Multi-beam compensation adjustment suspended matter concentration measurement method

Abstract

The invention belongs to the technical field of suspended matter concentration measurement, and particularly relates to a suspended matter concentration measurement method based on multi-beam compensation adjustment, which comprises the following steps: step 1, preparing a plurality of light sources which adopt tunable lasers and are respectively marked as lambda1, lambda2,..., lambdan, arranging and installing an adjusting mechanism on the shore of a water body, and adjusting the water body according to the adjusting mechanism; and the plurality of light sources are controlled to irradiate the water body through the light path system. According to the suspended matter concentration measurement method based on multi-beam compensation adjustment, the multi-beam compensation adjustment method effectively solves the problem of measurement errors caused by ambient light interference, sensor surface contamination and other interference factors in water in a traditional measurement method. By introducing multiple beams of light sources and combining a compensation algorithm, the problem of errors existing in a traditional single-beam measurement method is effectively solved. According to the device, a multi-beam light path design is adopted, the water body is irradiated through light beams with different angles and wavelengths, and the concentration of suspended solids in the water body is accurately calculated by integrating the transmissivity and scattering information of each light beam.

Description

Technical Field

[0001] The invention relates to the technical field of suspended matter concentration measurement, and in particular to a suspended matter concentration measurement method with multi-beam compensation adjustment. Background Art

[0002] Suspended matter concentration is one of the important indicators for evaluating water quality. Traditional measurement methods mainly rely on single-beam transmission measurement, and its accuracy and sensitivity will be greatly reduced in high turbidity environments or when interfering substances are present. In addition, factors such as the heterogeneity of suspended matter in water bodies, changes in measurement ambient light, and sensor surface contamination will also affect the measurement results. Therefore, how to improve the accuracy and stability of suspended matter concentration measurement has become an urgent problem to be solved.

[0003] Therefore, a method for measuring the concentration of suspended matter with multi-beam compensation adjustment is needed. Summary of the invention

[0004] Based on the existing technical problems, the present invention proposes a suspended matter concentration measurement method with multi-beam compensation adjustment.

[0005] The invention proposes a method for measuring the concentration of suspended matter with multi-beam compensation adjustment, comprising the following steps: step 1, equipping a plurality of light sources, wherein the plurality of light sources adopt tunable lasers and are respectively marked as λ1, λ2, ..., λ n An adjustment mechanism is installed on the bank of the water body to control multiple light sources to irradiate into the water body through the optical path system and form a multi-beam intersection area in the measuring area; and the light beams emitted by the multiple light sources have different wavelengths and incident angles, and the receiver is installed inside a receiving box at the bottom of the intersection area, and the transmitted light passing through the water body and the light scattered by the suspended matter are received by the receiver inside the receiving box.

[0006] Step 2: Multi-beam compensation calculation: Assume that the light intensity of a beam before entering the water is I0(λ n ), the transmitted light intensity is I t (λ n ), then the transmittance T(λ n ) is expressed as:

[0007] where λ n is the wavelength of the nth light beam.

[0008] Step 3: Considering the scattering effect of suspended matter, the scattered light intensity I s (λ n ) and the suspended matter concentration C and scattering coefficient K s (λ n ), the calculation formula is expressed as:

[0009] I s (λn )=K s (λ n )×C, the multi-beam system constructs a rectangular equation by receiving the transmitted light and scattered light of each beam:

[0010] where a n and b n is the correction coefficient related to the ambient light and sensor status. By solving this set of equations and combining the multi-beam data, the suspended matter concentration C can be accurately calculated.

[0011] Step 4: Concentration output and calibration; the obtained suspended matter concentration value is displayed by a digital display device and can be transmitted to the remote monitoring system through a communication module; in order to ensure the accuracy and stability of the measurement, the device is equipped with an automatic calibration system, which adjusts the light source intensity, optical path parameters and compensation coefficient through regular self-inspection and calibration to adapt to environmental changes.

[0012] Preferably, the installation and adjustment mechanism includes a support rod installed on the top of the bank of the water body, a cross bar is fixedly installed on the top of the support rod, the cross bar is vertically cross-distributed with the support rod, and a circular rotating motor is also fixedly installed on the top surface of one end of the cross bar located at the top of the water body.

[0013] Preferably, the output bottom end of the circular rotary motor penetrates and extends to the bottom of the cross bar, and a rotating shaft is fixedly mounted on the output bottom end of the circular rotary motor via a coupling, and a turntable is fixedly mounted on the bottom of the rotating shaft.

