An unmanned aerial vehicle payload bay apparatus and method of operation

Abstract

The application discloses a kind of unmanned aerial vehicle load cabin equipment and operating method, belong to the technical field of navigation positioning technology, reference receiver and lithium battery are installed in the inside of carrying box;Wireless transmission antenna, reference receiver antenna are provided on carrying box;Wireless transmission module output end is connected with wireless transmission antenna;Reference receiver is connected with reference receiver antenna;Data recorder is connected with reference receiver and wireless transmission module respectively, and wireless transmission module is connected with wireless transmission antenna;Supporting rod is provided at the front end of carrying box, and the front end of supporting rod is connected with measured tool installation shell, and measured receiver is installed in measured tool installation shell, and measured receiver is connected with measured antenna.The application can save and return test data in real time, have high-precision reference trajectory, adapt to a variety of size measured equipment and data transmission mode is flexible, meet the efficient, accurate test demand of positioning receiver and other products under high-altitude, high dynamic work environment.

Description

Technical Field

[0001] This invention belongs to the field of satellite navigation / regional navigation and positioning technology, specifically a UAV payload bay device. Background Technology

[0002] In high-altitude, high-dynamic working environments, the research and development verification of products such as positioning receivers typically requires mounting them on drones for testing. Currently, multi-rotor drones are commonly used as the transport vehicle, but existing technologies suffer from the following main problems: 1. Inability to save and transmit test data in real time: Existing UAV payload bay equipment can only store test data locally during flight and cannot transmit it to the ground station in real time. This prevents ground personnel from understanding the equipment's operating status in a timely manner and from making real-time adjustments and optimizations during flight, affecting the efficiency and effectiveness of testing. For example, in scenarios requiring real-time adjustment of test parameters, because the data cannot be transmitted back in real time, operators can only analyze the stored data after the flight, missing the optimal adjustment opportunity and increasing testing costs and time.

[0003] 2. Lack of high-precision reference trajectories for comparison: Accurately evaluating the performance of the positioning receiver under test requires high-precision reference trajectories for comparison. However, existing UAV payload bay equipment often fails to provide reference trajectories with centimeter-level accuracy, making the evaluation of the positioning accuracy of the receiver under test inaccurate and unreliable. This significantly limits the in-depth exploration and optimization of the receiver's performance, making it difficult to meet the requirements of high-precision positioning product testing.

[0004] 3. Limited Installation and Fixing Methods for Devices Under Test (DUTs): Current UAV payload bay equipment typically only accommodates DUTs of specific sizes, failing to meet the needs for rapid installation and fixation of DUTs of various sizes. This necessitates large-scale modifications or redesigns of the payload bay when testing different models or specifications of equipment, increasing testing costs and workload, and reducing testing flexibility and versatility.

[0005] 4. Limited Data Transmission Methods: Existing equipment uses relatively fixed data transmission methods, making it impossible to flexibly choose between real-time transmission or recorded storage based on testing needs. In some special scenarios, such as when detailed analysis of large amounts of data is required later, local storage is the only option, failing to fully utilize the advantages of real-time transmission. Conversely, in scenarios requiring real-time monitoring of device status, local data storage is not feasible, thus failing to meet diverse testing requirements. Summary of the Invention

[0006] To address the above issues, this invention provides a drone payload bay device that can save and transmit test data in real time, has a high-precision reference trajectory, is compatible with various sizes of devices under test, and offers flexible data transmission methods. It can meet the efficient and accurate testing needs of products such as positioning receivers in high-altitude and high-dynamic working environments.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a UAV payload bay device, comprising: a payload box, which houses a data logger, a wireless transmission module, a reference receiver, and a lithium battery; a wireless transmission antenna is provided at the front end of the payload box, and a reference receiver antenna is provided at the rear end; the output end of the wireless transmission module is connected to the wireless transmission antenna; the reference receiver is connected to the reference receiver antenna; a control switch and a plug are installed on the side of the payload box; the data logger is connected to both the reference receiver and the wireless transmission module, and is used to record receiver data and transmit data to the wireless transmission module; the wireless transmission module is connected to the wireless transmission antenna, and is used to transmit data to the ground in real time; a support rod is provided at the front end of the payload box, and an antenna mounting base is connected to the front end of the support rod; the antenna mounting base is connected to a cylindrical test fixture mounting shell, and a test receiver is installed inside the test fixture mounting shell; the test receiver is connected to the test antenna.

