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109 results about "Felling" patented technology

Felling is the process of cutting down individual trees, an element of the task of logging. The person cutting the trees is a feller.

Forest industry chain multi-modal data intelligent processing method and system

The invention provides an intelligent processing method and system for multi-modal data of an industrial chain of the forest industry, and relates to the technical field of data processing. According to the method, acquisition nodes are arranged in links of seedling raising, planting, tending, felling, transportation, processing, storage and sales, and three types of original data of images, sensors and texts are obtained; forming a time-space aligned image feature, sensor feature and text feature set through unified time correction, space coordinate conversion, anomaly elimination, deletion interpolation and normalization; and further mapping the three types of features to the same feature space by adopting a unified coding mechanism, and constructing a knowledge graph by combining space-time diagram modeling and a forest ontology library to obtain multi-modal fusion feature representation. According to the invention, a high-consistency and extensible data basis is provided for forestry full-life-cycle digital management.
Owner:GUANGXI ACAD OF SCI

Modularized bionic climbing robot and multi-target continuous operation method thereof

The invention relates to a modular bionic climbing robot and a multi-target continuous operation method thereof. The invention relates to a climbing robot simulating inchworm motion, in particular to a modular bionic climbing robot which is suitable for operations such as bamboo forest felling, forest pruning and tower inspection. The robot comprises a posture adjusting module, a self-adaptive clamping module, a replaceable tail end operation module and a visual navigation module. A battery is arranged in the posture adjusting module and supplies power through wiring of the arm body. The robot climbs, descends and transversely rotates along the rod through the pitching joint and the yawing joint. Based on the inchworm motion principle, the two clamping modules work alternately, and continuous transfer operation is achieved. When the distance between every two adjacent bamboo stalks is not larger than the arm span, multi-target continuous felling can be automatically completed, efficiency is remarkably improved, and cost is reduced.
Owner:ZHEJIANG FORESTRY UNIVERSITY

Fan blade ultrathin and deformation-resistant material structure

The utility model discloses a fan blade ultrathin and deformation resistant material structure which comprises a fan blade plate, the fan blade plate comprises a first wood layer plate, a second wood layer plate, a wood middle layer plate, a third wood layer plate and a fourth wood layer plate, the wood middle layer plate is connected between the second wood layer plate and the third wood layer plate, and the fourth wood layer plate is connected between the second wood layer plate and the third wood layer plate. Therefore, the first wood layer plate, the second wood layer plate, the wood middle layer plate, the third wood layer plate and the fourth wood layer plate are sequentially connected to form the fan blade plate. According to the fan blade, the strength of the fan blade plate is enhanced through the combination mode of the multiple layers of wood of the ultra-thin and anti-deformation material structure, the situation that the fan blade is deformed or broken due to weather or other external force is avoided, and therefore the stability of the fan is improved, wind resistance is reduced, the rotating efficiency of the fan blade is improved, and meanwhile the wood cutting amount is reduced by more than 30%. At present, a new structure with the thickness of about 4.2 mm can replace an old structure with the thickness of 5.4 mm. The new structure with the thickness of about 5.4 mm can replace the old structure with the thickness of 7.2 mm.
Owner:ZHONGSHAN XINGMAO WOOD IND CO LTD

Device and method for felling a tree, vehicle

ActiveDE102019135035B4ForestryTree rootTree trunk
The invention relates to a device and a method for felling a tree, comprising movable gripping arms (22, 24) for grasping a tree trunk (4) and at least one felling tool (42) for acting on the tree trunk (4). According to the invention, two rear gripping arms (24) and two front gripping arms (22) arranged opposite the rear gripping arms (24) are provided and arranged and movable in such a way that the rear gripping arms (24) and the front gripping arms (22) act against each other with respect to an axis of the tree trunk (4) and can align the tree trunk (4) in a position in which the at least one felling tool (42) can make a felling cut at the intended depth relative to the diameter of the tree trunk (4), with which the tree trunk (4) is separated from the root to such an extent that a hinge remains.The invention also relates to a vehicle comprising a movable crane boom with which a device for felling a tree can be carried in a pendulum-like manner and positioned on a tree trunk.
Owner:PFANZELT MASCHENBAU

Methods, systems, and storage media for calculating the area of ​​tree felling along the diversion lines of high-voltage overhead transmission lines.