[0014] Preferably, sliding rods are evenly and equally installed on the outer arc surface of the turntable, and a slide plate is slidably inserted into the surface of each sliding rod. The slide plate is locked in place by a top screw after linear sliding adjustment on the surface of the sliding rod, and the surface of the slide plate is L-shaped.

[0015] Preferably, a limiting ring is fixedly mounted on the other end of each of the plurality of slide rods, and the limiting ring is concentrically arranged with the rotating disk.

[0016] Preferably, a swing motor is fixedly mounted on the top of one end of the slide, the output end of the swing motor passes through and extends to the bottom of the slide, and a swing shaft is fixedly mounted on the output end of the swing motor via a coupling.

[0017] Preferably, a U-shaped seat is fixedly mounted on the bottom end of the swing shaft, and both inner walls of the U-shaped seat are rotatably connected to hinge shafts through bearings, and the opposite surfaces of the two hinge shafts are fixedly mounted to the mounting surfaces on both sides of the tunable laser.

[0018] Preferably, an angle adjustment motor is fixedly mounted on one side surface of the U-shaped seat, and the output end of the angle adjustment motor is fixedly mounted on one end relative to the hinge shaft through a coupling. The angle adjustment motor realizes the rotation of the hinge shaft to drive the angle adjustment of the irradiation light of the tunable laser.

[0019] Preferably, the receiving box is installed in the water body directly below the turntable, and the light emitted by multiple tunable lasers arranged around the turntable all form a beam intersection area on the top of the receiving box, and the irradiation points of the multiple beams are received by the receiver installed inside the receiving box.

[0020] Preferably, the receiving box is made of transparent glass and a sealed space is formed by sealant, and the plurality of receivers are sealed by the receiving box.

[0021] The beneficial effects of the present invention are:

[0022] The multi-beam compensation adjustment method of the present invention effectively solves the measurement error problems caused by ambient light interference, sensor surface contamination and other interference factors in the water body in the traditional measurement method. By introducing multiple light sources and combining compensation algorithms, the error problem existing in the traditional single-beam measurement method is effectively solved. The device adopts a multi-beam optical path design, irradiates the water body with light beams of different angles and wavelengths, and integrates the transmittance and scattering information of each light beam to accurately calculate the concentration of suspended matter in the water body. In addition, the device has an automatic calibration function and can adapt to different water quality and environmental conditions, providing reliable technical support for environmental monitoring, water treatment engineering and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a suspended matter concentration measurement method with multi-beam compensation adjustment;

[0024] Figure 2 A three-dimensional diagram of the installation and adjustment mechanism of a method for measuring the concentration of suspended matter with multi-beam compensation adjustment;

[0025] Figure 3 A three-dimensional diagram of a sliding rod structure of a suspended matter concentration measurement method with multi-beam compensation adjustment;

[0026] Figure 4 A three-dimensional diagram of the slide structure of a suspended matter concentration measurement method with multi-beam compensation adjustment.

[0027] In the figure: 1. tunable laser; 2. installation and adjustment mechanism; 21. support rod; 22. cross bar; 23. circular rotation motor; 24. rotating shaft; 25. turntable; 26. slide bar; 27. slide plate; 28. limit ring; 29. ​​swing motor; 210. swing shaft; 211. U-shaped seat; 212. hinge shaft; 213. angle adjustment motor; 3. receiver; 4. receiving box. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-Figure 4 A method for measuring suspended matter concentration with multi-beam compensation adjustment includes the following steps: Step 1: equipping multiple light sources, wherein the multiple light sources use tunable lasers 1, which are marked as λ1, λ2, ..., λ n An adjusting mechanism 2 is installed on the bank of the water body to control multiple light sources to irradiate into the water body through the optical path system and form a multi-beam intersection area in the measuring area; and the light beams emitted by the multiple light sources have different wavelengths and incident angles, and the receiver 3 is installed inside the receiving box 4 at the bottom of the intersection area, and the transmitted light passing through the water body and the light scattered by the suspended matter are received by the receiver 3 inside the receiving box 4.

[0030] The installation and adjustment mechanism 2 includes a support rod 21 installed on the top of the bank of the water body, a cross bar 22 is fixedly installed on the top of the support rod 21, and the cross bar 22 is vertically crossed with the support rod 21. A circular rotating motor 23 is also fixedly installed on the top surface of one end of the cross bar 22 located at the top of the water body.

