Compact multispectral light source and application thereof

Abstract

The invention relates to the technical field of water quality spectrum detection, and discloses a compact multispectral light source and application thereof, the compact multispectral light source comprises a compact multispectral light source, and an LED ultraviolet light source is arranged at the center of the inner wall of the compact multispectral light source. According to the light source scheme of integrating the single-wavelength ultraviolet LED light source with the narrow-band fluorescent light-emitting module, the internal problems of other existing schemes based on integration of LEDs with multiple wavelengths are solved, and the light source scheme is mainly characterized in that only a single LED needs to be optimized in circuit design; complexity caused by different working voltages required by integration of a plurality of LEDs with different wavelengths is reduced, the emission wavelength is changed by rotating the narrowband fluorescence module 4, the consistency of the light path position is maintained, the detection precision and repeatability are improved, and based on the optimization scheme, a single ultraviolet LED is used as a basic light source, and the detection accuracy and repeatability are improved. The narrow-band fluorescent modules 4 are combined, so that a multispectral light source function is realized.

Description

Technical Field

[0001] The invention relates to the technical field of water quality spectrum detection, and in particular to a compact multi-spectrum light source and application thereof. Background Art

[0002] Multispectral water quality testing is a technology that uses the spectral characteristics generated by the interaction of different wavelengths of light with different substances in the water body to analyze water quality parameters. This method can provide fast, large-scale, and dynamic water quality monitoring and management. With the research progress of spectral multi-parameter water quality detection technology, the design requirements of light source components, as the core part of the detection system, are constantly improving. In important application scenarios involving on-site water quality testing, including pollutant tracing and online monitoring, the equipment needs to be miniaturized and portable, but the light source module of traditional spectrometers is large in size and high in energy consumption, so the optimization of spectral components is particularly important.

[0003] One of the most commonly used light source solutions is to integrate LEDs with different emission wavelengths to form a discrete light source covering the ultraviolet-visible light region. However, due to the different operating voltages of LEDs with different wavelengths, the circuit design is relatively complicated. In addition, due to the different positions of different LEDs, the optical path position changes when using different excitation lights, which has a potential adverse effect on the detection accuracy. In addition, due to the high degree of integration, when the emission of an LED light source of any wavelength fails, the entire light source module needs to be replaced, resulting in high costs and cumbersome maintenance. Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides a compact multi-spectral light source and its application, which has the advantages of greatly reducing the complexity of the power supply circuit, achieving consistency of the optical path under different wavelengths, and reducing the difficulty and cost of maintenance. Based on this optimization scheme, the advantages of miniaturization, portability and on-site application of three-dimensional fluorescence detection and multi-spectral water quality detection equipment can be promoted, and the problems of complex circuit design, changes in the optical path position when using different excitation lights due to the different positions of different LEDs, which has a potential adverse effect on the detection accuracy, high cost and cumbersome maintenance are solved.

[0005] (II) Technical solution In order to solve the technical problems that the above circuit design is relatively complex, and due to the different positions of different LEDs, the optical path position changes when using different excitation lights, which has a potential adverse effect on the detection accuracy, high cost and cumbersome maintenance, the present invention provides the following technical solutions: A compact multi-spectrum light source and application thereof, comprising a compact multi-spectrum light source, wherein an LED ultraviolet light source is arranged at the center of the inner wall of the compact multi-spectrum light source, a servo motor is arranged at the bottom of the compact multi-spectrum light source, a narrow-band fluorescent module is arranged on the compact multi-spectrum light source, and a metal tube waveguide is arranged on the compact multi-spectrum light source.

[0006] Preferably, a cuvette is provided on the outer surface of the compact multi-spectral light source, and a spectrometer and a strong light detection device are provided on one side of the cuvette.

[0007] Preferably, the wavelength of the LED ultraviolet light source is 254 nanometers, the compact multi-spectrum light source is a cylindrical rotating mechanism, and the LED ultraviolet light source is located at the rotation center of the compact multi-spectrum light source.

