Multi-dimensional online photoelectric sediment monitor

Abstract

The present invention belongs to the field of detection technology, and particularly relates to a multi-dimensional online photoelectric sediment monitor, comprising a monitoring terminal and a support assembly. The monitoring terminal includes a sensor assembly and an information processing assembly. 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 visible light and non-signal reflected light on the surface of the water body. The sensor assembly is used to detect the scattered signal or transmitted signal of the sediment or suspended matter to be detected in the water. The information processing assembly is connected to the sensor assembly and is used to convert the acquired photoelectric signal into information containing sediment information. The monitoring terminal is disposed on the support assembly, and the support assembly is used to support and maintain the height of the monitoring terminal at a preset position. The present invention can achieve efficient monitoring of sediment information in the water body to be detected, while reducing costs and improving the environmental adaptability, stability, and flexibility of the device.

Description

Technical Field

[0001] The invention belongs to the field of detection technology, and in particular relates to a multi-dimensional online photoelectric sediment monitor. Background Art

[0002] Sediment content in runoff is a key parameter in measuring soil erosion. Whether evaluating the extent of erosion in a watershed or a river channel, quantifying sediment content is essential to accurately simulate the dynamics of soil erosion and provide a sound scientific basis for decision-making in soil erosion control. To efficiently monitor sediment in water bodies, existing technologies use monitoring terminals, which are supported and adjusted in height by support components.

[0003] However, due to fluctuating water levels, the monitoring terminal must be adjusted to a certain height using a support assembly to ensure accurate water monitoring. Furthermore, the monitoring terminal's angle must be adjusted. When tilted toward the water, the terminal may sag due to gravity, causing angle changes during monitoring and potentially affecting the results. Therefore, it is necessary to design a multi-dimensional online photoelectric sediment monitor to address these issues. Summary of the Invention

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

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A multi-dimensional online photoelectric sediment monitor comprises a monitoring terminal and a support assembly. The monitoring terminal includes a sensor assembly and an information processing assembly. The sensor assembly comprises 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 visible light and non-signal reflected light from the water surface. The sensor assembly is used to detect the scattered or transmitted signals of the sediment or suspended matter to be measured in the water. The information processing assembly is connected to the sensor assembly and is used to convert the acquired photoelectric signals into information containing sediment information. The monitoring terminal is mounted on the support assembly, which is used to support and maintain the monitoring terminal at a preset height. The present invention can achieve efficient monitoring of sediment information in the water to be measured, while reducing costs and improving the environmental adaptability, stability, and flexibility of the device.

[0007] A multi-dimensional online photoelectric sediment monitor includes a monitoring terminal, a support assembly, an angle adjustment assembly and an assembly assembly; 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 transmission-connected to the first gear, the axial directions of the first gear and the second gear are both facing left and right, the first gear is meshed with the second gear, the second gear is connected to the assembly assembly, the positioning mechanism is connected to the first gear and is used to lock the assembly assembly, the monitoring terminal is used to be installed on the assembly assembly, the monitoring terminal includes a scattering detector, a receiving detector and a light emitting diode (LED) or a laser (LD), for implementing one-dimensional detection, two-dimensional detection or multi-dimensional detection, the receiving detector includes a photodiode (PD) or an avalanche diode (APD).

[0008] Furthermore, the scattering detector has more than two 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 is used to implement 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 L-shape, U-shape or T-shape. The hardware circuit design of the monitoring terminal includes signal driving, photoelectric detection circuit and signal processing circuit, buck-boost function circuit, high-precision 24-bit ADC signal acquisition and processing circuit, temperature and humidity detection sensor chip and clock function for displaying data reading time.

[0009] Furthermore, the monitoring terminal's online signal processing and / or communication module is a CAN network control terminal based on STM32+Quectel EC20, which remotely transmits and manages data. It uses a CAN interface and supports user-defined configuration of CAN data decoding scripts. The monitoring terminal's software algorithms include optimal current search algorithm, optimal signal detection algorithm or sediment concentration conversion algorithm.

