CN209928763U - Novel alcohol spectrum absorption characteristic demonstration verification system - Google Patents
Novel alcohol spectrum absorption characteristic demonstration verification system Download PDFInfo
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- CN209928763U CN209928763U CN201820623416.2U CN201820623416U CN209928763U CN 209928763 U CN209928763 U CN 209928763U CN 201820623416 U CN201820623416 U CN 201820623416U CN 209928763 U CN209928763 U CN 209928763U
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- alcohol
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- steam
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- laser light
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Abstract
The utility model relates to a novel alcohol spectrum absorption characteristic demonstration verification system, including laser light source, alcohol vapor absorption cell, steam circulating pump, steam generator, signal detector and data acquisition and processing apparatus. The output end of the laser light source is connected with the input end of the alcohol vapor absorption pool. The output end of the alcohol vapor absorption pool is connected with the input end of the signal detector. The inlet of the steam generator is connected with the outlet of the alcohol steam absorption pool, and the outlet is connected with the inlet of the steam circulating pump. The outlet of the steam circulating pump is connected with the inlet of the alcohol steam absorption pool. The output end of the signal detector is connected with the input end of the data acquisition and processing device. The output end of the data acquisition and processing device is connected with the input end of the laser light source. The utility model discloses can realize that alcohol molecule absorption spectrum characteristic under the different molecular concentration demonstrates the verification, help deeply to understand the gas molecule in high school's physical experiment to the absorptive action of continuous light, help the student to construct the concept of molecule absorption spectrum.
Description
Technical Field
The utility model relates to an experiment demonstration system technical field, concretely relates to novel alcohol spectrum absorption characteristic demonstration verification system.
Background
At present, the emission spectrum and the absorption spectrum are important components of wave optics in high-intermediate physics. Whether the emission spectrum of atomic molecules after being excited or the absorption spectrum of continuous light after being absorbed by the atomic molecules have the inherent properties of various substances, for example, a beam of continuous light passes through nano-vapor, so that a clear black dark line can be seen in a yellow area in the continuous color spectrum. Due to the demonstration and verification system, the concentration of the substance to be detected cannot directly give an accurate value from the spectrogram.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel alcohol spectral absorption characteristic demonstration verification system, this system can realize that the alcohol molecule absorption spectral characteristic under the different concentration conditions demonstrates the verification.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel alcohol spectrum absorption characteristic demonstration verification system comprises a laser light source, an alcohol vapor absorption pool, a vapor circulating pump, a vapor generator, a signal detector and a data acquisition and processing device. The output end of the laser light source is connected with the input end of the alcohol vapor absorption pool. And the output end of the alcohol vapor absorption pool is connected with the input end of the signal detector. The inlet of the steam generator is connected with the outlet of the alcohol steam absorption pool, and the outlet of the steam generator is connected with the inlet of the steam circulating pump. The outlet of the steam circulating pump is connected with the inlet of the alcohol steam absorption pool. The output end of the signal detector is connected with the input end of the data acquisition and processing device. The output end of the data acquisition and processing device is connected with the input end of the laser light source.
The input end of the alcohol vapor absorption tank is used for enabling the laser light source to generate modulated infrared continuous laser to enter the alcohol vapor absorption tank; and the output end of the alcohol vapor absorption tank is used for enabling the laser entering the alcohol vapor absorption tank to leave the alcohol vapor absorption tank and enter the signal detector after being reflected and absorbed for multiple times.
Furthermore, the laser light source adopts a tunable external cavity semiconductor laser.
Further, the alcohol vapor absorption pool adopts a white pool.
Further, the signal detector adopts a photoelectric detector.
Further, the data and processing device comprises an acquisition card and a computer.
The utility model has the advantages that:
(1) the system be based on the absorption effect of alcohol gas molecule to infrared band characteristic spectrum line, can realize the experiment demonstration verification of absorption spectrum intensity variation characteristic under the different molecular concentration.
(2) The utility model discloses an absorption characteristic of two absorption spectral lines of 1.39um and 3.35um inversion alcohol steam acquires the sensitivity of alcohol molecule to different wavelength characteristic spectral lines.
