Portable device for rapidly measuring plant nitrogen and chlorophyll

Abstract

The embodiment of the utility model provides a portable device for rapidly measuring plant nitrogen and chlorophyll, and the device comprises a housing which forms an installation space in an enclosing manner; the spectrum module is mounted in the mounting space, the spectrum module partially penetrates through the front end of the shell, and the spectrum module is used for acquiring spectrum data of a to-be-measured target object; the control module is mounted in the mounting space, and the control module is used for calculating the chlorophyll content and the nitrogen content of the target object to be detected based on the spectral data; the positioning module is mounted in the mounting space, the positioning module partially penetrates through the front end of the shell, and the positioning module is used for acquiring the position and distance information of a to-be-measured target object; and the fixing structure is arranged on the shell, and the fixing structure is used for detachably fixing the device on an external carrier. The device provided by the embodiment of the utility model is small in size, convenient to carry and very portable to use.

Description

Technical Field

[0001] The present application belongs to the technical field of rapid measurement of plant nitrogen and chlorophyll, and in particular relates to a portable device for rapid measurement of plant nitrogen and chlorophyll. Background Art

[0002] Managing crops in the field usually requires measuring nitrogen and chlorophyll. Nitrogen measurements are used to assess plant nutritional status, guide fertilization, and monitor and protect the environment. Chlorophyll measurements can, on the one hand, reflect plant health, and on the other hand, predict crop yields and assist in the diagnosis of pests and diseases. Conventional methods of obtaining plant nitrogen and chlorophyll require chemical testing, which requires destroying plant tissues. Testing is time-consuming, expensive, cumbersome, and pollutes the environment. At the same time, since the nutritional composition of plants is constantly changing during different stages of plant growth, it is difficult to obtain the nitrogen and chlorophyll content of plants in real time through chemical testing, which is not conducive to the effective formulation of field management plans.

[0003] However, the use of professional hyperspectral equipment can accurately obtain the nitrogen and chlorophyll content of plants. However, professional hyperspectral equipment is often bulky, has high manufacturing costs, slow imaging speeds, and is cumbersome to use. It cannot be carried around, and its actual application is greatly limited, making it difficult to carry to the field for field data collection.

[0004] Based on this, the current devices for measuring the nitrogen and chlorophyll content of plants are not convenient to use. There is an urgent need for a device that can achieve rapid, non-destructive and accurate measurement of nitrogen and chlorophyll in field plants to improve the efficiency of field plant planting status investigation and testing. Utility Model Content

[0005] In view of this, an embodiment of the present application provides a portable device for quickly measuring plant nitrogen and chlorophyll to solve the technical problem that existing devices for measuring the content of plant nitrogen and chlorophyll are not convenient to use.

[0006] In a first aspect, an embodiment of the present application provides a portable device for rapidly measuring plant nitrogen and chlorophyll, comprising:

[0007] a housing, wherein the housing encloses an installation space;

[0008] A spectral module is installed in the installation space, and the spectral module is partially provided through the front end of the housing, and the spectral module is used to obtain spectral data of the target object to be measured;

[0009] a control module installed in the installation space, the control module being configured to calculate the chlorophyll content and the nitrogen content of the target object based on the spectral data;

[0010] a positioning module, installed in the installation space, and partially passing through the front end of the housing, the positioning module being used to obtain position and distance information of a target object to be measured; and

[0011] A fixing structure is provided on the housing, and is used to detachably fix the device on an external carrier.

[0012] In some embodiments, the positioning module includes a visible light camera, and a camera head of the visible light camera is located at the front end of the housing and below the spectrum module.

[0013] In some embodiments, the spectral module includes a hyperspectral camera, and a camera of the hyperspectral camera is located at the front end of the housing;

[0014] The positioning module includes a visible light camera, the camera head of the visible light camera is located at the front end of the housing, and the camera head of the visible light camera and the camera head of the hyperspectral camera are spaced apart and arranged in the same direction.

