A detection line and a detection system for selecting densified wood or densified wood materials based on moisture content

Abstract

A detection line is provided for selecting densified wood materials or densified wood based on the moisture content. 【Solution means】It includes a rack, and the rack includes a first measurement unit 1 that sets the conveyance direction along the radial direction of the wooden board and a second measurement unit 2 that is attached to the downstream end of the first measurement unit and sets the conveyance direction along the axial direction of the wooden board. The first measurement unit is provided with several sets of first chain-type conveyance belts 10, and a first thickness measurement mechanism 12 and a width measurement mechanism on the rack corresponding to the first chain-type conveyance belt are provided. The second measurement unit includes a roller-type conveyance belt 20, and a length measurement mechanism and a second thickness measurement mechanism 22 are provided at the downstream end of the roller-type conveyance belt. The first thickness measurement mechanism and the second thickness measurement mechanism include a lifting and clamping roller module and a thickness measuring device. Both the width measurement mechanism and the length measurement mechanism use an encoder attached to the drive motor of the conveyance belt. When the thickness measuring device receives a measurement signal, the encoder starts measuring the width or length of the wooden board.

Description

Technical Field

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

Background Art

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

[0003] The production line of high-frequency densified wood generally includes preheating equipment, high-frequency hot press machines, cooling equipment, etc. Some patents relate to moisture content measuring equipment. Patent Document 1 (May 28, 2019) discloses a moisture content measuring unit 8 (Figs. 7 and 8) located upstream of the production line of high-frequency densified wood. The microwave emission end 830 is provided at the bottom of the measurement holder 84, the microwave reception end 831 is provided on the conveying chain of the measurement segment 80, the measurement holder 84 can realize horizontal and vertical movement by a moving mechanism, and the moisture content measuring unit 8 can directly remove the wood 1 with unqualified moisture content from the production line. However, when detecting woods 1 with different lengths, the operator needs to move the measurement holder 84 in the length direction by the moving mechanism, and when detecting woods 1 with different widths, the operator needs to move the measurement holder 84 in the vertical direction by the moving mechanism. Therefore, in this patent, a large number of woods with different lengths or widths cannot be continuously and rapidly supplied, and there are also limitations in the length range and width range of the woods that can be detected by moving the measurement holder 84. Patent Document 2 (May 16, 2020) discloses a moisture content measuring instrument 77 (Fig. 10) located downstream of the production line of high-frequency densified wood. It measures the moisture content of the densified wood cured on the rotating holder and issues an alarm when the moisture content is not within the preset range. The rotating holder of this patent inevitably cannot continuously and rapidly supply and discharge a large number of woods with different lengths or widths, is not suitable for sorting, and the size of the wood receiving plate 740 is limited, and the redundancy of the wood size that each device can process is also small. Patent Document 3 (September 1, 2023) discloses a physical property detection system (Figs. 4 and 5) of densified wood manufacturing materials located upstream of the production line of high-frequency densified wood. It can measure the moisture content of the densified wood manufacturing materials conveyed on the conveying line 10. The carrier rack 30 is attached to the corresponding ends of the two guide arms 103 of the first conveying mechanism 101 on the conveying line 10. The carrier rack 30 includes two support segments 31 and two connecting segments 32 provided between the two support segments 31, and the interval between the upper and lower parts of the two connecting segments 32 is adjustable.Since the distance between the upper and lower parts of the two connecting parts 32 is adjustable, the redundancy of the thickness size of the lumber to be processed is increased. However, since the carrier rack 30 is directly attached to the conveying line, this patent is also suitable for detecting the moisture content of lumber with a predetermined length and width.

[0004] While the above moisture content measuring device cannot meet the application scenario of continuously and rapidly sorting a large number of lumbers (raw logs) with different lengths and widths, the above moisture content measuring device cannot meet the application scenario of continuously and rapidly sorting densified woods (finished products) with different moisture contents either. For example, when densified woods are further joined together, it is necessary to more precisely distinguish the moisture content.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] The object of the present invention is to solve the problems existing in the above prior art, and the present invention provides a detection line and a detection system for sorting densified wood lumber or densified wood based on the moisture content.

Means for Solving the Problems

[0007] The present invention is realized by the following technical solutions. A detection line for sorting densified wood lumber or densified wood based on the moisture content, including a rack, the rack including a first measurement unit for setting the conveying direction along the radial direction of the wooden board and a second measurement unit attached to the downstream end of the first measurement unit and setting the conveying direction along the axial direction of the wooden board. The first measurement unit has several sets of first chain-type conveyor belts mounted in parallel along the axial direction of the wooden board. An elevating clamping roller module and a width measuring mechanism are provided at the first measurement work station on the rack corresponding to the first chain-type conveyor belt. The second measurement unit includes a roller-type conveyor belt, and a length measuring mechanism and an elevating clamping roller module are provided at the downstream end of the roller-type conveyor belt. The elevating clamping roller module uses an elevating movable roller shaft mounted on the side of the conveyor belt and a clamping roller mounted on the roller shaft. The roller shaft is in passive elevating movement. Both the width measuring mechanism and the length measuring mechanism use an encoder mounted on the drive motor corresponding to the conveyor belt.

[0008] Preferably, a thickness measuring device is provided on the elevating clamping roller module. The thickness measuring device is a displacement sensor that measures the moving distance of the roller shaft.

[0009] Preferably, the elevating clamping roller unit module includes a hollow tubular fixed shaft mounted on the side frame of the conveyor belt, a connection block mounted inside the fixed shaft and capable of moving up and down, a roller shaft connected to the side of the connection block and extending outward to above the conveyor belt, and a clamping roller fitted on the outer end of the roller shaft. A vertical chute for moving the roller shaft up and down is opened on the side of the fixed shaft. The upper end of the connection block is connected to the side frame of the conveyor belt at the upper end inside the fixed shaft by an elastic connection member. The height from the lower surface of the clamping roller to the upper surface of the conveyor belt is smaller than the thickness of the wooden board. The thickness measuring device is a displacement sensor mounted at the lower end inside the fixed shaft.

