Production test system and method of Bluetooth module

Abstract

The invention discloses a production test system and method for a Bluetooth module, relates to the technical field of Bluetooth module testing, and solves the problem that the stability of electronic components in the Bluetooth module is poor due to the fact that too high temperature is not considered in the prior art. And over-high humidity can cause water vapor in the air to be condensed on a circuit board in the Bluetooth module, so that the insulating property is reduced. The method comprises the steps of collecting environment data of a target area in real time; the environment early warning evaluation coefficient is calculated based on the environment data, and whether the early warning information is sent or not is judged based on the environment early warning evaluation coefficient and the preset environment threshold value, so that the problem that the influence of environment factors on the production test of the Bluetooth module is not considered in the prior art is solved; by simulating the electromagnetic interference scene and controlling the output power and the frequency point of the Bluetooth tester, the signal intensity change and the error rate of the to-be-tested Bluetooth module can be accurately measured and analyzed, and the performance of the Bluetooth module in different electromagnetic interference scenes can be evaluated.

Description

Technical Field

[0001] The invention belongs to the field of Bluetooth module testing, and in particular relates to a production testing system and method for a Bluetooth module. Background Art

[0002] With the rapid development of Internet of Things technology, Bluetooth modules, as key components of wireless communications, have been widely used in fields such as smart homes and automotive electronics. However, in the production process of Bluetooth modules, how to ensure the stable performance and complete functions of each module is an important challenge faced by manufacturers. Traditional manual testing methods are inefficient and easily affected by human factors, making it difficult to meet the needs of large-scale production.

[0003] The prior art (invention patent with application number CN2018112697043) discloses a Bluetooth module production test system and method, which belongs to the field of Bluetooth module testing. This invention patent solves the problem that the current Bluetooth module test needs to use the corresponding Bluetooth test device, the test cost is high, and the test process is cumbersome. The key points of its technical solution are: the system includes a Bluetooth module to be tested, a Bluetooth module, a power supply and a PC host computer, the Bluetooth module to be tested is used to connect to the power supply, the Bluetooth module is connected to the power supply and the PC host computer respectively, and a specific test firmware is burned in the Bluetooth module; the method mainly uses the specific test firmware in the Bluetooth module to capture the MAC address and signal strength in the broadcast packet sent during the production test of the Bluetooth module to be tested in real time, and sends the captured MAC address and the corresponding signal strength value to the PC host computer software. The host computer software determines whether it is within the specified parameter range. If it is, it displays that the Bluetooth module to be tested is qualified, and if not, it alarms. However, the existing technology does not take into account the impact of environmental factors on the production and testing of Bluetooth modules. Excessively high temperatures will cause the stability of electronic components within the Bluetooth module to deteriorate, and the processor and other digital circuits may operate unstably at high temperatures, resulting in slower signal processing or increased error rates. Excessively high humidity will cause water vapor in the air to condense on the circuit board inside the Bluetooth module, resulting in reduced insulation performance and increased risk of short circuits, affecting the signal transmission quality and the overall performance of the module. For Bluetooth modules with optical windows (such as Bluetooth modules using light sensors), high humidity may form water mist or condensation on the window, affecting signal penetration.

[0004] Therefore, the present invention proposes a production test system and method for a Bluetooth module to solve the above problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a production test system and method for a Bluetooth module, which is used to solve the problem that the prior art does not take into account the impact of environmental factors on the production test of Bluetooth modules; the performance of electronic components in the Bluetooth module, such as crystal oscillators, resistors, capacitors and integrated circuits, changes with temperature. For example, the frequency of the crystal oscillator may drift due to temperature changes, affecting the stability of Bluetooth communication, and excessively high temperatures may cause the stability of electronic components in the Bluetooth module to deteriorate, and the processor and other digital circuits may operate unstably at high temperatures, resulting in slower signal processing speed or increased error rate; excessively high humidity may cause water vapor in the air to condense on the circuit board inside the Bluetooth module, resulting in reduced insulation performance, increased risk of short circuits, and affecting the signal transmission quality and the overall performance of the module. For Bluetooth modules with optical windows (such as those using light sensors), high humidity may form water mist or condensation on the window, affecting the technical problem of signal penetration.

