Device and method for calculating the lateral shade ratio of a tree trunk under a forest canopy

Abstract

The present application relates to the technical field of measurement method, in particular to a device for calculating the lateral shade rate of tree trunks under forest, comprising a main base rope, a flexible circuit board arranged on the surface of the main base rope, a plurality of groups of LED lamp beads arranged on the surface of the flexible circuit board, and a light source for irradiating tree trunks to form tree trunk shadows, which is formed by the cooperation of the main base rope, the flexible circuit board, a circuit board power supply connector, the LED lamp beads and an auxiliary tether m The lateral shade rate of tree trunks is calculated for each single measurement m； After n measurements, the average of the lateral shade rates of tree trunks after n measurements is measured as SSR.

Description

Technical Field

[0001] This invention relates to the field of measurement methods, specifically to a device and measurement method for calculating the lateral shading rate of tree trunks under forest canopy. Background Technology

[0002] Lateral shading rate refers to the degree of shading of sunlight by understory trees within a forest. It is one of the important indicators reflecting the light loss after light enters the forest from the canopy. Differences in understory light environment have a significant impact on the growth of understory plants, seed germination of canopy trees, and seedling growth. Sufficient light can promote the growth of seedling roots, resulting in a larger root-to-stem ratio, and is also conducive to nutrient accumulation, promoting flowering and fruiting. Leaves are the organs of trees that directly receive sunlight and are most affected by light in terms of morphology, structure, and physiological characteristics. They are adaptable to light. Due to differences in the light intensity of the habitat where leaves are located, their morphology, structure, and physiological characteristics often exhibit variations in adaptation to light. Therefore, a quantitative method for expressing the understory light environment by calculating shading rate is of great significance for forest management measures such as understory seed germination and seedling growth, as well as for sustainable forest development.

[0003] Traditional methods for measuring the lateral shading of tree trunks in forests mainly rely on manual measurement and observation of the natural environment. This method suffers from problems such as low efficiency, poor stability, large measurement errors, and inability to express quantitatively. Especially in the case of frequent rainy weather in the south, it is difficult to achieve real-time measurement. Therefore, we propose a device and measurement method for calculating the lateral shading rate of tree trunks in forests. Summary of the Invention

[0004] To address the technical problems existing in the prior art, the present invention provides a device and measurement method for calculating the lateral shading rate of tree trunks under forest cover.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for calculating the lateral shading rate of tree trunks under forest cover, comprising a main base rope, a flexible circuit board disposed on the surface of the main base rope, and a plurality of LED beads arranged on the surface of the flexible circuit board.

[0006] Preferably, the light emitted by the LED beads is emitted horizontally in the direction in which the LED beads are oriented.

[0007] Preferably, the flexible circuit board has a circuit board power supply connector at its end.

[0008] Preferably, the back of the main base rope is provided with an auxiliary tie rope, and both ends of the main base rope are provided with through holes.

[0009] Measurement method for a device to calculate the lateral shading rate of tree trunks in forest understory.

[0010] S1. The main base rope is suspended on any pole in a parallel manner. The main base rope is completely attached to the pole. The LED beads on the main base rope maintain the same orientation under the support of the pole.

[0011] S2. Power is supplied to the flexible circuit board through the power supply connector of the circuit board using an external power supply. After being powered on, the LED beads on the flexible circuit board emit nearly parallel light. Within the range of the light, the tree trunk blocks the light, thus forming a shadow on the ground.

[0012] S3. Use a measuring tape to draw a straight line parallel to the direction in which the light-emitting rope is set, keeping the measuring tape perpendicular to the shadow formed by the tree trunk.

[0013] S4. Determine the starting and ending points on the measuring tape;

[0014] S5. Let L be the distance between the starting point and the ending point. Measure the length (li) of the shadow formed by each tree trunk between the starting point and the ending point.

[0015] S6. Establish the formula:

[0016] S7, where SSR is... m SSR is the trunk lateral shading rate of a single measurement, SSR is the average value of the trunk lateral shading rate of the forest stand measured n times, li (cm) is the length of the shadow of each trunk on the measuring tape from the starting point to the ending point, L (cm) is the total length of the measuring tape from the starting point to the ending point, and i,m are 1, 2, 3, ..., n, which are the number of measurements.

[0017] S8. Based on the above formula, first calculate the trunk lateral shading rate SSR for a single measurement. m； The average value of the lateral shading rate of the tree trunk after n measurements is SSR.

[0018] Preferably, the measurement time is selected during a period of time in the forest when there is no direct sunlight, that is, a period of time when no tree shadows are formed. During this period, the trees will form clearly defined shadows under the supplemental lighting conditions.

