Auxiliary device for outdoor measurement of crop leaf reflectance spectrum

Abstract

The present invention relates to an outdoor auxiliary device for measuring crop leaf reflectance spectra, comprising an observation support panel, the upper end surface of which is provided with an observation area and an incident angle measurement area, with a first base and a second base respectively provided on the left and right sides of the observation area; a clamp assembly, located on the second base and used to clamp the leaf; a spectrometer fixing bracket, the ends of which are respectively connected to the first base and the second base, used to clamp the optical fiber head of the spectrometer, and the observation angle is adjustable; and an incident angle measurement assembly, located in the incident angle measurement area and used to measure the altitude and azimuth angles of solar incidence. The present invention consists of four parts: an observation support panel equipped with a leaf clamp, a spectrometer fixing bracket with an adjustable observation angle, an incident angle measurement assembly, and a bracket. The present invention can maintain the same incident angle and observation angle across multiple measurements, providing a more consistent experimental environment for crop remote sensing spectral observation.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary equipment for leaf reflectance spectrum measurement, in particular to an auxiliary device for outdoor measurement of crop leaf reflectance spectrum. Background Art

[0002] Crop spectroscopy, with its advantages of simplicity, speed, high accuracy, and non-destructive measurement, has become an important means of monitoring crop growth and nutritional information. Crop reflectance spectroscopy plays an important role in the construction of spectral transmission models and remote sensing inversion models.

[0003] Traditional outdoor crop spectral acquisition requires a person to hold a handheld spectrometer and use it to directly measure crop leaves or canopies (multiple leaves). When measuring multiple leaves, it is difficult to keep the spectrometer's observation angle and distance from the leaves consistent, resulting in poor consistency in the experimental environment, increased errors in experimental results, and difficulties in subsequent data processing and model construction. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of traditional crop reflectance spectrum measurement and develop an outdoor crop leaf reflectance spectrum measurement auxiliary device in combination with existing spectrometers. The device consists of an observation support panel equipped with a leaf clamp, a spectrometer fixing bracket with adjustable observation inclination, an incident angle measurement component, and a bracket. It can maintain the same incident angle and observation angle for multiple measurements, providing a more consistent experimental environment for crop remote sensing spectral observation. The specific technical solution is as follows:

[0005] The device for outdoor measurement of crop leaf reflectance spectrum comprises an observation bearing panel, wherein the upper end surface of the observation bearing panel is provided with an observation area and an incident angle measurement area, and a first base and a second base are respectively provided on the left and right sides of the observation area;

[0006] a clamp assembly, the clamp assembly being located on the second base and being used for clamping the blade;

[0007] A spectrometer fixing bracket, the two ends of which are connected to the first base and the second base respectively, and are used to hold the optical fiber head of the spectrometer, and the observation inclination angle is adjustable;

[0008] An incident angle measuring component is located in the incident angle measuring area and is used to measure the altitude angle and azimuth angle of solar incidence.

[0009] Preferably, the spectrometer fixing bracket includes a fixing plate, connecting rods are respectively provided at both ends of the fixing plate, connecting shaft cylinders are respectively provided on the outer sides of the first base and the second base, the other ends of the two connecting rods are respectively connected to the connecting shaft cylinders through bearings, and the upper end surface of the fixing plate is parallel to the length direction of the connecting rods.

[0010] Preferably, a semicircular angle ruler is coaxially provided on the connecting shaft cylinder located on the first base.

[0011] Preferably, a holding assembly for holding the optical fiber head is provided in the middle of the upper end surface of the fixing plate, and the clamping assembly includes a holding seat, a first groove is provided in the middle of the upper end surface of the holding seat, and the holding seat is located on the left and right sides of the first groove, and a sliding cavity is provided inside, and a slider is provided in the sliding cavity, and a sliding rod is connected to the side of the slider close to the first groove, and a spring is provided between the other side of the slider and the sliding cavity, the other end of the sliding rod is located in the first groove, and an arc plate is provided, and the optical fiber head is located between the two arc plates.

