CN116879263A - Method for improving parameter stability of Raman spectrometer and implementation device - Google Patents
Method for improving parameter stability of Raman spectrometer and implementation device Download PDFInfo
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- CN116879263A CN116879263A CN202310792453.1A CN202310792453A CN116879263A CN 116879263 A CN116879263 A CN 116879263A CN 202310792453 A CN202310792453 A CN 202310792453A CN 116879263 A CN116879263 A CN 116879263A
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- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 36
- 238000001237 Raman spectrum Methods 0.000 claims abstract description 20
- 238000001228 spectrum Methods 0.000 claims abstract description 19
- 230000008859 change Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000001678 irradiating effect Effects 0.000 claims abstract description 6
- 230000005284 excitation Effects 0.000 claims abstract description 4
- 238000005516 engineering process Methods 0.000 claims abstract description 3
- 239000013307 optical fiber Substances 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 11
- 230000035945 sensitivity Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000007619 statistical method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The invention relates to the field of improving the parameter stability of a Raman spectrometer by a technology, and discloses a method for improving the parameter stability of the Raman spectrometer, which comprises the following steps: preparing a Raman spectrometer and a high-intensity 1064nm laser source; irradiating the sample, aligning a laser light source to the detected sample, and enabling light to irradiate the surface of the sample to generate a Raman scattering spectrum under excitation; collecting Raman spectrum, and collecting Raman scattering spectrum of the detected sample by using a Raman spectrometer to obtain characteristic spectrum peak information of the sample; and acquiring laser light intensity parameters, acquiring the light intensity value of the current laser by increasing the power of the detector, and inputting light intensity information into an algorithm for processing. According to the invention, the intensity change information of the laser light source is acquired in the material detection process of the Raman spectrometer, the light signal intensity information is converted into a digital signal and is sent to a post-stage algorithm processing unit for processing, and the stability of the measuring parameters of the Raman spectrometer is improved.
Description
Technical Field
The invention relates to the technical field of improving the parameter stability of a Raman spectrometer, in particular to a method for improving the parameter stability of the Raman spectrometer and a realization device thereof.
Background
In the application of measuring substance components, the Raman spectrometer still generates small-range fluctuation of laser energy in the process of adjusting a laser light source, fluctuation of Raman spectrum is caused by strength change of the laser light source, and finally the stability of parameter measurement of the whole system is influenced;
the existing Raman spectrometer can meet the requirements of general measurement precision and parameter stability, and when the stability requirement of the equipment measurement parameter is less than 0.3%, the stability of the measurement parameter of the existing Raman spectrometer is difficult to meet the requirement due to fluctuation of laser intensity.
Therefore, a method for improving the parameter stability of the Raman spectrometer and a realization device are provided.
Disclosure of Invention
In view of the foregoing problems of the prior art, an aspect of the present invention is to provide a method and an implementation device for improving parameter stability of a raman spectrometer.
In order to achieve the above object, the present invention provides a method for improving the stability of parameters of a raman spectrometer;
the method comprises the following steps:
s1: preparing a Raman spectrometer and a high-intensity 1064nm laser source;
s2: irradiating the sample, aligning a laser light source to the detected sample, and enabling light to irradiate the surface of the sample to generate a Raman scattering spectrum under excitation;
s3: collecting Raman spectrum, and collecting Raman scattering spectrum of the detected sample by using a Raman spectrometer to obtain characteristic spectrum peak information of the sample;
s4: acquiring laser light intensity parameters, acquiring the light intensity value of the current laser by increasing the power of the detector, and inputting light intensity information into an algorithm for processing;
s5: processing data, namely performing data processing on the collected current laser light intensity and the current Raman spectrum through an algorithm, and inhibiting and eliminating the influence caused by the laser light intensity change;
s6: and (3) analyzing results, namely observing the difference between the intensity of the Raman spectrum peak after treatment and the intensity before the treatment, and analyzing the treatment effect of the algorithm and the stability of system parameters. If necessary, the performance of the system is continually improved based on the result optimization algorithm and system parameters.
Preferably, in the preparation work, a high-quality raman spectrometer and a high-intensity laser light source are required to be used, and stability and accuracy thereof are ensured to ensure accuracy of measurement results.
Preferably, in the irradiated sample, attention is paid to the focusing and irradiation angle of the laser, so that the complete and accurate raman scattering spectrum can be obtained.
Preferably, in the acquisition of raman spectra, care is taken to adjust the instrument parameters and to use a high sensitivity detector to acquire high quality raman spectra.
