Multi-dimensional online photoelectric sediment monitor

Abstract

The invention belongs to the technical field of detection, and particularly relates to a multi-dimensional online photoelectric sediment monitor which comprises a monitoring terminal and a supporting assembly, the monitoring terminal comprises a sensor assembly and an information processing assembly, and the sensor assembly comprises a light emitting unit, a light filtering unit and a detection unit. The light emitting unit is used for providing transmission and scattered light required by signal detection, the light filtering unit is used for filtering visible light and non-signal reflected light on the surface of a water body, and the sensor assembly is used for detecting a scattered signal or a transmission signal of to-be-detected sediment or suspended solids in water; the information processing assembly is connected to the sensor assembly and used for converting the obtained photoelectric signals into information containing sediment information; the monitoring terminal is arranged on the supporting assembly, and the supporting assembly is used for supporting and enabling the height of the monitoring terminal to be at a preset position. The sediment information in the water body to be detected can be efficiently monitored, the cost is reduced, and the environmental adaptability, the stability and the flexibility of the device are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection, and particularly relates to a multi-dimensional online optoelectronic sediment monitor. Background Art

[0002] The sediment concentration in runoff during soil erosion is one of the important parameters for measuring soil and water loss. Whether evaluating the erosion degree of a watershed or a river channel, it is necessary to measure and quantify the sediment content. Only in this way can the dynamic process of soil erosion be accurately simulated and a reasonable scientific basis be provided for the decision-making of soil and water loss control. To achieve efficient monitoring of sediment information in water, in the prior art, a monitoring terminal is used to monitor the water body, and a support component is used to support and adjust the height of the monitoring terminal.

[0003] However, due to the change of water level, to ensure that the monitoring terminal accurately monitors the water body, it is necessary to use the support component to adjust the monitoring terminal to a certain height and also adjust the angle of the monitoring terminal. When the monitoring terminal is tilted towards the water body, it may sag due to the influence of gravity, resulting in a change in angle during the monitoring process, which is likely to affect the monitoring results. Therefore, it is necessary to design a multi-dimensional online optoelectronic sediment monitor to solve the above problems. Summary of the Invention

[0004] In view of the above problems, the present invention provides a multi-dimensional online optoelectronic sediment monitor to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A multi-dimensional online optoelectronic sediment monitor includes a monitoring terminal and a support component. The monitoring terminal includes a sensor component and an information processing component. The sensor component includes a light-emitting unit, a light-filtering unit, and a detection unit. The light-emitting unit is used to provide the transmitted and scattered light required for signal detection. The light-filtering unit is used to filter out visible light on the water surface and non-signal reflected light. The sensor component is used to detect the scattered signal or transmitted signal of the sediment or suspended matter to be measured in the water. The information processing component is connected to the sensor component and is used to convert the obtained optoelectronic signal into information containing sediment information. The monitoring terminal is arranged on the support component, and the support component is used to support and keep the height of the monitoring terminal at a preset position. The present invention can achieve efficient monitoring of sediment information in the water to be measured, reduce costs, and improve the environmental adaptability, stability, and flexibility of the device.

[0006] A multi-dimensional on-line photoelectric sediment monitor, comprising a monitoring terminal, a support assembly, an angle adjustment assembly and an assembly component; the angle adjustment assembly includes a first support frame, a first motor, a first gear, a second gear and a positioning mechanism, the first support frame is connected to the support assembly, the first motor is connected to the first support frame and is in transmission connection with the first gear, the axial directions of the first gear and the second gear both face the left and right directions, the first gear meshes with the second gear, the second gear is connected to the assembly component, the positioning mechanism is connected to the first gear and is used to lock the assembly component, the monitoring terminal is used to be installed on the assembly component, and the monitoring terminal includes a scattering detector, a receiving detector and a light-emitting diode (LED) or a laser (LD), and is used to perform one-dimensional detection, two-dimensional detection or multi-dimensional detection, and the receiving detector includes a photodiode (PD) or an avalanche diode (APD).

[0007] Further, the scattering detector has more than 2 spatial degrees of freedom, its light source and multiple detection devices are in the XY plane, and the multiple detection devices respectively detect photoelectric signals in the directions of 90°, 120° and 140°. The monitoring terminal is used to perform two-dimensional optical detection, and its two-dimensional optical device layout includes but is not limited to T and U-shaped structures. The optical detection surface of the two-dimensional optical device includes two or more photosensitive surfaces, and the photosensitive surfaces are distributed in an L shape, a U shape or a T shape. The hardware circuit design of the monitoring terminal includes a signal driving, a photoelectric detection circuit and a signal processing circuit, a step-up and step-down function circuit, a high-precision 24-bit ADC signal acquisition and processing circuit, a temperature and humidity detection sensor chip and a clock function, and is used to display the data reading time.