(3) The utility model discloses utilize adjustable semiconductor laser to produce continuous adjustable infrared laser, cooperation concentration adjustable alcohol steam produces and measuring device, has realized the organic combination of most advanced spectroscopy measurement technique and classroom teaching, has expanded student's the field of vision, has powerfully aroused student's interest in learning. Meanwhile, the reverse conception ability of students can be stimulated. The alcohol vapor generating and measuring device comprises an alcohol vapor absorption pool, a vapor generator, a vapor circulating pump and a signal detector.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein:
100. the device comprises a laser light source, 200, an alcohol vapor absorption pool, 201, a vapor circulating pump, 202, a vapor generator, 300, a signal detector, 400 and a data acquisition and processing device.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
the system for demonstrating and verifying the spectral absorption characteristics of alcohol shown in fig. 1 comprises a laser light source 100, an alcohol vapor absorption cell 200, a vapor circulating pump 201, a vapor generator 202, a signal detector 300 and a data acquisition and processing device 400. The output end of the laser light source 100 is connected with the input end of the alcohol vapor absorption cell 200. The output end of the alcohol vapor absorption cell 200 is connected with the input end of the signal detector 300. The inlet of the steam generator 202 is connected with the outlet of the alcohol vapor absorption tank 200, and the outlet of the steam generator 202 is connected with the inlet of the steam circulating pump 201. The outlet of the steam circulating pump 201 is connected with the inlet of the alcohol vapor absorption tank 200. The output end of the signal detector 300 is connected with the input end of the data acquisition and processing device 400. The output end of the data acquisition and processing device 400 is connected with the input end of the laser light source 100. The input end of the alcohol vapor absorption tank is used for enabling the laser light source to generate modulated infrared continuous laser to enter the alcohol vapor absorption tank; and the output end of the alcohol vapor absorption tank is used for enabling the laser entering the alcohol vapor absorption tank to leave the alcohol vapor absorption tank and enter the signal detector after being reflected and absorbed for multiple times.
Further, the laser light source 100 employs a tunable external cavity semiconductor laser, which can achieve dual modulation of laser signals and wavelengths. The laser light source 100 is used for providing an original laser signal covering an infrared absorption band of alcohol vapor, and can realize periodic wavelength scanning and continuous output.
Further, the alcohol vapor absorption cell 200 adopts a white cell, so that multiple reflections of laser in the cell can be realized, the absorption intensity of an original laser signal is improved by increasing the absorption optical path, and the absorption optical path in an experimental environment is prolonged. The alcohol vapor absorption tank 200 is matched with the vapor circulating pump 201 and the vapor generator 202, so that the dynamic adjustment of the concentration of alcohol molecules in the absorption tank can be realized, and the difference and the coincidence of the laser original spectrum and the absorption spectrum under different alcohol vapor concentrations can be visually demonstrated.
Further, the signal detector 300 employs a high-sensitivity infrared photodetector to realize collection of the laser absorption spectrum. The signal detector 300 demodulates the laser signal and feeds back the wavelength and light intensity data of the laser to the data acquisition and processing device 400.
Further, the data and processing device 400 includes an acquisition card and a computer. The acquisition card is used for acquiring laser characteristic spectral line data before and after absorption. The computer is used for displaying the spectrum absorption effect of the alcohol and obtaining the concentration of the alcohol gas in the white cell on one hand, and is used for modulating the laser light source on the other hand.
The utility model discloses a theory of operation does:
the utility model adopts the wavelength-adjustable external cavity semiconductor laser to generate a continuous light source, and removes the influence of ambient light on the experimental result while covering the molecular absorption spectrum line; inverting the absorption characteristics of the alcohol vapor by adopting two absorption spectral lines of 1.39um and 3.35 um; a white pool is used as an alcohol vapor absorption pool, so that the absorption optical path of alcohol vapor is increased; the photoelectric detector and the acquisition card are adopted to realize acquisition, demodulation and data transmission of the absorption spectrum; and (3) synchronously displaying the spectrums before and after absorption by adopting a computer, and acquiring the alcohol vapor concentration in the alcohol vapor absorption tank.
Specifically, the utility model utilizes the steam generator 202 to generate alcohol steam with relatively stable concentration at a certain temperature; the alcohol vapor is transported into the alcohol vapor absorption tank 200 by the vapor circulation pump 201, and is continuously circulated for a certain period of time so that the alcohol vapor concentration in the vapor absorption tank 200 is constant. The laser light source 100 generates modulated infrared continuous laser light, enters the alcohol vapor absorption tank 200, and leaves the alcohol vapor absorption tank 200 after multiple reflections and absorption. The infrared laser light absorbed by the alcohol vapor enters the signal detector 300, and the spectral data is sent back to the data acquisition and processing device 400 through demodulation and conversion. In the data collecting and processing device 400, the laser spectrum before and after the absorption of the alcohol vapor can be directly given, and the spectral data can be compared and analyzed. It should be noted that by changing the state of the steam generator 202, etc., the steam concentration in the alcohol steam absorption cell 200 can be indirectly changed, so as to change the absorption intensity of the absorption spectrum, which can help students establish the one-to-one correspondence relationship between the molecular absorption spectrum, the absorption characteristic and the molecular concentration, and is helpful for deeply understanding the absorption characteristic between the molecular concentration and the spectrum.
