Detection line, detection system, and method for sorting lumber for compacted wood or compacted wood based on moisture content.

Abstract

The detection line can continuously and rapidly measure the thickness, weight, length, width, and moisture content of timber or compacted wood, resulting in high sorting efficiency and significantly improving production efficiency. The present invention provides a detection line, detection system, and detection method for sorting timber or compacted wood based on moisture content. [Solution] The rack includes a first measuring section 1 that transports the wooden board along the radial direction and a second measuring section 2 that is attached to the downstream end and transports the wooden board along the axial direction. A first thickness measuring mechanism and a width measuring mechanism are provided on the rack corresponding to the first chain-type conveyor belt 10 of the first measuring section. A length measuring mechanism and a second thickness measuring mechanism are provided at the downstream end of the roller-type conveyor belt 20 of the second measuring section. The first thickness measuring mechanism and the second thickness measuring mechanism include a lifting-type clamping roller module and a thickness measuring instrument. The width measuring mechanism and the length measuring mechanism use encoders attached to the drive motor of the conveyor belt. When the thickness measuring instrument receives a measurement signal, it starts measuring the width or length of the wooden board.

Description

Technical Field

[0001] The present invention relates to the field of wooden board detection and sorting equipment, and specifically to a detection line, a detection system and a method for sorting densified wood materials or densified wood based on moisture content.

Background Art

[0002] Moisture content is an important index for manufacturing densified wood (also called compressed wood). Especially for densified wood manufactured by high-frequency (high-frequency) technology, too high or too low moisture content not only significantly affects the physical properties and processing performance of densified wood, but also has a great impact on the safety and controllability of the densification process.

[0003] High-frequency compressed timber production lines generally include preheating equipment, high-frequency hot presses, cooling equipment, etc., and some patents relate to moisture content measuring equipment. Patent Document 1 (May 28, 2019) discloses a moisture content measuring unit 8 (Figures 7 and 8) located upstream of a high-frequency compressed timber production line, in which a microwave emission end 830 is provided at the bottom of a measuring holder 84, and a microwave receiving end 831 is provided on the transport chain of a measuring segment 80, and the measuring holder 84 is moved horizontally and vertically by a moving mechanism, and the moisture content measuring unit 8 can directly remove timber 1 with a moisture content that does not meet the standards from the production line. However, when detecting lumber 1 of different lengths, the operator needs to move the measuring holder 84 in the length direction using the moving mechanism, and when detecting lumber 1 of different widths, the operator needs to move the measuring holder 84 in the vertical direction using the moving mechanism. Therefore, this patent cannot continuously supply a large quantity of lumber of different lengths or widths at high speed, and there are also limitations to the range of lengths and widths of lumber that can be detected by moving the measuring holder 84. Patent Document 2 (2020.05.16) discloses a moisture content measuring meter 77 (Figure 10) located downstream of a high-frequency compressed lumber production line, which measures the moisture content of compressed lumber cured in a rotating holder and issues an alarm if the moisture content is not within a preset range. The rotating holder in this patent is necessarily unable to continuously supply and discharge a large quantity of lumber of different lengths or widths at high speed, and is also unsuitable for sorting. Furthermore, the size of the lumber receiving plate 740 is limited, and the redundancy of lumber sizes that each unit can process is small. Patent Document 3 (2023.09.01) discloses a physical property detection system for compressed wood manufacturing material located upstream of a high-frequency compressed wood production line (Figures 4 and 5), which can measure the moisture content of the compressed wood manufacturing material transported to the transport line 10. The carrier rack 30 is attached to the corresponding ends of two guide arms 103 of the first transport mechanism 101 in the transport line 10, and the carrier rack 30 includes two support segments 31 and two connecting segments 32 provided between the two support segments 31, with the vertical spacing between the two connecting segments 32 being adjustable.Since the spacing between the upper and lower parts of the two connecting sections 32 is adjustable, the redundancy of the thickness size of the timber being processed is increased, and since the carrier rack 30 is directly attached to the conveying line, the patent is also suitable for detecting the moisture content of timber of a predetermined length and width.

[0004] The above-mentioned moisture content measuring device cannot meet the application requirements for continuously and rapidly sorting large quantities of timber (logs) of different lengths and widths. Nor can it meet the application requirements for continuously and rapidly sorting compressed timber (finished products) with different moisture content. For example, when compressed timber is used to further join pieces together, it is necessary to distinguish moisture content more precisely. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Chinese Patent Publication Number CN109808013A [Patent Document 2] Chinese Patent Publication Number CN111196407A [Patent Document 3] Chinese Patent Publication Number CN219625395U [Overview of the project] [Problems that the invention aims to solve]

[0006] The objective of the present invention is to solve the problems present in the prior art described above, and the present invention provides a detection line, detection system, and detection method for sorting timber for compacted wood or compacted wood based on moisture content. [Means for solving the problem]

[0007] This invention is realized through the following technical solutions. A detection line for sorting lumber for compacted wood or compacted wood based on moisture content, comprising a rack, the rack comprising a first measuring unit that sets the transport direction along the radial direction of the wood board and a second measuring unit attached to the downstream end of the first measuring unit and setting the transport direction along the axial direction of the wood board, The first measuring section has several sets of first chain-type conveyor belts mounted parallel to each other along the axial direction of the wooden board, and a first thickness measuring mechanism and a width measuring mechanism are provided on a first measuring work station on a rack corresponding to the first chain-type conveyor belt, and the second measuring section includes a roller-type conveyor belt, and a length measuring mechanism and a second thickness measuring mechanism are provided at the downstream end of the roller-type conveyor belt. The first and second thickness measuring mechanisms include a lifting clamping roller module and a thickness measuring instrument provided on the lifting clamping roller module, respectively. The width measuring mechanism and length measuring mechanism both use encoders attached to drive motors corresponding to the conveyor belt. When the thickness measuring instrument receives a measurement signal, the encoder begins measuring the width or length of the wooden board, and when the thickness measuring instrument stops receiving the measurement signal, the encoder stops measuring.

[0008] Preferably, the lifting clamping roller module includes a fixed shaft attached to the side frame of the conveyor belt, a connecting block movably attached to the fixed shaft, a roller shaft connected to the connecting block and extending outward above the conveyor belt, and a clamping roller fitted to the outer end of the roller shaft, wherein the upper or lower end of the connecting block is connected to the side frame of the conveyor belt by an elastic connecting member, the height from the lower surface of the clamping roller to the upper surface of the conveyor belt is less than the thickness of the wooden board, and the thickness measuring instrument is a displacement sensor attached to the upper or lower end of the fixed shaft.

[0009] Preferably, a moisture content measuring mechanism is provided at a second measuring work station on a rack corresponding to the first chain-type conveyor belt, and the second measuring work station is located upstream of the first measuring work station. A weight measuring mechanism is provided at a third measuring work station on a rack corresponding to the first chain-type conveyor belt, and the third measuring work station is located upstream of the second measuring work station. A stopper is provided at the downstream end of the third measuring work station.

