CN202041456U - Liquid sample holder applicable to terahertz time domain spectral measurement - Google Patents
Liquid sample holder applicable to terahertz time domain spectral measurement Download PDFInfo
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- CN202041456U CN202041456U CN2011200419055U CN201120041905U CN202041456U CN 202041456 U CN202041456 U CN 202041456U CN 2011200419055 U CN2011200419055 U CN 2011200419055U CN 201120041905 U CN201120041905 U CN 201120041905U CN 202041456 U CN202041456 U CN 202041456U
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Abstract
The utility model discloses a liquid sample holder applicable to terahertz time domain spectral measurement, which comprises two sample clamp sheets, a optical distance regulating mechanism, a base and a moving mechanism, wherein the two sample clamp sheets are parallelly arranged and used for clamping sample bags, a plurality of windows are arranged on the sample clamp sheets, the optical distance regulating mechanism is used for regulating the distance between two sample clamp sheets, enables the sample clamp sheets to clamp the sample bags and is connected with one of the sample clamp sheets, the optical distance regulating mechanism and the sample clamp sheet disconnected with the optical distance regulating mechanism are fixedly arranged on the base, and the moving mechanism is used for switching transmission windows of light spots to be detected or for adjusting positions of the same window corresponding to the light spots to be detected and is connected with the base. The thickness of samples in the sample bags can be changed continuously, and repeatability of the same thickness is realized since the windows are arranged on the sample clamp sheets, so that different samples in the same series have more reliable comparison value, and measurement errors are reduced.
Description
Technical field
The utility model relates to a kind of specimen holder that is used for spectral measurement, particularly relates to a kind of fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured.
Background technology
The terahertz time-domain spectroscopy system is a kind of coherent detection technology, can obtain the amplitude and the phase information of terahertz pulse simultaneously.This technology is utilized terahertz pulse transmission or the reflection from the sample, note terahertz time-domain electric field waveform, obtain the frequency spectrum of sample through Fast Fourier Transform (FFT), processing and analysis by data, can obtain the optical parametric of sample, as refractive index, absorption coefficient etc., and then some important physical chemistry information of acquisition sample.
In terahertz time-domain spectroscopy was measured, different samples had different absorptions to terahertz light.When light can produce corresponding time delay during by certain thickness sample.For the measurement of solution system, sample thickness is a key factor.Fluid sample usually adopts that high purity quartz sample cell or polyethylene plastic bag load preferably in the terahertz wave band permeability.In order to obtain enough signal intensities, sample cell is generally thinner, and as for aqueous solution, because that water absorbs Terahertz is strong, therefore the thickness of aqueous sample have the higher requirement of ratio to sample cell generally in micron dimension.For the high purity quartz sample cell, the thickness that can only obtain to determine can't be regulated variable light path continuously usually.And Polythene Bag owing to yielding, is often measured in the certain thickness clamping plate by being clipped in, but is difficult to control the change of thickness.
Currently used mode is to measure the signal of a series of different-thickness fluid samples, as reference, carries out corresponding data processing with the sample of one of them thickness.Because the absolute value of fluid sample thickness is difficult to precision measure, and the repeatability of its same thickness also is difficult to guarantee.Therefore, the different sample rooms of homologous series are compared mutually, can produce than large deviation.Be the fluid sample pond of adopting conventional infrared spectrum in addition, but need change sample one by one, measure when can't satisfy a plurality of sample.
In addition, during terahertz time-domain spectroscopy was measured, deferred mount made detection light carry out sampling and measuring in the different moment to the electric field intensity of terahertz pulse by changing the optical path difference of surveying between light and pump light, obtains the time waveform of terahertz pulse electric field intensity.For the typical terahertz time-domain spectroscopy of cover system, the main source of noise is caused by pumping laser and other environmental factors, understands the result of interferometry as the minor fluctuations of humidity.Therefore, the amplitude of terahertz pulse signal and position have certain fluctuation with Measuring Time, and the different data of measuring constantly can not reach completely and repeat, thereby cause the error of measurement.When different sample signals self difference hour, this species diversity be easy to by these minor fluctuations and disturb cover.
The utility model content
The technical problems to be solved in the utility model is can't regulate the liquid sample thickness continuously in order to overcome in the prior art, and thickness of sample is difficult to control the deficiency that influences accuracy of detection, and a kind of fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured is provided.
