A method and device for automatically testing and controlling a Beidou navigation receiver

Abstract

The application provides a Beidou navigation receiver automatic test control method and device, and relates to the technical field of navigation test. Through automatic generation of a test template, control signal generation and distribution, automatic data acquisition, performance index calculation and report generation, efficient and reliable testing of the Beidou navigation receiver is realized, and the test efficiency is significantly improved, manual operation errors are reduced, test reliability and standardization are enhanced.

Description

Technical Field

[0001] This application relates to the field of navigation testing technology, and in particular to an automated testing control method and device for Beidou navigation receivers. Background Technology

[0002] As a core terminal device in satellite navigation systems, the performance testing of BeiDou navigation receivers involves verification of multiple dimensions, including carrier-to-noise ratio, positioning accuracy, and startup time. Traditional testing methods rely on manual operation of signal simulators, manual data recording, and offline analysis, which has significant drawbacks. Testers must repeatedly operate instruments and configure parameters, individually verifying each indicator, resulting in a fragmented and time-consuming testing process. In the signal generation stage, manually controlling the combining of BeiDou radio frequency signals and interference signals can easily introduce power deviations, making it difficult to accurately simulate the antenna port's received level. The data acquisition process requires simultaneous monitoring of the receiver's output raw observations, positioning information, and power supply parameters; however, the independent operation of the serial interface and electrical parameter acquisition equipment can easily cause timing misalignments, affecting the accuracy of positioning error and power consumption calculations. Especially in scenarios involving parallel testing of multiple receivers, the difficulty of manually coordinating signal allocation and data acquisition increases dramatically, making real-time comparison and automatic judgment of test results impossible. Furthermore, the measurement of dynamic indicators such as cold start time and reacquisition time is highly dependent on the operator's reaction speed, leading to poor repeatability of test results. Existing technologies lack a unified test template generation mechanism and cannot automatically configure standardized processes according to receiver type, which severely restricts test efficiency and reliability.

[0003] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0004] The purpose of this application is to provide an automated testing and control method and device for Beidou navigation receivers, which significantly improves testing efficiency, reduces human error, enhances testing reliability and standardization.

[0005] Firstly, the automated testing and control method for a Beidou navigation receiver provided in this application adopts the following technical solution: An automated test control method for a Beidou navigation receiver includes: Based on a predefined test case library or user-defined parameters, and combined with the type of the BeiDou navigation receiver under test, the system automatically generates a corresponding test template, configures at least one test item such as carrier-to-noise ratio, positioning error, tracking sensitivity, and module power consumption, and combines them to generate a standardized test process. Based on the scenario configuration file of the test template, the Beidou satellite navigation signal simulator is controlled to generate Beidou radio frequency signals, and the interference signal simulation source is controlled to generate interference signals as needed. The two types of signals are combined into a composite signal, which is then distributed to the signal receiving port of the Beidou navigation receiver under test after power adjustment and on / off control. The system automatically controls the working status of each instrument in the test system through the LAN interface, and simultaneously collects the raw observation and positioning results data output by the Beidou navigation receiver under test, as well as the power supply current and voltage parameters of the receiver under test in real time. The system analyzes the collected data, automatically calculates various performance indicators based on preset standard test algorithms, automatically compares the indicators with preset pass / fail thresholds to generate pass / fail judgments, uploads the test data and judgment results to the system database, and generates a structured test report.

[0006] Optionally, the BeiDou radio frequency signal is one or more frequency points of BeiDou B1I, B1C, B2a, and B3I, and the interference signal is a narrowband interference signal; The processing procedure for composite signals is as follows: the radio frequency signal and the interference signal are combined in a combiner, the signal power is initially adjusted by the first-stage digitally controlled attenuator, the signal power is calibrated to the typical receiving level range of the antenna port of the receiver under test by the low noise amplifier and the second-stage digitally controlled attenuator, the signal is controlled to be switched on and off by the radio frequency switch, and then distributed to each receiver under test port by the power divider.

[0007] Optional instruments include a DC power supply, a BeiDou satellite navigation signal simulator, an interference signal simulation source, and a frequency counter; The raw observation data includes pseudorange, carrier phase, and navigation message. The positioning result data is the latitude, longitude, speed, and other positioning information output by the receiver under test. Data acquisition is achieved through a serial data interface to acquire the receiver output data, and through a voltage and current acquisition circuit to acquire the power supply parameters.

[0008] Optionally, the steps of parsing and calculating various performance indicators according to a preset standard test algorithm include: The C / N0 values ​​of each channel are parsed from the receiver data packets, and their average value and fluctuation range are calculated. The positioning error of the effective positioning point is calculated and the root mean square error is statistically analyzed. The speed error is obtained by comparing the output speed of the receiver with the simulated real speed of the satellite navigation signal simulator. The cold start, warm start, and reacquisition times are calculated separately. The cold start time is the time difference from signal playback or receiver power-on to the first output of valid positioning information that meets the error requirements. The warm start time is the time difference from power-off after the receiver has collected all the ephemeris data and the RTC is powered on, to the first output of valid positioning information. The reacquisition time is the time from signal recovery to the receiver regaining valid positioning information. Adjust the RF signal power to the corresponding value of tracking / acquisition sensitivity, and verify whether the positioning error meets the standard, the cold start time and the positioning accuracy meet the requirements; power consumption calculation: calculate the module power consumption data of the receiver under test according to the collected current and voltage parameters and Ohm's theorem.

[0009] Optionally, all control actions are automatically executed by instructions issued by the automated testing software platform running on the test control and evaluation computer. The generation of test templates, configuration of test items, and combination of test processes are all completed in the graphical interface of the software platform.

[0010] Optionally, the first-stage digitally controlled attenuator is dedicated to precisely adjusting the signal power in conjunction with the acquisition sensitivity and tracking sensitivity tests, and the radio frequency switch is dedicated to controlling the timing of signal on / off in conjunction with the unlock sensitivity, cold start, and hot start tests, and the accuracy of the signal power adjustment matches the sensitivity test requirements of the Beidou navigation receiver under test.

[0011] Optionally, the method supports parallel testing of multiple BeiDou navigation receivers under test. A composite signal is synchronously distributed to the signal receiving ports of multiple receivers under test through a power divider. The output data and electrical parameters of multiple receivers are collected in parallel through a data acquisition and conversion unit. The test results are stored separately according to the receiver number under test, and test judgments and structured reports are generated independently.