[0015] In some embodiments, the spectral module further includes a photosensitive element and a spectroscopic film, wherein the spectroscopic film is coated on a side of the photosensitive element close to the camera head of the hyperspectral camera, and the spectroscopic film is used to separate light of a required wavelength band from entering the photosensitive element.

[0016] In some embodiments, the imaging distance of the hyperspectral camera is 2 to 5 meters.

[0017] In some embodiments, the desired wavelength range is 400-800 nm.

[0018] In some embodiments, the apparatus further comprises:

[0019] a circuit board, installed in the installation space, the circuit board being electrically connected to the spectrum module and the positioning module;

[0020] a data transmission module, installed in the installation space, the data transmission module being communicatively connected or electrically connected to the spectral module and the positioning module, respectively, and configured to transmit the spectral data acquired by the spectral module and the position and distance information of the target object to be measured acquired by the positioning module to a processing terminal; and

[0021] A power supply module is installed in the installation space, and the power supply module is used to supply power to the device.

[0022] In some embodiments, the device further includes an interface expansion module disposed on a side of the shell, and the interface expansion module includes at least one of a USB interface, a Type-C interface, a VGA interface, an HDMI interface, and an SD / MMC card slot.

[0023] In some embodiments, the device further includes a remote control module, which is in communication with the control module and is used to remotely control the control module to operate; the remote control module includes:

[0024] A display screen is used to display the position and distance information of the target object to be measured obtained by the positioning module;

[0025] A camera button is provided on the display screen, and is used to control the positioning module and the spectral module to take photos.

[0026] In some embodiments, the fixing structure is provided at the front end of the housing;

[0027] In some embodiments, the fixing structure is disposed on a side of the housing.

[0028] In some embodiments, the fixing structure is any one of a collar clip, a Velcro, and a hook.

[0029] The portable device for quickly measuring plant nitrogen and chlorophyll provided in the embodiment of the present application is compact and can be carried around through a fixed structure. The software on the mobile terminal can be used to control on-site photography and return results on-site, making it easy to use; rapid prediction: real-time prediction of the collected images, with a return time of about 100ms; easy operation: the device has a simple structure and is flexible and convenient to operate; wide range of applications: suitable for nitrogen measurement of different crops, with strong versatility; adaptable to complex working environments, no need for a storage table for control samples, which increases the convenience of using the tool; traditional spectral methods for calculating nitrogen and chlorophyll content are methods of collecting characteristic bands and then performing calculations. The present device collects the full band of 400-800nm ​​to calculate crop nitrogen and chlorophyll, with more sufficient data and more stable and reliable results. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 This is a schematic diagram of the structure of a portable device for rapid measurement of plant nitrogen and chlorophyll provided in an embodiment of the present application. Figure 1 ;

[0032] Figure 2Schematic diagram of the internal structure of a portable device for rapid measurement of plant nitrogen and chlorophyll provided in an embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of the structure of a portable device for rapid measurement of plant nitrogen and chlorophyll provided in an embodiment of the present application. Figure 2 ;

[0034] Figure 4 This is a schematic structural diagram of a portable device for rapidly measuring plant nitrogen and chlorophyll provided in another embodiment of the present application.

[0035] Among them, the figure numbers are:

[0036] 10. Housing; 100. Interface expansion module

[0037] 20. Spectral module; 21. Hyperspectral camera; 22. Photosensitive element;

[0038] 30. Control module;

[0039] 40. Positioning module;

[0040] 50. Fixed structure;

[0041] 60. Circuit board;

[0042] 70. Data transmission module; 71. Antenna;

[0043] 80. Power supply module;

[0044] 90. Remote control module; 91. Display screen; 92. Camera button. DETAILED DESCRIPTION

[0045] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the embodiments of the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the embodiments of the present application.

[0046] It should also be understood that the term "and / or" used in the description of the embodiments of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0047] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0048] It is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are used only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0049] In addition, in the description of the embodiments of the present application and the appended claims, the terms "first", "second", "third", and the like are used only for differentiation of description and cannot be understood as indicating or implying relative importance.

