IoT NTN satellite communication terminal product OTA test system and method based on temperature sensor real-time monitoring

Abstract

The invention relates to the technical field of satellite communication terminal product testing, in particular to an IoT NTN satellite communication terminal product OTA testing system and method based on real-time monitoring of a temperature sensor, and the system comprises a full anechoic chamber, a rotary table, a temperature monitoring module and a data collection and measurement module. The rotary table is arranged in the full anechoic chamber and is connected with the data acquisition and measurement module, a sample to be tested is placed on the rotary table, the temperature monitoring module is connected with the sample to be tested and the data acquisition and measurement module, the data acquisition and measurement module performs rotation control on the rotary table, and the temperature monitoring module is connected with the data acquisition and measurement module. And reading the test data of the tested sample. According to the invention, connection and emission tests with sample temperature monitoring can be realized, and the problems that the test period is long and the test result cannot reflect the actual performance of the sample due to the fact that the test result is inaccurate due to temperature rise in the test process and the sample needs to be tested again are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of satellite communication terminal product testing, and in particular to an OTA testing system and method for IoT NTN satellite communication terminal products based on real-time monitoring by a temperature sensor. Background Art

[0002] With the rapid development of satellite communications and satellite Internet terminals represented by smartphones, the stability of satellite communications or satellite Internet services on terminals has attracted more and more attention from terminal manufacturers and consumers. In order to achieve stable SMS, voice calls and broadband data services, the air interface radiation transmission and air interface radiation reception capabilities on the terminal side are particularly important when the satellite is far away, the signal is weak, and there is high latency and high Doppler frequency shift relative to the ground base station. This will determine the success rate and stability of terminal-satellite communication.

[0003] At present, the OTA performance test method of satellite terminals is not perfect. Some satellite terminals based on private satellite technology have OTA technical requirements and test methods, and existing cellular network terminals mainly follow YD / T 1484.1 "Measurement Methods for Space RF Radiated Power and Receiver Performance of Wireless Terminals Part 1: General Requirements". There is no unified test method for OTA test methods of satellite terminals based on IoT NTN.

[0004] Since IoT NTN satellite communication terminals are backward compatible with cellular transmission functions, the OTA test method for handheld terminals based on IoT NTN should be as consistent as possible with the OTA test solution for cellular terminals, and the measurement chamber should make use of existing solutions as much as possible. After analyzing the core differences between satellite communication terminals and cellular terminals, the main problems faced by the current OTA test solution for IoT NTN satellite communication terminal products are as follows:

[0005] 1. Compared with cellular network terminals, the antenna conditions of smart phone-type handheld satellite terminals using IoT NTN are different. The antenna pattern of satellite communication terminals will have strong directivity, while the antenna pattern of cellular network terminals is close to an omnidirectional antenna. Depending on the voice or data communication service, the directivity of the satellite antenna pattern may vary according to the usage requirements. The impact of air interface performance in different situations should be an influencing factor that should be considered in the OTA performance requirements of handheld satellite terminals. In order to reflect the antenna performance of IoT NTN satellite terminals, the radiated power and radiation receiving sensitivity should be within the antenna beam range. Therefore, the beam vertex of the satellite antenna of the terminal under test should be pre-aligned with the vertex of the darkroom antenna during the test. When testing different communication services on the same sample, it is also necessary to re-scan and align the terminal antenna beam vertex.

[0006] 2. During the test transmission project, the terminal transmits continuously in a short period. The spectrum analyzer is used to measure the transmission power according to the actual business cycle. The test time of 60 seconds is too short to fully sample the data. Non-business short-term continuous transmission is required.