[0010] Preferably, a moisture content measuring mechanism is provided at a second measurement work station on the rack corresponding to the first chain-type conveyor belt. The second measurement work station is provided upstream of the first measurement work station. A weight measuring mechanism is provided at a third measurement work station on the rack corresponding to the first chain-type conveyor belt. The third measurement work station is provided upstream of the second measurement work station. A stopper is provided at the downstream end of the third measurement work station.

[0011] Preferably, the moisture content measuring mechanism includes several microwave moisture content measuring devices provided between adjacent first chain-type conveyor belts. The microwave moisture content measuring devices include a microwave emitting antenna provided at the upper part on the side of the first chain-type conveyor belt and a microwave receiving end provided at the lower part on the side of the first chain-type conveyor belt. The weight measuring mechanism is a weighing scale attached between adjacent first chain-type conveyor belts using a lifting chassis.

[0012] Preferably, several book relay roller belts are provided between the rollers of the roller-type conveyor belt of the second measurement unit. The upper surface of the rollers of the relay roller belt is lower than the upper surface of the rollers of the roller-type conveyor belt. One end of the relay roller belt deviated from the first measurement unit is rotatably connected to the side frame of the roller-type conveyor belt. The other end extends to the downstream end of the chain-type conveyor belt and an inclined rod is hingedly connected to the lower part of this end. The other end of the inclined rod is fixed to a rotating shaft. Both ends of the rotating shaft are rotatably attached to the rack. The rotating shaft is connected to a rotating motor for driving. When the rotating shaft rotates, it moves the hinged connection end of the inclined rod upward. The upper surface of the roller at the hinged connection end of the relay roller belt is not lower than the upper surface of the chain-type conveyor belt. The relay roller belt includes a roller shaft and a plurality of rollers attached to the upper side of the side surface of the roller shaft. The upper surface of the roller is higher than the top surface of the roller shaft. The number of the relay roller belts is the same as the number of the conveyor belts of the first chain-type conveyor belt. The relay roller belts are provided in a one-to-one correspondence with the downstream side edges of the respective conveyor belts of the first chain-type conveyor belt.

[0013] Preferably, the number of the first chain-type conveyor belts is five, which are arranged on the side of the second measuring unit corresponding to the direction from the downstream to the upstream of the second measuring unit, and include a first conveyor chain, a second conveyor chain, a third conveyor chain, a fourth conveyor chain, and a fifth conveyor chain in sequence. The distance between the first conveyor chain and the second conveyor chain is 280 mm, the distance between the second conveyor chain and the third conveyor chain is 560 mm, the distance between the third conveyor chain and the fourth conveyor chain is 840 mm, and the distance between the fourth conveyor chain and the fifth conveyor chain is 840 mm.

[0014] Preferably, a material cutting part is provided upstream of the first chain-type conveyor belt. The material cutting part includes a second chain-type conveyor belt and a material cutting machine. The downstream of the second chain-type conveyor belt is attached to the upstream end of the first chain-type conveyor belt. The material cutting machine is a material cutting roller attached to both sides of the second chain-type conveyor belt. The conveyor belt corresponding to the second chain-type conveyor belt on the downstream side of the second measuring unit is located outside the horizontal line where the first conveyor chain is located. An adjustment work station is provided at the upstream part of the first chain-type conveyor belt. A stopper is provided at the downstream end of the adjustment work station. A pad is provided on the outer side of the first chain-type conveyor belt corresponding to the adjustment work station. A pusher is attached to the pad. The pusher includes a push hand that expands and contracts toward the inside of the conveyor belt. The push hand is located outside the horizontal line where the second chain-type conveyor belt is located in the retracted state position.

[0015] Preferably, the rack is further attached to the downstream end of the second measuring unit and includes a defective product sorting unit that sets the conveying direction along the axial direction of the wooden board, and an acceptable product sorting unit that is attached to the downstream end of the defective product sorting unit and sets the conveying direction along the axial direction of the wooden board. A roller conveyor belt is attached to both the defective product sorting unit and the acceptable product sorting unit. A third chain-type conveyor belt for outputting defective products is provided on one side of the defective product sorting unit, and a fourth chain-type conveyor belt for outputting acceptable products is provided on one side of the acceptable product sorting unit.

[0016] A second aspect of the present invention discloses a detection system for sorting densified wood or densified wood-based materials based on the moisture content based on the above detection line, including a measurement module, a control module connected to the measurement module, a data processing module connected to the measurement module, and a storage module. The measurement module A moisture content measurement unit using microwaves arranged to be installed and detected at a plurality of positions along the axial direction of the wooden board, A weight measurement unit arranged to measure the weight of the wooden board by an elevating weighing scale, An encoder attached to the first chain-type conveyor belt driving motor is arranged, and a width measurement unit that measures the width while performing the first thickness measurement when the wooden board is conveyed in the radial direction, An encoder attached to the roller-type conveyor belt driving motor is arranged, and a length measurement unit that measures the length while performing the second thickness measurement when the wooden board is conveyed in the axial direction, A thickness measurement unit including an elevating clamping roller arranged on the first chain-type conveyor belt and the roller-type conveyor belt respectively, and a displacement sensor provided on the side of the clamping roller to measure the height of the clamping roller. The control module A start / stop unit of the measurement module that arranges a photoelectric sensor in the moisture content measurement unit using microwaves and the weight measurement unit to start when detecting the presence of a template and stop when the wooden board is absent. A photoelectric sensor or a pressure sensor is respectively arranged on the stoppers of the adjustment work station and the third measurement work station to detect whether a wooden board exists. When it exists, the adjustment measurement of the corresponding work station is performed, the stopper is closed, and the stopper is opened after the wooden board is moved. There is also a stopper unit. A photoelectric sensor is arranged at the end of the conveyor belt and each work station to detect whether a wooden board exists. When it exists, the conveyor is started, and when it does not exist, the conveyor is stopped. It also includes a start / stop unit for the conveyor belt. The memory module is arranged to encode each wooden board and store the measured data of the corresponding moisture content, thickness, length, width, and volume. The data processing module There is a volume calculation unit arranged to calculate the volume of the corresponding wooden board based on the measured thickness, length, and width of the wooden board. It includes a moisture content calculation unit that obtains the specific gravity of the wooden board based on the volume and weight of the wooden board, combines it with the average value of the moisture content of the wooden board detected by microwave, and calculates the moisture content of the wooden board.