[0006] To achieve the above object, a first aspect of the present invention provides a production test system for a Bluetooth module, comprising: a data acquisition module, a data analysis module and a Bluetooth module test module; Data acquisition module: used to collect environmental data of the target area in real time; and to obtain signal quality parameters of the Bluetooth module to be tested in a preset electromagnetic interference scenario; wherein the signal quality parameters include: signal strength and bit error rate; Data analysis module: calculates the environmental warning assessment coefficient based on environmental data; determines whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold; if yes, sends the warning information to the user end; if no, continuously monitors and judges; wherein the preset environmental threshold includes: preset production environment threshold and preset test environment threshold; Bluetooth module test module: based on the signal quality parameters and the preset parameter thresholds, determine whether the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified; if yes, it is judged that the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified and can be packaged and shipped; if not, it is judged that the anti-electromagnetic interference ability of the Bluetooth module to be tested is unqualified; wherein, the preset parameters include: a preset amplitude change threshold and a preset bit error rate threshold.

[0007] Preferably, the data analysis module is in communication and / or electrically connected with the data acquisition module and the Bluetooth module testing module respectively.

[0008] Preferably, the real-time collection of environmental data of the target area includes: The environmental data of the target area is collected in real time through data sensors; wherein the data sensors include: temperature sensors and humidity sensors; the environmental data include: ambient temperature and ambient humidity; the target area refers to the production area of ​​the entire production process of the Bluetooth module and the test area during the test process.

[0009] Preferably, the step of obtaining the signal quality parameter of the Bluetooth module to be tested in a preset electromagnetic interference scenario includes: S1: Simulate several electromagnetic interference scenarios through signal transmitters; S2: Send a test signal to the Bluetooth module under test in the electromagnetic interference scenario through the Bluetooth tester; S3: The Bluetooth module to be tested processes the test signal after receiving it, and returns the response signal generated after the processing to the Bluetooth tester; wherein the processing includes: decoding, verification or data processing; S4: Record the signal strength of the response signal through a Bluetooth tester; S5: Obtain the bit error rate of the signal.

[0010] It should be noted that the several electromagnetic interference scenarios include: electrostatic discharge (ESD), electrical fast transient pulse group (EFT / B) and surge; the test signal is mainly used to simulate the data transmission situation in actual applications and evaluate the performance and reliability of the Bluetooth module, such as data mode, transmission rate and transmission distance and other parameters; the response signal is the feedback of the Bluetooth module to the test signal, including reception confirmation, data response, status information and error information.

[0011] Preferably, the bit error rate of the acquired signal includes: S1: Based on the Bluetooth tester, the Bluetooth module to be tested is controlled to work at a specific frequency point through the link management protocol (LMP) instruction; wherein the specific frequency points include: low frequency point, medium frequency point and high frequency point; S2: Controlling the output power of the Bluetooth tester so that the power at the receiver input of the Bluetooth module to be tested reaches a preset value; wherein the preset value is set by experience according to actual test requirements; S3: The Bluetooth detector sends a test signal to the Bluetooth module to be tested, and the Bluetooth module to be tested returns a response signal to the Bluetooth detector after processing; S4: Counting the number of error bits in the response signal through a Bluetooth tester; S5: The bit error rate of the response signal of the Bluetooth module to be tested is calculated by the formula: bit error rate = number of error bits / total number of bits.

[0012] It should be noted that the specific frequency point refers to the specific frequency point used for data transmission in Bluetooth communication. For example, Bluetooth operates in the 2.4GHz ISM (Industrial, Scientific and Medical) frequency band, and the specific frequency point is usually in the range of 2.402GHz to 2.480GHz. In the test, the Bluetooth tester will set the module to operate at low frequency points (such as 2402MHz), medium frequency points (such as 2441MHz) and high frequency points (such as 2480MHz) to evaluate the performance at different frequency points; the preset value refers to the signal strength in actual applications; The present invention controls the Bluetooth module to be tested to work at a specific frequency point, and controls the output power of a Bluetooth tester to make the power at the receiver entrance of the Bluetooth module to be tested reach a preset value, which is beneficial to evaluating the performance of the Bluetooth module under different signal strengths.