PendingCN122368375ASoil scienceTree topping
This invention provides a method, system, and storage medium for calculating the tree felling range of a high-voltage overhead transmission line's diversion line. This method can more accurately adapt to the spatial morphology of the diversion line, integrate a digital elevation model to achieve terrain-adaptive clearance calculation, and take into account both the natural growth height of trees and the safety verification of tree fall. It relates to the field of power transmission technology. The calculation method includes: obtaining relevant basic parameters of the current diversion line in the overhead transmission line for calculating the tree felling range; constructing a three-dimensional spatial model of the current diversion line and generating discrete point cloud data of the current diversion line; calculating the spatial coordinates of the treetop at each sampling point; generating square cells centered on each sampling point to be felled and with the sampling interval as the side length; merging adjacent or overlapping cells to form a continuous felling area surface to obtain the current tree felling range of the diversion line.
Owner:四川电力设计咨询有限责任公司

Tree toppling auxiliary tool for green cutting operation

The utility model relates to the technical field of green cutting auxiliary tools, in particular to a green cutting operation tree toppling auxiliary tool which comprises a support and a locking assembly installed at the top end of the support. A tree pulling hook and a rope threading hook; connecting seats are formed at the tail ends of the tree pulling hook and the rope threading hook; the connecting seats are connected and locked with the locking assembly; wherein the bottom end of the rope threading hook is connected with a bending rod, the falling direction of the tree is controlled by adopting three methods, firstly, the tree pulling hook can be utilized to pull the cut tree to the reverse direction of an electric power overhead line; secondly, the trees can be pushed to the direction away from the line through the tree pushing opening; when a large tree with the diameter larger than 20 mm is tied with a rope at a high position through the rope penetrating hook, the falling direction of the tree is controlled through traction of a follow-up rope, and therefore in the felling process, multifunctional control over the falling direction of a tree supporting rod can be achieved, and operation safety is guaranteed.
Owner:HAINAN RAILWAY CO LTD HAIKOU COMPREHENSIVE MAINTENANCE SECTION +2

Logging machine (tracked, medium size)

1. Name of the product in this design: Logging Machine (Crawler Type, Medium Size). 2. Purpose of this design: Equipment for felling and cutting down trees in forestry operations. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. Other situations requiring explanation: The enlarged view of part A is an enlarged view of part A in the rear view; the enlarged view of part B is an enlarged view of part B in the rear view; the enlarged view of part C is an enlarged view of part C in the top view; the enlarged view of part D is an enlarged view of part D in the top view; the enlarged view of part E is an enlarged view of part E in the perspective view; the enlarged view of part F is an enlarged view of part F in the perspective view.
Owner:SHANGHAI SANY HEAVY IND

A tree directional felling device

The present application relates to tree felling technology field, disclose a kind of tree directional felling device, including tree climber, further including oil saw, directional dumping mechanism and seat installed on tree climber;Directional dumping mechanism includes the turnover plate connected on upper support, two arc-shaped plates rotationally connected on the both sides of turnover plate and the locking member for fixing two arc-shaped plates;The side wall of two arc-shaped plates is formed with the connecting plate connected with turnover plate, the bottom of turnover plate is formed with the turnover block articulated with upper support, and turnover plate can be reciprocated up and down in vertical direction around upper support;The upper end of the side of two arc-shaped plates away from turnover plate is formed with locking hole, and locking member includes connecting piece and two locking rods located at the bottom of connecting piece, and locking rod can be inserted into locking hole.The purpose is to segmentally sawn from top to bottom, prevent the tree trunk cut down and hit or stuck in other tree trunks around, avoid causing damage to other trees.
Owner:CHONGQING ACADEMY OF FORESTRY SCI

