CN108152175A - Imaging method heavy metal detection method based on suspension time difference - Google Patents

Imaging method heavy metal detection method based on suspension time difference Download PDF

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Publication number
CN108152175A
CN108152175A CN201711430052.2A CN201711430052A CN108152175A CN 108152175 A CN108152175 A CN 108152175A CN 201711430052 A CN201711430052 A CN 201711430052A CN 108152175 A CN108152175 A CN 108152175A
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China
Prior art keywords
heavy metal
imaging
cylinder cavity
metal particles
sample
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CN201711430052.2A
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Chinese (zh)
Inventor
沈学锋
骆文静
曹子鹏
王涛
赵再华
郑刚
陈景元
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Fourth Military Medical University FMMU
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Fourth Military Medical University FMMU
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Priority to CN201711430052.2A priority Critical patent/CN108152175A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/04Investigating sedimentation of particle suspensions

Abstract

The present invention relates to the imaging method heavy metal detection methods based on suspension time difference, include at least:Cylinder cavity, processor, LCD display and the sample room on cylinder cavity top, cylinder cavity has pure water, the cmos image sensor for having imaging lens and imaging lens imaging surface vertical with cylinder cavity, the focal distance L of imaging lens is on transparent column cavity center line, the Depth of field D of imaging lens is the width of cylinder cavity, contain heavy metal particles object sample with placing in sample room, controllable valve is arranged at sample room bottom, controllable valve is opened, enter in cylinder cavity containing heavy metal particles object sample, the timer of processor, which is opened, starts timing, heavy metal particles object suspends at the top of cylinder cavity and precipitates, heavy metal particles object and other particles with different sinking speed at the top of cylinder cavity to bottom, cmos image sensor timing acquisition different time sections image.

