CN118031847A - Periodic tree growth diameter monitoring method and system - Google Patents
Periodic tree growth diameter monitoring method and system Download PDFInfo
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Abstract
The invention provides a method and a system for monitoring the growth diameter of a periodic tree, and relates to the technical field of measurement. The method comprises the following steps: at the end time of the current monitoring period, setting a circular ring type measuring instrument at the preset height of the tree, and measuring first distance data; placing the measuring instrument in a preset plane coordinate system after dismantling the measuring instrument, and determining a first position coordinate; determining diameter data of the tree at the preset height at the end time of the current monitoring period; determining the malformation score of the trunk section, determining the growth malformation trend discrimination score according to the malformation score and the diameter data of the historical monitoring period, and further generating prompt information. According to the method and the device, the diameter data can be determined based on the distance data of the plurality of points, so that the diameter data can be accurately determined when the tree grows to be abnormal, and the accuracy of the diameter data is improved. And can confirm the trunk cross-section whether to malform based on the first position coordinate, and grow the trend of malform, provide accurate data basis for confirming the growth condition of trees.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a method and a system for monitoring the growth diameter of a periodic tree.
Background
CN111692948a discloses a tree diameter monitoring device, which comprises a shell, wherein a rotating gear is arranged in the shell, lever shifting sheets are arranged in a meshed manner by the rotating gear, and a reverse rotation counting switch and a forward rotation counting switch are arranged on two sides of each lever shifting sheet; the fiber tape is wound on the rotating gear, a tape outlet is formed in one side of the shell, and the fiber tape passes through the tape outlet and is fixed on the other side of the shell to form a closed loop; the forward rotation counting switch and the reverse rotation counting switch are electrically connected with a control electric plate. The fiber tape of this scheme is binded on trees, and after the trees diameter increased, the fiber tape drives and rotates gear rotation for forward counter switch forward count, by control electroplax with the count information transfer server end, alright dynamic monitoring trees's growth condition has saved manual measurement's loaded down with trivial details.
CN102589504a discloses an online diameter measuring device for growing trees, wherein a control transmission module is respectively connected with a display module and a power module, and the display module is connected with the power module; in the measuring module, a first frame and a second frame of an external frame are opposite and parallel, a third frame and a fourth frame of the external frame are opposite and parallel, a first baffle plate and a second baffle plate are parallel, the first baffle plate and the second baffle plate are respectively installed with the third frame and the fourth frame, and the first baffle plate and the second baffle plate can slide back and forth along the third frame and the fourth frame; the first distance measuring sensor is fixedly arranged on the first frame, the second distance measuring sensor is fixedly arranged on the second frame, and the first distance measuring sensor and the second distance measuring sensor are respectively connected with the control transmission module. The scheme can not only realize accurate measurement of the diameter of the tree in the current period, but also automatically track and measure the diameter measuring device of the tree in different periods in the growth process.
In order to ensure proper growth of the tree, accurate monitoring of the growth of the tree is required, including monitoring of the growth rate of the tree diameter, and monitoring of whether malformation of the tree occurs. However, according to the related art, only the diameter of the tree can be measured, the growth conditions of different growth processes of the tree are compared, and the method for detecting the abnormal trend of the tree in the future lacks effective monitoring means, so that the tree cannot be detected in time when the abnormal trend of the tree is grown, and on the other hand, if the abnormal condition of the tree is generated, that is, the cross section of the trunk has a larger phase difference with the circle, the diameter measurement position is difficult to accurately determine based on the related art, and the diameter of the tree is difficult to accurately measure.
The information disclosed in the background section of the application is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a periodic tree growth diameter monitoring method, which can solve the technical problems that the trend of tree growth deformity is difficult to detect and the diameter of the tree is difficult to accurately measure.
According to a first aspect of an embodiment of the present invention, there is provided a method for monitoring a growth diameter of a periodic tree, including: at the end time of the current monitoring period, setting a ring-shaped measuring instrument at the preset height of the tree, wherein the ring-shaped measuring instrument is arranged around the trunk of the tree and comprises a ring bracket, a plurality of laser range finders are uniformly arranged on the ring bracket, laser emitted by each laser range finders points to the circle center of the ring bracket, the diameter of the ring bracket is larger than that of the tree, and each laser range finders has a serial number; measuring first distance data between the laser rangefinder and the tree surface by each laser rangefinder; removing the circular ring type measuring instrument, and placing the circular ring type measuring instrument in a preset plane coordinate system, wherein the circle center of the circular ring bracket coincides with the origin of the preset plane coordinate system; determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the first distance data and the serial number of each laser range finder; determining diameter data of the tree at the preset height at the end time of the current monitoring period according to the first position coordinates; determining the deformity score of the trunk section at the end time of the current monitoring period according to the first position coordinates and the diameter data; determining a growth deformity trend discrimination score of the tree according to the deformity score and the diameter data at the end time of the current monitoring period and the deformity score and the diameter data of the historical monitoring period; and generating prompt information under the condition that the growth deformity trend discrimination score of the tree is higher than a preset score threshold value.