Method and device for detecting fast-growing forest felling taking into account sentinel-1 temporal autocorrelation

The present application aims at the problem that the Sentinel-1 backscattering data is significantly short-term time autocorrelated due to the influence of rainfall, soil moisture and surface water content change, and further leads to the high false alarm rate of traditional difference cumulative sum and deforestation detection method, discloses a kind of fast-growing forest deforestation detection method and device considering Sentinel-1 time correlation, and proposes an improved difference cumulative sum detection method by fusing sliding time window and random block resampling significance test, which calculates local difference cumulative sum curve using sliding time window, and extracts candidate change points based on maximum value;To overcome the statistical test bias caused by time correlation, a random block resampling strategy is innovatively introduced to retain the local dependence structure of time series, and an extreme difference null hypothesis distribution is constructed for significance test.The present application effectively improves the precision and robustness of short-period fast-growing forest deforestation event automatic identification in large-scale, long-time series monitoring scenarios.
Owner:WUHAN UNIV

A harvester head clamp conveyor

The application provides a felling head clamping and conveying device, which comprises a rack, a power assembly, an auxiliary wheel assembly, a clamping assembly and a transmission detection assembly. The rack is V-shaped in structure. The power assembly is embeddedly installed in the rack. The power assembly comprises a protective casing and a driving roller. The auxiliary wheel assembly comprises a connecting plate and an auxiliary roller. The connecting plate is fixedly connected to the rack. The clamping assembly comprises a connecting shaft, a first connecting arm, a second connecting arm and a connecting swing arm. The transmission detection assembly is used for assisting in detecting the displacement of wood during the movement of the wood relative to the device. The felling head clamping and conveying device adopts a support to support various components, and the structure is reliable. The power assembly, the auxiliary wheel assembly and the clamping assembly form a clamping mechanism, which can quickly and stably clamp the wood. Meanwhile, the transmission detection assembly can reliably and real-timely detect and feed back when the clamping position of the moving wood is adjusted. The device can accurately clamp the wood, so that the felling head can be used to efficiently perform felling work.
Owner:GUANGXI MEISIDA HEAVY IND CO LTD

Self-propelled tree sawing robot and method for loading and unloading thereof

The application belongs to the technical field of felling and branch cutting, and particularly relates to a self-propelled tree sawing robot, which comprises a robot body, an electric saw, walking wheels, a support and a hoisting device. The electric saw is arranged on the robot body through a mechanical arm. The walking wheels are electric walking wheels, and are located above high-voltage wires and walk along the high-voltage wires. The support is rotatably arranged on the robot body, and is driven to rotate by a first driving mechanism. The walking wheels are arranged on the support, and the support drives the walking wheels to move close to or away from the high-voltage wires. The hoisting device is detachably arranged on the robot body through a connecting piece, and is located below the walking wheels. The ropes of the hoisting device and the walking wheels are located on both sides of the high-voltage wires, and the rope ends of the ropes are connected to the ropes after winding around the high-voltage wires. The self-propelled tree sawing robot skillfully realizes convenient on-line and off-line of the self-propelled tree sawing robot, and prunes branches along the existing high-voltage wires.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD CHANGZHOU BRANCH +1

Logging truck (forestry)

ActiveCN309621673SForest industrySoil science
1. Name of the designed product: Timber harvester (forestry). 2. Use of the designed product: for felling timber. 3. Design points of the designed product: combination of shape and pattern. 4. Picture or photo best showing the design points: perspective view.
Owner:河北省林业和草原技术推广总站(河北省林业工作站总站)

System for dismantling cylindrical metal towers and wind turbines, by means of felling, via remote control, and dismantling method