[0007] The above problems will cause the test process to be longer than the traditional test time. During the process, the sample will remain in a continuous transmission state, causing abnormal heating that affects PA efficiency and device reliability. The test results are inconsistent with the performance in the actual scenario. It is necessary to monitor the real-time temperature of the sample during the test and stop the test in time when abnormal temperature rise is found. The existing OTA test scheme does not accurately and quantitatively monitor the real-time temperature of the sample. Often, during the test, the engineer realizes that the test data results are abnormal before confirming whether the sample is in a normal working state and then taking action, resulting in late discovery of sample abnormalities, thus wasting the site use time and lengthening the overall test cycle. In addition, the sample test requires someone to continuously observe the data results, which is not conducive to the laboratory to realize unattended automated testing. Therefore, the present invention proposes an OTA test system and method for IoT NTN satellite communication terminal products based on real-time monitoring of temperature sensors. Summary of the invention

[0008] The purpose of the present invention is to provide an OTA testing system and method for IoT NTN satellite communication terminal products based on real-time monitoring of temperature sensors, to realize connection and transmission tests with sample temperature monitoring, to solve the problem that the test results are inaccurate due to temperature rise during the test, resulting in the need to retest the samples, which leads to a long test cycle and the test results cannot reflect the actual performance of the samples.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] An IoT NTN satellite communication terminal product OTA test system based on real-time monitoring by a temperature sensor comprises: a full radio wave darkroom, a turntable, a temperature monitoring module and a data acquisition and measurement module, wherein the turntable is placed in the full radio wave darkroom and connected to the data acquisition and measurement module, a sample to be tested is placed on the turntable, the temperature monitoring module is respectively connected to the sample to be tested and the data acquisition and measurement module, and the data acquisition and measurement module controls the rotation of the turntable and reads the test data of the sample to be tested.

[0011] Optionally, the temperature monitoring module includes: a temperature sensor, a data acquisition card, and a shielding box, wherein the temperature sensor collects the surface temperature of the sample under test and is connected to the data acquisition card via a serial port line, the data acquisition card is placed in the shielding box, the data acquisition card is connected to the data acquisition and measurement module, and the shielding box is placed on the turntable.

[0012] Optionally, the data acquisition and measurement module includes: a main control computer, a base station simulator, a data receiving device, and an antenna, wherein the main control computer is connected to the base station simulator and the data receiving device, the base station simulator and the data receiving device are connected to the antenna, and the antenna is placed in the full radio wave darkroom.

[0013] Optionally, the antenna includes a communication antenna and a measurement antenna, and is connected to the antenna through the base station simulator and the data receiving device to configure test parameters, read the connection status of the sample under test, and collect test data of the sample under test.

[0014] To further achieve the above purpose, the present invention also provides an OTA testing method for IoTNTN satellite communication terminal products based on real-time monitoring of temperature sensors, comprising:

[0015] S1. Start the test system power supply and connect the test link. Use the base station simulator to configure the test signal frequency band. Connect the communication antenna of the full anechoic chamber to the sample under test and establish a loopback test mode.

[0016] S2, connecting the data receiving device to the measuring antenna of the full anechoic chamber, setting the frequency of the measuring channel, recording the initial temperature of the measured sample, and setting the warning temperature value;

[0017] S3, determining the service to be tested, and measuring the satellite antenna pattern of the sample to be tested under the service to be tested;

[0018] S4, setting the maximum antenna gain direction of the measured sample to point to the measurement antenna according to the satellite antenna pattern information, aligning the antenna beam vertex of the measured sample with the antenna vertex in the full anechoic chamber, and setting the alignment direction to the test system coordinate system direction;

[0019] S5, respectively connect the data receiving device to the θ polarization and Polarization connection, capturing the signal emitted by the sample under test, and obtaining the test result of the test point;

[0020] S6, configure the coordinates for the turntable, repeat S5, press The axis steps to complete the test of each test point, obtain the test results of each test point, and complete the business performance test of the tested sample.

