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

Abstract

The invention relates to a detection line for sorting compacted wood timber or compacted wood based on moisture content, which comprises a rack, and the rack comprises a first measuring part arranged in the transmission direction along the radial direction of a wood board and a second measuring part connected with the downstream end of the first measuring part and arranged in the transmission direction along the axial direction of the wood board; the first measuring part is provided with a plurality of groups of first chain type conveying belts, and the first chain type conveying belts are provided with a first thickness measuring mechanism and a width measuring mechanism corresponding to the rack; the second measuring part comprises a roller type conveying belt, and a length measuring mechanism and a second thickness measuring mechanism are arranged at the downstream end of the roller type conveying belt; the first thickness measuring mechanism and the second thickness measuring mechanism comprise lifting type clamping roller assemblies and thickness measuring devices. The width measuring mechanism and the length measuring mechanism both adopt encoders installed on a driving motor of the conveying belt. When the thickness measurer receives a measurement signal, the encoder begins to measure the width or the length. According to the detection line, the thickness, the weight, the length, the width and the water content of large-batch wood or compacted wood can be continuously and rapidly measured; the sorting efficiency is high and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of wood board detection and sorting equipment, and in particular to a detection line, a detection system and a method for sorting wood for compacting or compacting wood based on moisture content. Background Art

[0002] Moisture content is an important indicator for the preparation of compacted wood (also known as compressed wood), especially for compacted wood prepared using high-frequency (high-frequency) technology. Too high or too low moisture content not only has a significant impact on the physical properties and processing properties of the compacted wood, but also has a great impact on the safety and controllability of the compaction process.

[0003] The high-frequency compression wood production line generally includes preheating equipment, high-frequency hot press, cooling equipment, etc. Some patents involve moisture content measuring equipment. CN 109808013 A (2019.05.28) discloses a moisture content measuring section 8 located upstream of the high-frequency compression wood production line, a microwave transmitting end 830 is arranged at the bottom of the measuring bracket 84, and a microwave receiving end 831 is arranged on the transmission link of the measuring section 80. The measuring bracket 84 is moved horizontally and vertically by a moving mechanism. The moisture content measuring section 8 can directly remove the wood 1 with unqualified moisture content from the production line. However, since when detecting wood 1 of different lengths, the operator needs to move the measuring bracket 84 in the length direction through a moving mechanism, and when detecting wood 1 of different widths, the operator needs to move the measuring bracket 84 in the vertical direction through a moving mechanism, the patent cannot continuously and quickly load large quantities of wood of different lengths or widths. In addition, even if the moving measuring bracket 84 is used, the length range and width range of the wood that can be detected are limited. CN 111196407 A (2020.05.16) discloses a moisture content meter 77 located downstream of a high-frequency compacted wood production line, which can measure the moisture content of compacted wood cured on a rotating bracket and sound an alarm when the moisture content is not within a preset range. The rotating bracket of the patent is inevitably unable to continuously and quickly load and unload large quantities of wood of different lengths or widths and is therefore not suitable for sorting, and due to the size limitation of the wood holding plate 740, the redundancy of the wood size that can be processed by each device is also small. CN 219625395 U (2023.09.01) discloses a physical property detection system for compacted wood preparation materials located upstream of a high-frequency compacted wood production line, which can measure the moisture content of compacted wood preparation materials transmitted on a conveyor line 10. A carrier 30 is installed on the corresponding ends of two guide arms 103 of a first conveying mechanism 101 in the conveyor line 10. The carrier 30 includes two support sections 31 and two connecting sections 32 arranged between the two support sections 31, and the spacing between the two connecting sections 32 is adjustable. Since the spacing between the two connecting sections 32 is adjustable, the thickness dimension redundancy of the processed wood is increased, but since the carrier 30 is directly installed on the conveyor line, the patent is also suitable for moisture content detection of wood of fixed length and width.

[0004] On the one hand, the above-mentioned moisture content measuring equipment cannot meet the application scenario of continuously and quickly sorting large batches of wood (logs) of different lengths and widths. On the other hand, the above-mentioned moisture content measuring equipment cannot meet the application scenario of continuously and quickly sorting compressed wood (finished products) with different moisture contents, such as when the compressed wood is used for further splicing, it is necessary to more strictly distinguish the moisture content. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art. The present invention provides a detection line, a detection system and a detection method for sorting compressed wood or compressed wood based on moisture content.

[0006] The present invention is achieved through the following technical solutions:

[0007] A testing line for sorting wood for compacting wood or compacting wood based on moisture content, comprising a frame, the frame comprising a first measuring part arranged along the radial direction of the wood board in a transmission direction, and a second measuring part connected to the downstream end of the first measuring part and arranged along the axial direction of the wood board in a transmission direction;

[0008] The first measuring part is provided with a plurality of first chain conveyor belts parallel to the axial direction of the wooden board, and the first chain conveyor belt is provided with a first thickness measuring mechanism and a width measuring mechanism corresponding to the first measuring station on the frame; the second measuring part comprises a roller conveyor belt, and the downstream end of the roller conveyor belt is provided with a length measuring mechanism and a second thickness measuring mechanism;

[0009] The first thickness measuring mechanism and the second thickness measuring mechanism include a lifting clamping roller assembly arranged above the conveyor belt and a thickness measuring device arranged on the lifting clamping roller assembly. The width measuring mechanism and the length measuring mechanism both use an encoder installed on the driving motor of the corresponding conveyor belt. When the thickness measuring device receives a measurement signal, the encoder starts to measure the width or length of the wooden board. When the thickness measuring device stops receiving the measurement signal, the encoder stops measuring.

[0010] Preferably, the lifting clamping roller assembly includes a fixed shaft installed on the side frame of the conveyor belt, a connecting block movably installed on the fixed shaft, a roller shaft connected to the connecting block and extending outward to above the conveyor belt, and a clamping roller sleeved on the outer end of the roller shaft, the upper end or the lower end of the connecting block is connected to the side frame of the conveyor belt through an elastic connecting piece, 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; the thickness measuring device is a displacement sensor installed on the upper end or the lower end of the fixed shaft.

[0011] Preferably, the second measuring station on the frame corresponding to the first chain conveyor belt is provided with a moisture content measuring mechanism, and the second measuring station is located upstream of the first measuring station; the third measuring station on the frame corresponding to the first chain conveyor belt is provided with a weight measuring mechanism, and the third measuring station is located upstream of the second measuring station, and a stopper is provided at the downstream end of the third measuring station.

[0012] Preferably, the moisture content measuring mechanism includes a plurality of microwave moisture content measuring devices arranged between adjacent first chain conveyor belts, and the microwave moisture content measuring devices include a microwave transmitting antenna arranged on the upper side of the first chain conveyor belt and a microwave receiving end arranged on the lower side of the first chain conveyor belt; the weight measuring mechanism is a weighing machine installed between adjacent first chain conveyor belts using a lifting chassis.