[0010] Preferably, the moisture content measuring mechanism includes several microwave moisture content measuring devices provided between adjacent first chain-type conveyor belts, the microwave moisture content measuring devices include a microwave emitting antenna provided on the upper side of the first chain-type conveyor belt and a microwave receiving end provided on the lower side of the first chain-type conveyor belt, and the weight measuring mechanism is a weighing scale mounted between adjacent first chain-type conveyor belts using a lifting chassis.

[0011] Preferably, several intermediate roller belts are provided between the rollers of the roller conveyor belt of the second measuring section, the upper surfaces of the rollers of the intermediate roller belts are lower than the upper surfaces of the rollers of the roller conveyor belt, one end of the intermediate roller belt offset from the first measuring section is rotatably connected to the side frame of the roller conveyor belt, the other end extends to the downstream end of the chain conveyor belt and a diagonal rod is hinged to the lower part of this end, the other end of the diagonal rod is fixed to a rotating shaft, both ends of the rotating shaft are rotatably mounted to a rack, the rotating shaft is connected to and driven by a rotary motor, and when the rotating shaft rotates, it moves the hinged end of the diagonal rod upward, and the upper surface of the roller at the hinged end of the intermediate roller belt is not lower than the upper surface of the chain conveyor belt.

[0012] Preferably, the number of first chain-type conveyor belts is five, arranged on the side of the second measuring section corresponding to the direction from downstream to upstream of the second measuring section, and including a first conveyor chain, a second conveyor chain, a third conveyor chain, a fourth conveyor chain, and a fifth conveyor chain in that order, with the distance between the first and second conveyor chains being 280 mm, the distance between the second and third conveyor chains being 560 mm, the distance between the third and fourth conveyor chains being 840 mm, and the distance between the fourth and fifth conveyor chains being 840 mm.

[0013] Preferably, a material cutting section is provided upstream of the first chain-type conveyor belt, the material cutting section includes a second chain-type conveyor belt and a material cutting machine, the downstream end of the second chain-type conveyor belt is attached to the upstream end of the first chain-type conveyor belt, and the material cutting machine is a material cutting roller attached to both sides of the second chain-type conveyor belt. The conveyor belt corresponding to the second chain-type conveyor belt downstream of the second measuring section is located outside the horizontal line where the first conveyor chain is located, an adjustment work station is provided upstream of the first chain-type conveyor belt, a stopper is provided at the downstream end of the adjustment work station, a pad is provided on the outer edge of the first chain-type conveyor belt corresponding to the adjustment work station, a pusher is attached to the pad, the pusher includes a push hand that extends and retracts toward the inside of the conveyor belt, and the push hand, in its retracted position, is located outside the horizontal line where the second chain-type conveyor belt is located.

[0014] Preferably, the rack further includes a sorting section for rejected items, which is attached to the downstream end of the second measuring section and sets the transport direction along the axial direction of the wooden board, and a sorting section for accepted items, which is attached to the downstream end of the sorting section for rejected items and sets the transport direction along the axial direction of the wooden board. Roller conveyor belts are attached to both the sorting section for rejected items and the sorting section for accepted items, a third chain-type conveyor belt for outputting rejected items is provided on one side of the sorting section for rejected items, and a fourth chain-type conveyor belt for outputting accepted items is provided on one side of the sorting section for accepted items.

[0015] A second aspect of the present invention discloses a detection system for sorting timber for compacted wood or compacted wood based on the moisture content of the above detection line, comprising a measurement module, a control module connected to the measurement module, a data processing module connected to the measurement module, and a storage module. The aforementioned measurement module is A microwave moisture content measurement unit is installed and positioned at multiple locations along the axial direction of the wooden board for detection, A weight measurement unit arranged to measure the weight of the wooden board by a lifting scale A width measurement unit that arranges an encoder attached to the first chain-type conveyor belt drive motor and measures the width while performing the first thickness measurement when the wooden board is conveyed in the radial direction A length measurement unit that arranges an encoder attached to the roller-type conveyor belt drive motor and measures the length while performing the second thickness measurement when the wooden board is conveyed in the axial direction A thickness measurement unit including lifting clamping rollers arranged on the first chain-type conveyor belt and the roller-type conveyor belt respectively, and a displacement sensor provided on the clamping roller side to measure the height of the clamping roller The control module A start / stop unit of the measurement module that arranges a photoelectric sensor in the moisture content measurement unit and the weight measurement unit using microwaves, starts when detecting the presence of a template, and stops when there is no wooden board A stopper unit that arranges a photoelectric sensor or a pressure sensor in the stoppers of the adjustment work station and the third measurement work station respectively to detect whether a wooden board is present, performs adjustment measurement of the corresponding work station when present, closes the stopper, and opens the stopper after the wooden board has been moved A start / stop unit of the conveyor belt that arranges photoelectric sensors at the ends of the conveyor belt and each work station to detect whether a wooden board is present, starts the conveyance when present, and stops the conveyance when not present The storage module is arranged to encode each wooden board and store the corresponding measured moisture content, thickness, length, width, and volume data The data processing module A volume calculation unit arranged to calculate the volume of the corresponding wooden board based on the measured thickness, length, and width of the wooden board It includes a moisture content calculation unit that obtains the specific gravity of the wooden board based on the volume and weight of the wooden board, combines it with the average value of the moisture content of the wooden board detected by microwaves, and calculates the moisture content of the wooden board

[0016] The third aspect of the present invention discloses a detection method for selecting densified wood materials or densified wood based on the moisture content, Step S1 of measuring the weight of the wooden board, Step S2 of measuring the moisture content of a plurality of measurement points on the wooden board and calculating the average value of the moisture content, Step S3 of measuring the thickness of each position along the radial direction of the wooden board with a first thickness measuring mechanism and measuring the width using an encoder when the wooden board passes through the position of the first thickness measuring mechanism, Step S4 of measuring the thickness of each position along the axial direction of the wooden board with a second thickness measuring mechanism, combining the thicknesses of Step S2 to calculate the average value, and measuring the length using an encoder when the wooden board passes through the position of the second thickness measuring mechanism, Step S5 of calculating the volume of the wooden board using the numerical values of the length, width, and thickness in Steps S3 - S5, Step S6 of obtaining the specific gravity of the wooden board based on the volume and weight of the wooden board, combining and calculating it with the average value of the moisture content in Step S2, and calculating the corrected moisture content of the wooden board.

Advantages of the Invention

[0017] Compared with the prior art, the beneficial effects of the present invention include the following.

[0018] 1. The detection line of the present invention realizes the thickness measurement of each part of the wooden board by radial conveyance and axial conveyance in sequence, ensuring the accuracy of the measured thickness numerical values. On the other hand, the thickness measuring mechanism uses lifting clamping rollers to measure the thickness while starting the encoder to measure the corresponding numerical values of the running width side and length side, without the need for temporary stops for measurement, ensuring that multi - data is measured while ensuring that the wooden board flows at high speed, and realizing continuous and high - speed measurement of the wooden board.

[0019] 2. The detection line of the present invention integrates high - speed and comprehensive measurement of thickness, weight, length, width, and moisture content, ensuring the accuracy of the measurement data. Further, it provides support for the important data in correcting the moisture content data measured based on the specific gravity of the wooden board, improving the accuracy of the moisture content data.