[0021] Optionally, in S5, the data receiving device is connected to the θ polarization and Polarization connection, capturing the signal emitted by the sample under test, and obtaining the test result of the test point include:

[0022] Connecting the data receiving device to the θ polarization of the measuring antenna, capturing the signal emitted by the measured sample and uploading it to the main control computer for recording;

[0023] The data receiving device is connected to the measuring antenna Polarization connection, capturing the signal emitted by the sample under test and uploading it to the main control computer for recording;

[0024] The main control computer will polarize theta and The polarized data are synthesized in a linear value sum manner to generate the test results of the test points.

[0025] Optionally, the method also includes: during the test process of S4-S6, using a temperature monitoring module to monitor the temperature value of the sample under test in real time; when the temperature value exceeds the warning temperature value, a warning is issued, and the base station simulator is controlled to disconnect the communication connection and stop the test; when the temperature value returns to normal, the base station simulator is controlled to reconnect the communication and continue the test.

[0026] Optionally, the method further includes S7, switching to a new service to be tested, and repeating steps S3-S6 to complete the testing of all services to be tested.

[0027] The beneficial effects of the present invention are:

[0028] (1) The present invention introduces temperature monitoring to monitor the temperature changes of the tested sample in real time, thereby solving the problem in traditional testing that the temperature rise of the sample caused by continuous emission affects the efficiency of the power amplifier and the reliability of the device. During the test process, temperature has a direct impact on the performance of electronic components. Especially under the condition of long-term continuous operation, the temperature change will affect the stability of the device and the accuracy of the test results. Through real-time temperature monitoring, when the sample temperature exceeds the preset warning temperature value, the test will be automatically paused and the communication connection with the test sample will be disconnected, avoiding the decrease in PA efficiency and device damage caused by temperature rise, ensuring the consistency of the test conditions with the actual use conditions, and ensuring the authenticity and reliability of the test results.

[0029] (2) The present invention avoids test interruption and retesting due to sample temperature rise through real-time temperature monitoring and early warning mechanism, effectively shortening the test cycle. Real-time temperature monitoring can prevent the impact of temperature rise on the test in advance, reduce the waste of test site resources and time caused by testing when the sample is overheated, and thus improve test efficiency.

[0030] (3) The present invention realizes the automation of the test process, including automatic control of turntable rotation, automatic data collection, automatic temperature monitoring, etc., so that the test system can automatically complete the test and record the original data without the need for special personnel on duty after calibration and debugging. It can achieve precise control and efficient management of the test process, greatly reduce the need for manual intervention, improve the level of test automation, and help reduce test costs and improve test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of the structure of an OTA test system for IoT NTN satellite communication terminal products based on real-time monitoring by a temperature sensor according to an embodiment of the present invention, wherein: 1-tested sample, 2-temperature sensor, 3-data acquisition card, 4-shielding box, 5-turntable, 6-main control computer, 7-base station simulator, 8-spectrum analyzer or receiver, 9-amplifier, 10-RF switch, 11-communication antenna, 12-measurement antenna, and 13-full anechoic chamber. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] The present embodiment provides an OTA test system for IoT NTN satellite communication terminal products based on real-time monitoring by a temperature sensor, comprising: a full radio wave darkroom, a turntable, a temperature monitoring module and a data acquisition and measurement module, wherein the turntable is placed in the full radio wave darkroom and connected to the data acquisition and measurement module, a sample to be tested is placed on the turntable, the temperature monitoring module is respectively connected to the sample to be tested and the data acquisition and measurement module, and the data acquisition and measurement module controls the rotation of the turntable and reads the test data of the sample to be tested.

[0036] Among them, the temperature monitoring module includes: a temperature sensor, a data acquisition card, and a shielding box, wherein the temperature sensor collects the surface temperature of the sample under test and is connected to the data acquisition card through a serial port line, the data acquisition card is placed in the shielding box, the data acquisition card is connected to the main control computer, and the shielding box is placed on the turntable.

[0037] The data acquisition and measurement module includes: a main control computer, a base station simulator, a data receiving device, and an antenna, wherein the main control computer is connected to the base station simulator and the data receiving device, the base station simulator and the data receiving device are connected to the antenna, and the antenna is placed in the full radio wave darkroom.