[0013] Preferably, a plurality of transfer roller belts are arranged between the rollers of the roller conveyor belt of the second measuring part, and the upper surface of the roller of the transfer roller belt is lower than the upper surface of the roller of the roller conveyor belt; one end of the transfer roller belt deviating from the first measuring part is rotatably connected to the side frame of the roller conveyor belt, and the other end extends to the downstream end of the chain conveyor belt and is hinged with an inclined rod at the lower part of the end, and the other end of the inclined rod is fixed to a rotating shaft, and both ends of the rotating shaft are rotatably installed on the frame, and the rotating shaft is connected to a rotating motor for driving; when the rotating shaft rotates, it drives the hinged end of the inclined rod to move upward, and the upper surface of the roller of the hinged end of the transfer roller belt is not lower than the upper surface of the chain conveyor belt.

[0014] Preferably, the number of the first chain conveyor belts is five, which are arranged on the side of the second measuring part corresponding to the direction from downstream to upstream of the second measuring part, and include the first conveyor chain, the second conveyor chain, the third conveyor chain, the fourth conveyor chain and the fifth conveyor chain in sequence; the distance between the first conveyor chain and the second conveyor chain is 280mm, the distance between the second conveyor chain and the third conveyor chain is 560mm, the distance between the third conveyor chain and the fourth conveyor chain is 840mm, and the distance between the fourth conveyor chain and the fifth conveyor chain is 840mm.

[0015] Preferably, a cutting section is provided upstream of the first chain conveyor belt, the cutting section comprises a second chain conveyor belt and a cutting machine, the downstream of the second chain conveyor belt is connected to the upstream end of the first chain conveyor belt, and the cutting machine is a cutting roller installed on both sides of the second chain conveyor belt;

[0016] The conveyor belt of the second chain conveyor belt corresponding to the downstream side of the second measuring part is outside the horizontal line where the first conveyor chain is located; the upstream part of the first chain conveyor belt is provided with an adjustment station, and the downstream end of the adjustment station is provided with a stopper, and a pad is provided on the outer side of the first chain conveyor belt corresponding to the adjustment station, and a pusher is installed on the pad, and the pusher includes a push handle which extends toward the inner side of the conveyor belt, and the position of the push handle in the retracted state is outside the horizontal line where the second chain conveyor belt is located.

[0017] Preferably, the frame also includes an NG product sorting section connected to the downstream end of the second measuring section and with a transmission direction set along the axial direction of the wooden board, and an OK product sorting section connected to the downstream end of the NG product sorting section and with a transmission direction set along the axial direction of the wooden board; the NG product sorting section and the OK product sorting section are both equipped with roller conveyor belts, a third chain conveyor belt for outputting NG products is provided on one side of the NG product sorting section, and a fourth chain conveyor belt for outputting OK products is provided on one side of the OK product sorting section.

[0018] The second aspect of the present invention discloses a detection system for sorting wood for compacting wood or compacting wood based on moisture content based on the above detection line, comprising a measurement module, a control module connected to the measurement module, a data processing module and a storage module connected to the measurement module;

[0019] The measuring module comprises

[0020] The microwave moisture content measuring unit is arranged at multiple positions along the axial direction of the wooden board for setting and testing;

[0021] a weight measuring unit configured to measure the weight of the wooden board by means of a lifting weighing machine;

[0022] A width measuring unit is provided with an encoder installed on the first chain conveyor belt driving motor, and measures the width while performing a first thickness measurement on the wood board during radial transmission;

[0023] The length measuring unit is equipped with an encoder installed on the roller conveyor belt driving motor, which measures the length of the wood board while performing a second thickness measurement during axial transmission;

[0024] A thickness measuring unit, comprising lifting clamping rollers respectively arranged on the first chain conveyor belt and the roller conveyor belt, and a displacement sensor arranged on the side of the clamping roller to measure the height of the clamping roller;

[0025] The control module includes

[0026] The measuring module start-stop unit is configured on the microwave moisture content measuring unit and the weight measuring unit. The photoelectric sensor detects that the template exists and starts when it is detected, and stops when the wooden board does not exist.

[0027] A stopper unit is provided with a photoelectric sensor or a pressure sensor on the stoppers of the adjustment station and the third measuring station to detect whether the wooden board exists, and when the wooden board exists, the adjustment measurement of the corresponding station is performed and the stopper is closed, and the stopper is opened after the wooden board is removed;

[0028] Conveyor belt start-stop unit, photoelectric sensors are configured at the end of the conveyor belt and each workstation to detect whether there is a wooden board, and start conveying when it exists, and stop conveying when it does not exist;

[0029] The storage module is configured to encode and store data corresponding to the measured moisture content, thickness, length, width and volume of each wooden board;

[0030] The data processing module includes

[0031] A volume calculation unit, configured to calculate the volume of the corresponding wooden board according to the thickness, length and width of the measured wooden board;

[0032] The moisture content calculation unit calculates the specific gravity of the wooden board according to the volume and weight of the wooden board, and calculates the moisture content of the wooden board in combination with the average moisture content of the wooden board detected by microwaves.

[0033] The third aspect of the present invention discloses a method for detecting wood materials or compressed wood based on moisture content, comprising the following steps:

[0034] S1. Measure the weight of the board;

[0035] S2, measuring the moisture content of multiple measuring points of the wooden board, and calculating the average moisture content;

[0036] S3, using a first thickness measuring mechanism to measure the thickness of the wooden board at each position along the radial direction; when the wooden board passes the position of the first thickness measuring mechanism, using an encoder to measure the width;

[0037] S4, using a second thickness measuring mechanism to measure the thickness of the wooden board at various positions along the axial direction, and calculating an average value in combination with the thickness in step S2; when the wooden board passes the position of the second thickness measuring mechanism, using an encoder to measure the length;

[0038] S5, calculating the volume of the wooden board using the length, width and thickness values ​​obtained in steps S3-S5;

[0039] S6. Calculate the specific gravity of the wooden board according to the volume and weight of the wooden board, and calculate the corrected moisture content of the wooden board in combination with the average moisture content in step S2.

[0040] Compared with the prior art, the beneficial effects of the present invention include:

[0041] 1. On the one hand, the detection line of the present invention measures the thickness of each part of the wood board through radial transmission and axial transmission in turn, ensuring the accuracy of the measured thickness value. On the other hand, the thickness measurement mechanism uses a lifting clamping roller to measure the thickness while starting the encoder to measure the corresponding wide and long side values, without pausing for measurement, ensuring the rapid flow of the wood board while measuring multiple data, and realizing continuous and rapid measurement of the wood board.

[0042] 2. The invention can quickly and comprehensively measure the thickness, weight, length, width and moisture content of the detection line set, which not only ensures the accuracy of the measured data, but also provides important data support for the moisture content data of the wood board measured according to its specific gravity correction, thereby improving the accuracy of the moisture content data.