[0031] Specifically, the support rod 21 is fixed on the top of the shore, providing a stable support point for the entire measurement system, reducing the shaking caused by wind or other external forces, and ensuring the accuracy of the measurement; the crossbar 22 is vertically cross-distributed with the support rod 21, making the installation and adjustment of the light source more flexible. By adjusting the equipment on the crossbar 22, the incident angle and position of the light beam can be easily changed; the installation of the circular rotating motor 23 allows the light source to rotate 360 ​​degrees around the crossbar 22, thereby realizing the measurement of the water body from multiple angles, increasing the comprehensiveness of the data.

[0032] The output bottom end of the circular rotary motor 23 penetrates and extends to the bottom of the crossbar 22 , and a rotating shaft 24 is fixedly mounted on the output bottom end of the circular rotary motor 23 via a coupling, and a turntable 25 is fixedly mounted on the bottom of the rotating shaft 24 .

[0033] Specifically implemented in this way, the extension of the bottom end of the motor output and the use of the coupling ensure that the motor's rotational power is effectively transmitted to the rotating shaft 24, thereby driving the turntable 25 to rotate; the installation of the turntable 25 allows the light source to be evenly distributed on the turntable 25. When the turntable 25 rotates, the light source can evenly cover the measurement area, thereby improving the consistency and comprehensiveness of the measurement; multiple light sources can be installed on the turntable 25, and the position of the light source can be adjusted as needed, thereby facilitating the realization of a multi-beam intersection area design.

[0034] The outer arc surface of the turntable 25 is evenly and equally installed with sliding rods 26, and a slide plate 27 is slidably inserted into the surface of each sliding rod 26. The slide plate 27 is locked in place by a top screw after linear sliding adjustment on the surface of the sliding rod 26, and the surface of the slide plate 27 is L-shaped; the other ends of the multiple sliding rods 26 are fixedly installed with a limit ring 28, and the limit ring 28 is concentrically arranged with the turntable 25.

[0035] Specifically implemented as follows: the slide plate 27 can slide linearly on the slide bar 26 and lock in position, so that the position of the light source can be precisely adjusted, thereby precisely controlling the incident angle and position of the light beam; the slide bar 26 is evenly and equally installed on the turntable 25, ensuring the uniform distribution of the light source on the turntable 25, which is conducive to achieving uniform light beam coverage and measurement; the design of the L-shaped slide plate 27 provides more adjustment options, and the height and angle of the light source can be adjusted according to different measurement requirements, increasing the flexibility of the system; the setting of the limit ring 28 can prevent the slide plate 27 from accidentally falling off the slide bar 26, providing additional safety protection and ensuring the stability of the measurement.

[0036] A swing motor 29 is fixedly mounted on the top of one end of the slide plate 27 , and the output end of the swing motor 29 passes through and extends to the bottom of the slide plate 27 , and a swing shaft 210 is fixedly mounted on the output end of the swing motor 29 via a coupling.

[0037] Specifically implemented in this way, the installation of the swing motor 29 allows the light source to not only slide linearly along the slide rod 26, but also swing around the swing shaft 210, thereby increasing the dimension of light source adjustment and being able to more accurately control the direction of the light beam; through the combination of the swing motor 29 and the swing shaft 210, fine adjustment of the incident angle of the light beam can be achieved, which is crucial for accurate measurement of suspended matter concentration; the use of the swing motor 29 can realize automatic adjustment of the light beam angle, reduce the complexity of manual operation, and improve measurement efficiency.

[0038] A U-shaped seat 211 is fixedly mounted at the bottom end of the swing shaft 210 , and both inner walls of the U-shaped seat 211 are rotatably connected to hinge shafts 212 through bearings. The opposite surfaces of the two hinge shafts 212 are fixedly mounted to the mounting surfaces on both sides of the tunable laser 1 .

[0039] Specifically, through the design of the articulated shaft 212 and the U-shaped seat 211, the position of the laser can be fine-tuned, thereby improving the accuracy of the beam direction adjustment; the design of the articulated shaft 212 allows the laser to be adjusted in two axial directions, thereby increasing the flexibility of adjustment and adapting to different measurement requirements.

[0040] An angle adjustment motor 213 is also fixedly mounted on one side surface of the U-shaped seat 211. The output end of the angle adjustment motor 213 is fixedly mounted relative to one end of the hinge shaft 212 through a coupling. The angle adjustment motor 213 realizes the rotation of the hinge shaft 212 to drive the tunable laser 1 to adjust the angle of the irradiated light.