[0008] The beneficial effects of the above technical solution are as follows: This solution integrates key components such as a data logger, wireless transmission module, and reference receiver to achieve real-time acquisition, recording, and transmission of data from the device under test (DUT). The data logger synchronously records data from both the reference receiver and the DUT, while the wireless transmission module transmits the data back to the ground in real time, allowing ground personnel to monitor the flight status. Simultaneously, the reference receiver provides a high-precision reference trajectory, which, when compared and analyzed with the DUT's data, effectively assesses the DUT's positioning accuracy. Furthermore, the design of the DUT mounting housing allows for the rapid installation and fixation of DUTs of different sizes, improving the equipment's versatility and adaptability. Compared to existing technologies, this invention solves problems such as the inability to save and transmit test data in real time, the lack of high-precision reference trajectories for comparison, the limited installation and fixation methods for DUTs, and the single data transmission method. It offers advantages such as strong versatility, flexible data processing, lightweight design, and integration, effectively improving the performance and practicality of UAV payload bay equipment.

[0009] As a further improvement to the above solution, a lifting ring is provided on the mounting box.

[0010] The beneficial effects of the above technical solution are as follows: the setting of the lifting ring facilitates the suspension and fixation of the UAV payload bay equipment, making the installation of the equipment on the UAV more convenient and faster, improving the stability and reliability of the equipment, and also facilitating the rapid disassembly and transportation of the equipment.

[0011] As a further improvement to the above solution, the storage capacity of the data logger can be expanded to meet the storage needs of long-term test data.

[0012] The beneficial effects of the above technical solution are as follows: the expandable storage capacity enables the data logger to adapt to test tasks of different lengths, ensuring the complete recording of long-term flight test data, providing sufficient data support for subsequent data analysis and processing, and improving the applicability and flexibility of the equipment.

[0013] As a further improvement to the above solution, the wireless transmission module adopts a multi-band transmission method, selecting the optimal transmission frequency band according to different environments.

[0014] The beneficial effects of the above technical solution are as follows: the multi-band transmission method can automatically select the optimal transmission frequency band according to different test environments, effectively avoid signal interference, improve the stability and reliability of data transmission, and ensure real-time and accurate data transmission.

[0015] As a further improvement to the above solution, a shock-absorbing device is installed below the lithium battery; the shock-absorbing device is a foam pad; it can effectively reduce the impact of the vibration generated by the drone during flight on the equipment inside the payload box.

[0016] The beneficial effects of the above technical solution are as follows: the shock absorption device can effectively buffer the vibration generated during flight, protect the precision equipment inside the payload box from vibration damage, improve the service life of the equipment and the accuracy of data acquisition, and enhance the stability and reliability of the equipment in complex flight environments.

[0017] As a further improvement to the above solution, the mounting box is made of lightweight, high-strength alloy material.

[0018] The beneficial effects of the above technical solution are as follows: the use of lightweight high-strength alloy materials, while ensuring that the payload box has sufficient strength and rigidity, significantly reduces the weight of the equipment, reduces the requirements for the payload capacity of the UAV, improves the flight performance and endurance of the UAV, and also enhances the corrosion resistance and service life of the payload box.

[0019] As a further improvement to the above solution, the control switch includes: a rocker switch and a multi-channel signal switching switch. The rocker switch has five channels: one channel powers the mounting box and the product under test; the second and third channels power the wireless transmission module; and the fourth and fifth channels power the data logger. The multi-channel signal switching switch controls the data transmission method, allowing selection of whether data is retained in the data logging box, whether data is transmitted wirelessly, or whether data is directly read through a data connector. The multi-channel signal switching switch has multiple switching modes and can flexibly set the transmission priority of different signals to meet the needs of different testing scenarios.

[0020] The beneficial effects of the above technical solution are as follows: the combined design of the rocker switch and the multi-signal switching switch makes the power control and data transmission control of the equipment more flexible and convenient. The rocker switch can easily realize independent power-on control of different components, while the multi-signal switching switch can flexibly select the data transmission mode and priority according to different test scenarios, improving the adaptability and ease of operation of the equipment and meeting diverse test needs.

[0021] As a further improvement to the above scheme, the reference receiver is positioned below the lithium battery, between the shock-absorbing devices.