[0012] Secondly, this application provides an automated testing device for a BeiDou navigation receiver, used to implement the automated testing control method for BeiDou navigation receivers described above, including: Test control and evaluation computer, Beidou satellite navigation signal simulator, interference signal simulation source, lower-level management and data processing center, radio frequency signal adjustment and distribution unit, data acquisition and conversion unit, and power supply and adaptation unit for the receiver under test; The test control and evaluation computer is the core control unit, which is communicatively connected to the Beidou satellite navigation signal simulator and the interference signal simulation source. The lower-level management and data processing center is equipped with multiple LAN interfaces to interconnect the test control and evaluation computer, the Beidou satellite navigation signal simulator, and the interference signal simulation source, and connects to the control radio frequency signal adjustment and distribution unit, the data acquisition and conversion unit, and the power supply and adaptation unit of the receiver under test. The radio frequency signal adjustment and distribution unit is connected to the BeiDou satellite navigation signal simulator and the interference signal simulation source. The data acquisition and conversion unit and the power supply and adaptation unit of the receiver under test are both connected to the BeiDou navigation receiver under test.

[0013] Optionally, the radio frequency signal adjustment and distribution unit includes a combiner, a first-stage digitally controlled attenuator, a low-noise amplifier, a second-stage digitally controlled attenuator, a radio frequency switch, and a power divider connected in sequence. The combiner is used to fuse BeiDou radio frequency signals and interference signals, and the power divider is used to realize parallel test signal distribution for multiple receivers under test. The test control and evaluation computer runs an automated test software platform. The software platform adopts a modular design and includes a test process module, an instrument driver and program control module, a data communication and parsing module, a performance evaluation algorithm library, and a result generation module.

[0014] Optionally, the data acquisition and conversion unit integrates a serial port to Ethernet port conversion circuit and a voltage and current acquisition circuit, which can acquire the output data of multiple receivers under test in parallel and complete the acquisition of electrical parameters and power consumption conversion calculation. The power supply and adaptation unit of the receiver under test includes a programmable DC power supply, a multi-channel load switch matrix circuit, and a replaceable adapter board. The programmable DC power supply provides programmable voltage and current output, the multi-channel load switch matrix circuit realizes the power-on and power-off control of multiple receivers, and the replaceable adapter board is adapted to Beidou navigation receivers with different shapes and interfaces.

[0015] In summary, this application achieves efficient and reliable testing of BeiDou navigation receivers by automating the generation of test templates, control signal generation and allocation, automatic data acquisition, performance index calculation, and report generation. It significantly improves testing efficiency, reduces human error, and enhances testing reliability and standardization. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating the first embodiment of the automated testing and control method for Beidou navigation receivers in this application; Figure 2 This is a schematic diagram of the hardware architecture of an automated testing device for a Beidou navigation receiver according to this application; Figure 3 This is a schematic diagram of the RF signal adjustment and distribution unit of the automated testing device for Beidou navigation receivers in this application; Figure 4 This is a schematic diagram of the power distribution and power consumption detection hardware architecture of the automated testing device for Beidou navigation receivers in this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] Traditional testing methods for BeiDou navigation receivers typically rely on manual operation or semi-automated equipment. These methods suffer from inefficiencies, repetitive tasks, difficulty in guaranteeing test accuracy and consistency, and long testing cycles in areas such as test case generation, signal simulation, data acquisition, performance evaluation, and report generation. Especially when faced with various receiver types and complex test scenarios, traditional methods struggle to adapt and expand quickly, limiting the comprehensiveness and automation level of the testing.

[0019] This application provides an automated testing and control method for a Beidou navigation receiver, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the automated testing and control method for Beidou navigation receivers in this application.

[0020] For ease of understanding, the following explains some key terms in this embodiment: A test template is a structured file that is automatically generated based on the specific type of BeiDou navigation receiver under test and preset test requirements. It contains test items, parameter settings, and test steps. This template is used to guide the execution of automated tests.

[0021] A standardized testing process refers to a repeatable sequence of tests that combines multiple test items in a predetermined order and logic. This process ensures the consistency and standardization of testing.

[0022] A scenario configuration file is a set of parameters used to describe the working status of the BeiDou satellite navigation signal simulator and the interference signal simulation source. This file defines the characteristics of the simulated signal, such as satellite orbit, signal strength, and interference type.

[0023] A BeiDou satellite navigation signal simulator is a device capable of generating simulated BeiDou satellite navigation radio frequency signals. This simulator is used to perform functional and performance testing of BeiDou navigation receivers in a controlled environment.

[0024] An interference signal simulation source is a device capable of generating various types of interference signals. This simulation source is used to simulate electromagnetic interference that may exist in a real environment in order to evaluate the receiver's immunity to interference.

[0025] A composite signal is a combined signal formed by combining BeiDou radio frequency signals and interference signals. This signal is applied to the receiver under test to simulate a real and complex receiving environment.

[0026] Raw observation data refers to the unprocessed measurement data directly output by the BeiDou navigation receiver after receiving satellite signals, such as pseudorange and carrier phase.

[0027] Positioning result data refers to the position and velocity information of the Beidou navigation receiver calculated based on the original observations.

[0028] The power supply current and voltage parameters refer to the operating current and power supply voltage of the BeiDou navigation receiver under test, which are monitored in real time during the test. These parameters are used to evaluate the power consumption performance of the receiver.

[0029] A pre-defined standard test algorithm refers to the established methods and rules used to process, calculate, and analyze various types of collected data. This algorithm ensures the objectivity and accuracy of performance indicator evaluation.

[0030] The pass / fail threshold refers to the judgment standard set for each performance indicator. When the calculated performance indicator reaches or exceeds the threshold, the test result is judged as pass / fail.

[0031] The pass / fail determination refers to the conclusion that a test item is qualified or unqualified based on the comparison between the performance indicators and the pass threshold.

[0032] A structured test report is a document that organizes configuration information, collected data, performance metrics, and judgment results from the testing process according to a predetermined format. This report facilitates user review and analysis.

[0033] In this embodiment, the automated test control method for Beidou navigation receivers includes: Step S10: Based on the predefined test case library or user-defined parameters, and combined with the type of the Beidou navigation receiver under test, automatically generate the corresponding test template, configure at least one test item such as carrier-to-noise ratio, positioning error, tracking sensitivity, and module power consumption, and combine them to generate a standardized test process.

[0034] Step S20: Based on the scenario configuration file of the test template, control the Beidou satellite navigation signal simulator to generate Beidou radio frequency signals, control the interference signal simulation source to generate interference signals as needed, combine the two types of signals into a composite signal, and then distribute it to the signal receiving port of the Beidou navigation receiver under test after power adjustment and on / off control.

[0035] It should be noted that the BeiDou radio frequency signal is one or more frequency points of BeiDou B1I, B1C, B2a, and B3I, and the interference signal is a narrowband interference signal. The processing of the composite signal is as follows: the radio frequency signal and the interference signal are connected to a combiner and combined. The signal power is initially adjusted by the first-stage digitally controlled attenuator. The signal power is calibrated to the typical receiving level range of the antenna port of the receiver under test by the low-noise amplifier and the second-stage digitally controlled attenuator. After the signal is controlled to be switched on and off by the radio frequency switch, it is distributed to each receiver port under test by the power divider.