[0012] Preferably, a transition block is provided at one end of the arc-shaped plate away from the fixed plate.

[0013] Preferably, the incident angle measurement assembly includes an incident angle scale, and the observation bearing panel is provided with a vertical benchmark located at the axis of the incident angle scale.

[0014] Preferably, the portion of the observation area located between the first base and the second base is further provided with a low-reflection layer.

[0015] The Z-shaped connecting shaft is located on the left side of the second base and has a certain elasticity, and the right end of the Z-shaped connecting shaft passes through the left side wall of the placement slot, and the Z-shaped connecting shaft is movably connected to the left side wall of the placement slot. The Z-shaped connecting shaft is evenly arranged with three, and the left ends of the three Z-shaped connecting shafts are movably connected to the connecting plate. The right end of the Z-shaped connecting shaft located in the middle is connected to the front end of the control rod, and the left wall of the placement slot is provided with a limiting hole, and the other end of the control rod is provided with a limiting protrusion adapted for the limiting hole. A return spring is provided between the control rod and the bottom of the placement slot, and a plurality of splints are horizontally provided on the side of the connecting plate away from the second base along its length direction, and a sponge layer is provided on the lower end surface of the splint.

[0016] Preferably, a first internal gear is provided on the connecting rod corresponding to the first base, and the first internal gear is coaxially arranged with the connecting shaft cylinder, and a limiting component for limiting the rotation of the connecting rod is provided in the corresponding connecting shaft cylinder, and the limiting component includes a second internal gear, a guide block, and a push rod. The second internal gear is located at the innermost side of the connecting shaft cylinder and is coaxially arranged. An external gear is adapted to be connected to the second internal gear, and a push rod is provided on the axis of the external gear. The guide block is located in the inner middle part of the connecting shaft cylinder, and the other end of the push rod passes through the guide block and is located on the right side outside of the connecting shaft cylinder, and is provided with a handle. An opening is provided on the upper side of the right end of the connecting shaft cylinder, and a limiting half gear is provided on the push rod at the opening, and the upper end of the limiting half gear is adapted to be connected to the first internal gear through the opening. By pulling the push rod to the right, the outer gear can be separated from the second inner gear and the limiting half gear can be separated from the first inner gear, thereby realizing the rotation of the connecting rod. By pushing the push rod to the left, the outer gear can be engaged with the second inner gear and the limiting half gear can be engaged with the first inner gear, thereby preventing the rotation of the connecting rod.

[0017] Preferably, the lower end of the observation bearing panel is further provided with an incident angle adjustment assembly, the incident angle adjustment assembly comprising a base plate, a support frame provided on the left side of the upper end surface of the base plate, a spherical sleeve provided on the upper end of the support frame, a ball head adapted to be connected in the spherical sleeve, a first fastening bolt for limiting the displacement of the ball head provided on the left side of the spherical sleeve, a retractable support rod provided on the outer side of the ball head, the middle portion of the retractable support rod connected to the lower end of the observation bearing panel, a sleeve provided on the right end of the retractable support rod, a U-shaped connecting block movably connected to the outer side of the sleeve, the lower end of the U-shaped connecting block connected to the base plate via a height adjustment member, the height adjustment member comprising a sleeve, a sleeve rod sleeved on the upper end of the sleeve, the upper end of the sleeve rod connected to the lower end of the U-shaped connecting block, a second fastening bolt for limiting the displacement of the sleeve rod provided on the upper end of the sleeve. The incident angle adjustment assembly can realize the azimuth and altitude angles of the sun's illumination on the upper end surface of the observation bearing panel.

[0018] Preferably, in order to further improve the reliability of the clamp assembly when clamping the blade, that is, when the limiting protrusion is engaged with the limiting hole, the distance between the lower end of the clamping plate and the low-reflection layer is not less than the thickness of the sponge, and the elastic coefficient of the sponge is k, the thickness is h1, the length of the control rod is l, the angle between the length direction of the control rod and the horizontal plane is a1, the angle between the length direction of the control rod and the Z-shaped connecting axis is b1, the thickness of the low-reflection layer is h2, the thickness of the blade is h3, and the blade pressure F should satisfy the following relationship:

[0019]

[0020] In the above formula, the unit of F is N; the unit of k is N / m; the units of h1, h2, and h3 are mm; α is the relationship coefficient, and the value range is 1.0-1.22; the units of a1 and b1 are degrees.