According to a second aspect of the present invention, there is provided a periodic tree growth diameter monitoring system comprising: the measuring instrument setting module is used for setting a ring-shaped measuring instrument at the preset height of the tree at the end time of the current monitoring period, wherein the ring-shaped measuring instrument is arranged around the trunk of the tree and comprises a ring bracket, a plurality of laser range finders are uniformly arranged on the ring bracket, laser emitted by each laser range finders points to the circle center of the ring bracket, the diameter of the ring bracket is larger than that of the tree, and each laser range finders has a serial number; the first distance data determining module is used for measuring first distance data between the laser range finders and the tree surface through each laser range finders; the measuring instrument dismantling and placing module is used for dismantling the circular ring type measuring instrument and placing the circular ring type measuring instrument in a preset plane coordinate system, wherein the circle center of the circular ring bracket coincides with the origin of the preset plane coordinate system; the first position coordinate determining module is used for determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the first distance data and the serial number of each laser range finder; the diameter data determining module is used for determining the diameter data of the tree at the preset height at the end time of the current monitoring period according to the first position coordinate; the deformity score determining module is used for determining the deformity score of the trunk section at the end time of the current monitoring period according to the first position coordinates and the diameter data; the growth deformity trend discrimination score determining module is used for determining a growth deformity trend discrimination score of the tree according to the deformity score and the diameter data at the end time of the current monitoring period and the deformity score and the diameter data of the historical monitoring period; and the prompt information generation module is used for generating prompt information under the condition that the growth deformity trend discrimination score of the tree is higher than a preset score threshold value.
The technical effects are as follows: according to the invention, the first distance data can be determined by arranging the annular measuring instrument, and the annular measuring instrument is placed in the preset plane coordinate system, so that the first position coordinates of the tree surface measured by each laser range finder can be determined, the diameter data can be determined according to the first position coordinates, the diameter data can be determined based on the distance data of a plurality of points, the diameter data can be accurately determined when the tree grows to be abnormal, and the accuracy of the diameter data is improved. And can confirm the trunk cross-section and appear deformity and grow the trend of deformity on the basis of the first position coordinate, provide accurate data basis for confirming the growth condition of trees. When the first position coordinates are determined, the first position coordinates of the positions of the tree surfaces measured by the laser distance measuring instrument in a preset plane coordinate system can be obtained through the first distance data and the serial numbers of the laser distance measuring instrument, an accurate data basis is provided for obtaining the contour and diameter data of the trunk cross section, and the diameter of the tree is measured by the method. When the diameter data is determined, the maximum value can be taken as the diameter data in the coordinate distance between the first position coordinates corresponding to the laser range finders at the opposite sides, so that the diameter data of the tree can be accurately measured under the condition that the growth of the tree is abnormal, and the accuracy and objectivity of tree diameter measurement are improved. And providing a data basis for determining the malformation score of the trunk section and the growth malformation trend discrimination score of the tree. When the deformation score is determined, the minimum value and the maximum value of the length of the longest line segment in the outline of the trunk section can be determined, and the deformation score is obtained based on the relative deviation of the maximum value and the minimum value, so that the deformation score can accurately describe the deformation degree of the trunk section, the accuracy and objectivity of the determination of the deformation degree of the trunk section are improved, and basic data are provided for determining the growth deformation trend discrimination score of the tree. When the growth deformity trend discrimination score is determined, the growth deformity trend discrimination score of the tree can be obtained according to the variation rate of the deformity score of the tree relative to the diameter data, and the trend of the growth deformity of the tree can be accurately described. Is helpful for judging the health condition of the tree.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed. Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other embodiments may be obtained according to these drawings without inventive effort to a person skilled in the art;
fig. 1 exemplarily shows a flowchart of a periodic tree growth diameter monitoring method according to an embodiment of the present invention:
FIG. 2 schematically illustrates a circular gauge according to an embodiment of the invention;
Fig. 3 schematically illustrates a periodic tree growth diameter monitoring system in accordance with an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 1 exemplarily shows a flowchart of a periodic tree growth diameter monitoring method according to an embodiment of the present invention, the method including: step S101, at the end time of the current monitoring period, setting a ring-shaped measuring instrument at the preset height of the tree, wherein the ring-shaped measuring instrument is arranged around the trunk of the tree and comprises a ring bracket, a plurality of laser range finders are uniformly arranged on the ring bracket, laser emitted by each laser range finders points to the circle center of the ring bracket, the diameter of the ring bracket is larger than that of the tree, and each laser range finders has a serial number; step S102, measuring first distance data between the laser range finders and the tree surface through each laser range finders; step S103, removing the circular measuring instrument, and placing the circular measuring instrument in a preset plane coordinate system, wherein the circle center of the circular support coincides with the origin of the preset plane coordinate system; step S104, determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the first distance data and the serial number of each laser range finder; step S105, determining diameter data of the tree at the preset height at the end time of the current monitoring period according to the first position coordinates; step S106, determining the deformity score of the trunk section at the end time of the current monitoring period according to the first position coordinates and the diameter data; step S107, determining a growth deformity trend discrimination score of the tree according to the deformity score and the diameter data at the end time of the current monitoring period and the deformity score and the diameter data of the historical monitoring period; step S108, generating prompt information under the condition that the growth deformity trend discrimination score of the tree is higher than a preset score threshold.
