Chlorophyll luminoscope capable of dark adaptation

Abstract

The utility model discloses a chlorophyll luminoscope capable of dark adaptation, which comprises a light shield which is of a lightproof hollow structure, the top of the light shield is provided with a measuring hole, and the bottom of the light shield is provided with a hollow part; the leaf pressing assembly is arranged in the light shield and is used for pressing the to-be-detected plant penetrating through the hollow part to a plane; the fluorescence measurement part is arranged above the measurement hole and is used for carrying out dark adaptation and measurement on the plant to be measured through the measurement hole; the baffle plate is movably arranged on the light shield and is positioned between the measuring hole and the hollow part; when the baffle plate is located at the first position, the baffle plate can shield the measuring hole; and when the baffle plate is located at the second position, no shielding exists between the measuring hole and the hollow part. According to the utility model, large samples such as whole plants or lawns can be subjected to dark adaptation and measurement, and the application range of the luminoscope is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of plant physiological measurement equipment, and further relates to a chlorophyll fluorometer capable of dark adaptation. Background Art

[0002] A chlorophyll fluorometer can measure the chlorophyll fluorescence of plant leaves. Sometimes it is necessary to measure under a light environment, and sometimes it is necessary to measure under a dark environment. When it is necessary to measure under darkness, indoors, the lighting can be turned off and the plant can be covered with a black cloth; outdoors, a dark adaptation clip can be used, but the dark adaptation clip is only applicable to small materials such as single leaves and cannot perform dark adaptation and measurement on larger samples such as a whole plant or a lawn.

[0003] Therefore, it is necessary to design a chlorophyll fluorometer that can perform dark adaptation and measurement on larger plants or lawns. Summary of the Utility Model

[0004] Aiming at the above technical problems, the purpose of the utility model is to provide a chlorophyll fluorometer capable of dark adaptation, which can perform dark adaptation and measurement on larger samples such as a whole plant or a lawn, and expands the application range of the fluorometer.

[0005] In order to achieve the above purpose, the utility model provides a chlorophyll fluorometer capable of dark adaptation, comprising:

[0006] A light-shielding cover, the light-shielding cover is an opaque hollow structure, a measurement hole is arranged at the top of the light-shielding cover, and a hollow part is arranged at the bottom of the light-shielding cover;

[0007] A leaf pressing assembly, the leaf pressing assembly is arranged in the light-shielding cover and is used for pressing the plant to be measured passing through the hollow part onto a plane;

[0008] A fluorescence measurement part, the fluorescence measurement part is arranged above the measurement hole and is used for performing dark adaptation and measurement on the plant to be measured through the measurement hole;

[0009] A baffle, the baffle is movably arranged in the light-shielding cover and is located between the measurement hole and the hollow part;

[0010] When the baffle is in the first position, the baffle can block the measurement hole;

[0011] When the baffle is in the second position, there is no block between the measurement hole and the hollow part.

[0012] In some embodiments, a positioning frame is arranged at the top of the light-shielding cover, and the fluorescence measurement part is adaptively arranged in the positioning frame.

[0013] In some embodiments, a mounting member is provided inside the light-shielding cover, and the leaf pressing assembly is mounted inside the light-shielding cover through the mounting member.

[0014] In some embodiments, the mounting member is a bracket, the bracket is mounted inside the light-shielding cover, and the leaf pressing assembly is fixed to the bracket.

[0015] In some embodiments, the mounting member is a telescopic mechanism, the telescopic mechanism is mounted inside the light-shielding cover, the leaf pressing assembly is fixed to the telescopic mechanism, and is located at one end of the telescopic mechanism close to the hollow portion, so that the telescopic mechanism can drive the leaf pressing assembly to move in a direction close to or away from the hollow portion.

[0016] In some embodiments, the telescopic mechanism is an elastic member, the top of the elastic member is fixed to the light-shielding cover, and the leaf pressing assembly is fixed to the bottom of the elastic member;

[0017] The leaf pressing assembly is a transparent mesh structure or a transparent plate structure.

