Spectrometer based on steady-state pulsed light source driving and spectral acquisition method

Abstract

This invention provides a spectrum analyzer and spectrum acquisition method based on steady-state pulsed light source driving. The spectrum analyzer includes a main control unit, a light source module, a light source driving module, and a spectrum acquisition module, with each component connected according to signal and power supply relationships. The main control unit outputs a PWM signal to drive the light source to work, bringing it into a thermal equilibrium steady state. A hardware state manager caches the driving parameters, ensuring uninterrupted PWM signal output during continuous acquisition, avoiding light intensity fluctuations and phase shifts. The spectrum acquisition module's integration time covers multiple complete PWM cycles, and combined with averaging of multiple acquired data, effectively smooths signal fluctuations and reduces noise. This invention improves upon the shortcomings of traditional driving methods, such as light source temperature rise, light intensity attenuation, and wavelength drift, enhancing the stability, repeatability, and signal-to-noise ratio of spectral detection. It is suitable for rapid on-site spectral detection of agricultural products, traditional Chinese medicine, and other materials.

Description

Technical Field

[0001] This invention relates to the field of visible-infrared spectroscopy detection technology, and in particular to a spectral analyzer and spectral acquisition method driven by a steady-state pulsed light source. Background Technology

[0002] In existing spectral detection systems, the light source is typically driven by a DC constant current to provide continuous illumination. However, in portable or handheld spectrometers, this method easily leads to a continuous increase in the junction temperature of the light source during continuous operation, resulting in intensity attenuation and wavelength drift in the spectral output, affecting the stability and repeatability of the measurement results. To improve light source brightness or reduce power consumption, some existing technologies attempt to drive the light source using pulsed or flash methods. However, these solutions mostly focus on the emission control of the light source itself or the needs of transient exposure, mainly used for single measurements or adjustment of the light source output characteristics, and are not designed for the continuous multiple acquisition scenarios in spectral analysis applications.

[0003] Especially during the spectral acquisition process, if the light source driving parameters are re-initialized for each acquisition, it is easy to introduce problems such as light intensity jitter and inconsistent thermal state. At the same time, existing technologies generally lack consideration of the synergistic relationship between the light source driving period and the spectral integration time, making it difficult to obtain stable and high signal-to-noise ratio spectral data under pulse driving conditions. Summary of the Invention

[0004] To address the shortcomings of the existing technologies, this invention provides a spectrum analyzer and spectrum acquisition method based on steady-state pulsed light source driving, aiming to overcome the problems of poor spectral stability, low signal-to-noise ratio, and insufficient repeatability caused by existing light source driving methods, so that the light source maintains a stable thermal equilibrium state under high brightness, and achieves high signal-to-noise ratio spectrum acquisition through parameter locking and integration synchronization.

[0005] To achieve the above objectives, the present invention provides a spectrometer driven by a steady-state pulsed light source, comprising:

[0006] The system includes a main control unit, a light source driving module, and a spectrum acquisition module, wherein the main control unit is signal-connected to the light source driving module and the spectrum acquisition module, respectively.

[0007] The light source module is electrically connected to the light source driving module to provide power and drive it.

[0008] The main control unit is configured to output a pulse width modulation (PWM) signal with preset parameters to drive the light source module, so that the light source module works under periodic on and off conditions and enters a thermal equilibrium steady state.

[0009] The spectral acquisition module is configured to integrate and acquire the reflected or transmitted light of the sample within a preset integration time, and the integration time is longer than one cycle of the PWM signal, so that each integration covers multiple complete PWM cycles, thereby obtaining stable spectral data.

[0010] In some embodiments, the frequency range of the PWM pulse control signal is 100Hz to 200Hz and the duty cycle is 10% to 80%.

[0011] In some embodiments, the light source driving module outputs an instantaneous driving current during the PWM conduction period, and the instantaneous driving current is 150% to 200% of the rated continuous operating current of the light source module.

[0012] In some embodiments, the integration time satisfies: Tint ≥ k × Tpwm, where Tpwm is the period of the PWM signal and k is an integer greater than or equal to 2, such that each spectral integration covers at least two complete PWM cycles.

[0013] In some embodiments, the main control unit is configured to perform multiple integral acquisitions during continuous spectral acquisition and to average the spectral data obtained from the multiple integral acquisitions.