[0041] Specifically implemented in this way, the motor can accurately control the rotation angle, thereby achieving precise adjustment of the laser irradiation light angle, which helps to improve the accuracy of the measurement; according to different measurement requirements, a variety of angle adjustment modes can be achieved through programming and control of the motor; automatic angle adjustment can quickly complete the adjustment of the optical path, thereby improving the efficiency of the entire suspended matter concentration measurement process.

[0042] The receiving box 4 is installed in the water body directly below the turntable 25. The light emitted by multiple tunable lasers 1 arranged around the turntable 25 forms a beam intersection area at the top of the receiving box 4, and the irradiation points of the multiple beams are received by the receiver 3 installed inside the receiving box 4.

[0043] Specifically implemented as follows: the position design of the receiving box 4 allows the light beams of all lasers to intersect at the same point, which is convenient for centralized reception of scattered and transmitted light signals and improves the efficiency of signal collection; since the receiver 3 can simultaneously receive light signals of multiple angles and wavelengths, the concentration and distribution of suspended matter can be calculated more accurately; laser beams at different angles can provide multi-angle information on the distribution of suspended matter, which helps to have a more comprehensive understanding of the water condition; light beams of different wavelengths can provide more information on the characteristics of suspended matter, such as size, shape and composition; and by forming a light beam intersection area on the top of the receiving box 4, the optical path design can be optimized, light loss can be reduced, and light energy utilization can be improved.

[0044] The receiving box 4 is made of transparent glass and is sealed by sealant to form a closed space. The multiple receivers 3 are sealed by the receiving box 4 .

[0045] Specifically implemented in this way, the sealed receiving box 4 can effectively prevent water from entering, protect the internal electronic components, and extend the service life of the receiver 3; the transparent glass material has good corrosion resistance and is suitable for long-term use in aquatic environments; the transparent glass will not significantly absorb or scatter the light beam, thereby ensuring the transmission efficiency of the optical signal.

[0046] Step 2: Multi-beam compensation calculation: Assume that the light intensity of a beam before entering the water is I0(λn ), the transmitted light intensity is I t (λ n ), then the transmittance T(λ n ) is expressed as:

[0047] where λ n is the wavelength of the nth light beam.

[0048] Step 3: Considering the scattering effect of suspended matter, the scattered light intensity I s (λ n ) and the suspended matter concentration C and scattering coefficient K s (λ n ), the calculation formula is expressed as:

[0049] I s (λ n )=K s (λ n )×C, the multi-beam system constructs a rectangular equation by receiving the transmitted light and scattered light of each beam:

[0050] where a n and b n is the correction coefficient related to the ambient light and sensor status. By solving this set of equations and combining the multi-beam data, the suspended matter concentration C can be accurately calculated.

[0051] Step 4: Concentration output and calibration; the obtained suspended matter concentration value is displayed by a digital display device and can be transmitted to the remote monitoring system through a communication module; in order to ensure the accuracy and stability of the measurement, the device is equipped with an automatic calibration system, which adjusts the light source intensity, optical path parameters and compensation coefficient through regular self-inspection and calibration to adapt to environmental changes.

[0052] The multi-beam compensation adjustment method of the present invention effectively solves the measurement error problems caused by ambient light interference, sensor surface contamination and other interference factors in the water body in the traditional measurement method. By introducing multiple light sources and combining compensation algorithms, the error problem existing in the traditional single-beam measurement method is effectively solved. The device adopts a multi-beam optical path design, irradiates the water body with light beams of different angles and wavelengths, and integrates the transmittance and scattering information of each light beam to accurately calculate the concentration of suspended matter in the water body. In addition, the device has an automatic calibration function and can adapt to different water quality and environmental conditions, providing reliable technical support for environmental monitoring, water treatment engineering and other fields.

[0053] Working principle: During the installation and adjustment of multiple light sources, multiple tunable lasers 1 are controlled to be installed between two hinge shafts 212. The tunable laser 1 is swung around the axis of the hinge shaft 212 to adjust the emission angle through the operation of the angle adjustment motor 213. The swing motor 29 is used to rotate the swing shaft 210 in a circle to adjust the angle. The slide plate 27 slides linearly on the surface of the slide bar 26 to adjust the emission position of each beam of light. Finally, it can also cooperate with the circular rotation motor 23 at the top to control the overall light beam to rotate in a horizontal direction to adjust the optimal emission angle.