The utility model solves above-mentioned technical matters by following technical proposals:
A kind of fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured, its characteristics are that it comprises:
Two be arranged in parallel, are used for sample sack is carried out the sample intermediate plate of clamping, are equipped with plurality of windows on the described sample intermediate plate;
One is used to adjust described two sample intermediate plate spacings, and makes the light path governor motion of sample intermediate plate clamped sample bag, and wherein in this light path governor motion and the described sample intermediate plate is connected;
One base, this light path governor motion and the described sample intermediate plate that is not connected with this light path governor motion are fixedly arranged on this base plate;
One is used to switch the window that is detected the hot spot transmission, perhaps adjusts the same window travel mechanism of the position of this detection hot spot relatively, and this travel mechanism is connected with base.
Wherein, each described sample intermediate plate includes a substrate, and described window is located on this substrate, is provided with the window stacked with this substrate at this substrate near a side of sample sack.
Wherein, described sample intermediate plate comprises that also one is arranged on the magnetic sheet between this substrate and the cover plate, and the magnetic sheet on two described sample intermediate plates attracts each other.
Wherein, this light path governor motion is a stepper motor.
Wherein, this travel mechanism comprises that one is used for horizontal switch window, or the transverse moving mechanism that the test position in the window is finely tuned, and this transverse moving mechanism is connected with this base plate.
Wherein, this travel mechanism comprises that also one is used for vertical switch window, or the longitudinal moving mechanism that the test position in the window is finely tuned, and this longitudinal moving mechanism is connected with this base plate.
Wherein, this travel mechanism is manually control or electronic control.
In the utility model, but above-mentioned optimum condition combination in any on the basis that meets this area general knowledge promptly gets each preferred embodiments of the utility model.
Positive stepping effect of the present utility model is: the fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured of the present utility model can change sample thickness in the sample sack continuously by the light path governor motion, and realized the repeatability of same thickness by a plurality of windows that on the sample intermediate plate, are provided with, make that having more reliable reference between the different samples of homologous series is worth, the error that reduces to measure, the degree of accuracy of raising sample detection.In addition, the sample intermediate plate of multiwindow has been realized a plurality of liquid samples are carried out the while clamping, and the purpose of continuous detecting has reduced clamping the sample process repeatedly, improves detection efficiency.
Description of drawings
Fig. 1 is the structural representation that is applicable to the fluid sample frame that terahertz time-domain spectroscopy is measured of the present utility model.
Fig. 2 is the structural representation of sample intermediate plate among Fig. 1.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
As illustrated in fig. 1 and 2, the fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured of the present utility model comprises two parallel and be oppositely arranged sample intermediate plates 1 and 2.Sample intermediate plate 1 comprises a substrate 11, is provided with four windows 111 of arranging with matrix form on substrate 11.Side at substrate 11 relative sample sacks 7 sets firmly a window 12.Same, sample intermediate plate 2 comprises the substrate 21 that is provided with window 211, is provided with a window 22 in a side of substrate 21 relative sample sacks 7.Described substrate 11 and 12 can adopt corrosion resistant plate, and aluminium alloy or copper coin are made, and described window 12 and 22 all adopts tygon or teflon or silicon chip etc. to make at the high material of terahertz wave band permeability.Substrate with certain rigidity can guarantee that in clamping process two sample intermediate plates have degree of being parallel to each other preferably, thereby the thickness of guaranteeing the sample sack integral body that is held is more even, reduces measuring error.
Wherein, two specimen holder sheet windows 12 and 22 are oppositely arranged, and sample sack 7 is clamped between them.This sample sack 7 comprises four fluid sample put areas that distribute with matrix form.When install placing sample sack, each zone is clamped in respectively between two relative windows of two sample intermediate plates, thereby surveys the window 211 that hot spot can pass window 111, sample and the sample intermediate plate 2 of print intermediate plate 1 successively.Can sample sack be fixed on the sample intermediate plate by assistant products such as adhesive tapes.
In addition, also can fix sample sack by magnetic magnetic sheet or magnetic stripe.Particularly, each sample intermediate plate also comprises a magnetic sheet (not shown), and described magnetic sheet is arranged between substrate and the window.Be arranged on two magnetic sheets on the sample intermediate plate and attract each other, thereby sample sack 7 is carried out clamping.
