Spectral data acquisition device for field soil and plant leaf spectral analysis

Abstract

The utility model provides a kind of spectrum data acquisition device for field soil and plant leaf spectrum analysis, it is composed of optical fiber probe support and sampling auxiliary module;Probe insertion through-hole for inserting optical fiber probe is opened on the body of optical fiber probe support;Sampling auxiliary module is fixed on the support body by fixed support, and comb plate can change angle by pivot to realize different working conditions;Optical fiber probe is then sleeved with heat shrink film at specified position to limit the fixed distance between probe end and target to be detected.The soil spectrum data can be collected before, and the soil is flattened and the large particle soil is removed by comb plate, so as to reduce the influence of particle size on diffuse reflection spectrum;Before collecting leaf spectrum data, the thickness of leaf can be clamped and fixed by comb plate, so as to reduce the influence of sample amount on diffuse reflection spectrum.Optical fiber probe is limited in closed space, and the distance relative to target to be detected is constant, so as to significantly improve the quality of spectrum data acquisition.

Description

Technical Field

[0001] This utility model belongs to the field of fiber optic data acquisition technology, specifically, it relates to a spectral data acquisition device for spectral analysis of soil and plant leaves in the field. Background Technology

[0002] The spectral acquisition device for field soil and plant leaves receives the reflection / transmission spectrum of the target soil or leaves through an optical fiber probe, converts the optical signal into an electrical signal, and outputs a continuous spectral curve. Its core is used for high-precision single-point spectral measurement.

[0003] In the field, the surface of soil may contain foreign objects such as plant debris and gravel, preventing fiber optic probes from accurately extracting the spectral information of the soil itself. The wilting state of plant leaves, resulting in uneven surfaces, can also prevent fiber optic probes from extracting effective spectral information from the leaves. Furthermore, the performance of the spectral acquisition device and its associated fiber optic probe in the field can fluctuate due to factors such as measurement location, angle, and distance, directly affecting the quality of the spectral data. Summary of the Invention

[0004] The purpose of this invention is to provide a spectral acquisition device for field soil and plant leaf spectral analysis. Through different working states of the matching comb plate, it can flatten the soil surface to reduce the influence of foreign particles on the diffuse reflectance spectrum, fix and clamp the plant leaves to ensure the flatness of the leaves and stabilize the detection distance between the leaves and the fiber optic probe, and limit the distance between the fiber optic probe and the target object by adding heat shrink film at a designated position of the fiber optic probe; thereby improving the spectral acquisition quality of field soil and plant leaves.

[0005] This utility model is achieved using the following technical solution: A spectral data acquisition device for field soil and plant leaf spectral analysis is proposed, comprising: Fiber optic probe bracket, including a bracket body and a probe insertion through hole opened on the bracket body; The sampling auxiliary module consists of a fixed bracket, a rotating shaft, and a comb plate. The comb plate is connected to the fixed bracket via the rotating shaft, and the fixed bracket fixes the entire sampling auxiliary module to the fiber optic probe bracket. The comb plate consists of a plate body and teeth at the ends of the plate body. Heat-shrink film is used to cover a designated position of the fiber optic probe. The designated position is such that when the fiber optic probe is inserted into the probe insertion hole from the upper end face of the bracket body, the end of the fiber optic probe does not protrude from the lower end face of the bracket body based on the heat-shrink film, so that the end of the fiber optic probe maintains a set distance relative to the probe insertion hole on the lower end face of the bracket body.

[0006] In some embodiments of this application, the upper and / or lower end surfaces of the support body are flat planes.

[0007] In some embodiments of this application, the fixed bracket is a frame bracket, which is fitted and fixed onto the bracket body.

[0008] In some embodiments of this application, the comb plate is made of carbon steel.

[0009] In some embodiments of this application, the spacing between the teeth of the comb plate is not greater than a specified spacing; the specified spacing is used to limit the maximum particle size of soil particles in the field.

