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

Abstract

The utility model relates to a detection line and a detection system for sorting wood for compacted wood or compacted wood based on moisture content. The detection line comprises a first measuring part arranged in the conveying direction in 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 conveying direction in 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 a first measuring station of each first chain type conveying belt is provided with a lifting type clamping roller assembly and a width measuring mechanism; the second measuring part comprises a roller type conveying belt, and a length measuring mechanism and a lifting type clamping roller assembly are arranged at the downstream end of the roller type conveying belt; the lifting type clamping roller assembly adopts a passive roller shaft capable of moving in a lifting mode and a clamping roller installed on the roller shaft, and the width measuring mechanism and the length measuring mechanism both adopt encoders installed on driving motors of the corresponding conveying belts. 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 utility model relates to the field of wood board detection and sorting equipment, in particular to a detection line and a detection system for sorting wood materials or compacted 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 performance of the compacted wood, but also has a great impact on the safety and controllability of the compaction process.

[0003] High-frequency wood compression production lines generally include preheating equipment, high-frequency hot presses, cooling equipment, etc., and some patents involve moisture content measurement equipment. CN 109808013 A (2019.05.28) discloses a moisture content measurement unit 8 located upstream of the high-frequency wood compression production line. The microwave transmitting end 830 is located at the bottom of the measurement bracket 84, and the microwave receiving end 831 is located on the transmission link of the measurement section 80. The measurement bracket 84 is moved horizontally and vertically by a moving mechanism. Through this moisture content measurement unit 8, wood 1 with unqualified moisture content can be directly removed 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 the mobile mechanism, and when detecting wood 1 of different widths, the operator needs to move the measuring bracket 84 in the vertical direction through the mobile mechanism, the patent cannot continuously and quickly load large quantities of wood of different lengths or widths. In addition, even if the mobile measuring bracket 84 is used, the length range and width range of the wood that can be detected are also 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 issue an alarm when the moisture content is not within a preset range. The rotating bracket of this 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. Moreover, 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 materials located upstream of a high-frequency compacted wood production line. The system can measure the moisture content of compacted wood materials transmitted on a conveyor line 10. A carrier 30 is mounted 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 disposed between the two support sections 31. The spacing between the two connecting sections 32 is adjustable. Since the spacing between the two connecting sections 32 is adjustable, the thickness redundancy of the processed wood is increased. However, since the carrier 30 is directly mounted 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 quantities 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, more strict distinction of moisture content is required. Utility Model Content

[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 and a detection system for sorting wood materials or compressed wood based on moisture content.

[0006] The utility model is realized through the following technical solutions:

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

[0008] The first measuring section is provided with a plurality of first chain conveyor belts installed parallel to the axial direction of the wooden board. The first chain conveyor belts are provided with a lifting clamping roller assembly and a width measuring mechanism corresponding to the first measuring station on the frame. The second measuring section includes a roller conveyor belt, and the downstream end of the roller conveyor belt is provided with a length measuring mechanism and a lifting clamping roller assembly.

[0009] The lifting clamping roller assembly adopts a roller shaft that can be lifted and lowered and installed on the side of the conveyor belt, and a clamping roller installed on the roller shaft. The roller shaft is passively lifted and lowered, and the width measuring mechanism and the length measuring mechanism both use encoders installed on the drive motor of the corresponding conveyor belt.

[0010] Preferably, the lifting clamping roller assembly is provided with a thickness measuring device; the thickness measuring device is a displacement sensor for measuring the moving distance of the roller shaft.

[0011] Preferably, the lifting clamping roller assembly includes a hollow tubular fixed shaft installed on the side frame of the conveyor belt, a connecting block installed in the fixed shaft and movable up and down, a roller connected to the side of 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. A longitudinal slide for the roller shaft to move up and down is provided on the side of the fixed shaft. The upper end of the connecting block is connected to the conveyor belt side frame at the upper end of the fixed shaft 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 at the lower end of the fixed shaft.

