CN111504217B - Tree radial growth deformation measurement and real-time monitoring device and working method thereof - Google Patents
Tree radial growth deformation measurement and real-time monitoring device and working method thereof Download PDFInfo
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- CN111504217B CN111504217B CN202010349501.6A CN202010349501A CN111504217B CN 111504217 B CN111504217 B CN 111504217B CN 202010349501 A CN202010349501 A CN 202010349501A CN 111504217 B CN111504217 B CN 111504217B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0035—Measuring of dimensions of trees
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Abstract
The invention provides a tree radial growth deformation measurement and real-time monitoring device and a working method thereof, wherein the tree radial growth deformation measurement and real-time monitoring device comprises two arc-shaped clamps, an elastic buckling component and a real-time monitoring device, wherein one ends of the two arc-shaped clamps are mutually hinged; the working method comprises the following steps: fixing a tree radial growth deformation measuring and real-time monitoring device at the position of 1.3 m breast height of a tree to be detected; secondly, the central measuring sheet of the real-time monitoring device is stretched along the radial direction, so that the central wavelength of the fiber bragg grating sensor on the surface of the measuring sheet is shifted; step three, the fiber bragg grating sensor sends the data monitored in real time in the step two to a fiber bragg grating regulator; and step four, the fiber bragg grating regulator transmits the deformation data acquired by the connected fiber bragg grating sensor to the computer. The beneficial effects of the invention are as follows: the system can monitor the growth of trees in real time and analyze data, and has the advantages of low cost, universality, good portability and simple operability.
Description
Technical Field
The invention relates to the technical field of morphological structure sensing and active monitoring of FBG sensors, in particular to a tree radial growth deformation measuring and real-time monitoring device and a working method thereof.
Background
As a main body of a land ecosystem, real-time monitoring of tree growth data has important significance for ecological development and maintenance of forestry in China, wherein deformation measurement of radial growth of trees is an important index for monitoring the growth process of trees. Most of the traditional tree measuring devices adopt manual measurement and recording, and the measurement result is recorded in a computer. This kind of investigation mode is relatively laggard, and it needs to consume a large amount of manpowers to carry out once measurement, and work efficiency is not high, can't carry out real-time supervision to trees, also can cause the loss to trees in the measurement process simultaneously. For example, patent nos.: 201821307326.9, the name is: a special chi is measured to special trees of forestry to and patent number: 201820224349.7, the name is: a multifunctional tree measuring scale focuses on single precision measurement of the diameter of a tree, but cannot monitor and acquire tree growth data in real time, and meanwhile lacks of subsequent analysis and processing of the measured data.
With the continuous development of computer technology and technology level, the application of electronic technology to tree measurement is paid more and more attention. For example, the patent numbers are: 2013106826379, the name is: the tree measurement system publishes that the unmanned aerial vehicle moves and measures the diameter of the tree, and the patent number is: 2008100562592, the name is: a tree measuring and reconstructing method based on single three-dimensional laser scanning is provided, and the measuring means has high precision and data analysis capability, but the cost is high, and the method is not popular.
How to solve the above technical problems is the subject of the present invention.
Disclosure of Invention
The invention aims to: the device for measuring the radial growth deformation of the tree and monitoring the radial growth deformation of the tree in real time and the working method thereof are provided for solving a series of problems that the existing tree measuring device cannot monitor and analyze data in real time, has higher accuracy, is higher in cost, complex in operation, cannot be popularized and the like.
The invention is realized by the following measures: a tree radial growth deformation measurement and real-time monitoring device comprises two arc-shaped clamps, an elastic buckling assembly and a real-time monitoring device, wherein one ends of the two arc-shaped clamps are hinged with each other;
the other end of each of the two arc-shaped clamps is provided with a connecting end, and the elastic buckling assembly and the real-time monitoring device are arranged on the connecting ends respectively.
As a further optimization scheme of the tree radial growth deformation measurement and real-time monitoring device provided by the invention, the elastic buckling assembly comprises two radial adjusting rods of which two ends are in threaded connection with threaded holes in the connecting ends of the two arc-shaped clamps, a radial tension spring is connected between the two radial adjusting rods between the two connecting ends of the two arc-shaped clamps, and adjusting nuts respectively arranged on threaded sections at two ends of the radial adjusting rods.
The real-time monitoring device comprises two connecting rods arranged on two connecting ends of two arc-shaped clamps, regulators respectively arranged on the two connecting rods, hinged parts respectively positioned on the two connecting rods on the inner sides of the two connecting ends, a measuring sheet fixed between the two hinged parts and a fiber grating sensor fixed on the measuring sheet, wherein the output end of the fiber grating sensor is connected with the input end of a fiber grating regulator, and the output end of the fiber grating sensor is connected with the control end of a computer.
