating pattern.When the red green brightness contrast for irritating pattern is more obvious, the mankind are stronger to the reaction for irritating；When hot green brightness contrast is not obvious, the mankind are weaker to the reaction for irritating.Thus, allow measured to observe red luma and irritate pattern than the color from O to 1, find out measured and react most weak that width and irritate pattern, then the red luma of diagram case than the measured with regard to quantitatively characterizing to red and green resolution capability.As can be seen here, compare with existing like product, the present invention is entirely to be judged by objective physical property, its real result reliability, and the present invention can be made into the product of light portable.

Claims (1)

1. a kind of anerythrochloropsia quantitative analyzer, it is characterised in that be provided with detecting electrode, signal acquisition circuit, signal transacting and control module, keyboard and colorful display screen；Detecting electrode is provided with test electrode and reference electrode, test electrode signal output termination signal acquisition circuit signal input part, reference electrode signal output terminates signal acquisition circuit input, signal acquisition circuit signal output terminates signal transacting and control module input, signal transacting and control module output termination colorful display screen input, keyboard output end connect signal transacting and control module input.