[0012] 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.

[0013] Preferably, the moisture content measuring mechanism includes several 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.

[0014] Preferably, a plurality of transfer roller belts are provided between the rollers of the roller conveyor belt of the second measuring portion, 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 portion can be 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 to an inclined rod at the lower part of the end, the other end of the inclined rod is fixed to a rotating shaft, and both ends of the rotating shaft can be 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;

[0015] The transfer roller belt includes a roller shaft and a plurality of rollers installed on the upper side of the roller shaft, and the upper surface of the roller is at the top surface of the roller shaft; the number of the transfer roller belts is the same as the number of conveyor belts of the first chain conveyor belt, and the transfer roller belts are respectively arranged on the downstream side of each conveyor belt of the first chain conveyor belt.

[0016] 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.

[0017] Preferably, a cutting section is provided upstream of the first chain conveyor belt, the cutting section comprising a second chain conveyor belt and a cutting machine, the downstream end 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;

[0018] 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 the outer side of the first chain conveyor belt corresponding to the adjustment station is provided with a pad, and a pusher is installed on the pad, and the pusher includes a pusher that extends toward the inside of the conveyor belt, and the position of the pusher in the retracted state is outside the horizontal line where the second chain conveyor belt is located.

[0019] 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.

[0020] The second aspect of the utility model discloses a detection system for sorting compressed wood materials or compressed wood based on moisture content based on the above-mentioned 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;

[0021] The measurement module includes

[0022] Microwave moisture content measuring units are arranged at multiple locations along the axial direction of the wooden board for detection;

[0023] a weight measuring unit configured to measure the weight of the wooden board by means of a lifting weighing machine;

[0024] a width measuring unit, configured with an encoder mounted on a driving motor of the first chain conveyor belt, for measuring the width of the wood board while performing a first thickness measurement during radial transmission;

[0025] The length measuring unit is equipped with an encoder installed on the roller conveyor belt drive motor, which measures the second thickness and length of the wood board during axial transmission;

[0026] 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 provided on the side of the clamping rollers for measuring the height of the clamping rollers;

[0027] The control module includes

[0028] A measuring module start-stop unit is configured on the microwave moisture content measuring unit and the weight measuring unit, wherein a photoelectric sensor is configured to detect the presence of the template and start the unit and stop the unit when the wooden board is not present;

[0029] A stopper unit is provided with a photoelectric sensor or a pressure sensor on the stoppers of the adjustment station and the third measurement station respectively 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;

[0030] Conveyor belt start-stop unit: photoelectric sensors are installed at the end of the conveyor belt and at each workstation to detect whether there is a wooden board. If there is, the conveyor starts conveying; if not, the conveyor stops conveying.

[0031] The storage module is configured to encode and store data corresponding to the measured moisture content, thickness, length, width and volume of each wood board;

[0032] The data processing module includes

[0033] 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;

[0034] The moisture content calculation unit calculates the specific gravity of the wood board according to the volume and weight of the wood board, and calculates the moisture content of the wood board in combination with the average moisture content of the wood board detected by microwaves.

[0035] Compared with the prior art, the beneficial effects of the present invention include:

[0036] 1. This testing line measures the thickness of the wood board at various locations through sequential radial and axial transmission, ensuring accurate thickness measurements. Furthermore, the thickness measurement mechanism uses a lifting clamping roller to simultaneously measure the thickness while activating an encoder to measure the corresponding width and length of the board. This eliminates the need for pausing for measurement, ensuring rapid board flow while multiple data are measured, enabling continuous and rapid measurement.

[0037] 2. The utility model 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, thereby improving the accuracy of the moisture content data.

[0038] 3. This new testing line can realize the continuous and rapid measurement of thickness, weight, length, width and moisture content of large quantities of wood or compressed wood of different sizes and weights; it improves sorting efficiency and greatly improves production efficiency. Measuring the total volume of the batch allows the supplier's wood to be directly connected to the high-frequency compressed wood production line. Procurement from the wood supplier based on the total volume of wood with qualified moisture content can reduce the factory's wood storage space or eliminate the need for storage space.