[0020] 3. The detection line of the present invention can continuously and rapidly measure the thickness, weight, length, width, and moisture content of large quantities of timber or compacted timber of different sizes and weights, thereby improving sorting efficiency and significantly increasing production efficiency. By measuring the total volume of a lot, the supplier's timber can be directly accessed to the high-frequency compacted timber production line, and timber can be procured from the timber supplier based on the total volume of timber that meets the moisture content standards, thereby reducing or eliminating the need for timber storage space in the factory.

[0021] 4. The detection line of the present invention also continuously and rapidly measures and marks the volume and moisture content of a single material, providing data such as moisture content and volume to subsequent processes such as high-frequency hot pressing in the production line of high-frequency compressed timber, and further allowing the high-frequency hot pressing parameters to be adjusted individually for a single material in these subsequent processes. It is very suitable for continuously and rapidly sorting compressed timber (finished product) with different moisture contents and for further manufacturing laterally joined boards from the compressed timber, where the difference in moisture content between two pieces of compressed timber before joining is too large, making joining difficult. [Brief explanation of the drawing]

[0022] [Figure 1] This is a schematic diagram of the structure of the first embodiment of a detection line for sorting lumber for compacted wood or compacted wood based on moisture content. [Figure 2] This is a schematic diagram of the structure of the first embodiment of the thickness measuring mechanism. [Figure 3] This is a schematic diagram of the structure of a second embodiment of a detection line for sorting lumber for compacted wood or compacted wood based on moisture content. [Figure 4] This is a schematic diagram of the structure of the second embodiment of the thickness measuring mechanism. [Figure 5] This is a schematic diagram of the structure of a relay roll belt. [Figure 6] This is a schematic diagram of the structure of a third embodiment of a detection line for sorting lumber for compacted wood or compacted wood based on moisture content. [Figure 7]This is a schematic diagram of the structure of the fourth embodiment of a detection line for sorting lumber for compacted wood or compacted wood based on moisture content. [Figure 8] This is a schematic diagram of the structure of the fifth embodiment of a detection line for sorting lumber for compacted wood or compacted wood based on moisture content. [Figure 9] This is a schematic diagram of a detection system for sorting lumber for compaction or compaction wood based on moisture content. [Modes for carrying out the invention]

[0023] The detection line for sorting lumber for compacted wood or compacted wood based on moisture content according to the present invention is not limited to high-frequency compaction production lines, but can also be used in steam compaction production lines, artificial board production lines, and for example, in dense boards, particle boards, glued laminated wood, laminated wood, etc.

[0024] In several embodiments, the detection line for sorting compacted timber based on moisture content according to the present invention is located upstream of the high-frequency compacted timber production line, and it can be located in the same or a different workspace spatially as the high-frequency compacted timber production lines of other segments downstream, and the sorted timber can be transported to the downstream line by automatic or semi-automatic conveying equipment. In some embodiments, the production line for sorting timber for compacted timber based on moisture content according to the present invention is located upstream of the sequential laying high-frequency compaction production line.

[0025] In several embodiments, the detection line for sorting compacted wood based on moisture content of the present invention is located downstream of the high-frequency compacted wood production line, and it can be located in the same or a different workspace as the high-frequency compacted wood production lines of other segments upstream.

[0026] The detection line for sorting based on moisture content according to the present invention can also be placed midway through the production line of high-frequency compressed timber, depending on different processes or demands; in other words, the production line for sorting timber for high-frequency compressed timber based on moisture content according to the present invention is not limited to being placed upstream or downstream of the production line.

[0027] In this invention, the term "timber" refers to raw timber planks obtained after pretreatment such as sawing and drying.

[0028] In this invention, the term "compressed wood" refers to a wooden board that has a higher density compared to a raw timber board obtained after the wood material has undergone treatments such as preheating, hot pressing, and cooling.

[0029] The detection line for sorting timber or compacted wood based on moisture content according to the present invention solves a variety of technical problems, and different technical problems can be solved based on different prior art based on the technical solutions, technical means and technical features disclosed in the present invention. The present invention will be described in more detail below with reference to the drawings.

[0030] Figure 1 shows a detection line for sorting lumber for compacted wood or compacted wood based on moisture content, and includes a rack, the rack including a first measuring unit 1 that sets the transport direction along the radial direction of the wood board and a second measuring unit 2 attached to the downstream end of the first measuring unit 1 and setting the transport direction along the axial direction of the wood board. In this invention, the radial direction and axial direction are currently interpreted as the radial and axial directions of the wood board.

[0031] The first measuring section has several sets of first chain-type conveyor belts 10 mounted parallel to each other along the axial direction of the wooden board, and a liftable clamping roller module and a width measuring mechanism are provided on a first measuring work station 11 on a rack corresponding to the first chain-type conveyor belts 10. The second measuring section 2 includes a roller-type conveyor belt 20, and a length measuring mechanism and a liftable clamping roller module are provided at the downstream end of the roller-type conveyor belt 20. Both the width measuring mechanism and the length measuring mechanism use encoders (not shown) attached to drive motors corresponding to the conveyor belts. As shown in Figure 2, the liftable clamping roller module uses a vertically movable roller shaft 102 attached to the side of the conveyor belt and clamping rollers 103 attached to the roller shaft, and the roller shaft employs passive lifting movement, fixing one end of the roller shaft by, for example, a return spring. The height from the lower surface of the clamping roller 103 to the upper surface of the conveyor belt is not greater than the thickness of the wooden board, and when the wooden board passes over the clamping rollers, the width measuring mechanism and the length measuring mechanism begin to measure the width or length of the wooden board. Furthermore, to better sense whether or not the wooden board reaches the measurement work station, a photoelectric sensor may be attached to the corresponding measurement work station, and a pressure sensor may be attached to the clamping roller. This structure enables measurement of width and length by positioning the wooden board with the clamping roller and rapidly changing its radial and axial direction along the same detection line, thereby enabling high-speed and continuous measurement of a large number of wooden boards.

[0032] The technical solution shown in Figure 1 further enables multi-parameter detection in the detection line, and a moisture content measuring mechanism 19 is provided at a second measuring work station 15 on a rack corresponding to the first chain-type conveyor belt 10, the second measuring work station 15 is located upstream of the first measuring work station 11, and a weight measuring mechanism 17 and a thickness measuring mechanism are provided at a third measuring work station 16 on a rack corresponding to the first chain-type conveyor belt 10, the third measuring work station 16 is located upstream of the second measuring work station 15, and a stopper 18 is provided at the downstream end of the third measuring work station 16, that is, the third measuring work station 16 is a temporary measurement work station, the weight measuring mechanism 17 uses a lifting weighing scale, and the thickness measuring instrument can use technologies such as laser thickness measurement and microwave thickness measurement.