According to the periodic tree growth diameter monitoring method, the first distance data can be determined by arranging the annular measuring instrument, the annular measuring instrument is placed in the preset plane coordinate system, and the first position coordinates of the tree surface measured by each laser range finder are determined, so that the diameter data can be determined according to the first position coordinates, the diameter data can be determined based on the distance data of a plurality of points, the diameter data can be accurately determined when the tree grows to be abnormal, and the accuracy of the diameter data is improved. And can confirm the trunk cross-section and appear deformity and grow the trend of deformity on the basis of the first position coordinate, provide accurate data basis for confirming the growth condition of trees.
According to an embodiment of the present invention, in step S101, at the end of the current monitoring period, at a preset height of the tree, a circular gauge is set.
Fig. 2 shows a schematic diagram of an annular measuring device according to an embodiment of the invention. In fig. 2, the broken line represents the outline of the trunk cross section, the circular solid line represents the circular ring support, and a plurality of laser rangefinders are uniformly arranged on the circular ring support.
According to the embodiment of the invention, the ring-shaped measuring instrument is arranged around the trunk of the tree, the ring-shaped measuring instrument comprises a ring support, a plurality of laser rangefinders are uniformly arranged on the ring support, the laser emitted by each laser rangefinder is directed to the circle center of the ring support, the diameter of the ring support is larger than that of the tree, namely, the ring support is not contacted with the surface of the tree, a certain distance exists between the ring support and the tree, the circle center of the ring support and the centroid of the trunk section can be overlapped or not overlapped, and the ring support can be arranged around the trunk section. In monitoring the change in the growth diameter of the tree, a longer monitoring period can be set because the tree grows slowly. For example, the monitoring period is determined to be 6 months. Because the diameters of different heights of the same tree have larger difference, the circular ring type measuring instrument is arranged at the preset height, for example, the preset height is determined to be 1 meter, and the diameters of the same height can be measured at the end time of each monitoring period, so that the diameter data measured in different monitoring periods are comparable. A plurality of laser range finders are uniformly arranged on the circular ring support, each laser range finders is provided with a serial number, for example, every 15 degrees, 22.5 degrees or 30 degrees of central angle, and one laser range finders is arranged. The ring-shaped range finders are detachable, and the ring brackets larger than the diameter of the tree are arranged at preset heights, so that all the laser range finders are positioned on the plane of the preset heights.
According to an embodiment of the present invention, in step S102, first distance data between the laser rangefinder and the tree surface is measured by the respective laser rangefinder. All the laser rangefinders are started, and first distance data between the laser rangefinders and the tree surface are measured. For example, a circular ring meter has twelve laser rangefinders and twelve sets of first range data may be obtained.
In this way, the first distance data can be periodically measured through the detachable annular measuring instrument, the measuring accuracy of the first distance data is improved, and basic data are provided for determining the diameter data of the tree, the malformation score of the trunk section and the growth malformation trend discrimination score of the tree.
According to an embodiment of the present invention, in step S103, the ring-shaped gauge is removed, and the ring-shaped gauge is placed in a preset plane coordinate system, wherein the center of the circle of the ring support coincides with the origin of the preset plane coordinate system. And the laser range finder with the serial number of 1 can be positioned on the x axis of the plane coordinate system, so that the calculation of the subsequent coordinates is facilitated. Since the first distance data measured by each laser range finder is obtained, the position of the tree surface measured by the laser range finder in the preset plane coordinate system can be determined based on the position of the laser range finder in the preset plane coordinate system, namely, the position is the same as the central angle of the position of the laser range finder in the preset plane coordinate system, the distance between the position and the origin is closer than the distance between the position of the laser range finder in the preset plane coordinate system and the origin, and the difference between the position and the origin is the first distance data. And after the positions of the tree surfaces measured by the laser rangefinders in a preset plane coordinate system are determined, the outline of the trunk section in the preset plane coordinate system can be obtained, and then the tree diameter can be solved based on the outline.