[0008] Further, the on-line signal processing and / or communication module of the monitoring terminal is a CAN network control terminal based on STM32 + Quectel EC20, and uses RS485, 4G antenna and GPS antenna as communication methods to remotely transmit and manage data. It uses a CAN interface and supports users to customize and configure CAN data decoding scripts. The software algorithm of the monitoring terminal includes an optimal current search algorithm, an optimal signal detection algorithm or a sediment concentration conversion algorithm.

[0009] Further, the assembly component includes a second support frame, a first mounting seat, a connecting shaft, a second motor, a first transmission shaft, a lead screw, a nut, a first clamping member and a second clamping structure. The right end of the second support frame is connected to the second gear, the left end of the second support frame is connected to the first mounting seat through the connecting shaft, and an arc-shaped track is provided on the left side of the first support frame. The connecting shaft is slidably connected to the arc-shaped track; The second motor is installed on the first mounting seat. The axial direction of the first transmission shaft faces the left and right directions. The left and right ends of the first transmission shaft are respectively rotatably connected to the first mounting seat and the second support frame. A lead screw is provided in the middle of the first transmission shaft, and a nut is connected to the lead screw. The first clamping member is connected to the nut and is located on the left side of the second clamping structure. The first clamping member and the second clamping structure are used to clamp the monitoring terminal.

[0010] Further, the assembly component further includes a first sliding track, which is connected to the second support frame and extends in the left and right directions. The nut is slidably connected to the first sliding track.

[0011] Further, the second clamping structure includes a second clamping member and a second sliding track. The second sliding track extends in the front and rear directions and is connected to the second support frame. The second clamping member is slidably connected to the second sliding track in the front and rear directions. The assembly component further includes a third gear and a rack. The rack is connected to the second clamping member, and the third gear is connected to the first transmission shaft. The third gear meshes with the rack.

[0012] Further, the assembly component further includes a first cam, a top plate, a clamping strip, and a first limiting block. The first cam is connected to the first transmission shaft and is coaxially distributed with the first transmission shaft. A through hole is provided at the upper end of the first clamping member. The second clamping member is provided with a clamping groove with front and left openings. A plurality of the first limiting blocks are provided at the upper end of the inner wall of the clamping groove. One end of the clamping strip is slidably connected to the through hole in the up and down direction, and the other end is used to be inserted between two adjacent first limiting blocks in the clamping groove. The upper end of the top plate is connected to the clamping strip, and the first cam is used to abut against the lower end of the top plate.

[0013] Further, the assembly component further includes a second limiting block. The second limiting block is L-shaped. One end of the second limiting block is connected to the first clamping member, and the other end is located on the left side of the top plate.

[0014] Further, the positioning mechanism includes a second transmission shaft, a second cam, and a first abutting block. A first abutting block is connected to the right end of the first cam. The second transmission shaft is coaxially distributed and connected with the first gear. The second cam is coaxially distributed and connected with the second transmission shaft. The lower end surface of the second cam is used to abut against the upper end surface of the first abutting block.

[0015] Further, the positioning mechanism further includes a third transmission shaft, a third cam, a second abutting block, a first transmission wheel, a second transmission wheel and a transmission belt. The second transmission shaft and the third transmission shaft are respectively located at the left and right ends of the second support frame and are parallel in the axial direction. The left and right ends of the second transmission shaft are respectively rotatably connected to the left and right ends of the second support frame. The first transmission wheel is coaxially distributed and connected with the second transmission shaft. The second transmission wheel is coaxially distributed and connected with the third transmission shaft. The first transmission wheel is drivingly connected to the second transmission wheel through the transmission belt; A second abutting block is connected to the left end of the first cam. The third cam is coaxially distributed and connected with the third transmission shaft. The upper end of the third cam is used to abut against the lower end surface of the second abutting block.

[0016] Further, the support assembly includes a third support frame and a cylinder. A plurality of the cylinders are arranged at the upper end of the third support frame. The cylinders are drivingly connected to the first support frame and are used to drive the first support frame to move in the up and down direction.