[0043] 3. The testing line of the present invention can realize the continuous and rapid measurement of thickness, weight, length, width and moisture content of large quantities of wood or compacted wood of different sizes and weights; it improves the sorting efficiency and greatly improves the production efficiency. The total volume of the batch is measured so that the supplier's wood can be directly connected to the high-frequency compacted wood production line. The total volume of wood with qualified moisture content is purchased from the wood supplier, which can reduce the wood storage space of the factory or eliminate the storage space.

[0044] 4. The detection line of the present invention can also provide moisture content and volume data for subsequent processes such as high-frequency hot pressing in the high-frequency compression wood production line based on continuous and rapid measurement and marking of the volume and moisture content of a single material, so that the high-frequency hot pressing parameters can be adjusted separately for a single material in these subsequent processes. Continuously and rapidly sorting compressed wood (finished products) with different moisture contents is very suitable for further preparation of horizontal spliced ​​boards with compressed wood, because the difference in moisture content between two pieces of compressed wood before splicing is too large, which is not conducive to splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The present invention is a schematic structural diagram of a first embodiment of a detection line for sorting wood materials or compressed wood based on moisture content.

[0046] Figure 2 It is a schematic structural diagram of a first implementation method of a thickness measuring mechanism;

[0047] Figure 3 This is a schematic diagram of the structure of a second implementation method of a detection line for sorting wood for compacting or compacting wood based on moisture content.

[0048] Figure 4 It is a schematic structural diagram of a second implementation method of a thickness measuring mechanism;

[0049] Figure 5 It is a schematic diagram of the structure of the transfer roller belt;

[0050] Figure 6 A schematic diagram of the structure of a third embodiment of a detection line for sorting wood for compacting or compacting wood based on moisture content;

[0051] Figure 7 A schematic diagram of the structure of a fourth embodiment of a detection line for sorting wood for compacting or compacting wood based on moisture content;

[0052] Figure 8A schematic diagram of the structure of a fifth embodiment of a detection line for sorting wood for compacting or compacting wood based on moisture content;

[0053] Fig. 9 The schematic diagram of the structure of the detection system for sorting wood for compacting or compacting wood based on moisture content. DETAILED DESCRIPTION

[0054] The moisture content-based sorting and compacting wood material or compacting wood detection line of the present invention is not limited to high-frequency compacting lines, but can also be used for steam compacting lines, artificial board lines, such as density boards, particle boards, integrated materials, laminated materials, etc.

[0055] Multiple embodiments of the detection line for sorting compressed wood based on moisture content of the present invention are placed upstream of a high-frequency compressed wood production line, and can be placed in the same workshop or different workshops with other sections of the downstream high-frequency compressed wood production line in space, and the sorted wood boards can be transported to the downstream production line by automatic or semi-automatic conveying equipment. In some embodiments, the production line for sorting compressed wood based on moisture content of the present invention is placed upstream of a progressive awakening wood high-frequency compression production line.

[0056] Multiple embodiments of the detection line for sorting compacted wood based on moisture content of the present invention are placed downstream of the high-frequency compacted wood production line, and can be placed in the same workshop or different workshops with other sections of the upstream high-frequency compacted wood production line.

[0057] The moisture content sorting detection line of the present invention can also be placed in the middle of the high-frequency compacted wood production line based on different processes or requirements, that is, the moisture content sorting line for high-frequency compacted wood materials of the present invention is not limited to being placed upstream or downstream of the production line.

[0058] The term "timber" in the present invention refers to the original wood board obtained after pre-treatment such as sawing and drying.

[0059] The term "densified wood" in the present invention refers to a wood board obtained by preheating, hot pressing, cooling and other treatments of the wood, the density of which is increased compared to the original wood board.

[0060] The technical problems solved by the detection line for sorting compressed wood or compressed wood based on moisture content of the present invention are multi-faceted. Based on the technical solutions, technical means and technical features disclosed in the present invention, different technical problems can be solved on the basis of different existing technologies. The present invention is further described in detail below in conjunction with the accompanying drawings.

[0061] Figure 1A detection line for sorting compressed wood or compressed wood based on moisture content is shown, comprising a frame, the frame comprising a first measuring part 1 arranged along the radial direction of the wood board and a second measuring part 2 connected to the downstream end of the first measuring part 1 and arranged along the axial direction of the wood board. The radial direction and axial direction in the present invention are interpreted as the radial direction and axial direction of the current wood board.

[0062] The first measuring part 1 is provided with a plurality of first chain conveyor belts 10 parallel to the axial direction of the wooden board. The first chain conveyor belt 10 is provided with a lifting clamping roller assembly and a width measuring mechanism corresponding to the first measuring station 11 on the frame. The second measuring part 2 includes a roller conveyor belt 20. The downstream end of the roller conveyor belt 20 is provided with a length measuring mechanism and a lifting clamping roller assembly. The width measuring mechanism and the length measuring mechanism both use encoders (not shown in the figure) installed on the driving motor of the corresponding conveyor belt. Figure 2 As shown, the lifting clamping roller assembly adopts a roller shaft 102 that can be lifted and lowered and installed on the side of the conveyor belt, and a clamping roller 103 installed on the roller shaft. The roller shaft adopts passive lifting and lowering movement, for example, one end of the roller shaft is fixed by 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. When the wooden board passes over the clamping roller, the width measuring mechanism and the length measuring mechanism begin to measure the width or length of the wooden board. In addition, in order to better sense whether the wooden board has reached the measuring station, a photoelectric sensor can be installed on the corresponding measuring station, and a pressure sensor can also be installed on the clamping roller. This structure realizes the measurement of width and length through the positioning of the clamping roller and the rapid radial-axial conversion of the wooden board on the same detection line, so as to realize the rapid and continuous measurement of large quantities of wooden boards.

[0063] Figure 1 In the technical solution shown, multi-parameter detection can also be realized on the detection line. The first chain conveyor belt 10 corresponds to the second measuring station 15 on the frame and is provided with a moisture content measuring mechanism 19, and the second measuring station 15 is arranged upstream of the first measuring station 11; the first chain conveyor belt 10 corresponds to the third measuring station 16 on the frame and is provided with a weight measuring mechanism 17 and a thickness measuring mechanism, and the third measuring station 16 is arranged upstream of the second measuring station 15, and a stopper 18 is provided at the downstream end of the third measuring station 16, that is, the third measuring station 16 is a paused measuring station; the weight measuring mechanism 17 adopts a lifting weighing machine, and the thickness measuring device can adopt laser thickness measurement, microwave thickness measurement and other technologies.