Advantages of the Invention

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

[0018] 1. The detection line of the present invention realizes the thickness measurement of each part of the wooden board by radial conveyance and axial conveyance in sequence, ensuring that the measured thickness value is accurate. On the other hand, the thickness measurement mechanism uses lifting clamping rollers to measure the thickness and at the same time activates an encoder to measure the numerical values of the corresponding running width side and length side, without the need to stop temporarily for measurement. It measures multi-data and at the same time ensures that the wooden board flows at high speed, realizing the continuous and high-speed measurement of the wooden board.

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

[0020] 3. The detection line of the present invention can realize continuously and rapidly measuring the thickness, weight, length, width and moisture content of a large number of logs or compacted woods with different size weights, improve the sorting efficiency and greatly improve the production efficiency. By measuring the total volume of the lot, the logs of the supplier can be directly accessed to the production line of high-frequency compacted wood, and the logs can be procured from the log supplier based on the total volume of the logs with qualified moisture content, so as to reduce the log storage space in the factory or avoid installing a storage space.

[0021] 4. The detection line of the present invention can also continuously and rapidly measure and mark the volume and moisture content of a single material, provide data such as moisture content and volume to subsequent processes such as high-frequency hot pressing in the production line of high-frequency compacted wood, and further can separately adjust the high-frequency hot pressing parameters for a single material in these subsequent processes. It is very suitable for continuously and rapidly sorting compacted woods (finished products) with different moisture contents and further manufacturing crosswise jointed board materials with compressed wood. It is disadvantageous to joint because the difference in moisture content between the two compacted woods before joint is too large.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 9

Embodiments for Carrying out the Invention

[0023] The detection line for sorting densified wood materials or densified wood based on the moisture content of the present invention is not limited to a high-frequency densification production line, and can be used in a steam densification production line, a wood-based panel production line, such as a density board, a particle board, a glued laminated timber, a laminated material, etc.

[0024] The detection line for sorting densified wood based on the moisture content of the present invention is arranged upstream of the production line of high-frequency densified wood in a plurality of embodiments, and it can be arranged in the same working place or different working places spatially from the production line of high-frequency densified wood in other segments downstream. The sorted wooden boards can be conveyed to the downstream line by automatic or semi-automatic conveying equipment. In some embodiments, the production line for sorting wood materials for densified wood based on the moisture content of the present invention is arranged upstream of a sequential sleeper type high-frequency densification production line.

[0025] The detection line for sorting densified wood based on the moisture content of the present invention is arranged downstream of the production line of high-frequency densified wood in a plurality of embodiments, and it can be arranged in the same working place or different working places spatially from the production line of high-frequency densified wood in other segments upstream.

[0026] The detection line for sorting based on the moisture content of the present invention can also be arranged in the middle of the production line of high-frequency densified wood according to different processes or requirements, that is, the production line for sorting high-frequency densified wood materials based on the moisture content of the present invention is not limited to being arranged upstream or downstream of the production line.

[0027] The term "lumber" in the present invention refers to raw wood boards obtained after pretreatment such as sawing and drying of wood boards.

[0028] The term "densified wood" in the present invention refers to a wood board with a higher density compared to the raw wood board obtained after the wood material has been processed such as preheating, hot pressing, and cooling.

[0029] The technical problems solved by the detection line for sorting densified wood lumber or densified wood based on the moisture content of the present invention are various. Based on the technical solutions, technical means, and technical features disclosed by the present invention, different technical problems can be solved based on different prior arts. Hereinafter, the present invention will be described in more detail with reference to the drawings.

[0030] FIG. 1 shows a detection line for sorting densified wood lumber or densified wood based on the moisture content, including a rack. The rack includes a first measuring unit 1 that sets the conveying direction along the radial direction of the wood board and a second measuring unit 2 that is connected to the downstream end of the first measuring unit 1 and sets the conveying direction along the axial direction of the wood board. The radial direction and the axial direction in the present invention are interpreted as the current radial direction and axial direction of the wood board.

[0031] A plurality of sets of first chain-type conveyor belts 10 are mounted in parallel along the axial direction of the wooden board in the first measuring unit. A lifting and clamping roller module and a width measuring mechanism are provided at the first measuring operation station 11 on the rack corresponding to the first chain-type conveyor belt 10. The second measuring unit 2 includes a roller-type conveyor belt 20, and a length measuring mechanism and a lifting and clamping roller module are provided at the downstream end of the roller-type conveyor belt 20. Both the width measuring mechanism and the length measuring mechanism use an encoder (not shown) attached to a drive motor corresponding to the conveyor belt. As shown in FIG. 2, the lifting and clamping roller module uses a liftable roller shaft 102 attached to the side of the conveyor belt and a clamping roller 103 attached to the roller shaft. The roller shaft adopts passive lifting 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 through the clamping roller, the width measuring mechanism and the length measuring mechanism start to measure the width or length of the wooden board. In addition, in order to better sense whether the wooden board reaches the measuring operation station, a photoelectric sensor may be attached to the corresponding measuring operation station, or a pressure sensor may be attached to the clamping roller. This structure realizes the measurement of the width and length by quickly performing the radial and axial conversions of the wooden board on the same detection line by positioning with the clamping roller, and realizes the high-speed and continuous measurement of a large number of wooden boards.

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

[0033] Based on the above clamping structure, the thickness measuring mechanism can be realized by being provided at a temporarily stopped measurement work station. In another preferred technical solution, the thickness measuring mechanism is provided at a lifting clamping module. In the detection line of the preferred solution described in FIG. 3, several sets of first chain-type conveyor belts 10 are installed in parallel along the axial direction of the wooden board at the first measurement unit 1. A first thickness measuring mechanism 12 and a width measuring mechanism are provided at the first measurement work station 11 on the rack corresponding to the first chain-type conveyor belt 10. The second measurement unit 2 includes a roller-type conveyor belt 20. A length measuring mechanism and a second thickness measuring mechanism 22 are provided at the downstream end of the roller-type conveyor belt 20.

