Method for measuring timber on board

Abstract

This invention discloses a method for measuring the volume of timber on a vehicle. The timber on a timber truck in the driving lane extends in the left-right direction. A three-dimensional laser scanner scans the timber pile on the timber truck, and the software obtains a simulation model and the cross-sectional area S of the left end of each timber. 左 and the right-hand cross-sectional area S 右 The cross-sectional area S of the timber is determined by the average value. The average length of the multiple timbers on the upper surface of the model is determined as the length L of each timber. The volume of each timber is V = S × L. The total volume V of the timber on the vehicle is obtained by summing all the timbers. 总 The cross-sectional area S of each piece of timber is compared with the qualified value S0, and the sum of the cubic meters of all qualified timber is V. 合 When the percentage of qualified timber in this shipment is α≥α0, the timber in this shipment is deemed acceptable for purchase. This invention automatically acquires timber stack information, accurately determines whether each piece of timber and the timber stack as a whole are qualified, improves procurement efficiency, and provides timber suppliers with more accurate and reasonable evaluations; each piece of timber is entered into the information database for easy production tracking.

Description

Technical Field

[0001] This invention relates to timber processing, and more particularly to a method for measuring the volume of timber on a vehicle. Background Technology

[0002] In the wood-based panel processing industry, timber is the raw material for various boxes and cabinets, obtained by cutting logs provided by planters. In the particleboard sector, planters transport timber by truck to particleboard manufacturers, who then decide whether to purchase it based on the diameter of the logs (thinner logs are difficult to shaving or have higher particleboard costs).

[0003] In the existing technology, the purchasing workers of particleboard manufacturers use their eyesight to identify the size of the shaft diameter of each piece of wood, and then roughly estimate the volume of qualified wood (i.e., the volume / cubic meters of the wood with the correct diameter). It can be seen that their assessment results are relatively rough. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems mentioned above, and provides a method for measuring the volume of timber on a vehicle, so as to accurately evaluate the timber on the vehicle.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for measuring the volume of timber on a vehicle includes the following steps:

[0007] The timber-loaded vehicle enters the driving lane in a front-to-back direction, with the timber on the vehicle extending in a left-to-right direction.

[0008] Three-dimensional scanning and modeling: Three-dimensional laser scanners on the left and right sides of the driving channel scan the timber pile on the timber truck. At least one three-dimensional laser scanner is higher than the timber pile and scans the timber pile. The controller replicates the timber pile in the three-dimensional coordinate system of the software based on the contour points measured by the three-dimensional laser scanner, and obtains a simulation model in the three-dimensional coordinate system of the software.

[0009] Model data reading and calculation: Based on the left and right outlines of the timber stack model, read the cross-sectional area of ​​the left end of each timber. and the cross-sectional area of ​​the right end , the cross-sectional area of ​​the left end and the cross-sectional area of ​​the right end The average of the two is established as the cross-sectional area of ​​the wood. The average length of the multiple logs displayed on the upper surface of the timber stack model is established as the length value of each log. ,

[0010] Based on the cross-sectional area of ​​each piece of wood and length value Calculate the volume of each type of timber. The sum of the volume of all timber is the total volume of timber loaded onto the vehicle. ,

[0011] Cross-sectional area of ​​each piece of wood Comparison of qualified values To determine whether a piece of timber is qualified, the sum of the cubic meters of all qualified timber is: Calculate the percentage of qualified timber in this train trip. When the proportion of qualified timber At that time, it was determined that the timber for this train could be purchased;

[0012] The model's end face has several closed loops, with a degree of roundness. The closed loop is defined as the cross-section of the wood, and the other closed loops are defined as the void cross-section;

[0013] In the aforementioned 3D scanning and modeling steps, the forward and backward directions correspond to the X-axis of the software's 3D coordinate system, the left and right directions correspond to the Y-axis of the software's 3D coordinate system, and the up and down directions correspond to the Z-axis of the software's 3D coordinate system. The overlap of the projections of a left-end section and a right-end section onto the Y-axis is also considered. At that time, it was determined that the left end section and the right end section belonged to the same type of timber.

[0014] Compared with existing technologies, the beneficial effects of this application include: automatically acquiring information about timber piles, accurately determining whether each piece of timber and the timber pile as a whole are qualified, improving procurement efficiency, and providing timber suppliers with a more accurate and reasonable evaluation of whether to buy or sell; each piece of timber has been entered into the controller, which also makes it easier to create a database summarizing all timber in the plant area, facilitating production follow-up.