[0014] In some embodiments, the main control unit includes a hardware state manager configured to compare the new light source driving parameters with cached historical light source driving parameters when a new spectral acquisition command is received, and only reconfigure the PWM signal if the two are inconsistent.

[0015] In some embodiments, when the new light source driving parameters are consistent with the historical light source driving parameters, the main control unit controls the light source driving module to maintain the current PWM output state in order to avoid phase drift and light intensity fluctuations caused by PWM re-initialization.

[0016] In some embodiments, the light source module is a broadband light-emitting diode light source or a multi-band combined light source, suitable for reflective or transmissive spectral detection.

[0017] In some embodiments, the spectrometer further includes a power supply module, which is connected to the main control unit, the light source driving module, and the spectrometer acquisition module for power supply and battery status monitoring.

[0018] Another embodiment of the present invention provides a spectral acquisition method based on steady-state pulsed light source driving, applied to the spectral analyzer described above, the spectral acquisition method comprising the following steps:

[0019] S1. Configure and cache the light source pulse drive parameters, and drive the light source pulse through the light source drive module via the main controller to make the light source reach thermal equilibrium steady state;

[0020] S2. Set the spectral integration time based on the pulse period so that a single integration covers at least two complete pulse periods;

[0021] S3. Under the steady-state pulse continuous output state of the light source, control the spectrum acquisition module to complete multiple spectrum acquisitions;

[0022] S4. Average the spectral data collected multiple times to obtain the high signal-to-noise ratio spectrum after noise reduction.

[0023] In some embodiments, when a new acquisition task is received in step S1, the driving parameters to be used and the cache parameters are compared. If the parameters are consistent, the existing pulse output is directly used without reconfiguration or preheating of the light source.

[0024] In some embodiments, the acquisition process in step S3 acquires the driving current and the temperature of the light source in real time, and corrects the pulse parameters based on the acquired data in a closed loop to stabilize the output light intensity of the light source.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The steady-state pulsed light source-driven spectrometer provided by this invention is a handheld spectrometer designed for portable spectroscopic detection applications. It achieves stable output of spectral signals through synchronous control of steady-state pulsed light source driving and spectral acquisition. Under pulsed driving conditions, it can maintain thermal equilibrium steady state of the light source during continuous acquisition and achieve high stability and high repeatability of spectral acquisition through coordinated control with the spectral integration mechanism. Attached Figure Description

[0027] Figure 1 This is an overall structural diagram of a spectrum analyzer driven by a steady-state pulsed light source, as shown in an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram illustrating the timing relationship between the steady-state pulse drive of the light source PWM and the spectral integration time in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the overall workflow of the spectral acquisition method based on steady-state pulsed light source driving, as shown in an embodiment of the present invention.

[0030] Figure 4 This is a flowchart of the spectral acquisition process for light source parameter caching and state management as shown in an embodiment of the present invention;

[0031] Figure 5This is a schematic diagram comparing the wavelength-absorbance characteristics of samples under different light source driving methods in an embodiment of the present invention. Figure 1 ;

[0032] Figure 6 This is a schematic diagram comparing the wavelength-absorbance characteristics of samples under different light source driving methods in an embodiment of the present invention. Figure 2 ;

[0033] In the attached figures, the following labels are used:

[0034] 100 - Main Control Unit;

[0035] 101 - Light source driver module;

[0036] 102 - Spectral Acquisition Module;

[0037] 103 - Light Source Module;

[0038] 104 - Power Supply Module;

[0039] S1-S4: Steps. Detailed Implementation

[0040] See Figure 1-6 This embodiment provides a spectrometer driven by a steady-state pulsed light source, including: a main control unit 100, a light source driving module 101, and a spectrometer acquisition module 102. The main control unit 100 is signal-connected to the light source driving module 101 and the spectrometer acquisition module 102 respectively; a light source module 103 is provided, and the light source driving module 101 and the light source module 103 are electrically connected to achieve power supply and driving; wherein, the main control unit 100 is configured to output a pulse width modulation (PWM) signal with preset parameters to drive the light source module, so that the light source module 103 operates under periodic on and off conditions and enters a thermal equilibrium steady state; the spectrometer acquisition module 102 is configured to integrate and acquire the reflected or transmitted light of the sample within a preset integration time, and the integration time is greater than one cycle of the PWM signal, so that each integration covers multiple complete PWM cycles, thereby obtaining stable spectral data.