The invention relates to a system comprising: - a guide rail (2) arranged around a tower (1) and secured to same with removable means; - cutting means (6) running along the guide rail (2) and comprising means for spraying a fuel mix and a spark igniter (9); - a motor (10) for moving the cutting means along the guide rail (2); - means for the assisted pulling of the column or tower in order to direct the fall; - means for remotely viewing the cutting process; - a remote control centre (23). Owing to the aforementioned features, the associated risks, complexity of permits and work and high costs are all reduced.
Owner:DEMOLICIÓN Y DESCONTAMINACIÓN SL

Fast-growing forest felling detection method and device considering sentinel No.1 time sequence autocorrelation

The invention discloses a fast-growing forest felling detection method and a fast-growing forest felling detection device taking sentinel No.1 time sequence autocorrelation into account, aiming at the problem that the false alarm rate of a traditional difference value accumulation and felling detection method is relatively high due to the fact that sentinel No.1 back scattering data generates obvious short-term time autocorrelation due to the influence of rainfall, soil moisture and surface moisture content change, and discloses the fast-growing forest felling detection method and the fast-growing forest felling detection device taking sentinel No.1 time sequence autocorrelation into account. An improved difference cumulative sum detection method fusing a sliding time window and a random block resampling significance test is provided, the method uses the sliding time window to calculate a local difference cumulative sum curve, and candidate change points are extracted based on a maximum value; in order to overcome statistical test bias errors caused by time sequence self-correlation, a random block resampling strategy retaining a time sequence local dependence structure is innovatively introduced, and range zero hypothesis distribution for significance test is constructed. According to the method, the precision and robustness of automatic identification of short-period fast-growing forest felling events in a large-range and long-time-sequence monitoring scene are effectively improved.
Owner:WUHAN UNIV

Method for planting white truffle in pinus massoniana

The application provides a method for planting white mushroom on Smith pine stumps, and relates to the technical field of artificial planting of white mushroom. The method for planting white mushroom on Smith pine stumps comprises the following steps: sterilizing old stumps / new stumps after felling of Smith pine by using a blowtorch, pouring a water solution of extract of salt water of drunken fish grass, and inoculating liquid spawn of white mushroom after air-drying, wherein the liquid spawn of white mushroom is obtained by using a mixture of almond paste, extract of salt water of drunken fish grass and potato liquid medium as a culture medium. The application overcomes the shortcomings of the prior art, effectively promotes the growth of white mushroom on the stumps by sterilizing the stumps and using the nutrient agent, adjusts the culture medium components of the white mushroom, increases the yield, and improves the economic benefits.
Owner:YUNNAN ACAD OF FORESTRY

A switching mechanism for switching a chain saw cutting mode

The utility model discloses a kind of switching mechanism for switching chain saw sawing mode, including chain saw main body, operating handle assembly movably installed on chain saw main body, rotating structure and self-locking structure are equipped on the operating handle assembly and chain saw main body, operating handle assembly can be rotated on chain saw main body by rotating structure, self-locking structure can be self-locked fixed to operating handle assembly, so that operating handle assembly is fixed angle of rotation. The utility model is set by operating handle assembly, cooperate with rotating structure, so that rotating handle can be rotated on chain saw main body and fixed in specified position by self-locking structure, so that the relative change of operating handle assembly position of chain saw and chain saw main body occurs, so that the relative position of saw chain in chain saw and operator is changed, so that entire operator can keep same holding posture to complete logging process, reduce the complexity of operator felling, reduce operation difficulty, and improve work efficiency, reduce security risk.
Owner:ZHEJIANG HAIKE POWER CO LTD

Cunninghamia lanceolata forest-oriented periodic tending scheduling method, device and equipment and storage medium