According to an embodiment of the present invention, in step S104, according to the first distance data and the serial number of each laser rangefinder, determining a first position coordinate of the position of the tree surface measured by each laser rangefinder in the preset plane coordinate system includes: acquiring the number of laser range finders and the radius of the circular ring bracket; and determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the number of the laser range finders, the serial numbers of the laser range finders, the radius of the ring support and the first distance data.
According to the embodiment of the invention, the number of the laser range finders and the radius of the circular ring bracket can be obtained. For example, 12 laser rangefinders are provided in a circular meter, and the radius of the circular bracket is 30 cm according to measurement.
According to an embodiment of the present invention, determining a first position coordinate of a position of the tree surface measured by each laser rangefinder in the preset plane coordinate system according to the number of laser rangefinders, the serial numbers of the laser rangefinders, the radius of the ring support and the first distance data includes: determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to formula (1)，/>(1) Wherein R is the radius of the circular ring bracket,/>For the first distance data between the ith measuring laser range finder and the tree surface, n is the number of the laser range finders, i is less than or equal to n, and both i and n are positive integers.
According to an embodiment of the present invention, in the formula (1), the distance from the position of the tree surface measured by the ith laser rangefinder to the center of the circular ring supportTherefore, in the plane coordinate system, the distance between the position of the tree surface measured by the ith laser distance meter and the origin of the coordinate system is also/>. Since n is the number of the laser rangefinders and the laser rangefinder with the serial number of 1 is on the x-axis of the plane coordinate system, the included angle/>, between the ith laser rangefinder and the x-axis of the plane coordinate system can be determinedFor example, the laser rangefinder with the serial number 2 in the ring-shaped measuring instrument provided with 12 laser rangefinders has an angle of 30 ° with the x-axis of the planar coordinate system. Therefore, the position of the tree surface measured by the ith laser rangefinder is/>, on the abscissa in the preset planar coordinate systemSimilarly, the position of the tree surface measured by the ith laser rangefinder is the ordinate in the preset plane coordinate system. And according to the abscissa and the ordinate, obtaining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system.
Through the mode, the first position coordinate of the position of the tree surface measured by the laser range finder in the preset plane coordinate system can be obtained through the first distance data and the serial number of the laser range finder, an accurate data base is provided for obtaining the outline and diameter data of the trunk section, and the tree diameter is measured through the mode.
According to an embodiment of the present invention, in step S105, determining diameter data of the tree at the preset height at the end time of the current monitoring period according to the first position coordinate includes: acquisition sequence number 1 toFirst position coordinates corresponding to the laser range finder and with serial number/>First position coordinates corresponding to n laser rangefinders, wherein n is the number of the laser rangefinders; determining a coordinate distance between a first position coordinate corresponding to the laser range finder with the sequence number j and a first position coordinate corresponding to the laser range finder with the sequence number k, wherein/>，/>And j and k are positive integers; and determining the diameter data of the tree at the preset height at the end time of the current monitoring period according to the coordinate distance.
According to an embodiment of the present invention, the sequence numbers 1 to 1 are determined according to formula (1)First position coordinates corresponding to the laser range finder and with serial number/>And (5) corresponding to the first position coordinates of the laser range finders from n. For example, when the number of the laser rangefinders is 12, the first position coordinates corresponding to the laser rangefinders with the serial numbers of 1 to 6 and the first position coordinates corresponding to the laser rangefinders with the serial numbers of 7 to 12 are respectively determined. And determining the coordinate distance between the first position coordinate corresponding to the laser range finder with the sequence number j and the first position coordinate corresponding to the laser range finder with the sequence number k according to the first position coordinate. Sequence numbers 1 to/>The laser range finder of (2) is positioned on one side of the tree, and the serial number is/>The laser rangefinders from n to n are located on the other side of the tree, so the laser rangefinder with the number j and the laser rangefinder with the number k are respectively located on two sides of the tree, and the diameter of the tree may not be exactly the first position coordinate corresponding to the laser rangefinder with the number j and the number/>, because the tree may grow to be abnormal, i.e. the trunk cross section may not be in a regular shapeThe distance between the first position coordinates corresponding to the laser rangefinder of number j (i.e., the laser rangefinder facing number j), and thus the diameter data may be determined in the following manner.
According to an embodiment of the present invention, determining diameter data of the tree at the preset height at the end time of the current monitoring period according to the coordinate distance includes: determining diameter data of the tree at the preset height at the end time of the current monitoring period according to formula (2)，/>(2) Wherein/>The coordinate distance between the first position coordinate corresponding to the laser range finder with the sequence number j and the first position coordinate corresponding to the laser range finder with the sequence number k.