[0041] Specifically, in this embodiment, the main control unit is configured to generate a pulse width modulation (PWM) signal with a preset frequency and duty cycle to drive the light source module, enabling the light source module to operate under periodic on and off conditions and enter a thermal equilibrium steady state. The light source driving module provides a pulsed drive current to the light source module during the conduction period of the PWM signal, and the pulsed drive current is higher than the operating current level in continuous DC drive mode. In this embodiment, the spectral acquisition module is used to acquire spectral data of sample reflection or transmission, the light source module is used to emit broadband light to the sample, the light source driving module performs current modulation and energy management of the light source module according to the control signal, and the main control unit is used to connect the spectral acquisition module and the light source module.

[0042] Figure 1 This diagram illustrates the overall structure of a steady-state pulsed light source-driven spectrometer according to an embodiment of the present invention. The diagram shows the signal flow and functional relationships between the main control unit, the light source module, the light source driving module, the spectral acquisition module, the power supply module, and the sample. Through this structural arrangement, the present invention tightly couples the steady-state pulsed light source driving technology with the spectral integration acquisition mechanism, achieving highly stable light source output, highly consistent sampling, and high signal-to-noise ratio spectrum generation in a portable spectrometer under low power consumption conditions. This system is simple and reliable, suitable for applications such as agricultural product testing, identification of traditional Chinese medicine, material classification, and rapid quality control.

[0043] In this embodiment, the frequency range of the PWM pulse control signal is 100Hz to 200Hz, and the duty cycle is 10% to 80%. The light source driving module outputs an instantaneous driving current during the PWM conduction period, and the instantaneous driving current is 150% to 200% of the rated continuous operating current of the light source module.

[0044] In this embodiment, the integration time satisfies: Tint ≥ k × Tpwm, where Tpwm is the period of the PWM signal, and k is an integer greater than or equal to 2, so that each spectral integration covers at least two complete PWM cycles.

[0045] In this embodiment, the main control unit is configured to perform multiple integral acquisitions during continuous spectral acquisition and to average the spectral data obtained from the multiple integral acquisitions in order to reduce random noise and improve the spectral signal-to-noise ratio.

[0046] In this embodiment, the main control unit includes a hardware state manager. The hardware state manager is configured to compare the new light source driving parameters with the cached historical light source driving parameters when a new spectral acquisition command is received, and only reconfigure the PWM signal if the two are inconsistent. The hardware state manager is used to cache the current light source driving parameters and maintain the continuous and uninterrupted output of the PWM signal during continuous spectral acquisition to avoid phase jitter and light intensity changes introduced by PWM reinitialization.

[0047] When the new light source driving parameters are consistent with the historical light source driving parameters, the main control unit controls the light source driving module to maintain the current PWM output state to avoid phase drift and light intensity fluctuations caused by PWM reinitialization. The light source module is a wide-band light-emitting diode light source or a multi-band combined light source, suitable for reflective or transmissive spectral detection. The spectral analyzer in this embodiment also includes a power supply module 104, which is connected to the main control unit 100, the light source driving module 101, and the spectral acquisition module 102 for power supply and battery status monitoring.

[0048] For details, see Figure 2 , Figure 2 This diagram illustrates the timing relationship between the steady-state pulse drive of the light source's PWM and the spectral integration time, as shown in this embodiment of the invention. The diagram demonstrates the periodic pulse output of the light source under PWM drive with a fixed frequency and duty cycle, and how the integration window of the spectral acquisition module covers multiple complete PWM cycles to smooth pulse fluctuations and obtain a stable spectral signal using the time integration effect. The PWM cycle is T, and the duty cycle is D = T(on) / T. During the on-time (Ton) interval, the drive circuit provides a pulse current higher than the DC operating current to the light source. During the off-time (Toff) interval, the drive current is zero, allowing the light source to release heat between two pulses. Under the continuous action of the PWM cycle, the junction temperature of the light source gradually stabilizes in the dynamic balance between Ton and Toff, forming the thermal equilibrium steady state described in this embodiment.

