Vegetation index truthing system

Abstract

This application provides a vegetation index authenticity verification system, which includes: an upward-looking sensor module, a downward-looking sensor module, a data transmission module, and a data processing module. The upward-looking sensor module measures downlink solar radiation data and transmits the downlink radiation data to the data transmission module. The downward-looking sensor module measures uplink radiation data reflected by vegetation and transmits the uplink radiation data data to the data transmission module. The data transmission module transmits both the uplink and downlink radiation data to the data processing module. The data processing module calculates the vegetation index based on the uplink and downlink radiation data and verifies the satellite measurements using ground measurements. The vegetation index authenticity verification system provided in this application achieves automatic and continuous measurement of the vegetation index through the upward-looking and downward-looking sensor modules, verifies the authenticity of satellite measurements, and thus verifies the authenticity of the vegetation index and the satellite measurements.

Description

Technical Field

[0001] This application relates to the field of vegetation index measurement, and in particular to a vegetation index authenticity verification system. Background Technology

[0002] In remote sensing applications, vegetation indices have been widely used to qualitatively and quantitatively evaluate vegetation cover and its growth vigor. Because vegetation spectra exhibit a complex mixture of vegetation, soil brightness, environmental influences, shading, soil color, and moisture, and are affected by atmospheric spatial-temporal variations, there is no universally accepted value for vegetation indices, and studies often yield conflicting results. The index increases rapidly with increasing biomass. When vegetation cover is at medium to low levels, the index increases rapidly with increasing cover, but its growth slows down after reaching a certain cover level. Therefore, it is suitable for dynamic monitoring of early and mid-stage vegetation growth. Combining blue, red, and near-infrared channels can significantly eliminate the interference of atmospheric aerosols on vegetation indices, and the resulting vegetation index can greatly improve the accuracy of vegetation growth monitoring and crop yield estimation.

[0003] Currently, most commonly used vegetation index measurement systems are handheld systems, which are difficult to use for automatic and continuous measurement and verification of the authenticity of vegetation indices in the field. Summary of the Invention

[0004] This application provides a vegetation index authenticity verification system, which aims to solve the problem of difficulty in automatically and continuously measuring and verifying the authenticity of vegetation indices in the field.

[0005] This application provides a vegetation index authenticity verification system, which includes an upward-looking sensing module, a downward-looking sensing module, a data transmission module, and a data processing module.

[0006] The upper-view sensing module is connected to the data transmission module; the lower-view sensing module is connected to the data transmission module; and the data transmission module is connected to the display processing module.

[0007] The upward-looking sensor module is used to measure the solar down-going radiation data and transmit the down-going radiation data to the data transmission module;

[0008] The downward-looking sensing module is used to measure the uplink radiation data reflected by the vegetation and transmit the uplink radiation data data to the data transmission module.

[0009] The data transmission module is used to transmit the uplink radiation data and the downlink radiation data to the data processing module;

[0010] The data processing module is used to calculate the vegetation index based on the uplink radiation data and the downlink radiation data, and to verify the authenticity of the satellite measurements.

[0011] According to the vegetation index authenticity verification system provided in this application, the upward-looking sensing module includes a cosine receiver, a filter, a photodetector, and a data sampler.

[0012] According to the vegetation index authenticity verification system provided in this application, the cosine receiver is used to control the light receiving angle range of the upward-looking sensing module.

[0013] According to the vegetation index authenticity verification system provided in this application, the filter is used to filter light according to the center wavelength and bandwidth.

[0014] According to the vegetation index authenticity verification system provided in this application, the data sampler is used to receive the collection instruction sent by the data transmission module and determine the sampling parameters according to the collection instruction.

[0015] According to the vegetation index authenticity verification system provided in this application, the photodetector is used to convert light signals into electrical signals according to the acquisition parameters.

[0016] According to the vegetation index authenticity verification system provided in this application, the data processing module includes a display processing unit and a data storage unit;

[0017] The display processing unit is used to calculate the vegetation index based on the uplink radiation data and the downlink radiation data, and to verify the authenticity of the satellite measurement values.

[0018] The data storage unit is used to store the vegetation index, the satellite measurement values, and the authenticity verification results.

[0019] According to the vegetation index authenticity verification system provided in this application, the data transmission module is further configured to receive control instructions from the data processing module and determine the acquisition instructions of the upward-looking sensing module based on the control instructions.

[0020] The data transmission module is also used to send the acquisition command to the data sampler of the upward-looking sensor module.