According to an embodiment of the present invention, in the formula (2), a coordinate distance between a first position coordinate corresponding to the laser rangefinder with the number j and a first position coordinate corresponding to the laser rangefinder with the number kAs described above, the diameter of the tree may not be exactly the first position coordinate corresponding to the laser rangefinder with number j and the number/>, as the tree may be distorted in growthThe distance between the first position coordinates corresponding to the laser rangefinder of the opposite side (i.e., the laser rangefinder facing the number j) may be taken as the diameter data.
In this way, the maximum value can be taken as diameter data in the coordinate distance between the first position coordinates corresponding to the laser range finders at opposite sides, so that the diameter data of the tree can still be accurately measured under the condition that the growth of the tree is abnormal, and the accuracy and objectivity of tree diameter measurement are improved. And providing a data basis for determining the malformation score of the trunk section and the growth malformation trend discrimination score of the tree.
According to an embodiment of the present invention, in step S106, determining a deformity score of the trunk cross section at the end time of the current monitoring period according to the first position coordinates and the diameter data, includes: acquisition sequence number 1 toFirst position coordinates corresponding to the laser range finder and with serial number/>First position coordinates corresponding to n laser rangefinders, wherein n is the number of the laser rangefinders; determining a coordinate distance between a first position coordinate corresponding to the laser range finder with the sequence number j and a first position coordinate corresponding to the laser range finder with the sequence number k, wherein/>，/>And j and k are positive integers; and determining the deformity score of the trunk section at the end time of the current monitoring period according to the diameter data and the coordinate distance.
According to an embodiment of the present invention, in step S106, determining a deformity score of the trunk cross section at the end time of the current monitoring period according to the first position coordinates and the diameter data, includes: acquisition sequence number 1 toFirst position coordinates corresponding to the laser range finder and with serial number/>First position coordinates corresponding to n laser rangefinders, wherein n is the number of the laser rangefinders; determining a coordinate distance between a first position coordinate corresponding to the laser range finder with the sequence number j and a first position coordinate corresponding to the laser range finder with the sequence number k, wherein/>，/>And j and k are positive integers; and determining the deformity score of the trunk section at the end time of the current monitoring period according to the diameter data and the coordinate distance.
According to an embodiment of the present invention, determining a deformity score of a trunk section at an end time of a current monitoring period according to the diameter data and the coordinate distance includes: determining a deformity score for a trunk cross-section at the end of the current monitoring period according to equation (3)，/>(3) Wherein/>Is the coordinate distance between the first position coordinate corresponding to the laser range finder with the serial number j and the first position coordinate corresponding to the laser range finder with the serial number k,Is the diameter data.
According to an embodiment of the present invention, in formula (3), the laser rangefinder with number j measures the maximum value of the distance between the position of the tree surface measured by the laser rangefinder on the opposite side of the tree surface and the position of the tree surface measured by the laser rangefinderThat is, the length of the longest line segment within the outline of the trunk section starting from the position of the tree surface measured by the laser rangefinder with the number j. For example, in a ring-type measuring instrument provided with twelve laser rangefinders, the distance between the position of the tree surface measured by the laser rangefinder with the number 1 and the position of the tree surface measured by the 6 laser rangefinders on the opposite side thereof can be measured, so that the length of the longest line segment within the outline of the trunk section starting from the position of the tree surface measured by the laser rangefinder with the number 1 can be obtained. Similarly, the lengths of the longest line segments within the profile of the trunk cross-section corresponding to the laser rangefinders numbered 1 through 6 may be determined. Minimum value of length of longest line segment within profile of trunk sectionsAnd the maximum value is the diameter data. Therefore, the molecular part of the formula (3) is the deviation between the maximum value and the minimum value, and the ratio of the deviation to the diameter data is the relative deviation between the maximum value and the minimum value, which can be used as a malformation score for describing whether the trunk section is malformed. The lower the deformity score, i.e. the smaller the gap between the maximum and minimum values, the closer the trunk cross-section is to a regular circle, whereas the higher the deformity score, i.e. the larger the gap between the maximum and minimum values, the more irregular the trunk cross-section, possibly occurring deformity during growth.
By the method, the minimum value and the maximum value of the length of the longest line segment in the outline of the trunk section can be determined, and the malformation score is obtained based on the relative deviation of the maximum value and the minimum value, so that the malformation score can accurately describe the malformation degree of the trunk section, the accuracy and objectivity of determining the malformation degree of the trunk section are improved, and basic data are provided for determining the growth malformation trend discrimination score of the tree.