[0038] The antenna includes a communication antenna and a measurement antenna, which are connected to the antenna through the base station simulator and the data receiving device to configure test parameters, read the connection status of the sample under test and collect test data of the sample under test.

[0039] Specifically, this embodiment introduces temperature monitoring to monitor the temperature changes of the tested sample in real time, thereby solving the problem in traditional testing that the temperature rise of the sample caused by continuous emission affects the efficiency of the power amplifier and the reliability of the device. During the test process, temperature has a direct impact on the performance of electronic components. Especially under the condition of long-term continuous operation, the temperature change will affect the stability of the device and the accuracy of the test results. Through real-time temperature monitoring, when the sample temperature exceeds the preset warning temperature value, the test will be automatically paused and the communication connection with the test sample will be disconnected, avoiding the decrease in PA efficiency and device damage caused by temperature rise, ensuring the consistency of the test conditions with the actual use conditions, and ensuring the authenticity and reliability of the test results.

[0040] This embodiment avoids test interruption and retesting due to sample temperature rise through real-time temperature monitoring and early warning mechanism, effectively shortening the test cycle. Real-time temperature monitoring can prevent the impact of temperature rise on the test in advance, reduce the waste of test site resources and time caused by testing under overheated sample state, and thus improve test efficiency.

[0041] This embodiment realizes the automation of the test process, including automatic control of turntable rotation, automatic data collection, automatic temperature monitoring, etc., so that the test system can automatically complete the test and record the original data without the need for special personnel on duty after calibration and debugging. It can achieve precise control and efficient management of the test process, greatly reduce the need for manual intervention, improve the level of test automation, and help reduce test costs and improve test efficiency.

[0042] Combine the following Figure 1The specific composition of an IoT NTN satellite communication terminal product OTA test system based on real-time monitoring by a temperature sensor proposed in this embodiment is provided, including: a full radio wave darkroom 13, a turntable 5, a temperature monitoring module and a data acquisition and measurement module, wherein the turntable 5 is placed in the full radio wave darkroom 13 and connected to the data acquisition and measurement module, a sample 1 to be tested is placed on the turntable 5, the temperature monitoring module is respectively connected to the sample 1 to be tested and the data acquisition and measurement module, and the data acquisition and measurement module controls the rotation of the turntable 5 and reads the test data of the sample 1 to be tested.

[0043] The temperature monitoring module includes a temperature sensor 2, a data acquisition card 3, and a shielding box 4, wherein the temperature sensor 2 contacts the surface of the sample 1 to be measured. In this embodiment, the temperature sensor 2 specifically places the probe on the sample surface according to the shape of the sample 1 to be measured, or uses a clamp to fix and contact the sample surface, and is connected to the data acquisition card 3 via a serial port line. The data acquisition card 3 is placed in the shielding box 4, the data acquisition card 3 is connected to the data acquisition and measurement module, and the shielding box 4 is placed on the turntable 5.

[0044] The data acquisition and measurement module includes a main control computer 6, a base station simulator 7, a data receiving device, and an antenna, wherein the main control computer 6 is connected to the base station simulator 7 and the data receiving device, the base station simulator 7 and the data receiving device are connected to the antenna, and the antenna is placed in a fully radio wave darkroom 13.

[0045] Specifically, in this embodiment, the data acquisition card 3 leads the line to the outside of the full anechoic chamber 13 through a soft plastic tube and is connected to the main control computer 6.

[0046] The turntable 5 is placed in a fully anechoic chamber 13 and is connected to a main control computer 6 via a line. The main control computer 6 contains test software that can control the rotation of the turntable 5 .