[0064] On the basis of the above clamping structure, the thickness measuring mechanism can be arranged in a paused measuring station, and in another preferred technical solution, the thickness measuring mechanism is arranged in a lifting clamping assembly. Figure 3In the detection line of the preferred scheme, the first measuring part 1 is provided with several groups of first chain conveyor belts 10 parallel to the axial direction of the wooden board, and the first chain conveyor belt 10 is provided with a first thickness measuring mechanism 12 and a width measuring mechanism corresponding to the first measuring station 11 on the frame; the second measuring part 2 includes a roller conveyor belt 20, and the downstream end of the roller conveyor belt 20 is provided with a length measuring mechanism and a second thickness measuring mechanism 22.

[0065] Figure 3 As shown, the first thickness measuring mechanism 12 and the second thickness measuring mechanism 22 include a lifting clamping roller assembly arranged above the conveyor belt and a thickness measuring device arranged on the lifting clamping roller assembly. The width measuring mechanism and the length measuring mechanism both use an encoder installed on the driving motor of the corresponding conveyor belt, which is not shown in the figure. When the thickness measuring device receives a measurement signal, the encoder starts to measure the width or length of the wooden board. When the thickness measuring device stops receiving the measurement signal, the encoder stops measuring.

[0066] On the one hand, the testing line measures the thickness of each part of the board through radial transmission and axial transmission in turn, ensuring the accuracy of the measured thickness value. On the other hand, the thickness measurement mechanism uses a lifting clamping roller to measure the thickness while starting the encoder to measure the corresponding wide and long side values. Although the thickness of the entire board is measured in contact, there is no need to pause for measurement, ensuring that the board can flow quickly while measuring multiple data, and realizing continuous and rapid measurement of the board.

[0067] It should be noted that the frame described in the present invention is provided with corresponding brackets and legs according to the conveyor belt structure, such as a frame for installing the conveyor belt, and the structures of each part are arranged according to the actual conveyor belt conditions.

[0068] It should also be noted that the lifting clamping roller assembly of the thickness measuring mechanism of the present invention ensures that the thickness of the wood board can be measured during the transmission process, and the equipment can be improved according to the clamping roller structure. In one example, Figure 4As shown, the lifting clamping roller assembly includes a fixed shaft 100 installed on the side frame of the conveyor belt, a connecting block 101 movably installed on 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 sleeved on the outer end of the roller shaft 102. The upper end or the lower end of the connecting block 101 is connected to the side frame of the conveyor belt through an elastic connecting member 104, and the elastic connecting member can adopt a return spring. The height from the lower surface of the clamping roller 103 to the upper surface of the conveyor belt is less than the thickness of the wooden board; the thickness measuring device is a displacement sensor 105 installed on the upper end or the lower end of the fixed shaft 100, which calculates the thickness of the wooden board by detecting the change in the displacement of the rotating shaft. In this example, the connection block 101 is built into the fixed shaft 100 of the tube structure, and a slideway 106 is provided on one side of the fixed shaft in the longitudinal direction. The elastic connector 104 is built into the top of the fixed shaft 100, and the bottom is connected to the connection block 101. The displacement sensor 105 is installed at the bottom of the fixed shaft 100. Of course, based on this principle, the connection block can also be provided with an outer ring structure connected to the fixed shaft, and the elastic connector and the displacement sensor can be placed externally, so as to achieve passive lifting. When in use, the displacement sensor detects the position change of the clamping roller, and detects the thickness of the wooden board according to the displacement distance of the clamping roller; the first thickness measuring mechanism measures the thickness of the wide side of the wooden board, and the second thickness measuring mechanism measures the thickness of the long side of the wooden board, so as to check the flatness of the wooden board, and calculate the average thickness of the wooden board after data processing, so as to ensure the accuracy of the subsequent moisture content calculation.

[0069] The detection line of the present invention further includes a moisture content detection, Figure 3 As shown, the first chain conveyor 10 is provided with a moisture content measuring mechanism 19 at the second measuring station 15 on the frame, and the second measuring station 15 is provided upstream of the first measuring station 11; the first chain conveyor 10 is provided with a weight measuring mechanism 17 at the third measuring station 16 on the frame, and the third measuring station 16 is provided upstream of the second measuring station 15, and a stopper 18 is provided at the downstream end of the third measuring station 16. The thickness measuring device can adopt laser thickness measurement, microwave thickness measurement and other technologies.

[0070] The moisture content measuring mechanism 19 includes a plurality of microwave moisture content measuring devices 86 arranged between adjacent first chain conveyor belts 10, and the microwave moisture content measuring devices 86 include a microwave transmitting antenna arranged on the upper side of the first chain conveyor belt 10 and a microwave receiving end arranged on the lower side of the first chain conveyor belt 10; the weight measuring mechanism 17 is a weighing machine installed between adjacent first chain conveyor belts 10 using a lifting chassis.

[0071] The moisture content measuring mechanism of the present invention adopts microwave method to detect the moisture content of wooden board. When the wooden board passes through the microwave moisture content measuring device in radial direction, the device quickly obtains the moisture content data of multiple measuring points in the radial direction of the wooden board, and takes multiple measuring values ​​to calculate the average value as the moisture content (average moisture content) of the corresponding wooden board. The principle of microwave method to detect the moisture content of wooden board is: in the microwave frequency band, the dielectric constant of water is much greater than that of general materials, and the frequent reversal of water dipole consumes a lot of electric energy. Therefore, when microwaves penetrate moisture-containing materials, the microwave energy loss caused by moisture is much greater than the loss caused by other dry substances. The water content in the material will significantly affect its dielectric constant. By measuring the attenuation of microwave energy, the moisture content of the wooden board can be calculated. During the scanning process, the microwave is vertically incident on the surface of the measured practice. If the moisture content of the measured piece is greater than the moisture content of the absolutely dry test piece, then the basic parameters of the transmitted wave such as amplitude and phase will change significantly, thereby realizing the quantitative detection of the moisture content of the wooden board. According to prior art records, the moisture content measuring equipment includes a microwave transmitting end and a microwave receiving end, and also includes a photoelectric sensor that starts the equipment detection program when sensing a wooden board. It belongs to the prior art in this field and will not be described in detail here.

[0072] Although the measured value of the microwave moisture meter has a high correlation with the actual moisture content of the measured object, the moisture content (%) is affected by the change in the specific gravity of the measured object. In the case of a wood board with an uncertain specific gravity, its measurement accuracy is reduced. In addition to directly detecting the moisture content of the wood board, the present invention also uses the method of "accumulating and correcting the average value of the detected moisture content" to correct the moisture content; this method refers to the calculation method of Japanese patent application P2001-124707A (2001.5.11), and the final moisture content η = W s / (ω-W s )×100(%);ω=W1 / S, where η represents the moisture content, W s represents the moisture content of the reference volume (SK) of each wooden board, ω represents the specific gravity of the wooden board, W1 represents the overall weight, and S represents the volume. It can be seen from the formula that the moisture content η of the wooden board is calculated based on the moisture content WS and the specific gravity ω of the wooden board per reference volume; for wooden boards with uncertain specific gravity, this method can be used to calculate the moisture content η with high measurement accuracy. Based on this principle, the present invention redesigns the detection line of the wooden board, and while setting up a large-scale continuous and rapid measurement function for wood or compressed wood, it also includes the measurement and data processing of the volume of the wooden board, that is, it includes the rapid and accurate measurement of the thickness, length and width of the wooden board. The volume is calculated by multiplying the aforementioned thickness, width and length, and the volume is the abbreviation of "wooden board volume".