According to an embodiment of the present invention, in step S107, determining a growth deformity trend discrimination score of a tree according to the deformity score and the diameter data at the end time of the current monitoring period and the deformity score and the diameter data of the historical monitoring period, includes: acquiring deformity score and diameter data at the end time of the previous monitoring period and deformity score and diameter data at the end time of the previous two monitoring periods in the historical monitoring period; determining the growth deformity trend discrimination score of the tree according to the deformity score and the diameter data at the ending time of the current monitoring period, the deformity score and the diameter data at the ending time of the previous monitoring period and the deformity score and the diameter data at the ending time of the previous two monitoring periods.
According to the embodiment of the invention, the diameter data and the deformity score obtained in the current monitoring period are compared with the deformity score and the diameter data in the historical monitoring period to judge the trend of tree growth deformity, namely whether the deformity problem is more serious than the historical period. Deformity score and diameter data at the end of the previous monitoring period and deformity score and diameter data at the end of the previous two monitoring periods may be obtained.
According to an embodiment of the present invention, determining a growth deformity trend discrimination score of a tree according to the deformity score and the diameter data at the end time of a current monitoring period, the deformity score and the diameter data at the end time of a previous monitoring period, and the deformity score and the diameter data at the end time of the previous two monitoring periods includes: determining a growth deformity trend discrimination score J of the tree according to a formula (4),(4) Wherein/>Scoring deformity at the end of the current monitoring period,/>Deformity score at the end of the previous monitoring period,/>Scoring deformity at the end of the first two monitoring cycles,/>For diameter data at the end of the current monitoring period,/>For diameter data at the end of the previous monitoring period,/>Diameter data for the end of the first two monitoring cycles.
According to an embodiment of the present invention, in the formula (4), the degree of variation of the deformity score from the end time of the previous cycle to the end time of the current cycle isDegree of change in diameter data/>, from previous cycle end time to current cycle end time. Thus/>The rate of change of the deformity score relative to the diameter data from the end of the previous cycle to the end of the current cycle may be represented. Similarly, the rate of change/>, of the deformity score relative to the diameter data, from the end of the previous two cycles to the end of the previous cycle, can be determined. Thus,/>The comparison of the two change rates can be used as a discrimination score of the growth deformity trend of the tree. If the trend of the tree growth deformity is judged that the rate of change of the deformity score relative to the diameter is increasing, namely, the rate of change of the deformity score relative to the diameter is faster, the severity of the deformity is expected to be more serious in the process of tree growth and diameter increase in the future, otherwise, the rate of change of the deformity score relative to the diameter is slower, and the severity of the deformity is expected to be reduced in the process of tree growth and diameter increase in the future.
According to the embodiment of the present invention, in step S108, in the case that the growth deformity trend discrimination score of the tree is higher than the preset score threshold, a prompt message is generated. For example, the preset scoring threshold may be set to 0, when the growth deformity trend discrimination score of the tree is greater than 0, the tree grows with the growth, the severity of the deformity becomes worse, a prompt message may be generated, the cause of the deformity may be found in time, and corresponding measures may be performed in time, for example, the fertilizer required for tree growth is supplemented, and the pests growing in the tree are removed. Conversely, when the tree has a trend discrimination score of less than or equal to 0, the severity of the deformity is reduced as the tree grows.
By the method, the tree growth deformity trend discrimination score can be obtained according to the change rate of the tree deformity score relative to the diameter data, and the tree growth deformity trend can be accurately described. Is helpful for judging the health condition of the tree.
According to the periodic tree growth diameter monitoring method provided by the embodiment of the invention, the first distance data can be determined by arranging the annular measuring instrument, the annular measuring instrument is placed in the preset plane coordinate system, and the first position coordinates of the tree surface measured by each laser range finder are determined, so that the diameter data can be determined according to the first position coordinates, the diameter data can be determined based on the distance data of a plurality of points, the diameter data can be accurately determined when the tree grows to be abnormal, and the accuracy of the diameter data is improved. And can confirm the trunk cross-section and appear deformity and grow the trend of deformity on the basis of the first position coordinate, provide accurate data basis for confirming the growth condition of trees. When the first position coordinates are determined, the first position coordinates of the positions of the tree surfaces measured by the laser distance measuring instrument in a preset plane coordinate system can be obtained through the first distance data and the serial numbers of the laser distance measuring instrument, an accurate data basis is provided for obtaining the contour and diameter data of the trunk cross section, and the diameter of the tree is measured by the method. When the diameter data is determined, the maximum value can be taken as the diameter data in the coordinate distance between the first position coordinates corresponding to the laser range finders at the opposite sides, so that the diameter data of the tree can be accurately measured under the condition that the growth of the tree is abnormal, and the accuracy and objectivity of tree diameter measurement are improved. And providing a data basis for determining the malformation score of the trunk section and the growth malformation trend discrimination score of the tree. When the deformation score is determined, the minimum value and the maximum value of the length of the longest line segment in the outline of the trunk section can be determined, and the deformation score is obtained based on the relative deviation of the maximum value and the minimum value, so that the deformation score can accurately describe the deformation degree of the trunk section, the accuracy and objectivity of the determination of the deformation degree of the trunk section are improved, and basic data are provided for determining the growth deformation trend discrimination score of the tree. When the growth deformity trend discrimination score is determined, the growth deformity trend discrimination score of the tree can be obtained according to the variation rate of the deformity score of the tree relative to the diameter data, and the trend of the growth deformity of the tree can be accurately described. Is helpful for judging the health condition of the tree.