[0013] Preferably, the environmental early warning assessment coefficient is calculated based on the environmental data, including: The ambient temperature is marked as W and the ambient humidity is marked as H; The environmental early warning assessment coefficient is calculated by the formula: P=A×[ln(W+1)] / [1+ln(W+1)]+B×[e^He^(-H)] / [e^H+e^(-H)]; where A and B are proportional coefficients, P is the environmental early warning assessment coefficient, W>0, H>0, It is a logarithmic function with the natural number e as base.

[0014] Preferably, the determining whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold value includes: Determine whether the environmental warning assessment coefficient is greater than the preset production environment threshold; if yes, generate production environment warning information; if no, continue to detect and judge; wherein, the preset production environment threshold is set according to the actual Bluetooth module production requirements; Determine whether the environmental warning assessment coefficient is greater than the preset test environment threshold; if yes, generate test environment warning information; if not, continue to detect and judge; wherein, the preset test environment threshold is set according to the actual Bluetooth module test requirements.

[0015] The present invention collects environmental data of the target area in real time; calculates an environmental warning assessment coefficient based on the environmental data; and determines whether to send a warning message based on the environmental warning assessment coefficient and a preset environmental threshold, thereby solving the problem that the prior art does not take into account the impact of environmental factors on the production test of the Bluetooth module.

[0016] Preferably, judging whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the signal quality parameter and the preset parameter threshold includes: S1: Obtain a change in signal strength by subtracting the initial signal strength of the response signal of the Bluetooth module to be tested from the signal strength of the response signal of the Bluetooth module to be tested; S2: Determine whether the amplitude of the signal strength change is greater than a preset amplitude change threshold; if yes, the anti-electromagnetic interference capability of the Bluetooth module to be tested is determined to be qualified; if no, the anti-electromagnetic interference capability of the Bluetooth module to be tested is determined to be unqualified; wherein the preset amplitude change threshold is set according to the requirements of the anti-electromagnetic interference capability of the Bluetooth module actually produced; S3: judging whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the bit error rate of the response signal of the Bluetooth module to be tested and a preset bit error rate threshold.

[0017] It should be noted that the initial signal strength of the response signal of the Bluetooth module to be tested refers to the signal strength obtained by testing the Bluetooth module to be tested in an environment without electromagnetic interference.

[0018] Preferably, judging whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the bit error rate of the response signal of the Bluetooth module to be tested and a preset bit error rate threshold includes: Determine whether the bit error rate of the response signal of the Bluetooth module to be tested is greater than the preset bit error rate threshold; if yes, it is determined that the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified; if not, it is determined that the anti-electromagnetic interference ability of the Bluetooth module to be tested is unqualified; wherein, the preset bit error rate threshold is set according to the requirements of the anti-electromagnetic interference ability of the actual production Bluetooth module.

[0019] The present invention obtains the amplitude of signal strength change by subtracting the initial signal strength of the response signal of the Bluetooth module to be tested from the signal strength of the response signal of the Bluetooth module to be tested; judges whether the amplitude of signal strength change is greater than a preset amplitude change threshold; and judges whether the bit error rate of the response signal of the Bluetooth module to be tested is greater than a preset bit error rate threshold, thereby solving the problem that the prior art does not consider monitoring the anti-electromagnetic interference capability of the Bluetooth module, resulting in poor stability of the Bluetooth module.

[0020] A second aspect of the present invention provides a production test method for a Bluetooth module, comprising: Step 1: Collect environmental data of the target area in real time; Step 2: Obtain the signal quality parameters of the Bluetooth module to be tested in a preset electromagnetic interference scenario; Step 3: Calculate the environmental early warning assessment coefficient based on environmental data; Step 4: Determine whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold; if yes, send the warning information to the user end; if no, continue to monitor and judge; Step 5: Based on the signal quality parameters and the preset parameter threshold, determine whether the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified; if yes, it is determined that the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified and can be packaged and shipped; if not, it is determined that the anti-electromagnetic interference ability of the Bluetooth module to be tested is unqualified.