[0049] To effectively eliminate the influence of pulse fluctuations, this embodiment sets the following:

[0050] Tint ≥ k × Tpwm (where k ≥ 2)

[0051] This means that each integration window must cover multiple complete PWM cycles. The purposes of this are as follows:

[0052] The average energy of multiple pulse cycles is accumulated into a single integration, making the output signal equivalent to a stable DC light source. If slight waveform differences or noise exist between pulses, the integration naturally smooths out random errors. A longer integration time accumulates more photons, thus reducing the proportion of photon noise. Multiple measurements are then averaged again to further improve the signal-to-noise ratio. Through the synergistic design of the PWM steady-state pulse and integration time, this embodiment enables a handheld spectrometer to obtain a high-brightness, high-stability, and high-repeatability spectral signal under limited power consumption conditions. This structure is significantly different from traditional DC-driven or single-pulse excitation light sources and is suitable for field spectral detection equipment with high stability requirements.

[0053] In this embodiment, the main control unit is configured to generate a pulse width modulation (PWM) steady-state pulse signal with a preset frequency and duty cycle to drive the light source, enabling the light source to enter a thermal equilibrium steady state. During PWM conduction, it outputs an instantaneous excitation current higher than the rated DC current to obtain high luminous flux. A hardware state manager is configured to cache the light source driving parameters (frequency, duty cycle, current value) to maintain continuous and uninterrupted PWM output during continuous acquisition, avoiding jitter caused by re-initialization. The integration time of the spectral acquisition module is controlled to cover multiple complete PWM cycles, utilizing the integral effect to smooth the pulse output and achieve high signal-to-noise ratio acquisition.

[0054] In addition, the main control unit in this embodiment is configured with a steady-state pulse drive mechanism for the light source, with a PWM frequency range of 100–200 Hz, a duty cycle of 10%–80%, and an instantaneous drive current of 150%–200% of the rated DC current. This drive method causes the LED junction temperature to oscillate within a limited periodic range and enter a thermal equilibrium steady state within tens of milliseconds. An integral synchronization mechanism is also configured, setting the spectral integration time Tint to satisfy: Tint ≥ k × Tpwm (k≥2, Tpwm is the PWM period), which ensures that each integration covers multiple complete pulse cycles, thereby achieving energy averaging and noise suppression of the pulse signal.

[0055] See Figure 3 Another embodiment of the present invention provides a spectral acquisition method based on steady-state pulsed light source driving, applied to the spectral analyzer described in the above embodiment. The spectral acquisition method includes the following steps:

[0056] S1. Configure and cache the light source pulse drive parameters, and drive the light source pulse through the light source drive module via the main controller to make the light source reach thermal equilibrium steady state;

[0057] S2. Set the spectral integration time based on the pulse period so that a single integration covers at least two complete pulse periods;

[0058] S3. Under the steady-state pulse continuous output state of the light source, control the spectrum acquisition module to complete multiple spectrum acquisitions;

[0059] S4. Average the spectral data collected multiple times to obtain the high signal-to-noise ratio spectrum after noise reduction.

[0060] In step S1, when a new acquisition task is received, the driving parameters to be used are compared with the cache parameters. If the parameters are consistent, the existing pulse output is directly used without reconfiguration or preheating of the light source. In step S3, the driving current and light source temperature are acquired in real time during the acquisition process. Based on the acquired data, the pulse parameters are corrected in a closed loop to stabilize the light intensity output by the light source.

[0061] Specifically, the steps of the spectral acquisition method provided in this embodiment include: setting the PWM frequency, duty cycle, and drive current to enable the light source to operate in steady-state pulse mode; maintaining continuous output of the PWM signal to enable the light source to enter a thermal equilibrium steady state; setting the integration time of the spectral acquisition module to an integer multiple of the PWM period; performing N consecutive scans and averaging the N spectral results to obtain high signal-to-noise ratio spectral data.