[0017] The technical effects and advantages of the present invention: 1. The first motor is used to drive the first gear to rotate. The first gear meshes with the second gear to drive the second gear to rotate. The second gear is connected to the assembly component, and the assembly component is connected to the monitoring terminal. During the rotation of the second gear, the monitoring terminal can be synchronously driven to rotate, which is beneficial to automatically adjust the angle of the monitoring terminal.

[0018] 2. The first gear is connected to the positioning mechanism. During the rotation of the first gear, the positioning mechanism is synchronously driven to rotate. The positioning mechanism is used to lock the assembly component. That is, through the synchronous rotation of the positioning mechanism and the assembly component, the positioning mechanism can always lock the assembly component, so as to ensure the stability of the monitoring terminal installed on the assembly component, avoid the angle change caused by the monitoring terminal sagging under the influence of gravity, and is beneficial to ensure the accuracy of the monitoring result.

[0019] Other features and advantages of the present invention will be described in the following description of the specification. And, in part, it will be obvious from the description of the specification, or understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the drawings. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Shows the usage state diagram of the multi-dimensional online optoelectronic sediment monitor according to an embodiment of the present invention; Figure 2 Shows the schematic diagram of multi-dimensional optical near-infrared detection according to an embodiment of the present invention Figure 1 ; Figure 3 Shows the schematic diagram of multi-dimensional optical near-infrared detection according to an embodiment of the present invention Figure 2 ; Figure 4 Shows the schematic diagram of the test curve in the air according to an embodiment of the present invention; Figure 5 Shows the schematic diagram of the structure of the assembly component according to an embodiment of the present invention; Figure 6 Shows the schematic diagram of the structure of another perspective of the assembly component according to an embodiment of the present invention; Figure 7 Shows the schematic diagram of the structure of the angle adjustment component according to an embodiment of the present invention; Figure 8 Shows the schematic diagram of the structure of another perspective of the angle adjustment component according to an embodiment of the present invention; Figure 9 Shows the partial schematic diagram of the structure of the angle adjustment component according to an embodiment of the present invention; Figure 10 Shows the schematic diagram of the structure of the support component according to an embodiment of the present invention.

[0022] In the figure: 1. Monitoring terminal; 2. Support component; 3. Angle adjustment component; 4. Assembly component; 5. First support frame; 6. First motor; 7. First gear; 8. Second gear; 9. Second support frame; 10. First mounting seat; 11. Connecting shaft; 12. Second motor; 13. First transmission shaft; 14. Lead screw; 15. Nut; 16. First clamping member; 17. Arc track; 18. First sliding track; 19. Second clamping member; 20. Second sliding track; 21. Third gear; 22. Rack; 23. First cam; 24. Top plate; 25. Clamping strip; 26. First limit block; 27. Card slot; 28. Second limit block; 29. Second transmission shaft; 30. Second cam; 31. First abutting block; 32. Third transmission shaft; 33. Third cam; 34. Second abutting block; 35. First transmission wheel; 36. Second transmission wheel; 37. Transmission belt; 38. Third support frame; 39. Cylinder. Detailed implementation manners

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] As Figures 1 to 10 shown, a multi-dimensional online optoelectronic sediment monitor according to an embodiment of the present invention includes a monitoring terminal 1, a support assembly 2, an angle adjustment assembly 3, and an assembly component 4; the angle adjustment assembly 3 includes a first support frame 5, a first motor 6, a first gear 7, a second gear 8, and a positioning mechanism. The first support frame 5 is connected to the support assembly 2, the first motor 6 is connected to the first support frame 5 and is in transmission connection with the first gear 7. The axial directions of both the first gear 7 and the second gear 8 are towards the left and right directions. The first gear 7 meshes with the second gear 8, the second gear 8 is connected to the assembly component 4, and the positioning mechanism is connected to the first gear 7 and is used to lock the assembly component 4. The monitoring terminal 1 is used to be installed on the assembly component 4.

[0025] Please refer to Figures 2 - 4 , the principle of the present invention is: based on the multi-dimensional optical near-infrared detection method, using a high-precision processing algorithm, it can on-line measure the turbidity of suspended solids and the sediment concentration. It supports the RS485 Modbus communication protocol, supports local USB data storage, and has the advantages of a wide range of measurement coverage, high measurement accuracy, and long standby time.