[0033] Based on the above clamping structure, the thickness measuring mechanism can be implemented by providing it in a temporary measuring work station, and in another preferred technical solution, the thickness measuring mechanism is provided in a lifting clamping module. In the detection line of the preferred solution shown in Figure 3, the first measuring section 1 has several sets of first chain-type conveyor belts 10 mounted in parallel along the axial direction of the wooden board, and a first thickness measuring mechanism 12 and a width measuring mechanism are provided on a first measuring work station 11 on a rack corresponding to the first chain-type conveyor belts 10, and the second measuring section 2 includes a roller-type conveyor belt 20, and a length measuring mechanism and a second thickness measuring mechanism 22 are provided at the downstream end of the roller-type conveyor belt 20.

[0034] As shown in Figure 3, the first thickness measuring mechanism 12 and the second thickness measuring mechanism 22 include a lifting type clamping roller module provided above the conveyor belt and a thickness measuring instrument provided on the lifting type clamping roller module. Both the width measuring mechanism and the length measuring mechanism use encoders attached to drive motors corresponding to the conveyor belt. When the thickness measuring instrument (not shown) receives a measurement signal, the encoder starts measuring the width or length of the wooden board, and when the thickness measuring instrument stops receiving the measurement signal, the encoder stops measuring.

[0035] The detection line ensures that the thickness of each part of the wooden board is measured by sequential radial and axial transport, guaranteeing the accuracy of the measured thickness values. Meanwhile, the thickness measurement mechanism uses a lifting clamping roller to measure the thickness and simultaneously activates an encoder to measure the corresponding width and length values ​​of the traveling side. The thickness of the entire wooden board is measured in contact, but there is no need to pause for measurement. Multi-data is measured while ensuring that the wooden board moves at high speed, thereby enabling continuous and high-speed measurement of the wooden board.

[0036] Furthermore, the rack of the present invention is provided with corresponding holders and support legs based on the structure of the conveyor belt, and for example, a frame for attaching the conveyor belt is provided, and the structure of each part is provided based on the actual conditions of the conveyor belt.

[0037] Furthermore, the lifting clamping roller module of the thickness measuring mechanism of the present invention ensures that the thickness of the wooden board is measured while it is being transported, and the equipment can be improved based on the clamping roller structure. In one example, as shown in Figure 4, the lifting clamping roller module includes a fixed shaft 100 attached to the side frame of the conveyor belt, a connecting block 101 movably attached to the fixed shaft 100, a roller shaft 102 connected to the connecting block 101 and extending outward to the top of the conveyor belt, and a clamping roller 103 fitted to the outer end of the roller shaft 102, the upper or lower end of the connecting block 101 being connected to the side frame of the conveyor belt by an elastic connecting member 104, the elastic connecting member may use a return spring, the height from the bottom surface of the clamping roller 103 to the top surface of the conveyor belt being less than the thickness of the wooden board, and the thickness measuring instrument is a displacement sensor 105 attached to the upper or lower end of the fixed shaft 100, which calculates the thickness of the wooden board by detecting changes in the rotational axis displacement. In this example, the connecting block 101 is housed within the fixed shaft 100 of the tubular structure, a chute 106 is opened along the longitudinal direction on one side of the fixed shaft, the elastic connecting member 104 is housed in the internal top end of the fixed shaft 100 and its bottom is connected to the connecting block 101, and the displacement sensor 105 is attached to the bottom of the pipe inside the fixed shaft 100. Naturally, based on this principle, the connecting block may also be provided as a ring structure externally fitted to the fixed shaft, and the elastic connecting member and displacement sensor may be provided externally to achieve passive lifting and lowering in the same manner. During use, the displacement sensor inspects the position change of the clamping roller, detects the thickness of the wooden board based on the displacement distance of the clamping roller, the first thickness measuring mechanism measures the thickness of the width side of the wooden board, and the second thickness measuring mechanism measures the thickness of the length side of the wooden board, allowing inspection of the flatness of the wooden board. Furthermore, the average thickness of the wooden board can be calculated after data processing, ensuring the accuracy of the subsequent moisture content calculation.

[0038] The detection line of the present invention further includes moisture content detection, and as shown in Figure 3, a moisture content measuring mechanism 19 is provided at a second measuring work station 15 on a rack corresponding to the first chain-type conveyor belt 10, the second measuring work station 15 is located upstream of the first measuring work station 11, a weight measuring mechanism 17 is provided at a third measuring work station 16 on a rack corresponding to the first chain-type conveyor belt 10, the third measuring work station 16 is located upstream of the second measuring work station 15, and a stopper 18 is provided at the downstream end of the third measuring work station 16. The thickness measuring instrument can use technologies such as laser thickness measurement and microwave thickness measurement.

[0039] The moisture content measuring mechanism 19 includes several microwave moisture content measuring devices 86 installed between adjacent first chain-type conveyor belts 10, each microwave moisture content measuring device 86 including a microwave emitting antenna installed on the upper side of the first chain-type conveyor belt 10 and a microwave receiving end installed on the lower side of the first chain-type conveyor belt 10, and the weight measuring mechanism 17 is a weighing scale mounted between adjacent first chain-type conveyor belts 10 using a lifting chassis.

[0040] The moisture content measuring mechanism of the present invention detects the moisture content of a wooden board using the microwave method. When the wooden board passes through the microwave moisture content measuring device in the radial direction, the device rapidly acquires moisture content data from multiple measurement points in the radial direction of the wooden board, calculates the average value for the multiple measurements, and uses this as the moisture content of the corresponding wooden board (average moisture content). The principle of detecting the moisture content of a wooden board using the microwave method is as follows: In the microwave frequency band, the dielectric constant of water is much larger than that of general materials, and the water dipole frequently reverses, consuming a large amount of electrical energy. Therefore, when microwaves pass through a semi-finished product with a high moisture content, the microwave energy loss due to moisture is much larger than the loss due to other dry materials, and the moisture content of the semi-finished product significantly affects its dielectric constant. By measuring the attenuation of microwave energy, the moisture content of the wooden board can be estimated. During the scanning process, microwaves are incident perpendicularly to the surface of the material being measured. If the moisture content of the material being measured is greater than that of a completely dry test material, significant changes occur in the basic parameters of the transmitted wave, such as amplitude and phase, thereby enabling the quantitative detection of the moisture content of the wooden board. According to the description of the prior art, the moisture content measuring device includes a microwave emitting end and a microwave receiving end, and also includes a detection program that activates the device when a photoelectric sensor detects the wooden board. This belongs to the prior art of this field and will not be specifically described here.

[0041] While microwave moisture meter readings correlate well with the actual moisture content of the object being measured, the moisture content (%) is affected by changes in the specific gravity of the object being measured, and the measurement accuracy decreases for wooden boards with inconsistent specific gravity. This invention, in addition to directly detecting and obtaining the moisture content of a wooden board, further corrects the moisture content using a method that "detects the average value of the moisture content based on collection correction." This method refers to the calculation method in Japanese Patent Application P2001-124707A (May 11, 2001), and the final moisture content η = W s / (ω-W s ) × 100 (%), and ω = W1 / S, (where η represents the water content, W s ω indicates the moisture content of the standard volume (SK) of each wooden board, ω indicates the specific gravity of the wooden board, and W 1ω represents the total weight, and S represents the volume. As is clear from this formula, the moisture content η of a wooden board is calculated from the moisture content WS per standard volume of the wooden board and the specific gravity ω. For wooden boards with varying specific gravities, this method allows for the determination of the moisture content η with high measurement accuracy. Based on this principle, the present invention redesigns the wooden board detection line and sets up a continuous and high-speed measurement function for large quantities of timber or compacted wood, and includes measurement of the wooden board volume and data processing, that is, high-speed and accurate measurement of the thickness, length, and width of the wooden board. The volume is obtained by calculating the product of the thickness, width, and length, and volume is an abbreviation for "wooden board volume".