[0047] In this embodiment, the data receiving device adopts a spectrum analyzer or a receiver 8, and the antenna includes a communication antenna 11 and a measuring antenna 12. The main control computer 6 integrates data acquisition and measurement software. The base station simulator 7 and the spectrum analyzer or the receiver 8 are connected through a GPIB cable or a network cable to configure test parameters, read the connection status of the sample to be tested 1 and collect test data of the sample to be tested 1. The base station simulator 7, the spectrum analyzer or the receiver 8 and other devices are connected to the communication antenna 11 and the measuring antenna 12 through a test line. The communication antenna 11 and the measuring antenna 12 are placed in a full radio wave darkroom 13, and the communication disconnection and connection between the base station simulator 7 and the communication antenna 11 are controlled by the radio frequency switch 10.

[0048] The fully anechoic chamber 13 and its coordinate system, minimum measurement distance, system calibration configuration, etc. used in the test system of this embodiment adopt the requirements of YD / T 1484.1 "Measurement Methods for Spatial RF Radiated Power and Receiver Performance of Wireless Terminals Part 1: General Requirements" 4.1 to 4.3.

[0049] To further achieve the above purpose, this embodiment also provides an OTA testing method for IoTNTN satellite communication terminal products based on real-time monitoring by a temperature sensor, including:

[0050] S1. Start the test system power supply and connect the test link. Use the base station simulator to configure the test signal frequency band. Connect the communication antenna of the full anechoic chamber to the sample under test and establish a loopback test mode.

[0051] S2, connecting the data receiving device to the measuring antenna of the full anechoic chamber, setting the frequency of the measuring channel, recording the initial temperature of the measured sample, and setting the warning temperature value;

[0052] S3, determining the service to be tested, and measuring the satellite antenna pattern of the sample to be tested under the service to be tested;

[0053] S4, setting the maximum antenna gain direction of the measured sample to point to the measurement antenna according to the satellite antenna pattern information, aligning the antenna beam vertex of the measured sample with the antenna vertex in the full anechoic chamber, and setting the alignment direction to the test system coordinate system direction;

[0054] S5, respectively connect the data receiving device to the θ polarization and Polarization connection, capturing the signal emitted by the sample under test, and obtaining the test result of the test point;

[0055] S6, configure the coordinates for the turntable, repeat S5, press The axis steps to complete the test of each test point, obtain the test results of each test point, and complete the business performance test of the tested sample.

[0056] Further, in S5, the data receiving device is connected to the θ polarization and Polarization connection, capturing the signal emitted by the sample under test, and obtaining the test result of the test point include:

[0057] Connecting the data receiving device to the θ polarization of the measuring antenna, capturing the signal emitted by the measured sample and uploading it to the main control computer for recording;

[0058] The data receiving device is connected to the measuring antenna Polarization connection, capturing the signal emitted by the sample under test and uploading it to the main control computer for recording;

[0059] The main control computer will polarize theta and The polarized data are synthesized in a linear value sum manner to generate the test results of the test points.

[0060] Furthermore, the method also includes: during the test process of S4-S6, a temperature monitoring module is used to monitor the temperature value of the sample under test in real time. When the temperature value exceeds the warning temperature value, a warning is issued, and the base station simulator is controlled to disconnect the communication connection and stop the test. When the temperature value returns to normal, the base station simulator is controlled to reconnect the communication and continue the test.

[0061] Furthermore, the method further comprises S7, switching a new service to be tested, and repeating steps S3-S6 to complete the testing of all services to be tested.

[0062] Specifically, the specific process of the testing method provided in this embodiment is as follows, including:

[0063] Step 1: Start the test system power supply and connect the test link, use the data acquisition and measurement software in the main control computer 6 to confirm the instrument equipment address to complete the instrument configuration, establish a connection with the base station simulator 7 and the spectrum analyzer or receiver 8 through the GPIB line or network cable, create a new software test script to select the frequency band, bandwidth, modulation mode and other test parameters and save the test case, after the parameter setting is completed, click Start Test to execute the test case, the data acquisition and measurement software controls the base station simulator 7 to configure the set test signal frequency band, connects to the sample under test 1 through the communication antenna 11 of the full radio wave darkroom 13 and establishes a loopback test mode, and sets the radio frequency switch 10 to control the communication disconnection and connection between the base station simulator 7 and the communication antenna 11;