[0039] 4. This testing line can also continuously and rapidly measure and mark the volume and moisture content of a single material, providing moisture content and volume data for subsequent processes such as high-frequency hot pressing in the high-frequency compressed wood production line. This allows for individual adjustment of high-frequency hot pressing parameters for each material in these subsequent processes. This continuous and rapid sorting of compressed wood (finished products) with varying moisture contents is ideal for preparing cross-joined boards from compressed wood, as a large difference in moisture content between two pieces of compressed wood before splicing can hinder splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic structural diagram of a first embodiment of a detection line for sorting timber for compacted wood or compacted wood based on moisture content.

[0041] Figure 2 This is a schematic structural diagram of a first embodiment of a thickness measuring mechanism;

[0042] Figure 3 This is a schematic structural diagram of a second embodiment of a detection line for sorting timber for compacted wood or compacted wood based on moisture content.

[0043] Figure 4 This is a schematic structural diagram of a second embodiment of a thickness measuring mechanism;

[0044] Figure 5 It is a structural diagram of the transfer roller belt;

[0045] Figure 6 Schematic diagram of the structure of a third embodiment of a detection line for sorting wood for compacted wood or compacted wood based on moisture content;

[0046] Figure 7 Schematic diagram of the structure of a fourth embodiment of a detection line for sorting wood for compacted wood or compacted wood based on moisture content;

[0047] Figure 8 Schematic diagram of the structure of a fifth embodiment of a detection line for sorting wood for compacted wood or compacted wood based on moisture content;

[0048] Figure 9 The diagram is a schematic diagram of the structure of a detection system for sorting wood for compacting or compacting wood based on moisture content. DETAILED DESCRIPTION

[0049] The moisture content-based sorting method of the present invention for the detection line of compressed wood or compressed wood is not limited to high-frequency compression lines, but can also be used for steam compression lines and artificial board lines, such as density boards, particle boards, integrated materials, laminated materials, etc.

[0050] In various embodiments, the moisture content-based wood sorting inspection line of the present invention is placed upstream of a high-frequency wood densification line. It can be spatially located in the same workshop or in separate workshops as other downstream high-frequency wood densification lines. Sorted wood boards can be transported to downstream lines using automatic or semi-automatic conveying equipment. In some embodiments, the moisture content-based wood sorting inspection line of the present invention is placed upstream of a progressively awakening high-frequency densification line.

[0051] Multiple embodiments of the detection line for sorting compressed wood based on moisture content of the present invention are placed downstream of the high-frequency compressed wood production line, and can be spatially placed in the same workshop or different workshops as other sections of the upstream high-frequency compressed wood production line.

[0052] The moisture content sorting and 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 needs. That is, the moisture content sorting and detection line of the present invention for high-frequency compacted wood is not limited to being placed upstream or downstream of the production line.

[0053] The term "timber" in the present invention refers to the original wood board obtained after pre-treatment such as sawing and drying.

[0054] 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.

[0055] 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.

[0056] Figure 1 A testing line for sorting compressed wood or compressed wood based on moisture content is shown. The line includes a frame comprising a first measuring section 1 arranged radially along the wood board's conveying direction, and a second measuring section 2, connected to the downstream end of the first measuring section 1 and arranged axially along the wood board's conveying direction. The radial and axial directions herein refer to the current wood board's radial and axial directions.

[0057] The first measuring section 1 comprises several sets of first chain conveyor belts 10 mounted parallel to the wood board's axis. These first chain conveyor belts 10 are equipped with a lifting clamping roller assembly and a width measurement mechanism corresponding to the first measuring station 11 on the frame. The second measuring section 2 comprises a roller conveyor belt 20, with a length measurement mechanism and a lifting clamping roller assembly installed at the downstream end. Both the width and length measurement mechanisms utilize encoders (not shown) mounted on the corresponding conveyor belt's drive motors. 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, 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 by positioning the clamping roller and quickly converting the wooden board in the radial and axial directions on the same detection line, thereby realizing the rapid and continuous measurement of large quantities of wooden boards.