[0010] Furthermore, 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, an arc track is opened on the left side of the first support frame, and the connecting shaft is slidably connected to the arc track;

[0011] The second motor is mounted on the first mounting seat, the axial direction of the first transmission shaft is facing left and right, the left and right ends of the first transmission shaft are rotatably connected to the first mounting seat and the second support frame respectively, the middle part of the first transmission shaft is provided with the lead screw, the lead screw is connected to the nut, 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.

[0012] Furthermore, the assembly component also includes a first sliding rail, which is connected to the second support frame and extends in the left-right direction, and the nut is slidably connected to the first sliding rail.

[0013] Furthermore, the second clamping structure includes a second clamping member and a second sliding rail, the second sliding rail extends in the front-to-back direction and is connected to the second support frame, the second clamping member is slidably connected to the second sliding rail in the front-to-back direction, and the assembly component also includes a third gear and a rack, the rack is connected to the second clamping member, the third gear is connected to the first transmission shaft, and the third gear is engaged with the rack.

[0014] Furthermore, the assembly component also includes a first cam, a top plate, a clamping strip and a first limit block, the first cam is connected to the first transmission shaft and is coaxially distributed with the first transmission shaft, the upper end of the first clamping member is provided with a through hole, the second clamping member is provided with a clamping slot with openings on the front and left sides, and a plurality of first limit blocks are provided at the upper end of the inner wall of the slot, one end of the clamping strip is slidably connected to the through hole in the up and down directions, and the other end is used to be inserted between two adjacent first limit blocks in the slot, 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.

[0015] Furthermore, the assembly component also includes a second limit block, which is configured to be L-shaped, one end of which is connected to the first clamping member, and the other end of which is located on the left side of the top plate.

[0016] Furthermore, the positioning mechanism includes a second transmission shaft, a second cam and a first abutment block, the right end of the first cam is connected to the first abutment block, the second transmission shaft is coaxially distributed and connected to the first gear, the second cam is coaxially distributed and connected to the second transmission shaft, and the lower end face of the second cam is used to abut against the upper end face of the first abutment block.

[0017] Furthermore, the positioning mechanism also includes a third transmission shaft, a third cam, a second abutment 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 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 to the second transmission shaft, the second transmission wheel is coaxially distributed and connected to the third transmission shaft, and the first transmission wheel is transmission-connected to the second transmission wheel via the transmission belt;

[0018] The left end of the first cam is connected to the second abutment block, the third cam is coaxially distributed and connected to the third transmission shaft, and the upper end of the third cam is used to abut against the lower end surface of the second abutment block.

[0019] Furthermore, the support assembly includes a third support frame and a cylinder. A plurality of cylinders are provided on the upper end of the third support frame. The cylinders are transmission-connected to the first support frame and are used to drive the first support frame to move in the up and down directions.

[0020] The technical effects and advantages of the present invention are as follows:

[0021] 1. Use the first motor to drive the first gear to rotate, use the first gear to engage with the second gear to drive the second gear to rotate, use the second gear to connect with 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 driven to rotate synchronously, which is conducive to automatically adjusting the angle of the monitoring terminal.

[0022] 2. The first gear is connected to the positioning mechanism. The first gear rotates to synchronously drive the positioning mechanism to rotate, and the positioning mechanism is used to lock the assembly component. That is, the positioning mechanism and the assembly component rotate synchronously, so that the positioning mechanism can always lock the assembly component, thereby ensuring the stability of the monitoring terminal installed on the assembly component, preventing the monitoring terminal from sagging due to gravity and causing angle changes, which is conducive to ensuring the accuracy of the monitoring results.