Fig. 3 schematically illustrates a periodic tree growth diameter monitoring system according to an embodiment of the invention, the system comprising: the measuring instrument setting module is used for setting a ring-shaped measuring instrument at the preset height of the tree at the end time of the current monitoring period, wherein the ring-shaped measuring instrument is arranged around the trunk of the tree and comprises a ring bracket, a plurality of laser range finders are uniformly arranged on the ring bracket, laser emitted by each laser range finders points to the circle center of the ring bracket, the diameter of the ring bracket is larger than that of the tree, and each laser range finders has a serial number; the first distance data determining module is used for measuring first distance data between the laser range finders and the tree surface through each laser range finders; the measuring instrument dismantling and placing module is used for dismantling the circular ring type measuring instrument and placing the circular ring type measuring instrument in a preset plane coordinate system, wherein the circle center of the circular ring bracket coincides with the origin of the preset plane coordinate system; the first position coordinate determining module is used for determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the first distance data and the serial number of each laser range finder; the diameter data determining module is used for determining the diameter data of the tree at the preset height at the end time of the current monitoring period according to the first position coordinate; the deformity score determining module is used for determining the deformity score of the trunk section at the end time of the current monitoring period according to the first position coordinates and the diameter data; the growth deformity trend discrimination score determining module is used for determining a growth deformity trend discrimination score of the tree according to the deformity score and the diameter data at the end time of the current monitoring period and the deformity score and the diameter data of the historical monitoring period; and the prompt information generation module is used for generating prompt information under the condition that the growth deformity trend discrimination score of the tree is higher than a preset score threshold value.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (10)
1. A method for monitoring the growth diameter of a periodic tree, comprising: at the end time of the current monitoring period, setting a ring-shaped measuring instrument at the preset height of the tree, wherein the ring-shaped measuring instrument is arranged around the trunk of the tree, the ring-shaped measuring instrument comprises a ring bracket, a plurality of laser range finders are uniformly arranged on the ring bracket, laser emitted by each laser range finders points to the circle center of the ring bracket, the diameter of the ring bracket is larger than that of the tree, and each laser range finders has a serial number; measuring first distance data between the laser rangefinder and the tree surface by each laser rangefinder; removing the circular ring type measuring instrument, and placing the circular ring type measuring instrument in a preset plane coordinate system, wherein the circle center of the circular ring bracket coincides with the origin of the preset plane coordinate system; determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the first distance data and the serial number of each laser range finder; determining diameter data of the tree at the preset height at the end time of the current monitoring period according to the first position coordinates; determining the deformity score of the trunk section at the end time of the current monitoring period according to the first position coordinates and the diameter data; determining a growth deformity trend discrimination score of the tree according to the deformity score and the diameter data at the end time of the current monitoring period and the deformity score and the diameter data of the historical monitoring period; and generating prompt information under the condition that the growth deformity trend discrimination score of the tree is higher than a preset score threshold value.
2. The method for monitoring the diameter of the tree growth according to claim 1, wherein determining the first position coordinates of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the first distance data and the serial number of each laser range finder comprises: acquiring the number of laser range finders and the radius of the circular ring bracket; and determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the number of the laser range finders, the serial numbers of the laser range finders, the radius of the ring support and the first distance data.
3. The method for monitoring the diameter of the tree growth according to claim 2, wherein determining the first position coordinates of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the number of the laser range finders, the serial numbers of the laser range finders, the radius of the circular ring bracket and the first distance data comprises: according to the formulaDetermining a first position coordinate/>, in the preset plane coordinate system, of the position of the tree surface measured by the ith laser range finderWherein R is the radius of the circular ring bracket,/>For the first distance data between the ith measuring laser range finder and the tree surface, n is the number of the laser range finders, i is less than or equal to n, and both i and n are positive integers.
4. The method for monitoring the diameter of the growth of the tree according to claim 1, wherein determining the diameter data of the tree at the preset height at the end time of the current monitoring period according to the first position coordinates comprises: acquisition sequence number 1 toFirst position coordinates corresponding to the laser range finder and with serial number/>First position coordinates corresponding to n laser rangefinders, wherein n is the number of the laser rangefinders; determining a coordinate distance between a first position coordinate corresponding to the laser range finder with the sequence number j and a first position coordinate corresponding to the laser range finder with the sequence number k, wherein/>，And j and k are positive integers; and determining the diameter data of the tree at the preset height at the end time of the current monitoring period according to the coordinate distance.