[0073] The encoder installed on the driving motor of the first chain conveyor belt, at this time the wooden board moves along its radial direction, so the encoder is used to measure the width; the encoder installed on the driving motor of the roller conveyor belt, at this time the wooden board moves along its axial direction, so the encoder is used to measure the length. The encoder can be selected from manufacturers including OMRON encoders. The encoder is a rotary sensor that converts the position and displacement physical quantities of a rotating component into a series of digital pulse signals; the encoder uses a grating and an infrared light source to convert the optical signal into a TTL (HTL) electrical signal through a receiver, and intuitively reflects the rotation angle and rotation position of the motor by analyzing the TTL level frequency and the number of high levels. The encoder is a conventional means of connecting the motor to the motor through a mechanical installation method as an information collection element of the motor's operating status; 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.

[0074] In order to further improve the rapid measurement of large quantities of wood boards on the flow line, the radial transmission of the wood boards is converted into axial transmission for secondary measurement. The present invention is provided with a transfer roller belt to ensure that the wood boards do not stop during the transfer process. The specific example is: Figure 5 As shown, a plurality of transfer roller belts 200 are arranged between the rollers of the roller conveyor belt 20 of the second measuring part 2, and the upper surface of the roller of the transfer roller belt 200 is lower than the upper surface of the roller of the roller conveyor belt 20; one end of the transfer roller belt 200 deviating from the first measuring part 1 is rotatably connected to the side frame of the roller conveyor belt 20, and the other end extends to the downstream end of the chain conveyor belt 10 and is hinged with an inclined rod 201 at the lower part of the end, and the other end of the inclined rod 201 is fixed to a rotating shaft 202 The two ends of the rotating shaft 202 can be rotatably installed on the frame of the corresponding conveyor belt, and the rotating shaft 202 is connected to a rotating motor for driving; when the rotating shaft 202 rotates, it drives the hinged end of the inclined rod 201 to move upward, and the upper surface of the roller at the hinged end of the transfer roller belt 200 is not lower than the upper surface of the chain conveyor belt 10, so that the chain conveyor belt transfers the wooden board to the transfer roller belt, and then transmits it from the transfer roller belt to the roller conveyor belt. After the transmission is completed, the roller conveyor belt is started to transmit the wooden board axially.

[0075] The detection line of the present invention has high production efficiency and can also continuously and quickly sort wood or compressed wood of different lengths and widths to improve the sorting efficiency. In the corresponding technical solution, Figure 3As shown, the number of the first chain conveyor belts is set to five, which are arranged on the side of the second measuring part in the direction from the downstream to the upstream of the second measuring part, and include the first conveyor chain, the second conveyor chain, the third conveyor chain, the fourth conveyor chain and the fifth conveyor chain in sequence; the distance between the first conveyor chain and the second conveyor chain is 280mm, the distance between the second conveyor chain and the third conveyor chain is 560mm, the distance between the third conveyor chain and the fourth conveyor chain is 840mm, and the distance between the fourth conveyor chain and the fifth conveyor chain is 840mm. The outer end of the transfer roller belt downstream of the first chain conveyor belt is just placed on the side of the downstream end of the corresponding conveyor chain. Therefore, the number of transfer roller belts is equivalent to that of the first chain conveyor belt, or slightly increased or decreased as needed. Of course, the number of conveyor belts and the number of transfer roller belts described in the present invention can be increased or decreased according to the actual situation of the wooden board to adapt to more scenarios.

[0076] In a specific example, when the length of the plate is 600mm, there are 2 conveyor chains and 2 transfer roller belts. When the length of the plate is greater than 600mm and less than 1120mm (560mm+560mm) (1000mm (160mm+260mm+560mm) can also be taken, the corresponding parameters will be adjusted and will not be repeated.), there are 3 conveyor chains and 2 transfer roller belts. When the length of the plate is greater than or equal to 1120mm but less than 1680mm, there are 3 conveyor chains and 3 transfer roller belts. When the length of the plate is greater than or equal to 1680mm but less than 2520mm, there are 4 conveyor chains and 4 transfer roller belts. When the length of the plate is greater than or equal to 2520mm but less than or equal to 3000mm, there are 4 conveyor chains and 5 transfer roller belts.

[0077] In addition, according to the above scheme, the microwave moisture content measuring device is arranged between adjacent first chain conveyor belts 10. In a specific example, there are four microwave moisture content measuring devices, namely, 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 from left to right. Figure 1 As shown, in the first chain conveyor, from left to right are respectively the first conveying chain, the second conveying chain, the third conveying chain, the fourth conveying chain and the fifth conveying chain; in the transfer roller belt, from left to right are respectively transfer roller belt 1, transfer roller belt 2, transfer roller belt 3, transfer roller belt 4 and transfer roller belt 5.

[0078] For boards with a length less than 600 mm (critical value, preset according to production conditions), the configuration (manual or automatic) is that any microwave moisture meter antenna 86 is not activated.

[0079] For a plate equal to 600 mm (spanning the first conveyor chain and the second conveyor chain; and spanning the transfer roller belt 1 and the transfer roller belt 2), the microwave moisture content measuring device 86-1 is configured to start.

[0080] For plates with a length greater than 600mm but less than 1120mm (560mm+560mm) (spanning the first conveyor chain, the second conveyor chain, and the third conveyor chain; and spanning the transfer roller belt 1 and the transfer roller belt 2), the microwave moisture content measuring equipment 86-1 and the microwave moisture content measuring equipment 86-2 are configured to start.

[0081] For a length greater than or equal to 1120mm but less than 1680mm (560mm+560mm+560mm) (across the first conveyor chain, the second conveyor chain, the third conveyor chain; and across the transfer roller belt 1, the transfer roller belt 2, the transfer roller belt 3), the microwave moisture content measuring equipment 86-1, the microwave moisture content measuring equipment 86-2, and the microwave moisture content measuring equipment 86-3 are configured to start.

[0082] For the length greater than or equal to 1680mm but less than or equal to 3000mm (across the first conveyor chain, the second conveyor chain, the third conveyor chain, the fourth conveyor chain; and across the transfer roller belt 1, the transfer roller belt 2, the transfer roller belt 3, and the transfer roller belt 4.

