CN207198086U - A kind of trace element detection device - Google Patents
A kind of trace element detection device Download PDFInfo
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- CN207198086U CN207198086U CN201720938709.5U CN201720938709U CN207198086U CN 207198086 U CN207198086 U CN 207198086U CN 201720938709 U CN201720938709 U CN 201720938709U CN 207198086 U CN207198086 U CN 207198086U
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Abstract
This application discloses a kind of trace element detection device, including：Three electrode sensors of the voltage signal changed over time are detected using potentiometric stripping analysis principle to sample reagent；It is connected with three electrode sensors, performing signal condition to voltage signal operates to obtain the signal conditioning circuit of conditioned signal；It is connected with signal conditioning circuit, the conditioned signal collected is analyzed according to the LabVIEW programs compiled, and send the embedded development platform NI MyRIO of analysis result；It is connected with embedded development platform NI MyRIO, issues program and receive the LabVIEW development platforms of analysis result.Trace element detection device composition structure understands, step operation is simple clear, data acquisition faster and species and content detection is more accurate, significantly improve detection efficiency.
Description
Technical field
The application is related to content detection technical field, more particularly to a kind of trace element detection device.
Background technology
With the quickening of social life rhythm, people increasingly pay attention to the research to human life health.Theoretical proof, people
Whether the content of trace element, which maintains a normal level, in vivo can timely and accurately reflect the health status of body, because
This exploitation to trace element detector device in recent years has turned into the focus of some companies.In addition, trace element detection is also extensive
Applied to scientific domains such as environment measuring, food analysis, biomaterials.The easy trace element easy-to-use, analysis precision is high of exploitation
Detection method and corresponding device have important practical value.
The method for being presently available for trace element detection is very various, sorts out and finds mainly to include：It is radiometric analysis, each
Kind spectrum and Method of Energy Spectrum Analysis, red, orange, green, blue, yellow (ROGBY), electrochemical methods, and combine the text class programming languages such as VB or C++ and write
Micro- virtual test system software, these language not only sentence it is complicated, it is inflexible find it difficult to learn, and the requirement to sentence is tight
Lattice, it is difficult to design human-computer interaction interface attractive in appearance, it has not been convenient to which user considers real work place demand and changed on interface
Operational order and style.
So how to provide, a kind of operating procedure is less, trace element detection is more accurate and combines figure intuitive and easy to learn
Changing programming language and data acquisition is faster, without the trace element detection device of the embedded development platform of complicated debugging process
Those skilled in the art's urgent problem to be solved.
Utility model content
The purpose of the application is to provide a kind of trace element detection device, and its composition structure understands, step operation is simply clear
Clear, data acquisition is faster and species and content detection is more accurate, significantly improves detection efficiency.
In order to solve the above technical problems, the application provides a kind of trace element detection device, the trace element detection device
Including：
The voltage signal changed over time is detected using potentiometric stripping analysis principle to sample reagent
Three electrode sensors；
It is connected with three electrode sensor, performing signal condition to the voltage signal operates to obtain the letter of conditioned signal
Number modulate circuit；
It is connected with the signal conditioning circuit, the conditioned signal collected is entered according to the LabVIEW programs compiled
Row analysis, and send the embedded development platform NI MyRIO of analysis result；
It is connected with the embedded development platform NI MyRIO, issues described program and receive the analysis result
LabVIEW development platforms.
Optionally, three electrode sensor specifically includes working electrode, reference electrode and to electrode.
Optionally, the signal conditioning circuit includes：
1 is carried out to the voltage signal:1 follows amplification to be amplified the voltage follower of signal；
It is connected with the voltage follower, attenuation processing is performed to the amplified signal, obtains the electricity of the conditioned signal
Press attenuator；Wherein, the voltage range of the conditioned signal is 0 to 2.5V.
Optionally, the trace element detection device also includes：
It is connected with the LabVIEW development platforms, inputs the message input device of peripheral operation information.
Optionally, the trace element detection device also includes：
It is connected with the LabVIEW development platforms and described information input unit, the conditioned signal, described outer is presented
The display device of portion's operation information and the analysis result.
Optionally, the embedded development platform NI MyRIO pass through USB interface and the LabVIEW development platforms phase
Even.
Optionally, the embedded development platform NI MyRIO are specially NI MyRIO -1900.