[0010] Compared with existing technologies, the advantages and positive effects of this invention are as follows: The spectral data acquisition device for field soil and plant leaf spectral analysis proposed in this invention consists of a fiber optic probe bracket and a sampling auxiliary module. The bracket body of the fiber optic probe bracket has a probe insertion hole for inserting the fiber optic probe. The sampling auxiliary module is fixed to the bracket body by a fixing bracket, and the comb plate can change its angle via a rotating shaft to achieve different working states. The fiber optic probe is fitted with heat-shrink film at a designated position to limit the fixed distance between the probe tip and the target to be detected. Before acquiring soil spectral data, the soil can be leveled and large soil particles removed by the comb plate, thereby reducing the influence of particle size on the diffuse reflectance spectrum. Before acquiring leaf spectral data, the leaf of a fixed thickness can be held by the comb plate to reduce the influence of sample amount on the diffuse reflectance spectrum. The fiber optic probe is confined in a closed space and the distance to the target to be detected is constant, thus significantly improving the quality of spectral data acquisition.

[0011] Other features and advantages of this utility model will become clearer after reading the detailed description of the embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0012] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort. Figure 1 This application defines the support body and fiber optic probe structure of the spectral data acquisition device. Figure 2 This is a schematic diagram of the probe insertion through-hole and fiber optic probe assembly structure of the spectral data acquisition device proposed in this application. Figure 3 This application embodiment shows the fixed bracket mounting structure of the sampling auxiliary module and the 0-degree state of the comb plate; Figure 4 The comb plate of the spectral data acquisition device proposed in this application is in a 90-degree state. Figure 5 This is the comb plate of the spectral data acquisition device proposed in this application in a 180-degree reverse orientation. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0015] like Figures 1 to 5 As shown, the spectral data acquisition device for field soil and plant leaf spectral analysis proposed in this utility model includes: The fiber optic probe holder includes a holder body 11 and a probe insertion through-hole 12 formed on the holder body 11. The holder body 11 maintains at least its lower end face b as a flat plane. The probe insertion through-hole 12 is used to insert a fiber optic probe 4, so that the detection end of the fiber optic probe 4 can perform spectral acquisition from the hole position on the lower end face b of the holder body 11.

[0016] The sampling auxiliary module consists of a fixed bracket 21, a rotating shaft 22, and a comb plate 23. The comb plate 23 is connected to the fixed bracket 21 via the rotating shaft 22, and the fixed bracket 21 fixes the sampling auxiliary module 2 to the fiber optic probe bracket 1. The comb plate 23 consists of a plate body 231 and teeth 232 at the ends of the plate body. The fixed bracket 21, for example, is a frame bracket, fitted and fixed to the bracket body 11. The comb plate 23 is located on one side of the bracket body 11 and can change its relative angle with the bracket body 11 based on the rotation of the rotating shaft 22. Figures 3 to 5 The three angle states shown are: 0 degrees, 90 degrees, and 180 degrees.

[0017] Heat-shrink film 3 is applied to a designated location on the fiber optic probe 4. This designated location is such that when the fiber optic probe 4 is inserted into the probe insertion through-hole 12 from the upper end face a of the bracket body 11, the increased diameter of the heat-shrink film 3 prevents the end of the fiber optic probe 4 from protruding beyond the lower end face b of the bracket body 11. Furthermore, the detection end of the fiber optic probe 4 maintains a set distance D relative to the opening of the probe insertion through-hole 12 on the lower end face b of the bracket body 11. This set distance D is typically the optimal effective distance for spectral acquisition and can be determined based on the detection requirements or statistical values ​​of the fiber optic probe 4.

[0018] The following two specific embodiments illustrate in detail the implementation of spectral data acquisition using the spectral data acquisition device described above.

[0019] Example 1: Acquisition of spectral data of soil in the field.

[0020] (1) Rotate the comb plate 23 to the position shown in the figure. Figure 4 The 90-degree position shown makes the support body 11 and the comb plate 23 resemble a rake. The collector can hold the support body 11 and use the comb plate 23 to rake the soil surface in the field, thereby leveling the soil surface and removing large soil particles and other debris through the teeth 232.