The invention discloses a cedarwood forest-oriented periodic tending scheduling method, device and equipment and a storage medium, and relates to the technical field of intelligent forestry driven by artificial intelligence, and the method comprises the steps: optimizing a preset initial tending period through a tending period adjustment model based on LSTM training, and obtaining a target tending period; when the period is started, collecting multi-mode cedarwood forest data, and preprocessing the multi-mode cedarwood forest data to form target data; inputting the target data into a cunninghamia lanceolata forest growth prediction model constructed by CNN and PointNet, and outputting a breast diameter growth prediction value, a species richness prediction value and a tending standard reaching probability; and an equipment control strategy is generated, and intelligent felling equipment, an automatic replanting device or mechanical brush cutting equipment is scheduled to execute tending operation. According to the method, closed-loop scheduling from period setting, state sensing and intelligent decision making to automatic execution is realized, and periodic intelligent tending scheduling can be realized on the premise of avoiding excessive interference on the Chinese fir forest.
Owner:HUNAN PROSPECTING DESIGNING & RES INST FOR AGRI FORESTRY & IND

Electric chainsaw (1)

ActiveCN309816154SForest harvestingIndustrial engineering
1. The name of the design product: electric chain saw (1). 2. The use of the design product: the design product is used in forest felling, wood processing, construction, outdoor gardening, furniture making and forest fire cleaning, etc. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best shows the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.
Owner:NANTONG HUIQIANG TOOL TECH CO LTD

Device and method for increasing the operational safety of a felling head

The invention relates to a device and a method for harvesting timber using a hydraulically controlled felling head (1) which comprises a gripper and saw unit, wherein the gripper and saw unit has two pivotable gripper arms (4) for harvested material (2) and a cutting element (6) for separating the harvested material (2), wherein the gripper arms (4) can be pivoted into an open state by applying pressure to a first hydraulic line (12a), and the gripper arms (4) can be pivoted into a closed state by applying pressure to a second hydraulic line (12b). According to the invention, the felling head (1) is provided with an opening width sensor (19), and a pressure sensor (15) is arranged in the second hydraulic line (12b), wherein the opening width sensor (19) and the pressure sensor (15) are connected to a controller (13) which is designed to detect a closed state by the pressure (p) measured by the pressure sensor (15) exceeding a predetermined lower limit value (Gp) and to generate a warning signal when a predetermined upper limit value (GW) of the opening width (W) is simultaneously detected in the closed state.
Owner:STEININGER WERNER

Method for collecting snake flies

PCT designated stageWO2026030953A1Animal husbandryNematodeZoology
The present invention belongs to the technical field of insect collection. Disclosed is a method for collecting snake flies. Provided in the present invention is a method for collecting snake flies, comprising the following steps: (1) felling trees infected with pine nematode disease, and segmenting trunks by 1.2-1.5 m; (2) placing the wood segments in an outdoor collection device; and (3) after the eclosion of the snake flies, collecting and feeding same to observe the biological habits thereof. The collection device is of a box body structure consisting of a plurality of separated sub-boxes, each sub-box being provided with a label and air holes on the top surface and provided with a gauze therein. The insect collection method provided by the present invention is easy to popularize, and provides a more reliable and accurate collection means for insect researchers, thereby further playing a positive role in promoting rapid and healthy development of insect collection and research in our country.
Owner:HUANGSHAN UNIV

Forest logging detection methods, devices, electronic equipment and storage media

This application provides a method, apparatus, electronic device, and storage medium for detecting deforestation in forest areas, relating to the field of artificial intelligence technology, to solve the problems of poor real-time performance and high detection costs in forest deforestation detection. The forest deforestation detection method includes: upon detecting the presence of a first feature in a first forest area image, detecting the presence of a second feature in a second forest area image. The first forest area image is acquired by a detection device installed on an outdoor tower. The second forest area image includes all or some features of the first forest area image, and includes the first feature, which is a feature matching the features of deforestation equipment, and the second feature is a feature matching the features of tree felling. If the second forest area image contains the second feature, it is determined that deforestation has occurred in the forest area corresponding to the second forest area image.
Owner:CHINA TOWER CO LTD +1