A kind of trace element detection device provided herein, including：Potentiometric stripping point is utilized to sample reagent
Analysis principle is detected three electrode sensors of the voltage signal changed over time；It is connected with three electrode sensor,
Signal condition is performed to the voltage signal to operate to obtain the signal conditioning circuit of conditioned signal；With the signal conditioning circuit phase
Even, the conditioned signal collected is analyzed according to the LabVIEW programs compiled, and sends the embedded of analysis result
Development platform NI MyRIO；It is connected with the embedded development platform NI MyRIO, issues described program and receive the analysis
As a result LabVIEW development platforms.
Obviously, technical scheme provided herein, the anaplasia at any time of determinand is obtained first with three electrode sensors
The voltage signal of change, and conditioning operation is carried out to the voltage signal using signal conditioning circuit, so that it can be by follow-up embedding
Enter formula development platform NI MyRIO and LabVIEW development platforms to be analyzed, finally give analysis result.The trace element detection
Device composition structure understands, step operation is simple clear, data acquisition faster and species and content detection is more accurate, can
Significantly improve detection efficiency.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of application, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
A kind of structured flowchart for trace element detection device that Fig. 1 is provided by the embodiment of the present application；
The structured flowchart for another trace element detection device that Fig. 2 is provided by the embodiment of the present application；
The structural representation of three electrode sensors in a kind of trace element detection device that Fig. 3 is provided by the embodiment of the present application
Figure.
Embodiment
The core of the application is to provide a kind of trace element detection device, and its composition structure understands, step operation is simply clear
Clear, data acquisition is faster and species and content detection is more accurate, can significantly improve detection efficiency.
To make the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In accompanying drawing, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art
The all other embodiment obtained under the premise of creative work is not made, belong to the scope of the application protection.
Below in conjunction with Fig. 1 and Fig. 2, a kind of structure for trace element detection device that Fig. 1 is provided by the embodiment of the present application
Block diagram；The structured flowchart for another trace element detection device that Fig. 2 is provided by the embodiment of the present application.
The trace element detection device can specifically include：
The voltage signal changed over time is detected using potentiometric stripping analysis principle to sample reagent
Three electrode sensors 100；
Three electrode sensors 100 detect to sample reagent, after a series of detections and analysis process, finally
Obtain a voltage signal with time change.Wherein, why to obtain a voltage signal changed over time, be because
Compared to current signal, voltage signal is not easy to decay and is more easy to carry out various such as signal condition operations in subsequent processes
Etc. similar operations.
Wherein, various trace elements to be measured are included in the sample reagent, it is molten using current potential to sample reagent
Go out analysis principle and detected the voltage signal changed over time, why be three electrode sensors, be because compared to
Two traditional electromechanical transducers, apply control voltage on the electrode of working electrode 110 and reference electrode 120 so that the detected sample
Reduction reaction occurs for product reagent, stops the control being applied on working electrode 110 and reference electrode 120 after the completion of reaction to be restored
Voltage so that the and then sample reagent occurs oxidation reaction and generates element ion to be measured.
And in the process, meeting reaction of formation electric current on working electrode 110, but during being reacted but not
It is adapted to export the kinetic current from the working electrode for be applied with control voltage, thus it is extra electric using add the 3rd electrode three
Pole sensor, that is, utilize and electrode 130 is exported the kinetic current, the kinetic current is not only alleviated to the pressure of working electrode
Power, also it is effectively guaranteed being normally carried out for reduction reaction and oxidation reaction.
It is connected with three electrode sensors 100, signal condition is performed to voltage signal and operates to obtain the signal tune of conditioned signal
Manage circuit 200；
Signal condition operation is performed to the obtained voltage signal changed over time, it is intended to which obtaining can be in subsequent treatment mistake
The conditioned signal that can be directly used in journey.
The specific signal condition that how to perform operates, varied in a manner of obtaining the conditioned signal.Why need
Signal condition operation is performed to the voltage signal, be because the obtained voltage signal can not meet it is provided herein this
The embedded development platform NI MyRIO 300 for receiving and being handled in method for detecting microelements requirement is not, it is necessary to from being inconsistent
Close desired voltage signal and be converted to satisfactory voltage signal, so this conversion regime also can specifically will with rear end
Ask and produce variation, herein and be not specifically limited, even fixed meet wanting for embedded development platform NI MyRIO 300
Ask, the mode of its signal condition can also have a variety of modes.
It is connected with signal conditioning circuit 200, the conditioned signal collected is divided according to the LabVIEW programs compiled
Analysis, and send the embedded development platform NI MyRIO 300 of analysis result；
It is connected with embedded development platform NI MyRIO 300, issues program and receive the LabVIEW exploitations of analysis result
Platform 400.