[0050] In the description of the embodiments of the present application, the reference "some embodiments" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiments are included in one or more embodiments of the present application. Therefore, the statements "in some embodiments", "in some embodiments", "in other some embodiments", "in further some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiments, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variations mean "including but not limited to", unless otherwise specifically emphasized. "Multiple" means two and more than two.

[0051] The embodiments of the present application provide a portable device for quickly measuring plant nitrogen and chlorophyll, as shown in Figures 1 to 4 The device includes a housing 10, a spectrum module, a control module 30, a positioning module 40 and a fixing structure 50.

[0052] The housing 10 encloses a mounting space;

[0053] The spectrum module is installed in the mounting space, and part of the spectrum module is arranged at the front end of the housing 10. The spectrum module is used to obtain spectral data of a target object to be measured.

[0054] The control module 30 is installed in the mounting space, and the control module 30 is used to calculate the chlorophyll content and nitrogen content of the target object to be measured based on the spectral data.

[0055] The positioning module 40 is installed in the installation space, and the positioning module 40 is partially provided at the front end of the housing 10. The positioning module 40 is used to obtain the position and distance information of the target object to be measured;

[0056] The fixing structure 50 is disposed on the housing 10 , and is used to detachably fix the device to an external carrier.

[0057] The portable device for quickly measuring plant nitrogen and chlorophyll provided in the embodiment of the present application is able to adapt to complex working environments compared to current measuring devices. It does not require a storage table to place or fix samples, which increases the convenience of using the device. The device can also be fixed on an external carrier through a fixing structure 50, specifically on the operator, or in the field, to achieve remote control, greatly improving the convenience of use.

[0058] In use, the installation space enclosed by the housing 10 provides sufficient space and physical protection for other components to ensure that the components in the housing 10 are not affected by the external environment. The target object to be measured can be any plant in the field, including but not limited to cotton, rapeseed and other economic crops.

[0059] In application, the positioning module 40 is used to locate the position and distance information of the target object to be measured, so that the spectral module can accurately obtain the spectral data of the target object to be measured. The specific working principle includes obtaining the position and distance information of the target object to be measured through the positioning module 40, and the control module 30 controls the spectral module to operate based on this information, thereby obtaining the spectral data of the target object to be measured, and then further processing (including transmission, analysis, display, etc.) The control module 30 is also used to coordinate the operation of various hardware components and execute preset program instructions. This enables automated operations, such as automatically adjusting parameters such as exposure time and focal length; controlling the data acquisition process; and handling abnormal situations.

[0060] In applications, the spectral module primarily utilizes traditional spectral methods to calculate nitrogen and chlorophyll content, capturing characteristic wavelengths and performing subsequent calculations. This device can capture the entire 400-800nm ​​wavelength band to calculate crop yields and chlorophyll, providing more comprehensive data and more stable and reliable results. In some embodiments, using traditional spectral methods to estimate nitrogen and chlorophyll content in plants is a non-destructive technique based on the characteristics of the reflectance spectrum of plant leaves. This method typically involves measuring light absorption or reflectance within a specific wavelength range, corresponding to the absorption peaks of chlorophyll or other pigments.

[0061] Here are the steps:

[0062] 1. Select the appropriate wavelength: Chlorophyll: It has obvious absorption peaks in the blue light (about 430-460nm) and red light (about 650-680nm) regions. Nitrogen: Although nitrogen itself does not have specific spectral characteristics, since nitrogen is one of the important components of chlorophyll synthesis, the nitrogen level can be indirectly estimated by chlorophyll content. The embodiment of the present application can obtain the 400-800nm ​​wavelength band, thereby covering the above wavelength range and improving the accuracy.

[0063] 2. Spectral Data Collection: Use a spectral module (spectrometer, handheld spectral analysis device, or hyperspectral camera 21) to measure reflected or transmitted light from plant leaves within a selected wavelength range. Ensure that sampling points are evenly distributed across the leaves to obtain more accurate data.

[0064] 3. Data processing: Convert the raw spectral data into reflectance values. Calculate the reflectance ratio or difference at a specific wavelength.