[0036] Specifically, BeiDou radio frequency signals refer to radio frequency signals generated by a BeiDou satellite navigation signal simulator to simulate real BeiDou satellite signals. BeiDou B1I, B1C, B2a, and B3I are several commonly used frequency signals in the BeiDou Navigation Satellite System (BDS). The B1I frequency is typically used for civilian navigation and positioning services, B1C is a civilian signal in the next-generation BeiDou system, B2a is a signal used for high-precision positioning and navigation, and B3I is mainly used by licensed users. In actual testing, depending on the frequency type supported by the BeiDou navigation receiver under test and the testing requirements, a single frequency signal can be generated for specific frequency band performance testing, or a combination of multiple frequency signals can be generated to simulate the working state of a multi-frequency receiver in complex environments, comprehensively evaluating its multi-frequency reception, processing, and positioning capabilities. For example, for a receiver supporting dual-frequency reception of B1I and B2a, both frequency signals can be generated simultaneously for testing.

[0037] The interference signal is a narrowband interference signal, specifically referring to interference with a relatively narrow spectral width, usually concentrated within a specific frequency range. This type of interference is quite common in practical applications, such as signals from other wireless communication devices, radar, or specific electronic countermeasures equipment. By simulating narrowband interference signals, the anti-interference capability, signal tracking stability, and positioning accuracy maintenance capability of the tested BeiDou navigation receiver under localized frequency band interference can be evaluated. The narrowband interference signal can be generated using an interference signal simulation source, and its parameters such as frequency, bandwidth, and power can be flexibly configured according to the test scenario and standards.

[0038] The processing of the composite signal aims to precisely control and optimize the combination of the BeiDou radio frequency (RF) signal and the interference signal, delivering it to the receiver under test (DUT) at a level that meets test requirements. First, the RF signal and the interference signal are combined by a combiner to form a composite signal containing navigation information and interference components. The combiner ensures effective fusion of the two signals before they enter the subsequent processing chain. Next, the composite signal enters a first-stage digitally controlled attenuator (DNC), which performs preliminary coarse-tuning of the signal power to meet the basic signal strength requirements of different test scenarios. Then, the signal is amplified by a low-noise amplifier (LNA) to compensate for transmission losses and improve the signal-to-noise ratio (SNR), ensuring signal quality. Following this is a second-stage DNC, which performs fine-tuning of the signal power to precisely reach the typical receive level range required by the DUT's antenna port. This is crucial for simulating real-world receiving environments and conducting critical performance tests such as sensitivity. An RF switch is used to precisely control the on / off state of the composite signal, playing a key role in timing tests such as cold start, warm start, and re-acquisition after lock-down, ensuring the signal is accurately connected or disconnected at specific times. Finally, the processed composite signal is distributed to the signal receiving ports of one or more BeiDou navigation receivers under test via a power divider, enabling effective signal transmission and the possibility of parallel testing of multiple receivers.

[0039] The aforementioned technical solution clarifies the specific frequency types of BeiDou radio frequency signals and the characteristics of interference signals, enabling the test environment to more realistically simulate the actual operation of BeiDou receivers in different frequency bands and complex electromagnetic environments. Simultaneously, through a refined composite signal processing chain, including combiners, two-stage digitally controlled attenuators, low-noise amplifiers, RF switches, and power dividers, precise adjustment of test signal power, optimization of signal quality, and accurate control of signal on / off states are achieved. This not only ensures that the test signal is delivered within a range consistent with the typical reception level of the receiver under test, improving the accuracy and reliability of the test, but also, through the introduction of RF switches, accurately simulates signal interruption and recovery scenarios, providing the necessary conditions for evaluating key performance indicators such as receiver startup time and reacquisition capability. Furthermore, the application of power dividers provides a foundation for parallel testing of multiple receivers, significantly improving test efficiency.

[0040] Understandably, the first-stage digitally controlled attenuator is specifically designed for precise signal power adjustment in conjunction with acquisition sensitivity and tracking sensitivity tests, while the RF switch is specifically designed for timing control of signal on / off states in conjunction with unlock sensitivity, cold start, and hot start tests. Furthermore, the precision of the signal power adjustment matches the sensitivity test requirements of the BeiDou navigation receiver under test.

[0041] Specifically, the first-stage digitally controlled attenuator is a programmable radio frequency attenuator whose attenuation can be precisely set via digital commands. In the acquisition sensitivity test of a BeiDou navigation receiver, the power of the input signal needs to be gradually reduced until the receiver can no longer acquire the satellite signal on its first attempt, in order to determine its minimum acquisition level. Similarly, in the tracking sensitivity test, the power of the acquired signal needs to be gradually reduced until the receiver can no longer continuously track the satellite signal, in order to determine its minimum tracking level. This attenuator, by receiving commands from the test control and evaluation computer, can precisely adjust the signal power in extremely small steps (e.g., 0.1dB or 0.05dB), ensuring meticulous testing near the critical level, thereby accurately evaluating the receiver's acquisition and tracking performance. It can be implemented using a digital step attenuator based on PIN diodes or GaAs FETs, communicating with the control system via SPI or I2C interfaces.

[0042] The RF switch is an electronic device used to control the connection or disconnection of RF signal paths. In unlock sensitivity testing, a sudden interruption or attenuation of the signal to an extremely low level is required to observe when the receiver loses lock. In cold start testing, the receiver powers on or receives a signal for the first time without any prior information, requiring precise control of the signal access timing. In warm start testing, the receiver powers on again after a short power outage, requiring precise control of the signal access timing to evaluate its rapid start-up capability. This RF switch, by receiving precise timing commands from the test control and evaluation computer, can achieve rapid signal switching with millisecond or even microsecond precision, ensuring accurate reproduction of the test scenario and thus accurately measuring the receiver's unlock recovery time, cold start time, and warm start time. It can be implemented using a single-pole double-throw (SPDT) or single-pole multi-throw (SPMT) solid-state RF switch, controlled by TTL levels or digital signals.

[0043] Furthermore, the accuracy of signal power adjustment refers to the degree of deviation between the actual output power and the set power when performing signal attenuation or gain, as well as the minimum adjustable step. Sensitivity testing of BeiDou navigation receivers typically places strict requirements on the power accuracy of the test signal. For example, the test system is required to adjust the power in steps of 0.1dB or even 0.05dB, and maintain a power accuracy of ±0.5dB or even ±0.2dB throughout the entire dynamic range. This high accuracy requirement ensures reliable and repeatable test results when determining the receiver's acquisition or tracking critical point, avoiding measurement errors caused by insufficient accuracy of the test system itself. To achieve this accuracy, in addition to selecting high-precision numerically controlled attenuators, the entire RF link needs to be rigorously calibrated, and the impact of factors such as temperature drift on power stability must be considered.