[0015] As an improvement to the above technical solution, the outline color of the wood end face is darker than the annual ring lines of the wood, and the wood outline is determined according to the color of each line of the model.

[0016] As an improvement to the above technical solution, in the three-dimensional scanning and modeling step, when the wood-carrying cart is long, the slide table drives the three-dimensional laser scanner to move in the front-back direction.

[0017] As an improvement to the above technical solution, an entry verification step is also included. The robotic arm transfers the timber from the timber truck to the ground of the storage area in batches, or the timber truck dumps the timber onto the ground of the storage area. If the inspection staff finds timber with large curvature or short filler timber, the timber of that batch is discarded.

[0018] As an improvement to the above technical solution, the traveling rack extends in the front-to-back direction and is mounted on the ground support. The traveling motor is mounted on the slide, and the traveling gear is connected to the rotating shaft of the traveling motor and meshes with the traveling rack.

[0019] As an improvement to the above technical solution, the lower end of the slide is connected to a mounting plate, the shaft shoulder of the traveling gear is clamped with a locking nut to hold a thrust bearing, the mounting plate supports the locking nut through the thrust bearing, the shaft of the traveling motor passes through the slide and is connected to the shaft of the traveling gear through a coupling, and the traveling motor is adapted to drive the slide to move back and forth along the track.

[0020] As an improvement to the above technical solution, the mounting plate is connected to an end cap, which covers the thrust bearing and, together with the mounting plate, clamps the outer ring of the thrust bearing.

[0021] As an improvement to the above technical solution, an anti-interference sunshade is also included. The track, the vehicle passage, and the 3D laser scanner are all installed in the anti-interference sunshade, which is also suitable for rain protection. Attached Figure Description

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of the vehicle-mounted timber measuring device according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A partial structural schematic diagram of the vehicle-mounted timber measuring device is shown.

[0025] Figure 3 for Figure 2 A top view of the structure is shown;

[0026] Figure 4 for Figure 2 The right view of the structure is shown;

[0027] Figure 5 for Figure 2 A partial structural diagram;

[0028] Figure 6 for Figure 5 An exploded view of the structure is shown;

[0029] Figure 7 This is a schematic diagram of the vehicle-mounted timber measuring device combined with vehicle-mounted timber according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram illustrating the process of measuring timber volume on a vehicle in an embodiment of the present invention.

[0031] Track 100;

[0032] 200 lanes for vehicles;

[0033] Sliding assembly 300, slide table 310, displacement power structure 320, traveling rack 321, traveling gear 322, traveling motor 323;

[0034] Column 400, T-shaped buckle slot 410;

[0035] 500 3D laser scanner;

[0036] Ground support 600, horizontal plate 610, vertical pile 620;

[0037] Baffle 710, proximity switch 720;

[0038] Mounting plate 810, lock nut 820, thrust bearing 830, coupling 840, end cover 850;

[0039] 900 wood-carrying vehicles. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] Reference Figures 1 to 4 , Figure 7 This invention provides a vehicle-mounted timber measuring device, comprising two spaced-apart tracks 100, two sliding components 300, a three-dimensional laser scanner 500, and a controller. The tracks 100 extend in a front-to-back direction, and a travel channel 200 is provided between the two tracks 100. The travel channel 200 is suitable for a timber truck 900 to stop and pass through. The sliding components 300 correspond one-to-one with the tracks 100. Each sliding component 300 includes a slide 310 and a displacement power structure 320. The slide 310 is mounted on the track 100, and the displacement power structure 320 is suitable for driving the slide 310 to slide along the track 100. The slide 310 is connected to an upwardly extending column 400. The three-dimensional laser scanner 500 is mounted on the column 400, and the scanning port of the three-dimensional laser scanner 500 faces the travel channel 200. The controller is electrically connected to the displacement power structure 320 and the three-dimensional laser scanner 500.

[0042] Reference Figure 1 It is understandable that the two tracks 100 mentioned above are transformed into a track group, which is an equivalent replacement; a travel channel 200 is set between the two track groups, and a single track group includes two tracks in order to support the slide 300 more smoothly.