[0022] The beneficial effects of the above technical solution are as follows: placing the reference receiver below the lithium battery and between the shock absorption devices not only makes reasonable use of space, but also allows the reference receiver to be better protected by the shock absorption devices, reducing the impact of vibration on its working stability during flight, improving the accuracy and reliability of the reference receiver's data acquisition, and further enhancing the overall performance of the equipment.

[0023] As a further improvement to the above solution, the operation method of the UAV payload bay equipment includes the following steps: Step 1: Install the product under test (antenna under test + receiver under test) into the mounting housing of the fixture under test; Step 2: Set the parameters of the product under test according to the test scenario, and set the data transmission path to wireless transmission, data logger storage, or a combination of both; Step 3: The drone, carrying the drone payload bay equipment, takes off and flies according to the test scenario's flight trajectory; Step 4: Based on the selected data transmission path, view the corresponding data and set the parameters: When the data transmission path is selected as wireless transmission, the test product data can be received and viewed in real time through the wireless transmission module. At the same time, the test device parameters can be remotely set through the wireless transmission module according to the actual test conditions, so as to modify the test conditions in real time and improve the test efficiency. When the data transmission path is selected as data logger storage, the stored data can be read and analyzed through the external output interface of the data logger after the test is completed. When the data transmission path is a combination of both, some key data can be viewed in real time during flight via the wireless transmission module, while the data recorder stores all data completely for detailed analysis and retrospection when needed. Step 5: Complete the testing task and dismantle the equipment.

[0024] The beneficial effects of the above technical solution are: it has strong operability and flexibility. By rationally selecting the data transmission path, it can meet the data acquisition and analysis needs under different testing scenarios. The combination of real-time data transmission and subsequent data storage and analysis ensures both the efficiency of the test and provides comprehensive data support for subsequent in-depth research. Simultaneously, it allows for real-time remote setting of the parameters of the device under test during flight, improving the adaptability and efficiency of the test and ensuring the successful completion of the test mission.

[0025] Compared with the prior art, the present invention has the following advantages: By integrating multiple functional modules and optimizing structural design, the UAV payload bay equipment achieves versatility, flexibility, and efficiency. It solves problems in existing technologies such as the inability to save and transmit test data in real time, the lack of high-precision reference trajectories for comparison, the limited installation and fixing methods for the device under test, and the single data transmission method. This effectively improves the performance and practicality of the UAV payload bay equipment, reduces the requirements for the UAV platform, and provides a more complete and reliable solution for the UAV testing field. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the UAV payload bay equipment; Figure 2 This is a schematic diagram of the external structure of the UAV payload bay equipment; Figure 3 This is a schematic diagram of the tooling structure to be tested; Figure 4 This is a schematic diagram of the internal structure of the drone's payload bay; Figure 5 This is a schematic diagram of the reference receiver installation location.

[0027] Figure 6 This is a schematic diagram of the circuit module connection structure of this device.

[0028] In the diagram: 1. Mounting box; 2. Cover plate; 4. Lifting ring; 5. Antenna mounting base; 6. Wireless transmission antenna; 7. Support rod fixing base; 8. Support rod; 9. Reference receiver; 10. Test fixture mounting shell; 11. Reference receiver antenna; 12. Rocker switch; 13. Multi-channel signal switching switch; 14. Plug; 16. Data logger; 17. Wireless transmission module; 18. Vibration damping device; 19. Lithium battery; 20. Antenna fixing base. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0030] I. Overview of Implementation Examples like Figures 1-6 As shown, this embodiment details the implementation process of a UAV payload bay device, covering all aspects including device assembly, parameter setting, flight testing, and data processing. It is primarily used for the research, verification, and testing of products such as positioning receivers in high-altitude, high-dynamic working environments. By integrating key components such as a data logger, wireless transmission module, and reference receiver, it solves problems in existing technologies such as the inability to save and transmit test data in real time, the lack of high-precision reference trajectories for comparison, the limited installation and fixing methods for the device under test, and the single data transmission method, thereby improving the performance and practicality of the UAV payload bay device.

[0031] II. Equipment Assembly (a) Installation of mounting box and internal components 1. Select a mounting box: Select a lightweight, high-strength alloy mounting box with dimensions of 600mm×400mm×300mm. Generally, aluminum alloy is used, which has good protective performance and low weight, ensuring the overall lightweight and robustness of the equipment. The upper end of the mounting box is equipped with a removable cover plate 2 by bolts.