[0044] The above technical solution dedicates the first-stage numerically controlled attenuator to precisely adjust the signal power during acquisition and tracking sensitivity tests, and the RF switch is dedicated to controlling the signal on / off timing during unlock sensitivity, cold start, and warm start tests. This ensures that the accuracy of the signal power adjustment matches the sensitivity test requirements of the BeiDou navigation receiver under test, enabling the test system to provide highly accurate and repeatable test conditions. This dedicated control strategy significantly improves the accuracy and reliability of testing key performance indicators of BeiDou navigation receivers. For example, in acquisition sensitivity testing, the first-stage numerically controlled attenuator can precisely adjust the signal power in extremely small steps, accurately finding the lowest power point at which the receiver can initially acquire the signal, avoiding test errors caused by excessively large power steps. Simultaneously, the precise timing control of the RF switch allows cold start, warm start, and unlock sensitivity tests to simulate instantaneous signal changes in real-world scenarios, thereby accurately measuring the receiver's response time. Overall, this solution ensures the authority of the test results, providing a solid technical guarantee for the design optimization, production quality control, and performance verification of BeiDou navigation receivers.

[0045] Step S30: Automatically control the working status of each instrument in the test system through the LAN interface, and simultaneously collect the raw observation and positioning results data output by the Beidou navigation receiver under test, as well as the power supply current and voltage parameters of the receiver under test in real time.

[0046] It should be noted that each instrument includes a DC power supply, a BeiDou satellite navigation signal simulator, an interference signal simulation source, and a frequency counter; the raw observation data includes pseudorange, carrier phase, and navigation message, and the positioning result data is the latitude, longitude, speed, and other positioning information output by the receiver under test; data acquisition is achieved through a serial data interface to acquire the receiver output data, and through a voltage and current acquisition circuit to acquire the power supply parameters.

[0047] The above technical solution clarifies the specific types of instruments in the testing system and defines in detail the raw observation data, positioning result data, and power supply parameters that need to be collected. This embodiment ensures the standardization of the testing environment and the comprehensiveness of the test data. Simultaneously, by specifying a serial data interface for receiver data acquisition and voltage and current acquisition circuits for power supply parameter acquisition, the data acquisition process is automated and highly accurate, effectively avoiding test blind spots and errors caused by unclear data types or inconsistent acquisition methods. This enables the testing system to conduct a more in-depth and accurate evaluation of various performance indicators of the BeiDou navigation receiver, thereby significantly improving the reliability and diagnostic capabilities of the test results.

[0048] Step S40: Analyze the collected data, automatically calculate various performance indicators according to the preset standard test algorithm, automatically compare the indicators with the preset pass / fail threshold to generate a pass / fail judgment, upload the test data and judgment results to the system database and generate a structured test report.

[0049] In specific implementation, the steps of parsing and calculating various performance indicators according to the preset standard test algorithm include: parsing the C / N0 values ​​of each channel from the receiver data packet, and statistically analyzing their average value and fluctuation range; calculating the positioning error of the effective positioning point and statistically analyzing the root mean square error, and comparing the receiver output speed with the simulated real speed of the satellite navigation signal simulator to obtain the speed error; calculating the cold start, warm start, and reacquisition time respectively, wherein the cold start time is the time difference from signal playback or receiver power-on to the first output of effective positioning information that meets the error requirements, the warm start time is the time difference from power-off after the receiver has collected all the ephemeris data and ensured normal power supply to the RTC, to power-on again to the first output of effective positioning information, and the reacquisition time is the time from signal recovery to the receiver regaining effective positioning information; adjusting the RF signal power to the corresponding value of tracking / acquisition sensitivity, and verifying whether the positioning error meets the standard, and whether the cold start time and positioning accuracy meet the requirements respectively; power consumption calculation: based on the collected current and voltage parameters, calculating the module power consumption data of the receiver under test using Ohm's theorem.

[0050] In detail, the test control and evaluation computer acquires positioning data such as latitude, longitude, and velocity output from the BeiDou navigation receiver under test. Simultaneously, the BeiDou satellite navigation signal simulator provides real position and velocity data corresponding to the simulated scenario. The performance evaluation algorithm library compares the position information of each valid positioning point output by the receiver with the simulated real position from the simulator, calculates the positioning errors in the horizontal and vertical directions, and further calculates the root mean square (RMSE) values ​​of these errors to comprehensively evaluate positioning accuracy. Furthermore, the velocity data output by the receiver is also compared with the simulated real velocity from the simulator to calculate the velocity error, thereby evaluating the receiver's velocity measurement performance.

[0051] Based on this, the cold start time is calculated from the moment the BeiDou navigation receiver under test is powered on or when it is in a state without any auxiliary information, until the receiver outputs valid positioning information that meets the preset error requirements for the first time. The warm start time is calculated from the moment the receiver is powered off but its internal real-time clock (RTC) remains active (i.e., there is time information) and then powered on again, until the receiver outputs valid positioning information for the first time. The reacquisition time is calculated from the moment the BeiDou radio frequency signal is restored after a brief interruption, until the receiver regains valid positioning information. The precise measurement of these time parameters aims to evaluate the receiver's response speed and availability under different startup and signal recovery scenarios.

[0052] Furthermore, the test control and evaluation computer precisely adjusts the power of the BeiDou radio frequency signal to the preset tracking or acquisition sensitivity level by controlling the numerically controlled attenuator in the radio frequency signal adjustment and distribution unit. Under this weak signal condition, the system will again calculate and evaluate performance indicators such as positioning error, cold start time, and positioning accuracy. This step aims to verify the performance of the BeiDou navigation receiver under test in extremely weak signal environments and ensure its reliability under harsh operating conditions.

[0053] Simultaneously, the voltage and current acquisition circuit in the data acquisition and conversion unit obtains the power supply current and voltage parameters of the BeiDou navigation receiver under test in real time. The performance evaluation algorithm library receives this acquired data and automatically calculates the module power consumption data of the receiver under test in different operating modes based on Ohm's law (P = U×I). This step aims to evaluate the energy efficiency level of the receiver and provide key references for product design and optimization.

[0054] Through the above technical solution, this embodiment provides a more refined and comprehensive method for calculating the performance indicators of BeiDou navigation receivers. By specifying and standardizing the calculation and evaluation of key indicators such as carrier-to-noise ratio, positioning error, velocity error, cold start time, hot start time, reacquisition time, and power consumption, it overcomes the limitations of general and insufficiently in-depth performance indicator calculations in traditional automated testing. This enables the testing system to more accurately quantify the receiver's performance in terms of signal quality, positioning accuracy, response speed, and energy efficiency, especially its performance in weak signal and dynamically changing environments. This solution not only enhances the depth and breadth of automated testing, ensuring the reliability and comparability of test results, but also provides more detailed and robust technical support for the design optimization and quality control of the BeiDou navigation receiver under test.