[0058] Figure 1 The technical solution shown can also realize multi-parameter detection 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 located 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 located upstream of the second measuring station 15. 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.

[0059] On the basis of the above-mentioned clamping structure, the thickness measuring mechanism can be arranged in a pause-type measuring station, and in another preferred technical solution, the thickness measuring mechanism is arranged in a lifting clamping assembly. Figure 3 In the detection line of the preferred scheme, the first measuring part 1 is equipped with several groups of first chain conveyor belts 10 installed 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.

[0060] Figure 3As 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 encoders installed on the driving motors of the corresponding conveyor belts, which are 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.

[0061] This testing line measures the thickness of each section of the wood plank through sequential radial and axial transport, ensuring accurate thickness measurements. Furthermore, the thickness measurement mechanism uses a lifting clamping roller to simultaneously measure the thickness while activating an encoder to measure the corresponding width and length of the board. While the entire board's thickness is measured using contact, there's no need to pause for measurement, ensuring rapid board movement while multiple data are measured, enabling continuous and rapid measurement.

[0062] 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 provided according to the actual conveyor belt situation.

[0063] It should 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. 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 connecting block 101 is built into the fixed shaft 100 of the tubular 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 end of the fixed shaft 100, and the bottom is connected to the connecting block 101. The displacement sensor 105 is installed at the bottom of the fixed shaft 100. Of course, based on this principle, the connecting 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, thereby ensuring the accuracy of the subsequent moisture content calculation.

[0064] The utility model detection line further includes moisture content detection, Figure 3 As shown, a moisture content measuring mechanism 19 is provided at a second measuring station 15 on the frame corresponding to the first chain conveyor 10. The second measuring station 15 is located upstream of the first measuring station 11. A weight measuring mechanism 17 is provided at a third measuring station 16 on the frame corresponding to the first chain conveyor 10. The third measuring station 16 is located upstream of the second measuring station 15. A stopper 18 is provided at the downstream end of the third measuring station 16. The thickness measuring device can use technologies such as laser thickness measurement and microwave thickness measurement.

[0065] The moisture content measuring mechanism 19 includes several 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.

[0066] The moisture content measurement mechanism described in the present invention uses a microwave method to detect the moisture content of a wood board. When a wood board passes radially through the microwave moisture content measurement device, the device rapidly acquires moisture content data at multiple measurement points along the radial direction of the wood board and calculates the average of these multiple measurement values ​​as the moisture content (average moisture content) of the corresponding wood board. The principle of microwave moisture content measurement is that in the microwave frequency band, the dielectric constant of water is much greater than that of general materials, and the frequent reversal of water dipoles consumes a large amount of electrical energy. Therefore, when microwaves penetrate a material with moisture content, the microwave energy loss caused by moisture is much greater than the loss caused by other dry matter. The moisture content in the material significantly affects its dielectric constant. By measuring the attenuation of microwave energy, the moisture content of the wood board can be inferred. During the scanning process, the microwaves are incident vertically onto the surface of the material being measured. If the moisture content of the measured material is greater than that of the absolutely dry test piece, the basic parameters of the transmitted wave, such as amplitude and phase, will undergo significant changes, thereby enabling quantitative detection of the moisture content of the wood 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 it senses a wooden board. It belongs to the prior art in this field and will not be described in detail here.