Sprow harvester for mulberry planting

The utility model discloses a shoot harvester for mulberry planting, which belongs to the technical field of mulberry planting and comprises a driving component, a connecting rod is sleeved at the output end of the driving component, an operating rod is sleeved outside the connecting rod, one side of the connecting rod is fixedly connected with a cutting blade, and the cutting blade is electrically connected with the driving component through a lead. A strap is fixedly connected to the outer portion of the connecting rod, and a shielding device used for blocking cutting chippings is installed at the position, close to the cutting blade, of the connecting rod. According to the mulberry branch cutting device, when a mulberry branch needs to be cut, the mounting plate and the fixing plate are arranged at the proper positions of the connecting rod in a sleeving mode, then the threaded handle is rotated, the threaded handle is clamped in the fixing plate, rotation continues to be conducted, the mounting plate and the fixing plate are fixed outside the connecting rod, and in the cutting process, chippings are thrown to the baffle through rotation of the cutting piece, so that the mulberry branch is cut. And therefore, the blocking of the scraps is realized, and the problem of injury to operators is avoided.
Owner:QUJING HUAJIA ECOLOGICAL SILKWORM BREEDING CO LTD

Moso bamboo branch removing and felling device

The invention provides a moso bamboo branch removing and felling device, and belongs to the technical field of felling. A traditional bamboo felling mode needs felling personnel to swing an axe for many times, a large amount of physical strength is consumed, time is long, long-time operation is not facilitated, and if an electric saw is used for felling, carrying is inconvenient, and the bamboo felling mode is not suitable for forestry researchers to use. The device comprises a handle, a main body, a cutting unit, a fixer, a rotating part and a control unit, the main body wraps the cutting unit, the fixer and the rotating part for fixing and moving the main body, the control unit is located at the lower end of the handle and controls the fixing needle and the blade respectively, and an operator can use the device conveniently. The device is simple in design, reasonable in structure, high in practicability and time-saving and labor-saving, a user opens the fixing device, the bamboo is sleeved with the device, and the bamboo can be cut by operating the control unit; the position of the blade is controlled to adapt to bamboos with different diameters, the fixing needle is made to drill into the bamboos, the device is fixed to the bamboos, and when the device is used, the blade is driven by the control unit to conduct cutting towards the interior of the bamboos, and after cutting is conducted, the blade is controlled to reset, the device is taken down and the position of the blade is adjusted.
Owner:HUZHOU ECOLOGICAL FORESTRY PROTECTION RES CENT

Multifunctional felling saw

1. The name of this design product: Multifunctional felling straight saw. 2. Purpose of this design product: used for cutting objects. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5.Other views have been clearly expressed, and the left and right views are omitted.
Owner:程红旗

Low- speed mobile shredder

The subject of the invention is a low-speed mobile shredder used to shred various types of materials, such as municipal and construction waste, pallets, rubble, tree felling remains, roots, extra-large materials, etc. The low-speed mobile shredder with a frame set on a base with a crawler drive system, with a belt conveyor (10), containing a service chamber (1) with a chute (12), at least one shaft (2) with embedded blades (3), and a chute duct (9) between a wall (5) of the service chamber (1) and a drive gear (8) mounted on connecting plates (11), is characterised in that the waste scraper (7), which is located upstream of the coupling (4), is embedded using a shaped connection on the shaft (2) of every drive gear (8), connected to the coupling (4) located in an opening (6) of the wall (5) of the service chamber (1). The waste scraper (7) has the form of a thin-wall element with centrally a positioned mounting hole (7B) and several scraper arms (7A) arranged in a concentric manner, which are bent at an angle a of 90° to 180°. The scraper arms (7A) of the waste scraper (7) are directed at the side wall (5) of the service chamber (1).
Owner:PRONAR SP ZO O

A poplar plantation structure optimization and sustainable management method and system thereof