[0018] In some embodiments, the telescopic mechanism includes a slide rail, a slider and a limiting member, the slide rail is fixed to the light-shielding cover and is arranged along the height direction of the light-shielding cover, the slider is adaptively connected to the slide rail, the leaf pressing assembly is fixed to the slider, the leaf pressing assembly can reciprocate along the axial direction of the slide rail with the slider, and the limiting member is respectively connected to the slide rail and the slider for controlling the connection relationship between the slide rail and the slider;

[0019] The leaf pressing assembly is a transparent mesh structure or a transparent plate structure.

[0020] In some embodiments, the leaf pressing assembly is fixed to the bottom of the light-shielding cover, and the leaf pressing assembly is a transparent mesh structure or a transparent plate structure.

[0021] In some embodiments, a notch is provided on one side of the light-shielding cover, the baffle is adaptively inserted into the notch, and a pulling portion is provided at one end of the baffle away from the light-shielding cover;

[0022] When the pulling portion is driven to insert the baffle into the inside of the light-shielding cover, the baffle can block the measurement hole;

[0023] When the pulling portion is driven to move the baffle out of the inside of the light-shielding cover, there is no blockage between the measurement hole and the hollow portion.

[0024] In some embodiments, it further includes:

[0025] Positioning base, the positioning base is provided with a through hole and a fixing hole, the through hole is used for a plant to be measured to pass through, and the fixing hole is used for a fixing member to pass through to fix the positioning base on the ground;

[0026] The light-shielding cover is detachably arranged on the positioning base, and the through hole is opposite to the hollow part.

[0027] Compared with the prior art, the dark-adaptable chlorophyll fluorometer provided by the present utility model has the following

[0028] Beneficial effects:

[0029] In the present utility model, by arranging a leaf pressing assembly in the light-shielding cover to press the plant to be measured onto a plane, the uniformity of fluorescence measurement can be improved; by arranging an openable and closable baffle in the light-shielding cover, the baffle plays a light-shielding role when closed, and the internal plant to be measured can be exposed for measurement when the baffle is opened. A positioning frame is arranged on the upper part of the baffle, which is adapted to the size of the fluorescence measurement part, and the fluorescence measurement part can be placed and aligned with the measurement hole, which can ensure that no light leaks during the whole measurement process and improve the accuracy of measurement data; by arranging a positioning base, the same position or the same plant to be measured can be measured multiple times; this chlorophyll fluorometer can perform dark adaptation and measurement on the whole plant or larger samples such as lawns, expanding the application range of the fluorometer. Description of the Drawings

[0030] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the present utility model in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0031] Figure 1 It is a schematic structural diagram of the dark-adaptable chlorophyll fluorometer of the preferred embodiment of the present utility model.

[0032] Explanation of the reference numerals in the drawings:

[0033] Light-shielding cover 1, measurement hole 11, positioning frame 12, leaf pressing assembly 2, mounting member 21, leaf pressing net 22, fluorescence measurement part 3, baffle 4, pulling part 41, positioning base 5, through hole 51, fixing hole 52, plant to be measured 6. Detailed Description of the Preferred Embodiment

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the specific implementation manners of the present utility model will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation manners can also be obtained.

[0035] For the sake of simplicity of the drawings, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some drawings, only one of the components with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean "more than one" situation.

[0036] It should also be further understood that the term "and / or" used in the description of the present application and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0037] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] In addition, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0039] In one embodiment, referring to the appended Figure 1 description, a dark-adaptable chlorophyll fluorometer provided by the present utility model includes: a light-shielding cover 1, a leaf pressing assembly 2, a fluorescence measurement unit 3, and a baffle 4. The light-shielding cover 1 is an opaque hollow structure. A measurement hole 11 is provided at the top of the light-shielding cover 1, and a hollowed-out part is provided at the bottom of the light-shielding cover 1. The leaf pressing assembly 2 is arranged inside the light-shielding cover 1 and is used to press the plant 6 to be measured passing through the hollowed-out part onto a plane. The fluorescence measurement unit 3 is arranged above the measurement hole 11 and is used to perform dark adaptation and measurement on the plant 6 to be measured through the measurement hole 11. The baffle 4 is movably arranged in the light-shielding cover 1 and is located between the measurement hole 11 and the hollowed-out part; when the baffle 4 is in the first position, the baffle 4 can block the measurement hole 11; when the baffle 4 is in the second position, there is no blockage between the measurement hole 11 and the hollowed-out part.

