Handheld Raman spectrometer

Abstract

The invention discloses a handheld Raman spectrometer, and relates to the technical field of Raman spectrometers, the handheld Raman spectrometer comprises a machine body, a probe arranged on the surface of the machine body and a Raman controller arranged on the machine body, and the Raman controller comprises a laser emission adjusting module, a Raman scattered light detection module, a signal processing and analysis module, a storage module and a display and interaction module; the laser emission adjusting module is used for dynamically adjusting the laser emission power of the handheld Raman instrument according to instrument performance factors and environmental factors of the handheld Raman instrument; and the Raman scattering light detection module is used for converting a Raman scattering light signal into an electric signal and transmitting the electric signal to the signal processing and analyzing module. The laser emission power of the handheld Raman instrument is dynamically adjusted through the Raman controller according to instrument performance factors and environmental factors of the handheld Raman instrument, so that the instrument always keeps the optimal detection performance in different instrument states and use environments, and effective acquisition of Raman scattering light signals is ensured; and the detection accuracy and stability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of Raman spectrometers, and in particular to a handheld Raman spectrometer. Background Art

[0002] Raman spectroscopy is a type of scattering spectrum. Raman spectrometers can accurately analyze the composition and structure of materials by detecting the Raman scattering signals of materials. Handheld Raman spectrometers are widely used in scenes such as rapid on-site detection, field operations, and real-time quality monitoring due to their outstanding portability, greatly improving detection efficiency and flexibility.

[0003] In actual use of existing handheld Raman spectrometers in dusty construction sites, workshops with scattered chemical raw materials, or outdoor environments with high humidity and impurities, the probe, as the core detection component, lacks an effective protection mechanism and is easily corroded by dust and water vapor, or damaged by accidental collisions and scratches, resulting in distortion of detection signals and reduced accuracy. In addition, traditional instruments lack flexibility in laser emission power control and cannot be dynamically adjusted according to instrument performance changes and environmental factors, making it difficult to maintain optimal detection performance under different working conditions. In addition, in terms of data storage and management, local storage capacity is limited, data sharing is inconvenient, and is not conducive to team collaboration and remote diagnosis. Therefore, it is necessary to propose a handheld Raman spectrometer. Summary of the invention

[0004] The purpose of the present invention is to provide a handheld Raman spectrometer in order to solve the above-mentioned technical problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A handheld Raman spectrometer, comprising a body, a probe disposed on the surface of the body, and a Raman controller disposed on the body, characterized in that it also includes: Fixed seat: The fixed seat is arranged on the outside of the probe and is fixedly connected to the surface of the body; A protective cover for covering the probe: a first elastic ring is sleeved on the outer side of the protective cover, a second elastic ring is sleeved on the outer side of the fixing seat, and the first elastic ring and the second elastic ring are connected by an elastic member; The Raman controller includes a laser emission adjustment module, a Raman scattered light detection module, a signal processing and analysis module, a storage module, and a display and interaction module; The laser emission adjustment module is used to dynamically adjust the laser emission power of the handheld Raman instrument according to the instrument performance factors and environmental factors of the handheld Raman instrument; the Raman scattered light detection module is used to convert the Raman scattered light signal into an electrical signal and transmit it to the signal processing and analysis module; The signal processing and analysis module performs spectral matching analysis on the Raman scattered light signal, outputs the detection results and sends them to the storage module; the storage module is used to store the detection results; the display and interaction module displays the detection results stored in the storage module in the form of charts and text.

[0006] As a further description of the above technical solution: The outer surface of the protective cover is provided with a first annular groove matched with the first elastic ring, the outer surface of the fixing seat is provided with a second annular groove matched with the second elastic ring, and the inner side of the protective cover is symmetrically provided with two clamping components matched with the fixing seat; As a further description of the above technical solution: The clamping assembly includes a T-shaped slide bar, a connecting rod and a limit rod. The side wall of the protective cover is provided with an installation groove for installing the T-shaped slide bar. The installation groove is connected to the first annular groove. The T-shaped slide bar is connected to the inner wall of the installation groove through a spring. The elastic force of the spring is less than the elastic force of the first elastic ring. One end of the T-shaped slide bar movably penetrates into the protective cover and is connected to the limit rod through the connecting rod. The inner wall of the fixed seat is used for the clamping groove for clamping the limit rod.