[0032] 2. Internal Component Installation: Inside the mounting box 1, the data logger 16, wireless transmission module 17, reference receiver 9, and lithium battery 19 are installed sequentially. The data logger 16 is connected to the reference receiver 9 and wireless transmission module 17 via a dedicated data cable, ensuring a secure and reliable connection for stable data transmission and recording. The data logger 16 has expandable storage capacity, using SD cards as the expansion storage medium, supporting a maximum capacity expansion of 128GB to meet the storage needs of long-term test data.

[0033] (ii) Antenna installation 1. Installation of Wireless Transmission Antenna 6: An antenna mounting base 5 is provided at the front end of the mounting box 1. The wireless transmission antenna 6 is installed on the antenna mounting base 5 and connected to the output end of the wireless transmission module 17 via an RF coaxial cable (such as an RG-8X cable). Ensure that the cable length does not exceed 2m to reduce signal loss. The wireless transmission antenna 6 is an omnidirectional antenna with an operating frequency band covering 2.4GHz~2.5GHz and a gain of 5dBi. During installation, ensure that the antenna is vertically upward and free from obstructions that may affect signal transmission.

[0034] 2. Reference Receiver Antenna Installation: Install the reference receiver antenna 11 at the rear of the mounting box 1. Connect it to the reference receiver 9 using an RF coaxial cable (such as an RG-8X cable), with a cable length not exceeding 2m. The reference receiver antenna 11 is a high-precision positioning antenna, operating at 1.57542GHz (GPS L1 band) with a gain of 3dBi. During installation, ensure the antenna is placed horizontally and without obstructions affecting signal reception.

[0035] (III) Installation of control switches and plugs 1. Rocker switch installation: A rocker switch 12 is installed on the side of the mounting box 1. The rocker switch 12 has five outputs, which are connected to the power input terminals of the mounting box 1, the product under test, the wireless transmission module 17, and the data logger 16 via insulated wires (such as AWG22 wires). Each output has a rated current of 5A and a rated voltage of 12V to ensure a stable power supply for each component.

[0036] 2. Installation of Multi-Signal Switch: A multi-signal switch 13 is installed on the side of the mounting box 1. The multi-signal switch 13 is connected to the data logger 16 and the wireless transmission module 17 via a logic control circuit (such as a relay-based switching circuit) to achieve flexible control over the data transmission method. The switch has three operating modes: data logger storage mode, wireless transmission mode, and direct data insertion mode. Switching between different modes can be achieved by rotating the switch.

[0037] 3. Plug Installation: Plug 14 is installed on the side of the mounting box 1. Plug 14 is used to connect external data acquisition equipment or power supply. The plug adopts aviation plug, which has good waterproof and dustproof performance. The contact material of the plug is phosphor bronze with gold plating to ensure the reliability and stability of the connection.

[0038] (iv) Assembly of the mounting shell for the tooling to be tested 1. Connection between support rod and antenna mount: A support rod mount 7 is installed at the front end of the mounting box 1. A support rod 8 is fitted inside the support rod mount 7. The front end of the support rod 8 is connected to the antenna mount 20. The support rod 8 is made of carbon fiber, with a length of 500mm and a diameter of 20mm, possessing good strength and rigidity. The antenna mount 20 is made of aluminum alloy, possessing good mechanical properties and corrosion resistance.

[0039] 2. Install the Test Fixture Housing: Connect the cylindrical test fixture housing 10 to the antenna mount 20. The test fixture housing 10 is made of ABS plastic, which has good insulation and mechanical properties. The receiver under test is installed inside the test fixture housing 10 and connected to the antenna under test through a dedicated interface (such as an SMA interface) to ensure effective signal transmission. The test fixture housing 10 is designed to be replaceable to accommodate various sizes of test devices. The replacement method is as follows: loosen the fixing screws on the antenna mount 20, remove the test fixture housing 10, replace it with a housing that fits the size of the target test device, and then firmly connect it to the antenna mount 20 with the fixing screws.

[0040] (v) Installation of vibration damping devices and lifting rings 1. Shock Absorption Device Installation: A shock absorption device 18 is installed below the lithium battery 19. A 10mm thick foam pad is selected as the shock absorption material. The foam pad measures 200mm × 150mm × 10mm and is installed inside the mounting box 1 by adhesive bonding. The foam pad has a density of 50kg / m³, providing excellent shock absorption performance and effectively reducing the impact of vibrations generated by the UAV during flight on the internal equipment of the mounting box 1.