Description

Imaging method heavy metal detection method based on suspension time difference
Technical field
The present invention relates to metal detection technology, specifically, being to be related to the imaging method heavy metal inspection based on suspension time difference Survey method.
Background technology
Either air, soil or even drinking water all contain heavy metal, such as cause the free radical of aging, have injury to skin Particle, the dust in air, automobile exhaust etc. in addition tap water heavy metal or even some skin care item are all brought to skin such as Some heavy metal raw material such as cadmiums of milky lotion etc. and one of them.
The environmental hazard of heavy metal-polluted soil shows significant correlation with its occurrence status in the soil. Tessier and BCR chemical form continuous extractions are usually used in the morphological analysis of heavy metal-polluted soil, but respectively have quality.Someone is comprehensive The advantage of TCLP, Tessier and BCR are closed, continuous extraction method is improved, the shape of the heavy metal in soil of pH >=5.0 State is divided into four kinds of activated state, Secondary Carbonates reference state, inferior stable state and stable state forms;PH<A huge sum of money in 5.0 soil The Form division of category is activated state, inferior stable state and the third variform of stable state, and the continuous extraction after application enhancements is right As, Cu, Ni, Pb and Zn in 6 kinds of contaminated soils carry out form successive extract, acquired results and TCLP, Tessier and The analysis result of BCR is compared.The result shows that MSEP to the recovery rate of As, Cu, Ni, Pb and Zn in soil 85 ~ 115% Between, meet soil morphology analysis requirement;Each soil activation state content of beary metal extraction result leaches result with TCLP and shows Significant correlation, this method can be used for judging whether measured object is hazardous substance;Divisions of the MSEP to heavy metals formation in soil Relatively reasonable, Significance for Environment is clear and definite, and income analysis result cannot be only used for judging whether tested soil is that hazardous substance can also be The selection of administering method provides foundation.
Heavy metal in air is present in Atmospheric particulates (TSP), and grain size is less than 10 μm of airborne particulate Object (pellet PM10) the more heavy metal containing high-content.It is reported that about 75%~90% heavy metal distribution exists In PM10, and grain size is smaller, and content of beary metal is higher.Heavy metal in air contains lead, cadmium, mercury, fluorine, chlorine, bromine, iodine.
The long-term mankind lived in natural environment, have stronger adaptability for natural material.Someone analyzes people The regularity of distribution of more than 60 kinds of common elements in body finds percentage composition of wherein most elements in blood of human body and they Percentage composition in the earth's crust is very much like.But the mankind, to artificial synthesized chemical substance, tolerance is then much smaller. So the nature or artificial attribute of difference pollutant, help to estimate their extents of injury to the mankind.The weight such as lead, cadmium, mercury, arsenic Metal is the development due to industrial activity, causes the enrichment in mankind's ambient enviroment, enters people by big gas and water, food etc. Body wherein mainly entering human body by respiratory system, is accumulated by blood circulation in human body corresponding organ, causes organ different Im-pairment is detrimental to health.
The natural environment that people are lived is different, since the natural environment influence that heavy metal lives to it is different, causes Difference is accumulated in the certain organs of human body, common heavy metal analysis is only in detection and analysis sometime, long-term accumulation Quantify no means.
Metal of the relative density more than 5, referred to as heavy metal.Atomic number from 23 (V) to 92 (U) native metal element There are 60 kinds, in addition to 6 kinds therein, remaining 54 kinds relative density is both greater than 5, therefore from the meaning of relative density, this 54 kinds Metal is all heavy metal.But when carrying out element classification, wherein some belongs to rare earth metal, some has incorporated refractory metal into, Finally industrially really cut-in heavy metal is 10 kinds of metallic elements:Copper, lead, zinc, tin, nickel, cobalt, antimony, mercury, cadmium and bismuth.This 10 heavy metal species have no other special general character other than being more than 5 with metal general character and density.Each heavy metal species respectively have respectively Property.
Detection heavy metal has atomic absorption method, Differential Potentiometric Stripping Analysis with Experimental, electrode method, gas chromatography, spectrophotometric at present Method etc., though these methods are sensitive, accurate, generally existing pre-treatment is cumbersome, required instrument and equipment is expensive, detection time is longer, Detection technique requirement is high, it is difficult to it is applied to food, the field quick detection of the environmental samples such as water sample.
Invention content
The object of the present invention is to provide a kind of bases that is short, at low cost, carrying easy to use, suitable field quick detection of time In the imaging method heavy metal detection method of suspension time difference.
In order to solve the above-mentioned technical problem, the present invention is achieved by following technical solution:It is poor based on suspension time Imaging method heavy metal detection method, it is characterized in that:It includes at least:Cylinder cavity, processor, LCD display and cylinder cavity The sample room on top, cylinder cavity have pure water, the CMOS that has imaging lens and imaging lens imaging surface vertical with cylinder cavity Imaging sensor, for the focal distance L of imaging lens on transparent column cavity center line, the Depth of field D of imaging lens is round The width of column cavity, with placing containing heavy metal particles object sample, controllable valve, controllable valve are arranged at sample room bottom for sample room It opens, enters in cylinder cavity containing heavy metal particles object sample, the timer of processor, which is opened, starts timing, heavy metal particles Object suspend at the top of the cylinder cavity precipitation, heavy metal particles object and other particles with different sinking speed at the top of cylinder cavity to Bottom, cmos image sensor timing acquisition different time sections image, counterweight metal particulate and other particles carry out imaging body Product detection and time analysis, the analysing content of heavy metal particles object is shown on an lcd display.
The Depth of field D=rear the depth of field-preceding the depth of field, wherein the preceding depth of field=D δ L2/f2+ D δ L, the rear depth of field=D δ L2Before/ f2- D δ L, D are the shooting f-numbers of camera lens, and L is focal distance, and δ is that allow disperse circular diameter f be lens focus.
The cylinder cavity is the transparent body, and there is lighting source in side.
The lighting source is irradiated to the adjustable angle of the parallel cavity of the transparent body.