[0007] As a further description of the above technical solution: The laser emission power of the handheld Raman instrument is dynamically adjusted according to the instrument performance factors and environmental factors of the handheld Raman instrument, specifically: Obtain instrument performance factors of handheld Raman spectrometers, including detector sensitivity and optical path transmission efficiency; Set the standard value of any sensitivity or optical transmission efficiency in the instrument performance factors, and subtract the corresponding standard value from the sensitivity or optical transmission efficiency to obtain the corresponding standard deviation value of the sensitivity or optical transmission efficiency; The handheld Raman spectrometer is equipped with a built-in ambient light sensor to monitor the ambient light intensity in real time. The normal ambient light intensity value of the handheld Raman spectrometer is set, and the normal ambient light intensity value is subtracted from the ambient light intensity to obtain the normal ambient light intensity difference value. The light path influence value is obtained by weighted calculation of the standard deviation value corresponding to the sensitivity and light path transmission efficiency and the difference value of the conventional ambient light intensity; Mark the time zone within a preset time length before the current time as the dynamic monitoring time zone; Calculate the statistical indicators of the optical path impact value within the dynamic monitoring time zone; the statistical indicators include maximum value, minimum value, mean value, and standard deviation; The optical path impact value and all the indicators in the statistical indicators are weighted to obtain the optical path comprehensive shadow value; the optical path evaluation range is set, and the optical path comprehensive shadow value is compared with the optical path evaluation range. If the optical path comprehensive shadow value is not within the optical path evaluation range, it is determined that the current optical path is not in a normal working state, and a laser adjustment signaling is generated; The laser adjustment signaling is used to trigger the conversion of the optical path comprehensive shadow value into a dynamic adjustment factor of the laser emission power through a preset conversion algorithm, and trigger the use of the dynamic adjustment factor to dynamically adjust the laser emission power.

[0008] As a further description of the above technical solution: The optical path transmission efficiency is obtained as follows: A calibrated light source is provided in the handheld Raman spectrometer, and micro optical sensors are provided at specific positions along each link of the optical path, hereinafter referred to as optical sensors; The optical transmission system of the handheld Raman instrument is self-checked regularly, and the calibration light source is controlled to be activated. The calibration light pulse moves along the optical transmission path similar to the Raman detection laser. When the calibration light pulse passes through each optical sensor in turn, each optical sensor will instantly convert the sensed light intensity into an electrical signal, and convert the electrical signal into a digital signal through an analog-to-digital converter and mark it as a light intensity value. Arrange the light intensity values ​​collected by each light sensor in time sequence and light path position sequence to obtain a light intensity variation data set of the calibration light transmitted in the light path; Obtain the light intensity value of any adjacent light sensor, subtract the light intensity value of the previous light sensor from the light intensity value of the next light sensor, and divide the light intensity value of the previous light sensor to obtain the light intensity attenuation ratio of the adjacent light sensors; The light intensity attenuation ratios of all adjacent light sensors are averaged and standard deviations are calculated to obtain the light intensity attenuation mean and light intensity attenuation trend values; the light intensity attenuation mean and light intensity attenuation trend values ​​are weightedly calculated to obtain the optical path transmission efficiency.