[0021] According to the vegetation index authenticity verification system provided in this application, the vegetation index authenticity verification system further includes a power supply module; the power supply module is used to supply power to the data transmission module through a preset power supply method.

[0022] According to the vegetation index authenticity verification system provided in this application, the preset power supply method includes solar power supply and / or mains power supply.

[0023] The vegetation index authenticity verification system provided in this application can automatically and continuously measure the downlink solar radiation data and the uplink radiation data reflected by vegetation in the field through uplink and downlink sensor modules. This allows for the calculation of the vegetation index using the continuous uplink and downlink radiation data, thus achieving automatic and continuous measurement of the vegetation index in the field. Simultaneously, the authenticity of satellite measurements is verified using the vegetation index, thereby verifying the authenticity of the satellite measurements. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this application or the prior art, the accompanying drawings in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is one of the schematic diagrams of the vegetation index authenticity verification system provided in this application;

[0026] Figure 2 This is a schematic diagram of the data transmission module provided in this application;

[0027] Figure 3 This is a schematic diagram of the structure of the upward-facing sensing module provided in this application;

[0028] Figure 4 This is a field installation and layout diagram of the vegetation index authenticity verification system provided in this application;

[0029] Figure 5 This is the second schematic diagram of the vegetation index authenticity verification system provided in this application. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] The following is combined Figures 1 to 5 Describe the vegetation index authenticity verification system provided in this application. Figure 1 This is one of the schematic diagrams of the vegetation index authenticity verification system provided in this application; Figure 2 This is a schematic diagram of the data transmission module provided in this application; Figure 3 This is a schematic diagram of the structure of the upward-facing sensing module provided in this application; Figure 4 This is a field installation and layout diagram of the vegetation index authenticity verification system provided in this application; Figure 5 This is the second schematic diagram of the vegetation index authenticity verification system provided in this application.

[0035] This application provides an embodiment of a vegetation index authenticity verification system. It should be noted that although the logical order is shown in the flowchart, under certain data conditions, the steps shown or described may be performed in a different order than that shown here.

[0036] Reference Figure 1 , Figure 1 This is one of the schematic diagrams of the vegetation index authenticity verification system provided in this application. The vegetation index authenticity verification system provided in this application includes a top-view sensing module, a bottom-view sensing module, a data transmission module, and a data processing module;

[0037] The upper-view sensing module is connected to the data transmission module; the lower-view sensing module is connected to the data transmission module; and the data transmission module is connected to the display processing module.

[0038] The upward-looking sensor module is used to measure the solar down-going radiation data and transmit the down-going radiation data to the data transmission module;

[0039] The downward-looking sensing module is used to measure the uplink radiation data reflected by the vegetation and transmit the uplink radiation data data to the data transmission module.

[0040] The data transmission module is used to transmit the uplink radiation data and the downlink radiation data to the data processing module;

[0041] The data processing module is used to calculate the vegetation index based on the uplink radiation data and the downlink radiation data, and to verify the authenticity of the satellite measurements.

[0042] In this embodiment, the top-view sensing module is connected to the data transmission module; the bottom-view sensing module is connected to the data transmission module; and the data transmission module is connected to the display processing module. The data transmission module and the display processing module are connected via wired or wireless communication. Furthermore, when the data processing module needs to measure the vegetation index or / and verify its authenticity, it issues a control command and transmits the control command to the data transmission module, which is connected to the data transmission module via wired or wireless communication. Furthermore, the data processing module includes a display processing unit and a data storage unit. Therefore, the control command issued by the data processing module to the data transmission module is actually a joint control command issued by the display processing unit and the data storage unit, aiming to ensure that the final data in the display processing unit and the data storage unit are consistent.

[0043] Furthermore, after receiving the control command transmitted by the data processing module, the data transmission module determines the acquisition commands for the upward-looking sensor module and the downward-looking sensor module based on the control command. Further, the data transmission module transmits the acquisition commands from the upward-looking sensor module and the downward-looking sensor module to their respective data samplers.

[0044] Furthermore, referring to Figure 2 , Figure 2 This is a schematic diagram of the data transmission module provided in this application. The interfaces of sensor 1 and sensor 2 in the data transmission module are respectively connected to the upper-view sensing module and the lower-view sensing module. The temperature sensor in the data transmission module can detect the ambient temperature where the sensor is located. The GPS in the data transmission module is used to detect the GPS information of the location of the vegetation index authenticity verification system. Further, the data transmission module combines the data from sensor 1 and sensor 2, the temperature data, and the GPS data into a data packet. During data interaction, the data packet is transmitted to the data processing module via wired or wireless communication. When the transmission network is congested, the data is first stored in the memory of the data transmission module. When the transmission network is restored, the data stored in memory is transmitted to the data processing module via the transmission network.