[0067] While the measured values ​​of a microwave moisture meter are highly correlated with the actual moisture content of the object being measured, the moisture content (%) is affected by variations in the specific gravity of the object being measured, reducing the accuracy of measurements for wood boards with varying specific gravity. In addition to directly measuring the moisture content of the wood board, the present invention also employs a method of "correcting the average value of the collected and measured moisture contents" to correct the moisture content. This method refers to the calculation method of Japanese Patent Application P2001-124707A (May 11, 2001), resulting in a final moisture content of η = W. s / (ω-W s )×100(%);ω=W1 / S, where η represents the moisture content, W s represents the moisture content per reference volume (SK) of the board, ω represents the specific gravity of the board, W1 represents the overall weight, and S represents the volume. As can be seen from the formula, the moisture content η of the board is calculated based on the moisture content WS per reference volume of the board and the specific gravity ω; for 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 utility model redesigns the detection line for the board, and while setting up a function for continuous and rapid measurement of large quantities of wood or compressed wood, it also includes the measurement and data processing of the volume of the wood board, that is, it includes the rapid and accurate measurement of the thickness, length and width of the board. The product of the aforementioned thickness, width and length is used to calculate the volume, which is the abbreviation of "board volume".

[0068] The encoder installed on the driving motor of the first chain conveyor belt is used to measure the width when the wooden board moves in its radial direction; the encoder installed on the driving motor of the roller conveyor belt is used to measure the length when the wooden board moves in its axial direction. The encoder can be selected from manufacturers including OMRON. The encoder is a rotary sensor that converts the position and displacement physical quantity 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. As an information collection element for the running status of the motor, the encoder is usually connected to the motor by mechanical installation; the encoder of the utility model measures and calculates the length and width of the wooden board by detecting the rotation angle of the driving motor.

[0069] In order to further improve the rapid measurement of large quantities of wood boards on the conveyor line, the radial transmission of the wood boards is converted into axial transmission for secondary measurement. The utility model is equipped 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 provided 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 deviates from the first measuring part 1 and 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 to 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 of 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.

[0070] The utility model has high production efficiency and can also continuously and quickly sort wood or compressed wood of different lengths and widths, thereby improving the sorting efficiency. Figure 3As shown, the number of the first chain conveyor belts is set to five, arranged on the side of the second measuring section from downstream to upstream, and including the first conveyor chain, the second conveyor chain, the third conveyor chain, the fourth conveyor chain, and the fifth conveyor chain in sequence; the spacing between the first conveyor chain and the second conveyor chain is 280mm, the spacing between the second conveyor chain and the third conveyor chain is 560mm, the spacing between the third conveyor chain and the fourth conveyor chain is 840mm, and the spacing 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 exactly 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 can be slightly increased or decreased as needed. Of course, the number of conveyor belts and transfer roller belts described in the utility model can be increased or decreased according to the actual situation of the wooden boards to adapt to more scenarios.

[0071] 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 here.), 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.

[0072] In addition, according to the above solution, the microwave moisture content measuring device is set 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 the first conveyor chain, the second conveyor chain, the third conveyor chain, the fourth conveyor chain and the fifth conveyor chain; in the transfer roller belt, from left to right are transfer roller belt 1, transfer roller belt 2, transfer roller belt 3, transfer roller belt 4 and transfer roller belt 5.

[0073] For boards with a length less than 600 mm (critical value, preset according to production conditions), the configuration (manual or automatic) is that none of the microwave moisture meter antennas 86 are activated.

[0074] 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.

[0075] 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.

[0076] For a length greater than or equal to 1120mm but less than 1680mm (560mm+560mm+560mm) (spanning the first conveyor chain, the second conveyor chain, and the third conveyor chain; and spanning the transfer roller belt 1, the transfer roller belt 2, and 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.

[0077] For the length greater than or equal to 1680mm but less than or equal to 3000mm (spanning the first conveyor chain, the second conveyor chain, the third conveyor chain, and the fourth conveyor chain; and spanning the transfer roller belt 1, the transfer roller belt 2, the transfer roller belt 3, and the transfer roller belt 4.

[0078] 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.