[0009] As a further description of the above technical solution: The Raman controller is also provided with a supporting remote monitoring platform; the remote monitoring platform includes a cloud storage module, a device registration module, and a remote monitoring module; The cloud storage module is used to encrypt all the test results collected by the handheld Raman spectrometer and upload them to the cloud server for cloud storage; The device registration module is used to submit the device meta information of the handheld Raman spectrometer for verification and registration; the handheld Raman spectrometer that has been successfully verified and registered is marked as a certified operation Raman device; wherein the device meta information includes the device model, serial number, manufacturer, purchase date, and hardware configuration details; The remote monitoring module is used to submit the user's registration information for registration, and generate a cloud login account for the successfully registered user; the cloud login account is used to log in on the smart terminal and remotely view the test results of the authenticated Raman device; The Raman controller is provided with a communication module for communicating with a remote monitoring platform.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention dynamically adjusts the laser emission power of the handheld Raman instrument according to the instrument performance factors and environmental factors of the handheld Raman instrument through the Raman controller, so that the instrument always maintains the best detection performance under different instrument states and usage environments, ensures the effective acquisition of Raman scattered light signals, and improves the accuracy and stability of detection.

[0011] 2. The present invention realizes secure cloud storage and convenient sharing of data by setting up a remote monitoring platform, which is convenient for team collaboration and historical data backtracking. It can remotely view equipment status and test results in real time, improve management decision-making efficiency, and overall improve the use efficiency and management level of handheld Raman spectrometers, expanding their application scope.

[0012] 3. The present invention provides a protective cover to effectively block damage to the probe caused by external dust, water vapor and physical collision, thereby increasing the service life of the probe. Through the coordinated action of the fixed seat, the first elastic ring, the second elastic ring and the elastic member, the elastic ring can be moved by applying a moderate external force, and the protective cover can be opened and closed with the cooperation of the clamping assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of a Raman spectrometer in an installed state of a protective cover provided in an embodiment of the present invention is shown; Figure 2 A schematic diagram of the structure of a Raman spectrometer in a state where a protective cover is separated according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the structure of the protective cover and the fixing seat in the closed state provided by an embodiment of the present invention is shown; Figure 4 It shows a schematic structural diagram of the protective cover and the fixing base in a separated state according to an embodiment of the present invention; Figure 5 A cross-sectional view of a protective cover structure provided according to an embodiment of the present invention is shown; Figure 6 A cross-sectional view of a fixing seat structure provided according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of a local structure of a clamping assembly provided according to an embodiment of the present invention is shown; Figure 8 A principle block diagram of a Raman controller provided according to an embodiment of the present invention is shown.

[0014] Legend: 1. Machine body; 2. Protective cover; 3. Probe; 4. Fixed seat; 5. First elastic ring; 6. Second elastic ring; 7. Elastic member; 8. First annular groove; 9. Second annular groove; 10. Connecting rod; 11. T-shaped sliding rod; 12. Spring; 13. Limit rod; 14. Snap-in groove. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1-Figure 8 As shown, a handheld Raman spectrometer includes a body 1, a probe 3 arranged on the surface of the body 1 and a Raman controller arranged on the body 1, and also includes: Fixed seat 4: The fixed seat 4 is sleeved on the outside of the probe 3 and fixedly connected to the surface of the body 1. The fixed seat 4 is an annular structure. The fixed seat 4 is fixed to the surface of the body 1 by screws or welding. The fixed seat 4 and the probe 3 are coaxially arranged; A protective cover 2 for covering the probe 3: a first elastic ring 5 is sleeved on the outer side of the protective cover 2, and a second elastic ring 6 is sleeved on the outer side of the fixing seat 4. The first elastic ring 5 and the second elastic ring 6 are elastic, which is convenient for installation and disassembly. The first elastic ring 5 and the second elastic ring 6 are connected by an elastic member 7. After the staff opens the protective cover 2, the protective cover 2 is pulled under the connection of the elastic member 7 to prevent the protective cover 2 from being lost after being randomly placed after opening; The Raman controller includes a laser emission adjustment module, a Raman scattered light detection module, a signal processing and analysis module, a storage module, and a display and interaction module; The laser emission adjustment module is used to dynamically adjust the laser emission power of the handheld Raman instrument according to the instrument performance factors and environmental factors of the handheld Raman instrument; the Raman scattered light detection module is used to convert the Raman scattered light signal into an electrical signal and transmit it to the signal processing and analysis module; The signal processing and analysis module performs spectral matching analysis on the Raman scattered light signal, outputs the detection results and sends them to the storage module; it should be noted that the spectral matching algorithm is such as the multivariate linear regression algorithm combined with principal component analysis. In this system, the algorithm extracts and models features from a large number of standard Raman spectral databases of known substances, accurately identifies characteristic peaks in the measured Raman spectra, and then achieves qualitative identification of sample components and quantitative calculation of content; the output detection results are sent to the storage module in the form of standardized data reports based on the requirements of specific application scenarios. In the field of food testing, the test results are accurate to the mass percentage of the main components, and are presented in the form of a detailed list of ingredients and the corresponding content values; in the environmental monitoring scenario, not only a qualitative conclusion is given for the pollutant components, but also its concentration is quantified in units of ppm (parts per million) or ppb (parts per billion) in accordance with relevant standards to ensure that the accuracy and practicality of Raman spectroscopy test results in different industries are met. Therefore, the above algorithm adopts a general algorithm that is mature and widely recognized in the industry, and is not explicitly described in this application; the storage module is used to store the test results; the display and interaction module, the display and interaction module displays the test results stored in the storage module in the form of charts and text.