In the conditioning letter for obtaining meeting the requirements of embedded development platform NI MyRIO 300 after signal conditioning circuit
After number, conditioned signal is analyzed using embedded development platform NI MyRIO 300 and LabVIEW development platforms 400,
Obtain trace element analysis result.
Specifically, LabVIEW development platforms 400, which are one kind, is based on patterned programming language, it is different from traditional on the market
The text class programming language such as VB or C++ of use, text class programming language not only sentence it is complicated, it is inflexible find it difficult to learn, and to sentence
Requirement it is strict, it is difficult to design human-computer interaction interface attractive in appearance, it has not been convenient to user consider real work place demand and change
Operational order and style on interface, the graphical programming language have the characteristics of easy to learn, naturally directly perceived, it is powerful to rely on its
Function be widely used to test measurement, Industry Control, analog simulation, quickly develop etc. field.
And for the problems such as general data capture card acquisition rate is low, debugging driving is complicated, one kind that NI companies are proposed
Embedded development platform NI MyRIO 300, not only can be with the correlation function of data acquisition card, and its built-in ARM processing
Utensil has real-time sexual function.NI MyRIO projects can be developed directly in LabVIEW simultaneously, pass through USB wired modes or nothing
Embedded development platform NI MyRIO 300 are connected by line mode with host computer.
In other words, as compiled using LabVIEW development platforms 400 for embedded development platform NI MyRIO 300
One control program, and embedded development platform NI MyRIO 300 according to the control program come to the conditioned signal collected
Analyzed and handled, to finally give trace element analysis result.
Wherein, three electrode sensors 100 specifically include working electrode 110, reference electrode 120 and to electrodes 130.
Concrete application mode is as follows：
First to control voltage is applied between working electrode 110 and reference electrode 120, i.e., by with to sample reagent
It is middle to be powered to promote sample reagent that reduction reaction occurs.The essence of reduction reaction and oxidation reaction is that oxidation number changes,
I.e. electronics has transfer.Oxidation number raises, i.e. the reaction of betatopic is oxidation reaction；Oxidation number reduces, and the reaction for obtaining electronics is also
Original reaction.Reduction reaction is exactly that material (molecule, atom or ion) obtains electronics or electronics to partially near reaction.
Promote the tested metal ion in sample reagent that reduction reaction occurs using the control voltage of application, so that by
Thing metal ion generation amalgam is surveyed to be enriched on reference electrode 120.
By way of energization, can make originally will not abiogenous reduction reaction promote its progress by force because be powered
In electric current essence be exactly a large amount of electronics movement, and a large amount of electronegative electronics is passed through in sample reagent, can be caused each
Kind positively charged treats that reduction reaction occurs for measured ion, i.e., obtains free electron from free ionic condition, it is become from free state
When being separated out for simple substance, and containing various trace elements in sample reagent, in the case of conditions permit, it may occur that each simple substance
Be mutually combined generation alloy phenomenon, and generate which kind of alloy can with reference electrode 120 select material it is relevant.
And first with reproducibility, strong ion is reacted for the guild of entering of reduction reaction, i.e., according to each metal ion reproducibility
Power so that the strong metal ion of reproducibility preferentially obtains free electron, makes it that reduction reaction preferentially occur.
Carry out fully, making measured object metal ion generation amalgam be enriched in around reference electrode 120 in reduction reaction,
The now control voltage by stopping being applied on working electrode 110 and reference electrode 120 so that the sample reagent is in
Serious unbalanced state, this state can cause spontaneous carry out oxidation reaction, so that amalgam regenerates measured object metal
Ion.It is consistent with reduction reaction, and the strong simple substance of oxidisability first occurs oxidation reaction and generates corresponding metal ion.
Because the inevitably reaction of formation electric current in reduction reaction and oxidation reaction process, this kinetic current with
The two reactions are closely related, especially with last oxidation reaction process, the dissolution time of each determinand metal ion into
The concentration of the metal ion is proportional, and the spike potential of the kinetic current is relevant with the ionic nature of different metal ions,
This is that the basis of quantitative and qualitative analysis is subsequently being carried out to the trace element in sample reagent.
Because during the course of the reaction can be but uncomfortable during being reacted in working electrode 110 into kinetic current
Close from being applied with the working electrode 110 of the control voltage kinetic current, therefore additionally utilize the 3rd electrode, that is, utilize to electrode 130
Induced current is exported, and the kinetic current is not only alleviated to the pressure of working electrode, is also effectively guaranteed reduction reaction and oxidation
Reaction is normally carried out.