[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. The prior art does not take into account the impact of environmental factors on the production and testing of Bluetooth modules. Excessively high temperatures can cause the stability of electronic components in the Bluetooth module to deteriorate, and the processor and other digital circuits may operate unstably at high temperatures, resulting in slower signal processing speed or increased error rate; excessive humidity can cause water vapor in the air to condense on the circuit board inside the Bluetooth module, resulting in reduced insulation performance, increased risk of short circuits, and affecting the signal transmission quality and the overall performance of the module; the present invention collects environmental data of the target area in real time; calculates an environmental early warning assessment coefficient based on the environmental data, and determines whether to send an early warning message based on the environmental early warning assessment coefficient and a preset environmental threshold; if yes, sends the early warning message to the user end; if not, continues to monitor and judge, thereby solving the problem that the prior art does not take into account the impact of environmental factors on the production and testing of Bluetooth modules.

[0022] 2. The present invention simulates electromagnetic interference scenarios such as electrostatic discharge, electrical fast transient pulse groups and surges, and controls the output power and frequency of the Bluetooth tester to accurately measure and analyze the signal strength change and bit error rate of the Bluetooth module to be tested, so as to fully understand its data transmission capability, anti-interference capability and stability in practical applications; obtains the amplitude of signal strength change by subtracting the initial signal strength of the response signal of the Bluetooth module to be tested from the signal strength of the response signal of the Bluetooth module to be tested; determines whether the amplitude of signal strength change is greater than a preset amplitude change threshold; and determines whether the bit error rate of the response signal of the Bluetooth module to be tested is greater than a preset bit error rate threshold, thereby solving the problem that the prior art does not consider monitoring the anti-electromagnetic interference capability of the Bluetooth module, resulting in poor stability of the Bluetooth module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 or the description of the prior art 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.

[0024] Figure 1 A schematic diagram of a system module according to an embodiment of the present invention; Figure 2 A schematic diagram of a signal strength acquisition method according to an embodiment of the present invention; Figure 3 A schematic diagram of a method for obtaining a bit error rate according to an embodiment of the present invention; Figure 4 Schematic diagram of the method steps of an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The technical scheme of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0026] See also Figure 1 , a first aspect of the present invention provides a production test system for a Bluetooth module, including: a data acquisition module, a data analysis module and a Bluetooth module test module; Data acquisition module: used to collect environmental data of the target area in real time; and to obtain signal quality parameters of the Bluetooth module to be tested in a preset electromagnetic interference scenario; wherein the signal quality parameters include: signal strength and bit error rate; Collect environmental data of the target area in real time, including: The environmental data of the target area is collected in real time through data sensors; wherein the data sensors include: temperature sensors and humidity sensors; the environmental data include: ambient temperature and ambient humidity; the target area refers to the production area of ​​the entire production process of the Bluetooth module and the test area during the test process.

[0027] See also Figure 2 , obtain the signal quality parameters of the Bluetooth module under test in the preset electromagnetic interference scenario, including: S1: Simulate several electromagnetic interference scenarios through signal transmitters; S2: Send a test signal to the Bluetooth module under test in the electromagnetic interference scenario through the Bluetooth tester; S3: The Bluetooth module to be tested processes the test signal after receiving it, and returns the response signal generated after the processing to the Bluetooth tester; wherein the processing includes: decoding, verification or data processing; S4: Record the signal strength of the response signal through a Bluetooth tester; S5: Obtain the bit error rate of the signal.

[0028] See also Figure 3 , get the bit error rate of the signal, including: S1: Based on the Bluetooth tester, the Bluetooth module to be tested is controlled to work at a specific frequency point through the link management protocol (LMP) instruction; wherein the specific frequency points include: low frequency point, medium frequency point and high frequency point; S2: Controlling the output power of the Bluetooth tester so that the power at the receiver input of the Bluetooth module to be tested reaches a preset value; wherein the preset value is set by experience according to actual test requirements; S3: The Bluetooth detector sends a test signal to the Bluetooth module to be tested, and the Bluetooth module to be tested returns a response signal to the Bluetooth detector after processing; S4: Counting the number of error bits in the response signal through a Bluetooth tester; S5: The bit error rate of the response signal of the Bluetooth module to be tested is calculated by the formula: bit error rate = number of error bits / total number of bits.