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

[0035] The detection line enables the wooden board to achieve thickness measurement of each part through radial conveyance and axial conveyance in sequence, ensuring the accuracy of the measured thickness values. On the other hand, the thickness measurement mechanism uses lifting clamping rollers to perform thickness measurement and simultaneously activates an encoder to measure the corresponding width and length values of the running, and the entire wooden board is measured in a contact manner for thickness without the need to stop temporarily for measurement, ensuring that multi-data is measured while the wooden board flows at high speed, realizing continuous and high-speed measurement of the wooden board.

[0036] It should be noted that the rack of the present invention is provided with corresponding holders and support legs based on the structure of the conveyor belt. For example, a frame for installing the conveyor belt is provided, and the structure of each part is provided based on the actual situation of the conveyor belt.

[0037] In addition, the lifting and clamping roller module of the thickness measurement mechanism of the present invention ensures that the thickness of the wooden board is measured during conveyance, and the device can be improved based on the clamping roller structure. In one example, as shown in FIG. 4, the lifting and clamping roller module includes a fixed shaft 100 attached to the side frame of the conveyor belt, a connection block 101 movably attached to the fixed shaft 100, a roller shaft 102 connected to the connection block 101 and extending outwardly above the conveyor belt, and a clamping roller 103 fitted to the outer end of the roller shaft 102. The upper end or the lower end of the connection block 101 is connected to the side frame of the conveyor belt by an elastic connection member 104. The elastic connection member can use a return spring. The height from the lower surface of the clamping roller 103 to the upper surface of the conveyor belt is smaller than the thickness of the wooden board. The thickness measuring device is a displacement sensor 105 attached to the upper end or the lower end of the fixed shaft 100, and 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 with a tubular structure. A chute 106 is opened along the longitudinal direction on one side of the fixed shaft. The elastic connection member 104 is built into the inner top end of the fixed shaft 100, and the bottom is connected to the connection block 101. The displacement sensor 105 is attached to the bottom inside the tube of the fixed shaft 100. Of course, based on this principle, the connection block may be further provided in a ring structure externally fitted to the fixed shaft, and the elastic connection member and the displacement sensor may be provided externally, and passive lifting can be realized in the same way. During use, the displacement sensor checks the position change of the clamping roller, detects the thickness of the wooden board based on the displacement distance of the clamping roller. The first thickness measurement mechanism measures the thickness of the width side of the wooden board, and the second thickness measurement mechanism measures the thickness of the long side of the wooden board. The flatness of the wooden board can be inspected, and the average thickness of the wooden board can also be calculated after data processing, ensuring the accuracy of the moisture content calculation in the later stage.

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

[0039] The moisture content measurement mechanism 19 includes several microwave moisture content measurement devices 86 provided between the adjacent first chain-type conveyor belts 10. The microwave moisture content measurement device 86 includes a microwave emission antenna provided at the upper part on the side of the first chain-type conveyor belt 10 and a microwave reception end provided at the lower part on the side of the first chain-type conveyor belt 10. The weight measurement mechanism 17 is a weighing scale attached between the adjacent first chain-type conveyor belts 10 using a lifting chassis.

[0040] The moisture content measuring mechanism of the present invention uses the microwave method to detect the moisture content of the wooden board. When the wooden board passes through the moisture content measuring device using microwaves in the radial direction, the device quickly acquires the moisture content data of multiple measurement points in the radial direction of the wooden board, calculates the average value of the multiple measurement values, and uses it as the moisture content (average moisture content) of the corresponding wooden board. The principle of detecting the moisture content of the wooden board by the microwave method is as follows. In the frequency band of microwaves, the dielectric constant of water is much larger than that of general materials, and the water dipole frequently reverses and consumes a large amount of electrical energy. Therefore, when microwaves penetrate the moisture content semi-finished product, the microwave energy loss caused by moisture is much larger than the loss caused by other dry substances. The moisture content in the semi-finished product significantly affects its dielectric constant. By measuring the attenuation of microwave energy, the moisture content of the wooden board can be estimated. During the scanning process, the microwaves are incident perpendicular to the surface of the object to be measured. If the moisture content of the member to be measured is greater than the moisture content of the completely dry test member, significant changes will occur in the basic parameters of the transmitted wave, such as amplitude and phase, thereby realizing the quantitative detection of the moisture content of the wooden board. According to the description of the prior art, the moisture content measuring device includes a microwave emission end and a microwave reception end, and also includes a detection program that activates the device when the optoelectronic sensor senses the wooden board. This belongs to the prior art in this field and will not be specifically described here.

[0041] The measured value of the microwave moisture meter has a high correlation with the actual moisture content of the object to be measured. However, the moisture content (%) is affected by the change in the specific gravity of the object to be measured. For wooden boards with inconsistent specific gravity, its measurement accuracy decreases. In addition to directly detecting and obtaining the moisture content of the wooden board, the present invention further performs moisture content correction using the method of "detecting the average value of the moisture content based on collection correction". This method refers to the calculation method of Japanese Patent Application P2001-124707A (May 11, 2001). The final moisture content η = W s / (ω - W s ) × 100 (%), where ω = W1 / S, (In the formula, η represents the moisture content, W s represents the moisture content of the reference volume (SK) for each wooden board, ω represents the specific gravity of the wooden board, W 1W represents the total weight, and S represents the volume. As is clear from this formula, the moisture content η of the wooden board is calculated from the moisture content WS per unit reference volume of the wooden board and the specific gravity ω. For wooden boards with a non-constant specific gravity, the moisture content η with high measurement accuracy can be obtained by this method. Based on this principle, the present invention redesigns the detection line of the wooden board, sets a continuous and high-speed measurement function for a large number of logs or compacted woods, and includes the measurement and data processing of the volume of the wooden board, that is, includes the high-speed and accurate measurement of the thickness, length, and width of the wooden board. Calculate the product of the thickness, width, and length to obtain the volume, and the volume is an abbreviation of "wooden board volume".