[0083] When the length is greater than or equal to 2520mm (560mm+560mm+560mm+840mm) but less than or equal to 3000mm, it crosses the transfer roller belt 1, transfer roller belt 2, transfer roller belt 3, transfer roller belt 4, transfer roller belt 5), and is configured as microwave moisture content measuring equipment 86-1, microwave moisture content measuring equipment 86-2, microwave moisture content measuring equipment 86-3, and microwave moisture content measuring equipment 86-4 to start.

[0084] The weight measuring mechanism 17 in the detection line of the present invention is a weighing machine installed between the adjacent conveyor belts of the first chain conveyor belt 10, which is used to measure the weight of the wooden board. The bottom of the weighing machine is fixed by a lifting chassis. When the wooden board reaches the tray position of the weighing machine, the lifting chassis rises, and the wooden board is separated from the first chain conveyor belt 10 for weighing. In actual settings, the weight measuring mechanism 17 is set between the second conveyor chains, and of course, multiple weighing mechanisms are also set on multiple conveyor chains to achieve stable weight measurement.

[0085] The stopper of the present invention is a rotating structure or a lifting structure with a baffle. Specifically, a plurality of baffles are arranged on the same rod body, such as Figure 3As shown in the label 18, the baffle is correspondingly arranged between adjacent conveyor belts; when it is necessary to intercept the wooden board, the baffle is blocked in front of the conveying position by rotating or lifting, and when it is not necessary to intercept, the baffle is moved out of the conveying position by rotating or lifting.

[0086] Figure 6 In the illustrated scheme, a cutting section 3 is provided upstream of the first chain conveyor belt 10, and the cutting section 3 includes a second chain conveyor belt 30 and a cutting machine 31. The downstream of the second chain conveyor belt 30 is connected to the upstream end of the first chain conveyor belt 10, and the cutting machine 31 is a cutting roller installed on both sides of the second chain conveyor belt 30.

[0087] The conveyor chain on one side of the second chain conveyor belt 30 is located outside the horizontal line where the first chain conveyor belt 10 is located; it should be noted that this part refers to Figure 6 As shown, the conveying chain on the left side of the second chain conveyor belt 30 is outside the horizontal line where the left side of the first chain conveyor belt 10 is located, so that the wooden board has space to move rightward to the standard position when it is transferred from the second chain conveyor belt 30 to the first chain conveyor belt 10. Specifically, the upstream part of the first chain conveyor belt 10 is provided with an adjustment station 111, and the downstream end of the adjustment station 111 is provided with a stopper 18-1. A pad 112 is provided on the outer side (left side in the figure) of the first chain conveyor belt 10 corresponding to the adjustment station 111, and a pusher 113 is installed on the pad 112. The pusher 113 includes a pusher 114 that is telescopic toward the inner side of the conveyor belt, and the position of the pusher 114 in the retracted state is outside the horizontal line where the second chain conveyor belt 30 is located. The wooden board (600mm~3000mm) is pushed to the target position by the pusher to ensure that the wooden board within the interval can be accurately measured. The pusher set on this side ensures that no matter how long the wooden board is, it will always move to the standard position after the pusher pushes a certain distance.

[0088] The operation process is as follows: when the wooden board is transferred from the second chain conveyor belt 30 to the first chain conveyor belt 10 and then continues to be transferred, the wooden board is stopped by the stopper after reaching the adjustment position. At this time, the first chain conveyor belt 10 stops running. In this stage, a lifting pallet can also be set between the conveyor belts to lift the wooden board high on the conveyor belt; the pusher 114 of the pusher pushes the wooden board to the target position, so that various measurements can be performed at the accurate measuring position during the subsequent transmission of the wooden board; after the wooden board is adjusted into place, the lifting pallet descends to make the wooden board fall on the conveyor belt, the stopper rotates to open, and the first chain conveyor belt restarts to continue transmission.

[0089] Through the above adjustment station, no matter how long the wooden board is, it can be adaptively adjusted to the measuring station, which simplifies the preliminary processing procedures. Of course, in addition to the above adjustment station structure, other technical solutions can also be adopted; in another improved example, Figure 7 As shown, an adjustment station is provided at the upstream part of the first chain conveyor belt 10, and a stopper is provided at the downstream end of the adjustment station. A limiting pad 116 aligned with the left side of the measuring station is provided on the left side of the first chain conveyor belt 10 corresponding to the adjustment station, and a pusher 113-1 is provided on the other side corresponding to the adjustment station. The pusher 113-1 includes a pusher 114-1 extending toward the inner side of the conveyor belt. When the wooden board is transmitted to the first chain conveyor belt 10, it is stopped by the stopper after reaching the adjustment station. At this time, the first chain conveyor belt 10 stops running. In this stage, a lifting pallet can also be set between the conveyor belts to lift the wooden board high on the conveyor belt; the pusher 114-1 of the pusher pushes the wooden board to the limiting pad 116, so that various measurements can be carried out at the accurate measuring station during the subsequent transmission of the wooden board; after the wooden board is adjusted into place, the lifting pallet descends to make the wooden board fall on the conveyor belt, the stopper rotates to open, and the first chain conveyor belt restarts to continue transmission.

[0090] In yet another improved example of the present invention, Figure 8 As shown, the frame also includes an NG product sorting section 40 connected to the downstream end of the second measuring section 20 and arranged along the axial direction of the wooden board, and an OK product sorting section 50 connected to the downstream end of the NG product sorting section 40 and arranged along the axial direction of the wooden board; the NG product sorting section 40 and the OK product sorting section 50 are both equipped with roller conveyor belts, and a third chain conveyor belt 41 for outputting NG products is provided on one side of the NG product sorting section 40, and a fourth chain conveyor belt 51 for outputting OK products is provided on one side of the OK product sorting section 50. Of course, since the angle needs to be changed when the wooden board is transferred from the sorting section to the chain conveyor belt, it is also necessary to set a transfer roller belt on the roller conveyor belt of the sorting section to achieve this. The structure of the transfer roller belt is the same as that of the second measuring section, and will not be described in detail here. At the downstream end of the roller conveyor belts of the NG product sorting section 40 and the OK product sorting section 50, lifting baffles 43 and 53 can be set to judge whether the wooden board belongs to NG products or OK products according to the measurement information of the current wooden board, and drive the baffles of the corresponding conveyor belts to rise and intercept, and transfer to the conveyor belts of the corresponding selected products.

[0091] The present invention can continuously and quickly sort large quantities of wood or compressed wood of different lengths and widths based on the average moisture content of the wood board, wherein the average moisture content is the average value of the measured moisture content or the average value of the detected moisture content corrected based on the wood volume. The purpose of continuous and rapid sorting is to improve the production efficiency and product quality of the entire high-frequency compressed wood production line.