Finally, conversion operation is performed to the kinetic current, to obtain a required voltage signal changed over time.It
So can be that this is anti-as being described according to before by kinetic current by being converted to the voltage signal changed over time
Induced current is inherently related with dissolution time.
Further, in a kind of micro- detection method provided incorporated by reference to Fig. 3, Fig. 3 by the embodiment of the present application
The structural representation of used three electrode sensor.Three electrode sensors 100 that the present embodiment uses, have selected glass carbon respectively
The working electrode of material, the reference electrode of calomel material and alloy platinum material to electrode, naturally it is also possible to using other suitable
Material reaches same purpose, herein and is not specifically limited, but these three materials above-mentioned are by being effect during test
Preferably a kind of combination of fruit, can make most suitable selection according to actual conditions Binding experiment cost.
Wherein, signal conditioning circuit 200 can include：
1 is carried out to voltage signal:1 follows amplification to be amplified the voltage follower 210 of signal；
It is connected with voltage follower, attenuation processing is performed to amplified signal, obtains the voltage attenuator 220 of conditioned signal；
Wherein, the voltage range of conditioned signal is 0 to 2.5V.
1 is carried out to the voltage signal that this is changed over time respectively:1 follows amplification and signal attenuation operation, so that final
The conditioned signal arrived is in 0 to 2.5V voltage range.Meet this desired conditioned signal be meet it is follow-up embedded
The processing requirements of development platform NI MyRIO 300.
Further, the trace element detection device also includes：
It is connected with LabVIEW development platforms 400, inputs the message input device of peripheral operation information.
The message input device manifestation mode is varied, such as：External keyboard, mouse or even touch display screen etc.,
I.e. all equipment that can be used for into row information input may be by, and herein and be not specifically limited.
Further, the trace element detection device also includes：
Be connected with LabVIEW development platforms 400 and message input device, present conditioned signal, peripheral operation information with
And the display device of analysis result.
The display device equally exists many forms of expression, such as projection, display, web browser and other forms
Can imaging unit, the category of display device can be included, herein and be not specifically limited, should be got off depending on actual conditions accordingly
Selection.
Wherein, embedded development platform NI MyRIO 300 are connected by USB interface with LabVIEW development platforms 400.
It is of course also possible to wirelessly come realize connection, herein simply enumerated it is a kind of be relatively easy to realize
Mode, and be not specifically limited.
Wherein, embedded development platform NI MyRIO 300 are specially NI MyRIO -1900.
Based on above-mentioned technical proposal, a kind of trace element detection device of the embodiment of the present application offer, first with three electricity
Pole sensor 100 obtains the caused kinetic current in reduction reaction, oxidation reaction process successively occur for metal ion to be measured, and
The voltage signal changed over time being converted to, then signal condition is carried out using signal conditioning circuit to the voltage signal, with
It is set to be analyzed by follow-up embedded development platform NI MyRIO 300 and LabVIEW development platforms 400, final
To analysis result.The trace element detection device operating procedure is less, easier, data acquisition faster and species and content inspection
Survey is more accurate, can significantly improve detection efficiency.
Embodiment two.
The present embodiment is that the description above content is applied in following one specific trace element detection step：
Step 1：Sample reagent is detected the voltage signal of dissolution by three electrode sensors.
Here it is based on differetial-potential stripping analysis principle：
It is " electrodeposition " first, i.e., adds constant potential on the working electrode (s, stirring motor spin even faster sample reagent
Reduction reaction so that metal ion reduction generation amalgam to be measured is enriched with electrode；The constant potential on working electrode is disconnected later,
Oxidation occurs for sample reagent so that amalgam is reoxidized into metal ion, i.e. " dissolution ".Known dissolution time τ with
Treat that the concentration of measured ion is directly proportional, spike potential is relevant with ionic nature, and this is the base that quantitative and qualitative analysis is carried out to element to be measured
Plinth.
Three electrode sensors, its working electrode select glass-carbon electrode, and platinum electrode is selected to electrode, and reference motor selects calomel
Electrode.In order to prevent parasitic signal from disturbing, working electrode is grounded, the precision and stability of voltage signal in circuit can be improved.
Step 2：The signal output part of three electrode sensors and the signal input part of signal conditioning circuit connect, to three electricity
The voltage signal of pole sensor detection is nursed one's health.