[0029] For example, suppose a Bluetooth module manufacturer wants to evaluate the signal quality of its newly developed Bluetooth module under different electromagnetic interference scenarios to ensure the stability and reliability of the product in actual applications.

[0030] 1. Environmental data collection; Temperature sensors and humidity sensors are deployed in the production area and test area of ​​the Bluetooth module respectively.

[0031] The data acquisition module reads and records environmental data in real time through sensors, including ambient temperature and humidity.

[0032] The collected environmental data are stored in the database for subsequent analysis.

[0033] 2. Electromagnetic interference scenario simulation and signal quality testing; Step S1: simulating electromagnetic interference scenario; Use signal transmitters to simulate electromagnetic interference scenarios such as electrostatic discharge (ESD), electrical fast transient pulse group (EFT / B) and surge.

[0034] Each scenario simulates different interference strengths and frequencies to cover various situations that may be encountered in actual applications.

[0035] Step S2: sending a test signal; Place the Bluetooth module under test in a simulated electromagnetic interference scenario.

[0036] Use a Bluetooth tester to send a test signal to the Bluetooth module to be tested. The test signal simulates the data transmission conditions in actual applications, such as data mode, transmission rate, and transmission distance.

[0037] Step S3: receiving and processing a response signal; After receiving the test signal, the Bluetooth module to be tested performs operations such as decoding, verification or data processing.

[0038] The processed response signal is returned to the Bluetooth tester.

[0039] Step S4: Record signal strength; The Bluetooth tester records the signal strength of the received response signal.

[0040] The signal strength data are stored in a database for subsequent analysis.

[0041] Step S5: Obtaining bit error rate; Use a Bluetooth tester to control the Bluetooth module under test to operate at low frequency (2402MHz), medium frequency (2441MHz) and high frequency (2480MHz) through Link Management Protocol (LMP) instructions.

[0042] Adjust the output power of the Bluetooth tester so that the power at the receiver input of the Bluetooth module to be tested reaches the preset value (for example, -70dBm).

[0043] The Bluetooth tester sends a test signal at each frequency and counts the number of error bits in the response signal.

[0044] According to the formula "Bit error rate = number of error bits / total number of bits", calculate the bit error rate at each frequency point.

[0045] The bit error rate data is stored in the database for subsequent analysis.

[0046] 3. Result analysis; Perform statistical analysis on the collected environmental data and signal quality parameters to understand the performance of the Bluetooth module under different environmental conditions and electromagnetic interference scenarios.

[0047] Based on the analysis results, the Bluetooth module is optimized and improved to improve its stability and reliability in complex environments.

[0048] Through this embodiment, manufacturers can fully understand the performance of their Bluetooth modules in different environments and electromagnetic interference scenarios, providing strong support for product optimization and improvement. At the same time, this method can also provide useful reference and reference for other Bluetooth module manufacturers.

[0049] Data analysis module: calculates the environmental warning assessment coefficient based on environmental data; determines whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold; if yes, sends the warning information to the user end; if no, continuously monitors and judges; wherein the preset environmental threshold includes: preset production environment threshold and preset test environment threshold; The environmental early warning assessment coefficient is calculated based on environmental data, including: The ambient temperature is marked as W and the ambient humidity is marked as H; The environmental early warning assessment coefficient is calculated by the formula: P=A×[ln(W+1)] / [1+ln(W+1)]+B×[e^He^(-H)] / [e^H+e^(-H)]; where A and B are proportional coefficients, P is the environmental early warning assessment coefficient, W>0, H>0, and ln(*) is a logarithmic function with the natural number e as the base.

[0050] Determine whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold, including: Determine whether the environmental warning assessment coefficient is greater than the preset production environment threshold; if yes, generate production environment warning information; if no, continue to detect and judge; wherein, the preset production environment threshold is set according to the actual Bluetooth module production requirements; Determine whether the environmental warning assessment coefficient is greater than the preset test environment threshold; if yes, generate test environment warning information; if not, continue to detect and judge; wherein, the preset test environment threshold is set according to the actual Bluetooth module test requirements.