[0079] The weight measuring mechanism 17 in the inspection line of the present invention is a weighing machine installed between adjacent conveyor belts of the first chain conveyor 10 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 10 for weighing. In actual installation, the weight measuring mechanism 17 is installed between the second conveyor chains. Of course, multiple weighing mechanisms can also be installed on multiple conveyor chains to achieve stable weight measurement.

[0080] The stopper of the present invention is a rotating structure or a lifting structure with a baffle. Specifically, multiple baffles are set on the same rod body, such as Figure 3As shown in the reference numeral 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.

[0081] 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 with 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.

[0082] The conveying chain on one side of the second chain conveyor belt 30 is located outside the horizontal line of the first chain conveyor belt 10; it should be noted that this part refers to Figure 6 As shown, the conveyor chain on the left side of the second chain conveyor 30 is outside the horizontal line of the left side of the first chain conveyor 10, allowing space for wooden boards to move rightward to the standard position when they are transferred from the second chain conveyor 30 to the first chain conveyor 10. Specifically, an adjustment station 111 is provided at the upstream portion of the first chain conveyor 10, and a stopper 18-1 is provided at the downstream end of the adjustment station 111. A pad 112 is provided on the outer edge of the first chain conveyor 10 (left side in the figure), corresponding to the adjustment station 111. A pusher 113 is mounted on the pad 112. The pusher 113 includes a pusher 114 that extends toward the inside of the conveyor belt. When the pusher 114 is retracted, it is located outside the horizontal line of the second chain conveyor 30. The pusher pushes wooden boards (600mm to 3000mm) to the target position, ensuring that wooden boards within the range can be accurately measured. The pusher installed on this side ensures that wooden boards of any length will always move to the standard position after being pushed a certain distance by the pusher.

[0083] 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 continues to be transferred, it will be stopped by the stopper after reaching the adjustment position. At this time, the first chain conveyor belt 10 stops running. During 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 so that the wooden board falls on the conveyor belt, the stopper rotates open, and the first chain conveyor belt restarts to continue transmission.

[0084] By using the above adjustment station, no matter how long the wood board is, it can be adaptively adjusted to the measuring station, which simplifies the pre-processing process. Of course, in addition to the above adjustment station structure, other technical solutions can also be used; in another improved example, Figure 7 As shown, the upstream part of the first chain conveyor 10 is provided with an adjustment station, and the downstream end of the adjustment station is provided with a stopper, and the left side of the first chain conveyor 10 corresponding to the adjustment station is provided with a limit pad 116 aligned with the left side of the measuring station, and the other side corresponding to the adjustment station is provided with a pusher 113-1, and the pusher 113-1 includes a pusher 114-1 that extends toward the inside of the conveyor belt. When the wooden board is transmitted to the first chain conveyor 10, it is stopped by the stopper after reaching the adjustment station. At this time, the first chain conveyor 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 limit pad 116, so that the wooden board can be measured at the accurate measuring station during the subsequent transmission process; 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 open, and the first chain conveyor belt restarts and continues to transmit.

[0085] In 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 with a transmission direction 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 with a transmission direction 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 wooden board needs to be transferred from the sorting section to the chain conveyor belt when the angle is changed, 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 based on the measurement information of the current wooden board, and drive the baffles of the corresponding conveyor belt to rise and intercept, and transfer to the conveyor belt of the corresponding selected product.

[0086] This utility model allows for continuous and rapid sorting of large batches of wood or compressed wood of varying lengths and widths based on their average moisture content, which is the average of measured moisture contents or the average of measured moisture contents corrected based on wood volume. The goal of this continuous and rapid sorting is to improve the production efficiency and product quality of the entire high-frequency compressed wood production line.

[0087] The utility model can continuously and rapidly measure the moisture content, weight, thickness, width and length of large quantities of wood or compressed wood, thereby greatly improving production efficiency. On the one hand, it can continuously and rapidly sort wood or compressed wood of different lengths and widths, thereby improving sorting efficiency. On the other hand, measuring the total volume of a batch allows the supplier's wood to be directly connected to the high-frequency compressed wood production line. Purchases can be made from the wood supplier based on the total volume of wood with qualified moisture content, thereby reducing the factory's wood storage space or eliminating the need for storage space.