[0055] It is understood that all control actions are automatically executed by the automated testing software platform running on the test control and evaluation computer, and the generation of test templates, configuration of test items, and combination of test processes are all completed in the graphical interface of the software platform.

[0056] Through the above technical solution, all control actions are centralized and automatically executed by an automated testing software platform running on the test control and evaluation computer. Specifically, the platform's graphical interface facilitates the generation of test templates, configuration of test items, and combination of test procedures, significantly simplifying the operational complexity of the testing system. Users do not need in-depth knowledge of underlying instrument control protocols or complex programming; they can quickly and accurately define and program test tasks through the intuitive graphical interface. This not only significantly lowers the technical threshold for operators and reduces errors that may be introduced by manual configuration, but also improves the configuration efficiency and flexibility of the test process. Based on this, and combined with the overall technical concept of automatically generating test templates, automatically controlling instruments, acquiring data in real time, and automatically evaluating performance, this solution ensures a high degree of automation and intelligence throughout the entire BeiDou navigation receiver automated testing process, from initial preparation to final execution and evaluation, thereby improving the accuracy, repeatability, and overall efficiency of the test.

[0057] It should be noted that in practical applications, when a large number of BeiDou navigation receivers need to be tested, testing them one by one is inefficient and time-consuming, making it difficult to meet the needs of mass production or large-scale verification.

[0058] To address the aforementioned issues, this embodiment proposes a method that supports parallel testing of multiple BeiDou navigation receivers under test. A power divider synchronously distributes a composite signal to the signal receiving ports of multiple receivers under test. A data acquisition and conversion unit performs parallel acquisition of the output data and electrical parameters of multiple receivers. Furthermore, the test results are stored separately according to the receiver number under test, and test judgments and structured reports are generated independently.

[0059] Specifically, parallel testing refers to conducting tests on multiple objects under test simultaneously within the same time period, using a single testing system or partially shared testing resources. For BeiDou navigation receivers, this means that multiple receivers can simultaneously receive test signals, output data, and perform performance evaluations, thereby significantly improving testing efficiency and throughput. Implementing parallel testing typically requires specialized design for signal allocation, data acquisition, and result processing.

[0060] A power divider is a radio frequency device that distributes a single input signal into multiple output signals with equal or proportional power. In this application, the power divider receives a composite signal generated by combining a BeiDou satellite navigation signal simulator and an interference signal simulation source, and accurately distributes it to the signal receiving ports of multiple BeiDou navigation receivers under test. To ensure test accuracy, the selected power divider should have good port isolation, low insertion loss, and minimal amplitude / phase imbalance to guarantee the consistency of signal quality and level received by each receiver under test. Furthermore, the number of ports on the power divider should match the number of receivers being tested in parallel; for example, if four receivers need to be tested in parallel, a 1-to-4 power divider can be used.

[0061] The data acquisition and conversion unit is responsible for synchronously acquiring raw observation data, positioning results data, and electrical parameters such as power supply current and voltage from multiple BeiDou navigation receivers under test. To achieve parallel acquisition, this unit typically integrates multiple data interfaces (e.g., multiple serial data interfaces or network interfaces) and multiple voltage and current acquisition channels. Each channel operates independently, ensuring that data from different receivers does not interfere with each other and can be acquired with high synchronization. The acquired analog signals (such as voltage and current) are converted into digital signals through analog-to-digital converters (ADCs), while the digital data (such as serial data) is directly buffered and transmitted.

[0062] To clearly manage the results of parallel testing, the system assigns a unique number or identifier to each BeiDou navigation receiver under test. All test data, performance index calculations, and final pass / fail determinations related to that receiver are associated with this number and stored independently in the system database. After testing, the system generates a structured test report independently for each receiver with this number. The report details all test results, judgments, and related test conditions and configuration information for that receiver. This independent storage and reporting mechanism ensures that even in a parallel testing environment, the traceability of each receiver's tests and the independence of its results are fully guaranteed.

[0063] Through the above technical solution, this embodiment effectively solves the problem of low efficiency in automated testing methods for single BeiDou navigation receivers when facing batch testing requirements. By introducing a power divider to achieve synchronous distribution of composite signals, multiple BeiDou navigation receivers under test can simultaneously receive consistent test signals, thereby initiating testing within the same time period. The parallel acquisition capability of the data acquisition and conversion unit ensures that the output data and electrical parameters of multiple receivers can be acquired efficiently and synchronously, avoiding data acquisition bottlenecks. In addition, test results are stored separately according to the receiver number under test and reports are generated independently, ensuring the independence and traceability of test results for each receiver, greatly improving test throughput and overall efficiency, significantly shortening the test cycle, and reducing test costs, making it particularly suitable for the mass production and quality control of BeiDou navigation receivers.

[0064] This embodiment achieves efficient and reliable testing of Beidou navigation receivers by automatically generating test templates, generating and distributing control signals, automatically collecting data, calculating performance indicators, and generating reports. It significantly improves testing efficiency, reduces human error, and enhances testing reliability and standardization.

[0065] This application also discloses an automated testing device for BeiDou navigation receivers, used to implement the aforementioned automated testing control method for BeiDou navigation receivers, such as... Figure 2 As shown, the system includes a test control and evaluation computer, a BeiDou satellite navigation signal simulator, an interference signal simulation source, a lower-level management and data processing center, a radio frequency signal adjustment and distribution unit, a data acquisition and conversion unit, and a power supply and adaptation unit for the receiver under test. The test control and evaluation computer is the core control unit, communicating with the BeiDou satellite navigation signal simulator and the interference signal simulation source. The lower-level management and data processing center is equipped with multiple LAN interfaces, interconnecting the test control and evaluation computer, the BeiDou satellite navigation signal simulator, and the interference signal simulation source, and connecting to control the radio frequency signal adjustment and distribution unit, the data acquisition and conversion unit, and the power supply and adaptation unit for the receiver under test. The radio frequency signal adjustment and distribution unit is connected to the BeiDou satellite navigation signal simulator and the interference signal simulation source. The data acquisition and conversion unit and the power supply and adaptation unit for the receiver under test are both connected to the BeiDou navigation receiver under test.