[0051] For example, suppose a Bluetooth module manufacturer finds that environmental factors (such as temperature and humidity) have a significant impact on the performance of Bluetooth modules during the production and testing of Bluetooth modules. In order to ensure the stability and reliability of Bluetooth modules during production and testing, the manufacturer decides to introduce a data analysis module that can collect environmental data in real time and calculate an environmental warning evaluation coefficient based on these data to determine whether it is necessary to send a warning message. The details are as follows: 1. Environmental data collection; Temperature sensors and humidity sensors are deployed in the production area and test area of ​​the Bluetooth module respectively.

[0052] The data acquisition module reads and records environmental data in real time through sensors, including ambient temperature (W) and ambient humidity (H).

[0053] 2. Calculate the environmental early warning assessment coefficient; Assume that the collected data is as follows: The real-time collected ambient temperature (W) is 25°C.

[0054] The ambient humidity (H) collected in real time is 50%RH (relative humidity).

[0055] Assume that the proportionality coefficients A=0.5 and B=0.3.

[0056] Substitute the real-time collected ambient temperature (W) and ambient humidity (H) into the formula P=A×[ln(W+1)] / [1+ln(W+1)]+B×[e^He^(-H)] / [e^H+e^(-H)], and we get: P=0.5×[ln(25+1)] / [1+ln(25+1)]+0.3×[e^50-e^(-50)] / [e^50+e^(-50)]≈0.68.

[0057] 3. Determine whether to send warning information; Assume that the preset production environment threshold P_threshold_production=0.7.

[0058] Assume that the preset test environment threshold P_threshold_testing=0.6.

[0059] Determine the production environment; Since P is less than P_threshold_production, continue monitoring and judging; If the calculated environmental warning assessment coefficient P is greater than the preset production environment threshold value P_threshold_production, production environment warning information is generated and sent to the user end (such as a production manager).

[0060] Determine the test environment; Set a preset test environment threshold (such as P_threshold_testing), which is set according to the actual requirements of the Bluetooth module test.

[0061] Since the environmental warning evaluation coefficient P is greater than the preset test environment threshold value P_threshold_testing, a test environment warning message is generated and sent to the user end, wherein the client end includes: a mobile phone or a computer.

[0062] If P is less than or equal to P_threshold_testing, continue monitoring and judging.

[0063] 4. Result processing; After receiving the warning information, the user end can take corresponding measures according to the warning content, such as adjusting the ambient temperature and humidity, or suspending the production and testing process.

[0064] The data analysis module continuously monitors environmental data and recalculates the environmental early warning assessment coefficient based on new data to ensure the accuracy and real-time nature of the early warning information.

[0065] Through this embodiment, it can be seen that the Bluetooth module manufacturer can understand the environmental conditions of the production area and the test area in real time, and take corresponding measures in time according to the environmental early warning assessment coefficient. This helps to improve the stability and reliability of the Bluetooth module during the production and testing process, reduce the defective product rate, and improve product quality. At the same time, this method also provides a useful reference and reference for other similar manufacturers.

[0066] Bluetooth module test module: based on the signal quality parameters and the preset parameter thresholds, determine whether the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified; if yes, the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified and can be packaged and shipped; if no, the anti-electromagnetic interference ability of the Bluetooth module to be tested is unqualified and needs to be reworked for optimization; among which, the preset parameters include: preset amplitude change threshold and preset bit error rate threshold.

[0067] Based on the signal quality parameters and the preset parameter thresholds, it is determined whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified, including: S1: Obtain a change in signal strength by subtracting the initial signal strength of the response signal of the Bluetooth module to be tested from the signal strength of the response signal of the Bluetooth module to be tested; S2: Determine whether the amplitude of the signal strength change is greater than a preset amplitude change threshold; if yes, the anti-electromagnetic interference capability of the Bluetooth module to be tested is determined to be qualified; if no, the anti-electromagnetic interference capability of the Bluetooth module to be tested is determined to be unqualified; wherein the preset amplitude change threshold is set according to the requirements of the anti-electromagnetic interference capability of the Bluetooth module actually produced; S3: judging whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the bit error rate of the response signal of the Bluetooth module to be tested and a preset bit error rate threshold.