The voltage signal of three electrode sensors detection is simultaneously unsatisfactory for the requirement directly gathered with data collecting card, passes through signal
Modulate circuit is handled it.1 is carried out to voltage signal using voltage follower:1 follows amplification, and is made by attenuator
It is decayed in the range of 0-2.5V.
Step 3：The signal output part of signal conditioning circuit inputs with embedded development platform NI MyRIO difference analogue
End connection, is acquired to conditioned voltage signal.NI MyRIO provide 2 difference analogue inputs, positioned at C-terminal mouth
(MSP) in, one of them is selected.
Step 4：Embedded development platform NI MyRIO are by USB data line with having the upper of LabVIEW development platforms
Machine connects.
NI MyRIO projects are developed first on LabVIEW, design corresponding data processor；Then will be compiled
Download program is deployed in the arm processor on the onboard chips of embedded development platform NI MyRIO operation and handled, by with
The host computer of LabVIEW development platforms carries out real-time display to the data of processing, and designs the man-machine interactively interface of close friend.
By foregoing description content, the advantages of can substantially obtaining trace element detection device provided herein：Point
High sensitivity is analysed, than general high 4~6 orders of magnitude of test system for using polarography principle：Use patterned programming language
LabVIEW, programing work amount is greatly reduced, facilitate user according to the self-defined man-machine interactively interface of actual conditions；Use insertion
Formula development platform NI MyRIO, safe, portable, acquisition rate is high；Fully combine and played the excellent of LabVIEW and NI MyRIO
Point, the system operatio is simple, and accuracy of detection is high.
Each embodiment is described by the way of progressive in specification, and what each embodiment stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think to exceed scope of the present application.
Specific case used herein is set forth to the principle and embodiment of the application, and above example is said
It is bright to be only intended to help and understand the present processes and its core concept.It should be pointed out that the ordinary skill for the art
For personnel, on the premise of the application principle is not departed from, some improvement and modification, these improvement can also be carried out to the application
Also fallen into modification in the application scope of the claims.
It should also be noted that, in this manual, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except other identical element in the process including key element, method, article or equipment being also present.
Claims (7)
- A kind of 1. trace element detection device, it is characterised in that including：Three electricity of the voltage signal changed over time are detected using potentiometric stripping analysis principle to sample reagent Pole sensor；It is connected with three electrode sensor, signal condition is performed to the voltage signal and operates to obtain the signal tune of conditioned signal Manage circuit；It is connected with the signal conditioning circuit, the conditioned signal collected is divided according to the LabVIEW programs compiled Analysis, and send the embedded development platform NI MyRIO of analysis result；It is connected with the embedded development platform NI MyRIO, issues described program and receive the LabVIEW of the analysis result Development platform.
- 2. trace element detection device according to claim 1, it is characterised in that three electrode sensor specifically includes Working electrode, reference electrode and to electrode.
- 3. trace element detection device according to claim 2, it is characterised in that the signal conditioning circuit includes：1 is carried out to the voltage signal:1 follows amplification to be amplified the voltage follower of signal；It is connected with the voltage follower, attenuation processing is performed to the amplified signal, the voltage for obtaining the conditioned signal declines Subtract device；Wherein, the voltage range of the conditioned signal is 0 to 2.5V.
- 4. trace element detection device according to claim 3, it is characterised in that also include：It is connected with the LabVIEW development platforms, inputs the message input device of peripheral operation information.
- 5. trace element detection device according to claim 4, it is characterised in that also include：It is connected with the LabVIEW development platforms and described information input unit, the conditioned signal, the outside behaviour is presented Make the display device of information and the analysis result.
- 6. trace element detection device according to claim 5, it is characterised in that the embedded development platform NI MyRIO is connected by USB interface with the LabVIEW development platforms.
- 7. the trace element detection device according to any one of claim 1 to 6, it is characterised in that the embedded development Platform NI MyRIO are specially NI MyRIO -1900.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247084A (en) * | 2017-07-28 | 2017-10-13 | 广东工业大学 | A kind of micro- detection method and trace element detection device |
| CN111198164A (en) * | 2020-01-09 | 2020-05-26 | 广州齐力生物技术有限公司 | Trace element detection method and trace element detector |
-
2017
- 2017-07-28 CN CN201720938709.5U patent/CN207198086U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247084A (en) * | 2017-07-28 | 2017-10-13 | 广东工业大学 | A kind of micro- detection method and trace element detection device |
| CN111198164A (en) * | 2020-01-09 | 2020-05-26 | 广州齐力生物技术有限公司 | Trace element detection method and trace element detector |
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