[0040] In this embodiment, by arranging a leaf pressing assembly 2 inside the light-shielding cover 1 to press the plant 6 to be measured onto a flat surface, the uniformity of fluorescence measurement can be improved; by arranging an openable and closable baffle 4 inside the light-shielding cover 1, the baffle 4 functions as a light shield when closed and can expose the internal plant 6 to be measured for measurement when opened, ensuring no light leakage during the whole measurement process and improving the accuracy of measurement data; this chlorophyll fluorometer can perform dark adaptation and measurement on a whole plant or a relatively large sample such as a lawn, expanding the application range of the fluorometer.

[0041] In one embodiment, referring to the attached drawings of the specification Figure 1 , a positioning frame 12 is arranged at the top of the light-shielding cover 1, and the fluorescence measurement part 3 is adaptively arranged inside the positioning frame 12. The fluorescence measurement part 3 refers to a device or a partial structure of a device that can perform chlorophyll fluorescence measurement on the plant 6 to be measured. If the part of the fluorescence measurement part 3 connected to the positioning frame 12 is a square structure, then the positioning frame 12 is a square groove, enabling the fluorescence measurement part 3 to be adaptively placed inside the positioning frame 12. At this time, the fluorescence measurement part is facing the measurement hole 11. By arranging the positioning frame 12, the loading and unloading efficiency of the fluorescence measurement part 3 and the light-shielding cover 1 can be effectively improved.

[0042] The leaf pressing assembly 2 is a transparent mesh structure or a transparent plate structure. For example, the leaf pressing assembly 2 is a leaf pressing net 22, and the leaf pressing net 22 can be made of transparent fine nylon thread material, which does not affect the fluorescence signal measurement. The leaf pressing assembly 22 can be directly arranged at the bottom of the light-shielding cover 1, or the leaf pressing assembly 22 can be arranged inside the lower part of the light-shielding cover 1 by using a mounting part.

[0043] Specifically, the light-shielding cover 1 is a trapezoidal columnar structure, a cuboid structure, a cylindrical structure, a conical columnar structure, etc. The bottom of the light-shielding cover 1 is an open structure, or a bottom plate is arranged at the bottom of the light-shielding cover 1, and a hollow part is opened on the bottom plate. The mounting part 21 is a bracket, and the bracket is installed inside the light-shielding cover 1, and the leaf pressing assembly 2 is fixed on the bracket. The bracket has a hollow structure, so that there is no obstruction between the measurement hole 11 and the plant 6 to be measured. The bracket can be fixed at the bottom of the light-shielding cover 1, the bracket can be fixed on the side wall of the light-shielding cover 1, the bracket can be fixed on the top wall of the light-shielding cover 1, as long as the leaf pressing net 22 can be set at a preset distance from the hollow part, and this distance can be set according to actual needs. By arranging the leaf pressing net 22, the plant 6 to be measured can be pressed onto a flat surface, and the uniformity of fluorescence measurement can be improved.

[0044] Furthermore, the mounting member is a telescopic mechanism which is installed inside the light-shielding cover 1. The leaf pressing assembly 2 is fixed to the telescopic mechanism and located at one end of the telescopic mechanism close to the hollow portion, so that the telescopic mechanism can drive the leaf pressing assembly 2 to move towards or away from the hollow portion. By setting the mounting member as a telescopic mechanism, the distance between the leaf pressing net 22 and the plant 6 to be measured can be adjusted, so that the dark-adaptable chlorophyll fluorometer can be applied to plants 6 to be measured at different heights, expanding the application range of the fluorometer.