[0043] It is understandable that the timber sold on the timber cart 900 is relatively straight, and timber with wormholes is discarded. The length of the timber sold is within a certain small deviation range. The controller is standard knowledge; common controllers include PLCs, microcontrollers, DSPs, FPGAs, and personal computers (PCs). The 3D laser scanner 500 and its controller are both standard knowledge and constitute the hardware of a 3D laser scanning system. Connecting the 3D laser scanner 500 and its controller to a power source is common knowledge. The controller contains corresponding software. The 3D laser scanner 500 consists of a laser emitter, laser receiver, time counter, motor-controlled rotatable filter, control circuit board, microcomputer, CCD sensor, and software. Utilizing the principle of laser ranging, it records the 3D coordinates, reflectivity, and texture information of a large number of points on the measured object's shape, quickly reconstructing the 3D model of the measured object and various data such as lines, surfaces, and volumes in the controller's software.

[0044] A method for measuring the volume of timber on a vehicle includes steps for loading timber into the vehicle, three-dimensional scanning and modeling, and model data reading and calculation.

[0045] Loading timber into the vehicle, refer to Figure 1 and Figure 7 The timber truck 900 drives into the traffic lane 200 in a front-to-back direction, and the timber on the timber truck 900 extends in a left-to-right direction.

[0046] 3D scanning and modeling: 3D laser scanners 500 on both sides of the 200-meter driveway scan the timber piles on the 900-meter-long timber truck, for reference. Figure 7 At least one 3D laser scanner 500 is positioned above the timber pile and scans it. The controller, based on the contour points measured by the 3D laser scanner 500, recreates the timber pile in the software's 3D coordinate system, thus obtaining a simulation model of the timber pile in the software's 3D coordinate system. This invention acquires the contour information of both ends of the timber pile, as well as the contour information of the top of the timber pile.

[0047] Reference Figure 8 Model data reading and calculation: Based on the left and right outlines of the timber stack model, the cross-sectional area of ​​the left end of each timber is read. and the cross-sectional area of ​​the right end , the cross-sectional area of ​​the left end and the cross-sectional area of ​​the right end The average of the two is established as the cross-sectional area of ​​the wood. The average length of the multiple logs displayed on the upper surface of the timber stack model is established as the length value of each log. Based on the cross-sectional area of ​​each piece of wood and length value Calculate the volume of each type of timber. The total number of cubic meters of all timber The summation is the total volume of timber carried in the vehicle. , the cross-sectional area of each piece of wood Comparison qualified value To determine whether the wood is qualified, that is, the shaft diameter of each piece of wood Reach the qualified value To determine whether the wood is qualified, for example, the shaft diameter of the wood is qualified; the sum of the cubic meters of all qualified woods is , calculate the proportion of qualified woods in this train , when the proportion of qualified woods When it is, it is determined that the woods in this train can be purchased. For example, when the proportion of qualified woods reaches 50%, it is determined that the woods in this train can be purchased.

[0048] Compared with the prior art, the beneficial effects of the present application include: automatically obtaining the information of the wood pile, accurately judging whether each piece of wood and the wood pile as a whole are qualified, improving the acquisition efficiency, and giving a more accurate and reasonable evaluation of whether to buy or not to the wood supplier; each piece of wood has been entered into the controller, and it is also more convenient to form an information database that summarizes all the woods in the factory area, which is convenient for production follow-up.

[0049] The contour color of the wood end face is darker than the annual ring line of the wood, and the wood contour is determined according to the color degree of each line of the model. ​​​​​​​​​​​​​​​​​​​

[0054] Reference Figure 1 and Figure 7 In some embodiments of the present invention, when the timber pile is high, it is difficult to simultaneously acquire information about the sides and top of the timber pile when only a three-dimensional laser scanner 500 higher than the timber pile is provided; the column 400 is provided with multiple three-dimensional laser scanners 500 distributed at intervals along the vertical direction.

[0055] Reference Figure 1 and Figure 4 In some embodiments of the present invention, the track 100 is supported by a plurality of ground-mounting supports 600, which are spaced apart in the front-to-back direction. Each ground-mounting support 600 includes a horizontal plate 610 and at least two vertical posts 620 spaced apart in the left-to-right direction. The at least two vertical posts 620 jointly support the horizontal plate 610, and the track 100 is supported on the horizontal plate 610. Vehicle-mounted timber measuring devices are generally installed on the ground to accommodate vehicle traffic; the present invention elevates the track 100 and sliding components 300, with their lower surfaces off the ground, to prevent the track 100 and sliding components 300 from being soaked by rainwater.