[0062] Figure 4 This is a flowchart illustrating the spectral acquisition process of light source parameter caching and state management in an embodiment of the present invention. The flowchart demonstrates how the main control unit, upon receiving the acquisition command, analyzes, compares, and maintains the state of the light source driving parameters, and coordinates with the spectral acquisition module to ensure the light source completes multiple stable samplings and outputs high signal-to-noise ratio spectral data under thermal equilibrium steady-state conditions. Through this process, the present invention establishes a close collaborative relationship between light source driving, thermal equilibrium maintenance, and spectral acquisition timing. The parameter caching and state management mechanism eliminates phase jitter caused by PWM reinitialization, ensuring a stable and consistent output from the light source during multiple acquisitions. Combined with integration time covering multiple pulse cycles and multiple scan averaging, high repeatability and high signal-to-noise ratio spectral data acquisition are achieved, solving the problems of energy consumption, unstable light intensity, and insufficient repeatability in traditional handheld spectrometers.

[0063] Figure 5 This is a schematic diagram comparing the wavelength-absorbance characteristics of samples under different light source driving methods in an embodiment of the present invention. Figure 1 , Figure 6 This is a schematic diagram comparing the wavelength-absorbance characteristics of samples under different light source driving methods in an embodiment of the present invention. Figure 2 ; Figure 5 The 20 absorbance spectra obtained under normal constant current driven light source conditions are as follows: Figure 6The 20 absorbance spectra obtained under the steady-state pulse-driven light source conditions described in this embodiment of the invention are shown in the comparison. It can be seen that, under the same sample conditions, the absorbance spectra obtained using the steady-state pulse-driven method are superior to those obtained using the ordinary constant-current driven method in terms of overall amplitude stability and spectral consistency.

[0064] Furthermore, a more specific embodiment of the spectral analyzer based on steady-state pulsed light source driving provided by the present invention will be used to illustrate the invention, which includes the following main components:

[0065] Main Control Unit (MCU): Employs an embedded microcontroller. The main control unit is responsible for running hardware status management logic and data processing algorithms;

[0066] Light source module: A single high-brightness wide-band LED (light emission range covering 680~1030nm) is used as the excitation light source;

[0067] Light source driver module: Consists of a constant current driver chip that accepts PWM signal modulation. This circuit can boost the instantaneous drive current to approximately 150-200% of the LED's rated maximum DC current;

[0068] Spectrum acquisition module (Spectrometer Sensor): Employs a high-precision grating array spectrometer with a spectral range of 350~1050nm;

[0069] Power supply module: Provides a stable power supply and monitors battery status.

[0070] The core of the spectrum analyzer system based on steady-state pulse light source driving provided in this embodiment of the invention lies in the hardware state manager and hardware management module, which are used to realize steady-state pulse driving.

[0071] The main control unit maintains a light source status cache in its memory, containing preset values ​​for the following key parameters: drive frequency set to 150Hz; duty cycle set to 20%; drive current set to 250mA; and a record of whether the light source has been activated.

[0072] When the main control unit receives the acquisition command and the target parameters are inconsistent with the status cache, the hardware management module will perform the following operations: clear the old PWM instance and set the drive current to 250mA; restart the PWM output at a frequency of 150Hz and a duty cycle of 20%; and perform a short thermal equilibrium wait to ensure that the light source reaches a stable thermal equilibrium state in the new pulse mode.

[0073] During continuous acquisition or repeated measurement, if the target parameters are consistent with the buffer and the light source is turned on, the hardware state manager instructs the system to skip the initialization step, and the PWM output of the light source remains continuous and uninterrupted to maintain its thermal equilibrium steady state.

[0074] The spectral acquisition steps based on a steady-state pulsed light source provided in this embodiment of the invention are as follows: High signal-to-noise ratio acquisition is achieved through a steady-state pulsed light source and an optimized integration strategy, as follows:

[0075] Receive and parse target parameters. The main control unit receives the acquisition command and confirms the target light source parameters as follows: .

[0076] Hardware status check and steady-state maintenance. Execute steady-state pulse drive logic to ensure the light source is in thermal equilibrium steady state at 150Hz and 20% duty cycle.

[0077] To effectively smooth the pulse signal, the integration time T of the spectral acquisition module is set. int =33ms.

[0078] Steady-state integral acquisition triggers the spectral acquisition module to begin exposure integration during the continuous and stable pulse output of the light source.