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

[0043] In order to further improve the high-speed measurement in the flow line of a large number of wooden boards, the radial conveyance of the wooden boards is converted into axial conveyance for two measurements. In the present invention, a relay roller belt is provided to ensure that the wooden boards do not stop during the relay process. Specific examples are as follows. As shown in FIG. 5, several relay roller belts 200 of books are provided between the rollers of the roller conveyor belt 20 of the second measuring unit 2. The upper surface of the rollers of the relay roller belt 200 is lower than the upper surface of the rollers of the roller conveyor belt 20. One end of the relay roller belt 200 that is offset from the first measuring unit 1 is rotatably connected to the side frame of the roller conveyor belt 20. The other end extends to the downstream end of the chain conveyor belt 10, and an inclined rod 201 is hinged to the lower part of this end. The other end of the inclined rod 201 is fixed to a rotating shaft 202. Both ends of the rotating shaft 202 are rotatably attached to the racks of the corresponding conveyor belts. The rotating shaft 202 is connected to a rotating motor for driving. When the rotating shaft 202 rotates, it moves the hinged connection end of the inclined rod 201 upward, and the upper surface of the roller at the hinged connection end of the relay roller belt 200 is not lower than the upper surface of the chain conveyor belt 10. Thereby, the chain conveyor belt relays the wooden boards to the relay roller belt, and further conveys them from the relay roller belt to the roller conveyor belt. When the conveyance is completed, the roller conveyor belt is started to convey the wooden boards axially.

[0044] The detection line of the present invention has high production efficiency and can continuously and rapidly select timber or densified wood with different lengths and widths, thereby improving the selection efficiency. In the corresponding technical solution, as shown in FIG. 3, the number of the first chain-type conveyor belts is provided to be 5, and they are arranged on the side of the second measuring unit corresponding to the direction from the downstream to the upstream of the second measuring unit, 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 280 mm, the distance between the second conveyor chain and the third conveyor chain is 560 mm, the distance between the third conveyor chain and the fourth conveyor chain is 840 mm, and the distance between the fourth conveyor chain and the fifth conveyor chain is 840 mm. The outer end of the relay roller belt downstream of the first chain-type conveyor belt is arranged on the side of the downstream end of the corresponding conveyor chain. Therefore, the number of the relay roller belts is equivalent to that of the first chain-type conveyor belt, or slightly increases or decreases as required. Naturally, the number of the conveyor belts and the number of the relay roller belts of the present invention can both increase or decrease according to the actual situation of the wooden board, and are adaptable to more scenarios.

[0045] In a specific example, when the length of the board is 600 mm, the number of conveyor chains is 2 and the number of relay roller belts is 2. When the length of the board is greater than 600 mm and less than 1120 mm (560 mm + 560 mm) (it may be 1000 mm (160 mm + 260 mm + 560 mm)), the corresponding parameters are adjusted, and the description is omitted here. In this case, the number of conveyor chains is 3 and the number of relay roller belts is 2. When the length of the board is 1120 mm or more and less than 1680 mm, the number of conveyor chains is 3 and the number of relay roller belts is 3. When the length of the board is 1680 mm or more and less than 2520 mm, the number of conveyor chains is 4 and the number of relay roller belts is 4. When the length of the board is 2520 mm or more and 3000 mm or less, the number of conveyor chains is 4 and the number of relay roller belts is 5.

[0046] Also, as can be seen from the above solution means, the moisture content measuring device using microwaves is provided between the adjacent first chain-type conveyor belts 10. In a specific example, the moisture content measuring device using microwaves includes four, namely, the moisture content measuring device 86-1 using microwaves, the moisture content measuring device 86-2 using microwaves, the moisture content measuring device using microwaves, and the moisture content measuring device 86-4 using microwaves from left to right. As shown in FIG. 1, in the first chain-type conveyor, they are the first conveyor chain, the second conveyor chain, the third conveyor chain, the fourth conveyor chain, and the fifth conveyor chain from left to right, and in the relay roller belt, they are the relay roller belt 1, the relay roller belt 2, the relay roller belt 3, the relay roller belt 4, and the relay roller belt 5 from left to right.

[0047] For a plate with a length less than 600 mm (critical value, preset according to the production situation), the moisture content gauge antenna 86 using any microwave is arranged so as not to be activated (manually or automatically).

[0048] For a plate equal to 600 mm (straddling the first conveyor chain and the second conveyor chain and straddling the relay roller belt 1 and the relay roller belt 2), the moisture content measuring equipment 86-1 using microwaves is arranged to be activated.

[0049] For a plate with a length greater than 600 mm and less than 1120 mm (560 mm + 560 mm) (straddling the first conveyor chain, the second conveyor chain, and the third conveyor chain and straddling the relay roller belt 1 and the relay roller belt 2), the moisture content measuring equipment 86-1 using microwaves and the moisture content measuring equipment 86-2 using microwaves are arranged to be activated.

[0050] For a board with a length of 1120 mm or more and less than 1680 mm (spanning the first conveyor chain, the second conveyor chain, and the third conveyor chain, and also spanning the relay roller belts 1, 2, and 3), the moisture content measuring equipment 86-1, 86-2, and 86-3 using microwaves are arranged to be activated.

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

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

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

[0054] The stopper of the present invention is a rotating structure or a lifting structure with a baffle. Specifically, a plurality of baffles are provided on the same rod body. As shown by the number 18 in FIG. 3, the baffles are provided corresponding to the space between adjacent conveyor belts. When it is necessary to stop the wooden board, the baffles are stopped in front of the conveying position by rotating or lifting, and when it is not necessary to stop, the baffles are moved from the conveying position by rotating or lifting.

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

[0056] One side of the conveying chain of the second chain-type conveying belt 30 is located outside the horizontal line where the first chain-type conveying belt 10 is located. In addition, as shown in FIG. 6, the conveying chain on the left side of the second chain-type conveying belt 30 is located outside the horizontal line on the left side of the first chain-type conveying belt 10, and there is a space for the wooden board to move to the right reference position when it is conveyed from the second chain-type conveying belt 30 to the first chain-type conveying belt 10. Specifically, an adjustment work station 111 is provided at the upstream part of the first chain-type conveying belt 10, a stopper 18-1 is provided at the downstream end of the adjustment work station 111, a pad 112 is provided on the outer side (left side in the figure) of the first chain-type conveying belt 10 corresponding to the adjustment work station 111, a pusher 113 is attached to the pad 112, the pusher 113 includes a push hand 114 that expands and contracts toward the inside of the conveying belt, and the push hand 114 is located outside the horizontal line where the second chain-type conveying belt 30 is located in the contracted state position. The wooden board (600 mm to 3000 mm) is pushed to the target position by the pusher, ensuring accurate measurement of the wooden board within the section range. After the wooden board of any length is pushed by the pusher at a certain distance by the pusher installed on this side, it always moves to the standard work station.