[0092] The present invention can continuously and quickly measure the moisture content, weight, thickness, width and length of large quantities of wood or compacted wood, thereby greatly improving production efficiency. On the one hand, continuous and rapid sorting of wood or compacted wood of different lengths and widths improves sorting efficiency. On the other hand, measuring the total volume of a batch allows the supplier's wood to be directly connected to a high-frequency compacted wood production line. Purchases can be made from the wood supplier based on the total volume of wood with a qualified moisture content, thereby reducing the wood storage space of the factory or eliminating the need for storage space.

[0093] In order to improve product quality, on the one hand, the volume and moisture content of a single material can be measured and marked continuously and quickly, providing moisture content and volume data for subsequent processes such as high-frequency hot pressing in the high-frequency compacting wood production line, and then the high-frequency hot pressing parameters (high-frequency frequency, heating time and interval time, dielectric constant, compression ratio, compression time and interval time, etc.) can be adjusted for each material in these subsequent processes. On the other hand, the compacting wood (finished product) with different moisture contents can be further sorted continuously and quickly, which is very suitable for further preparation of horizontally spliced ​​boards with compacting wood, because the difference in moisture content between the two compacting wood pieces before splicing is too large, which is not conducive to splicing.

[0094] The example of the second aspect of the present invention provides a detection system for sorting wood for compacting wood or compacting wood based on moisture content based on the above detection line. Fig. 9 As shown, it 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. Each module is set according to the function realized by the above detection line structure.

[0095] The measuring module comprises:

[0096] The microwave moisture content measuring unit is arranged at multiple positions along the axial direction of the wooden board for setting and testing;

[0097] a weight measuring unit configured to measure the weight of the wooden board by means of a lifting weighing machine;

[0098] A width measuring unit is provided with an encoder installed on the first chain conveyor belt driving motor, and measures the width while performing a first thickness measurement on the wood board during radial transmission;

[0099] The length measuring unit is equipped with an encoder installed on the roller conveyor belt driving motor, which measures the length of the wood board while performing a second thickness measurement during axial transmission;

[0100] The thickness measuring unit comprises lifting type clamping rollers respectively arranged on the first chain conveyor belt and the roller conveyor belt, and a displacement sensor arranged on the clamping roller side for measuring the height of the clamping roller.

[0101] The control module includes

[0102] The measuring module start-stop unit is configured on the microwave moisture content measuring unit and the weight measuring unit. The photoelectric sensor detects that the template exists and starts when it is detected, and stops when the wooden board does not exist.

[0103] A stopper unit is provided with a photoelectric sensor or a pressure sensor on the stoppers of the adjustment station and the third measuring station to detect whether the wooden board exists, and when the wooden board exists, the adjustment measurement of the corresponding station is performed and the stopper is closed, and the stopper is opened after the wooden board is removed;

[0104] Conveyor belt start-stop unit, photoelectric sensors are configured at the end of the conveyor belt and each workstation to detect whether there is a wooden board, and start conveying when it exists, and stop conveying when it does not exist;

[0105] The storage module is configured to encode and store data corresponding to the measured moisture content, thickness, length, width and volume of each wooden board;

[0106] The data processing module includes

[0107] A volume calculation unit, configured to calculate the volume of the corresponding wooden board according to the thickness, length and width of the measured wooden board;

[0108] The moisture content calculation unit calculates the specific gravity of the wooden board according to the volume and weight of the wooden board, and calculates the moisture content of the wooden board in combination with the average moisture content of the wooden board detected by microwaves.

[0109] An example of the third aspect of the present invention discloses a method for detecting wood for compacting or compacting wood based on moisture content, comprising the following steps:

[0110] S1. Measure the weight of the board;

[0111] S2, measuring the moisture content of multiple measuring points of the wooden board, and calculating the average moisture content;

[0112] S3, using a first thickness measuring mechanism to measure the thickness of the wooden board at each position along the radial direction; when the wooden board passes the position of the first thickness measuring mechanism, using an encoder to measure the width;

[0113] S4, using a second thickness measuring mechanism to measure the thickness of the wooden board at various positions along the axial direction, and calculating an average value in combination with the thickness in step S2; when the wooden board passes the position of the second thickness measuring mechanism, using an encoder to measure the length;

[0114] S5, calculating the volume of the wooden board using the length, width and thickness values ​​obtained in steps S3-S5;

[0115] S6. Calculate the specific gravity of the wooden board according to the volume and weight of the wooden board, and calculate the corrected moisture content of the wooden board in combination with the average moisture content in step S2.

[0116] It should be noted that the specific correction algorithm for the moisture content of the wood board refers to the calculation method of Japanese patent P2001-124707A (2001.5.11), and the final moisture content η = W s / (ω-W s )×100(%);ω=W1 / S, where η represents the moisture content, W s The present invention discusses a detection line for realizing continuous and rapid measurement of large quantities of wood boards, and correcting the moisture content through the detection data of the detection line.

[0117] The above technical solution is only one implementation mode of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the present invention, and it is not limited to the technical solution described in the above specific embodiments of the present invention. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. A testing line for sorting wood for compacting or compacting wood based on moisture content, comprising a frame, characterized in that: The frame includes a first measuring portion arranged along the radial direction of the wooden board and a second measuring portion connected to the downstream end of the first measuring portion and arranged along the axial direction of the wooden board; The first measuring part is provided with a plurality of first chain conveyor belts parallel to the axial direction of the wooden board, and the first chain conveyor belt is provided with a first thickness measuring mechanism and a width measuring mechanism corresponding to the first measuring station on the frame; the second measuring part comprises a roller conveyor belt, and the downstream end of the roller conveyor belt is provided with a length measuring mechanism and a second thickness measuring mechanism; The first thickness measuring mechanism and the second thickness measuring mechanism include a lifting clamping roller assembly arranged above the conveyor belt and a thickness measuring device arranged on the lifting clamping roller assembly. The width measuring mechanism and the length measuring mechanism both use an encoder installed on the driving motor of the corresponding conveyor belt. When the thickness measuring device receives a measurement signal, the encoder starts to measure the width or length of the wooden board. When the thickness measuring device stops receiving the measurement signal, the encoder stops measuring.

2. The detection line for sorting wood for compacting wood or compacting wood based on moisture content according to claim 1, characterized in that: The lifting clamping roller assembly includes a fixed shaft installed on the side frame of the conveyor belt, a connecting block movably installed on the fixed shaft, a roller shaft connected to the connecting block and extending outward to the top of the conveyor belt, and a clamping roller sleeved on the outer end of the roller shaft, the upper end or the lower end of the connecting block is connected to the side frame of the conveyor belt through an elastic connecting piece, and 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; the thickness measuring device is a displacement sensor installed on the upper end or the lower end of the fixed shaft.