[0064] Step 2: The spectrum analyzer or receiver 8 is connected to the measurement antenna 12 of the full anechoic chamber 13, and the frequency of the measurement channel is set; the initial temperature of the sample 1 to be measured is recorded, and the warning temperature value is set in the data acquisition measurement software;

[0065] Step 3: Determine the service form performance of this single test, measure the satellite antenna pattern of the tested sample 1, and obtain the antenna pattern information;

[0066] Step 4: The maximum antenna gain direction of the measured sample 1 points to the measuring antenna 12, aligning the beam vertex of the measured terminal satellite antenna with the vertex of the darkroom antenna, and setting this direction as the measurement system coordinate system θ=0° direction;

[0067] Step 5: The spectrum analyzer or receiver 8 is connected to the θ polarization of the measuring antenna 12, and captures the signal emitted by the sample 1 under test; the data acquisition and measurement software in the main control computer 6 reads and records the data of the group of samples under test measured by the spectrum analyzer or receiver 8, and imports the CSV or EXCEL file recording the test limit data into the data acquisition and measurement software, and the data acquisition and measurement software automatically compares the measured data with the test limit data. If the measured data result is better than the limit, the test item passes, otherwise the test item fails the test, and the data acquisition and measurement software pops up a warning prompt and counts down for 60 seconds. After the countdown ends, the data acquisition and measurement software will continue to execute the next test item;

[0068] Step 6: Spectrum analyzer or receiver 8 and measurement antenna 12 Polarization connection, and capture the signal emitted by the sample under test 1; the data acquisition and measurement software in the main control computer 6 reads and records the data of the group of samples under test measured by the spectrum analyzer or receiver 8, and imports the CSV or EXCEL file recording the test limit data into the data acquisition and measurement software. The data acquisition and measurement software automatically compares the measured data with the test limit data. If the measured data result is better than the limit, the test item passes, otherwise the test item fails the test, and the data acquisition and measurement software pops up a warning prompt and counts down for 60 seconds. After the countdown ends, the data acquisition and measurement software will continue to execute the next test item; the data acquisition and measurement software automatically compares the θ polarization with the test limit data. The polarized data are synthesized into the test result of the test point in the form of linear value sum;

[0069] Step 7: Set the coordinates of turntable 5, repeat steps 5 and 6, and press The axis steps to complete the values ​​of each test point and obtains the final test result;

[0070] Step 8: During step 4 to step 7, the data acquisition and measurement software monitors the temperature of the sample 1 in real time through the temperature sensor 2 and displays it on the test interface. When the temperature of the sample 1 exceeds the set warning temperature value, the data acquisition and measurement software pops up a warning;

[0071] Step 9: When the abnormal temperature warning of the tested sample 1 pops up, the data acquisition and measurement software can automatically suspend the test and save the test report at the same time. The data acquisition and measurement software controls the base station simulator 7 to disconnect the communication connection. When the temperature of the tested sample 1 returns to normal, the test plan can be opened again to continue the test. The execution process of the data acquisition and measurement software is recorded in the data log of the software.

[0072] Step 10: After the single test of the sample 1 is completed, if it is necessary to test the performance of different business forms, the directivity of its satellite antenna pattern may change, and steps 3 and 4 should be repeated.

[0073] The embodiments described above are only descriptions of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An IoT NTN satellite communication terminal product OTA test system based on real-time monitoring of temperature sensors, characterized in that: include: A full radio darkroom, a turntable, a temperature monitoring module and a data acquisition and measurement module. The turntable is placed in the full radio darkroom and connected to the data acquisition and measurement module. The sample to be tested is placed on the turntable. The temperature monitoring module is respectively connected to the sample to be tested and the data acquisition and measurement module. The data acquisition and measurement module controls the rotation of the turntable and reads the test data of the sample to be tested.