Preferably, in the acquisition of the laser light intensity parameters, a proper detector needs to be selected, the sensitivity thereof is calibrated, and the power range and the integration time are adjusted to ensure the precision and the stability.
Preferably, in the processing data, an appropriate algorithm is required to be selected, and parameter adjustment is performed according to actual requirements, so as to obtain an optimal data processing effect.
Preferably, in the analysis result, data before and after processing needs to be compared and statistical analysis is performed to evaluate the performance of the algorithm and the system, find problems and optimize and improve in time.
An apparatus for improving stability of raman spectrometer parameters for implementing the method of claim 1, comprising:
the optical fiber laser is used for generating a laser light source required by the Raman spectrometer, selecting proper laser wavelength and power according to the characteristics of a sample so as to ensure the accuracy and stability of a measurement result, and transmitting generated laser to the optical splitter device through an optical fiber;
the optical divider is used for dividing the laser into two paths for output, and one path is used for detecting a tested sample and outputting 95% of the original laser power; the other path outputs 5% of the original laser power for laser intensity detection, and proper output power proportion is set to meet the requirements of laser power and laser intensity detection required by the detection of a sample to be detected;
photo detector: the laser intensity measuring device is used for converting the measured laser intensity change information into a weak analog electric signal, and the part needs to adopt a high-sensitivity photoelectric detector and pay attention to the response speed of the photoelectric detector so as to accurately detect the measured laser intensity change in real time and convert the measured laser intensity change into a corresponding analog electric signal;
signal acquisition card: the system is used for converting analog signals into digital signals and uploading the digital signals with laser intensity information to an upper computer through a communication interface for algorithm processing, and the part needs to use a high-quality signal acquisition card and pay attention to the sampling rate and the resolution of the high-quality signal acquisition card so as to convert the analog signals into high-precision digital signals and upload the high-precision digital signals to the upper computer through the communication interface for algorithm processing and analysis of the laser intensity information.
Preferably, in the optical fiber transmission process, an optical fiber amplifier and an optical fiber attenuator can be used to further improve stable transmission of the optical signal; in the photodetector section, amplifiers and filters can be used to improve the sensitivity and accuracy of the signal.
Preferably, in the signal acquisition card part, embedded system or FPGA hardware acceleration technology can be used to realize more efficient signal processing and algorithm operation.
Compared with the prior art, the method and the implementation device for improving the parameter stability of the Raman spectrometer have the following beneficial effects:
1. the method comprises the steps of collecting intensity change information of a laser light source in a material detection process of a Raman spectrometer, converting optical signal intensity information into digital signals, and sending the digital signals to a post-stage algorithm processing unit for processing, so that stability of measuring parameters of the Raman spectrometer is improved;
2. an improved method and an implementation device are provided for improving the stability of the measurement parameters of the Raman spectrometer;
3. under the condition of slightly changing the hardware of the original equipment, the laser power inspection device is rapidly integrated into the original equipment, so that the time required by the whole equipment to be rearranged is greatly shortened;
4. the laser intensity change information is collected through a laser intensity feedback device and fed back to the upper processing equipment, and the upper processing equipment carries out calibration processing on the current laser intensity and the current Raman spectrum through an algorithm, so that more stable Raman parameters can be calculated.
Drawings
Fig. 1 is a schematic structural diagram of a method for improving parameter stability of a raman spectrometer and an implementation device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure.
Referring to fig. 1, a method for improving parameter stability of a raman spectrometer;
the method comprises the following steps:
s1: preparing a Raman spectrometer and a high-intensity 1064nm laser source;
s2: irradiating the sample, aligning a laser light source to the detected sample, and enabling light to irradiate the surface of the sample to generate a Raman scattering spectrum under excitation;
s3: collecting Raman spectrum, and collecting Raman scattering spectrum of the detected sample by using a Raman spectrometer to obtain characteristic spectrum peak information of the sample;
s4: acquiring laser light intensity parameters, acquiring the light intensity value of the current laser by increasing the power of the detector, and inputting light intensity information into an algorithm for processing;
s5: processing data, namely performing data processing on the collected current laser light intensity and the current Raman spectrum through an algorithm, and inhibiting and eliminating the influence caused by the laser light intensity change;
s6: and (3) analyzing results, namely observing the difference between the intensity of the Raman spectrum peak after treatment and the intensity before the treatment, and analyzing the treatment effect of the algorithm and the stability of system parameters. If necessary, the performance of the system is continually improved based on the result optimization algorithm and system parameters.
In an alternative embodiment, in preparation, a high quality raman spectrometer and a high intensity laser light source are used and their stability and accuracy are ensured to ensure the accuracy of the measurement results.