[0042] For the encoder attached to the drive motor of the first chain-type conveyor belt, the wooden board travels along its radial direction, so the encoder is used to measure its width. For the encoder attached to the drive motor of the roller-type conveyor belt, the wooden board travels along its axial direction, so the encoder is used to measure its length. The encoder can be selected from manufacturers including OMRON. The encoder is a rotary sensor that converts the position and displacement physical quantities of a rotating member into a series of digital pulse signals. The encoder uses a grating and an infrared light source, and a receiver converts the optical signal into a TTL (HTL) electrical signal. By analyzing the TTL level frequency and the number of high-level signals, the encoder intuitively reflects the rotation angle and rotation position of the motor. The encoder serves as an information acquisition element for the motor's operating state, and connecting it to the motor by a mechanical mounting method is a conventional method. The encoder of the present invention measures and calculates the length and width of the wooden board by detecting the rotation angle of the drive motor.

[0043] To further improve high-speed measurement in a flow line of a large number of wooden boards, the radial transport of the wooden boards is converted to axial transport and measurement is performed twice. The present invention provides intermediate roller belts to ensure that the wooden boards do not stop during the intermediate process, and a specific example is as follows. As shown in Figure 5, several intermediate roller belts 200 are provided between the rollers of the roller-type conveyor belt 20 of the second measuring section 2, the upper surface of the rollers of the intermediate roller belts 200 is lower than the upper surface of the rollers of the roller-type conveyor belt 20, one end of the intermediate roller belt 200 offset from the first measuring section 1 is rotatably connected to the side frame of the roller-type conveyor belt 20, the other end extends to the downstream end of the chain-type conveyor belt 10 and a diagonal rod 201 is hinged to the lower part of the end, and the other end of the diagonal rod 201 is fixed to a rotating shaft 202, and the rotating shaft 202 Both ends of the rotating shaft 202 are rotatably attached to the rack of the corresponding conveyor belt, and the rotating shaft 202 is connected to and driven by a rotary motor. When the rotating shaft 202 rotates, the hinged end of the oblique rod 201 is moved upward, and the upper surface of the roller at the hinged end of the intermediate roller belt 200 is not lower than the upper surface of the chain-type conveyor belt 10. As a result, the chain-type conveyor belt relays the wooden boards to the intermediate roller belt, and further conveys them from the intermediate roller belt to the roller-type conveyor belt. Once the conveyance is complete, the roller-type conveyor belt is activated to transport the wooden boards in the axial direction.

[0044] The detection line of the present invention has high production efficiency and can continuously and rapidly sort timber or compacted timber of different lengths and widths to improve sorting efficiency. In the corresponding technical solution, as shown in Figure 3, the number of first chain-type conveyor belts is set to 5, and they are arranged on the side of the second measuring section corresponding to the direction from downstream to upstream of the second measuring section, and include, in order, a first conveyor chain, a second conveyor chain, a third conveyor chain, a fourth conveyor chain and a fifth conveyor chain, with the distance between the first and second conveyor chains being 280 mm, the distance between the second and third conveyor chains being 560 mm, the distance between the third and fourth conveyor chains being 840 mm, and the distance between the fourth and fifth conveyor chains being 840 mm. The outer end of the intermediate roller belt downstream of the first chain-type conveyor belt is positioned on the side of the downstream end of the corresponding conveyor chain, so that the number of intermediate roller belts corresponds to the first chain-type conveyor belt, or is slightly increased or decreased as needed. Naturally, the number of conveying belts and the number of belts on the intermediate rollers in this invention can both be increased or decreased according to the actual condition of the wooden boards, making it adaptable to a wider range of scenarios.

[0045] In a specific example, if the length of the board is 600 mm, there are 2 conveyor chains and 2 intermediate roller belts. If the length of the board is greater than 600 mm and less than 1120 mm (560 mm + 560 mm) (it may also be 1000 mm (160 mm + 260 mm + 560 mm), and the corresponding parameters are adjusted, which will not be explained here), there are 3 conveyor chains and 2 intermediate roller belts. If the length of the board is 1120 mm or more and less than 1680 mm, there are 3 conveyor chains and 3 intermediate roller belts. If the length of the board is 1680 mm or more and less than 2520 mm, there are 4 conveyor chains and 4 intermediate roller belts. If the length of the board is 2520 mm or more and 3000 mm or less, there are 4 conveyor chains and 5 intermediate roller belts.

[0046] Furthermore, as can be seen from the above solution, the microwave moisture content measuring device is installed between adjacent first chain-type conveyor belts 10. In a specific example, the microwave moisture content measuring device includes four devices, which are, from left to right, microwave moisture content measuring device 86-1, microwave moisture content measuring device 86-2, microwave moisture content measuring device, and microwave moisture content measuring device 86-4. As shown in Figure 1, in the first chain-type conveyor, from left to right are the first conveyor chain, second conveyor chain, third conveyor chain, fourth conveyor chain, and fifth conveyor chain, and in the intermediate roller belt, from left to right are intermediate roller belt 1, intermediate roller belt 2, intermediate roller belt 3, intermediate roller belt 4, and intermediate roller belt 5, respectively.

[0047] For boards smaller than 600 mm in length (critical value, pre-set according to production conditions), the microwave moisture content meter antenna 86 is positioned so that none of them are activated (manually or automatically).

[0048] The microwave moisture content measuring device 86-1 is positioned to activate on a plate equal to 600 mm (spanning the first and second conveyor chains, and also spanning the intermediate roller belt 1 and intermediate roller belt 2).

[0049] For a plate that is longer than 600 mm and shorter than 1120 mm (560 mm + 560 mm) (spanning the first, second, and third conveyor chains, and also spanning the intermediate roller belt 1 and intermediate roller belt 2), the microwave moisture content measuring equipment 86-1 and microwave moisture content measuring equipment 86-2 are arranged to be activated.

[0050] For a plate with a length of 1120 mm or more and less than 1680 mm (560 mm + 560 mm + 560 mm) (spanning the first conveyor chain, second conveyor chain, and third conveyor chain, and also spanning the intermediate roller belt 1, intermediate roller belt 2, and intermediate roller belt 3), the microwave moisture content measuring equipment 86-1, microwave moisture content measuring equipment 86-2, and microwave moisture content measuring equipment 86-3 are arranged to be activated.