2. The IoT NTN satellite communication terminal product OTA test system based on real-time monitoring of temperature sensors according to claim 1 is characterized in that: The temperature monitoring module includes: a temperature sensor, a data acquisition card, and a shielding box, wherein the temperature sensor collects the surface temperature of the sample under test and is connected to the data acquisition card via a serial port line, the data acquisition card is placed in the shielding box, the data acquisition card is connected to the data acquisition and measurement module, and the shielding box is placed on the turntable.

3. The IoT NTN satellite communication terminal product OTA test system based on real-time monitoring of temperature sensors according to claim 1 is characterized in that: The data acquisition and measurement module includes: a main control computer, a base station simulator, a data receiving device, and an antenna, wherein the main control computer is connected to the base station simulator and the data receiving device, the base station simulator and the data receiving device are connected to the antenna, and the antenna is placed in the full radio wave darkroom.

4. The IoT NTN satellite communication terminal product OTA test system based on real-time monitoring of temperature sensors according to claim 3 is characterized in that: The antenna includes a communication antenna and a measurement antenna, which are connected to the antenna through the base station simulator and the data receiving device to configure test parameters, read the connection status of the sample under test and collect test data of the sample under test.

5. An OTA testing method for IoT NTN satellite communication terminal products based on real-time monitoring of temperature sensors, characterized in that: include: S1. Start the test system power supply and connect the test link. Use the base station simulator to configure the test signal frequency band. Connect the communication antenna of the full anechoic chamber to the sample under test and establish a loopback test mode. S2, connecting the data receiving device to the measuring antenna of the full anechoic chamber, setting the frequency of the measuring channel, recording the initial temperature of the measured sample, and setting the warning temperature value; S3, determining the service to be tested, and measuring the satellite antenna pattern of the sample to be tested under the service to be tested; S4, setting the maximum antenna gain direction of the measured sample to point to the measurement antenna according to the satellite antenna pattern information, aligning the antenna beam vertex of the measured sample with the antenna vertex in the full anechoic chamber, and setting the alignment direction to the test system coordinate system direction; S5, connecting the data receiving device to the θ polarization and the φ polarization of the measuring antenna respectively, capturing the signal emitted by the measured sample, and obtaining the test result of the test point; S6. Configure coordinates for the turntable, repeat S5, complete the test of each test point according to the φ-axis stepping, obtain the test result of each test point, and complete the service performance test of the tested sample.

6. The OTA testing method for IoT NTN satellite communication terminal products based on real-time monitoring by temperature sensors according to claim 5 is characterized in that: In S5, the data receiving device is connected to the θ polarization and the φ polarization of the measuring antenna respectively to capture the signal emitted by the sample under test, and the test result of the test point is obtained, which includes: Connecting the data receiving device to the θ polarization of the measuring antenna, capturing the signal emitted by the measured sample and uploading it to the main control computer for recording; Connect the data receiving device to the φ polarization of the measuring antenna, capture the signal emitted by the measured sample and upload it to the main control computer for recording; The main control computer synthesizes the θ polarization and φ polarization data in a linear value sum manner to generate a test result of the test point.

7. The OTA testing method for IoT NTN satellite communication terminal products based on real-time monitoring by temperature sensors according to claim 5 is characterized in that: The method also includes: during the test process of S4-S6, a temperature monitoring module is used to monitor the temperature value of the sample under test in real time. When the temperature value exceeds the warning temperature value, a warning is issued, and the base station simulator is controlled to disconnect the communication connection and stop the test. When the temperature value returns to normal, the base station simulator is controlled to reconnect the communication and continue the test.

8. The OTA testing method for IoT NTN satellite communication terminal products based on real-time monitoring by temperature sensors according to claim 5 is characterized in that: The method further includes S7, switching a new service to be tested, and repeating steps S3-S6 to complete the testing of all services to be tested.

Images