CN221405419U - Multi-channel online Raman spectrum acquisition and analysis integrated device - Google Patents
Multi-channel online Raman spectrum acquisition and analysis integrated device Download PDFInfo
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- CN221405419U CN221405419U CN202323132071.0U CN202323132071U CN221405419U CN 221405419 U CN221405419 U CN 221405419U CN 202323132071 U CN202323132071 U CN 202323132071U CN 221405419 U CN221405419 U CN 221405419U
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Abstract
The utility model discloses a multichannel online Raman spectrum acquisition and analysis integrated device, which comprises a laser, an input optical fiber, a Raman probe group, a sample group, an output optical fiber, a spectrometer and a main control board, wherein the input optical fiber is connected with the Raman probe group; the Raman probe group comprises a plurality of Raman probes and is used for simultaneously detecting a plurality of samples in the sample group; each Raman probe is correspondingly connected with one input optical fiber and one output optical fiber to form an acquisition channel; a light gate is arranged between the laser and the multipath input optical fibers, and an optical switch is arranged between the multipath output optical fibers and the spectrometer; the main control board is connected with the laser, the optical gate, the optical switch and the spectrometer. The multi-channel on-line Raman spectrum acquisition and analysis integrated device provided by the utility model can not only carry out Raman detection on a plurality of samples and effectively improve the efficiency of Raman acquisition and signal analysis processing, but also reduce the volume of the whole device and greatly reduce the instrument cost.
Description
Technical Field
The utility model relates to a spectrum acquisition and analysis device, in particular to a multichannel online Raman spectrum acquisition and analysis integrated device.
Background
Online raman spectroscopy is a non-contact, non-invasive analysis technique. The online raman spectrum analysis technology is an analysis method for analyzing a scattering spectrum with different frequency from an incident light based on a raman scattering effect to obtain information such as molecular vibration, rotation and the like, and is applied to molecular structure research. The online Raman spectrum is gradually and widely applied to the fields of pharmacy, petrochemical industry, high polymer chemical industry, energy, fine chemical industry, food and the like according to the advantages of high detection speed, no damage, multiple components, multiple channels, high efficiency and the like. The timely and accurate analysis data provided by the Raman spectrum plays an irreplaceable role in stable production, optimized operation, energy conservation and consumption reduction.
Along with the development of instrument technology, the sensitivity and resolution of the Raman spectrometer are continuously improved, the operation of the spectrometer is simpler, and the appearance structure is simpler. The expansion of the application field puts new demands on the functions of the online raman spectrometer. Because in practical application, a plurality of targets often exist under the condition that the targets need to be detected simultaneously, the adoption of a plurality of raman spectrometers to meet the spectrum acquisition of the targets is difficult to realize.
The prior patent document CN109557078 discloses a rapid multichannel online Raman spectrum detection system, which is characterized in that the detection system comprises an excitation collection light path and an imaging light path. The excitation collection optical path includes a laser generator, a beam expander, a dichroic mirror, and a microscope objective. The imaging light path comprises a light filter, a first lens array, a second lens array, a light filter array and an image sensor which are coaxially arranged. The first lens array is provided with a plurality of lenses for forming channels through which light passes, separating the light of different channels projected on the image sensor from each other. The image sensor can simultaneously obtain imaging data of a plurality of narrow-band channels, and further quickly reconstruct a Raman spectrum spectrogram of a complete and high-resolution spectrum. The detection system can excite the object to be detected by adopting a wide field mode and is directly coupled to the image sensor, so that good dynamic performance and spatial resolution can be obtained. In this solution, the lens array in the detection system determines the acquisition range of the raman spectrum, but this cannot meet the acquisition requirement of the detection system for a plurality of target spectrum information. In addition, the image sensor in the scheme obtains the Raman spectrum of multiple channels at the same time, and further performs conversion calculation on spectrum data. This will greatly increase the processing time of the spectral data and reduce the acquisition efficiency of the raman spectrum.
Therefore, in order to reduce the instrument cost and realize simultaneous detection of a plurality of targets under the condition of ensuring the measurement precision and accuracy, a novel sequential acquisition and multi-channel on-line Raman spectrum acquisition and analysis integrated device is necessary to be provided.
Disclosure of utility model
The utility model aims to solve the technical problem of providing the multichannel online Raman spectrum acquisition and analysis integrated device, which not only can carry out Raman detection on a plurality of samples and effectively improve the efficiency of Raman acquisition and signal analysis processing, but also reduces the volume of the whole device and greatly reduces the instrument cost.