[0045] This can be further understood as follows: after receiving the control command from the data processing module, the data transmission module generates an acquisition command according to the command parameters in the control command, and controls each upward-looking and downward-looking sensor to acquire signals through the acquisition command. Simultaneously, the data transmission module acquires the downward solar radiation data measured by the upward-looking sensor and the upward radiation data reflected by vegetation acquired by the downward-looking sensor. Furthermore, the data transmission module sends the upward and downward radiation data to the data processing module. It should be noted that the measurement content in the control command differs; therefore, depending on the measurement content, one data transmission module can control multiple upward-looking sensors and multiple downward-looking sensors.

[0046] Furthermore, the upward-looking sensor module can measure the downlink radiation data of the sun and transmit the downlink radiation data to the data transmission module. The downward-looking sensor module can measure the uplink radiation data reflected by vegetation and transmit the uplink radiation data data to the data transmission module.

[0047] Furthermore, referring to Figure 3 As shown, Figure 3 This is a structural schematic diagram of the upward-facing sensor module provided in this application. Of course, Figure 3Alternatively, it could be a structural schematic diagram of the downward-looking sensing module provided in this application. The upward-looking sensing module includes a cosine receiver, a filter, a photodetector, and a data sampler. Similarly, the downward-looking sensing module also includes a cosine receiver, a filter, a photodetector, and a data sampler, wherein the data sampler can be a sampler carrying a data acquisition circuit.

[0048] Furthermore, the cosine receiver determines the angle range of light received by the uplink and downlink sensing modules. In other words, the cosine receiver controls the angle at which light enters the uplink and downlink sensing modules. This can be understood as the cosine receiver in the uplink and downlink sensing modules controlling the light receiving angle range of the uplink and downlink sensing modules.

[0049] Furthermore, the filter determines the center wavelength and bandwidth of the transmitted light. In other words, the filter controls the center wavelength and bandwidth of the light entering the sensor. Depending on the application requirements, the center wavelength and bandwidth of the filter can be customized and changed. It can be understood that the filters in the uplink and downlink sensing modules can filter the light according to the center wavelength and bandwidth.

[0050] Furthermore, the data sampler receives acquisition commands sent by the data transmission module. This can be understood as the data samplers in the uplink and downlink sensing modules receiving acquisition commands from the data transmission module and determining the acquisition parameters based on these commands. Furthermore, the photodetector converts the optical signals in the uplink and downlink sensing modules into electrical signals. This can be understood as the photodetectors in the uplink and downlink sensing modules converting optical signals into electrical signals according to the acquisition parameters.

[0051] This can be further understood as follows: after receiving the control command from the data processing module, the data transmission module generates an acquisition command according to the command parameters in the control command and sends the acquisition command to the data samplers of the uplink and downlink sensing modules. Upon receiving the acquisition command from the data transmission module, the data sampler determines the acquisition parameters based on the acquisition command. Furthermore, the data sampler controls the cosine receiver to acquire light within the corresponding light reception angle range based on the acquisition parameters, and then controls the filter to filter the acquired light according to the center wavelength and bandwidth. The filtered light signal is then converted into an electrical signal to obtain the downlink solar radiation data and the uplink radiation data reflected by vegetation. Furthermore, depending on the measurement content, the uplink and downlink sensors can contain multiple sets of filters and photodetectors.

[0052] In this embodiment, the uplink and downlink sensing modules, which consist of a cosine receiver, a filter, a photodetector, and a data sampler, can accurately measure the downlink solar radiation data and the uplink radiation data reflected by vegetation, thereby improving the accuracy of vegetation index verification.

[0053] Furthermore, after receiving the uplink and downlink radiation data sent by the data transmission module, the display processing unit in the data processing module calculates the vegetation index based on the uplink and downlink radiation data, converts the vegetation index into ground measurement values, verifies the authenticity of the satellite measurement values, and obtains the authenticity verification results.