[0023] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A diagram showing the use status of a multi-dimensional online photoelectric sediment monitor according to an embodiment of the present invention is shown;

[0026] Figure 2 The multi-dimensional optical near-infrared detection diagram of the embodiment of the present invention is shown. Figure 1 ;

[0027] Figure 3 The multi-dimensional optical near-infrared detection diagram of the embodiment of the present invention is shown. Figure 2 ;

[0028] Figure 4 A schematic diagram of a test curve in air according to an embodiment of the present invention is shown;

[0029] Figure 5 A schematic structural diagram of an assembly component according to an embodiment of the present invention is shown;

[0030] Figure 6 A schematic structural diagram showing another perspective of an assembly component according to an embodiment of the present invention is shown;

[0031] Figure 7 A schematic structural diagram of an angle adjustment assembly according to an embodiment of the present invention is shown;

[0032] Figure 8 A schematic structural diagram showing another perspective of the angle adjustment assembly according to an embodiment of the present invention is shown;

[0033] Figure 9 A partial structural schematic diagram of an angle adjustment assembly according to an embodiment of the present invention is shown;

[0034] Figure 10 A structural schematic diagram of a support assembly according to an embodiment of the present invention is shown.

[0035] In the figure: 1. Monitoring terminal; 2. Support assembly; 3. Angle adjustment assembly; 4. Assembly assembly; 5. First support frame; 6. First motor; 7. First gear; 8. Second gear; 9. Second support frame; 10. First mounting base; 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. Snap-in strip; 26. First limit block; 27. Slot; 28. Second limit block; 29. ​​Second transmission shaft; 30. Second cam; 31. First abutment block; 32. Third transmission shaft; 33. Third cam; 34. Second abutment block; 35. First transmission wheel; 36. Second transmission wheel; 37. Transmission belt; 38. Third support frame; 39. Cylinder. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making creative efforts shall fall within the scope of protection of the present invention.

[0037] like Figures 1 to 10 As shown, a multi-dimensional online photoelectric sediment monitor of an embodiment of the present invention 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 transmission-connected to the first gear 7, the axial directions of the first gear 7 and the second gear 8 are both facing left and right, the first gear 7 is meshed with the second gear 8, the second gear 8 is connected to the assembly component 4, the positioning mechanism is connected to the first gear 7, and is used to lock the assembly component 4, and the monitoring terminal 1 is used to be installed on the assembly component 4.

[0038] See also Figure 2-Figure 4 This device utilizes a multi-dimensional optical near-infrared detection method and a high-precision processing algorithm to enable online measurement of suspended turbidity and sediment concentration. It supports RS485 Modbus communication protocol and local USB data storage, offering a wide range, high measurement accuracy, and long standby time.

[0039] The loss of light energy after passing through the sediment-laden water flow is calculated using formula (1) as follows:

[0040] (1)

[0041] Where: I is the initial light energy intensity, in candela (cd); It is the remaining light energy intensity after light passes through the sediment-laden water flow, in candela (cd); is the absorption coefficient of light energy by the sediment-laden water flow; is the scattering coefficient of the sand-laden water flow on light energy; L is the transmission distance of light in the sand-laden water flow; It is the dissipation coefficient of light energy after passing through the sand-laden water flow.

[0042] The calculation formula for measuring suspended sediment concentration using the light reflection method can be expressed as formula (2).

[0043] (2)

[0044] According to Mie scattering law, the scattering coefficient of light in sediment-laden water flow is calculated using formula (3):

[0045] (3)

[0046] Where: K is the extinction coefficient of the sediment-laden water flow; It is the number of suspended sand particles in a unit volume of sediment-laden water flow; is the median particle size of suspended sand particles.

[0047] The intensity of scattered light after passing through the sediment-laden water 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 sand particles in the sediment-laden water flow per unit volume and the median particle size of the suspended sand particles. The calculation formula of the extinction coefficient K can be written as formula (4)

[0048] (4)

[0049] Where m, n, k and m are unknown coefficients that need to be determined through specific experiments; C represents the suspended sediment concentration, g / L; Indicates the density of suspended sand particles, kg / m3.

[0050] Substituting equation (4) into equation (2) we can get the initial light energy intensity Relationship with the light energy I reflected back after passing through the sand-laden water flow:

[0051] (5)

[0052] The principle formula for measuring suspended sediment concentration by light scattering method can be written as formula (6):

[0053] (6)

[0054] Specifically, the monitoring terminal 1 includes a sensor component, an information processing component and a shell structure, the sensor component and the information processing component are both installed in the shell structure, and the shell structure is used to be installed on the assembly component 4; the sensor component 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 visible light and other non-signal reflected light on the surface of the water body, the detection unit is used to detect the scattered signal or transmitted signal of the sediment or suspended matter to be tested in the water, and the information processing component is connected to the detection unit to convert the acquired photoelectric signal into information containing sediment information.