[0026] The loss of light energy after light passes through sediment-laden water is calculated by Equation (1) as follows: (1) Where: I is the initial light energy intensity, in candela (cd); is the remaining light energy intensity after light passes through sediment-laden water, in candela (cd); is the absorption coefficient of sediment-laden water to light energy; is the scattering coefficient of sediment-laden water to light energy; L is the transmission distance of light in sediment-laden water; is the dissipation coefficient of light energy after light passes through sediment-laden water.

[0027] The calculation formula for measuring the suspended sediment concentration by the method of light reflection can be expressed by Equation (2).

[0028] (2) According to the Mie scattering law, the scattering coefficient of light in sediment-laden water is calculated by Equation (3) (3) Where: K is the extinction coefficient of sediment-laden flow; is the number of suspended sediment particles in the sediment-laden flow per unit volume; is the median grain size of the suspended sediment particles.

[0029] The scattered light intensity after light passes through the sediment-laden flow is basically independent of the wavelength and only related to the particle size. Therefore, the extinction coefficient K is only related to the number N of suspended sediment particles in the sediment-laden flow per unit volume and the median grain size of the suspended sediment particles. The calculation formula form of the extinction coefficient K can be written as formula (4) (4) Where m, n, k, and m are undetermined coefficients that need to be determined using specific experiments; C represents the suspended sediment concentration, g / L; represents the density of the suspended sediment particles, kg / m3.

[0030] Substituting formula (4) into formula (2) can obtain the initial light energy intensity and the relationship with the light energy I reflected back after the light passes through the sediment-laden flow: (5) The principle formula for measuring the suspended sediment concentration by the light scattering method can be written as formula (6): (6) Specifically, the monitoring terminal 1 includes a sensor assembly, an information processing assembly, and a housing structure. The sensor assembly and the information processing assembly are both installed inside the housing structure, and the housing structure is used to be installed on the assembly component 4; the sensor assembly includes a light emitting unit, a filter unit, and a detection unit. The light emitting unit is used to provide the transmitted and scattered light required for signal detection. The filter unit is used to filter out the visible light on the water surface and other non-signal reflected light. The detection unit is used to detect the scattered signal or transmitted signal of the sediment or suspended matter to be measured in the water. The information processing assembly is connected to the detection unit and is used to convert the acquired optoelectronic signal into information containing sediment information.

[0031] In this embodiment, the first motor 6 is used to drive the first gear 7 to rotate. The first gear 7 meshes with the second gear 8 to drive the second gear 8 to rotate. The second gear 8 is connected to the assembly component 4, and the assembly component 4 is connected to the monitoring terminal 1. During the rotation of the second gear 8, the monitoring terminal 1 can be synchronously driven to rotate, which is beneficial to automatically adjust the angle of the monitoring terminal 1. Secondly, the first gear 7 is connected to the positioning mechanism. During the rotation of the first gear 7, the positioning mechanism is synchronously driven to rotate. The positioning mechanism is used to lock the assembly component 4. That is, through the synchronous rotation of the positioning mechanism and the assembly component 4, the positioning mechanism can always lock the assembly component 4, thereby ensuring the stability of the monitoring terminal 1 installed on the assembly component 4, avoiding the angle change caused by the monitoring terminal 1 sagging under the influence of gravity, and being beneficial to ensuring the accuracy of the monitoring result.

[0032] Optionally, as Figures 5 to 10 shown, the assembly component 4 includes a second support frame 9, a first mounting seat 10, a connecting shaft 11, a second motor 12, a first transmission shaft 13, a lead screw 14, a nut 15, a first clamping member 16, and a second clamping structure. The right end of the second support frame 9 is connected to the second gear 8. The left end of the second support frame 9 is connected to the first mounting seat 10 through the connecting shaft 11. An arc-shaped track 17 is provided on the left side of the first support frame 5. The connecting shaft 11 is slidably connected to the arc-shaped track 17; The second motor 12 is installed on the first mounting seat 10. The axial direction of the first transmission shaft 13 is in the left-right direction. The left and right ends of the first transmission shaft 13 are respectively rotatably connected to the first mounting seat 10 and the second support frame 9. A lead screw 14 is provided in the middle of the first transmission shaft 13. The nut 15 is connected to the lead screw 14. The first clamping member 16 is connected to the nut 15 and is located on the left side of the second clamping structure. The first clamping member 16 and the second clamping structure are used to clamp the monitoring terminal 1.

[0033] Specifically, the arc-shaped track 17, the first transmission shaft 13, and the second gear 8 are coaxially distributed.