In order to better achieve the above object, the present invention further provides a working method of the device for measuring the radial growth deformation of the tree and monitoring the deformation of the tree in real time, which comprises the following steps:
fixing a tree radial growth deformation measuring and real-time monitoring device at the position of 1.3 m breast height of a tree to be detected;
step two, generating a growing force in the diameter direction of the tree in the growing process, so that the central measuring sheet of the real-time monitoring device is stretched along the radial direction to cause the central wavelength of the fiber grating sensor on the surface of the measuring sheet to shift, wherein the calculation formula is as follows: delta lambdaB＝λB(1-Pe) Δ ε, where λBIs the initial center wavelength of the fiber grating, and Δ λ is the wavelength offset value, PeIs the effective elasto-optical coefficient;
step three, the fiber bragg grating sensor sends the data monitored in real time in the step two to a fiber bragg grating regulator;
and step four, the fiber grating regulator transmits the deformation data collected by the connected fiber grating sensor to a computer to obtain real-time data.
In actual use, the invention comprises the following steps: the tree radial growth deformation measurement and real-time monitoring device is characterized in that an elastic buckling assembly is utilized to fix two arc-shaped clamps around a hinge part between the clamps to the height of a tree to be monitored, a certain distance exists between a radial tension spring and the tree to be monitored, the hinge part and the radial tension spring of the real-time monitoring device part enable a measuring sheet in the middle of monitoring to be only subjected to radial growth force, an optical fiber grating sensor is used for monitoring a middle measuring sheet, the obtained wavelength change is demodulated by a demodulator and then displayed on a computer screen, and therefore tree growth data are obtained.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can carry out real-time monitoring and data analysis on the growth of trees, and has the advantages of low cost, universality, good portability and simple operability.
2. The tree radial growth deformation measuring and real-time monitoring device consists of a fiber grating sensor, a tree radial growth deformation measuring and real-time monitoring device, a fiber grating demodulator and a computer; the real-time monitoring device acquires tree growth data by monitoring a central wavelength deviation value of the fiber grating sensor, and when the tree grows to cause radial deformation of the measuring sheet, the fiber grating demodulator transmits the data acquired by the fiber grating sensor on the surface of the measuring sheet to a computer so as to acquire real-time data.
3. The device comprises a regulator, an adjusting nut, two arc-shaped clamps, a hinging part and radial tension springs, wherein the two arc-shaped clamps are fixed at the position of a tree with the height of 1.3 m at the breast height around the hinging part by the hinging part and are fixed at the position of the tree with the height of 1.3 m by the hinging part, the arc-shaped clamps with different specifications are reserved aiming at the trees with different ages, a certain distance exists between the radial tension springs and the tree to be measured, the phenomenon that the trees are scratched by the stretching of the radial tension springs when the trees grow is avoided, meanwhile, the error of monitoring caused by the vertical growth of the trees is avoided, the radial tension springs can be stretched when the trees grow, the real-time monitoring device can receive the tension force in the growth direction of the tree diameter as well, the hinging part of the real-time monitoring device enables the measuring piece between the two arc-shaped clamps to be only subjected to the tension in the radial direction, and the deflection influence of the stretching of two sides on the central measuring piece is eliminated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a first schematic structural diagram according to an embodiment of the present invention.
Fig. 2 is a second structural diagram according to an embodiment of the present invention.
Fig. 3 is a third schematic structural diagram according to an embodiment of the present invention.
Fig. 4 is a fourth schematic structural diagram according to the embodiment of the present invention.
Fig. 5 is a schematic diagram of data acquisition electronic control of a real-time monitoring device according to an embodiment of the present invention.
Wherein the reference numerals are: 1. an arc-shaped clamp; 2. an elastic buckling component; 20. a radial adjusting rod; 21. a radial tension spring; 22. adjusting the nut; 3. a real-time monitoring device; 30. a connecting rod; 31. a regulator; 32. a hinge member; 33. measuring a sheet; 34. a fiber grating sensor; 4. and a connecting end.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting.
Example 1
Referring to fig. 1 to 5, the present invention provides a technical solution that is realized by the following measures: a tree radial growth deformation measurement and real-time monitoring device comprises two arc-shaped clamps 1, an elastic buckling component 2 and a real-time monitoring device 3, wherein one ends of the two arc-shaped clamps 1 are hinged with each other;
and the other end of each arc-shaped clamp 1 is provided with a connecting end 4, and the elastic buckling component 2 and the real-time monitoring device 3 are arranged on the connecting ends 4 respectively.
Specifically, elasticity lock subassembly 2 includes that both ends threaded connection is two radial adjustment pole 20 in the screwed hole on the link 4 of arc anchor clamps 1 are two between the link 4 be connected with radial extension spring 21 between the radial adjustment pole 20 to and set up respectively radial adjustment pole 20 both ends threaded section on adjusting nut 22.