[0008] Preferably, the narrow-band fluorescent module is at the same height as the LED ultraviolet light source, and the number of the narrow-band fluorescent modules is 17, which are arranged around the circumference of the compact multi-spectrum light source.

[0009] Preferably, the narrow-band fluorescent module is prepared from narrow-band fluorescent powders with different emission wavelengths, and its excitation wavelength is 254 nm.

[0010] Preferably, the LED ultraviolet light source and the narrow-band fluorescent module are connected via a metal tube waveguide.

[0011] (III) Beneficial effects Compared with the prior art, the present invention provides a compact multi-spectral light source and its application, which has the following beneficial effects: 1. The present invention overcomes the inherent problems of other existing solutions based on the integration of multiple wavelength LEDs by proposing a light source solution of a single-wavelength ultraviolet LED light source integrated with a narrow-band fluorescent light-emitting module. The main problems are that the circuit design only needs to be optimized for a single LED, reducing the complexity caused by the different operating voltages required for integrating multiple LEDs with different wavelengths. The emission wavelength is changed by rotating the narrow-band fluorescent module, thereby maintaining the consistency of the optical path position, which is beneficial to improving the detection accuracy and repeatability. Based on this optimization scheme, a single ultraviolet LED is used as the basic light source, combined with the narrow-band fluorescent modules surrounding it, to realize the idea and specific implementation method of the multi-spectrum light source function, including applying it to three-dimensional fluorescence and multi-spectral water quality detection, which can promote the miniaturization, portability and on-site application of three-dimensional fluorescence detection and multi-spectral water quality detection equipment.

[0012] 2. The present invention provides 17 narrow-band fluorescent modules with different emission wavelengths and one empty space. The emission wavelength is selected according to actual needs. The empty space can directly transmit the emission light of the central LED ultraviolet light source. By rotating the compact multi-spectral light source, 18 excitation lights with different wavelengths can be switched. The narrow-band fluorescent module has a long life, and when the central LED ultraviolet light source fails, it only needs to be replaced, reducing the cost of replacing the entire light source module due to a single LED failure in the existing common technology.

[0013] 3. In the present invention, the central LED ultraviolet light source is connected to the fluorescent module through a metal tube waveguide. The use of the metal tube waveguide can improve the utilization efficiency of the central LED ultraviolet light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A stereogram of a compact multi-spectral light source of the present invention; Figure 2 A diagram of a compact multi-spectral light source of the present invention for miniaturization and portability of three-dimensional fluorescence or multi-spectral water quality detection; Figure 3 A top view of the compact multi-spectral light source of the present invention; Figure 4 An exploded view of the compact multi-spectral light source of the present invention; Figure 5 It is a left view of the compact multi-spectral light source of the present invention; Figure 6 It is an excitation wavelength test chart of the compact multi-spectral light source of the present invention; Figure 7 This is the humic acid sample test of the present invention.

[0015] In the figure: 1. Compact multi-spectral light source; 2. LED ultraviolet light source; 3. Servo motor; 4. Narrow-band fluorescence module; 5. Metal tube waveguide; 6. Cuvette; 7. Spectrometer; 8. Strong light detection device. DETAILED DESCRIPTION

[0016] 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.

[0017] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a compact multi-spectral light source and its application.

[0018] See also Figure 1-7A compact multi-spectrum light source and its application, comprising a compact multi-spectrum light source 1, an LED ultraviolet light source 2 is arranged at the center of the inner wall of the compact multi-spectrum light source 1, a servo motor 3 is arranged at the bottom of the compact multi-spectrum light source 1, a narrow-band fluorescent module 4 is arranged on the compact multi-spectrum light source 1, and a metal tube waveguide 5 is arranged on the compact multi-spectrum light source 1.