[0055] In this embodiment, the first motor 6 is used to drive the first gear 7 to rotate, the first gear 7 is engaged with the second gear 8, and the second gear 8 is driven 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. Therefore, during the rotation of the second gear 8, the monitoring terminal 1 can be synchronously driven to rotate, which is conducive to automatically adjusting the angle of the monitoring terminal 1. Secondly, the first gear 7 is connected to the positioning mechanism, and during the rotation of the first gear 7, the positioning mechanism is synchronously driven to rotate, and the positioning mechanism is used to lock the assembly component 4. That is, the positioning mechanism and the assembly component 4 rotate synchronously, so that 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, preventing the monitoring terminal 1 from sagging due to gravity and causing the angle to change, which is conducive to ensuring the accuracy of the monitoring results.

[0056] Alternatively, as Figures 5 to 10 As 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, 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 track 17 is opened on the left side of the first support frame 5, and the connecting shaft 11 is slidably connected to the arc track 17;

[0057] The second motor 12 is installed on the first mounting seat 10, and the axial direction of the first transmission shaft 13 is facing left and right. The left and right ends of the first transmission shaft 13 are rotatably connected to the first mounting seat 10 and the second support frame 9 respectively. The middle part of the first transmission shaft 13 is provided with the screw 14, and the nut 15 is connected to the 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.

[0058] Specifically, the arc track 17 , the first transmission shaft 13 and the second gear 8 are coaxially distributed.

[0059] In this embodiment, the second motor 12 is used to drive the first transmission shaft 13 to rotate to drive the screw 14 to rotate, so that the nut 15 on the screw 14 moves in the left and right directions. The nut 15 is connected to the first clamping member 16, so that the first clamping member 16 moves toward the side close to the second clamping structure. Since the outer shell structure is located between the first clamping member 16 and the second clamping structure, the outer shell structure can be clamped.

[0060] Secondly, by providing the second support frame 9 and the first mounting base 10, and utilizing the second support frame 9 to connect with the second gear 8, the second support frame 9 rotates along with the second gear 8, thereby driving the first clamping member 16, the second clamping structure, and the outer shell structure to rotate synchronously, thereby facilitating the angle adjustment of the monitoring terminal 1. Furthermore, by utilizing the second support frame 9 to connect with the first mounting base 10 via the connecting shaft 11, the second motor 12 is mounted on the first mounting base 10, and the connecting shaft 11 is used to move within the arc track 17, the stability of the first mounting base 10 and the second motor 12 during rotation can be ensured.

[0061] Alternatively, as Figure 5 As shown, the assembly component 4 further includes a first sliding rail 18 , which 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 rail 18 .

[0062] Specifically, the first sliding track 18 is located at the lower end of the nut 15 .

[0063] In this embodiment, by providing a first sliding track 18 and utilizing the nut 15 to be slidably connected to the first sliding track 18, the stability and accuracy of the left-right movement of the nut 15 can be further improved. Secondly, when the assembly 4 is rotated as a whole to an inclined state, the nut 15 may be affected by gravity, making it difficult to maintain a tight connection with the lead screw 14, which can easily affect the movement of the nut 15 relative to the lead screw 14. However, by providing the first sliding track 18 at the lower end of the nut 15, the nut 15 can be supported and limited, which helps to overcome the influence of gravity, ensuring that the nut 15 is always tightly connected to the lead screw 14 and ensuring the stability of the movement of the nut 15 relative to the lead screw 14.

[0064] Alternatively, as Figures 5 to 9 As shown, the second clamping structure includes a second clamping member 19 and a second sliding rail 20, the second sliding rail 20 extends in the front-to-back direction and is connected to the second support frame 9, the second clamping member 19 is slidably connected to the second sliding rail 20 in the front-to-back direction, and the assembly component 4 also 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 is engaged with the rack 22.