Specifically, the real-time monitoring device 3 includes two connecting rods 30 disposed on two connecting ends 4 of the arc-shaped clamp 1, two regulators 31 disposed on the two connecting rods 30, two hinged components 32 disposed on two inner sides of the connecting ends 4 on the connecting rods 30, a measuring sheet 33 fixed between the two hinged components 32, and a fiber grating sensor 34 fixed on the measuring sheet 33, wherein an output end of the fiber grating sensor 34 is connected to an input end of the fiber grating regulator, and an output end of the fiber grating sensor is connected to a control end of the computer.
In order to better achieve the above object, the present invention further provides a working method of the device for measuring the radial growth deformation of the tree and monitoring the deformation of the tree in real time, which comprises the following steps:
fixing a tree radial growth deformation measuring and real-time monitoring device at the position of 1.3 m breast height of a tree to be detected;
step two, the tree generates a growing force in the diameter direction in the growing process, so that the central measuring sheet 33 of the real-time monitoring device 3 is stretched along the radial direction to cause the central wavelength of the fiber grating sensor 34 on the surface of the measuring sheet 33 to shift, and the calculation formula is as follows: delta lambdaB＝λB(1-Pe) Δ ε, where λBIs the initial center wavelength of the fiber grating, and Δ λ is the wavelength offset value, PeIs the effective elasto-optic coefficient;
step three, the fiber grating sensor 34 sends the data monitored in real time in the step two to a fiber grating regulator;
and step four, the fiber grating regulator transmits the deformation data collected by the connected fiber grating sensor 34 to the computer.
The specific working process of the invention is as follows: the tree radial growth deformation measurement and real-time monitoring device is characterized in that two arc-shaped clamps 1 are fixed at the positions, 1.3 m in height and diameter at breast height, of a tree to be monitored by means of the elastic buckling assemblies 2 around the hinged parts between the clamps, a certain distance exists between the radial tension springs 21 and the tree to be monitored, the hinged parts 32 and the radial tension springs 21 of the real-time monitoring device 3 enable the measuring sheets 33 in the middle of monitoring to be only subjected to radial growth force, the middle measuring sheets 33 are monitored by the fiber grating sensors 34, the obtained wavelength changes are demodulated by the demodulator and then displayed on a computer screen, and therefore tree growth data are obtained.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (1)
1. A tree radial growth deformation measurement and real-time monitoring device is characterized by comprising two arc-shaped clamps (1) with one ends hinged with each other, an elastic buckling component (2) arranged at the other ends of the two arc-shaped clamps (1) and a real-time monitoring device (3);
the other ends of the two arc-shaped clamps (1) are respectively provided with a connecting end (4), and the elastic buckling component (2) and the real-time monitoring device (3) are respectively arranged on the connecting ends (4);
the elastic buckling assembly (2) comprises two radial adjusting rods (20) with two ends in threaded connection with threaded holes in the connecting ends (4) of the two arc-shaped clamps (1), a radial tension spring (21) is connected between the two radial adjusting rods (20) between the two connecting ends (4) of the two arc-shaped clamps (1), and adjusting nuts (22) respectively arranged on threaded sections at two ends of the radial adjusting rods (20);
the real-time monitoring device (3) comprises two connecting rods (30) arranged on two connecting ends (4) of the two arc-shaped clamps (1), regulators (31) respectively arranged on the two connecting rods (30), hinged parts (32) respectively positioned on the two connecting rods (30) on the inner sides of the two connecting ends (4), a measuring sheet (33) fixed between the two hinged parts (32) and a fiber grating sensor (34) fixed on the measuring sheet (33), wherein the output end of the fiber grating sensor (34) is connected with the input end of a fiber grating regulator, and the output end of the fiber grating sensor is connected with the control end of a computer;
the working method of the tree radial growth deformation measuring and real-time monitoring device comprises the following steps:
fixing a tree radial growth deformation measuring and real-time monitoring device at the position of 1.3 m breast height of a tree to be detected;
secondly, generating a growing force in the diameter direction of the tree in the growing process, so that the central measuring sheet (33) of the real-time monitoring device (3) is stretched along the radial direction to cause the central wavelength deviation of the fiber grating sensor (34) on the surface of the measuring sheet (33), wherein the calculation formula is as follows:
wherein
Is the initial center wavelength of the fiber grating,
as a value for the offset of the wavelength,
is the effective elasto-optic coefficient; Δ ε is the radial strain variation value;
step three, the fiber grating sensor (34) sends the data monitored in real time in the step two to a fiber grating regulator;
and fourthly, the fiber grating regulator transmits the deformation data collected by the connected fiber grating sensor (34) to a computer to obtain real-time data.
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| CN112158253B (en) * | 2020-08-27 | 2022-02-01 | 东风汽车集团有限公司 | Adjustable steering wheel mechanism and automobile |
| CN113959479B (en) * | 2021-10-20 | 2024-04-26 | 中国科学院地理科学与资源研究所 | Living tree climate monitoring device and method based on trunk swing acceleration |
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