[0066] Specifically, the test control and evaluation computer, as the core control unit, uses an automated test software platform to uniformly schedule the BeiDou satellite navigation signal simulator to generate BeiDou radio frequency signals and the interference signal simulation source to generate interference signals. The lower-level management and data processing center utilizes multiple LAN interfaces to achieve efficient communication between the test control and evaluation computer, the BeiDou satellite navigation signal simulator, and the interference signal simulation source. It also precisely controls the radio frequency signal adjustment and distribution unit to complete signal combining, power adjustment, and on / off control. Simultaneously, it coordinates the data acquisition and conversion unit to acquire the raw observations and positioning results of the BeiDou navigation receiver under test in real time. The test unit collects data and power supply current and voltage parameters; the radio frequency signal adjustment and distribution unit combines the Beidou radio frequency signal and interference signal through a combiner, and then uses a digitally controlled attenuator and radio frequency switch to achieve precise calibration of signal power and on / off timing control, and finally distributes the signal to multiple receivers under test through a power divider; the data acquisition and conversion unit integrates serial port to Ethernet port conversion circuit and voltage and current acquisition circuit, synchronously acquires the output data of multiple receivers and completes electrical parameter conversion; the power supply and adaptation unit of the receiver under test provides programmable power supply and power-on / off control through a programmable DC power supply and a multi-channel load switch matrix circuit to ensure standardized execution of the test process.

[0067] Through the above technical solution, the collaborative work of the test control and evaluation computer and the lower-level management and data processing center effectively avoids errors introduced by manual operation. The precise power control of the radio frequency signal adjustment and distribution unit meets the requirements of different sensitivity test indicators. The parallel processing capability of the data acquisition and conversion unit supports the synchronous testing of multiple receivers. Thus, the test process is automated, the data acquisition is real-time, and the result judgment is objective. This significantly improves test efficiency and consistency, shortens the test cycle, and can flexibly adapt to the complex test requirements of various types of Beidou navigation receivers.

[0068] In the automated testing of BeiDou navigation receivers, to ensure accuracy, efficiency, and flexibility, it is necessary to perform refined processing and allocation of radio frequency (RF) signals and to manage the entire testing process efficiently and reliably. However, if the internal structure of the RF signal adjustment and allocation unit is not sufficiently robust, or if the automated testing software platform lacks a clear modular design, it may lead to insufficient signal control precision, difficulty in flexibly configuring the testing process, and challenges in system maintenance and expansion. This can affect the reliability of test results and the overall performance of the testing system, especially in scenarios requiring parallel testing of multiple receivers or high-precision sensitivity testing, where these problems become even more pronounced.

[0069] like Figure 3As shown in the illustration, this embodiment further proposes that the RF signal adjustment and distribution unit includes a combiner, a first-stage digitally controlled attenuator, a low-noise amplifier, a second-stage digitally controlled attenuator, an RF switch, and a power divider connected in sequence. The combiner is used to fuse BeiDou RF signals and interference signals, and the power divider is used to distribute test signals to multiple receivers under test in parallel. Simultaneously, the test control and evaluation computer runs an automated test software platform. This software platform adopts a modular design, including a test process module, an instrument driver and programmable control module, a data communication and parsing module, a performance evaluation algorithm library, and a result generation module.

[0070] Specifically, a combiner is a radio frequency (RF) device that fuses the BeiDou RF signal generated by the BeiDou satellite navigation signal simulator with the interference signal generated by the interference signal simulation source to form a composite signal. This ensures that the BeiDou navigation receiver under test can simultaneously receive the required navigation signal and any potential interference signals, simulating the working state in a real environment. The first-stage digitally controlled attenuator (DNA) is used for preliminary power adjustment of the combined composite signal. Its "digitally controlled" characteristic means that the attenuation can be precisely controlled by digital commands. For example, commands can be sent via host computer software to adjust the digital step attenuation unit inside the attenuator, thereby achieving coarse adjustment of the signal power and providing a basis for subsequent fine calibration. A low-noise amplifier (LNA) is an amplifier specifically designed to amplify weak signals while introducing extremely low noise. In this embodiment, the LNA is placed after the first-stage DNA to compensate for losses that may occur during signal transmission and attenuation, and to improve the signal-to-noise ratio, ensuring the signal quality for subsequent processing. After the LNA amplifies the signal, the second-stage DNA is used for more precise calibration of the signal power. The purpose is to precisely adjust the power of the composite signal to the typical receiving level range of the antenna port of the BeiDou navigation receiver under test, simulating the actual receiving scenario and meeting the stringent requirements for signal power accuracy in various test items (such as sensitivity testing). An RF switch is used to control the on / off state of the composite signal. By controlling the opening and closing of the RF switch, rapid signal switching can be achieved, which is crucial for tests requiring precise control of the signal appearance and disappearance timing, such as cold start, warm start, and re-acquisition after loss of lock. For example, in a cold start test, the signal can be precisely turned on after the receiver is powered on, and the first positioning time can be recorded. A power divider is a device that distributes a single input signal into multiple output signals with equal or proportional power. Here, the power divider is used to distribute the adjusted and controlled composite signal to the signal receiving ports of multiple BeiDou navigation receivers under test, thereby enabling parallel testing of multiple receivers and significantly improving test efficiency.

[0071] Furthermore, the automated testing software platform runs on the test control and evaluation computer, serving as the core control hub of the entire automated testing system. It is responsible for receiving user instructions, managing the test process, coordinating the operation of various instruments and equipment, collecting and processing data, and generating reports. This software platform adopts a modular design, meaning its functions are divided into independent, replaceable modules, each responsible for a specific function. This design improves the software's maintainability, scalability, and reusability, enabling the system to flexibly adapt to different testing needs and future functional upgrades. Specifically, the test process module is responsible for defining, storing, and executing preset test processes. It manages the sequence of test steps, conditional judgments, and loop logic, ensuring that tests run automatically according to established specifications. The instrument driver and programmable control module encapsulates the interfaces and protocols for communication with various test instruments (such as BeiDou satellite navigation signal simulators, interference signal simulation sources, DC power supplies, etc.). It is responsible for converting the host computer's control commands into instrument-recognizable commands and receiving instrument status feedback, achieving precise programmable control of the test instruments. The data communication and parsing module is responsible for data interaction with the BeiDou navigation receiver under test. This includes receiving raw observation and positioning results data via a serial data interface, and acquiring power supply parameters through voltage and current acquisition circuits. It also parses and formats the received raw data, providing standardized data input for subsequent performance evaluation. The performance evaluation algorithm library contains a series of algorithms for calculating various performance indicators of the BeiDou navigation receiver, such as C / N0 calculation, positioning error statistics, startup time calculation, and power consumption calculation. These algorithms have been standardized and optimized to ensure the accuracy and consistency of performance evaluation. The results generation module integrates the performance evaluation data and judgment results, and generates a structured test report according to a preset template. The report typically includes test items, test conditions, performance indicators, pass / fail criteria, and relevant charts and data for easy user review and analysis.