This fluid sample frame also comprises a stepper motor 3 and a base 4 as the light path governor motion.
Wherein, stepper motor 3 is connected with sample intermediate plate 2, stepper motor 3 drive sample intermediate plates 2 near or away from sample intermediate plate 1, be used for clamped sample bag 7 on the one hand; Change the thickness of fluid sample on the other hand by the spacing between two sample intermediate plates 1 of control and 2, sample is adjusted to thin gradually from thick during measurement.This stepper motor 3 all is installed on the base plate 4 with the sample intermediate plate 1 that is not connected with stepper motor 3.
This stepper motor 3 is connected with a controller (not shown), by the stepper motor driven step-length of this controller may command.
This fluid sample frame also comprises a longitudinal moving mechanism 6, and this longitudinal moving mechanism 6 is connected with this base plate 4.Under the driving of longitudinal moving mechanism 6, base plate 4 with and the relative hot spot of surveying of sample gone up by two sample intermediate plates 1 and 2 clampings be subjected to displacement, thereby reach the purpose of vertical switch window.This longitudinal moving mechanism can be simple and mechanical structures such as motor, lead screw pair.
The fluid sample frame has also comprised a transverse moving mechanism 5 that is connected with this longitudinal moving mechanism 6, is used to switch the window of cross direction profiles.This transverse moving mechanism also can be simple and mechanical structures such as motor, lead screw pair.
This transverse moving mechanism 5 also all is connected with this controller with longitudinal moving mechanism 6, moves by the switching time and the position of controller control window.This part can realize by programming by existing software, not repeat them here.
In addition, this transverse moving mechanism 5 and longitudinal moving mechanism 6 also can be manual drives, then need this moment manually window to be switched and move operation.
Fluid sample frame of the present utility model can pass through light path governor motion liquid with precise control sample thickness, and adjustable continuously, and by a plurality of windows, measures the different samples of same thickness successively, makes the sample reference, and it is more accurate to measure resulting data on year-on-year basis.
Below the method that fluid sample is carried out spectral measurement of the present utility model is described further.In the measuring process, surveying hot spot can be referring to shown in the arrow among Fig. 2 relative to moving of sample intermediate plate.Need explanation at this, in actual measurement, it is motionless that the detection hot spot of incident keeps, and the sample intermediate plate moves relative to surveying hot spot.
Step S
1, the sample sack 7 that will fill fluid sample by adhesive tape is fixed on the sample intermediate plate 1.
Step S
2, thereby step motor drive sample intermediate plate 2 is near sample intermediate plate 1 clamped sample bags 7, and to default thickness.
Step S
3, adjust the position of windows (window in Fig. 2 upper left corner) by transverse moving mechanism 5 and longitudinal moving mechanism 6, make that surveying hot spot passes through from the center of window.
Step S
4, stay for some time the data of collected specimens.Wherein,,,, a plurality of different loci of this window are measured, averaged then through transverse moving mechanism 5 and longitudinal moving mechanism 6 fine settings at each sample window of measuring in order to improve accuracy of measurement.
Step S
5, switch to next window (window in the upper right corner among Fig. 2) to be measured by transverse moving mechanism 5.
Step S
6, repeated execution of steps S
4And S
5
Step S
7, switch to next window (window in the lower right corner among Fig. 2) to be measured by longitudinal moving mechanism 6.
Step S
8, repeated execution of steps S
4And S
5
Step S
9, switch to next window (window in the lower left corner among Fig. 2) to be measured by transverse moving mechanism 5.
Step S
10, repeated execution of steps S
4And S
5
Step S
11, drive sample intermediate plates 2 further to reduce thickness of sample by stepper motor 3, execution in step S once more subsequently
3-S
10
If need under same thickness condition, measure, can hold that the different samples of injection get final product in the zone in the difference of sample sack 7 to different samples.
Number of windows in the utility model and position distribution only are used to illustrate, and are not to be used for the utility model is limited.Those skilled in the art can adjust the quantity and the position distribution of window according to actual conditions.Wherein, when window only is a horizontal row when distributing, then can omit longitudinal moving mechanism.When only being the vertical distribution of a row, can omit transverse moving mechanism as if window.
