CN204214772U - The portable analysis apparatus of a kind of broadband terahertz time-domain spectroscopy - Google Patents
The portable analysis apparatus of a kind of broadband terahertz time-domain spectroscopy Download PDFInfo
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- CN204214772U CN204214772U CN201420310862.XU CN201420310862U CN204214772U CN 204214772 U CN204214772 U CN 204214772U CN 201420310862 U CN201420310862 U CN 201420310862U CN 204214772 U CN204214772 U CN 204214772U
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- 238000001328 terahertz time-domain spectroscopy Methods 0.000 title claims abstract description 45
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Abstract
The utility model provides analytical approach and the portable analysis apparatus thereof of a kind of broadband terahertz time-domain spectroscopy.Described analytical approach comprises sets up broadband terahertz time-domain spectroscopy characteristic spectrum database to chemicals; Obtain the broadband terahertz time-domain spectroscopy characteristic spectrum data of testing sample, denoising and recovery are carried out to described characteristic spectrum data; The characteristic spectrum data of sample are mated with data in database.Wherein, denoising eliminates humidity to the impact of tera-hertz spectra; Eliminate echo to the impact of spectrum; Small wave converting method is utilized to carry out spectrum denoising.The utility model available standardization terahertz time-domain spectroscopy data, and adopt mancarried device to carry out on-the site analysis to data.
Description
[technical field]
The utility model relates to terahertz light analysis of spectrum, is specifically related to a kind of mancarried device analyzing broadband terahertz time-domain spectroscopy.
[background technology]
At present, broadband terahertz time-domain spectroscopy can be obtained by broadband miscellaneous terahertz time-domain spectroscopy instrument.But, actually rare to the analytical instrument of the broadband terahertz time-domain spectroscopy with unique feature.The analytical instrument of traditional broadband terahertz time-domain spectroscopy can be analyzed usually under the environment of pure nitrogen gas or rare gas protection, the tera-hertz spectra of one or more materials, and the quantum chemical method realizing often kind of content of material.But under complex environment, the analytical instrument of a kind of material especially under Real Atmosphere environment or the broadband terahertz time-domain spectroscopy of several material does not almost have.This wherein most important reason be to eliminate the interference of Real Atmosphere environment to tera-hertz spectra, cannot obtain one or more materials closely, the tera-hertz spectra of the sign tested sample characterization of molecules that records under noiseless gas condition and relative content.
[utility model content]
In order to overcome the defect of prior art, there is provided a kind of terahertz time-domain spectroscopy is carried out to denoising, recovers terahertz time-domain spectroscopy, realize the pre-service to broadband terahertz time-domain spectroscopy under complex environment, in conjunction with the spectra database collection at testing sample place, calculate the information of material that analyzed tera-hertz spectra comprises and content thereof, realize the analysis to broadband terahertz time-domain spectroscopy, and realize the mancarried device of described analytical approach.
Therefore, the utility model provides a kind of portable analysis apparatus realizing said method, comprise shell, the single-chip microcomputer be arranged in shell, the communication interface be connected with described single-chip microcomputer, touch screen LCDs, button and ROM storer, SD draw-in groove, also comprise the first memory for solidifying described chemicals characteristic spectrum database and corresponding matching process thereof, for storing second memory, the environmental parameter detection system of spectroscopic data and result of calculation; Described environmental parameter detection system comprises the control circuit that temperature sensor, humidity sensor, 100 micron particles substrate concentration sensors and all described sensors are connected with described single-chip microcomputer.
Preferably, first memory and second memory are SD cards.
In the utility model, communication interface receives the broadband terahertz time-domain spectroscopy data of the testing sample that other equipment transmits; Described terahertz time-domain spectroscopy data are ascii text files; Described ascii text file is stored in described SD card 2.
In the utility model, described SD card has one or more, and be SD card that can not write, that be solidified with not erasable spectra database and algorithm data, each compounds correspond to a SD card, or described SD card is the SD card that can write.
Preferably, have environmentally that damp condition determination humidity environment is on the impact of spectroscopic data in described ROM storer, under obtaining described environment, humidity is to the absorption spectra of Terahertz, the device of the tera-hertz spectra of the testing sample of the humidity effect that has been eliminated.
Have in described ROM storer and detect in terahertz time-domain spectroscopy data whether there is echo, if existed, then compared the amplitude-frequency spectrum obtaining echo by main ripple and echo; Again according to phase frequency spectrum, obtain the time interval of echo and main ripple, eliminate echo to the impact of spectrum; If detect in terahertz time-domain spectroscopy and contain multiple echo, then carry out the device of multi-level Echo cancellation.