[0065] 4. Model building: Obtain the actual nitrogen and chlorophyll content of the leaves through laboratory chemical analysis as a reference standard. Use statistical methods (such as linear regression and multiple regression analysis) to establish a relationship model between the spectral parameters and the chemical measurement values.

[0066] 5. Model Validation: The established model is validated using independent sample sets to ensure its predictive accuracy and reliability. Error sources are analyzed and model performance is continuously optimized. Once a reliable model is established, spectral measurements can be used to rapidly estimate nitrogen and chlorophyll content in field crops, providing technical support for precision agriculture. This spectral-based method offers the advantages of high efficiency, speed, and non-destructiveness, making it particularly suitable for monitoring and managing large farmland areas.

[0067] In some embodiments, as Figure 3 As shown, the fixing structure 50 is disposed at the front end of the housing 10; and / or, the fixing structure 50 is disposed at the side of the housing 10. In other embodiments, the fixing structure 50 is any one of a collar clip, Velcro, and hook. In this way, the fixing structure 50 enables the entire device to be detachably fixed, making it convenient to carry around or secure in the field.

[0068] In practice, the entire device has a length of 40mm to 80mm, a width of 40mm to 80mm, and a height of 80mm to 140mm. In a preferred embodiment, the length and width of the device are 60mm, and the height is 120mm. Overall, the device is compact and portable, making it easier to operate than larger spectroscopic equipment and highly adaptable to complex scenarios.

[0069] In some embodiments, as Figure 1As shown, the positioning module 40 includes a visible light camera located at the front of the housing 10 and below the spectral module. This allows the visible light camera to capture the target object to determine the imaging area, facilitating the spectral module to accurately obtain spectral data of the target object. Because the spectral data is located above the visible light camera, the spectral module can acquire spectral data in real time as soon as the visible light camera captures the target object, significantly saving time and effort.

[0070] In some embodiments, as Figure 1 and Figure 2 As shown, the spectral module includes a hyperspectral camera 21 , and the camera of the hyperspectral camera 21 is located at the front end of the housing 10 ;

[0071] The positioning module 40 includes a visible light camera, and the camera of the visible light camera is located at the front end of the housing 10. The camera of the visible light camera is spaced apart from the camera of the hyperspectral camera 21 and arranged in the same direction. In this way, the camera of the hyperspectral camera 21 and the camera of the visible light camera are set on the same line. This is to ensure that the imaging areas of the two cameras are the same, thereby achieving the purpose of quickly locating the target object to be measured. Preferably, the camera of the visible light camera and the camera of the hyperspectral camera 21 are arranged in the horizontal direction, or in the vertical direction. In other embodiments, the camera of the hyperspectral camera 21 and the camera of the visible light camera can also be located at different positions of the housing 10, specifically, they can be located at the front end, rear end or side of the housing 10 respectively, or they can be located at the front end, rear end or side of the housing 10 at the same time.

[0072] In some embodiments, as Figure 2 As shown, the spectral module also includes a photosensitive element 22 and a spectroscopic film. The spectroscopic film is coated on the side of the photosensitive element 22 closest to the camera head of the hyperspectral camera 21. The spectroscopic film is used to separate the light of the desired wavelength band that enters the photosensitive element 22. The photosensitive element 22 is responsible for converting the received light signal into an electrical signal, thereby forming an image. The spectroscopic film can separate the incident light according to different wavelengths, so that only light of a specific wavelength band reaches the photosensitive element 22. This is very important for improving spectral resolution and reducing background noise.

[0073] In practice, the spectroscopic film, a composite silicon oxide material, separates the nine characteristic channels of natural light within the 400-800nm ​​wavelength range. This facilitates the spectral module to acquire single-band spectra and, based on this, calculate and invert adjacent spectra. This allows for rapid acquisition and measurement of hyperspectral data for chlorophyll and nitrogen with high accuracy.