[0068] Based on the bit error rate of the response signal of the Bluetooth module to be tested and the preset bit error rate threshold, it is judged whether the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified, including: Determine whether the bit error rate of the response signal of the Bluetooth module to be tested is greater than the preset bit error rate threshold; if yes, it is determined that the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified; if not, it is determined that the anti-electromagnetic interference ability of the Bluetooth module to be tested is unqualified; wherein, the preset bit error rate threshold is set according to the requirements of the anti-electromagnetic interference ability of the actual production Bluetooth module.

[0069] For example, suppose a Bluetooth module manufacturer needs to test the anti-electromagnetic interference capability of the Bluetooth module before leaving the factory to ensure the stability and reliability of the Bluetooth module in a complex electromagnetic environment. Based on actual needs, the following test process and standards are formulated.

[0070] 1. Preset parameters; Preset amplitude change threshold: set to XdB, indicating the maximum allowable change in the Bluetooth module signal strength under electromagnetic interference.

[0071] 2. Preset bit error rate threshold: set to Y%, which indicates the maximum allowable bit error rate of the Bluetooth module response signal under electromagnetic interference.

[0072] 3. Test process; S1: Get the initial signal strength; In an environment without electromagnetic interference, use professional signal testing equipment to test the signal strength of the Bluetooth module to be tested and record it as I.

[0073] S2: Apply electromagnetic interference and test; Place the Bluetooth module to be tested in an electromagnetic interference environment (such as an electromagnetic interference test box).

[0074] Use the same signal test equipment to test the signal strength of the Bluetooth module under electromagnetic interference and record it as TS.

[0075] S3: Calculate the signal strength variation; Calculate the signal strength change amplitude SS, the formula is: SS=|TS-I|.

[0076] S4: Determine the amplitude of signal strength change; If SS is greater than XdB, it is determined that the anti-electromagnetic interference capability of the Bluetooth module to be tested is unqualified; if SS is less than XdB, it is determined to be qualified and enters step S5.

[0077] S5: Test bit error rate; In an electromagnetic interference environment, a certain number of data packets are sent to the Bluetooth module to be tested and its response signal is received.

[0078] Calculate the bit error rate BER of the response signal.

[0079] S6: Determine the bit error rate; If the BER is less than Y%, the Bluetooth module under test is judged to have qualified anti-electromagnetic interference capability and can be packaged and shipped; otherwise, the Bluetooth module under test is judged to have unqualified anti-electromagnetic interference capability and needs to be reworked and optimized.

[0080] 4. Specific numerical examples; Assume the preset parameters: The preset amplitude change threshold is X=5dB; The preset bit error rate threshold Y=2%; Assume test data: Initial signal strength I=-50dBm; Test signal strength TS = -53dBm; Bit error rate BER = 1.5%; Calculation and judgment: Signal strength change range SS = |-53dBm-(-50dBm)| = 3dB; Because SS (3dB) is less than X (5dB), continue to test the bit error rate.

[0081] Since the bit error rate BER (1.5%) is less than Y (2%), it is determined that the anti-electromagnetic interference capability of the Bluetooth module under test is qualified and can be packaged and shipped.

[0082] Through the detailed test process and data of this embodiment, it is possible to accurately determine whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified, thereby ensuring the stability and reliability of the Bluetooth module in a complex electromagnetic environment.

[0083] See also Figure 4 The second aspect of the present invention provides a production test method for a Bluetooth module, comprising: Step 1: Collect environmental data of the target area in real time; Step 2: Obtain the signal quality parameters of the Bluetooth module to be tested in a preset electromagnetic interference scenario; Step 3: Calculate the environmental early warning assessment coefficient based on environmental data; Step 4: Determine whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold; if yes, send the warning information to the user end; if no, continue to monitor and judge; Step 5: Based on the signal quality parameters and the preset parameter thresholds, determine whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified; if yes, the anti-electromagnetic interference capability of the Bluetooth module to be tested is determined to be qualified and can be packaged and shipped; if no, the anti-electromagnetic interference capability of the Bluetooth module to be tested is determined to be unqualified and needs to be reworked for optimization.