[0034] In this embodiment, the second motor 12 is used to drive the first transmission shaft 13 to rotate to drive the lead screw 14 to rotate, so that the nut 15 on the lead screw 14 moves in the left-right direction. Since the nut 15 is connected to the first clamping member 16, the first clamping member 16 moves toward the side close to the second clamping structure. Since the housing structure is located between the first clamping member 16 and the second clamping structure, the housing structure can be clamped.

[0035] Secondly, by setting the second support frame 9 and the first mounting seat 10, and connecting the second support frame 9 with the second gear 8, when the second support frame 9 rotates with the second gear 8, it drives the first clamping member 16, the second clamping structure and the housing structure to rotate synchronously, which is beneficial to realizing the angle adjustment of the monitoring terminal 1. By connecting the second support frame 9 with the first mounting seat 10 through the connecting shaft 11, and installing the second motor 12 on the first mounting seat 10 and enabling the connecting shaft 11 to move within the arc-shaped track 17, the stability of the first mounting seat 10 and the second motor 12 during rotation can be ensured.

[0036] Optionally, as Figure 5 shown, the assembly component 4 further includes a first sliding track 18, the first sliding track 18 is connected to the second support frame 9 and extends in the left-right direction, and the nut 15 is slidably connected to the first sliding track 18.

[0037] Specifically, the first sliding track 18 is located at the lower end of the nut 15.

[0038] In this embodiment, by setting the first sliding track 18 and enabling the nut 15 to be slidably connected to the first sliding track 18, the stability and accuracy of the movement of the nut 15 in the left-right direction can be further improved. Secondly, when the entire assembly component 4 rotates to an inclined state, the nut 15 may be affected by gravity and it is difficult to be tightly connected to the lead screw 14, which may easily affect the movement of the nut 15 relative to the lead screw 14. By arranging the first sliding track 18 at the lower end of the nut 15, the nut 15 can be supported and limited, which is beneficial to overcoming the influence of gravity, enabling the nut 15 to always be tightly connected to the lead screw 14, and ensuring the stability of the movement of the nut 15 relative to the lead screw 14.

[0039] Optionally, as Figures 5 to 9 shown, the second clamping structure includes a second clamping member 19 and a second sliding track 20, the second sliding track 20 extends in the front-rear direction and is connected to the second support frame 9, the second clamping member 19 is slidably connected to the second sliding track 20 in the front-rear direction, the assembly component 4 further includes a third gear 21 and a rack 22, the rack 22 is connected to the second clamping member 19, the third gear 21 is connected to the first transmission shaft 13, and the third gear 21 meshes with the rack 22.

[0040] In this embodiment, the rotation of the first transmission shaft 13 drives the rotation of the third gear 21, and the engagement between the third gear 21 and the gear drives the second clamping member 19 to move in the front-rear direction. That is, when it is necessary to remove the housing structure from the assembly component 4, the second motor 12 is started, which can make the first clamping member 16 move to the left so that the first clamping member 16 disengages from the housing structure, or synchronously drive the second clamping member 19 to move backward so that the second clamping member 19 disengages from the housing structure, which is beneficial to realize rapid disassembly.

[0041] Optionally, as Figures 5 to 9 shown, the assembly component 4 further includes a first cam 23, a top plate 24, a clamping strip 25 and a first limiting block 26. The first cam 23 is connected to the first transmission shaft 13 and coaxially distributed with the first transmission shaft 13. A through hole is formed at the upper end of the first clamping member 16. The second clamping member 19 is provided with a clamping slot 27 with front and left openings. A plurality of the first limiting blocks 26 are arranged on the upper end inner wall of the clamping slot 27. One end of the clamping strip 25 is slidably connected to the through hole in the up-down direction, and the other end is used for inserting between two adjacent first limiting blocks 26 in the clamping slot 27. The upper end of the top plate 24 is connected to the clamping strip 25. The first cam 23 is used for abutting against the lower end of the top plate 24.

[0042] In this embodiment, during the process of locking the housing structure by the first clamping member 16 and the second clamping member 19, taking the left side as the front view, when the first transmission shaft 13 rotates counterclockwise, the lead screw 14 is driven to rotate, so that the nut 15 drives the first clamping member 16 to approach the second clamping member 19; secondly, when the first transmission shaft 13 rotates counterclockwise, the third gear 21 is driven to rotate, and by driving the rack 22 to move forward, the clamping strip 25 is inserted into the lower end of the clamping slot 27 from the front opening of the clamping slot 27; in addition, the first transmission shaft 13 rotates counterclockwise to drive the first cam to rotate counterclockwise, the first cam 23 jacks up the top plate 24, the top plate 24 drives the clamping strip 25 to enter between two adjacent first limiting blocks 26 in the clamping slot 27, and the two first limiting blocks 26 limit the front and rear side surfaces of the clamping strip 25, so as to realize the stable connection between the first clamping member 16 and the second clamping member 19 to ensure the stable clamping of the housing structure. In addition, by forming a through hole in the first clamping member 16 and slidably connecting the clamping strip 25 relative to the through hole in the up-down direction, the clamping strip 25 can be limited.