[0051] If the length is 1680mm or more and 3000mm or less (spanning the first conveyor chain, second conveyor chain, third conveyor chain, and fourth conveyor chain, and also spanning the intermediate roller belt 1, intermediate roller belt 2, intermediate roller belt 3, and intermediate roller belt 4).

[0052] If the length is 2520mm (560mm + 560mm + 560mm + 840mm) or more and 3000mm or less, the relay roller belts 1, 2, 3, 4, and 5 are straddled, and the microwave moisture content measuring equipment 86-1, 86-2, 86-3, and 86-4 are arranged to be activated.

[0053] The weighing mechanism 17 in the detection line of the present invention is a weighing scale installed between adjacent conveyor belts of the first chain-type conveyor belt 10, and is used to measure the weight of a wooden board. The bottom of the weighing scale is fixed by a lifting chassis, and when the wooden board reaches the tray position of the weighing scale, the lifting chassis rises, detaching the wooden board from the first chain-type conveyor belt 10 and weighing it. When actually installing it, the weight measuring device 17 is installed between the second conveyor chains, and naturally, multiple weight measuring mechanisms are installed on multiple conveyor chains to achieve stable weight measurement.

[0054] The stopper of the present invention is a rotating or lifting structure with baffles. Specifically, multiple baffles are provided on the same rod body, and as shown in number 18 in Figure 3, the baffles are provided correspondingly between adjacent conveyor belts. When it is necessary to stop a wooden board, the baffles are stopped in front of the conveyor position by a rotating or lifting mechanism, and when it is not necessary to stop the board, the baffles are moved away from the conveyor position by a rotating or lifting mechanism.

[0055] In the solution shown in Figure 6, a material cutting section 3 is provided upstream of the first chain-type conveyor belt 10, and the material cutting section 3 includes a second chain-type conveyor belt 30 and a material cutting machine 31, the downstream end of the second chain-type conveyor belt 30 is attached to the upstream end of the first chain-type conveyor belt 10, and the material cutting machine 31 is a material cutting roller attached to both sides of the second chain-type conveyor belt 30.

[0056] One side of the conveying chain of the second chain-type conveying belt 30 is located outside the horizontal line on which the first chain-type conveying belt 10 is located. As shown in Figure 6, the left side of the conveying chain of the second chain-type conveying belt 30 is located outside the horizontal line on the left side of the first chain-type conveying belt 10, and there is space for the wooden board to move to a reference position to the right when it is conveyed from the second chain-type conveying belt 30 to the first chain-type conveying belt 10. Specifically, an adjustment work station 111 is provided upstream of the first chain-type conveying belt 10, a stopper 18-1 is provided downstream of the adjustment work station 111, a pad 112 is provided on the outer edge (left side in the figure) of the first chain-type conveying belt 10 corresponding to the adjustment work station 111, a pusher 113 is attached to the pad 112, the pusher 113 includes a push hand 114 that extends and retracts toward the inside of the conveying belt, and the push hand 114 is located outside the horizontal line on which the second chain-type conveying belt 30 is located when in its contracted position. Wooden boards (600mm to 3000mm) are pushed to the target position by a pusher, ensuring accurate measurement of wooden boards within the specified range. After being pushed a certain distance by a pusher installed on that side, wooden boards of any length are always moved to a standard work station.

[0057] The operation flow is as follows: The wooden board is transported from the second chain-type conveyor belt 30 to the first chain-type conveyor belt 10 and then continues to be transported until it reaches the adjustment work station and is stopped by a stopper. At this point, the first chain-type conveyor belt 10 stops running. At this stage, a lifting tray is provided between the conveyor belts to lift the wooden board higher than the conveyor belts, and the push hand 114 of the pusher pushes the wooden board to the target position. During the subsequent transport process of the wooden board, measurements can be taken at the precise measurement work station. After the wooden board is adjusted to the predetermined position, the lifting tray descends and drops the wooden board onto the conveyor belt, the stopper rotates and opens, and the first chain-type conveyor belt restarts and continues transporting.

[0058] The above adjustment work station allows any length of wooden board to be self-adjusted to the measuring work station, simplifying the pre-processing steps. Naturally, other technical solutions can be used in addition to the above adjustment work station structure, and in another improved example, as shown in Figure 7, an adjustment work station is provided upstream of the first chain-type conveyor belt 10, a stopper is provided at the downstream end of the adjustment work station, a stopper pad 116 is provided on the left side of the first chain-type conveyor belt 10 corresponding to the adjustment work station to align with the left side of the measuring work station, a pusher 113-1 is provided on the other side corresponding to the adjustment work station, the pusher 113-1 includes a push hand 114-1 that extends and retracts toward the inside of the conveyor belt, and wood After the board is transported onto the first chain-type conveyor belt 10, it is stopped by a stopper when it reaches the adjustment work station, at which point the first chain-type conveyor belt 10 stops running. At this stage, a lifting tray is provided between the conveyor belts to lift the wooden board higher than the conveyor belts, and the push hand 114-1 of the pusher pushes the wooden board onto the stopper pad 116, allowing each measurement to be performed at the precise measurement work station during the subsequent transport process of the wooden board. After the wooden board is adjusted to the predetermined position, the lifting tray descends and drops the wooden board onto the conveyor belt, the stopper rotates and opens, and the first chain-type conveyor belt restarts and continues transporting.

[0059] In yet another improved example of the present invention, as shown in Figure 8, the rack further includes a sorting section 40 for rejected items, which is attached to the downstream end of the second measuring section 20 and sets the transport direction along the axial direction of the wooden board, and a sorting section 50 for accepted items, which is attached to the downstream end of the sorting section 40 for rejected items and sets the transport direction along the axial direction of the wooden board. Roller conveyor belts are attached to both the sorting section 40 for rejected items and the sorting section 50 for accepted items. A third chain-type conveyor belt 41 that outputs rejected items is provided on one side of the sorting section 40, and a fourth chain-type conveyor belt 51 that outputs accepted items is provided on one side of the sorting section 50. Naturally, the wooden board needs to change angle when it is transferred from the sorting section to the chain-type conveyor belt. For this reason, it is necessary to provide an intermediate roller belt on the roller conveyor belt of the sorting section, and the structure of the intermediate roller belt is the same as the structure provided on the second measuring section, so its explanation is omitted here. Lifting shutters 43 and 53 are provided at the downstream ends of the roller conveyor belts in the NG product sorting section 40 and the OK product sorting section 50. Based on the current measurement information of the wooden boards, it is determined whether the wooden boards are NG or OK products, and a baffle corresponding to the conveyor belt is driven to raise and stop the boards, allowing them to be transferred to the corresponding optional conveyor belt.

[0060] This invention enables the continuous and high-speed sorting of large quantities of timber or compacted wood of different lengths and widths based on the average moisture content of the wood boards. The average moisture content is either the average of the measured moisture content or the average of the detected moisture content based on volume correction. The purpose of continuous and high-speed sorting is to improve the overall production efficiency and product quality of the high-frequency compacted wood production line.