[0057] The operation flow is as follows. After the wooden board is conveyed from the second chain-type conveying belt 30 to the first chain-type conveying belt 10, it continues to be conveyed. After the wooden board reaches the adjustment work station, it is stopped by the stopper. At this time, the first chain-type conveying belt 10 stops running. At this stage, a lifting tray can be provided between the conveying belts to lift the wooden board higher than the conveying belt. The push hand 114 of the pusher pushes the wooden board to the target position, and each measurement can be performed at the accurate measurement work station in the subsequent conveying process of the wooden board. After the wooden board is adjusted to the predetermined position, the lifting tray descends to drop the wooden board onto the conveying belt, the stopper rotates and opens, and the first chain-type conveying belt runs again to continue conveying.

[0058] Any wooden board of any length can be self - adaptively adjusted to the measurement work station by the above - mentioned adjustment work station, simplifying the pretreatment process. Naturally, in addition to the above - mentioned adjustment work station structure, other technical solutions can be used. In another improvement example, as shown in FIG. 7, an adjustment work station is provided at the upstream of the first chain - type conveyor belt 10. A stopper is provided at the downstream end of the adjustment work station. A stopper pad 116 for aligning with the left side of the measurement work station is provided on the left side of the first chain - type conveyor belt 10 corresponding to the adjustment work station. A pusher 113 - 1 is provided on the other side corresponding to the adjustment work station. The pusher 113 - 1 includes a push hand 114 - 1 that expands and contracts toward the inside of the conveyor belt. After the wooden board is conveyed to the first chain - type conveyor belt 10 and reaches the adjustment work station, it is stopped by the stopper. At this time, the first chain - type conveyor belt 10 stops running. At this stage, a lifting tray is further provided between the conveyor belts to lift the wooden board higher than the conveyor belt. The push hand 114 - 1 of the pusher pushes the wooden board to the stopper pad 116, and each measurement can be performed at an accurate measurement work station in the subsequent conveying process of the wooden board. After the wooden board is adjusted to a predetermined position, the lifting tray descends to drop the wooden board onto the conveyor belt, the stopper rotates and opens, and the first chain - type conveyor belt runs again to continue conveying.

[0059] In yet another improved example of the present invention, as shown in FIG. 8, the rack is further attached to the downstream end of the second measuring unit 20 and includes a sorting unit 40 for NG products that sets the conveying direction along the axial direction of the wooden board, and an OK product sorting unit 50 that is attached to the downstream end of the NG product sorting unit 40 and sets the conveying direction along the axial direction of the wooden board. Roller conveyor belts are attached to both the NG product sorting unit 40 and the OK product sorting unit 50. A third chain-type conveyor belt 41 for outputting NG products is provided on one side of the NG product sorting unit 40, and a fourth chain-type conveyor belt 51 for outputting OK products is provided on one side of the OK product sorting unit 50. Naturally, when the wooden board is transferred from the sorting unit to the chain-type conveyor belt, it is necessary to convert the angle. Therefore, it is similarly necessary to provide a relay roller belt on the roller conveyor belt of the sorting unit to achieve this. The structure of the relay roller belt is the same as the structure provided in the second measuring unit, and the description here is omitted. Lifting shutters 43 and 53 are provided at the downstream ends of the roller conveyor belts of the NG product sorting unit 40 and the OK product sorting unit 50, which determine whether the wooden board is an NG product or an OK product based on the current measurement information of the wooden board, drive the baffle corresponding to the conveyor belt to rise and stop, and transfer it to the corresponding optional conveyor belt.

[0060] The present invention can continuously and rapidly sort a large number of lumber or compacted wood with different lengths and widths based on the average moisture content of the wooden board, and the average moisture content is the average value of the measured moisture content or the average value of the detected moisture content based on volume correction. The purpose of continuous and rapid sorting is to improve the production efficiency of the entire production line of high-frequency compacted wood and the quality of the products.

[0061] The present invention can continuously and rapidly measure the moisture content, weight, thickness, width, and length of a large number of lumber or compacted wood, greatly improving the production efficiency. While improving the sorting efficiency by continuously and rapidly sorting lumber or compacted wood with different lengths and widths, it measures the total volume of the lot to directly allow the supplier's lumber to access the production line of high-frequency compacted wood, orders from the lumber supplier based on the total volume of the lumber with qualified moisture content, and can reduce the factory's lumber storage space or avoid installing a storage space.

[0062] In order to improve the quality of the product, based on continuously and rapidly measuring and marking the volume and moisture content of a single material, data such as moisture content and volume are provided to subsequent processes such as high-frequency hot pressing in the production line of high-frequency densified wood, and further, high-frequency hot pressing parameters (high-frequency frequency, heating time and interval time, dielectric constant, compression ratio, compression time and interval time, etc.) of a single material can be adjusted individually in these subsequent processes. On the other hand, it is very suitable for continuously and rapidly sorting densified wood (finished products) with different moisture contents and further manufacturing crosswise joined board materials from compressed wood. However, it is disadvantageous to join them because the difference in moisture content between the two pieces of densified wood before joining is too large.

[0063] An example of the second aspect of the present invention provides a detection system for sorting densified wood lumber or densified wood based on the moisture content based on the above detection line. As shown in FIG. 9, it includes a measurement module, a control module connected to the measurement module, a data processing module connected to the measurement module, and a storage module. Each module is provided according to the functions realized by the above detection line structure.