[0019] Furthermore, for the above-mentioned compact multi-spectral light source 1, a cuvette 6 is provided on the outer surface of the compact multi-spectral light source 1, and a spectrometer 7 and a strong light detection device 8 are respectively provided on one side of the cuvette 6.

[0020] Furthermore, for the above-mentioned LED ultraviolet light source 2 , the wavelength of the LED ultraviolet light source 2 is 254 nanometers, the compact multi-spectrum light source 1 is cylindrical, and the LED ultraviolet light source is located at the rotation center of the compact multi-spectrum light source 1 .

[0021] By setting an LED ultraviolet light source 2 with a wavelength of 254 nanometers, but not limited to 254 nanometers, at the center of the compact multi-spectrum light source 1, a cylindrical compact multi-spectrum light source 1 is set around the LED ultraviolet light source 2 at the center. The compact multi-spectrum light source 1 is driven to rotate by a servo motor 3, which can achieve precise twenty-degree forward or reverse step rotation.

[0022] The present invention overcomes the inherent problems of other existing solutions based on the integration of multiple wavelength LEDs by proposing a light source solution of a single-wavelength ultraviolet LED light source integrated with a narrow-band fluorescent light-emitting module. The main problems are that the circuit design only needs to be optimized for a single LED, reducing the complexity caused by the different operating voltages required for integrating multiple LEDs with different wavelengths. The emission wavelength is changed by rotating the narrow-band fluorescent module 4, thereby maintaining the consistency of the optical path position, which is beneficial to improving the detection accuracy and repeatability. Based on the optimization scheme, a single ultraviolet LED is used as the basic light source, combined with the narrow-band fluorescent modules 4 surrounding it, to realize the idea and specific implementation method of the multi-spectrum light source function, including applying it to three-dimensional fluorescence and multi-spectral water quality detection, which can promote the miniaturization, portability and on-site application of three-dimensional fluorescence detection and multi-spectral water quality detection equipment.

[0023] Furthermore, for the narrow-band fluorescent module 4 , the narrow-band fluorescent module 4 is at the same height as the LED ultraviolet light source 2 , and the number of the narrow-band fluorescent modules 4 is 17, which surround the circumference of the compact multi-spectrum light source 1 .

[0024] On the circumference of the compact multi-spectral light source 1 , at the same height as the central LED ultraviolet light source 2 , 17 narrow-band fluorescent modules 4 with different emission wavelengths and an empty space are arranged. The narrow-band modules can emit light of a specific wavelength through the excitation of the central LED ultraviolet light source 2 .

[0025] Furthermore, for the above narrow-band fluorescent module 4, the narrow-band fluorescent module 4 is prepared from narrow-band fluorescent powders with different emission wavelengths, and the excitation wavelength thereof is 254 nm.

[0026] By setting 17 narrow-band fluorescent modules 4 with different emission wavelengths and an empty space, the emission wavelength is selected according to actual needs, and the empty space can directly transmit the emission light of the central LED ultraviolet light source 2. By rotating the compact multi-spectral light source 1, 18 excitation lights with different wavelengths can be switched. The narrow-band fluorescent module 4 has a long life, and when the central LED ultraviolet light source 2 fails, it only needs to be replaced, reducing the cost of replacing the entire light source module due to a single LED failure in the existing common technology.

[0027] Furthermore, for the above-mentioned LED ultraviolet light source 2 , the LED ultraviolet light source 2 and the narrow-band fluorescent module 4 are connected via a metal tube waveguide 5 .

[0028] The central LED ultraviolet light source 2 is connected to the fluorescent module via a metal tube waveguide 5 . The use of the metal tube waveguide 5 can improve the utilization efficiency of the central LED ultraviolet light source 2 .