[0061] This invention allows for the continuous and high-speed measurement of moisture content, weight, thickness, width, and length of large quantities of timber or compacted wood, significantly improving production efficiency. It also improves sorting efficiency by continuously and high-speed sorting of timber or compacted wood with different lengths and widths. Furthermore, by measuring the total volume of a lot, it allows suppliers to directly access the high-frequency compacted wood production line with their timber. Timber suppliers can be procured based on the total volume of timber that meets the moisture content standards, reducing or eliminating the need for timber storage space in the factory.

[0062] To improve product quality, by continuously and rapidly measuring and marking the volume and moisture content of individual materials, data such as moisture content and volume is provided to subsequent processes such as high-frequency hot pressing in the high-frequency compressed lumber production line. Furthermore, in these subsequent processes, high-frequency hot pressing parameters (high frequency, heating time and interval time, dielectric constant, compression ratio, compression time and interval time, etc.) can be individually adjusted for individual materials. On the other hand, it is also very suitable for continuously and rapidly sorting compressed lumber (finished products) with different moisture contents and further manufacturing laterally joined boards from compressed lumber, as the difference in moisture content between two pieces of compressed lumber before joining is too large, making joining difficult.

[0063] An example of a second aspect of the present invention provides a detection system for sorting timber for compacted wood or compacted wood based on moisture content based on the detection line described above, and as shown in Figure 9, includes a measuring module, a control module connected to the measuring module, a data processing module connected to the measuring module, and a storage module. Each module is provided according to the function realized by the detection line structure described above.

[0064] The aforementioned measurement module is A microwave moisture content measurement unit is installed and positioned at multiple locations along the axial direction of the wooden board for detection, A weight measuring unit positioned to measure the weight of a wooden board using a lifting scale, An encoder is mounted on a first chain-type conveyor belt drive motor, and a width measuring unit is positioned to perform a first thickness measurement and simultaneously measure the width when the wooden board is conveyed radially. An encoder is mounted on a roller-type conveyor belt drive motor, and a length measuring unit is positioned to perform a second thickness measurement and simultaneously measure the length when the wooden board is conveyed in the axial direction. The system includes a thickness measuring unit that includes a lifting clamping roller positioned on a first chain-type conveyor belt and a roller-type conveyor belt, and a displacement sensor provided on the clamping roller side for measuring the height of the clamping roller, The control module is The microwave-based moisture content measurement unit and weight measurement unit are equipped with photoelectric sensors to activate when a template is detected and deactivate the measurement module when the wooden board is not present. A stopper unit is provided which a photoelectric sensor or pressure sensor is placed on the stopper of the adjustment work station and the third measurement work station, respectively, to detect whether or not a wooden board is present, and when it is present, performs adjustment measurement at the corresponding work station, closes the stopper, and opens the stopper after the wooden board has moved. The system includes a conveyor belt start / stop unit that uses photoelectric sensors placed at the ends of the conveyor belt and at each work station to detect whether or not a wooden board is present, starts conveying when a board is present, and stops conveying when a board is not present, The memory module is arranged to store data on the moisture content, thickness, length, width, and volume of each wooden board, which are encoded and measured accordingly. The aforementioned data processing module is A volume calculation unit is positioned to calculate the volume of a corresponding wooden board based on the measured thickness, length, and width of the wooden board. The system includes a moisture content calculation unit that determines the specific gravity of the wooden board based on its volume and weight, and calculates the moisture content of the wooden board by combining this with the average value of the moisture content of the wooden board detected by microwaves.

[0065] An example of a third aspect of the present invention discloses a detection method for selecting lumber for compacted wood or compacted wood based on moisture content. Step S1 involves measuring the weight of the wooden board, Step S2 involves measuring the moisture content at multiple measurement points on a wooden board and calculating the average value of the moisture content. Step S3 involves measuring the thickness at each position along the radial direction of the wooden board using the first thickness measuring mechanism, and measuring the width using an encoder when the wooden board passes the position of the first thickness measuring mechanism. Step S4 involves measuring the thickness at each position along the axial direction of the wooden board using the second thickness measuring mechanism, combining the thicknesses from step S2 to calculate the average value, and measuring the length using an encoder when the wooden board passes the position of the second thickness measuring mechanism. Step S5 calculates the volume of the wooden board using the length, width, and thickness values ​​from steps S3-S5. Step S6 includes calculating the corrected moisture content of the wooden board by determining the specific gravity of the wooden board based on its volume and weight, and combining it with the average moisture content from step S2.

[0066] For the specific correction algorithm for the moisture content of the wooden board, please refer to the calculation method in Japanese Patent Application P2001-124707A (May 11, 2001), where the final moisture content η = W s / (ω-W s ) × 100 (%), and ω = W1 / S, where η represents the water content, W s ω indicates the moisture content of the standard volume (SK) of each wooden board, ω indicates the specific gravity of the wooden board, and W 1 The value indicates the total weight, and S indicates the volume. This invention investigates a detection line that enables continuous and high-speed measurement of a large number of wooden boards, and corrects the moisture content using the detection data from the detection line.

[0067] The above-described technical solution is merely one embodiment of the present invention, and those skilled in the art can easily make various improvements or modifications after the disclosure of the principle of the present invention. The present invention is not limited to the technical solution described in the above-described specific embodiment, and therefore the previously described examples are merely preferred and not limiting in meaning.

Claims

1. The rack includes a first measuring unit that sets the transport direction along the radial direction of the wooden board and a second measuring unit that is attached to the downstream end of the first measuring unit and sets the transport direction along the axial direction of the wooden board. The first measuring section has several sets of first chain-type conveyor belts mounted parallel to each other along the axial direction of the wooden board, and a first thickness measuring mechanism and a width measuring mechanism are provided on a first measuring work station on a rack corresponding to the first chain-type conveyor belt, and the second measuring section includes a roller-type conveyor belt, and a length measuring mechanism and a second thickness measuring mechanism are provided at the downstream end of the roller-type conveyor belt. The first and second thickness measuring mechanisms include a lifting clamping roller module and a thickness measuring instrument provided on the lifting clamping roller module, and both the width measuring mechanism and the length measuring mechanism use encoders attached to drive motors corresponding to the conveyor belt. When the thickness measuring instrument receives a measurement signal, the encoder starts measuring the width or length of the wooden board, and when the thickness measuring instrument stops receiving the measurement signal, the encoder stops measuring. A detection line for sorting lumber for compacted wood or compacted wood based on its moisture content, characterized by the following features.

2. The liftable clamping roller module includes a fixed shaft attached to the side frame of the conveyor belt, a connecting block movably attached to the fixed shaft, a roller shaft connected to the connecting block and extending outward above the conveyor belt, and a clamping roller fitted to the outer end of the roller shaft, wherein the upper or lower end of the connecting block is connected to the side frame of the conveyor belt by an elastic connecting member, the height from the lower surface of the clamping roller to the upper surface of the conveyor belt is less than the thickness of the wooden board, and the thickness measuring instrument is a displacement sensor attached to the upper or lower end of the fixed shaft. A detection line for sorting lumber for compacted wood or compacted wood based on the moisture content described in claim 1.