[0041] 2. Lifting Ring Installation: Lifting ring 4 is installed on the payload box 1. Lifting ring 4 is made of stainless steel and can support the overall weight of the UAV payload bay equipment (approximately 10kg). It is fixed to the designated position on the payload box 1 with M6 bolts. The installation position of lifting ring 4 should ensure the equipment is suspended and balanced on the UAV to avoid tilting or damage to the equipment due to improper suspension.

[0042] III. Parameter Settings (a) Data Logger Settings 1. Turn on the device: Turn on the data logger 16, enter its settings interface, and set the parameters through the operation screen or configuration software.

[0043] 2. Storage capacity expansion: Insert the SD card into the SD card slot of the data logger 16 and set the storage capacity to 128GB to meet the storage needs of long-term test data.

[0044] 3. Sampling frequency setting: According to the test requirements, the sampling frequency of the data logger 16 is set to 50Hz to ensure accurate recording of data changes of the receiver under test.

[0045] 4. Calibration Setup: The data logger 16 is calibrated using a calibration procedure to ensure its recording accuracy. The calibration process includes time synchronization calibration and data accuracy calibration. Time synchronization calibration uses GPS signals as the time reference, and data accuracy calibration is performed by comparing with known standard signal sources.

[0046] (ii) Wireless transmission module settings 1. Parameter Configuration: The wireless transmission module 17 is configured with parameters, employing a multi-band transmission method. Based on the wireless environment of the test area, a spectrum analyzer is used to determine the frequency band with less interference, and its operating frequency band is set to 2.4GHz~2.4835GHz. Simultaneously, the transmit power of the wireless transmission module 17 is set to 1W to ensure the stability and reliability of data transmission.

[0047] 2. Communication Connection Test: The signal strength of the wireless transmission module 17 is tested using a signal strength tester to ensure that its signal strength within the test area meets communication requirements. Test points should cover all corners of the test area to ensure that the wireless transmission module 17 can stably transmit data to the ground station during flight.

[0048] (iii) Reference receiver settings 1. Parameter Configuration: The reference receiver 9 is a high-precision positioning receiver, set to positioning mode, with a data update rate of 10Hz and a positioning accuracy requirement of sub-meter level (≤1m). By connecting to a satellite signal simulator, ensure that the reference receiver 9 can normally receive signals and output high-precision reference trajectory data.

[0049] 2. Installation and Calibration: Install the reference receiver 9 below the lithium battery 19, between the shock-absorbing devices 18, and securely mount it inside the mounting box 1 using a fixing bracket. After installation, calibrate the reference receiver 9. The calibration process includes satellite signal search and positioning accuracy testing to ensure that the reference receiver 9 can accurately receive satellite signals and output high-precision reference trajectory data.

[0050] (iv) Control switch settings 1. Rocker switch settings: According to the test plan and data processing requirements, operate the rocker switch 12 to power on each component. For example, turning the first channel of the rocker switch 12 to the "ON" position powers on the mounting box 1 and the product under test; turning the second and third channels to the "ON" position powers on the wireless transmission module 17; and turning the fourth and fifth channels to the "ON" position powers on the data logger 16.

[0051] 2. Multi-channel signal switching switch setting: Rotate the multi-channel signal switching switch 13 to the corresponding working mode according to the test requirements. For example, if you need to view data in real time and adjust parameters, set the switch to wireless transmission mode; if you need to perform detailed data analysis later, set it to data logger storage mode.

[0052] IV. Flight Test (a) Installation of the product under test 1. Install the receiver under test (DUT): Install the DUT inside the mounting housing 10 of the DUT, ensuring a secure and reliable installation to prevent loosening or damage during flight. The parameters of the DUT should be set according to the test requirements, including operating mode, frequency, gain, etc., and calibrated using professional testing instruments (such as a spectrum analyzer, signal source analyzer, etc.).

[0053] 2. Connect the antenna under test: Connect the antenna under test to the receiver under test via a dedicated interface (such as an SMA interface), ensuring a secure and reliable connection to guarantee effective signal reception. The antenna under test should be a high-gain antenna operating at 1.57542 GHz (GPS L1 band) with a gain of 5 dBi. During installation, ensure the antenna is placed horizontally and without obstructions that could affect signal reception.

[0054] (ii) Pre-flight inspection 1. Equipment Connection Check: Check whether the connection between the UAV payload bay equipment and the UAV is secure, including the suspension status of the lifting ring 4 and whether the power connection is normal. Ensure that the equipment will not become loose or damaged due to connection problems during flight.