[0017] Further, the outer surface of the protective cover 2 is provided with a first annular groove 8 which matches with the first elastic ring 5, and the first annular groove 8 is adapted to the first elastic ring 5, and is used for the first elastic ring 5 to be stably fixed in the first annular groove 8; the outer surface of the fixing seat 4 is provided with a second annular groove 9 which matches with the second elastic ring 6, and the second annular groove 9 is adapted to the second elastic ring 6, and is used for the second elastic ring 6 to be stably fixed in the second annular groove 9; and two clamping assemblies which match with the fixing seat 4 are symmetrically provided on the inner side of the protective cover 2; Furthermore, the clamping assembly includes a T-shaped slide bar 11, a connecting rod 10 and a limit rod 13. The side wall of the protective cover 2 is provided with an installation groove for installing the T-shaped slide bar 11, and the installation groove is communicated with the first annular groove 8. The T-shaped slide bar 11 is connected to the inner wall of the installation groove through a spring 12. The elastic force of the spring 12 is less than the elastic force of the first elastic ring 5. One end of the T-shaped slide bar 11 movably penetrates into the protective cover 2 and is connected to the limit rod 13 through the connecting rod 10. The two ends of the connecting rod 10 are respectively threaded or welded to the surfaces of the T-shaped slide bar 11 and the limit rod 13. The inner wall of the fixing seat 4 is used for the clamping groove 14 for the limit rod 13 to be clamped. When in use, after the protective cover 2 covers the upper end of the fixing seat 4, the staff drives the first elastic ring 5 moves downward, so that the first elastic ring 5 is disengaged from the first annular groove 8, and the first elastic ring 5 releases the squeezing of the T-shaped slide bar 11. Under the restoring action of the spring 12, the T-shaped slide bar 11 moves, and the T-shaped slide bar 11 drives the limiting rod 13 to move through the connecting rod 10, so that the limiting rod 13 is clamped into the clamping groove 14, and the protective cover 2 is limited and fixed. When the protective cover 2 needs to be opened, the staff drives the first elastic ring 5 to move upward, so that the first elastic ring 5 is clamped into the first annular groove 8, and then squeezes the T-shaped slide bar 11 to move, and the T-shaped slide bar 11 drives the limiting rod 13 to move through the connecting rod 10, so that the limiting rod 13 is disengaged from the clamping groove 14, and the protective cover 2 can be opened.