[0045] Exemplarily, the telescopic mechanism is an elastic member. The top of the elastic member is fixed to the light-shielding cover 1, and the leaf pressing net 22 is fixed to the bottom of the elastic member. The elastic member can be a spring. The hollow portion in the middle of the spring is directly opposite to the measurement hole 11 and the hollow portion, so that the spring does not block the fluorescence measurement part 3 and the plant 6 to be measured. The elastic member can also be several springs or elastic columns. The several springs or elastic columns are arranged at intervals, and a hollow portion is formed by surrounding the several springs or elastic columns. The hollow portion is directly opposite to the measurement hole 11 and the hollow portion, so that the elastic member does not block the fluorescence measurement part 3 and the plant 6 to be measured. Of course, the elastic member can also be set to other structures as long as the above functions can be achieved. The elastic coefficient of the elastic member can be set according to actual needs, so that the elastic force of the elastic member can drive the leaf pressing net 22 to press the plant 6 to be measured onto a plane, but not damage the plant 6 to be measured.

[0046] Exemplarily, the telescopic mechanism includes a slide rail, a slider and a limiting member. The slide rail is fixed to the top, bottom or side wall of the light-shielding cover 1 and is arranged along the height direction of the light-shielding cover 1. The slider is adaptively connected to the slide rail. The leaf pressing net 22 is fixed to the slider, and the leaf pressing net 22 can reciprocate along the axial direction of the slide rail with the slider. The limiting member is respectively connected to the slide rail and the slider and is used to control the connection relationship between the slide rail and the slider so that the slide rail and the slider maintain a fixed connection or a slidable relative connection. Of course, the telescopic mechanism can also be set to other structures as long as the above functions can be achieved.

[0047] In one embodiment, referring to the attached drawings of the specification Figure 1 , a notch is provided on one side of the light-shielding cover 1. The baffle 4 is adaptively inserted into the notch. A pulling part 41 is provided at one end of the baffle 4 away from the light-shielding cover 1. A protrusion or a slot hole is provided on the pulling part 41 for easy pushing and pulling by hand. When the pulling part 41 is driven to insert the baffle 4 into the light-shielding cover 1, the baffle 4 can block the measurement hole 11, so that the inside of the light-shielding cover 1 is a dark environment. When the pulling part 41 is driven to move the baffle 4 out of the light-shielding cover 1, there is no blockage between the measurement hole 11 and the hollow portion, so that the fluorescence measurement part 3 can measure the plant 6 to be measured through the measurement hole 11.

[0048] In this embodiment, by providing a switchable baffle 4 inside the light-shielding cover 1, the baffle 4 functions as a light shield when closed, and when the baffle 4 is pulled open, the internal plant to be measured can be exposed for measurement. A positioning frame 12 is provided at the upper part of the baffle 4, and the size of the positioning frame 12 is adapted to that of the fluorescence measurement unit 3, so that the fluorescence measurement unit 3 can be placed and aligned with the measurement hole 11. First, place the fluorescence measurement unit 3, and then pull open the baffle 4 for measurement, which can ensure that no light leaks during the entire measurement process and improve the accuracy of the measurement data.

[0049] In one embodiment, referring to the attached drawings of the specification Figure 1 The dark-adaptable chlorophyll fluorometer further includes: a positioning base 5, the positioning base 5 is provided with a through hole 51 and a fixing hole 52. The through hole 51 is used for the plant 6 to be measured to pass through, and the fixing hole 52 is used for a fixing member to pass through to fix the positioning base 5 to the ground; the light-shielding cover 1 is detachably arranged on the positioning base 5, and the through hole 51 is arranged opposite to the hollow part.

[0050] In this embodiment, by providing the positioning base 5, the positioning base 5 can be fixed to the ground, and a hole is opened in the middle of the positioning base 5, which can expose the grass or low-growing plants to be measured; fixing holes 52 are provided around the positioning base 5, and ground nails can be inserted for fixation. The positioning base 5 is mainly used for marking and positioning plants in the wild, so that the same plant at the same position can be measured again when needed.

[0051] In the present utility model, by providing a leaf pressing assembly inside the light-shielding cover to press the plant to be measured onto a plane, the uniformity of fluorescence measurement can be improved; by providing a switchable baffle inside the light-shielding cover, the baffle functions as a light shield when closed, and when the baffle is pulled open, the internal plant to be measured can be exposed for measurement. A positioning frame is provided at the upper part of the baffle, which is adapted to the size of the fluorescence measurement unit, and the fluorescence measurement unit can be placed and aligned with the measurement hole, which can ensure that no light leaks during the entire measurement process and improve the accuracy of the measurement data; by providing a positioning base, the same position or the same plant to be measured can be measured multiple times; this chlorophyll fluorometer can perform dark adaptation and measurement on a whole plant or a large sample such as a lawn, expanding the application range of the fluorometer; this chlorophyll fluorometer is not only simple in structure and convenient to use, but also low in manufacturing cost, good in effect, and high in comprehensive benefits.