[0019] Preferably, the rods are made of rigid material and the lifting height can be adjusted manually.

[0020] Preferably, the starting point of the measurement is based on the side of the first tree trunk shadow and the measuring tape, and the ending point is based on the side of the last tree trunk shadow.

[0021] Preferably, the measuring tape is positioned on the tree trunk shadow at a clear point along the edge of the shadow.

[0022] Preferably, after setting a single measurement point, the measurement point is changed, and the above operation is repeated to obtain SSR data for different points in the same area. m And SSR.

[0023] Compared with the prior art, the present invention provides a device and measurement method for calculating the lateral shading rate of tree trunks under forest canopy, which has the following beneficial effects:

[0024] This invention proposes a device and measurement method for calculating the lateral shading rate of tree trunks in forests. The device utilizes a main base rope, a flexible circuit board, a power supply connector for the circuit board, LED beads, and auxiliary tethering ropes to form a light source for illuminating the tree trunks and creating shadows. The distance L between the starting and ending points is measured, as is the length (li) of the shadow cast by each tree trunk between the starting and ending points. These values ​​are then substituted into a formula to calculate the lateral shading rate (SSR). m .

[0025] First, calculate the trunk lateral shading rate (SSR) for a single measurement. m； After n measurements, the average value of the lateral shading rate of the tree trunk (SSR) after the n measurements is obtained. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure in the embodiment;

[0028] Figure 2 This is a schematic diagram of the three-dimensional, bottom-view structure in the embodiment;

[0029] Figure 3 This is a schematic diagram of the method used in the embodiment.

[0030] In the diagram: 1. Main base rope; 2. Flexible circuit board; 3. Circuit board power supply connector; 4. LED beads; 5. Auxiliary tether rope. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] like Figure 1-3 As shown in the figure, this embodiment proposes a device for calculating the lateral shading rate of tree trunks under forests, including a main base rope 1. The main base rope 1 is a flat rope made of plastic. Both ends of the main base rope 1 are provided with through holes, through which the main base rope 1 can be easily straightened and fixed to the external base.

[0033] A flexible circuit board 2 is provided on the surface of the main base rope 1. Several groups of LED beads 4 are arranged on the surface of the flexible circuit board 2. The flexible circuit board 2 connects the LED beads 4 in parallel to supply power to the LED beads 4. A circuit board power supply connector 3 is provided at the end of the flexible circuit board 2. The circuit board power supply connector 3 supplies power to the flexible circuit board 2 by connecting to an external power source. The power supply method can be DC or USB power supply. After being powered on, the LED beads 4 on the flexible circuit board 2 emit light. The light emitted by the LED beads 4 is horizontally emitted in the direction in which the LED beads 4 are facing. The light emitted by the several groups of LED beads 4 arranged in parallel can maintain a straight illumination angle. At a certain distance, the illumination by the LED beads 4 can keep the shadow formed by the illuminated tree trunk in a normal vertical state, avoiding the problem of the tilted distribution of the shadow of the tree trunk under close illumination by a point light source.

[0034] Meanwhile, an auxiliary tie rope 5 is provided on the back of the main base rope 1. After the auxiliary tie rope 5 is wound, the main base rope 1 can be fixed by the auxiliary tie rope 5 to prevent the main base rope 1 from unraveling when stored. In the unfolded state, the auxiliary tie rope 5 can help fix the middle part of the main base rope 1.

[0035] During the measurement, the timing was chosen when the light was very dim in the forest, and the trees cast clearly defined shadows under the light conditions;

[0036] The main base rope 1 is suspended on any pole in a parallel manner. The main base rope 1 is completely attached to the pole. The LED beads 4 on the main base rope 1 maintain the same orientation under the support of the pole.

[0037] An external power supply is used to power the flexible circuit board 2 through the power supply connector 3 of the circuit board. After the LED beads 4 on the flexible circuit board 2 are powered on, they emit approximately parallel light. Within the range of the light, the tree trunk blocks the light, thus forming a shadow on the ground.

[0038] Use a measuring tape to draw a straight line parallel to the direction in which the light-emitting rope is set, keeping the measuring tape perpendicular to the shadow formed by the tree trunk;

[0039] Determine the starting and ending points on the measuring tape;

[0040] Let L be the distance between the starting point and the ending point. Measure the length (li) of the shadow cast by each tree trunk between the starting point and the ending point.