[0018] Furthermore, the snap-fitting groove 14 is in a ring shape, and one end of the limiting rod 13 is provided with a chamfered corner that matches the snap-fitting groove 14, so that the limiting rod 13 can quickly snap-fit ​​with the snap-fitting groove 14 to achieve the effect of limiting and restraining the protective cover 2 and ensure the stability of the closed state of the protective cover 2.

[0019] Furthermore, the cross section of the first elastic ring 5 is circular, which makes it convenient for the staff to drive the first elastic ring 5 to separate from the first annular groove 8 .

[0020] Furthermore, the laser emission power of the handheld Raman instrument is dynamically adjusted according to the instrument performance factors and environmental factors of the handheld Raman instrument, specifically: Obtain instrument performance factors of handheld Raman spectrometers, including detector sensitivity and optical path transmission efficiency; Set the standard value of any sensitivity or optical transmission efficiency in the instrument performance factors, and subtract the corresponding standard value from the sensitivity or optical transmission efficiency to obtain the corresponding standard deviation value of the sensitivity or optical transmission efficiency; The handheld Raman spectrometer is equipped with a built-in ambient light sensor to monitor the ambient light intensity in real time. The normal ambient light intensity value of the handheld Raman spectrometer is set, and the normal ambient light intensity value is subtracted from the ambient light intensity to obtain the normal ambient light intensity difference value. The light path influence value is obtained by weighted calculation of the standard deviation value corresponding to the sensitivity and light path transmission efficiency and the difference value of the conventional ambient light intensity; Mark the time zone within a preset time length before the current time as the dynamic monitoring time zone; Calculate the statistical indicators of the optical path impact value within the dynamic monitoring time zone; the statistical indicators include maximum value, minimum value, mean value, and standard deviation; The optical path impact value and all the indicators in the statistical indicators are weighted to obtain the optical path comprehensive shadow value; the optical path evaluation range is set, and the optical path comprehensive shadow value is compared with the optical path evaluation range. If the optical path comprehensive shadow value is not within the optical path evaluation range, it is determined that the current optical path is not in a normal working state, and a laser adjustment signaling is generated; The laser adjustment signaling is used to trigger the conversion of the optical path comprehensive shadow value into a dynamic adjustment factor of the laser emission power through a preset conversion algorithm, and trigger the use of the dynamic adjustment factor to dynamically adjust the laser emission power.

[0021] Furthermore, the optical path transmission efficiency is obtained as follows: A calibrated light source is provided in the handheld Raman spectrometer, and micro optical sensors are provided at specific positions along each link of the optical path, hereinafter referred to as optical sensors; Periodically (e.g., every 10 tests or every 24 hours), the optical transmission system of the handheld Raman instrument is self-checked to control the activation of the calibration light source, and the calibration light pulse moves along the optical transmission path similar to the Raman detection laser; when the calibration light pulse passes through each optical sensor in turn, each optical sensor will instantly convert the sensed light intensity into an electrical signal, and convert the electrical signal into a digital signal through an analog-to-digital converter and mark it as a light intensity value; Arrange the light intensity values ​​collected by each light sensor in time sequence and light path position sequence to obtain a light intensity variation data set of the calibration light transmitted in the light path; Obtain the light intensity value of any adjacent light sensor, subtract the light intensity value of the previous light sensor from the light intensity value of the next light sensor, and divide the light intensity value of the previous light sensor to obtain the light intensity attenuation ratio of the adjacent light sensors; The light intensity attenuation ratios of all adjacent light sensors are averaged and standard deviations are calculated to obtain the light intensity attenuation mean and light intensity attenuation trend values; the light intensity attenuation mean and light intensity attenuation trend values ​​are weightedly calculated to obtain the optical path transmission efficiency.