[0064] The measurement module a microwave moisture content measurement unit arranged to be installed and detected at a plurality of positions along the axial direction of the wooden board; a weight measurement unit arranged to measure the weight of the wooden board by a lifting weighing scale; a width measurement unit arranged with an encoder attached to the first chain-type conveyor belt drive motor to perform the first thickness measurement and measure the width simultaneously when the wooden board is conveyed in the radial direction; a length measurement unit arranged with an encoder attached to the roller-type conveyor belt drive motor to perform the second thickness measurement and measure the length simultaneously when the wooden board is conveyed in the axial direction; a thickness measurement unit including lifting clamping rollers respectively arranged on the first chain-type conveyor belt and the roller-type conveyor belt and a displacement sensor provided on the side of the clamping roller to measure the height of the clamping roller. The control module is a start / stop unit of a measurement module that starts when a photoelectric sensor is arranged on the moisture content measurement unit and the weight measurement unit using microwaves to detect the presence of a template and stops when there is no wooden board, is a stopper unit that respectively arranges a photoelectric sensor or a pressure sensor on the stoppers of the adjustment work station and the third measurement work station to detect whether a wooden board exists, performs adjustment measurement of the corresponding work station when it exists, closes the stopper, and opens the stopper after the wooden board is moved, and includes a start / stop unit of a conveyor belt that arranges photoelectric sensors at the ends of the conveyor belt and at each work station to detect whether a wooden board exists, starts the conveyance when it exists, and stops the conveyance when it does not exist, The storage module is arranged to encode each wooden board and store the measured corresponding data of moisture content, thickness, length, width, and volume, The data processing module includes a volume calculation unit arranged to calculate the volume of the corresponding wooden board based on the measured thickness, length, and width of the wooden board, and a moisture content calculation unit that obtains the specific gravity of the wooden board based on the volume and weight of the wooden board, and combines it with the average value of the moisture content of the wooden board detected by microwaves to calculate the moisture content of the wooden board.

[0065] An example of the third aspect of the present invention discloses a detection method for selecting densified wood for use or densified wood based on moisture content, Step S1 of measuring the weight of the wooden board, Step S2 of measuring the moisture content at a plurality of measurement points of the wooden board and calculating the average value of the moisture content, Step S3 of measuring the thickness at each position along the radial direction of the wooden board with a first thickness measurement mechanism and measuring the width using an encoder when the wooden board passes through the position of the first thickness measurement mechanism, Step S4 of measuring the thickness at each position along the axial direction of the wooden board with a second thickness measurement mechanism, combining the thickness in Step S2 to calculate the average value, and measuring the length using an encoder when the wooden board passes through the position of the second thickness measurement mechanism, Step S5 of calculating the volume of the wooden board using the numerical values of the length, width, and thickness of steps S3 - S5, Step S6 of obtaining the specific gravity of the wooden board based on the volume and weight of the wooden board, combining and calculating it with the average value of the moisture content in step S2, and calculating the corrected moisture content of the wooden board. It includes.

[0066] Note that the specific correction algorithm for the moisture content of the wooden board refers to the calculation method of Japanese Patent Application P2001 - 124707A (May 11, 2001), and the final moisture content η = W s / (ω - W s )×100(%), where ω = W1 / S. In the formula, η represents the moisture content, W s represents the moisture content of the reference volume (SK) per wooden board, ω represents the specific gravity of the wooden board, W 1 represents the total weight, and S represents the volume. The present invention considers a detection line that realizes continuous and high - speed measurement of a large number of wooden boards, and corrects the moisture content based on the detection data of the detection line.

[0067] The above technical solution is only one embodiment of the present invention. A person skilled in the art can easily make various improvements or modifications on the basis of the disclosed principle of the present invention, and is not limited to the technical solution described in the above - mentioned specific embodiment of the present invention. Therefore, the foregoing is only a preferred one and does not have a limiting meaning.

Claims

1. a rack, the rack including a first measuring section that sets a conveying direction along a radial direction of the wooden board, and a second measuring section that is attached to a downstream end of the first measuring section and sets a conveying direction along an axial direction of the wooden board; The first measuring section has several sets of first chain-type conveying belts mounted in parallel along the axial direction of the wooden board, and a first measuring work station on a rack corresponding to the first chain-type conveying belt is provided with an elevation-type clamping roller module and a width measuring mechanism; the second measuring section includes a roller-type conveying belt, and a length measuring mechanism and an elevation-type clamping roller module are provided at the downstream end of the roller-type conveying belt; The lifting type pinch roller module uses a roller shaft that can be lifted and moved and that is attached to the side of the conveyor belt, and a pinch roller attached to the roller shaft, and the roller shaft is a passive lifting type, and both of the width measuring mechanism and the length measuring mechanism use an encoder attached to the driving motor corresponding to the conveyor belt. A detection line for sorting lumber for compaction or compacted wood based on moisture content.

2. The lifting type pinch roller module is provided with a thickness gauge, which is a displacement sensor that measures the moving distance of the roller shaft. A detection line for sorting timber for compaction or compacted wood based on the moisture content as claimed in claim 1.

3. The lifting type clamping roller unit module includes a hollow tubular fixed shaft attached to a side frame of the conveyor belt, a connection block attached within the fixed shaft and movable up and down, a roller shaft connected to the side of the connection block and extending outward to above the conveyor belt, and a clamping roller fitted to the outer end of the roller shaft, a vertical chute for moving the roller shaft up and down is opened on the side of the fixed shaft, an upper end of the connection block is connected to the side frame of the conveyor belt at the upper end within the fixed shaft by an elastic connection member, the height from the lower surface of the clamping roller to the upper surface of the conveyor belt is smaller than the thickness of the wooden board, and the thickness measuring device is a displacement sensor attached to the lower end within the fixed shaft. A detection line for selecting lumber for compaction or compacted wood based on the moisture content as claimed in claim 2.

4. A moisture content measuring mechanism is provided at a second measuring work station on a rack corresponding to the first chain type conveying belt, the second measuring work station being provided upstream of the first measuring work station, a weight measuring mechanism is provided at a third measuring work station on a rack corresponding to the first chain type conveying belt, the third measuring work station being provided upstream of the second measuring work station, and a stopper is provided at a downstream end of the third measuring work station. A detection line for sorting timber for compaction or compacted wood based on the moisture content as claimed in claim 1.