Described analytical equipment has the device characteristic spectrum data of testing sample and the data in first memory being carried out mating.
In the utility model, shell is inlayed described touch screen LCDs, communication interface, button, 2 SD draw-in grooves, ROM storer, the single-chip microcomputer described in the embedding of bottom of shell, enclosure fixed environment parameter detection system; Described button comprises " on ", D score set direction button and " confirmation " button, for selecting read in spectroscopic data file; Described communication interface is USB general-purpose interface, serial ports or wireless receiving interface.
Touch screen LCDs controls by the graphical interfaces built-in function of ARM single-chip microcomputer and the liquid crystal display connecting circuit of ARM single-chip microcomputer, broadband terahertz time-domain spectroscopy figure, the spectral data analysis result of Water demand can be shown, also may be used for handling reading in and writing of select File data.
Single-chip microcomputer can according to the needs of user, the data of the spectra database read in and corresponding matching algorithm thereof are stored in inside described ROM, after calculating and mating, the most all spectra databases of user's needs and the data of corresponding matching algorithm thereof write in first memory.
First memory and second memory can adopt SD card.
Described communication interface receives the broadband terahertz time-domain spectroscopy data of the testing sample that other equipment transmits; The described terahertz time-domain spectroscopy data ascii text file that to be suffix be " .thz "; Described ascii text file is stored in SD card 2.
The spectroscopic data comprised in ascii text file is passed in described single-chip microcomputer; Single-chip microcomputer reads the algorithm being used for denoising, recovery from ROM storer, reads spectroscopic data and matching algorithm, and calculate spectroscopic data from SD card 1, the result calculating gained is stored in SD card 2.
Described SD card has one or more, and can be SD card that can not write, that be solidified with not erasable spectra database and algorithm data, each compounds correspond to a SD card, or described SD card is the SD card that can write.All SD cards 1 should have for the encryption communication key with described single chip communication, so that SD card 1 can be read by described single-chip microcomputer.
Have in described ROM storer environmentally that damp condition determination humidity environment is on the impact of spectroscopic data, under obtaining described environment, humidity is to the absorption spectra of Terahertz, the device of the tera-hertz spectra of the testing sample of the humidity effect that has been eliminated.
Have in described ROM storer and detect in terahertz time-domain spectroscopy data whether there is echo, if existed, then compared the amplitude-frequency spectrum obtaining echo by main ripple and echo; Again according to phase frequency spectrum, obtain the time interval of echo and main ripple, utilize the Deconvolution Algorithm Based on Frequency or additive method elimination echo of removing antenna echo on the impact of spectrum; If detect that analytical equipment described in terahertz time-domain spectroscopy has the device characteristic spectrum data of testing sample and the data in first memory being carried out mating.
Mancarried device of the present utility model, by general data-interface, can accept the standardization terahertz time-domain spectroscopy data obtained measured by any terahertz time-domain spectroscopy instrument, and carry out on-the site analysis to data.Under the prerequisite of structural system not destroying original terahertz time-domain spectroscopy instrument, exchange data by the mode of wired or radio communication and terahertz time-domain spectroscopy instrument; This device inside embeds the preprocess method to spectrum, even by atmospheric environment, especially water vapor, disturb stronger terahertz time-domain spectroscopy, also recover not by the spectral signature of atmospheric environment interference by Preprocessing Algorithm, therefore have stronger adaptive capacity to environment.
In addition, user also according to the needs of oneself, can select database SD card 1 voluntarily, also from the database SD card 1 needed for edlin, can improve this analysis device to the dirigibility of data processing.
Due to the terahertz time-domain spectroscopy data of all substances need not be deposited in device, the data that can analyze of device and upgrading along with the renewal of data in SD card 1, device also can upgrade along with the renewal of algorithm in SD card 1 analytical algorithm of spectrum, greatly improves serviceable life and the usable range of device.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the analytical equipment of embodiment 1, wherein 1-shell, 2-button, 3-touch screen LCDs, 4-wireless antenna, 5-USB interface, 6-SD card 1 draw-in groove, 7-SD card 2 draw-in groove, 8-serial ports, 9-environmental parameter detection system (comprising temperature sensor, humidity sensor, 100 micron particles thing density sensors), 10-single-chip microcomputer, 11-microcomputer development circuit board.
Fig. 2 is device calculation flow chart.