[0088] To improve product quality, on the one hand, the continuous and rapid measurement and marking of the volume and moisture content of a single material can provide moisture content and volume data for subsequent processes such as high-frequency hot pressing in the high-frequency compressed wood production line. In these subsequent processes, 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 individually. On the other hand, the continuous and rapid sorting of compressed wood (finished products) with different moisture contents is very suitable for further preparation of horizontally spliced ​​boards from compressed wood, because a large difference in moisture content between two pieces of compressed wood before splicing is not conducive to splicing.

[0089] The second aspect of the present invention provides a detection system for sorting wood materials or compressed wood based on moisture content based on the above detection line. Figure 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 configured according to the functions implemented by the above-mentioned detection line structure.

[0090] The measurement module includes:

[0091] Microwave moisture content measuring units are arranged at multiple locations along the axial direction of the wooden board for detection;

[0092] a weight measuring unit configured to measure the weight of the wooden board by means of a lifting weighing machine;

[0093] a width measuring unit, configured with an encoder mounted on a driving motor of the first chain conveyor belt, for measuring the width of the wood board while performing a first thickness measurement during radial transmission;

[0094] The length measuring unit is equipped with an encoder installed on the roller conveyor belt drive motor, which measures the second thickness and length of the wood board during axial transmission;

[0095] The thickness measuring unit includes 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.

[0096] The control module includes

[0097] A measuring module start-stop unit is configured on the microwave moisture content measuring unit and the weight measuring unit, wherein a photoelectric sensor is configured to detect the presence of the template and start the unit and stop the unit when the wooden board is not present;

[0098] A stopper unit is provided with a photoelectric sensor or a pressure sensor on the stoppers of the adjustment station and the third measurement station respectively 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;

[0099] Conveyor belt start-stop unit: photoelectric sensors are installed at the end of the conveyor belt and at each workstation to detect whether there is a wooden board. If there is, the conveyor starts conveying; if not, the conveyor stops conveying.

[0100] The storage module is configured to encode and store data corresponding to the measured moisture content, thickness, length, width and volume of each wood board;

[0101] The data processing module includes

[0102] 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;

[0103] The moisture content calculation unit calculates the specific gravity of the wood board according to the volume and weight of the wood board, and calculates the moisture content of the wood board in combination with the average moisture content of the wood board detected by microwaves.

[0104] An example of 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:

[0105] S1. Measure the weight of the wooden board;

[0106] S2. measuring the moisture content of multiple measuring points on the wood board and calculating the average moisture content;

[0107] S3, measuring the thickness of the wooden board at various positions along the radial direction using a first thickness measuring mechanism; when the wooden board passes the position of the first thickness measuring mechanism, measuring the width using an encoder;

[0108] 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 based on the thickness measured in step S2; when the wooden board passes the position of the second thickness measuring mechanism, using an encoder to measure the length;

[0109] S5, calculating the volume of the wooden board using the length, width, and thickness values ​​obtained in steps S3-S5;

[0110] S6. Calculate the specific gravity of the wood board according to the volume and weight of the wood board, and perform calculation based on the average moisture content in step S2 to calculate the corrected moisture content of the wood board.

[0111] 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.

[0112] The above technical solution is only one implementation method 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 timber for compacted wood or compacted 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 wood board and a second measuring portion connected to the downstream end of the first measuring portion and arranged along the axial direction of the wood board; The first measuring section is provided with a plurality of first chain conveyor belts installed parallel to the axial direction of the wooden board. The first chain conveyor belts are provided with a lifting clamping roller assembly and a width measuring mechanism corresponding to the first measuring station on the frame. The second measuring section includes a roller conveyor belt, and the downstream end of the roller conveyor belt is provided with a length measuring mechanism and a lifting clamping roller assembly. The lifting clamping roller assembly adopts a roller shaft that can be lifted and lowered and installed on the side of the conveyor belt, and a clamping roller installed on the roller shaft. The roller shaft is passively lifted and lowered, and the width measuring mechanism and the length measuring mechanism both use encoders installed on the drive motor of the corresponding conveyor belt.