3. A moisture content measuring mechanism is provided at a second measuring work station on a rack corresponding to the first chain-type conveyor belt, and the second measuring work station is located upstream of the first measuring work station. A weight measuring mechanism is provided at a third measuring work station on a rack corresponding to the first chain-type conveyor belt, and the third measuring work station is located upstream of the second measuring work station. A stopper is provided at the downstream end of the third measuring work station. A detection line for sorting lumber for compacted wood or compacted wood based on the moisture content described in claim 1.

4. The moisture content measuring mechanism includes several microwave moisture content measuring devices installed between adjacent first chain-type conveyor belts, each microwave moisture content measuring device including a microwave emitting antenna installed on the upper side of the first chain-type conveyor belt and a microwave receiving end installed on the lower side of the first chain-type conveyor belt, and the weight measuring mechanism is a weighing scale mounted between adjacent first chain-type conveyor belts using a lifting chassis. A detection line for sorting lumber for compacted wood or compacted wood based on the moisture content described in claim 3.

5. Several intermediate roller belts are provided between the rollers of the roller conveyor belt of the second measuring section, the upper surfaces of the rollers of the intermediate roller belts are lower than the upper surfaces of the rollers of the roller conveyor belt, one end of the intermediate roller belt offset from the first measuring section is rotatably connected to the side frame of the roller conveyor belt, the other end extends to the downstream end of the chain conveyor belt and a diagonal rod is hinged to the lower part of this end, the other end of the diagonal rod is fixed to a rotating shaft, both ends of the rotating shaft are rotatably mounted on a rack, the rotating shaft is connected to and driven by a rotary motor, and when the rotating shaft rotates, the hinged end of the diagonal rod moves upward, and the upper surface of the roller at the hinged end of the intermediate roller belt is not lower than the upper surface of the chain conveyor belt A detection line for sorting lumber for compacted wood or compacted wood based on the moisture content described in claim 1.

6. The first chain-type conveyor belt consists of five belts, arranged along the side of the second measuring section in a direction from downstream to upstream, and includes, in order, a first conveyor chain, a second conveyor chain, a third conveyor chain, a fourth conveyor chain, and a fifth conveyor chain. The distance between the first and second conveyor chains is 280 mm, the distance between the second and third conveyor chains is 560 mm, the distance between the third and fourth conveyor chains is 840 mm, and the distance between the fourth and fifth conveyor chains is 840 mm. A detection line for sorting lumber for compacted wood or compacted wood based on the moisture content described in claim 1.

7. A material cutting section is provided upstream of the first chain-type conveyor belt, the material cutting section includes a second chain-type conveyor belt and a material cutting machine, the downstream end of the second chain-type conveyor belt is attached to the upstream end of the first chain-type conveyor belt, and the material cutting machine is a material cutting roller attached to both sides of the second chain-type conveyor belt. The conveyor belt corresponding to the second chain-type conveyor belt downstream of the second measuring section is located outside the horizontal line where the first conveyor chain is located, an adjustment work station is provided upstream of the first chain-type conveyor belt, a stopper is provided at the downstream end of the adjustment work station, a pad is provided on the outer edge of the first chain-type conveyor belt corresponding to the adjustment work station, a pusher is attached to the pad, the pusher includes a push hand that extends and retracts toward the inside of the conveyor belt, and the push hand, in its retracted position, is located outside the horizontal line where the second chain-type conveyor belt is located. A detection line for sorting lumber for compacted wood or compacted wood based on the moisture content described in claim 6.

8. The rack further includes a sorting section for NG products, which is attached to the downstream end of the second measuring section and sets the transport direction along the axial direction of the wooden board, and a sorting section for OK products, which is attached to the downstream end of the sorting section for NG products and sets the transport direction along the axial direction of the wooden board. Roller conveying belts are attached to both the sorting section for NG products and the sorting section for OK products. A third chain-type conveying belt that outputs NG products is provided on one side of the sorting section for NG products, and a fourth chain-type conveying belt that outputs OK products is provided on one side of the sorting section for OK products. A detection line for sorting lumber for compacted wood or compacted wood based on the moisture content described in claim 1.

9. Includes a measuring module, a control module connected to the measuring module, a data processing module and a storage module connected to the measuring module, The aforementioned measurement module is A microwave moisture content measurement unit is installed and positioned at multiple locations along the axial direction of the wooden board for detection, A weight measuring unit positioned to measure the weight of a wooden board using a lifting scale, An encoder is mounted on a first chain-type conveyor belt drive motor, and a width measuring unit is provided to perform a first thickness measurement and simultaneously measure the width when conveying the wooden board radially. An encoder is mounted on a roller-type conveyor belt drive motor, and a length measuring unit is positioned to perform a second thickness measurement and simultaneously measure the length when the wooden board is conveyed in the axial direction. The system includes a thickness measuring unit that includes a lifting clamping roller positioned on a first chain-type conveyor belt and a roller-type conveyor belt, and a displacement sensor provided on the clamping roller side for measuring the height of the clamping roller, The control module is The microwave-based moisture content measurement unit and weight measurement unit are equipped with photoelectric sensors to activate when a template is detected and deactivate the measurement module when the wooden board is not present. A stopper unit is provided which a photoelectric sensor or pressure sensor is placed on the stopper of the adjustment work station and the third measurement work station, respectively, to detect whether or not a wooden board is present, and when it is present, performs adjustment measurement at the corresponding work station, closes the stopper, and opens the stopper after the wooden board has moved. The system includes a conveyor belt start / stop unit that uses photoelectric sensors placed at the ends of the conveyor belt and at each work station to detect whether or not a wooden board is present, starts conveying when a board is present, and stops conveying when a board is not present, The memory module is arranged to store data on the moisture content, thickness, length, width, and volume of each wooden board, which are encoded and measured accordingly. The aforementioned data processing module is A volume calculation unit is positioned to calculate the volume of a corresponding wooden board based on the measured thickness, length, and width of the wooden board. Includes a moisture content calculation unit that determines the specific gravity of the wooden board based on the volume and weight of the wooden board, and calculates the moisture content of the wooden board by combining this with the average value of the moisture content of the wooden board detected by microwave. A detection system for sorting lumber for compacted wood or compacted wood based on the moisture content applied to the detection line described in claim 3.

10. Step S1 involves measuring the weight of the wooden board, Step S2 involves measuring the moisture content at multiple measurement points on a wooden board and calculating the average value of the moisture content. Step S3 involves measuring the thickness at each position along the radial direction of the wooden board using the first thickness measuring mechanism, and measuring the width using an encoder when the wooden board passes the position of the first thickness measuring mechanism. Step S4 involves measuring the thickness at each position along the axial direction of the wooden board using the second thickness measuring mechanism, combining the thicknesses from step S2 to calculate the average value, and measuring the length using an encoder when the wooden board passes the position of the second thickness measuring mechanism. Step S5 calculates the volume of the wooden board using the length, width, and thickness values ​​from steps S3-S5. Step S6 includes calculating the corrected moisture content of the wooden board by determining the specific gravity of the wooden board based on its volume and weight, and combining it with the average moisture content from step S2. A detection method for selecting lumber for compacted wood or compacted wood based on the moisture content applied to the detection system described in claim 9.

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