[0065] In this embodiment, the first transmission shaft 13 is rotated to drive the third gear 21 to rotate, and the third gear 21 is engaged with the gear to drive the second clamping member 19 to move in the front-to-back direction. That is, when the outer shell structure needs to be removed from the assembly component 4, the second motor 12 is started, which can not only move the first clamping member 16 to the left, so that the first clamping member 16 is separated from the outer shell structure, but also synchronously drive the second clamping member 19 to move backward, so that the second clamping member 19 is separated from the outer shell structure, which is conducive to quick disassembly.

[0066] Alternatively, as Figures 5 to 9 As shown, the assembly component 4 also includes a first cam 23, a top plate 24, a clamping strip 25 and a first limit block 26. The first cam 23 is connected to the first transmission shaft 13 and is coaxially distributed with the first transmission shaft 13. The upper end of the first clamping member 16 is provided with a through hole, and the second clamping member 19 is provided with a clamping slot 27 with openings on the front and left sides. A plurality of first limit blocks 26 are provided at the upper end of the inner wall of the clamping slot 27. One end of the clamping strip 25 is slidably connected to the through hole in the up and down directions, and the other end is used to be inserted between two adjacent first limit blocks 26 in the clamping slot 27. The upper end of the top plate 24 is connected to the clamping strip 25, and the first cam 23 is used to abut against the lower end of the top plate 24.

[0067] In this embodiment, in the process of locking the shell structure by using the first clamping member 16 and the second clamping member 19, with the left side as the front perspective, the first transmission shaft 13 is used to drive the screw 14 to rotate during counterclockwise rotation, so that the nut 15 drives the first clamping member 16 to approach the second clamping member 19; secondly, the first transmission shaft 13 is used to drive the third gear 21 to rotate during counterclockwise rotation, and by driving the rack 22 to move forward, the clamping strip 25 is inserted from the front opening of the clamping slot 27 to the lower end of the clamping slot 27; in addition, the first transmission shaft 13 is used to drive the first cam to rotate counterclockwise by rotating counterclockwise, and the first cam 23 is used to push the top plate 24 upward, and the top plate 24 is used to drive the clamping strip 25 to enter between the two adjacent first limit blocks 26 in the clamping slot 27, and the two first limit blocks 26 are used to limit the front and rear sides of the clamping strip 25, so as to achieve a stable connection between the first clamping member 16 and the second clamping member 19 to ensure stable clamping of the shell structure. In addition, by forming a through hole on the first clamping member 16 and utilizing the clamping strip 25 to slide relative to the through hole in the up-down direction, the clamping strip 25 can be limited.

[0068] Alternatively, as Figures 5 to 8 As shown, the assembly component 4 further includes a second limit block 28 , which is configured to be L-shaped. One end of the second limit 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 .

[0069] In this embodiment, when the top plate 24 is pushed up and down by the first cam 23, the top plate 24 may drive the connecting strip 25 to move leftward, causing the connecting strip 25 to disengage from the slot 27 and the first limiting block 26. By providing the second limiting block 28 and limiting the top plate 24, the connecting strip 25 can be prevented from disengaging from the slot 27, thereby ensuring that the first limiting block 26 can limit the connecting strip 25.

[0070] Alternatively, as Figures 6 to 9 As shown, the positioning mechanism includes a second transmission shaft 29, a second cam 30 and a first abutment block 31. The right end of the first cam 23 is connected to the first abutment block 31. The second transmission shaft 29 is coaxially distributed and connected to the first gear 7. The second cam 30 is coaxially distributed and connected to the second transmission shaft 29. The lower end face of the second cam 30 is used to abut against the upper end face of the first abutment block 31.