[0072] Through the above technical solution, the combiner, first-stage digitally controlled attenuator, low-noise amplifier, second-stage digitally controlled attenuator, RF switch, and power divider within the RF signal adjustment and distribution unit work together to construct a complete and precise signal chain. The combiner ensures the effective fusion of navigation and interference signals. The first and second-stage digitally controlled attenuators, in conjunction with the low-noise amplifier, achieve wide-range, high-precision adjustment and calibration of the composite signal power, accurately simulating different receiving level scenarios and meeting the stringent requirements for signal power, such as sensitivity testing. The RF switch provides fast and precise timing control of signal on / off states, which is crucial for dynamic tests such as cold start and hot start. The introduction of the power divider enables a single composite signal to be simultaneously distributed to multiple receivers under test, greatly improving test efficiency and enabling parallel testing. Meanwhile, the automated test software platform running on the test control and evaluation computer adopts a modular design, decomposing complex test functions into test process modules, instrument driver and program control modules, data communication and parsing modules, performance evaluation algorithm libraries, and result generation modules. This design gives the testing system high flexibility and scalability, allowing users to easily configure testing procedures, integrate new instruments and equipment, update performance evaluation algorithms, and efficiently process and analyze various types of test data according to their needs. The clear responsibilities of each module reduce the complexity of system development and maintenance costs, while improving software stability and reliability. Overall, these improvements ensure that the BeiDou navigation receiver automated testing system can provide high-precision, high-efficiency, and high-reliability testing services, effectively solving problems such as imprecise signal control, low testing efficiency, and rigid software systems in traditional testing. It demonstrates significant advantages, especially in multi-receiver parallel testing and complex scenario simulation.

[0073] In the implementation of the automated testing device for BeiDou navigation receivers, a key challenge in improving testing efficiency and versatility is how to efficiently and accurately collect various output data from multiple receivers under test in parallel, while ensuring that the testing system can flexibly adapt to receivers under test with different models, interfaces, and power supply requirements. Insufficient data acquisition and power supply adaptation capabilities will lead to complex and time-consuming testing processes, making it difficult to meet diverse testing needs.

[0074] like Figure 4As shown, this embodiment further proposes an automated testing device for BeiDou navigation receivers. The data acquisition and conversion unit integrates a serial-to-Ethernet conversion circuit and a voltage and current acquisition circuit, enabling parallel acquisition of output data from multiple receivers under test and completion of electrical parameter acquisition and power consumption conversion calculations. The power supply and adaptation unit for the receivers under test includes a programmable DC power supply, a multi-channel load switch matrix circuit, and a replaceable adapter board. The programmable DC power supply provides programmable voltage and current outputs, the multi-channel load switch matrix circuit controls the power-on and power-off of multiple receivers, and the replaceable adapter board adapts to BeiDou navigation receivers with different shapes and interfaces.

[0075] Specifically, the serial-to-Ethernet converter integrated in the data acquisition and conversion unit converts the serial data outputs commonly used by BeiDou navigation receivers (such as RS232, RS485, UART, etc.) into standard Ethernet protocol data packets, thereby enabling high-speed, long-distance data transmission and centralized management. This solves the problems of diverse data interfaces for multiple receivers and the low efficiency of traditional serial communication. This circuit can be implemented using a dedicated protocol conversion chip or an embedded processor (such as an ARM- or FPGA-based microcontroller) and run corresponding firmware to complete the protocol conversion function.

[0076] Simultaneously, the voltage and current acquisition circuit integrated in the data acquisition and conversion unit is used to measure the power supply voltage and current of the BeiDou navigation receiver under test in real time and with high accuracy. These electrical parameters are the fundamental data for calculating the receiver's power consumption. This circuit typically consists of a high-precision analog-to-digital converter (ADC), a current sampling resistor (or Hall sensor), and a voltage divider circuit, which can convert analog voltage and current signals into digital signals for subsequent processing. Through the above integration, the data acquisition and conversion unit can achieve multi-channel parallel data acquisition, that is, simultaneously acquire the raw observation and positioning result data output from multiple receivers under test, and synchronously acquire the power supply electrical parameters of each receiver, thereby completing the real-time conversion and calculation of power consumption.

[0077] On the other hand, the programmable DC power supply in the power supply and adaptation unit of the receiver under test (DUT) provides a stable and programmable DC power supply to the DUT's BeiDou navigation receiver. This power supply can precisely adjust the output voltage and current via software commands according to test requirements to meet the power supply requirements of different receiver models, and can simulate various power supply conditions (such as voltage fluctuations and momentary power outages). This power supply typically features high precision and low ripple, and communicates with the test control and evaluation computer via standard communication interfaces (such as GPIB, RS232, and LAN).

[0078] The multi-load switch matrix circuit is used to independently control the power supply to multiple BeiDou navigation receivers under test. Through this circuit, the test system can precisely control the power-on and power-off sequence of each receiver, as well as simulate the instantaneous switching of power supply under specific test scenarios (such as cold start and hot start tests), thereby achieving automated and refined power management. This circuit is typically composed of switching elements such as relays or power MOSFETs and is driven by control logic.

[0079] Furthermore, the replaceable adapter board design aims to provide flexibility in physical interfaces and electrical connections to accommodate BeiDou navigation receivers of different form factors, pin definitions, and interface types. Given the wide variety of BeiDou navigation receiver models and interfaces on the market, the replaceable adapter board employs a modular design. Each adapter board can be customized for a specific model or interface type, integrating corresponding connectors, level conversion circuits, and signal isolation circuits. By quickly plugging and unplugging the adapter board, the test system can rapidly adapt to new test objects, greatly improving the versatility and compatibility of the test system.

[0080] Through the above technical solution, the data acquisition and conversion unit can efficiently convert serial port data from multiple receivers under test into network data and accurately acquire power supply parameters, realizing multi-channel parallel data acquisition and real-time power consumption calculation, greatly improving the efficiency and accuracy of data acquisition. Meanwhile, the receiver under test power supply and adaptation unit provides flexible power supply capabilities through a programmable DC power supply, and the multi-channel load switch matrix circuit enables independent and precise power-on / off control of multiple receivers. The replaceable adapter board effectively solves the compatibility issues of physical interfaces and electrical connections for different receiver models. Overall, this solution significantly improves the versatility, flexibility, and testing efficiency of the BeiDou navigation receiver automated testing system, reduces manual intervention, and ensures the reliability of test results.

[0081] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this application. In practical applications, those skilled in the art can select some or all of it to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0082] In addition, for technical details not described in detail in this embodiment, please refer to the method for automated testing and control of Beidou navigation receivers provided in any embodiment of this application, which will not be repeated here.