5. The moisture content measuring mechanism includes several microwave moisture content measuring devices installed between adjacent first chain type conveyor belts, and the microwave moisture content measuring devices include a microwave emission antenna installed at an upper portion of the first chain type conveyor belt side and a microwave receiving end installed at a lower portion of the first chain type conveyor belt side, and the weight measuring mechanism is a weighing scale installed between adjacent first chain type conveyor belts using a lifting chassis. A detection line for sorting timber for compaction or compacted wood on the basis of the moisture content according to claim 4.

6. a plurality of intermediate roller belts are provided between the rollers of the roller-type conveyor belt of the second measuring section, the upper surface of the roller of the intermediate roller belt is lower than the upper surface of the roller of the roller-type conveyor belt; one end of the intermediate roller belt offset from the first measuring section is rotatably connected to a side frame of the roller-type conveyor belt, the other end extends to the downstream end of the chain-type conveyor belt and a diagonal rod is hinged to the lower part of the end; the other end of the diagonal rod is fixed to a rotating shaft, both ends of the rotating shaft are rotatably attached to a rack, the rotating shaft is connected to a rotating motor for driving, and when the rotating shaft rotates, the hinge connection end of the diagonal rod is moved to move upward, and the upper surface of the roller of the hinge connection end of the intermediate roller belt is not lower than the upper surface of the chain-type conveyor belt; The relay roller belt includes a roller shaft and a plurality of rollers attached to the upper side of the roller shaft, the upper surface of the roller is higher than the top surface of the roller shaft, the number of the relay roller belts is the same as the number of the conveyor belts of the first chain type conveyor belt, and the relay roller belts are provided in one-to-one correspondence with the downstream side of each conveyor belt of the first chain type conveyor belt. A detection line for sorting timber for compaction or compacted wood based on the moisture content as claimed in claim 1.

7. The number of the first chain type conveyor belts is five, and they are arranged on the side of the second measuring section in a direction from downstream to upstream of the second measuring section, and include a first conveyor chain, a second conveyor chain, a third conveyor chain, a fourth conveyor chain and a fifth conveyor chain in that order. The interval between the first conveyor chain and the second conveyor chain is 280 mm, the interval between the second conveyor chain and the third conveyor chain is 560 mm, the interval between the third conveyor chain and the fourth conveyor chain is 840 mm, and the interval between the fourth conveyor chain and the fifth conveyor chain is 840 mm. A detection line for sorting timber for compaction or compacted wood based on the moisture content as claimed in claim 1.

8. a material cutting section is provided upstream of the first chain-type conveying belt, the material cutting section includes a second chain-type conveying belt and a material cutting machine, the downstream of the second chain-type conveying belt is attached to the upstream end of the first chain-type conveying belt, and the material cutting machine is a material cutting roller attached to both sides of the second chain-type conveying belt; The conveyor belt corresponding to the second chain type conveyor belt downstream of the second measuring unit is located outside the horizontal line on which the first conveyor chain is located, an adjustment work station is provided on the upstream side of the first chain type conveyor belt, a stopper is provided at the downstream end of the adjustment work station, a pad is provided on the outer side of the first chain type conveyor belt corresponding to the adjustment work station, a pusher is attached to the pad, the pusher includes a push hand that expands and contracts toward the inside of the conveyor belt, and the push hand is located outside the horizontal line on which the second chain type conveyor belt is located in a contracted position. A detection line for sorting timber for compaction or compacted wood based on the moisture content as claimed in claim 7.

9. The rack further includes a NG product sorting section that is attached to the downstream end of the second measuring section and sets the conveying direction along the axial direction of the wooden board, and a OK product sorting section that is attached to the downstream end of the NG product sorting section and sets the conveying direction along the axial direction of the wooden board, both of the NG product sorting section and the OK product sorting section are equipped with roller conveyor belts, a third chain type conveyor belt is provided on one side of the NG product sorting section for outputting NG products, and a fourth chain type conveyor belt is provided on one side of the OK product sorting section for outputting OK products. A detection line for sorting timber for compaction or compacted wood based on the moisture content as claimed in claim 1.

10. a measurement module, a control module connected to the measurement module, a data processing module and a storage module connected to the measurement module, The measurement module includes: A microwave moisture content measuring unit arranged to be installed at multiple positions along the axial direction of the wooden board for detection; a weight measuring unit arranged to measure the weight of the wooden board by a lifting weighing scale; a width measuring unit that measures the width of the wooden board while measuring the first thickness of the wooden board when the wooden board is conveyed in the radial direction by disposing an encoder attached to the first chain type conveying belt drive motor; a length measuring unit that measures the length of the wooden board while performing a second thickness measurement, by disposing an encoder attached to a roller-type conveyor belt drive motor and conveying the wooden board in the axial direction; a thickness measuring unit including a lifting type pinch roller disposed on the first chain type conveying belt and the roller type conveying belt, and a displacement sensor disposed on the pinch roller side to measure the height of the pinch roller, The control module includes: a start / stop unit for the measuring module, which is provided with a photoelectric sensor in the moisture content measuring unit and the weight measuring unit using microwaves, and starts when it detects the presence of a template and stops when the wooden board is not present; a stopper unit that detects whether a wooden board is present by disposing a photoelectric sensor or a pressure sensor on the stopper of the adjustment work station and the third measurement work station, and performs adjustment measurement of the corresponding work station when the wooden board is present, closes the stopper, and opens the stopper after the wooden board is transferred; A conveyor belt start / stop unit that detects whether or not a wooden board is present by arranging photoelectric sensors at the end of the conveyor belt and at each work station, starts conveyance when a wooden board is present, and stops conveyance when a wooden board is not present; the memory module is configured to encode each wooden board and store corresponding measured moisture content, thickness, length, width and volume data; The data processing module includes: a volume calculation unit arranged to calculate a volume of the corresponding wooden board based on the measured thickness, length and width of the wooden board; and a moisture content calculation unit for calculating the specific gravity of the wooden board based on the volume and weight of the wooden board, and calculating the moisture content of the wooden board by combining the specific gravity with the average moisture content of the wooden board detected by the microwave. A detection system for sorting timber or wood based on moisture content applied to a detection line according to claim 4.

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