5. The method for monitoring the diameter of the growth of the tree according to claim 4, wherein determining the diameter data of the tree at the preset height at the end time of the current monitoring period according to the coordinate distance comprises: according to the formulaDetermining the diameter data/>, at the preset height, of the tree at the end time of the current monitoring periodWherein/>The coordinate distance between the first position coordinate corresponding to the laser range finder with the sequence number j and the first position coordinate corresponding to the laser range finder with the sequence number k.
6. The method of periodic tree growth diameter monitoring according to claim 1, wherein determining a deformity score for a trunk cross section at an end time of a current monitoring period based on the first position coordinates and the diameter data comprises: acquisition sequence number 1 toFirst position coordinates corresponding to the laser range finder and with serial number/>First position coordinates corresponding to n laser rangefinders, wherein n is the number of the laser rangefinders; determining a coordinate distance between a first position coordinate corresponding to the laser range finder with the sequence number j and a first position coordinate corresponding to the laser range finder with the sequence number k, wherein/>，And j and k are positive integers; and determining the deformity score of the trunk section at the end time of the current monitoring period according to the diameter data and the coordinate distance.
7. The method of periodic tree growth diameter monitoring according to claim 6, wherein determining a deformity score for a trunk section at an end time of a current monitoring period based on the diameter data and the coordinate distance comprises: according to the formulaDetermining the deformity score/>, of the trunk cross section at the end of the current monitoring periodWherein/>Coordinate distance between first position coordinate corresponding to laser range finder with serial number j and first position coordinate corresponding to laser range finder with serial number k,/>Is the diameter data.
8. The method of periodic tree growth diameter monitoring according to claim 6, wherein determining a tree growth deformity trend discrimination score based on the deformity score and the diameter data at the end time of the current monitoring period and deformity score and diameter data of the historical monitoring period comprises: acquiring deformity score and diameter data at the end time of the previous monitoring period and deformity score and diameter data at the end time of the previous two monitoring periods in the historical monitoring period; determining the growth deformity trend discrimination score of the tree according to the deformity score and the diameter data at the ending time of the current monitoring period, the deformity score and the diameter data at the ending time of the previous monitoring period and the deformity score and the diameter data at the ending time of the previous two monitoring periods.
9. The method of periodic tree growth diameter monitoring according to claim 8, wherein determining a tree growth deformity trend discrimination score based on the deformity score and the diameter data at the end time of the current monitoring period, deformity score and diameter data at the end time of the previous monitoring period, and deformity score and diameter data at the end time of the previous two monitoring periods, comprises: according to the formulaDetermining a growth deformity trend discrimination score J of a tree, wherein/>Scoring deformity at the end of the current monitoring period,/>Deformity score at the end of the previous monitoring period,/>Scoring deformity at the end of the first two monitoring cycles,/>For diameter data at the end of the current monitoring period,/>For diameter data at the end of the previous monitoring period,/>Diameter data for the end of the first two monitoring cycles.
10. A periodic tree growth diameter monitoring system, comprising: the measuring instrument setting module is used for setting a ring-shaped measuring instrument at the preset height of the tree at the end time of the current monitoring period, wherein the ring-shaped measuring instrument is arranged around the trunk of the tree and comprises a ring bracket, a plurality of laser range finders are uniformly arranged on the ring bracket, laser emitted by each laser range finders points to the circle center of the ring bracket, the diameter of the ring bracket is larger than that of the tree, and each laser range finders has a serial number; the first distance data determining module is used for measuring first distance data between the laser range finders and the tree surface through each laser range finders; the measuring instrument dismantling and placing module is used for dismantling the circular ring type measuring instrument and placing the circular ring type measuring instrument in a preset plane coordinate system, wherein the circle center of the circular ring bracket coincides with the origin of the preset plane coordinate system; the first position coordinate determining module is used for determining a first position coordinate of the position of the tree surface measured by each laser range finder in the preset plane coordinate system according to the first distance data and the serial number of each laser range finder; the diameter data determining module is used for determining the diameter data of the tree at the preset height at the end time of the current monitoring period according to the first position coordinate; the deformity score determining module is used for determining the deformity score of the trunk section at the end time of the current monitoring period according to the first position coordinates and the diameter data; the growth deformity trend discrimination score determining module is used for determining a growth deformity trend discrimination score of the tree according to the deformity score and the diameter data at the end time of the current monitoring period and the deformity score and the diameter data of the historical monitoring period; and the prompt information generation module is used for generating prompt information under the condition that the growth deformity trend discrimination score of the tree is higher than a preset score threshold value.
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