The technical scheme adopted by the utility model for solving the technical problems is to provide a multichannel online Raman spectrum acquisition and analysis integrated device, which comprises a laser, an input optical fiber, a Raman probe group, a sample group, an output optical fiber, a spectrometer and a main control board; the Raman probe group comprises a plurality of Raman probes and is used for simultaneously detecting a plurality of samples in the sample group; each Raman probe is correspondingly connected with one input optical fiber and one output optical fiber to form an acquisition channel; a light gate is arranged between the laser and the multipath input optical fibers, and an optical switch is arranged between the multipath output optical fibers and the spectrometer; the main control board is connected with the laser, the optical gate, the optical switch and the spectrometer; the light emitted by the laser passes through the optical gate, the Raman spectrum formed by scattering of each sample is converged to the output optical fiber through the corresponding Raman probe, and the main control board controls the opening and closing of the acquisition channel through the optical gate and the optical switch, so that the acquired optical signals sequentially enter the spectrometer for spectral measurement and analysis.
Further, the optical gate and the optical switch realize synchronous linkage control through the main control board, when one acquisition channel is opened, other acquisition channels are all in a closed state, and the acquisition time of each acquisition channel is mutually arranged at intervals.
Further, the front end of the Raman probe is provided with an FC connector for connecting a probe rod, and the rear end of the probe is provided with two FC connectors for connecting an input optical fiber and an output optical fiber; the probe rod is made of 304 stainless steel, 316 stainless steel or hastelloy.
Further, the shutter is located on the input fiber between the laser and the raman probe as a beam switch on the incident fiber.
Further, a plurality of FC interfaces are arranged on the spectrometer and are used for connecting a plurality of output optical fibers.
Further, the acquisition channels are four channels, eight channels or twelve channels.
Further, the acquisition channels are four channels, the power of the laser is greater than 2W, and the laser power in each acquisition channel is greater than 500mW.
Compared with the prior art, the utility model has the following beneficial effects: the multichannel online Raman spectrum acquisition and analysis integrated device provided by the utility model adopts the optical switch to control the optical signals in the multichannel, can convert the optical signals in any channel in any sequence, and outputs spectrum information corresponding to a detection sample in a spectrometer. The Raman spectrum acquisition and analysis integrated device effectively reduces the volume of the detection device and the instrument cost; the multi-channel sequential acquisition shortens the processing time of spectrum data and improves the efficiency of Raman detection.
Drawings
FIG. 1 is a diagram of a multi-channel on-line Raman spectrum acquisition and analysis integrated device;
FIG. 2 is a schematic diagram of a four-channel optical fiber, a Raman probe set and a sample set according to the present utility model;
FIG. 3 is a schematic diagram of four-way sequential output acquisition analysis according to the present utility model.
Marked in the figure as: 1. a laser; 2. a shutter; 3. an input optical fiber; 4. a raman probe set; 5. a sample group; 6. an output optical fiber; 7. an optical switch; 8. a spectrometer; 9. and a main control board.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
FIG. 1 is a beam path diagram of the multi-channel on-line Raman spectrum acquisition and analysis integrated device.
Referring to fig. 1, the integrated device for collecting and analyzing multi-channel online raman spectrum provided by the utility model comprises a laser 1, an input optical fiber 3, a raman probe group 4, a sample group 5, an output optical fiber 6, a spectrometer 8 and a main control board 9;
The raman probe group 4 comprises a plurality of raman probes for simultaneously detecting a plurality of samples in the sample group 5; each Raman probe is correspondingly connected with one input optical fiber 3 and one output optical fiber 6 to form an acquisition channel;
A light gate 2 is arranged between the laser 1 and the multi-path input optical fiber 3, and a light switch 7 is arranged between the multi-path output optical fiber 6 and the spectrometer 8; the main control board 9 is connected with the laser 1, the optical gate 2, the optical switch 7 and the spectrometer 8;
The light emitted by the laser 1 passes through the optical gate 2, the raman spectrum formed by scattering of each sample is converged to the output optical fiber 6 through the corresponding raman probe, and the main control board 9 controls the opening and closing of the acquisition channel through the optical gate 2 and the optical switch 7, so that the acquired optical signals sequentially enter the spectrometer 8 for spectral measurement and analysis.
The functions of the components are as follows:
Laser 1: and emitting laser to the Raman spectrum acquisition and analysis device.
Shutter 2: the laser is isolated unidirectionally, and the opening and closing of the optical gate controls the laser input in the device.
Input optical fiber 3: transmitting the signal in the form of optical pulse and transmitting light into the Raman probe.