3. The detection line for sorting wood for compacting wood or compacting wood based on moisture content according to claim 1, characterized in that: The second measuring station on the frame corresponding to the first chain conveyor belt is provided with a moisture content measuring mechanism, and the second measuring station is located upstream of the first measuring station; the third measuring station on the frame corresponding to the first chain conveyor belt is provided with a weight measuring mechanism, and the third measuring station is located upstream of the second measuring station, and a stopper is provided at the downstream end of the third measuring station.

4. The detection line for sorting wood for compacting wood or compacting wood based on moisture content according to claim 3, characterized in that: The moisture content measuring mechanism includes a plurality of microwave moisture content measuring devices arranged between adjacent first chain conveyor belts, and the microwave moisture content measuring devices include a microwave transmitting antenna arranged on the upper side of the first chain conveyor belt and a microwave receiving end arranged on the lower side of the first chain conveyor belt; the weight measuring mechanism is a weighing machine installed between adjacent first chain conveyor belts using a lifting chassis.

5. The detection line for sorting wood for compacting wood or compacting wood based on moisture content according to claim 1, characterized in that: A plurality of transfer roller belts are arranged between the rollers of the roller conveyor belt of the second measuring part, and the upper surface of the roller of the transfer roller belt is lower than the upper surface of the roller of the roller conveyor belt; one end of the transfer roller belt deviating from the first measuring part is rotatably connected to the side frame of the roller conveyor belt, and the other end extends to the downstream end of the chain conveyor belt and is hinged with an inclined rod at the lower part of the end, and the other end of the inclined rod is fixed to a rotating shaft, and both ends of the rotating shaft are rotatably installed on the frame, and the rotating shaft is connected to a rotating motor for driving; when the rotating shaft rotates, it drives the hinged end of the inclined rod to move upward, and the upper surface of the roller of the hinged end of the transfer roller belt is not lower than the upper surface of the chain conveyor belt.

6. The detection line for sorting wood for compacting wood or compacting wood based on moisture content according to claim 1, characterized in that: There are five first chain conveyor belts, which are arranged on the side of the second measuring part corresponding to the direction from downstream to upstream of the second measuring part, and include the first conveyor chain, the second conveyor chain, the third conveyor chain, the fourth conveyor chain and the fifth conveyor chain in sequence; the distance between the first conveyor chain and the second conveyor chain is 280mm, the distance between the second conveyor chain and the third conveyor chain is 560mm, the distance between the third conveyor chain and the fourth conveyor chain is 840mm, and the distance between the fourth conveyor chain and the fifth conveyor chain is 840mm.

7. The detection line for sorting wood for compacting wood or compacting wood based on moisture content according to claim 6, characterized in that: A cutting section is provided upstream of the first chain conveyor belt, the cutting section includes a second chain conveyor belt and a cutting machine, the downstream of the second chain conveyor belt is connected to the upstream end of the first chain conveyor belt, and the cutting machine is a cutting roller installed on both sides of the second chain conveyor belt; The conveyor belt of the second chain conveyor belt corresponding to the downstream side of the second measuring part is outside the horizontal line where the first conveyor chain is located; the upstream part of the first chain conveyor belt is provided with an adjustment station, and the downstream end of the adjustment station is provided with a stopper, and a pad is provided on the outer side of the first chain conveyor belt corresponding to the adjustment station, and a pusher is installed on the pad, and the pusher includes a push handle which extends toward the inner side of the conveyor belt, and the position of the push handle in the retracted state is outside the horizontal line where the second chain conveyor belt is located.

8. The detection line for sorting wood for compacting wood or compacting wood based on moisture content according to claim 1, characterized in that: The frame also includes an NG product sorting section connected to the downstream end of the second measuring section and having a transmission direction set along the axial direction of the wooden board, and an OK product sorting section connected to the downstream end of the NG product sorting section and having a transmission direction set along the axial direction of the wooden board; the NG product sorting section and the OK product sorting section are both equipped with roller conveyor belts, a third chain conveyor belt for outputting NG products is provided on one side of the NG product sorting section, and a fourth chain conveyor belt for outputting OK products is provided on one side of the OK product sorting section.

9. A detection system for sorting compressed wood or compressed wood based on moisture content applied to the detection line of claim 3, characterized in that: The system 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 measuring module comprises The microwave moisture content measuring unit is arranged at multiple positions along the axial direction of the wooden board for setting and testing; a weight measuring unit configured to measure the weight of the wooden board by means of a lifting weighing machine; A width measuring unit is provided with an encoder installed on the first chain conveyor belt driving motor, and measures the width while performing a first thickness measurement on the wood board during radial transmission; The length measuring unit is equipped with an encoder installed on the roller conveyor belt driving motor, which measures the length of the wood board while performing a second thickness measurement during axial transmission; A thickness measuring unit, comprising lifting clamping rollers respectively arranged on the first chain conveyor belt and the roller conveyor belt, and a displacement sensor arranged on the side of the clamping roller to measure the height of the clamping roller; The control module includes The measuring module start-stop unit is configured on the microwave moisture content measuring unit and the weight measuring unit. The photoelectric sensor detects that the template exists and starts when it is detected, and stops when the wooden board does not exist. A stopper unit is provided with a photoelectric sensor or a pressure sensor on the stoppers of the adjustment station and the third measuring station to detect whether the wooden board exists, and when the wooden board exists, the adjustment measurement of the corresponding station is performed and the stopper is closed, and the stopper is opened after the wooden board is removed; Conveyor belt start-stop unit, with photoelectric sensors at the end of the conveyor belt and at each workstation to detect whether a wooden board exists, and start conveying if it exists, and stop conveying if it does not exist; The storage module is configured to encode and store data corresponding to the measured moisture content, thickness, length, width and volume of each wooden board; The data processing module includes A volume calculation unit, configured to calculate the volume of the corresponding wooden board according to the thickness, length and width of the measured wooden board; The moisture content calculation unit calculates the specific gravity of the wooden board according to the volume and weight of the wooden board, and calculates the moisture content of the wooden board in combination with the average moisture content of the wooden board detected by microwaves.

10. A method for detecting wood materials or compressed wood based on moisture content, applied to the detection system of claim 9, comprising the following steps: S1. Measure the weight of the board; S2, measuring the moisture content of multiple measuring points of the wooden board, and calculating the average moisture content; S3, using a first thickness measuring mechanism to measure the thickness of the wooden board at each position along the radial direction; when the wooden board passes the position of the first thickness measuring mechanism, using an encoder to measure the width; S4, using a second thickness measuring mechanism to measure the thickness of the wooden board at various positions along the axial direction, and calculating an average value in combination with the thickness in step S2; when the wooden board passes the position of the second thickness measuring mechanism, using an encoder to measure the length; S5, calculating the volume of the wooden board using the length, width and thickness values ​​obtained in steps S3-S5; S6. Calculate the specific gravity of the wooden board according to the volume and weight of the wooden board, and calculate the corrected moisture content of the wooden board in combination with the average moisture content in step S2.

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