[0054] The above description is only a preferred specific implementation manner 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 scheme and inventive concept 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 method for measuring suspended matter concentration with multi-beam compensation adjustment, characterized in that: The following steps are included: Step 1: equip multiple light sources, wherein the multiple light sources use tunable lasers (1) and are marked as λ1, λ2, ..., λ n , an adjustment mechanism (2) is installed on the bank of the water body to control multiple light sources to irradiate the water body through the optical path system and form a multi-light beam intersection area in the measurement area; the light beams emitted by the multiple light sources have different wavelengths and incident angles, and the receiver (3) is installed inside a receiving box (4) at the bottom of the intersection area, and the receiver (3) inside the receiving box (4) receives the transmitted light passing through the water body and the light scattered by the suspended matter; Step 2: Multi-beam compensation calculation: Assume that the light intensity of a beam before entering the water is I0(λ n ), the transmitted light intensity is I t (λ n ), then the transmittance T(λ n ) is expressed as: where λ n is the wavelength of the nth beam; Step 3: Considering the scattering effect of suspended matter, the scattered light intensity I s (λ n ) and the suspended matter concentration C and scattering coefficient K s (λ n ), the calculation formula is expressed as: I s (λ n )=K s (λ n )×C, the multi-beam system constructs a rectangular equation by receiving the transmitted light and scattered light of each beam: where a n and b n is the correction coefficient related to the ambient light and sensor status. By solving this set of equations and combining the multi-beam data, the suspended matter concentration C can be accurately calculated. Step 4: Concentration output and calibration; the obtained suspended matter concentration value is displayed by a digital display device and can be transmitted to the remote monitoring system through a communication module; in order to ensure the accuracy and stability of the measurement, the device is equipped with an automatic calibration system, which adjusts the light source intensity, optical path parameters and compensation coefficient through regular self-inspection and calibration to adapt to environmental changes.

2. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 1, characterized in that: The installation and adjustment mechanism (2) comprises a support rod (21) installed on the top of the bank of a water body, a cross rod (22) is fixedly installed on the top of the support rod (21), the cross rod (22) and the support rod (21) are vertically cross-distributed, and a circular rotating motor (23) is also fixedly installed on the top surface of one end of the cross rod (22) located on the top of the water body.

3. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 2 is characterized in that: The output bottom end of the circular rotating motor (23) penetrates and extends to the bottom of the cross bar (22), and the output bottom end of the circular rotating motor (23) is also fixedly mounted with a rotating shaft (24) via a coupling, and a rotating disk (25) is fixedly mounted at the bottom of the rotating shaft (24).

4. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 3 is characterized in that: The outer arc surface of the turntable (25) is evenly and equally divided with sliding rods (26), and a sliding plate (27) is slidably inserted into the surface of each sliding rod (26). The sliding plate (27) is locked and positioned by a top screw after linear sliding adjustment on the surface of the sliding rod (26), and the surface of the sliding plate (27) is L-shaped.

5. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 4 is characterized in that: A limiting ring (28) is fixedly mounted on the other ends of the plurality of sliding rods (26), and the limiting ring (28) is concentrically arranged with the rotating disk (25).

6. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 4, characterized in that: A swing motor (29) is fixedly mounted on the top of one end of the slide plate (27); an output end of the swing motor (29) passes through and extends to the bottom of the slide plate (27); and a swing shaft (210) is fixedly mounted on the output end of the swing motor (29) via a coupling.

7. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 6, characterized in that: A U-shaped seat (211) is fixedly mounted on the bottom end of the swing shaft (210), and both inner walls of the U-shaped seat (211) are rotatably connected to hinge shafts (212) via bearings, and the opposing surfaces of the two hinge shafts (212) are fixedly mounted to both mounting surfaces of the tunable laser (1).

8. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 7, characterized in that: An angle adjustment motor (213) is also fixedly mounted on one side surface of the U-shaped seat (211); an output end of the angle adjustment motor (213) is fixedly mounted on one end relative to the hinge shaft (212) via a coupling; the angle adjustment motor (213) realizes the rotation of the hinge shaft (212) to drive the irradiation light angle adjustment of the tunable laser (1).

9. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 3, characterized in that: The receiving box (4) is installed in the water body directly below the turntable (25), and the light emitted by the multiple tunable lasers (1) arranged around the turntable (25) all form a beam intersection area at the top of the receiving box (4), and the irradiation points of the multiple beams are all received by the receiver (3) installed inside the receiving box (4).

10. The method for measuring suspended matter concentration by multi-beam compensation adjustment according to claim 1, characterized in that: The receiving box (4) is made of transparent glass and is sealed by a sealant to form a closed space. The plurality of receivers (3) are sealed by the receiving box (4).

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