[0021] Preferably, the present invention further discloses a method for using the crop leaf reflectance spectrum outdoor measurement auxiliary device, the specific steps comprising:

[0022] S1: Fix the crop leaves on the observation bearing panel through the clamp assembly;

[0023] S2: Fix the spectrometer on the bracket and clamp the optical fiber head of the spectrometer on the fixing plate through the clamping assembly;

[0024] S3: Measure the altitude and azimuth of the sun’s incidence using the incident angle measurement component, and adjust the incident altitude and azimuth using the incident angle adjustment component according to experimental needs;

[0025] S4: Adjust the observation inclination of the spectrometer fixing bracket and fix it with the limit assembly;

[0026] S5: After the observation and recording are completed, change to the next leaf and perform the same measurement steps.

[0027] In step S1, the specific working steps of the clamp assembly include: a: separating the limiting protrusion on the control rod from the limiting hole, so that the control rod can rotate upward through the action of the return spring;

[0028] b: The control rod rotates upward to drive the connecting plate to move forward and upward through the Z-shaped connecting shaft, and drives the splint to move;

[0029] c: After placing the blade in the observation area, press down the control rod to engage the limiting protrusion with the limiting hole. The Z-shaped connecting shaft drives the connecting plate to move backward and downward, and drives the clamping plate to move to fix the blade.

[0030] In step S4, the specific working steps of the limiting assembly include: A: pulling the push rod to the right to separate the outer gear from the second inner gear and the limiting half gear from the first inner gear;

[0031] B: Adjust the inclination angle of the connecting rod by referring to the semicircular angle ruler;

[0032] C: Push the push rod to the left to engage the outer gear with the second inner gear, and engage the limit half gear with the first inner gear to prevent the rotation of the connecting rod and achieve limit.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) The present invention provides an auxiliary device for outdoor measurement of crop leaf reflectance spectra. The device consists of an observation support panel equipped with a leaf clamp, a spectrometer fixing bracket with an adjustable observation inclination angle, an incident angle measurement component, and a bracket. The device can maintain the same incident angle and observation angle for multiple measurements, providing a more consistent experimental environment for crop remote sensing spectral observation.

[0035] (2) The auxiliary device for outdoor measurement of crop leaf reflectance spectrum of the present invention can adjust the height of the clamp by setting a clamp assembly and operating the angle of the control lever, and can fix the clamp by cooperating with the limiting protrusion and the limiting hole, thereby achieving the clamping of the leaf and facilitating the clamping.

[0036] (3) The crop leaf reflectance spectrum outdoor measurement auxiliary device of the present invention can adjust the angle of the connecting rod by setting a limit component and pulling out the push rod for a certain distance. The connecting rod can be limited by restoring the push rod. The operation is simple and convenient for adjusting the observation inclination angle.

[0037] (4) The auxiliary device for outdoor measurement of crop leaf reflectance spectra of the present invention is provided with a clamping assembly. With a certain amount of manpower, the optical fiber head can be placed into the annular space formed by the two arc-shaped plates. The spring generates a force to restore the original state, which enables the arc-shaped plates to tightly clamp the optical fiber head. The optical fiber head can be more easily placed into the annular space through the transition block.

[0038] (5) The crop leaf reflectance spectrum outdoor measurement auxiliary device of the present invention can adjust the azimuth and altitude angles of the sun's radiation on the observation bearing panel by setting an incident angle adjustment component, further meeting people's needs for measurement and experiment.