[0021] A smooth soil surface ensures a constant distance between the soil surface and the fiber optic probe 4, guaranteeing consistency in spectral data acquisition. Removal of large particles reduces the impact of particle size on diffuse reflectance spectra, improving the quality of soil spectral data acquisition.

[0022] (2) Rotate the comb plate 23 to the position shown. Figure 3 The 0-degree state is shown, and the lower end face b of the support body 11 is placed on the flat surface of the soil to be tested.

[0023] (3) Insert the fiber optic probe 4, with the heat-shrink film 3 fitted at the designated position, into the probe insertion through-hole 12. The positional limitation effect of the heat-shrink film 3 ensures that the detection end of the fiber optic probe 4 maintains a fixed distance D from the flat soil surface, such as... Figure 2 As shown, this ensures the consistency of data collection.

[0024] Furthermore, the detection end of the fiber optic probe 4 is confined within a closed space of length D. This closed space eliminates ambient light interference for the fiber optic probe 4, thereby improving the quality of spectral data acquisition.

[0025] (4) Collect soil spectral data.

[0026] Example 2: Acquisition of spectral data from plant leaves.

[0027] (1) Smooth the plant leaves as a whole.

[0028] (2) Place the smoothed plant leaves onto the upper end face a or lower end face b of the support body 11, and flip the comb plate 23 until it is as shown. Figure 5 The reverse 180-degree position shown allows the comb plate 23 to clamp plant leaves of a fixed thickness onto the support body 11.

[0029] The planar clamping action of the comb plate 23 can reduce the influence of leaf thickness on diffuse reflectance spectrum and maintain a constant detection distance between the leaf and the detection end of the fiber optic probe 4, thereby improving the acquisition quality of plant leaf spectral data.

[0030] (3) Insert the fiber optic probe 4, with the heat-shrink film 3 fitted at the designated position, into the probe insertion through-hole 12. The positional limitation effect of the heat-shrink film 3 ensures that the detection end of the fiber optic probe 4 is as follows: Figure 2As shown, a fixed distance D is maintained from the blade surface, thus ensuring the consistency of data acquisition.

[0031] Furthermore, the detection end of the fiber optic probe 4 is confined within a closed space of length D, eliminating ambient light interference and thus improving the quality of spectral data acquisition.

[0032] (4) Collect spectral data of plant leaves.

[0033] It should be noted that the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A spectral data acquisition device for field soil and plant leaf spectral analysis, characterized in that, include: The fiber optic probe bracket includes a bracket body (11) and a probe insertion through hole (12) opened on the bracket body (11). The sampling auxiliary module consists of a fixed bracket (21), a rotating shaft (22), and a comb plate (23). The comb plate (23) is connected to the fixed bracket (21) via the rotating shaft (22). The fixed bracket (21) fixes the sampling auxiliary module (2) as a whole to the fiber optic probe bracket (1). The comb plate (23) consists of a plate body (231) and teeth (232) at the end of the plate body (231). Heat shrink film (3) is used to cover a designated position of the fiber optic probe (4). The designated position is such that when the fiber optic probe (4) is inserted into the probe insertion through hole (12) from the upper end face of the bracket body (11), the end of the fiber optic probe (4) is limited by the heat shrink film (3) to not protrude from the lower end face of the bracket body (11), so that the end of the fiber optic probe (4) maintains a set distance relative to the probe insertion through hole (12) on the lower end face of the bracket body (11).

2. The spectral data acquisition device for field soil and plant leaf spectral analysis according to claim 1, characterized in that, The upper and / or lower surfaces of the support body (11) are flat planes.

3. The spectral data acquisition device for field soil and plant leaf spectral analysis according to claim 1, characterized in that, The fixed bracket (21) is a frame bracket, which is fixed on the bracket body (11).

4. The spectral data acquisition device for field soil and plant leaf spectral analysis according to claim 1, characterized in that, The comb plate (23) is made of carbon steel.

5. The spectral data acquisition device for field soil and plant leaf spectral analysis according to claim 1, characterized in that, The spacing between the teeth (232) of the comb plate (23) is not greater than a specified spacing; the specified spacing is used to limit the maximum particle size of soil particles in the field.

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