[0074] In some embodiments, the imaging distance of the hyperspectral camera 21 is 2 to 5 meters. This distance range is suitable for plant monitoring tasks on the ground or low-altitude UAV platforms. It not only ensures sufficient spatial resolution, but also avoids the problem of insufficient depth of field caused by too close a distance. The required band is 400 to 800 nanometers, visible light region: 400 to 700 nanometers. This part includes key bands such as blue light (430 to 460 nanometers) and red light (650 to 680 nanometers) where the reflectance changes of plants are most significant, which is crucial for detecting chlorophyll content. Near-infrared region: 700 to 800 nanometers. The reflectance changes in this area can reflect the information of plant cell structure, which helps to assess the water status and biomass of plants.

[0075] In some embodiments, the device further comprises: a circuit board 60, a data transmission module 70, and a power supply module 80;

[0076] The circuit board 60 is installed in the installation space, and the circuit board 60 is electrically connected to the spectrum module and the positioning module 40;

[0077] The data transmission module 70 is installed in the installation space. The data transmission module 70 is communicatively connected or electrically connected to the spectral module and the positioning module 40 respectively. The data transmission module 70 is used to transmit the spectral data obtained by the spectral module and the position and distance information of the target object to be measured obtained by the positioning module 40 to the processing terminal;

[0078] The power supply module 80 is installed in the installation space, and the power supply module 80 is used to supply power to the device.

[0079] In application, the power supply module 80 provides a stable power supply for the entire device. A reliable power supply is essential to ensure the normal operation of all electronic components, especially for outdoor operations. The data transmission module 70 is responsible for sending the collected data to a remote server or user terminal. It supports real-time monitoring and remote access to facilitate data analysis and result feedback. Data transmission can be wired (such as through a USB interface) or wireless (such as through Wi-Fi, Bluetooth, 4G / 5G, etc.). The circuit board 60 serves as a physical carrier to connect and support all electronic components. The circuit board 60 not only provides electrical connections, but also plays a role in heat dissipation and protection. It is the basic architecture of the entire system.

[0080] In use, the device also includes an antenna 71, which is located at the top of the housing 10. This enhances the ability to receive and transmit wireless communication signals. This improves the distance and stability of data transmission, especially in outdoor environments. A good design of the antenna 71 is particularly important for ensuring communication quality.

[0081] In some embodiments, the device further includes an interface expansion module located on the side of the housing 10. The interface expansion module includes at least one of a USB port, a Type-C port, a VGA port, an HDMI port, and an SD / MMC card slot. This provides standard physical connection ports for data exchange and device charging. This allows users to directly export data to a computer, charge the device, or perform data transfer via these interfaces, increasing flexibility and convenience.

[0082] In some embodiments, as Figure 4 As shown, the device further includes a remote control module 90, which is in communication with the control module 30 and is used to remotely control the control module 30 to operate; the remote control module 90 includes a display screen 91 and a camera button 92;

[0083] The display screen 91 is used to display the position and distance information of the target object to be measured obtained by the positioning module 40;

[0084] The camera button 92 is provided below the display screen 91 , and the camera button 92 is used to control the positioning module 40 and the spectral module to take a photo.

[0085] In application, the remote control module 90 is connected to the control module 30 via wireless communication to achieve remote control of the entire system. This allows users to operate the device while being away from the device, improving work efficiency and operational safety. Among them, the display screen 91 displays various information, including but not limited to the target location and distance information obtained by the positioning module 40. Displays the geographical location of the target to help users accurately locate the object to be monitored. Displays the distance between the device and the target to ensure that the imaging distance is within the optimal range (2 to 5 meters). It can also display battery power, system status, shooting parameters, etc., to facilitate users to understand the working status of the device. The camera button 92 triggers the camera operation. Control the positioning module 40: When the camera button 92 is pressed, the positioning module 40 will record the current position and distance information to ensure the accuracy of the shooting parameters. Control the spectral module: Trigger the hyperspectral camera 21 and the visible light camera for synchronous shooting to obtain hyperspectral images and visible light images of the target.