[0039] (6) The auxiliary device for outdoor measurement of crop leaf reflectance spectrum of the present invention can further improve the reliability of the clamp assembly when clamping the leaf by limiting the elastic coefficient of the sponge to k, the thickness to h1, the length of the control rod to l, the angle between the length direction of the control rod and the horizontal plane to a1, the angle between the length direction of the control rod and the Z-shaped connecting axis to b1, the thickness of the low-reflection layer to h2, the thickness of the leaf to h3 and the leaf pressure F, thereby avoiding excessive squeezing of the clamp plate and damage to the leaf. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic top view of the structure of the present invention.

[0041] Figure 2 The present invention Figure 1 A local enlarged schematic diagram of point A.

[0042] Figure 3 It is a left side schematic diagram of the present invention.

[0043] Figure 4 It is a schematic structural diagram of the limit assembly of the present invention.

[0044] Figure 5 It is a schematic structural diagram of the clamping assembly of the present invention.

[0045] Figure 6 The present invention Figure 5 A partial enlarged schematic diagram of point B.

[0046] Figure 7 It is a structural schematic diagram of the incident angle adjustment component of the present invention.

[0047] Figure: 1. Observation bearing panel; 2. Observation area; 3. Incident angle measurement area; 4. First base; 5. Second base; 61. Placement slot; 62. Control rod; 63. Z-shaped connecting shaft; 64. Connecting plate; 65. Clamping plate; 66. Positioning lug; 71. Connecting rod; 72. Fixing plate; 73. Connecting shaft cylinder; 74. Bearing; 75. First internal gear; 81. Incident angle scale; 82. Vertical mark; 91. Second internal gear; 92. Guide block; 93. Push rod; 94. External gear; 95. Positioning half gear; 96. Handle ;10. Clamping assembly;101. Clamping seat;102. First groove;103. Sliding cavity;104. Sliding block;105. Sliding rod;106. Spring;107. Arc plate;108. Transition block;11. Semicircular angle ruler;12. Fiber optic head;131. Base plate;132. Support frame;133. Spherical sleeve;134. Ball head;135. First fastening bolt;136. Retractable support rod;137. Sleeve;138. U-shaped connecting block;1390. Sleeve;1391. Sleeve rod;1392. Second fastening bolt. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] Example 1

[0050] like Figure 1-6 As shown, the outdoor auxiliary device for measuring the reflectance spectrum of crop leaves includes an observation carrying panel 1. The upper end surface of the observation carrying panel 1 is provided with an observation area 2 and an incident angle measurement area 3. The left and right sides of the observation area 2 are respectively provided with a first base 4 and a second base 5;

[0051] A clamp assembly, located on the second base 5 and used for clamping the blade;

[0052] A spectrometer fixing bracket, the two ends of which are connected to the first base 4 and the second base 5 respectively, and are used to hold the optical fiber head 12 of the spectrometer, and the observation inclination angle is adjustable;

[0053] The incident angle measurement component is located in the incident angle measurement area 3 and is used to measure the altitude angle and azimuth angle of the sun.

[0054] The spectrometer fixing bracket includes a fixing plate 72, and connecting rods 71 ​​are respectively provided at both ends of the fixing plate 72. Connecting shaft cylinders 73 are respectively provided on the outer sides of the first base 4 and the second base 5. The other ends of the two connecting rods 71 ​​are respectively connected to the connecting shaft cylinders 73 through bearings 74, and the upper end surface of the fixing plate 72 is parallel to the length direction of the connecting rods 71.

[0055] A semicircular angle ruler 11 is coaxially arranged on the connecting shaft cylinder 73 on the first base 4 to facilitate the adjustment of the observation inclination angle of the connecting rod.

[0056] A holding assembly 10 for holding the optical fiber head 12 is provided in the middle of the upper end surface of the fixing plate 72, and the holding assembly 10 includes a holding seat 101, and a first groove 102 is provided in the middle of the upper end surface of the holding seat. The holding seat is located on the left and right sides of the first groove, and a sliding cavity 103 is provided inside. A slider 104 is provided in the sliding cavity. The side of the slider close to the first groove is connected to a sliding rod 105, and a spring 106 is provided between the other side of the slider and the sliding cavity. The other end of the sliding rod is located in the first groove and is provided with an arc plate 107. The optical fiber head 12 is located between the two arc plates 107.