[0056] Reference Figure 3 In some embodiments of the present invention, two of the plurality of grounding brackets 600 are provided with baffles 710, and a proximity switch 720 is provided on the slide table 310. The proximity switch 720 is electrically connected to the controller. When the proximity switch 720 detects the baffles 710, the slide table 310 moves forward or backward into position.

[0057] Reference Figures 1 to 4 In some embodiments of the present invention, the column 400 is a square column, and the four side walls of the column 400 are provided with vertically extending T-shaped snap-fit ​​grooves 410. The 3D laser scanner 500 is connected to the T-shaped snap-fit ​​grooves 410 by bolts. The lower end of the column 400 is connected to the slide table 310 through the T-shaped snap-fit ​​grooves 410 and the angle steel. The column 400 does not require additional drilling of multiple mounting holes at different heights, and the 3D laser scanner 500 can be flexibly installed at different heights; the lower end of the column 400 can also be easily connected to the upper angle steel. In some embodiments, the 3D laser scanner 500 is connected to the column 400 by a mounting plate; specifically, the nut of the bolt is adapted to snap into the T-shaped snap-fit ​​groove 410, and the bolt passes through the mounting plate and is then locked with the corresponding nut. The mounting plate is adapted to install the 3D laser scanner 500.

[0058] Reference Figure 2 and Figure 3The displacement power structure 320 may include a traveling rack 321, a traveling gear 322, and a traveling motor 323. The traveling rack 321 extends in the front-to-back direction and is mounted on the ground support 600. The traveling motor 323 is mounted on the slide table 310. The traveling gear 322 is connected to the rotating shaft of the traveling motor 323 and meshes with the traveling rack 321.

[0059] The displacement power structure 320 may also include a traveling motor 323, a toothed belt, and at least two pulleys. The two ends of the toothed belt are respectively wound around the corresponding pulleys. The pulleys and the traveling motor 323 are both mounted on the corresponding ground support 600, and at least one pulley is connected to the traveling motor 323. The slide 310 is connected to a point on the toothed belt, and the toothed belt drives the slide 310 to move back and forth in the front and back direction.

[0060] Reference Figure 2 , Figure 5 and Figure 6 In some embodiments of the present invention, a mounting plate 810 is connected to the lower end of the slide 310. A thrust bearing 830 is held between the shoulder of the rotating shaft of the traveling gear 322 and a locking nut 820. The mounting plate 810 supports the locking nut 820 via the thrust bearing 830; that is, the mounting plate 810 supports the outer ring of the thrust bearing 830. The outer ring supports the inner ring via rollers within the thrust bearing 830. The inner ring supports the locking nut 820. The locking nut 820 is threadedly connected to the rotating shaft of the traveling gear 322. The rotating shaft of the traveling motor 323 passes through the slide 310 and is connected to the rotating shaft of the traveling gear 322 via a coupling 840. The thrust bearing 830 is a conventional design, suitable for both rolling connections between inner and outer rings and for applying large axial forces between the inner and outer rings. The present invention combines a thrust bearing 830 and a locking nut 820 to connect the traveling gear 322 below the slide table 310 and the traveling motor 323 above the slide table 310, and the traveling motor 323 does not need to pull the traveling gear 322 upward.

[0061] Even better, the locking nut 820 is also connected to the shaft of the traveling gear 322 via a set screw.

[0062] Reference Figure 5 and Figure 6 In some embodiments of the present invention, the mounting plate 810 is connected to an end cap 850, which covers the thrust bearing 830 and, together with the mounting plate 810, clamps the outer ring of the thrust bearing 830.

[0063] In some embodiments of the present invention, an anti-interference sunshade is also included. The track 100, the sliding assembly 300, and the 3D laser scanner 500 are all housed within the anti-interference sunshade, which is also suitable for rain protection. In this invention, the anti-interference sunshade isolates sunlight, preventing bright sunlight from shining directly onto the timber pile and preventing sunlight from obscuring the outline of the timber pile.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of the technical solutions of the present invention.