[0086] The workflow of the portable device for rapid measurement of plant nitrogen and chlorophyll provided in the embodiments of the present application is as follows:

[0087] Start device: the user turns on the remote control module 90 and the main device, and ensures that a stable communication connection is established between the two. Position target: use the positioning module 40 to determine the position and distance of the target object, and display these information in real time on the display screen 91. Adjust position: according to the displayed positioning information, the user can adjust the position of the device to ensure that the target object is within the optimal imaging range. Take a photo: when the position of the target object is appropriate, the user presses the shutter key 92, and the remote control module 90 sends a shooting instruction to the control module 30. Data collection: after receiving the instruction, the control module 30 controls the hyperspectral camera 21 and the visible light camera to synchronously shoot the image of the target object. Data transmission: after shooting is completed, the data transmission module 70 sends the image data to the terminal device of the user or the cloud server for subsequent analysis.

[0088] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0089] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the embodiments of the present application.

Claims

1. A portable device for rapid measurement of plant nitrogen and chlorophyll, characterized in that: The device comprises: a housing, wherein the housing encloses an installation space; A spectral module is installed in the installation space, and the spectral module is partially provided through the front end of the housing, and the spectral module is used to obtain spectral data of the target object to be measured; a control module installed in the installation space, the control module being configured to calculate the chlorophyll content and the nitrogen content of the target object based on the spectral data; a positioning module, installed in the installation space, and partially passing through the front end of the housing, the positioning module being used to obtain position and distance information of a target object to be measured; and a fixing structure, provided on the housing, for detachably fixing the device on an external carrier; The fixing structure is any one of a collar clip, a Velcro, and a hook.

2. The portable device for rapid measurement of plant nitrogen and chlorophyll according to claim 1, characterized in that: The positioning module includes a visible light camera, and the camera head of the visible light camera is located at the front end of the housing and below the spectrum module.

3. The portable device for rapid measurement of plant nitrogen and chlorophyll according to claim 1, wherein: The spectral module includes a hyperspectral camera, and the camera of the hyperspectral camera is located at the front end of the housing; The positioning module includes a visible light camera, the camera head of the visible light camera is located at the front end of the housing, and the camera head of the visible light camera and the camera head of the hyperspectral camera are spaced apart and arranged in the same direction.

4. The portable device for rapid measurement of plant nitrogen and chlorophyll according to claim 3, wherein: The spectrum module further includes a photosensitive element and a spectroscopic film. The spectroscopic film is coated on a side of the photosensitive element close to the camera head of the hyperspectral camera. The spectroscopic film is used to separate light of a required wavelength band into the photosensitive element.

5. The portable device for rapid measurement of plant nitrogen and chlorophyll according to claim 4, characterized in that: The imaging distance of the hyperspectral camera is 2 to 5 meters; And / or, the required wavelength range is 400-800 nm.

6. The portable device for rapid measurement of plant nitrogen and chlorophyll according to claim 1, wherein: The device further comprises: a circuit board, installed in the installation space, the circuit board being electrically connected to the spectrum module and the positioning module; a data transmission module, installed in the installation space, the data transmission module being communicatively connected or electrically connected to the spectral module and the positioning module, respectively, and configured to transmit the spectral data acquired by the spectral module and the position and distance information of the target object to be measured acquired by the positioning module to a processing terminal; and A power supply module is installed in the installation space, and the power supply module is used to supply power to the device.

7. The portable device for rapid measurement of plant nitrogen and chlorophyll according to claim 6, characterized in that: The device also includes an interface expansion module arranged on the side of the shell, and the interface expansion module includes at least one of a USB interface, a Type-C interface, a VGA interface, an HDMI interface, and an SD / MMC card slot.

8. The portable device for rapid measurement of plant nitrogen and chlorophyll according to claim 1, wherein: The device further includes a remote control module, which is in communication with the control module and is used to remotely control the control module to operate; the remote control module includes: A display screen is used to display the position and distance information of the target object to be measured obtained by the positioning module; A camera button is provided below the display screen, and is used to control the positioning module and the spectral module to take photos.

9. The portable device for rapid measurement of plant nitrogen and chlorophyll according to claim 1, wherein: The fixing structure is provided at the front end of the housing; And / or, the fixing structure is arranged on a side of the shell.

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