[0057] A transition block 108 is provided at one end of the arc-shaped plate 107 away from the fixed plate 72 .

[0058] The incident angle measurement assembly includes an incident angle scale 81. A vertical rod 82 is positioned at the axis of the observation panel 1. The incident angle scale 81 includes graduated lines indicating the solar azimuth and circular lines indicating the solar altitude. When the sun shines on the vertical rod 82, its shadow is cast onto the incident angle scale 81, thereby determining the incident angle of the sun on the observation panel 1.

[0059] The portion of the observation area 2 located between the first base 4 and the second base 5 is further provided with a low-reflection layer. The low-reflection layer can reduce the influence of the end surface reflection of the observation bearing panel on the reflection spectrum of the crop leaves.

[0060] Example 2

[0061] like Figure 1-7 As shown, on the basis of Example 1, the clamp assembly includes a placement slot 61, a control rod 62, a Z-shaped connecting shaft 63, and a connecting plate 64. The placement slot 61 is located on the upper end surface of the second base 5 and is arranged front and back along its length direction. The control rod 62 is located in the placement slot 61 and has a certain elasticity. The Z-shaped connecting shaft is located on the left side of the second base and has a certain elasticity. The right end of the Z-shaped connecting shaft passes through the left side wall of the placement slot 61, and the Z-shaped connecting shaft is movably connected to the left side wall of the placement slot 61. The Z-shaped connecting shafts are There are three Z-shaped connecting shafts, and the left ends of the three Z-shaped connecting shafts are movably connected to a connecting plate 64. The right end of the Z-shaped connecting shaft in the middle is connected to the front end of the control rod 62. A limiting hole is provided on the left side wall of the placement groove 61, and a limiting protrusion 66 adapted to the limiting hole is provided at the other end of the control rod. A return spring is provided between the control rod and the bottom of the placement groove 61. A plurality of splints 65 are horizontally provided on the side of the connecting plate 64 away from the second base 5 along its length direction, and the lower end surfaces of the splints 65 are provided with a sponge layer.

[0062] The height of the clamping plate can be adjusted by operating the angle of the control lever, and the clamping plate can be fixed by cooperating with the limiting protrusion and the limiting hole, thereby clamping the blade, which is convenient for clamping.

[0063] A first internal gear 75 is provided on the connecting rod 71 corresponding to the first base 4, and the first internal gear 75 is coaxially arranged with the connecting shaft cylinder 73. The corresponding connecting shaft cylinder 73 is provided with a limit assembly for limiting the rotation of the connecting rod. The limit assembly includes a second internal gear 91, a guide block 92, and a push rod 93. The second internal gear 91 is located at the innermost side of the connecting shaft cylinder 73 and is coaxially arranged. An external gear 94 is adapted to be connected to the second internal gear 91, and a push rod 93 is provided on the axis of the external gear 94. The guide block 92 is located in the inner middle part of the connecting shaft cylinder 73. The other end of the push rod 93 passes through the guide block 92 and is located on the right side outside of the connecting shaft cylinder 73, and is provided with a handle 96. An opening is provided on the upper side of the right end of the connecting shaft cylinder 73, and the push rod is provided with a limit half gear 95 at the opening. The upper end of the limit half gear is adapted to be connected to the first internal gear 75 through the opening. By pulling the push rod to the right, the outer gear 94 can be separated from the second inner gear and the limiting half gear 95 can be separated from the first inner gear, thereby realizing the rotation of the connecting rod. By pushing the push rod to the left, the outer gear 94 can be engaged with the second inner gear and the limiting half gear 95 can be engaged with the first inner gear, thereby preventing the rotation of the connecting rod.

[0064] By pulling out the push rod a certain distance, the angle of the connecting rod can be adjusted, and the connecting rod can be limited by restoring the push rod. The operation is simple and convenient for adjusting the observation inclination angle.