[0079] Repeated acquisition and data averaging: To further improve accuracy, the system controls the spectral acquisition module to perform N = 16 repeated scans. Since the light source maintains a steady thermal equilibrium throughout the N scans, the consistency of each scan is extremely high. The data from the N scans are then averaged to filter out random noise to the maximum extent, outputting the final high signal-to-noise ratio spectral data.

[0080] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A spectrometer driven by a steady-state pulsed light source, characterized in that: include: The system includes a main control unit, a light source driving module, and a spectrum acquisition module, wherein the main control unit is signal-connected to the light source driving module and the spectrum acquisition module, respectively. The light source module is electrically connected to the light source driving module to provide power and drive it. The main control unit is configured to output a pulse width modulation (PWM) signal with preset parameters to drive the light source module, so that the light source module works under periodic on and off conditions and enters a thermal equilibrium steady state. The spectral acquisition module is configured to integrate and acquire the reflected or transmitted light of the sample within a preset integration time, and the integration time is greater than one cycle of the PWM signal, so that each integration covers multiple complete PWM cycles, thereby obtaining stable spectral data.

2. The spectrometer based on steady-state pulsed light source driving according to claim 1, characterized in that: The frequency range of the PWM pulse control signal is 100Hz to 200Hz, and the duty cycle is 10% to 80%.

3. The spectrometer based on steady-state pulsed light source driving according to claim 2, characterized in that: The light source driving module outputs an instantaneous driving current during the PWM conduction period, and the instantaneous driving current is 150% to 200% of the rated continuous operating current of the light source module.

4. The spectrometer based on steady-state pulsed light source driving according to claim 1, characterized in that: The integration time satisfies: Tint ≥ k × Tpwm, where Tpwm is the period of the PWM signal, and k is an integer greater than or equal to 2, so that each spectral integration covers at least two complete PWM cycles.

5. The spectrometer based on steady-state pulsed light source driving according to claim 1, characterized in that: The main control unit is configured to perform multiple integral acquisitions during continuous spectral acquisition and to average the spectral data obtained from the multiple integral acquisitions.

6. The spectrometer based on steady-state pulsed light source driving according to claim 1, characterized in that: The main control unit includes a hardware state manager, which is configured to compare the new light source driving parameters with the cached historical light source driving parameters when a new spectral acquisition command is received, and only reconfigure the PWM signal if the two are inconsistent.

7. The spectrometer based on steady-state pulsed light source driving according to claim 6, characterized in that: When the new light source driving parameters are consistent with the historical light source driving parameters, the main control unit controls the light source driving module to maintain the current PWM output state in order to avoid phase drift and light intensity fluctuation caused by PWM re-initialization.

8. The spectrometer based on steady-state pulsed light source driving according to claim 1, characterized in that: The light source module is a broadband light-emitting diode light source or a multi-band combined light source, suitable for reflective or transmissive spectral detection.

9. The spectrometer based on steady-state pulsed light source driving according to claim 1, characterized in that: The spectrometer also includes a power supply module, which is connected to the main control unit, the light source driving module, and the spectrometer acquisition module for power supply and battery status monitoring.

10. A spectral acquisition method based on steady-state pulsed light source driving, characterized in that: Applied to the spectrometer as described in any one of claims 1-9, the spectrometer acquisition method comprises the following steps: S1. Configure and cache the light source pulse drive parameters, and drive the light source pulse through the light source drive module via the main controller to make the light source reach thermal equilibrium steady state; S2. Set the spectral integration time based on the pulse period so that a single integration covers at least two complete pulse periods; S3. Under the steady-state pulse continuous output state of the light source, control the spectrum acquisition module to complete multiple spectrum acquisitions; S4. Average the spectral data collected multiple times to obtain the high signal-to-noise ratio spectrum after noise reduction.

11. The spectral acquisition method based on steady-state pulsed light source driving according to claim 10, characterized in that: When a new acquisition task is received in step S1, the driving parameters to be used and the cache parameters are compared. If the parameters are consistent, the existing pulse output is directly used without reconfiguration or preheating of the light source.

12. The spectral acquisition method based on steady-state pulsed light source driving according to claim 10, characterized in that: In step S3, the driving current and the temperature of the light source are collected in real time. Based on the collected data, the pulse parameters are corrected in a closed loop to stabilize the output light intensity of the light source.

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