Though more than described embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection domain of the present utility model is limited by appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes and modification all fall into protection domain of the present utility model.
Claims (6)
1. fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured is characterized in that it comprises:
Two sample intermediate plates that be arranged in parallel, are used for sample sack is carried out clamping are equipped with plurality of windows on the described sample intermediate plate;
One is used to adjust described two sample intermediate plate spacings, and makes the light path governor motion of sample intermediate plate clamped sample bag, and wherein in this light path governor motion and the described sample intermediate plate is connected;
One base, this light path governor motion and the described sample intermediate plate that is not connected with this light path governor motion are fixedly arranged on this base plate;
One is used to switch the window that is detected the hot spot transmission or is used to adjust the same window travel mechanism of the position of this detection hot spot relatively, and this travel mechanism is connected with base.
2. the fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured as claimed in claim 1, it is characterized in that, each described sample intermediate plate includes a substrate, and described window is located on this substrate, is provided with the window stacked with this substrate at this substrate near a side of sample sack.
3. the fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured as claimed in claim 2 is characterized in that described sample intermediate plate comprises that also one is arranged on the magnetic sheet between this substrate and the window, and the magnetic sheet on two described sample intermediate plates attracts each other.
4. the fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured as claimed in claim 1 is characterized in that this light path governor motion is a stepper motor.
5. as each described fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured among the claim 1-4, it is characterized in that, this travel mechanism comprises that one is used for horizontal switch window, or the transverse moving mechanism that the test position in the window is finely tuned, this transverse moving mechanism is connected with this base plate.
6. the fluid sample frame that is applicable to that terahertz time-domain spectroscopy is measured as claimed in claim 5, it is characterized in that, this travel mechanism comprises that also one is used for vertical switch window, or the longitudinal moving mechanism that the test position in the window is finely tuned, and this longitudinal moving mechanism is connected with this base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200419055U CN202041456U (en) | 2011-02-18 | 2011-02-18 | Liquid sample holder applicable to terahertz time domain spectral measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200419055U CN202041456U (en) | 2011-02-18 | 2011-02-18 | Liquid sample holder applicable to terahertz time domain spectral measurement |
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| Publication Number | Publication Date |
|---|---|
| CN202041456U true CN202041456U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200419055U Expired - Lifetime CN202041456U (en) | 2011-02-18 | 2011-02-18 | Liquid sample holder applicable to terahertz time domain spectral measurement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645404A (en) * | 2011-02-18 | 2012-08-22 | 中国科学院上海应用物理研究所 | Liquid sample stand suitable for terahertz time-domain spectral measurement and method thereof |
| CN104792699A (en) * | 2015-04-03 | 2015-07-22 | 浙江大学 | Multifunctional sample stand applicable to terahertz time-domain spectrum detection system |
| CN109580536A (en) * | 2018-12-17 | 2019-04-05 | 南京市江宁医院 | Sample arm based on Terahertz detection flesh tissue sample |
| CN112485220A (en) * | 2020-12-08 | 2021-03-12 | 广东星创众谱仪器有限公司 | Automatic adjusting module for optical path of material bin |
-
2011
- 2011-02-18 CN CN2011200419055U patent/CN202041456U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645404A (en) * | 2011-02-18 | 2012-08-22 | 中国科学院上海应用物理研究所 | Liquid sample stand suitable for terahertz time-domain spectral measurement and method thereof |
| CN102645404B (en) * | 2011-02-18 | 2015-09-30 | 中国科学院上海应用物理研究所 | Be applicable to liquid sample stand and the method thereof of terahertz time-domain spectroscopy measurement |
| CN104792699A (en) * | 2015-04-03 | 2015-07-22 | 浙江大学 | Multifunctional sample stand applicable to terahertz time-domain spectrum detection system |
| CN109580536A (en) * | 2018-12-17 | 2019-04-05 | 南京市江宁医院 | Sample arm based on Terahertz detection flesh tissue sample |
| CN112485220A (en) * | 2020-12-08 | 2021-03-12 | 广东星创众谱仪器有限公司 | Automatic adjusting module for optical path of material bin |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20111116 Effective date of abandoning: 20150930 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20111116 Effective date of abandoning: 20150930 |
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| RGAV | Abandon patent right to avoid regrant |