[0065] The lower end of the observation bearing panel 1 is also provided with an incident angle adjustment component, and the incident angle adjustment component includes a base plate 131, a support frame 132 is provided on the left side of the upper end surface of the base plate 131, and a spherical sleeve 133 is provided on the upper end of the support frame. A ball head 134 is adapted to be connected in the spherical sleeve 133, and a first fastening bolt 135 for limiting the displacement of the ball head is also provided on the left side of the spherical sleeve. A retractable support rod 136 is provided on the outside of the ball head, and the middle part of the retractable support rod 136 is aligned with the observation bearing panel. 1, the right end of the telescopic support rod 136 is provided with a sleeve 137, the outer side of which is movably connected to a U-shaped connecting block 138. The lower end of the U-shaped connecting block 138 is connected to the base plate 131 via a height adjustment member. The height adjustment member includes a sleeve 1390, the upper end of which is sleeved with a sleeve rod 1391, the upper end of which is connected to the lower end of the U-shaped connecting block 138. The upper end of the sleeve is also provided with a second fastening bolt 1392 to limit the displacement of the sleeve rod. The incident angle adjustment assembly can adjust the azimuth and elevation angles of the upper end surface of the solar radiation observation bearing panel 1.

[0066] In order to further improve the reliability of the clamp assembly when clamping the blade, that is, when the limiting protrusion is engaged with the limiting hole, the distance between the lower end of the clamping plate and the low-reflection layer is not less than the thickness of the sponge. The elastic coefficient of the sponge is k, the thickness is h1, the length of the control rod is l, the angle between the length direction of the control rod and the horizontal plane is a1, the angle between the length direction of the control rod and the Z-shaped connection axis is b1, the thickness of the low-reflection layer is h2, the thickness of the blade is h3, and the blade pressure F should satisfy the following relationship:

[0067]

[0068] In the above formula, the unit of F is N; the unit of k is N / m; the units of h1, h2, and h3 are mm; α is the relationship coefficient, and the value range is 1.0-1.22; the units of a1 and b1 are degrees.

[0069] Example 3

[0070] Based on Example 1, the present invention further discloses a method for using the crop leaf reflectance spectrum outdoor measurement auxiliary device, which specifically includes the following steps:

[0071] S1: Fix the crop leaves on the observation bearing panel through the clamp assembly;

[0072] S2: Fix the spectrometer on the bracket and clamp the optical fiber head of the spectrometer on the fixing plate through the clamping assembly;

[0073] S3: Measure the altitude and azimuth of the sun’s incidence using the incident angle measurement component, and adjust the incident altitude and azimuth using the incident angle adjustment component according to experimental needs;

[0074] S4: Adjust the observation inclination of the spectrometer fixing bracket and fix it with the limit assembly;

[0075] S5: After the observation and recording are completed, change to the next leaf and perform the same measurement steps.

[0076] In step S1, the specific working steps of the clamp assembly include: a: separating the limiting protrusion on the control rod from the limiting hole, so that the control rod can rotate upward through the action of the return spring;

[0077] b: The control rod rotates upward to drive the connecting plate to move forward and upward through the Z-shaped connecting shaft, and drives the splint to move;

[0078] c: After placing the blade in the observation area, press down the control rod to engage the limiting protrusion with the limiting hole. The Z-shaped connecting shaft drives the connecting plate to move backward and downward, and drives the clamping plate to move to fix the blade.

[0079] In step S2, the bracket is a prior art, patent number 201720648166.3, which discloses a portable spectrometer vehicle bracket. This application can use this bracket, and no further details will be given here.

[0080] In step S4, the specific working steps of the limiting assembly include: A: pulling the push rod to the right to separate the outer gear from the second inner gear and the limiting half gear from the first inner gear;

[0081] B: Adjust the inclination angle of the connecting rod by referring to the semicircular angle ruler;

[0082] C: Push the push rod to the left to engage the outer gear with the second inner gear, and engage the limit half gear with the first inner gear to prevent the rotation of the connecting rod and achieve limit.