Raman probe group 4: the Raman signal acquisition device consists of a plurality of Raman probes, and one probe acquires a Raman signal of one sample.
Sample group 5: the sample detection device consists of a plurality of detected samples, and can detect the samples at the same time.
Output optical fiber 6: and receiving the optical signal collected from the sample and transmitting the optical signal to a spectrometer.
Optical switch 7: the optical signals transmitted in the optical fibers are switched, so that the sequential collection of the optical signals in a plurality of channels can be realized.
Spectrometer 8: and carrying out spectrum measurement on the acquired Raman signals, and analyzing spectrum data.
The main control board 9: the laser, shutter, optical switch and spectrometer are controlled in the device.
Referring to fig. 2 and 3, in this embodiment, four FC interfaces are disposed on the laser 1, and the laser 1 is screwed with four optical fibers.
In this embodiment, a shutter 2 is provided after the laser 1 to control the laser 1 laser input to the four acquisition channels.
In this embodiment, each optical fiber in the device is connected to a raman probe, and raman spectrum detection is performed on one sample. The raman probe set 4 can perform spectral detection on four samples simultaneously.
In this embodiment, the raman spectrum information collected from the sample is returned to the raman probe and converged into the output optical fiber by the focusing mirror in the raman probe.
In this embodiment, four output optical fibers in the device are connected with an optical switch, the optical switch receives an instruction of a main control board, and controls signal transmission from the output optical fibers to a spectrometer, so that optical signals of four acquisition channels are selectively blocked, and the optical signals in each channel enter the spectrometer in the order of channel 1, channel 2, channel 3, channel 4, channel 1 and channel 2 … ….
In this embodiment, fig. 2 is a schematic diagram of raman spectrum collection principle. The Raman probe is connected with two optical fibers, namely an input optical fiber and an output optical fiber, and the two optical fibers connected with the same Raman probe form an acquisition channel. If the probe 1 is connected with the input optical fiber 1 and the output optical fiber 1, the probe 1, the input optical fiber 1 and the output optical fiber 1 form an acquisition channel 1.
In this embodiment, the incident laser light sequentially enters each channel under the control of the switch of the shutter 2. The laser 1 excites laser light into only one channel at a time. The opening of the channels is controlled by the optical gate 2, and the channels 1, 2, 3, 4, 1 and … … are sequentially and circularly opened.
In this embodiment, raman collection of each channel is performed sequentially, and only one channel in the collection device has an optical signal. If channel 1 is on, and the acquisition time of channel 1 is set to be one minute, then only optical signals exist in channel 1 in the first minute.
In this embodiment, the acquisition times of each channel are spaced apart from each other. If the acquisition time of the channel 1 is the first minute, the acquisition time of the channel 2 is the second minute, the acquisition time of the channel 3 is the third minute, the acquisition time of the channel 4 is the fourth minute, the acquisition time of the channel 1 is the fifth minute, the acquisition time of the channel 2 is the sixth minute, and the acquisition time of the channel 3 is the seventh minute … … in this cycle.
In this embodiment, the shutter 2 and the optical switch 7 cooperate with each other under the control of the main control board 9 to operate together. The shutter 2 and the optical switch 7 control the opening and closing of the same channel in common. When the channel 1 starts to work, the optical gate 2 and the optical switch 7 respectively control the opening of the inlet and the outlet of the channel 1. After the optical signal collected by the channel 1 enters the spectrometer, the channel 1 is closed and the channel 2 is opened after the collecting work of the channel 1 is finished.
In this embodiment, the device includes four raman probes, which are respectively disposed at the top of four optical fibers. One acquisition channel is formed between the probe and the optical fiber in a one-to-one correspondence manner, and each channel corresponds to one detection sample. In this embodiment, the integrated device includes four channels, so that four target spectrum information can be collected and transmitted simultaneously. The Raman probe gathers the collected Raman spectrum signals to an output optical fiber, and the optical signal is controlled by an optical switch to sequentially output the optical signals to the spectrometer in the sequence of a channel 1, a channel 2, a channel 3 and a channel 4. In this embodiment, four channels are taken as an example, and the multi-channel online raman acquisition and analysis device in the present utility model can be extended to eight channels, twelve channels, and so on.
The on-line Raman spectrum acquisition and analysis device can acquire a plurality of target spectrum information, the optical switch 7 arranged in the device can control optical signals in multiple channels, the optical signals in any channel can be subjected to signal conversion in any sequence, and the spectrum information corresponding to a detection sample is output in the spectrometer 8.