ActiveCN121724464BHigh precisionImprove reliabilityForecastingSustainable managementEngineering
The present application belongs to the poplar plantation technical field, and particularly relates to a poplar plantation structure optimization and sustainable management method and system. The method comprises the following steps: S1, constructing a growth model of poplar, and dividing the poplar into three stages of a juvenile stage, a middle-aged stage and a near-mature stage according to the growth model; S2, collecting site factor data; S3, dividing the research area into multiple site grade areas, and configuring differentiated growth parameters, rotation periods and felling intensities for the site grade areas; S4, building a multi-objective linear programming model, and the objective function covers maximization of total wood yield, minimization of management cost and maximization of ecological benefit; S5, linearly fitting the juvenile stage, the middle-aged stage and the near-mature stage to obtain the corresponding linear equations of the stages, embedding the linear equations of S2 into the multi-objective linear programming model as constraint conditions, and clearly defining the forest age range of each stage; and S6, solving the multi-objective linear programming model to obtain optimal felling area, rotation period and felling intensity parameters.
Owner:SHANXI ACAD OF FORESTRY & GRASSLAND SCI +1

Logging equipment

This application discloses a logging device, which includes a frame, a clamping mechanism, and a felling mechanism. The clamping mechanism is connected to the frame and includes an airbag and pneumatic components. The pneumatic components are used to supply or deflate the airbag, which is used to clamp the target to be felled when inflated. The felling mechanism is connected to the frame and is used to fell the target. This application uses an airbag to clamp the target when inflated, improving the stability of the target during the felling process and reducing the risk of unstable felling position due to failure to hold the target firmly.
Owner:BEIJING A&E TECH

Method for transforming and felling low-efficiency forest

The invention discloses a method for transforming and felling a low-efficiency forest, which relates to the field of forest cultivation and comprises the following steps of felling operation, stump treatment, fallen wood treatment and tending management. The felling operation is carried out innovatively by adopting at least one combination mode of a global felling method, a canopy felling method, a lower felling method, a crown diameter felling method and a target diameter-at-breast-height felling method according to forest stand characteristics and operation targets. The cutting strength adopts diameter at breast height; the cutting cycle is set according to the tree age, the wind damage risk, the tree growth height and the forest stand canopy density difference and is carried out in the tree dormancy period. According to the low-efficiency forest transformation felling method, through combined application of multiple targeted felling modes, accurate regulation and control of a forest stand structure are achieved; by adopting the diameter at breast height cutting strength index, the operation design process is simplified, and the operability is improved; measures such as pile cutting treatment and fallen timber on-site scientific stacking are combined, and multiple targets of water and soil conservation, soil fertility maintenance and ecological restoration are effectively considered.
Owner:JIANGSU ACAD OF FORESTRY

Sawing operation control system of feller and feller

The invention discloses a feller sawing operation control system and a feller. The system comprises a controller, a saw motor, a saw plate oil cylinder, a saw plate and chain saw assembly, a first pressure sensor for detecting the loop pressure of the saw plate oil cylinder and a second pressure sensor for detecting the loop load pressure of the saw motor. The controller stores pressure standard values of saw cutting start, saw cutting completion and saw plate return completion; the controller is configured as follows: when saw cutting is started, the saw motor is controlled to rotate at a standard speed, and the saw plate and the chain saw assembly move towards the tree; when the detection value of the second pressure sensor exceeds the pressure standard value at the beginning of saw cutting, the saw motor is switched to rotate at a high speed; when the detection value of the second pressure sensor is reduced to the standard value of the sawing completion pressure, the saw motor is controlled to stop, and the saw plate and the chain saw assembly are reset; and when the detection value of the first pressure sensor is equal to the pressure standard value for completing returning of the saw plate, the saw plate oil cylinder is controlled to stop. The saw motor and the saw plate oil cylinder can be controlled to work, and judgment of a machine hand is replaced.
Owner:XCMG EXCAVATOR MACHINERY CO LTD