[0043] Optionally, as Figures 5 to 8 shown, the assembly component 4 further includes a second limiting block 28. The second limiting block 28 is L-shaped. One end of the second limiting block 28 is connected to the first clamping member 16, and the other end is located on the left side of the top plate 24.

[0044] In this embodiment, when the first cam 23 is used to push the top plate 24 during the up and down movement, the top plate 24 may drive the clamping strip 25 to move leftward, causing the clamping strip 25 to disengage from the card slot 27 and the first limiting block 26. By providing the second limiting block 28 to limit the top plate 24 using the second limiting block 28, it is possible to prevent the clamping strip 25 from disengaging from the card slot 27, which is beneficial for ensuring the limiting effect of the first limiting block 26 on the clamping strip 25.

[0045] Optionally, as Figures 6 to 9 shown, the positioning mechanism includes a second transmission shaft 29, a second cam 30, and a first abutting block 31. A first abutting block 31 is connected to the right end of the first cam 23. The second transmission shaft 29 is coaxially distributed and connected with the first gear 7. The second cam 30 is coaxially distributed and connected with the second transmission shaft 29. The lower end surface of the second cam 30 is used to abut against the upper end surface of the first abutting block 31.

[0046] In this embodiment, when it is necessary to drive the front end of the monitoring terminal 1 to tilt downward, with the left side as the front view, the first motor 6 is used to drive the first gear 7 to rotate clockwise. The first gear 7 meshes with the second gear 8 to drive the second gear 8 to rotate counterclockwise. The assembly component 4, the monitoring terminal 1, and the second gear 8 move synchronously. When the front end of the monitoring terminal 1 tilts downward synchronously, the first cam 23 in the assembly component 4 also rotates counterclockwise. Since a first abutting block 31 is connected to the right end of the first cam 23, the first abutting block 31 can be driven to rotate counterclockwise. The first gear 7 is connected to the second cam 30 through the second transmission shaft 29, so the second cam 30 and the second transmission shaft 29 rotate synchronously clockwise. The second cam 30 and the first abutting block 31 can move simultaneously, so that the second cam 30 neither hinders the movement of the first abutting block 31 nor can always abut against the upper end surface of the first abutting block 31 to limit the first cam 23. Therefore, when the front end of the monitoring terminal 1 shows a downward trend due to the influence of gravity when in an inclined state, the first cam 23 limits the first abutting block 31, making it difficult for the entire assembly component 4 to rotate. Then, the monitoring terminal 1 installed on the assembly component 4 is also difficult to be affected by gravity and sag, avoiding the angle change of the monitoring terminal 1 during the monitoring process, thereby ensuring the accuracy of the monitoring result.

[0047] Optionally, as Figures 6 to 9As shown, the positioning mechanism further includes a third transmission shaft 32, a third cam 33, a second abutting block 34, a first transmission wheel 35, a second transmission wheel 36, and a transmission belt 37. The second transmission shaft 29 and the third transmission shaft 32 are respectively located at the left and right ends of the second support frame 9 and are parallel in the axial direction. The left and right ends of the second transmission shaft 29 are respectively rotatably connected to the left and right ends of the second support frame 9. The first transmission wheel 35 is coaxially distributed and connected with the second transmission shaft 29. The second transmission wheel 36 is coaxially distributed and connected with the third transmission shaft 32. The first transmission wheel 35 is drivingly connected to the second transmission wheel 36 through the transmission belt 37; A second abutting block 34 is connected to the left end of the first cam 23. The third cam 33 is coaxially distributed and connected with the third transmission shaft 32. The upper end of the third cam 33 is used to abut against the lower end surface of the second abutting block 34.

[0048] Specifically, the transmission belt 37 is sleeved on the first transmission wheel 35 and the second transmission wheel 36.