[0071] In this embodiment, when the front end of the monitoring terminal 1 needs to be tilted downward, with the left side as the front view, the first motor 6 is used to drive the first gear 7 to rotate clockwise, and the first gear 7 is meshed with the second gear 8 to drive the second gear 8 to rotate counterclockwise, and 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. The first abutment block 31 is connected to the right end of the first cam 23, which can drive the first abutment block 31 to rotate counterclockwise. The first gear 7 is connected to the second cam 30 via the second transmission shaft 29. The second cam 30 and the second transmission shaft 29 rotate synchronously clockwise, so that the second cam 30 and the first abutment block 31 can move simultaneously, so that the second cam 30 neither hinders the movement of the first abutment block 31 nor always abuts against the upper end surface of the first abutment block 31 to limit the first cam 23. Therefore, when the front end of the monitoring terminal 1 tends to sag due to the influence of gravity due to its tilted state, the first cam 23 is used to limit the first abutment block 31, so that the assembly component 4 as a whole is difficult to rotate, and the monitoring terminal 1 installed on the assembly component 4 is also difficult to sag due to the influence of gravity, thereby avoiding the angle change of the monitoring terminal 1 during the monitoring process, thereby ensuring the accuracy of the monitoring results.

[0072] Alternatively, as Figures 6 to 9 As shown, the positioning mechanism also includes a third transmission shaft 32, a third cam 33, a second abutment 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 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 to the second transmission shaft 29. The second transmission wheel 36 is coaxially distributed and connected to the third transmission shaft 32. The first transmission wheel 35 is transmission-connected to the second transmission wheel 36 through the transmission belt 37.

[0073] The left end of the first cam 23 is connected to the second abutment block 34 . The third cam 33 is coaxially distributed and connected to 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 abutment block 34 .

[0074] Specifically, the transmission belt 37 is sleeved on the first transmission wheel 35 and the second transmission wheel 36 .

[0075] In this embodiment, from the left side as the front view, the first motor 6 drives the first gear 7 to rotate clockwise, and the second abutment block 34 is connected to the left end of the first cam 23, which can drive the second abutment block 34 to rotate counterclockwise. The second transmission shaft 29 is connected to the first transmission wheel 35, and the third transmission shaft 32 is connected to the second transmission wheel 36. The clockwise rotation of the first gear 7 drives the second transmission shaft 29 to rotate clockwise, which in turn drives the first transmission wheel 35, the second transmission wheel 36, and the third transmission shaft 32 to rotate clockwise, thereby driving the third cam 33 to rotate clockwise. The third cam 33 and the second abutment block 34 can move simultaneously, so that the third cam 33 neither hinders the movement of the second abutment block 34 nor always abuts against the lower end surface of the second abutment block 34 to limit the first cam 23. Therefore, by using the second cam 30 to limit the upper end of the first abutment block 31 and using the third cam 33 to limit the lower end of the second abutment block 34, the stability of the first cam 23 can be further improved, making it difficult for the assembly component 4 as a whole to rotate, and the monitoring terminal 1 installed on the assembly component 4 is also difficult to sag due to gravity, avoiding the angle change of the monitoring terminal 1 during the monitoring process, thereby ensuring the accuracy of the monitoring results.

[0076] Alternatively, as Figure 10 As shown, the support assembly 2 includes a third support frame 38 and a cylinder 39. A plurality of cylinders 39 are provided on the upper end of the third support frame 38. The cylinders 39 are transmission-connected to the first support frame 5 and are used to drive the first support frame 5 to move in the up and down directions.

[0077] In this embodiment, by providing cylinders 39, multiple cylinders 39 are used to simultaneously push the first support frame 5 in the up and down directions, thereby adjusting the height of the monitoring terminal 1. Providing multiple cylinders 39 can increase the force, ensuring that there is sufficient force to push the first support frame 5 to move.

[0078] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; 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 online photoelectric sediment monitor, characterized in that: The invention comprises a monitoring terminal (1), a support component (2), an angle adjustment component (3) and an assembly component (4); the angle adjustment component (3) comprises a first support frame (5), a first motor (6), a first gear (7), a second gear (8) and a positioning mechanism, wherein 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 the first gear (7) and the second gear (8) are both oriented in the left and right directions, the first gear (7) is meshed with the second gear (8), the second gear (8) is connected to the assembly component (4), the positioning mechanism is connected to the first gear (7) and is used to lock the assembly component (4), the monitoring terminal (1) is mounted on the assembly component (4), the monitoring terminal (1) comprises a scattering detector, a receiving detector and a light emitting diode (LED) or a laser (LD), and is used to implement one-dimensional detection, two-dimensional detection or multi-dimensional detection, the receiving detector comprises a photodiode (PD) or an avalanche diode (APD); The positioning mechanism comprises a second transmission shaft (29), a second cam (30) and a first abutment block (31); the assembly component (4) is connected to the first abutment block (31); the second transmission shaft (29) is coaxially distributed and connected to the first gear (7); the second cam (30) is coaxially distributed and connected to the second transmission shaft (29); and the lower end surface of the second cam (30) is used to abut against the upper end surface of the first abutment block (31).