[0083] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system 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 system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0084] The sequence numbers of the embodiments in this application are merely for description and do not represent the superiority or inferiority of the embodiments. Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of this application. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An automated testing and control method for a Beidou navigation receiver, characterized in that, include: Based on a predefined test case library or user-defined parameters, and combined with the type of the BeiDou navigation receiver under test, the system automatically generates a corresponding test template, configures at least one test item such as carrier-to-noise ratio, positioning error, tracking sensitivity, and module power consumption, and combines them to generate a standardized test process. Based on the scenario configuration file of the test template, the Beidou satellite navigation signal simulator is controlled to generate Beidou radio frequency signals, and the interference signal simulation source is controlled to generate interference signals as needed. The two types of signals are combined into a composite signal, which is then distributed to the signal receiving port of the Beidou navigation receiver under test after power adjustment and on / off control. The system automatically controls the working status of each instrument in the test system through the LAN interface, and simultaneously collects the raw observation and positioning results data output by the Beidou navigation receiver under test, as well as the power supply current and voltage parameters of the receiver under test in real time. The system analyzes the collected data, automatically calculates various performance indicators based on preset standard test algorithms, automatically compares the indicators with preset pass / fail thresholds to generate pass / fail judgments, uploads the test data and judgment results to the system database, and generates a structured test report.

2. The automated testing and control method for Beidou navigation receivers according to claim 1, characterized in that, The BeiDou radio frequency signal is one or more frequency points of BeiDou B1I, B1C, B2a, and B3I, and the interference signal is a narrowband interference signal; The processing procedure for composite signals is as follows: the radio frequency signal and the interference signal are combined in a combiner, the signal power is initially adjusted by the first-stage digitally controlled attenuator, the signal power is calibrated to the typical receiving level range of the antenna port of the receiver under test by the low noise amplifier and the second-stage digitally controlled attenuator, the signal is controlled to be switched on and off by the radio frequency switch, and then distributed to each receiver under test port by the power divider.

3. The automated testing and control method for Beidou navigation receivers according to claim 1, characterized in that, Each instrument includes a DC power supply, a BeiDou satellite navigation signal simulator, an interference signal simulation source, and a frequency counter; The original observation data includes pseudorange, carrier phase, and navigation message, while the positioning result data is the latitude, longitude, speed, and other positioning information output by the receiver under test. Data acquisition is achieved through a serial data interface to acquire receiver output data, and through a voltage and current acquisition circuit to acquire power supply parameters.

4. The automated testing and control method for Beidou navigation receivers according to claim 1, characterized in that, The steps for parsing and calculating various performance indicators according to the preset standard test algorithm include: The C / N0 values ​​of each channel are parsed from the receiver data packets, and their average value and fluctuation range are calculated. The positioning error of the effective positioning point is calculated and the root mean square error is statistically analyzed. The speed error is obtained by comparing the output speed of the receiver with the simulated real speed of the satellite navigation signal simulator. The cold start, warm start, and reacquisition times are calculated separately. The cold start time is the time difference from signal playback or receiver power-on to the first output of valid positioning information that meets the error requirements. The warm start time is the time difference from power-off after the receiver has collected all the ephemeris data and the RTC is powered on, to the first output of valid positioning information. The reacquisition time is the time from signal recovery to the receiver regaining valid positioning information. Adjust the RF signal power to the corresponding value of tracking / acquisition sensitivity, and verify whether the positioning error meets the standard, the cold start time and the positioning accuracy meet the requirements; power consumption calculation: calculate the module power consumption data of the receiver under test according to the collected current and voltage parameters and Ohm's theorem.

5. The automated testing and control method for Beidou navigation receivers according to claim 1, characterized in that, All control actions are automatically executed by the automated testing software platform running on the test control and evaluation computer. The generation of test templates, configuration of test items, and combination of test processes are all completed in the graphical interface of the software platform.

6. The automated testing and control method for Beidou navigation receivers according to claim 2, characterized in that, The first-stage digitally controlled attenuator is specifically designed for precise signal power adjustment in conjunction with acquisition sensitivity and tracking sensitivity tests. The radio frequency switch is specifically designed for timing control of signal on / off states in conjunction with unlock sensitivity, cold start, and hot start tests. The precision of the signal power adjustment matches the sensitivity test requirements of the BeiDou navigation receiver under test.

7. The automated test and control method for Beidou navigation receivers according to claim 1, characterized in that, The method supports parallel testing of multiple BeiDou navigation receivers under test. A power divider synchronously distributes a composite signal to the signal receiving ports of multiple receivers under test. The data acquisition and conversion unit collects the output data and electrical parameters of multiple receivers in parallel. The test results are stored separately according to the receiver number under test, and test judgments and structured reports are generated independently.

8. An automated testing device for a Beidou navigation receiver, used to implement the automated testing control method for a Beidou navigation receiver as described in any one of claims 1-7, characterized in that, include: Test control and evaluation computer, Beidou satellite navigation signal simulator, interference signal simulation source, lower-level management and data processing center, radio frequency signal adjustment and distribution unit, data acquisition and conversion unit, and power supply and adaptation unit for the receiver under test; The test control and evaluation computer is the core control unit, which is communicatively connected to the Beidou satellite navigation signal simulator and the interference signal simulation source. The lower-level management and data processing center is equipped with multiple LAN interfaces to interconnect the test control and evaluation computer, the Beidou satellite navigation signal simulator, and the interference signal simulation source, and connects to the control radio frequency signal adjustment and distribution unit, the data acquisition and conversion unit, and the power supply and adaptation unit of the receiver under test. The radio frequency signal adjustment and distribution unit is connected to the BeiDou satellite navigation signal simulator and the interference signal simulation source. The data acquisition and conversion unit and the power supply and adaptation unit of the receiver under test are both connected to the BeiDou navigation receiver under test.

9. The automated testing device for Beidou navigation receivers according to claim 8, characterized in that, The radio frequency signal adjustment and distribution unit includes a combiner, a first-stage digitally controlled attenuator, a low-noise amplifier, a second-stage digitally controlled attenuator, a radio frequency switch, and a power divider connected in sequence. The combiner is used to fuse BeiDou radio frequency signals and interference signals, and the power divider is used to realize the parallel test signal distribution of multiple receivers under test. The test control and evaluation computer runs an automated test software platform. The software platform adopts a modular design and includes a test process module, an instrument driver and program control module, a data communication and parsing module, a performance evaluation algorithm library, and a result generation module.

10. The automated testing device for Beidou navigation receivers according to claim 8, characterized in that, The data acquisition and conversion unit integrates a serial port to Ethernet port conversion circuit and a voltage and current acquisition circuit, which can acquire the output data of multiple receivers under test in parallel and complete the acquisition of electrical parameters and power consumption conversion calculation. The power supply and adaptation unit of the receiver under test includes a programmable DC power supply, a multi-channel load switch matrix circuit, and a replaceable adapter board. The programmable DC power supply provides programmable voltage and current output, the multi-channel load switch matrix circuit realizes the power-on and power-off control of multiple receivers, and the replaceable adapter board is adapted to Beidou navigation receivers with different shapes and interfaces.

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