[0022] Furthermore, the Raman controller is also provided with a supporting remote monitoring platform; the remote monitoring platform includes a cloud storage module, a device registration module, and a remote monitoring module; The cloud storage module is used to encrypt all the test results collected by the handheld Raman spectrometer and upload them to the cloud server for cloud storage, where the cloud server adopts a distributed storage architecture; The device registration module is used to submit the device meta information of the handheld Raman spectrometer for verification and registration; the handheld Raman spectrometer that has been successfully verified and registered is marked as a certified operating Raman device; the device meta information includes the device model, serial number, manufacturer, purchase date, and hardware configuration details; The remote monitoring module is used to submit the user's registration information for registration and generate a cloud login account for the successfully registered user; the cloud login account is used to log in on the smart terminal and remotely view the test results of the certified Raman device; A communication module is set up in the Raman controller for communicating with the remote monitoring platform. It should be noted that the communication module adopts 5G and Wi-Fi6 dual modes to ensure high-speed and stable data transmission in different network environments. For example, in remote areas in the wild, 5G network can be used to transmit data in real time, and it will automatically switch to Wi-Fi6 when there is a Wi-Fi environment indoors, reducing power consumption and increasing transmission bandwidth.

[0023] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A handheld Raman spectrometer, comprising a body (1), a probe (3) arranged on the surface of the body (1), and a Raman controller arranged on the body (1), characterized in that: Also includes: Fixed seat (4): the fixed seat (4) is sleeved on the outside of the probe (3) and fixedly connected to the surface of the body (1); A protective cover (2) for covering the probe (3): a first elastic ring (5) is sleeved on the outer side of the protective cover (2), a second elastic ring (6) is sleeved on the outer side of the fixing seat (4), and the first elastic ring (5) and the second elastic ring (6) are connected via an elastic member (7); The Raman controller includes a laser emission adjustment module, a Raman scattered light detection module, a signal processing and analysis module, a storage module, and a display and interaction module; The laser emission adjustment module is used to dynamically adjust the laser emission power of the handheld Raman instrument according to the instrument performance factors and environmental factors of the handheld Raman instrument; the Raman scattered light detection module is used to convert the Raman scattered light signal into an electrical signal and transmit it to the signal processing and analysis module; The signal processing and analysis module performs spectrum matching analysis on the Raman scattered light signal, outputs the detection result and sends it to the storage module; The storage module is used to store the detection results; The display and interaction module displays the test results stored in the storage module in the form of charts and text.

2. A handheld Raman spectrometer according to claim 1, characterized in that: The outer surface of the protective cover (2) is provided with a first annular groove (8) which cooperates with the first elastic ring (5), the outer surface of the fixing seat (4) is provided with a second annular groove (9) which cooperates with the second elastic ring (6), and the inner side of the protective cover (2) is symmetrically provided with two clamping assemblies which cooperate with the fixing seat (4).

3. A handheld Raman spectrometer according to claim 2, characterized in that: The clamping assembly comprises a T-shaped slide bar (11), a connecting rod (10) and a limiting rod (13); a mounting groove for mounting the T-shaped slide bar (11) is provided on a side wall of the protective cover (2); the mounting groove is communicated with the first annular groove (8); the T-shaped slide bar (11) is connected to the inner wall of the mounting groove via a spring (12); the elastic force of the spring (12) is smaller than the elastic force of the first elastic ring (5); one end of the T-shaped slide bar (11) is movably inserted into the protective cover (2) and is connected to the limiting rod (13) via the connecting rod (10); and a clamping groove (14) for clamping the limiting rod (13) is provided on the inner wall of the fixing seat (4).

4. A handheld Raman spectrometer according to claim 3, characterized in that: The clamping groove (14) is in a ring shape, and one end of the limiting rod (13) is provided with a rounded corner that matches the clamping groove (14).

5. A handheld Raman spectrometer according to claim 1, characterized in that: The first elastic ring (5) has a circular cross-section.