The lighting source brightness is adjustable.
The processor includes at least a control, and control is used for by the heavy metal particles object of different sizes and shapes The calibration object of reference correction size of establishing criteria and time of drifting along provide, and with being compared containing heavy metal particles object sample, give Go out containing whether heavy metal particles object sample contains heavy metal particles.
The width of the cylinder cavity is not counted according to imaging lens and the minimum depth of field having, so that heavy metal particles object High-frequency information be imaged on cmos image sensor.
The cmos image sensor for having three groups of imaging lens and imaging lens imaging surface vertical with cylinder cavity, three Group is mutually 120 degree.
The positive effect of the present invention is as follows:Due to metal of the relative density more than 5, referred to as heavy metal.When passing through suspension Between poor imaging method detection heavy metal, by controlling the diameter of cylinder cavity, imaging lens is enable to be imaged a huge sum of money for clear solid Belong to suspended matter, be conducive to understand Heavy Metals and shape, solid is provided for the heavy metal in scientific analysis water and soil earth or food Data information.With the time is short, at low cost, carrying is easy to use, is suitble to field quick detection.
Description of the drawings
With reference to embodiment attached drawing, the invention will be further described:
Fig. 1 is 1 structure diagram of the embodiment of the present invention;
Fig. 2 is 2 structure diagram of the embodiment of the present invention.
In figure, 1, cylinder cavity;2nd, imaging lens;3rd, cmos image sensor;4th, processor;5th, LCD display;6th, it shines Mingguang City source;7th, containing heavy metal particles object sample;8th, heavy metal particles object;9th, sample room;10th, center line;11st, controllable valve.
Specific embodiment
Embodiment 1
As shown in Figure 1, the imaging method heavy metal detection method based on suspension time difference, it is characterized in that:It includes at least:Cylinder cavity 1st, the sample room 9 on 1 top of processor 4, LCD display 5 and cylinder cavity, cylinder cavity 1 have pure water, hang down with cylinder cavity 1 The straight cmos image sensor 3 for having 2 imaging surface of imaging lens 2 and imaging lens, the focal distance L of imaging lens 2 is in transparent circle On 1 center line 10 of column cavity, the Depth of field D of imaging lens 2 is the width of cylinder cavity 1, and sample room 9 is with placing containing weight Controllable valve 11 is arranged at metal particle sample 7,9 bottom of sample room, and controllable valve 11 is opened, and contains heavy metal particles object sample 7 Into in cylinder cavity 1, the timer of processor 4, which is opened, starts timing, and heavy metal particles object 8 suspends from 1 top of cylinder cavity With different sinking speed from 1 top to bottom of cylinder cavity, cmos image senses for precipitation, heavy metal particles object 8 and other particles 3 timing acquisition different time sections image of device, counterweight metal particulate 8 and other particles carry out imaging volume detection and time point Analysis includes the analysing content of heavy metal particles object 8 on LCD display 5.
The Depth of field D=rear the depth of field-preceding the depth of field, wherein the preceding depth of field=D δ L2/f2+ D δ L, the rear depth of field=D δ L2Before/ f2- D δ L, D are the shooting f-numbers of camera lens, and L is focal distance, and δ is that allow disperse circular diameter f be lens focus.
The cylinder cavity 1 be the transparent body, there is lighting source 6 in side.
The lighting source 6 is irradiated to the adjustable angle of the parallel cavity of the transparent body.
6 brightness of lighting source is adjustable.
The processor includes at least a control, and control is used for by the heavy metal particles object of different sizes and shapes The calibration object of reference correction size of 8 establishing criterias and time of drifting along provide, and with being compared containing heavy metal particles object sample, give Go out containing whether heavy metal particles object sample contains heavy metal particles.
The width of the cylinder cavity 1 is not counted according to imaging lens 2 and the minimum depth of field having, so that heavy metal particles The high-frequency information of object 8 is imaged on cmos image sensor 3.
Embodiment 2
As shown in Fig. 2, the imaging method heavy metal detection method based on suspension time difference, it is characterized in that:It includes at least:Cylinder cavity 1st, the sample room 9 on 1 top of processor 4, LCD display 5 and cylinder cavity, cylinder cavity 1 have pure water, hang down with cylinder cavity 1 The straight cmos image sensor 3 for having 2 imaging surface of imaging lens 2 and imaging lens, 2 imaging surface of imaging lens 2 and imaging lens Cmos image sensor 3 has three groups, and 120 degree are distributed in around cylinder cavity 1, and the focal distance L of imaging lens 2 is in transparent column On 1 center line 10 of cavity, the Depth of field D of imaging lens 2 is the width of cylinder cavity 1, and sample room 9 is with placing containing a huge sum of money Controllable valve 11 is arranged at metal particles object sample 7,9 bottom of sample room, and controllable valve 11 is opened, containing heavy metal particles object sample 7 into Enter in cylinder cavity 1, the timer of processor 4, which is opened, starts timing, and it is heavy that heavy metal particles object 8 suspends from 1 top of cylinder cavity Shallow lake, heavy metal particles object 8 and other particles are with different sinking speed from 1 top of cylinder cavity to bottom, cmos image sensor 3 Timing acquisition different time sections image, counterweight metal particulate 8 and other particles carry out imaging volume detection and time analysis, will The analysing content of heavy metal particles object 8 is shown on LCD display 5.
The Depth of field D=rear the depth of field-preceding the depth of field, wherein the preceding depth of field=D δ L2/f2+ D δ L, the rear depth of field=D δ L2Before/ f2- D δ L, D are the shooting f-numbers of camera lens, and L is focal distance, and δ is that allow disperse circular diameter f be lens focus.
The cylinder cavity 1 is the transparent body, and there is lighting source 6 in side.
The lighting source 6 is irradiated to the adjustable angle of the parallel cavity of the transparent body.
6 brightness of lighting source is adjustable.
The processor includes at least a control, and control is used for by the heavy metal particles object of different sizes and shapes The calibration object of reference correction size of 8 establishing criterias and time of drifting along provide, and with being compared containing heavy metal particles object sample, give Go out containing whether heavy metal particles object sample contains heavy metal particles.
The width of the cylinder cavity 1 is not counted according to imaging lens 2 and the minimum depth of field having, so that heavy metal particles The high-frequency information of object 8 is imaged on cmos image sensor 3.