[0054] In one embodiment, reference is made to Figure 4 As shown, Figure 4 This is a field installation and deployment diagram of the vegetation index authenticity verification system provided in this application. The vegetation index authenticity verification system is installed and deployed in the field in an N*M pattern, as shown below. Figure 4 As shown in the distribution, the N*M pattern consists of the first row (vegetation index authenticity verification system) 11, 12, 13 to 1M; the second row (systems 21, 22, 23 to 2M); the third row (systems 31, 32, 33 to 3M); and the Nth row (systems N1, N2, N3 to NM). Since the market size of each top-view and bottom-view sensor is too small compared to a single satellite pixel, this embodiment employs multiple top-view and bottom-view sensors to cover the area of ​​a satellite pixel.

[0055] Furthermore, since vegetation index verification systems are generally installed on the ground in the field, the vegetation index calculated by the data processing module based on uplink and downlink radiation data can also be referred to as the ground measurement value. Further, the ground measurement value and the satellite measurement value are compared using a size conversion method; that is, the ground measurement value and the satellite measurement value are verified for authenticity through size conversion, thus obtaining the authenticity verification result.

[0056] Furthermore, the data storage unit in the data processing module stores the vegetation index, satellite measurements, and authenticity verification results.

[0057] This application embodiment uses the vegetation index calculated from the sun's downlink radiation data and the uplink radiation data reflected by vegetation to verify the authenticity of satellite measurements, thereby improving the accuracy of vegetation index authenticity verification.

[0058] Furthermore, the vegetation index authenticity verification system of this application embodiment also includes a power supply module, referring to... Figure 5 As shown, Figure 5This is the second schematic diagram of the vegetation index authenticity verification system provided in this application. The power supply module can power the data transmission module through a preset power supply method, which includes solar power supply and / or mains power supply. Further, it can be understood that the power supply module can power the data transmission module through solar power supply and / or mains power supply, thus ensuring that the vegetation index authenticity verification system can automatically and continuously measure the vegetation index around the clock, regardless of the environment.

[0059] The vegetation index authenticity verification system provided in this application can automatically and continuously measure the downlink solar radiation data and the uplink radiation data reflected by vegetation in the field through uplink and downlink sensor modules. This allows for the calculation of the vegetation index using the continuous uplink and downlink radiation data, thus achieving automatic and continuous measurement of the vegetation index in the field. Simultaneously, the vegetation index is converted into ground-based measurement values ​​to verify the authenticity of satellite measurement values, thereby achieving the authenticity verification of the satellite measurement values.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A vegetation index authenticity verification system, characterized in that, The vegetation index authenticity verification system includes an upper-view sensing module, a lower-view sensing module, a data transmission module, and a data processing module. The upward-looking sensing module is connected to the data transmission module; the downward-looking sensing module is connected to the data transmission module; and the data transmission module is connected to the data processing module. The upward-looking sensor module is used to measure the solar down-going radiation data and transmit the down-going radiation data to the data transmission module; The downward-looking sensing module is used to measure the uplink radiation data reflected by the vegetation and transmit the uplink radiation data to the data transmission module. The data transmission module is used to transmit the uplink radiation data and the downlink radiation data to the data processing module; The data processing module is used to calculate the vegetation index based on the uplink radiation data and the downlink radiation data, and to verify the authenticity of the satellite measurements. The upward-looking sensing module includes a cosine receiver, a filter, a photodetector, and a data sampler; The cosine receiver is used to control the light receiving angle range of the upward-looking sensing module; The filter is used to filter light according to the center wavelength and bandwidth; The data sampler is used to receive the acquisition command sent by the data transmission module and determine the acquisition parameters according to the acquisition command; The photodetector is used to convert optical signals into electrical signals according to the acquisition parameters.

2. The vegetation index authenticity verification system according to claim 1, characterized in that, The data processing module includes a display processing unit and a data storage unit; The display processing unit is used to calculate the vegetation index based on the uplink radiation data and the downlink radiation data, and to verify the authenticity of the satellite measurement values. The data storage unit is used to store the vegetation index, the satellite measurement values, and the authenticity verification results.

3. The vegetation index authenticity verification system according to claim 1, characterized in that, The data transmission module is also used to receive control instructions from the data processing module and determine the acquisition instructions of the upward-looking sensing module according to the control instructions. The data transmission module is also used to send the acquisition command to the data sampler of the upward-looking sensor module.

4. The vegetation index authenticity verification system according to claim 1, characterized in that, The vegetation index authenticity verification system also includes a power supply module; the power supply module is used to supply power to the data transmission module through a preset power supply method.

5. The vegetation index authenticity verification system according to claim 4, characterized in that, The preset power supply methods include solar power supply and / or mains power supply.

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