Claims

1. A method for measuring the volume of timber on a vehicle, characterized in that, Includes the following steps: The timber is loaded into the vehicle, and the timber vehicle (900) drives into the driving lane (200) in the front-to-back direction, with the timber on the timber vehicle (900) extending in the left-to-right direction; Three-dimensional scanning and modeling: Three-dimensional laser scanners (500) on the left and right sides of the driving channel (200) scan the timber pile on the timber truck (900). At least one three-dimensional laser scanner (500) is higher than the timber pile and scans the timber pile. The controller replicates the timber pile in the three-dimensional coordinate system of the software according to the contour points measured by the three-dimensional laser scanner (500). A simulation model is obtained in the three-dimensional coordinate system of the software. Model data reading and calculation: Based on the left and right outlines of the timber stack model, read the cross-sectional area of ​​the left end of each timber. and the cross-sectional area of ​​the right end , the cross-sectional area of ​​the left end and the cross-sectional area of ​​the right end The average of the two is established as the cross-sectional area of ​​the wood. The average length of the multiple logs displayed on the upper surface of the timber stack model is established as the length value of each log. , Based on the cross-sectional area of ​​each piece of wood and length value Calculate the volume of each type of timber. The total number of cubic meters of all timber The summation is the total volume of timber carried in the vehicle. , Cross-sectional area of ​​each piece of wood Comparison of qualified values To determine whether a piece of timber is qualified, the sum of the cubic meters of all qualified timber is: Calculate the percentage of qualified timber in this train trip. When the proportion of qualified timber At that time, it was determined that the timber for this train could be purchased; The model's end face has several closed loops, with a degree of roundness. The closed loop is defined as the cross-section of the wood, and the other closed loops are defined as the void cross-section; In the aforementioned 3D scanning and modeling steps, the forward and backward directions correspond to the X-axis of the software's 3D coordinate system, the left and right directions correspond to the Y-axis of the software's 3D coordinate system, and the up and down directions correspond to the Z-axis of the software's 3D coordinate system. The overlap of the projections of a left-end section and a right-end section onto the Y-axis is also considered. At that time, it was determined that the left end section and the right end section belonged to the same type of timber.

2. The method for measuring the volume of timber on a vehicle according to claim 1, characterized in that, The outline of the wood end face is darker than the annual rings of the wood, and the outline of the wood is determined according to the color of each line of the model.

3. The method for measuring the volume of timber on a vehicle according to claim 1, characterized in that, In the three-dimensional scanning and modeling steps, when the wood-carrying cart (900) is long, the slide (310) drives the three-dimensional laser scanner (500) to move in the front-back direction.

4. The method for measuring the volume of timber on a vehicle according to claim 1, characterized in that, It also includes an entry verification step, in which the robotic arm transfers the timber from the timber truck (900) to the ground of the storage site in batches, or the timber truck (900) dumps the timber onto the ground of the storage site. If the inspection staff finds timber with large curvature or short filler timber, the timber of that batch is discarded.

5. The method for measuring the volume of timber on a vehicle according to claim 3, characterized in that, The traveling rack (321) extends in the front-to-back direction and is mounted on the ground support (600). The traveling motor (323) is mounted on the slide (310). The traveling gear (322) is connected to the shaft of the traveling motor (323) and meshes with the traveling rack (321).

6. The method for measuring the volume of timber on a vehicle according to claim 5, characterized in that, The lower end of the slide (310) is connected to a mounting plate (810). The shoulder of the rotating shaft of the traveling gear (322) is clamped with a locking nut (820) to hold a thrust bearing (830). The mounting plate (810) supports the locking nut (820) through the thrust bearing (830). The rotating shaft of the traveling motor (323) passes through the slide (310) and is connected to the rotating shaft of the traveling gear (322) through a coupling (840). The traveling motor (323) is adapted to drive the slide to move back and forth along the track.

7. The method for measuring the volume of timber on a vehicle according to claim 6, characterized in that, The mounting plate (810) is connected to an end cap (850), which covers the thrust bearing (830) and, together with the mounting plate (810), clamps the outer ring of the thrust bearing (830).

8. The method for measuring the volume of timber on a vehicle according to any one of claims 5 to 7, characterized in that, It also includes an anti-interference sunshade, in which the track, the vehicle passage and the 3D laser scanner (500) are all installed, and the anti-interference sunshade is also suitable for rain protection.

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