Fig. 3 is according to user's request, the process flow diagram of design SD card 1.
[embodiment]
Following examples are used for explaining the technical solution of the utility model without limitation.
Embodiment 1
Portable analysis apparatus as shown in Figure 1, comprises shell, case, display screen, antenna, USB interface, multiple SD draw-in groove, single-chip microcomputer and development board thereof, the connection of these assemblies and specifically arrange and all belong to the state of the art, does not therefore repeat.
Environmental parameter detection system comprises the temperature sensor be arranged on housing, humidity sensor and 100 micron particles thing density sensors.
Because terahertz time-domain spectroscopy instrument has the feature of high resolving power, high s/n ratio, but in communication process, be easily subject to atmospheric environment (especially water vapor) absorb and decay, with the Terahertz absorption line of the tera-hertz spectra meeting hybrid atmospheric of the material measured by terahertz time-domain spectroscopy instrument, signal to noise ratio (S/N ratio) also can reduce, thus the tera-hertz spectra of surveyed material itself cannot be differentiated.
Treat test sample product with spectrometer to measure, exported data and be input in this device by data-interface.This device, by obtaining environmental parameter, eliminates environmental parameter to the impact of spectroscopic data, obtain not containing atmospheric interference, compared with the tera-hertz spectra of high s/n ratio, thus provide possibility for the reliable utilization of the tera-hertz spectra recorded in atmospheric environment.And then the database that may belong to according to measured matter and accordingly can only matching algorithm, the material that just spectrum can be comprised composition and relative content identify, to realize the on-the site analysis to broadband terahertz time-domain spectroscopy.
First, open this mancarried device, insert SD card 2, then the spectroscopic data that selection will be analyzed.If spectroscopic data is in SD card 2, then can directly call this data analysis; If spectroscopic data is not stored in SD card 2, then can selects whether to set up wireless connections with spectral measuring devices or other data storage devices, also can select to read data the movable storage device be connected into from USB or serial ports.Then by " on ", D score and " confirmations " button, select the concrete file that need read in, liquid crystal display can draw automatically by the overall picture of selection spectroscopic data.
Reading after data, by being solidified with in SD card 1 insertion apparatus of database that spectroscopic data may belong to and matching algorithm thereof, then clicking " starting to identify " button occurred in screen.Now, single-chip microcomputer will start to carry out pre-service to target optical spectrum by the environmental data that provides of combining environmental parameter detection system, then carries out match cognization in conjunction with the data in SD card 1 and algorithm to target optical spectrum.
If user thinks to set up spectra database voluntarily, then need the SD card 1 inserted respectively belonging to required spectroscopic data, and corresponding data are read in ROM.Continue after taking all spectroscopic datas, the match cognization algorithm automatic generation function that selective system provides, generates corresponding matching algorithm.And then insert new SD card 1, be somebody's turn to do and select import feature.Allly all will to be write direct in this SD card 1, so user can use this SD card 1 by the spectrum selected and corresponding matching algorithm.
Finally, all match cognization results all will be stored in SD card 2, select to read match cognization result and this result can be made to be presented in touch screen LCDs.User can select to take out this general SD card 2 and carry out digital independent, also data can be turned back on other visualized data display devices by wireless or restricted communication mode.
Analytical approach belongs to the state of the art, such as, comprises the following steps the spectral data analysis of testing sample:
Step 1.1: call water vapor elimination algorithm, in conjunction with surveyed environmental data, judges to ambient humidity residing during spectral measurement, under reconstructing this environment, water vapor is to the absorption spectra of Terahertz; Utilize the correlation technique of deconvolution and signal transacting, in elimination environment, water vapor is to the inhalation effects of tera-hertz spectra, and suitably improves the signal to noise ratio (S/N ratio) of spectrum.
Step 1.2: detect in terahertz time-domain spectroscopy data whether there is echo, if existed, then compares the amplitude-frequency spectrum obtaining echo by main ripple and echo; Again according to phase frequency spectrum, calculate the time interval of echo and main ripple, and then utilize the Deconvolution Algorithm Based on Frequency of similar removal antenna echo, eliminate echo to the impact of spectrum; If detect in terahertz time-domain spectroscopy and contain multiple echo, then call multi-level echo cancellation algorithms and process.
Step 1.3: utilize small wave converting method, in conjunction with surveyed ambient particle thing density data, wavelet decomposition is carried out to spectrum, the Wavelet Component containing baseline wander and high frequency noise is cast out, recover spectrum by remaining Wavelet Component, thus realize the denoising of spectrum.