In an alternative embodiment, in irradiating the sample, attention is paid to the focus and irradiation angle of the laser light, ensuring that a complete and accurate raman scattering spectrum is obtained.
In an alternative embodiment, care is taken to adjust the instrument parameters in acquiring raman spectra, and a high sensitivity detector is used to acquire high quality raman spectra.
In an alternative embodiment, in collecting the laser light intensity parameters, it is necessary to select the appropriate detector and calibrate its sensitivity, adjust the power range and integration time to ensure accuracy and stability.
In an alternative embodiment, in the processing of data, a suitable algorithm needs to be selected, and parameter adjustment is performed according to actual requirements, so as to obtain an optimal data processing effect.
In an alternative embodiment, in the analysis results, it is necessary to compare the data before and after the processing and perform statistical analysis to evaluate the performance of the algorithm and system, find problems and optimize and improve in time.
An apparatus for improving stability of raman spectrometer parameters for implementing the method of claim 1, comprising:
the optical fiber laser is used for generating a laser light source required by the Raman spectrometer, selecting proper laser wavelength and power according to the characteristics of a sample so as to ensure the accuracy and stability of a measurement result, and transmitting generated laser to the optical splitter device through an optical fiber;
the optical divider is used for dividing the laser into two paths for output, and one path is used for detecting a tested sample and outputting 95% of the original laser power; the other path outputs 5% of the original laser power for laser intensity detection, and proper output power proportion is set to meet the requirements of laser power and laser intensity detection required by the detection of a sample to be detected;
photo detector: the laser intensity measuring device is used for converting the measured laser intensity change information into a weak analog electric signal, and the part needs to adopt a high-sensitivity photoelectric detector and pay attention to the response speed of the photoelectric detector so as to accurately detect the measured laser intensity change in real time and convert the measured laser intensity change into a corresponding analog electric signal;
signal acquisition card: the system is used for converting analog signals into digital signals and uploading the digital signals with laser intensity information to an upper computer through a communication interface for algorithm processing, and the part needs to use a high-quality signal acquisition card and pay attention to the sampling rate and the resolution of the high-quality signal acquisition card so as to convert the analog signals into high-precision digital signals and upload the high-precision digital signals to the upper computer through the communication interface for algorithm processing and analysis of the laser intensity information.
In an alternative embodiment, during the optical fiber transmission, an optical fiber amplifier and an optical fiber attenuator may be used to further enhance the stable transmission of the optical signal; in the photodetector section, amplifiers and filters can be used to improve the sensitivity and accuracy of the signal.
In an alternative embodiment, embedded system or FPGA hardware acceleration techniques may be used in the signal acquisition card portion to achieve more efficient signal processing and algorithmic operations.
In the invention, a Raman spectrometer is an instrument for realizing Raman scattering spectrum detection by irradiating a detected sample by a high-intensity 1064nm laser light source, the detected sample generates Raman scattering spectrum signals under the irradiation of laser, the Raman scattering spectrum signals with characteristic spectrum peaks can be used for determining the substance components of the detected sample, in order to improve the parameter stability of the Raman spectrometer, the variation parameters of the laser light intensity are required to be collected into a system, the current laser intensity and the current Raman spectrum are processed by an algorithm to inhibit the variation of the intensity of the Raman spectrum peaks caused by the variation of the laser intensity, in order to realize the method, firstly, a laser light source required by the Raman spectrometer is required to be generated by an optical fiber laser machine and transmitted to an optical splitter device by an optical fiber, the optical splitter can divide the laser light source into two paths for outputting, and one path is used for detecting the detected sample and can output 95% of the original laser power; the other path is used for laser intensity detection, 5% of the original laser power is output, the laser intensity detection part uses a high-sensitivity photoelectric detector to convert the detected laser intensity change information into a weak analog electric signal, the signal acquisition card converts the analog signal generated by the photoelectric detector into a digital signal, and the digital signal with the laser intensity information is uploaded to an upper computer through a communication interface for algorithm processing.
The above description is only exemplary embodiments of the present invention and is not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.