2. The multi-dimensional online photoelectric sediment monitor according to claim 1, characterized in that: The scattering detector has more than two spatial degrees of freedom, and its light source and multiple detection devices are in the XY plane. The multiple detection devices detect photoelectric signals in the directions of 90°, 120° and 140° respectively. The monitoring terminal (1) is used to implement two-dimensional optical detection. 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 signal driving, photoelectric detection circuit and signal processing circuit, buck-boost function circuit, high-precision 24-bit ADC signal acquisition and processing circuit, temperature and humidity detection sensor chip and clock function.

3. The multi-dimensional online photoelectric 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, which remotely transmits and manages data, adopts a CAN interface, and supports user-defined configuration of 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 online photoelectric sediment monitor according to claim 1, characterized in that: The assembly component (4) comprises 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, wherein 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) via the connecting shaft (11), an arc 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 track (17); the second motor (12) is connected to the first transmission shaft (13), a lead screw (14), a nut (15), a first clamping member (16) and a second clamping structure, wherein 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) via the connecting shaft (11), and an arc track (17) is provided on the left side of the first support frame (5). The machine (12) is mounted on the first mounting seat (10), the axial direction of the first transmission shaft (13) faces left and right, the left and right ends of the first transmission shaft (13) are rotatably connected to the first mounting seat (10) and the second support frame (9), respectively, the middle part of the first transmission shaft (13) is provided with the lead screw (14), the lead screw (14) is connected to the nut (15), the first clamping member (16) is connected to the nut (15) and is located on the left side of the second clamping structure, and the first clamping member (16) and the second clamping structure are used to clamp the monitoring terminal (1).

5. The multi-dimensional online photoelectric sediment monitor according to claim 4, characterized in that: The assembly component (4) further includes a first sliding rail (18), the first sliding rail (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 rail (18).

6. The multi-dimensional online 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-to-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-to-back direction, and the assembly component (4) also 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) is meshed with the rack (22).

7. The multi-dimensional online photoelectric sediment monitor according to claim 6, characterized in that: The assembly component (4) further comprises a first cam (23), a top plate (24), a snap-fit ​​strip (25) and a first limit block (26), wherein the first cam (23) is connected to the first transmission shaft (13) and is coaxially distributed with the first transmission shaft (13), the right end of the first cam (23) is connected to the first abutment block (31), the upper end of the first clamping member (16) is provided with a through hole, the second clamping member (19) is provided with a slot (27) with front and left openings, and the upper end of the inner wall of the slot (27) is provided with a plurality of the first limit blocks (26), one end of the snap-fit ​​strip (25) is connected to the through hole in an up-down sliding direction, and the other end is used to be inserted between two adjacent first limit blocks (26) in the slot (27), the upper end of the top plate (24) is connected to the snap-fit ​​strip (25), and the first cam (23) is used to abut against the lower end of the top plate (24).

8. The multi-dimensional online photoelectric sediment monitor according to claim 7, characterized in that: The assembly component (4) further includes a second limit block (28), which is configured to be L-shaped. One end of the second limit 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 online photoelectric sediment monitor according to claim 7, 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 are parallel in 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 to the second transmission shaft (29). The second transmission wheel (36) is coaxially distributed and connected to the third transmission shaft (32). The first transmission wheel (35) is transmission-connected to the second transmission wheel (36) through the transmission belt (37). The left end of the first cam (23) is connected to the second abutting block (34). The third cam (33) is coaxially distributed and connected to 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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