Mancarried device as claimed in claim 1, it is characterized in that, described a certain class chemicals characteristic spectrum database comprises: a class chemicals is as oil, medicinal material, drugs, or a certain class chemicals that user specifies, after process, entirely compose with the broadband terahertz time-domain spectroscopy of obvious characteristic absorption peak; Described matching algorithm comprises the steps:
Step 2.1: judge the chemical composition of tera-hertz spectra analyzed whether in spectra database; This judgement according to the sample in spectra database and outside spectra database, will be set up sorter, and calculates the correlation parameter in sorter.If the sample in spectra database, then exporting is 1, otherwise is-1.
Step 2.2: judge the concrete chemical composition of the tera-hertz spectra analyzed and corresponding content; This judgement is divided into two kinds of situations: if the sample in spectra database is less, then precondition be applicable to well neural network that mix ingredients judges (can the prior art such as Chen Ming of reference. (2013) .MATLAB neural networks principles is separated with example is smart. Beijing: publishing house of Tsing-Hua University, 246-249.), spectroscopic data is substituted in neural network obtain Output rusults; If the sample in spectra database is more, then by the identification of spectrum or the identification of second derivative spectra, find out all characteristic absorption peaks in spectrum, and bring back in spectra database and judge possible material composition.Then utilize difference spectrum technology, mate the content of each compound one by one and leave out corresponding composition spectrum is affected, finally obtain the compound spectra of one-component and corresponding percentage composition.
Therefore, device of the present utility model available standardization terahertz time-domain spectroscopy data, and on-the site analysis is carried out to data.Under the prerequisite of structural system not destroying original terahertz time-domain spectroscopy instrument, exchange data by the mode of wired or radio communication and terahertz time-domain spectroscopy instrument; This device inside embeds the preprocess method to spectrum, even by atmospheric environment, especially water vapor, disturb stronger terahertz time-domain spectroscopy, also recover not by the spectral signature of atmospheric environment interference by Preprocessing Algorithm, therefore have stronger adaptive capacity to environment.
Claims (7)
1. the portable analysis apparatus of a broadband terahertz time-domain spectroscopy, comprise shell, the single-chip microcomputer be arranged in shell, the communication interface be connected with described single-chip microcomputer, touch screen LCDs, button and ROM storer, SD draw-in groove, it is characterized in that described device also comprises for the first memory of curing chemistry product characteristic spectrum database and corresponding matching process thereof, for storing second memory, the environmental parameter detection system of spectroscopic data and result of calculation; Described environmental parameter detection system comprises the control circuit that temperature sensor, humidity sensor, 100 micron particles substrate concentration sensors and all described sensors are connected with described single-chip microcomputer.
2. analytical equipment according to claim 1, is characterized in that first memory and second memory are SD cards.
3. analytical equipment according to claim 1, is characterized in that described communication interface receives the broadband terahertz time-domain spectroscopy data of the testing sample that other equipment transmits.
4. analytical equipment according to claim 2, it is characterized in that described SD card has one or more, be SD card that can not write, that be solidified with not erasable spectra database and algorithm data, each compounds correspond to a SD card, or described SD card is the SD card that can write.
5. analytical equipment according to claim 1, it is characterized in that having in described ROM storer environmentally damp condition determination humidity environment on the impact of spectroscopic data, under obtaining described environment, humidity is to the absorption spectra of Terahertz, the device of the tera-hertz spectra of the testing sample of the humidity effect that has been eliminated.
6. analytical equipment according to claim 1, is characterized in that having in described ROM storer to detect in terahertz time-domain spectroscopy data whether there is echo, if existed, is then compared the amplitude-frequency spectrum obtaining echo by main ripple and echo; Again according to phase frequency spectrum, obtain the time interval of echo and main ripple, eliminate echo to the impact of spectrum; If detect in terahertz time-domain spectroscopy and contain multiple echo, then carry out the device of multi-level Echo cancellation.
7. analytical equipment according to claim 1, is characterized in that described analytical equipment has the device characteristic spectrum data of testing sample and the data in first memory being carried out mating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420310862.XU CN204214772U (en) | 2014-06-12 | 2014-06-12 | The portable analysis apparatus of a kind of broadband terahertz time-domain spectroscopy |
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| CN201420310862.XU CN204214772U (en) | 2014-06-12 | 2014-06-12 | The portable analysis apparatus of a kind of broadband terahertz time-domain spectroscopy |
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