[0029] Working principle: When in use, an LED ultraviolet light source 2 with a wavelength of 254 nanometers is arranged at the center of the compact multi-spectrum light source device, and a cylindrical compact multi-spectrum light source 1 is arranged around the central LED ultraviolet light source 2. The compact multi-spectrum light source 1 is driven by a servo motor 3. On the circumference of the compact multi-spectrum light source, the device is equipped with a control system for controlling the rotation of the servo motor 3 to complete the switching of the central LED ultraviolet light source 2 to the narrow-band fluorescent module 4, thereby completing the switching of excitation light of different wavelengths, and the narrow-band fluorescent module 4 is at the same height as the central LED ultraviolet light source 2. By setting 17 narrow-band fluorescent modules 4 with different emission wavelengths and an empty space, the narrow-band fluorescent module 4 can emit light of a specific wavelength through the excitation of the central LED ultraviolet light source 2, and its excitation wavelength is 254 nm, and the emission wavelength is selected according to actual needs. The empty space can directly transmit the emission light of the central LED ultraviolet light source 2. Therefore, the compact multi-spectrum light source 1 is driven to rotate by the servo motor 3, and 18 excitation lights of different wavelengths can be switched. The use of the metal tube waveguide 5 can improve the utilization efficiency of the central LED light source.

[0030] Example 1: Construction of a small and portable fluorescence spectrometer, the method is as follows Figure 2The hardware layout is shown in the upper figure. The excitation light path is arranged vertically with the fluorescence collection light path emitted by the sample. The central LED emission wavelength used in the embodiment is 308 nm, the narrow-band phosphor excitation wavelength used is 308 nm, and the emission wavelengths are 319, 328, 338, 347, 358, 365, 375, 385, 390, 400, 410, 420, 427, 438, 445, 455, 466 nm. The test sample is humic acid. The wavelength of the light source and the results of the humic acid test are shown in Figure 1. Figure 6 and Figure 7 shown.

[0031] Example 2: Construction of a small and portable multi-spectral water quality analyzer, the method is as follows Figure 2 The hardware layout is shown in the figure below. The excitation light path and the spectrum signal collection light path after sample absorption are arranged in the same straight line. The central LED emission wavelength used is 254 nm, and the narrow-band phosphor excitation wavelength used is 254 nm. The emission wavelength can be selected according to actual needs, such as 275, 350, 420, 460, 500, 540, 580, 620 nm, etc. While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A compact multi-spectral light source and its application, comprising a compact multi-spectral light source (1), characterized in that: An LED ultraviolet light source (2) is arranged at the center of the inner wall of the compact multi-spectrum light source (1), a servo motor (3) is arranged at the bottom of the compact multi-spectrum light source (1), a narrow-band fluorescent module (4) is arranged on the compact multi-spectrum light source (1), and a metal tube waveguide (5) is arranged on the compact multi-spectrum light source (1).

2. A compact multi-spectral light source and its application according to claim 1, characterized in that: The outer surface of the compact multi-spectral light source (1) is provided with a cuvette (6), and a spectrometer (7) and a strong light detection device (8) are respectively provided on one side of the cuvette (6).

3. A compact multi-spectral light source and its application according to claim 1, characterized in that: The wavelength of the LED ultraviolet light source (2) is 254 nanometers, the compact multi-spectrum light source (1) is cylindrical, and the LED ultraviolet light source is located at the rotation center of the compact multi-spectrum light source (1).

4. A compact multi-spectral light source and its application according to claim 1, characterized in that: The narrow-band fluorescent module (4) is at the same height as the LED ultraviolet light source (2), and the number of the narrow-band fluorescent modules (4) is 17, and the 17 narrow-band fluorescent modules (4) surround the circumference of the compact multi-spectrum light source (1).

5. A compact multi-spectral light source and its application according to claim 1, characterized in that: The narrow-band fluorescent module (4) is prepared from narrow-band fluorescent powders with different emission wavelengths, and its excitation wavelength is 254 nm.

6. A compact multi-spectral light source and its application according to claim 1, characterized in that: The LED ultraviolet light source (2) and the narrow-band fluorescent module (4) are connected via a metal tube waveguide (5).

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