[0041] Establish the formula:

[0042] In the formula SSR m SSR is the trunk lateral shading rate of a single measurement, SSR is the average value of the trunk lateral shading rate of the forest stand measured n times, li (cm) is the length of the shadow of each trunk on the measuring tape from the starting point to the ending point, L (cm) is the total length of the measuring tape from the starting point to the ending point, and i,m are 1, 2, 3, ..., n, which are the number of measurements.

[0043] Based on the above formula, first calculate the trunk lateral shading rate SSR for a single measurement. m； After n measurements, the average value of the lateral shading rate of the tree trunk (SSR) after the n measurements;

[0044] After setting up a single measurement point, change the measurement point and repeat the above operation to obtain SSR data for different points in the same area. m And SSR.

[0045] In the description of this invention, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of embodiments of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0047] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for calculating the lateral shading rate of tree trunks under forest canopy, characterized in that, The device for calculating the lateral shading rate of tree trunks under the forest includes a main base rope (1), a flexible circuit board (2) is provided on the surface of the main base rope (1), and several sets of LED beads (4) are arranged on the surface of the flexible circuit board (2). The measurement method includes the following steps: S1. The main base rope (1) is suspended on any pole in a parallel arrangement. The main base rope (1) is completely attached to the pole. The LED beads (4) on the main base rope (1) are kept in the same orientation under the support of the pole. S2. Power is supplied to the flexible circuit board (2) on the main base rope (1) through the power supply connector (3) of the circuit board. The LED beads (4) on the flexible circuit board (2) emit approximately parallel light after being powered on. Within the range of the light, the tree trunk blocks the light, thus forming a shadow on the ground. S3. Use a measuring tape to draw a straight line parallel to the direction of the main base rope (1), and keep the measuring tape perpendicular to the shadow formed by the tree trunk; S4. Determine the starting and ending points on the measuring tape; S5. Let L be the distance between the starting point and the ending point. Measure the length (li) of the shadow formed by each tree trunk between the starting point and the ending point. S6. Establish the formula: S7, where SSR is... m SSR is the trunk lateral shading rate of a single measurement, SSR is the average value of the trunk lateral shading rate of the forest stand measured n times, li (cm) is the length of the shadow of each trunk on the measuring tape from the starting point to the ending point, L (cm) is the total length of the measuring tape from the starting point to the ending point, and i,m are 1, 2, 3, ..., n, which are the number of measurements. S8. Based on the above formula, first calculate the trunk lateral shading rate SSR for a single measurement. m； The average value of the lateral shading rate of the tree trunk after n measurements is SSR. Before the measurement, the measurement time is selected during a period of time in the forest without direct sunlight, that is, a period of time when tree shadows will not be formed. During this period, the trees will form clearly defined shadows under the supplemental lighting conditions.

2. The method for calculating the lateral shading rate of tree trunks under forest cover according to claim 1, characterized in that, The poles are made of rigid material and the lifting height can be adjusted manually.

3. The method for calculating the lateral shading rate of tree trunks under forest cover according to claim 1, characterized in that, The starting point of the measurement is based on the side of the first tree trunk shadow and the measuring tape, and the ending point is based on the side of the last tree trunk shadow and the measuring tape.

4. The method for calculating the lateral shading rate of tree trunks under forest cover according to claim 1, characterized in that, The measuring tape is placed on the tree trunk's shadow at a point where the edge of the shadow is clearly visible.

5. The method for calculating the lateral shading rate of tree trunks under forest cover according to claim 1, characterized in that, After setting up a single measurement point, change the measurement point and repeat the above operation to obtain SSR data for different points in the same area. m And SSR.

6. An apparatus for calculating the lateral shading rate of tree trunks under forest canopies using the measurement method described in any one of claims 1-5, comprising a main base rope (1), characterized in that, The surface of the main base rope (1) is provided with a flexible circuit board (2), and the surface of the flexible circuit board (2) is arranged with several groups of LED beads (4). The light emitted by the LED beads (4) is horizontally emitted in the direction of the LED beads (4). After the several groups of LED beads (4) are lit, the light emitted maintains a straight irradiation angle. At a certain distance, the shadow formed by the irradiated tree trunk is kept in a normal vertical state by the irradiation of the LED beads (4), avoiding the tilted distribution of the shadow of the tree trunk under close irradiation of the point light source.

7. The apparatus for calculating the lateral shading rate of tree trunks under forest cover according to claim 6, characterized in that, The flexible circuit board (2) is provided with a circuit board power supply connector (3) at its end.

8. The apparatus for calculating the lateral shading rate of tree trunks under forest cover according to claim 6, characterized in that, The back of the main base rope (1) is provided with an auxiliary tie rope (5), and both ends of the main base rope (1) are provided with through holes.

Images