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 is provided with a thickness measuring device; the thickness measuring device is a displacement sensor for measuring the moving distance of the roller shaft.

3. The detection line for sorting timber for compacted wood or compacted wood based on moisture content according to claim 2, characterized in that: The lifting clamping roller assembly includes a hollow tubular fixed shaft installed on the side frame of the conveyor belt, a connecting block installed in the fixed shaft and movable up and down, a roller connected to the side of 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. A longitudinal slide for the roller shaft to move up and down is provided on the side of the fixed shaft. The upper end of the connecting block is connected to the conveyor belt side frame at the upper end of the fixed shaft 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 at the lower end of the fixed shaft.

4. The detection line for sorting timber for compacted wood or compacted 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.

5. The detection line for sorting timber for compacted wood or compacted wood based on moisture content according to claim 4, characterized in that: The moisture content measuring mechanism includes several 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.

6. 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 provided 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 can be 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 to an inclined rod at the lower part of the end, the other end of the inclined rod is fixed to a rotating shaft, and both ends of the rotating shaft can be 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; The transfer roller belt includes a roller shaft and a plurality of rollers installed on the upper side of the roller shaft, and the upper surface of the roller is at the top surface of the roller shaft; the number of the transfer roller belts is the same as the number of conveyor belts of the first chain conveyor belt, and the transfer roller belts are respectively arranged on the downstream side of each conveyor belt of the first chain conveyor belt.

7. 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 in 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.

8. The detection line for sorting timber for compacted wood or compacted wood based on moisture content according to claim 7, characterized in that: A cutting section is provided upstream of the first chain conveyor belt, the cutting section comprising a second chain conveyor belt and a cutting machine, the downstream end 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 the outer side of the first chain conveyor belt corresponding to the adjustment station is provided with a pad, and a pusher is installed on the pad, and the pusher includes a pusher that extends toward the inside of the conveyor belt, and the position of the pusher in the retracted state is outside the horizontal line where the second chain conveyor belt is located.

9. 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 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.

10. A detection system for sorting compressed wood or compressed wood based on moisture content, applied to the detection line of claim 4, 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 measurement module includes Microwave moisture content measuring units are arranged at multiple locations along the axial direction of the wooden board for detection; a weight measuring unit configured to measure the weight of the wooden board by means of a lifting weighing machine; a width measuring unit, configured with an encoder mounted on a driving motor of the first chain conveyor belt, for measuring the width of the wood board while performing a first thickness measurement during radial transmission; The length measuring unit is equipped with an encoder installed on the roller conveyor belt drive motor, which measures the second thickness and length of the wood board 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 provided on the side of the clamping rollers for measuring the height of the clamping rollers; The control module includes A measuring module start-stop unit is configured on the microwave moisture content measuring unit and the weight measuring unit, wherein a photoelectric sensor is configured to detect the presence of the template and start the unit and stop the unit when the wooden board is not present; The stopper unit is equipped with a photoelectric sensor or a pressure sensor on the stopper of the adjustment station and the third measurement station to detect whether the wooden board exists. If the wooden board exists, the adjustment measurement of the corresponding station is performed and the stopper is closed. The stopper is opened after the wooden board is removed. Conveyor belt start-stop unit: photoelectric sensors are installed at the end of the conveyor belt and at each workstation to detect whether there is a wooden board. If there is, the conveyor starts conveying; if not, the conveyor stops conveying. The storage module is configured to encode and store data corresponding to the measured moisture content, thickness, length, width and volume of each wood 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 wood board according to the volume and weight of the wood board, and calculates the moisture content of the wood board in combination with the average moisture content of the wood board detected by microwaves.

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