The absorption principle of alcohol vapor on the original laser spectrum is as follows:
the laser light source 100 emits laser light with intensity I0The laser intensity after passing through the alcohol vapor absorption cell is I, so thatSpecific values can be given by the following expressions:
I＝I0*exp(-L*σ*c)
wherein, L is the actual absorption optical path of the laser, sigma is the absorption coefficient, and c is a constant.
Therefore, when the laser absorption optical path in the alcohol vapor absorption cell 200 is changed or the concentration of the alcohol vapor in the alcohol vapor absorption cell 200 is changed, the absorbed laser light intensity I and the original laser light intensity I are caused0The ratio of the two to the other. Further, after the laser absorption optical path in the alcohol absorption cell 200 is fixed, the absorption coefficient σ can be directly obtained through a formula, and the concentration of the alcohol vapor can be obtained in real time through calibration.
To sum up, the utility model discloses can demonstrate the existence of verifying alcohol molecular characteristic spectral line and verify infrared band laser spectrum absorption effect's experiment demonstration. The system be based on the absorption effect of alcohol gas molecule to infrared band characteristic spectral line, realize that alcohol molecule absorption spectrum characteristic under the different molecular concentration demonstrates the verification, help going into deeply in high school's physical experiment to understand the absorption of gas molecule to continuous light, help the student to establish the concept of molecule absorption spectrum.
The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (5)
1. A novel alcohol spectrum absorption characteristic demonstration verification system is characterized in that: the device comprises a laser light source, an alcohol vapor absorption pool, a vapor circulating pump, a vapor generator, a signal detector and a data acquisition and processing device; the output end of the laser light source is connected with the input end of the alcohol vapor absorption pool; the output end of the alcohol vapor absorption pool is connected with the input end of the signal detector; the inlet of the steam generator is connected with the outlet of the alcohol steam absorption pool, and the outlet of the steam generator is connected with the inlet of the steam circulating pump; the outlet of the steam circulating pump is connected with the inlet of the alcohol steam absorption pool; the output end of the signal detector is connected with the input end of the data acquisition and processing device; the output end of the data acquisition and processing device is connected with the input end of the laser light source; the input end of the alcohol vapor absorption tank is used for enabling the laser light source to generate modulated infrared continuous laser to enter the alcohol vapor absorption tank; and the output end of the alcohol vapor absorption tank is used for enabling the laser entering the alcohol vapor absorption tank to leave the alcohol vapor absorption tank and enter the signal detector after being reflected and absorbed for multiple times.
2. The novel alcohol spectrum absorption characteristic demonstration and verification system according to claim 1, characterized in that: the laser light source adopts a tunable external cavity semiconductor laser.
3. The novel alcohol spectrum absorption characteristic demonstration and verification system according to claim 1, characterized in that: the alcohol vapor absorption tank adopts a white tank.
4. The novel alcohol spectrum absorption characteristic demonstration and verification system according to claim 1, characterized in that: the signal detector adopts a photoelectric detector.
5. The novel alcohol spectrum absorption characteristic demonstration and verification system according to claim 1, characterized in that: the data and processing device comprises an acquisition card and a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820623416.2U CN209928763U (en) | 2018-04-27 | 2018-04-27 | Novel alcohol spectrum absorption characteristic demonstration verification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820623416.2U CN209928763U (en) | 2018-04-27 | 2018-04-27 | Novel alcohol spectrum absorption characteristic demonstration verification system |
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| Publication Number | Publication Date |
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| CN209928763U true CN209928763U (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820623416.2U Expired - Fee Related CN209928763U (en) | 2018-04-27 | 2018-04-27 | Novel alcohol spectrum absorption characteristic demonstration verification system |
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| Country | Link |
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| CN (1) | CN209928763U (en) |
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2018
- 2018-04-27 CN CN201820623416.2U patent/CN209928763U/en not_active Expired - Fee Related
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Granted publication date: 20200110 Termination date: 20200427 |
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| CF01 | Termination of patent right due to non-payment of annual fee |