[0083] The various technical features of the above-described embodiments can be arbitrarily combined. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-described embodiments merely illustrate the implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. Outdoor measurement auxiliary device for crop leaf reflectance spectrum, characterized in that: It comprises an observation bearing panel (1), wherein the upper end surface of the observation bearing panel (1) is provided with an observation area (2) and an incident angle measurement area (3), and the left and right sides of the observation area (2) are respectively provided with a first base (4) and a second base (5); A clamp assembly, the clamp assembly being located on the second base (5) and being used for clamping the blade; A spectrometer fixing bracket, the two ends of which are respectively connected to the first base (4) and the second base (5), and are used to hold the optical fiber head (12) of the spectrometer, and the observation inclination angle is adjustable; An incident angle measuring component, the incident angle measuring component is located in the incident angle measuring area (3) and is used to measure the altitude angle and azimuth angle of solar incidence; a clamp assembly, the clamp assembly being located on the second base and being used for clamping the blade; The Z-shaped connecting shaft is located on the left side of the second base and has a certain elasticity, and the right end of the Z-shaped connecting shaft passes through the left side wall of the placement slot, and the Z-shaped connecting shaft is movably connected to the left side wall of the placement slot. The Z-shaped connecting shaft is evenly arranged with three, and the left ends of the three Z-shaped connecting shafts are movably connected to the connecting plate. The right end of the Z-shaped connecting shaft located in the middle is connected to the front end of the control rod. The left side wall of the placement slot is provided with a limiting hole, and the other end of the control rod is provided with a limiting protrusion adapted for the limiting hole. A return spring is provided between the control rod and the bottom of the placement slot, and a plurality of splints are horizontally provided on the side of the connecting plate away from the second base along its length direction, and the lower end surfaces of the splints are all provided with a sponge layer.

2. The outdoor crop leaf reflectance spectrum measurement auxiliary device according to claim 1, characterized in that: The spectrometer fixing bracket includes a fixing plate (72), connecting rods (71) are respectively provided at both ends of the fixing plate (72), and connecting shaft cylinders (73) are respectively provided on the outer sides of the first base (4) and the second base (5), and the other ends of the two connecting rods (71) are respectively connected to the connecting shaft cylinders (73) through bearings (74), and the upper end surface of the fixing plate (72) is parallel to the length direction of the connecting rods (71).

3. The outdoor measurement auxiliary device for crop leaf reflectance spectrum according to claim 2, characterized in that: A semicircular angle ruler (11) is also coaxially provided on the connecting shaft cylinder (73) located on the first base (4).

4. The outdoor crop leaf reflectance spectrum measurement auxiliary device according to claim 2, characterized in that: A holding assembly (10) for holding the optical fiber head (12) is provided in the middle of the upper end surface of the fixing plate (72), and the holding assembly (10) includes a holding seat (101), a first groove (102) is provided in the middle of the upper end surface of the holding seat, and the holding seat is located on the left and right sides of the first groove, and a sliding cavity (103) is provided inside, and a slider (104) is provided in the sliding cavity. The side of the slider close to the first groove is connected to a sliding rod (105), and a spring (106) is provided between the other side of the slider and the sliding cavity. The other end of the sliding rod is located in the first groove and is provided with an arc plate (107), and the optical fiber head (12) is located between the two arc plates (107).

5. The outdoor measurement auxiliary device for crop leaf reflectance spectrum according to claim 4, characterized in that: A transition block (108) is provided at one end of the arc-shaped plate (107) away from the fixed plate (72).

6. The outdoor crop leaf reflectance spectrum measurement auxiliary device according to claim 1, characterized in that: The incident angle measurement assembly comprises an incident angle scale (81), and the observation bearing panel (1) is provided with a vertical mark rod (82) at the axis of the incident angle scale (81).

7. The outdoor crop leaf reflectance spectrum measurement auxiliary device according to claim 1, characterized in that: The portion of the observation area (2) located between the first base (4) and the second base (5) is also provided with a low-reflection layer.

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