[0049] In this embodiment, taking the left side as the front view, the first motor 6 is used to drive the first gear 7 to rotate clockwise. Since a second abutting block 34 is connected to the left end of the first cam 23, the second abutting block 34 can be driven to rotate counterclockwise. The first transmission wheel 35 is connected to the second transmission shaft 29, and the second transmission wheel 36 is connected to the third transmission shaft 32. During the clockwise rotation of the first gear 7, the second transmission shaft 29 is driven to rotate clockwise, and the first transmission wheel 35, the second transmission wheel 36, and the third transmission shaft 32 can be sequentially driven to rotate clockwise, thereby driving the third cam 33 to rotate clockwise. Then, the third cam 33 and the second abutting block 34 can move simultaneously, so that the third cam 33 neither hinders the movement of the second abutting block 34 nor can always abut against the lower end surface of the second abutting block 34 to limit the first cam 23. Thus, by using the second cam 30 to limit the upper end of the first abutting block 31 and using the third cam 33 to limit the lower end of the second abutting block 34, the stability of the first cam 23 can be further improved, making it difficult for the entire assembly component 4 to rotate. Then, the monitoring terminal 1 installed on the assembly component 4 is also difficult to sag due to the influence of gravity, avoiding the angle change of the monitoring terminal 1 during the monitoring process, and ensuring the accuracy of the monitoring result.

[0050] Optionally, as Figure 10 shown, the support assembly 2 includes a third support frame 38 and a cylinder 39. A plurality of the cylinders 39 are arranged at the upper end of the third support frame 38. The cylinders 39 are drivingly connected to the first support frame 5 and are used to drive the first support frame 5 to move in the up and down direction.

[0051] In this embodiment, by setting the cylinder 39 and using multiple cylinders 39 to simultaneously push the first support frame 5 to move in the up and down direction, the height of the monitoring terminal 1 can be adjusted. And by setting several cylinders 39, the acting force can be increased to ensure that there is sufficient acting force to push the first support frame 5 to move.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-dimensional on-line optoelectronic sediment monitor, characterized in that, It includes a monitoring terminal (1), a support component (2), an angle adjustment component (3) and an assembly component (4); the angle adjustment component (3) includes a first support frame (5), a first motor (6), a first gear (7), a second gear (8) and a positioning mechanism. The first support frame (5) is connected to the support component (2), the first motor (6) is connected to the first support frame (5) and is in transmission connection with the first gear (7). The axial directions of both the first gear (7) and the second gear (8) are towards the left and right directions. The first gear (7) meshes with the second gear (8), the second gear (8) is connected to the assembly component (4), and the positioning mechanism is connected to the first gear (7) and is used to lock the assembly component (4). The monitoring terminal (1) is installed on the assembly component (4). The monitoring terminal (1) includes a scattering detector, a receiving detector and a light emitting diode (LED) or a laser (LD), and is used for one-dimensional detection, two-dimensional detection or multi-dimensional detection. The receiving detector includes a photodiode (PD) or an avalanche photodiode (APD).

2. The multi-dimensional online photoelectric sediment monitor according to claim 1, characterized in that, The scattering detector has more than 2 spatial degrees of freedom. Its light source and multiple detection devices are in the XY plane, and the multiple detection devices detect photoelectric signals in the directions of 90°, 120° and 140° respectively. The monitoring terminal (1) is used for two-dimensional optical detection. Its two-dimensional optical device layout includes but is not limited to T and U-shaped structures. The optical detection surface of the two-dimensional optical device includes two or more photosensitive surfaces, and the photosensitive surfaces are distributed in an L shape, a U shape or a T shape. The hardware circuit design of the monitoring terminal (1) includes a signal drive, a photoelectric detection circuit, a signal processing circuit, a buck-boost function circuit, a high-precision 24-bit ADC signal acquisition and processing circuit, a temperature and humidity detection sensor chip and a clock function, and is used to display the data reading time.

3. The multi-dimensional online optoelectronic sediment monitor according to claim 1, characterized in that, The online signal processing and / or communication module of the monitoring terminal (1) is a CAN network control terminal based on STM32 + Quectel EC20. It uses RS485, 4G antenna and GPS antenna as communication methods to remotely transmit and manage data. It uses a CAN interface and supports users to customize and configure CAN data decoding scripts. The software algorithm of the monitoring terminal (1) includes an optimal current search algorithm, an optimal signal detection algorithm or a sediment concentration conversion algorithm.