[0055] 2. Communication connection check: Check whether the communication connection between the wireless transmission module 17 and the ground station is normal. Send test commands through the ground station software and observe whether the wireless transmission module 17 can receive and respond correctly to ensure that the data can be transmitted to the ground station in real time.

[0056] (III) Flight Operation 1. Takeoff and Flight Path: The UAV takes off according to the predetermined flight path, with a flight altitude of 100m and a flight speed of 10m / s. The flight path includes various flight modes such as straight flight, curved flight, and hovering flight to comprehensively test the performance of the receiver under test under different flight conditions.

[0057] 2. Data Acquisition and Transmission: During flight, the reference receiver 9 transmits high-precision reference trajectory data to the data logger 16 in real time. The receiver under test (DUT) simultaneously acquires data and transmits it to the data logger 16. The data logger 16 records both sets of data synchronously, while the wireless transmission module 17 transmits the data to the ground station in real time. The ground station monitors and displays the received data in real time using dedicated software. If any data anomalies are detected, the DUT parameters are remotely set via the wireless transmission module 17 to optimize the testing process.

[0058] V. Data Processing and Analysis (I) Data Comparison and Analysis 1. Data Import: Import the data of the trajectory to be measured and the reference trajectory into professional data analysis software (such as MATLAB, Python data analysis library, etc.), and calculate the three-dimensional position deviation using mathematical methods such as the least squares method. The formula is:

[0059] in, For reference receiver coordinates, The coordinates are those of the receiver to be tested.

[0060] 2. Positioning Accuracy Evaluation: Through statistical analysis, key indicators such as the positioning accuracy of the receiver under test are obtained to evaluate whether its performance meets the design requirements. For example, the calculated results of the three-dimensional position deviation in a certain test are shown in the table below: Table 1: Positioning accuracy test data

[0061] The data in the table shows that the three-dimensional position deviation of the receiver under test is between 0.07m and 0.15m, indicating that its positioning accuracy is high and can meet the needs of practical applications.

[0062] (II) Speed ​​accuracy test data 1. Data Acquisition: During flight, the reference receiver and the receiver under test synchronously acquire velocity data at a frequency of 10Hz for 10 minutes, collecting a total of 600 data points.

[0063] 2. Velocity Deviation Calculation: The velocity deviation is calculated by comparing the velocity data of the reference receiver and the receiver under test. The formula is as follows:

[0064] 3. Speed ​​Accuracy Evaluation: Based on the calculation results, evaluate the speed measurement accuracy of the receiver under test. For example, the speed accuracy test data in a certain test is shown in the table below: Table 2: Speed ​​Accuracy Test Data

[0065] As can be seen from the table, the speed deviation of the receiver under test is between 0.1 m / s and 0.2 m / s, indicating that its speed measurement accuracy is high and can accurately reflect the actual flight speed, meeting the speed accuracy requirements of most application scenarios.

[0066] (III) Data Mining and Charting 1. Data Mining: In-depth analysis of test data to understand the performance variation patterns of the receiver under test (RTD) under different flight conditions. For example, analyzing the changes in positioning and velocity accuracy of the RTD at different flight altitudes, speeds, and attitudes to identify its optimal operating range and potential problems.

[0067] 2. Charting: Based on the analysis results, charts such as positioning accuracy error distribution map, velocity accuracy error distribution map, and position deviation change curve over time are drawn to intuitively display the performance indicators of the receiver under test.

[0068] VI. Test Completion and Equipment Recovery (a) Landing and Recovery 1. Landing Operation: After completing the test mission, guide the drone to a smooth landing according to the predetermined flight plan and operating procedures. During the landing process, closely monitor the drone's flight status and equipment operation to ensure a safe landing. Operators should clear the landing area before landing, ensuring it is free of debris and obstacles to provide a safe landing environment for the drone.

[0069] 2. Equipment Recovery: After the drone lands, immediately conduct a comprehensive inspection of the drone's payload bay equipment, including visual inspection, component connection inspection, and power supply inspection, to ensure the equipment is intact. Inspection items include: checking for scratches, deformation, or other damage on the equipment surface; verifying the firmness and reliability of all component connections; and confirming the power supply is normal. If any damage or abnormalities are found, repair and handling should be carried out promptly.