Claims (10)
1. A method for improving the stability of parameters of a raman spectrometer, comprising the steps of: the method comprises the following steps:
s1: preparing a Raman spectrometer and a high-intensity 1064nm laser source;
s2: irradiating the sample, aligning a laser light source to the detected sample, and enabling light to irradiate the surface of the sample to generate a Raman scattering spectrum under excitation;
s3: collecting Raman spectrum, and collecting Raman scattering spectrum of the detected sample by using a Raman spectrometer to obtain characteristic spectrum peak information of the sample;
s4: acquiring laser light intensity parameters, acquiring the light intensity value of the current laser by increasing the power of the detector, and inputting light intensity information into an algorithm for processing;
s5: processing data, namely performing data processing on the collected current laser light intensity and the current Raman spectrum through an algorithm, and inhibiting and eliminating the influence caused by the laser light intensity change;
s6: and (3) analyzing results, namely observing the difference between the intensity of the Raman spectrum peak after treatment and the intensity before the treatment, and analyzing the treatment effect of the algorithm and the stability of system parameters. If necessary, the performance of the system is continually improved based on the result optimization algorithm and system parameters.
2. A method of improving the stability of parameters of a raman spectrometer according to claim 1, wherein: in the preparation work, a high-quality raman spectrometer and a high-intensity laser light source are required to be used, and stability and accuracy thereof are ensured to ensure accuracy of measurement results.
3. A method of improving the stability of parameters of a raman spectrometer according to claim 1, wherein: in the irradiation of the sample, attention is paid to the focusing and irradiation angle of the laser, so that the complete and accurate Raman scattering spectrum can be obtained.
4. A method of improving the stability of parameters of a raman spectrometer according to claim 1, wherein: in the acquisition of raman spectra, care is taken to adjust the instrument parameters and to use a high sensitivity detector to acquire high quality raman spectra.
5. A method of improving the stability of parameters of a raman spectrometer according to claim 1, wherein: in the acquisition of the laser light intensity parameters, a proper detector needs to be selected, the sensitivity of the detector is calibrated, and the power range and the integration time are adjusted to ensure the precision and the stability.
6. A method of improving the stability of parameters of a raman spectrometer according to claim 1, wherein: in the data processing, a proper algorithm is required to be selected, and parameter adjustment is carried out according to actual requirements so as to obtain the optimal data processing effect.
7. A method of improving the stability of parameters of a raman spectrometer according to claim 1, wherein: in the analysis result, data before and after processing is compared and statistical analysis is performed to evaluate the performance of an algorithm and a system, find problems and optimize and improve in time.
8. An apparatus for improving stability of parameters of a raman spectrometer for implementing the method of claim 1, said apparatus comprising:
the optical fiber laser is used for generating a laser light source required by the Raman spectrometer, selecting proper laser wavelength and power according to the characteristics of a sample so as to ensure the accuracy and stability of a measurement result, and transmitting generated laser to the optical splitter device through an optical fiber;
the optical divider is used for dividing the laser into two paths for output, and one path is used for detecting a tested sample and outputting 95% of the original laser power; the other path outputs 5% of the original laser power for laser intensity detection, and proper output power proportion is set to meet the requirements of laser power and laser intensity detection required by the detection of a sample to be detected;
photo detector: the laser intensity measuring device is used for converting the measured laser intensity change information into a weak analog electric signal, and the part needs to adopt a high-sensitivity photoelectric detector and pay attention to the response speed of the photoelectric detector so as to accurately detect the measured laser intensity change in real time and convert the measured laser intensity change into a corresponding analog electric signal;
signal acquisition card: the system is used for converting analog signals into digital signals and uploading the digital signals with laser intensity information to an upper computer through a communication interface for algorithm processing, and the part needs to use a high-quality signal acquisition card and pay attention to the sampling rate and the resolution of the high-quality signal acquisition card so as to convert the analog signals into high-precision digital signals and upload the high-precision digital signals to the upper computer through the communication interface for algorithm processing and analysis of the laser intensity information.
9. The apparatus for improving the stability of parameters of a raman spectrometer according to claim 8, wherein: in the optical fiber transmission process, an optical fiber amplifier and an optical fiber attenuator can be used to further improve the stable transmission of optical signals; in the photodetector section, amplifiers and filters can be used to improve the sensitivity and accuracy of the signal.
10. The apparatus for improving the stability of parameters of a raman spectrometer according to claim 8, wherein: in the signal acquisition card part, embedded system or FPGA hardware acceleration technology can be used to realize more efficient signal processing and algorithm operation.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117653920A (en) * | 2023-12-29 | 2024-03-08 | 广州市芯科电子科技有限公司 | Good-stability spectrometer system for beauty treatment and stabilizing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117653920A (en) * | 2023-12-29 | 2024-03-08 | 广州市芯科电子科技有限公司 | Good-stability spectrometer system for beauty treatment and stabilizing method |
| CN117653920B (en) * | 2023-12-29 | 2024-05-07 | 广州市芯科电子科技有限公司 | Good-stability spectrometer system for beauty treatment and stabilizing method |
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