[0052] In the above embodiments, the descriptions of each embodiment have their own focuses. For parts that are not described in detail or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0053] It should be noted that the above embodiments can be freely combined according to needs. The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A dark-adaptable chlorophyll fluorometer, characterized in that: include: A light shield, wherein the light shield is a light-proof hollow structure, a measuring hole is provided at the top of the light shield, and a hollow portion is provided at the bottom of the light shield; A leaf pressing assembly, which is disposed in the light shield and is used to press the plant to be tested passing through the hollow portion onto a plane; A fluorescence measuring unit, which is disposed above the measuring hole and is used to perform dark adaptation and measurement on the plant to be measured through the measuring hole; A baffle, which is movably disposed on the light shield and is located between the measuring hole and the hollow portion; When the baffle is in the first position, the baffle can cover the measuring hole; When the baffle is located at the second position, there is no obstruction between the measuring hole and the hollow portion.

2. The dark-adaptable chlorophyll fluorometer according to claim 1, characterized in that: A positioning frame is arranged on the top of the light shield, and the fluorescence measuring part is adapted to be arranged in the positioning frame.

3. The dark-adaptable chlorophyll fluorometer according to claim 1, characterized in that: A mounting piece is arranged inside the light shield, and the leaf pressing assembly is installed inside the light shield through the mounting piece.

4. The dark-adaptable chlorophyll fluorometer according to claim 3, characterized in that: The mounting member is a bracket, the bracket is installed inside the light shield, and the leaf pressing assembly is fixed on the bracket.

5. The dark-adaptable chlorophyll fluorometer according to claim 3, characterized in that: The mounting part is a telescopic mechanism, which is installed inside the sunshade. The leaf pressure assembly is fixed to the telescopic mechanism and is located at one end of the telescopic mechanism close to the hollow portion, so that the telescopic mechanism can drive the leaf pressure assembly to move towards or away from the hollow portion.

6. The dark-adaptable chlorophyll fluorometer according to claim 5, characterized in that: The telescopic mechanism is an elastic member, the top of the elastic member is fixed to the light shield, and the leaf pressing assembly is fixed to the bottom of the elastic member; The leaf pressing component is a transparent mesh structure or a transparent plate structure.

7. The dark-adaptable chlorophyll fluorometer according to claim 5, characterized in that: The telescopic mechanism includes a slide rail, a slider and a stopper. The slide rail is fixed to the light shield and is arranged along the height direction of the light shield. The slider is adaptively connected to the slide rail. The pressure leaf assembly is fixed to the slider. The pressure leaf assembly can reciprocate along the axis direction of the slide rail with the slider. The stopper is respectively connected to the slide rail and the slider for controlling the connection relationship between the slide rail and the slider. The leaf pressing component is a transparent mesh structure or a transparent plate structure.

8. The dark-adaptable chlorophyll fluorometer according to claim 1, characterized in that: The leaf pressing component is fixed to the bottom of the light shield, and the leaf pressing component is a transparent mesh structure or a transparent plate structure.

9. The dark-adaptable chlorophyll fluorometer according to claim 1, characterized in that: A notch is provided on one side of the light shield, the baffle is adapted to be inserted into the notch, and a handle is provided on one end of the baffle away from the light shield; When the handle is driven to insert the baffle into the interior of the light shield, the baffle can cover the measuring hole; When the handle is driven to move the baffle out of the interior of the light shield, there is no obstruction between the measuring hole and the hollow portion.

10. The dark-adaptable chlorophyll fluorometer according to claim 1, characterized in that: Also includes: A positioning base, wherein the positioning base is provided with a through hole and a fixing hole, wherein the through hole is used for the plant to be measured to pass through, and the fixing hole is used for the fixing piece to pass through so as to fix the positioning base on the ground; The light shield is detachably arranged on the positioning base, and the through hole is directly opposite to the hollow portion.

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