The multichannel online Raman spectrum acquisition and analysis integrated device provided by the utility model integrates the components including the laser 1, the optical gate 2, the optical fiber, the Raman probe, the spectrometer 8, the main control board 9 and the like, so that the volume of the detection device is effectively reduced, and the instrument cost is reduced. The device comprises a plurality of Raman probes, and is respectively connected with an input optical fiber 3 and an output optical fiber 6. The optical fiber and the probe form an acquisition channel, which can detect different samples respectively and transmit the acquired optical signals to the spectrometer 8 for analysis of spectral information. Meanwhile, the optical gate 2 and the optical switch 7 are additionally arranged in the integrated device, the optical gate 2 and the optical switch 7 receive the instruction of the main control panel 9 to jointly control the opening and closing of the acquisition channels, sequential acquisition of the multi-channel on-line Raman acquisition and analysis integrated device is realized, the processing time of spectrum data is shortened, and the efficiency of Raman detection and the stability of optical signal transmission are improved. Each channel continuously works and is not interfered with each other, so that the stability of the spectrum information acquisition and analysis process is improved. The probe rod of the Raman probe adopts 304, 316 stainless steel or hastelloy, is suitable for environments such as high temperature and high pressure, strong acid and strong alkali, strong corrosiveness and the like, and can be widely applied to on-line process control, component monitoring and process optimization in the fields of petrochemical industry, biological pharmacy, chemical energy and the like.
While the utility model has been described with reference to the preferred embodiments, it is not intended to limit the utility model thereto, and it is to be understood that other modifications and improvements may be made by those skilled in the art without departing from the spirit and scope of the utility model, which is therefore defined by the appended claims.
Claims (7)
1. The multichannel online Raman spectrum acquisition and analysis integrated device is characterized by comprising a laser (1), an input optical fiber (3), a Raman probe group (4), a sample group (5), an output optical fiber (6), a spectrometer (8) and a main control board (9);
The Raman probe group (4) comprises a plurality of Raman probes and is used for simultaneously detecting a plurality of samples in the sample group (5); each Raman probe is correspondingly connected with one input optical fiber (3) and one output optical fiber (6) to form an acquisition channel;
An optical gate (2) is arranged between the laser (1) and the multipath input optical fiber (3), and an optical switch (7) is arranged between the multipath output optical fiber (6) and the spectrometer (8); the main control board (9) is connected with the laser (1), the optical gate (2), the optical switch (7) and the spectrometer (8);
The light emitted by the laser (1) passes through the optical gate (2), the Raman spectrum formed by scattering of each sample is converged to the output optical fiber (6) through the corresponding Raman probe, and the main control board (9) controls the opening and closing of the acquisition channel through the optical gate (2) and the optical switch (7) and enables the acquired optical signals to sequentially enter the spectrometer (8) for spectrum measurement and analysis.
2. The integrated device for collecting and analyzing the multichannel online raman spectrum according to claim 1, wherein the optical shutter (2) and the optical switch (7) realize synchronous linkage control through a main control board (9), when one collecting channel is opened, other collecting channels are in a closed state, and collecting time of each collecting channel is set at intervals.
3. The integrated device for collecting and analyzing the multichannel online Raman spectrum according to claim 1, wherein the front end of the Raman probe is provided with an FC connector for connecting a probe rod, and the rear end of the probe is provided with two FC connectors for connecting an input optical fiber (3) and an output optical fiber (6); the probe rod is made of 304 stainless steel, 316 stainless steel or hastelloy.
4. The integrated device for multi-channel online raman spectrum acquisition and analysis according to claim 1, characterized in that the shutter (2) is located on the input fiber (3) between the laser (1) and the raman probe as a beam switch on the incident fiber.
5. The integrated device for multi-channel online raman spectrum acquisition and analysis according to claim 1, wherein a plurality of FC interfaces are arranged on the spectrometer (8) for connecting with a multiplexing output optical fiber (6).
6. The integrated device for multi-channel online raman spectrum acquisition and analysis according to claim 1, wherein the acquisition channels are four channels, eight channels or twelve channels.
7. The integrated device for multi-channel online raman spectroscopy collection and analysis according to claim 6, wherein the collection channels are four channels, the power of the laser (1) is greater than 2W, and the laser power in each collection channel is greater than 500mW.
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| CN202323132071.0U CN221405419U (en) | 2023-11-20 | 2023-11-20 | Multi-channel online Raman spectrum acquisition and analysis integrated device |
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| CN202323132071.0U CN221405419U (en) | 2023-11-20 | 2023-11-20 | Multi-channel online Raman spectrum acquisition and analysis integrated device |
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