Claims (8)

1. based on the imaging method heavy metal detection method of suspension time difference, it is characterized in that:It includes at least:Cylinder cavity(1), processing Device(4), LCD display(5)With cylinder cavity(1)The sample room on top(9), cylinder cavity(1)There is pure water, with cylinder cavity (1)Vertically there are imaging lens(2)And imaging lens(2)The cmos image sensor of imaging surface(3), imaging lens(2)Focusing Distance L is in transparent column cavity(1)Center line(10)On, imaging lens(2)Depth of field D be cylinder cavity(1)Width, Sample room(9)Contain heavy metal particles object sample with placing(7), sample room(9)Controllable valve is arranged at bottom(11), controllable valve (11)It opens, contains heavy metal particles object sample(7)Into cylinder cavity(1)It is interior, processor(4)Timer start to count When, heavy metal particles object(8)From cylinder cavity(1)Top, which suspends, to be precipitated, heavy metal particles object(8)With other particles with Bu Tong heavy Reduction of speed degree is from cylinder cavity(1)Top to bottom, cmos image sensor(3)Timing acquisition different time sections image, to a huge sum of money Metal particles object(8)Imaging volume detection and time analysis are carried out with other particles, by heavy metal particles object(8)Analysing content show Show in LCD display(5)On.
2. the imaging method heavy metal detection method according to claim 1 based on suspension time difference, it is characterized in that:Described Depth of field D=rear the depth of field-preceding the depth of field, wherein the preceding depth of field=D δ L2/f2+ D δ L, the rear depth of field=D δ L2Before/f2- D δ L, D are camera lenses Shooting f-number, L is focal distance, and δ is that allow disperse circular diameter f be lens focus.
3. the imaging method heavy metal detection method according to claim 1 based on suspension time difference, it is characterized in that:Described Cylinder cavity (1) is the transparent body, and there is lighting source (6) in side.
4. the imaging method heavy metal detection method according to claim 3 based on suspension time difference, it is characterized in that:Described Lighting source(6)It is irradiated to the adjustable angle of the parallel cavity of the transparent body.
5. the imaging method heavy metal detection method according to claim 3 based on suspension time difference, it is characterized in that:Described Lighting source(6)Brightness is adjustable.
6. the imaging method heavy metal detection method according to claim 1 based on suspension time difference, it is characterized in that:Described Processor includes at least a control, and control is used for by the heavy metal particles object of different sizes and shapes(8)Establishing criteria Calibration object of reference correction size and time of drifting along provide, and with being compared containing heavy metal particles object sample, provide containing a huge sum of money Whether metal particles object sample contains heavy metal particles.
7. the imaging method heavy metal detection method according to claim 1 based on suspension time difference, it is characterized in that:Described Cylinder cavity(1)Width according to imaging lens(2)With with the minimum depth of field do not count so that heavy metal particles object(8)Height Frequency information imaging is in cmos image sensor(3)On.
8. the imaging method heavy metal detection method according to claim 1 based on suspension time difference, it is characterized in that:Described With cylinder cavity(1)Vertically there are three groups of imaging lens(2)And imaging lens(2)The cmos image sensor of imaging surface(3), three groups It is mutually 120 degree.
CN201711430052.2A 2017-12-26 2017-12-26 Imaging method heavy metal detection method based on suspension time difference Pending CN108152175A (en)

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CA2487233A1 (en) * 2003-11-10 2005-05-10 Frederick David King Method and apparatus for particle measurement employing optical imaging
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EP0507746A2 (en) * 1991-04-03 1992-10-07 Istituto Nazionale Di Ottica Method and device for measuring the particle size distribution of a flowing solid particulate substance
CA2487233A1 (en) * 2003-11-10 2005-05-10 Frederick David King Method and apparatus for particle measurement employing optical imaging
CN1932475A (en) * 2005-08-24 2007-03-21 安华高科技Ecbuip(新加坡)私人有限公司 Particle detection apparatus and particle detection method used therefor
CN101672861A (en) * 2008-09-11 2010-03-17 北京林业大学 Method and system for determining free precipitation speed of floccules/mud particles
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