6. A handheld Raman spectrometer according to claim 1, characterized in that: The laser emission power of the handheld Raman instrument is dynamically adjusted according to the instrument performance factors and environmental factors of the handheld Raman instrument, specifically: Obtain instrument performance factors of handheld Raman spectrometers, including detector sensitivity and optical path transmission efficiency; Set the standard value of any sensitivity or optical transmission efficiency in the instrument performance factors, and subtract the corresponding standard value from the sensitivity or optical transmission efficiency to obtain the corresponding standard deviation value of the sensitivity or optical transmission efficiency; The handheld Raman spectrometer is equipped with a built-in ambient light sensor to monitor the ambient light intensity in real time. The normal ambient light intensity value of the handheld Raman spectrometer is set, and the normal ambient light intensity value is subtracted from the ambient light intensity to obtain the normal ambient light intensity difference value. The light path influence value is obtained by weighted calculation of the standard deviation value corresponding to the sensitivity and light path transmission efficiency and the difference value of the conventional ambient light intensity; Mark the time zone within a preset time length before the current time as the dynamic monitoring time zone; Calculate the statistical indicators of the optical path impact value within the dynamic monitoring time zone; the statistical indicators include maximum value, minimum value, mean value, and standard deviation; The optical path impact value is weightedly calculated with all the indicators in the statistical index to obtain the optical path comprehensive value; Set the optical path evaluation range, compare the optical path comprehensive shadow value with the optical path evaluation range, if the optical path comprehensive shadow value is not within the optical path evaluation range, it is determined that the current optical path is not in a normal working state, and a laser adjustment signaling is generated; The laser adjustment signaling is used to trigger the conversion of the optical path comprehensive shadow value into a dynamic adjustment factor of the laser emission power through a preset conversion algorithm, and trigger the use of the dynamic adjustment factor to dynamically adjust the laser emission power.

7. A handheld Raman spectrometer according to claim 6, characterized in that: The optical path transmission efficiency is obtained as follows: A calibrated light source is provided in the handheld Raman spectrometer, and micro optical sensors are provided at specific positions along each link of the optical path, hereinafter referred to as optical sensors; The optical transmission system of the handheld Raman instrument is self-checked regularly, and the calibration light source is controlled to be activated. The calibration light pulse moves along the optical transmission path similar to the Raman detection laser. When the calibration light pulse passes through each optical sensor in turn, each optical sensor will instantly convert the sensed light intensity into an electrical signal, and convert the electrical signal into a digital signal through an analog-to-digital converter and mark it as a light intensity value. Arrange the light intensity values ​​collected by each light sensor in time sequence and light path position sequence to obtain a light intensity variation data set of the calibration light transmitted in the light path; Obtain the light intensity value of any adjacent light sensor, subtract the light intensity value of the previous light sensor from the light intensity value of the next light sensor, and divide the light intensity value of the previous light sensor to obtain the light intensity attenuation ratio of the adjacent light sensors; The light intensity attenuation ratios of all adjacent light sensors are averaged and standard deviations are calculated to obtain the light intensity attenuation mean and light intensity attenuation trend values; the light intensity attenuation mean and light intensity attenuation trend values ​​are weightedly calculated to obtain the optical path transmission efficiency.

8. The handheld Raman spectrometer according to claim 1, characterized in that: The Raman controller is also provided with a supporting remote monitoring platform; the remote monitoring platform includes a cloud storage module, a device registration module, and a remote monitoring module; The cloud storage module is used to encrypt all the test results collected by the handheld Raman spectrometer and upload them to the cloud server for cloud storage; The device registration module is used to submit device meta information of the handheld Raman spectrometer for verification and registration; the handheld Raman spectrometer that has been successfully verified and registered is marked as a certified operating Raman device; The device meta information includes device model, serial number, manufacturer, purchase date, and hardware configuration details; The remote monitoring module is used to submit the user's registration information for registration, and generate a cloud login account for the successfully registered user; the cloud login account is used to log in on the smart terminal and remotely view the test results of the authenticated Raman device; The Raman controller is provided with a communication module for communicating with a remote monitoring platform.

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