4. The multi-dimensional on-line photoelectric sediment monitor according to claim 1, characterized in that, The assembly component (4) includes a second support frame (9), a first mounting seat (10), a connecting shaft (11), a second motor (12), a first transmission shaft (13), a lead screw (14), a nut (15), a first clamping member (16), and a second clamping structure. The right end of the second support frame (9) is connected to the second gear (8), and the left end of the second support frame (9) is connected to the first mounting seat (10) through the connecting shaft (11). An arc-shaped track (17) is provided on the left side of the first support frame (5), and the connecting shaft (11) is slidably connected to the arc-shaped track (17). The second motor (12) is installed on the first mounting seat (10). The axial direction of the first transmission shaft (13) is in the left-right direction. The left and right ends of the first transmission shaft (13) are respectively rotatably connected to the first mounting seat (10) and the second support frame (9). A lead screw (14) is provided in the middle of the first transmission shaft (13). The nut (15) is connected to the lead screw (14). The first clamping member (16) is connected to the nut (15) and is located on the left side of the second clamping structure. The first clamping member (16) and the second clamping structure are used to clamp the monitoring terminal (1).

5. The multi-dimensional on-line optoelectronic sediment monitor according to claim 4, wherein, The assembly component (4) further includes a first sliding track (18). The first sliding track (18) is connected to the second support frame (9) and extends in the left-right direction. The nut (15) is slidably connected to the first sliding track (18).

6. The multi-dimensional on-line photoelectric sediment monitor according to claim 5, characterized in that, The second clamping structure includes a second clamping member (19) and a second sliding track (20). The second sliding track (20) extends in the front-back direction and is connected to the second support frame (9). The second clamping member (19) is slidably connected to the second sliding track (20) in the front-back direction. The assembly component (4) further includes a third gear (21) and a rack (22). The rack (22) is connected to the second clamping member (19). The third gear (21) is connected to the first transmission shaft (13). The third gear (21) meshes with the rack (22).

7. The multi-dimensional online optoelectronic sediment monitor according to claim 6, wherein, The assembly component (4) further includes a first cam (23), a top plate (24), a clamping strip (25), and a first limiting block (26). The first cam (23) is connected to the first transmission shaft (13) and is coaxially distributed with the first transmission shaft (13). A through hole is provided at the upper end of the first clamping member (16). The second clamping member (19) is provided with a clamping groove (27) with front and left openings. A plurality of the first limiting blocks (26) are provided on the upper inner wall of the clamping groove (27). One end of the clamping strip (25) is slidably connected to the through hole in the up-down direction, and the other end is used to be inserted between two adjacent first limiting blocks (26) in the clamping groove (27). The upper end of the top plate (24) is connected to the clamping strip (25). The first cam (23) is used to abut against the lower end of the top plate (24).

8. The multi-dimensional online optoelectronic sediment monitor according to claim 7, wherein The assembly component (4) further includes a second limiting block (28), the second limiting block (28) is arranged in an L shape, one end of the second limiting block (28) is connected to the first clamping member (16), and the other end is located on the left side of the top plate (24).

9. The multi-dimensional on-line photoelectric sediment monitor according to claim 8, characterized in that, The positioning mechanism includes a second transmission shaft (29), a second cam (30) and a first abutting block (31). A first abutting block (31) is connected to the right end of the first cam (23). The second transmission shaft (29) is coaxially distributed and connected with the first gear (7). The second cam (30) is coaxially distributed and connected with the second transmission shaft (29). The lower end surface of the second cam (30) is used to abut against the upper end surface of the first abutting block (31).

10. The multi-dimensional online optoelectronic sediment monitor according to claim 9, characterized in that, The positioning mechanism further includes a third transmission shaft (32), a third cam (33), a second abutting block (34), a first transmission wheel (35), a second transmission wheel (36) and a transmission belt (37). The second transmission shaft (29) and the third transmission shaft (32) are respectively located at the left and right ends of the second support frame (9) and their axial directions are parallel. The left and right ends of the second transmission shaft (29) are respectively rotatably connected to the left and right ends of the second support frame (9). The first transmission wheel (35) is coaxially distributed and connected with the second transmission shaft (29). The second transmission wheel (36) is coaxially distributed and connected with the third transmission shaft (32). The first transmission wheel (35) is drivingly connected to the second transmission wheel (36) through the transmission belt (37). A second abutting block (34) is connected to the left end of the first cam (23). The third cam (33) is coaxially distributed and connected with the third transmission shaft (32). The upper end of the third cam (33) is used to abut against the lower end surface of the second abutting block (34).

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