[0070] (ii) Data backup and equipment maintenance 1. Data Backup: Back up the data recorded by the data logger to an external storage device (such as a portable hard drive, optical disc, etc.) to ensure data security and integrity. During the backup process, data backup standards should be followed, and information such as the data collection time, collection location, and collection device should be noted to facilitate subsequent data retrieval and analysis.

[0071] 2. Equipment Maintenance: Clean and maintain the UAV payload bay equipment, including removing dust and dirt from the equipment surface; inspect the wear and tear of each component and replace worn parts promptly; calibrate and adjust the equipment to ensure it is in good working order. During maintenance, strictly follow the equipment maintenance manual to ensure the normal operation and lifespan of the equipment.

[0072] It should be noted that, in this document, the terms "comprising," "including," and any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or variations without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the concept and technical solution of the present invention to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A payload bay device for unmanned aerial vehicles (UAVs), characterized in that, include: The mounting box (1) contains a data logger (16), a wireless transmission module (17), a reference receiver (9), and a lithium battery (19). The front end of the mounting box (1) is provided with a wireless transmission antenna (6), and the rear end is provided with a reference receiver antenna (11). The output of the wireless transmission module (17) is connected to the wireless transmission antenna (6); The reference receiver (9) is connected to the reference receiver antenna (11); The mounting box (1) is equipped with a control switch and a plug (14) on its side. The data logger (16) is connected to the reference receiver (9) and the wireless transmission module (17) respectively, and is used to record receiver data and transmit data to the wireless transmission module (17). The wireless transmission module (17) is connected to the wireless transmission antenna (6) and is used to transmit data to the ground in real time. The mounting box (1) is provided with a support rod (8) at the front end. The front end of the support rod (8) is connected to an antenna fixing seat (20). The antenna fixing seat (20) is connected to a cylindrical test fixture mounting shell (10). The test fixture mounting shell (10) is equipped with a test receiver and the test receiver is connected to the test antenna. The control switches include: a rocker switch (12) and a multi-channel signal switching switch (13), wherein: The rocker switch (12) has five channels: one channel powers the mounting box (1) and the product under test; the second and third channels power the wireless transmission module (17); and the fourth and fifth channels power the data logger (16). The multi-channel signal switching switch (13) is used to control the data transmission mode. It can select whether the data is stored in the data recording box, the data is transmitted through a wireless transmission device, or the data is read directly through a data adapter.

2. The UAV payload bay device according to claim 1, characterized in that, The mounting box (1) is provided with a lifting ring (4).

3. The UAV payload bay device according to claim 1, characterized in that, The storage capacity of the data logger (16) is expandable to meet the storage needs of long-term test data.

4. The UAV payload bay device according to claim 1, characterized in that, The wireless transmission module (17) adopts a multi-band transmission mode and selects the optimal transmission frequency band according to different environments.

5. The UAV payload bay device according to claim 1, characterized in that, A shock-absorbing device (18) is provided below the lithium battery (19); the shock-absorbing device (18) is a foam pad.

6. The UAV payload bay device according to claim 1, characterized in that, The mounting box (1) is made of lightweight, high-strength alloy material.

7. The UAV payload bay device according to claim 1, characterized in that, The reference receiver (9) is located below the lithium battery (19) and between the shock-absorbing devices (18).

8. The UAV payload bay device according to claim 1, characterized in that, The operation method of the UAV payload bay equipment includes the following steps: Step 1: Install the product under test, namely the antenna under test and the receiver under test, into the mounting housing (10) of the fixture under test; Step 2: Set the parameters of the product under test according to the test scenario, and set the data transmission path to wireless transmission, data logger (16) storage or a combination of both; Step 3: The drone, carrying the drone payload bay equipment, takes off and flies according to the test scenario's flight trajectory; Step 4: Based on the selected data transmission path, view the corresponding data and set the parameters: When the data transmission path is selected as wireless transmission, the test product data can be received and viewed in real time through the wireless transmission module (17). At the same time, the test component parameters can be remotely set through the wireless transmission module (17) according to the actual test situation, so as to modify the test conditions in real time and improve the test efficiency. When the data transmission path is selected as data logger (16) storage, the stored data can be read and analyzed through the external output interface of the data logger (16) after the test is completed; When the data transmission path is a combination of both, some key data can be viewed in real time through the wireless transmission module (17) during flight, while the data recorder (16) stores all data completely so that detailed analysis and retrospection can be performed when needed; Step 5: Complete the testing task and dismantle the equipment.

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