[0084] Part of the data in the above formula is calculated by removing the dimension and taking its numerical value. The formula is a formula closest to the actual situation obtained by software simulation of a large amount of collected data; the preset parameters and preset thresholds in the formula are set by technical personnel in this field according to actual conditions or obtained through simulation of a large amount of data.

[0085] Working principle of the present invention: The present invention collects environmental data of the target area in real time; and obtains signal quality parameters of the Bluetooth module to be tested in a preset electromagnetic interference scenario; calculates an environmental warning evaluation coefficient based on the environmental data; determines whether to send a warning message based on the environmental warning evaluation coefficient and a preset environmental threshold; if yes, sends the warning message to the user end; if not, continuously monitors and determines; determines whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the signal quality parameters and the preset parameter threshold, thereby solving the problem that the prior art does not take into account the influence of environmental factors on the production test of the Bluetooth module, that excessively high temperature will cause the stability of electronic components in the Bluetooth module to deteriorate, and that the processor and other digital circuits may operate unstably at high temperatures, resulting in a slower signal processing speed or an increased error rate; that excessively high humidity will cause water vapor in the air to condense on the circuit board inside the Bluetooth module, resulting in a decrease in insulation performance, an increased risk of short circuits, and affecting the signal transmission quality and the overall performance of the module.

[0086] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A production test system for a Bluetooth module, characterized in that: include: Data acquisition module, data analysis module and Bluetooth module testing module; Data acquisition module: used to collect environmental data of the target area in real time; And, obtaining signal quality parameters of the Bluetooth module to be tested in a preset electromagnetic interference scenario; wherein the signal quality parameters include: signal strength and bit error rate; Data analysis module: calculates the environmental warning assessment coefficient based on environmental data; determines whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold; if yes, sends the warning information to the user end; if no, continuously monitors and judges; wherein the preset environmental threshold includes: preset production environment threshold and preset test environment threshold; Bluetooth module test module: based on the signal quality parameters and the preset parameter thresholds, determine whether the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified; if yes, it is judged that the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified and can be packaged and shipped; if not, it is judged that the anti-electromagnetic interference ability of the Bluetooth module to be tested is unqualified; wherein, the preset parameters include: a preset amplitude change threshold and a preset bit error rate threshold.

2. A production test system for a Bluetooth module according to claim 1, characterized in that: The data analysis module is communicated and / or electrically connected with the data acquisition module and the Bluetooth module testing module respectively.

3. A production test system for a Bluetooth module according to claim 1, characterized in that: The real-time collection of environmental data of the target area includes: The environmental data of the target area is collected in real time through data sensors; wherein the data sensors include: temperature sensors and humidity sensors; the environmental data include: ambient temperature and ambient humidity; the target area refers to the production area of ​​the entire production process of the Bluetooth module and the test area during the test process.

4. A production test system for a Bluetooth module according to claim 1, characterized in that: The obtaining of the signal quality parameter of the Bluetooth module to be tested in a preset electromagnetic interference scenario includes: S1: Simulate several electromagnetic interference scenarios through signal transmitters; S2: Send a test signal to the Bluetooth module under test in the electromagnetic interference scenario through the Bluetooth tester; S3: The Bluetooth module to be tested processes the test signal after receiving it, and returns the response signal generated after the processing to the Bluetooth tester; wherein the processing includes: decoding, verification or data processing; S4: Record the signal strength of the response signal through a Bluetooth tester; S5: Obtain the bit error rate of the signal.

5. A production test system for a Bluetooth module according to claim 4, characterized in that: The acquiring the bit error rate of the signal comprises: S1: Based on the Bluetooth tester, the Bluetooth module to be tested is controlled to work at a specific frequency point through the link management protocol instruction; wherein the specific frequency points include: low frequency point, medium frequency point and high frequency point; S2: Control the output power of the Bluetooth tester so that the power at the receiver input of the Bluetooth module to be tested reaches a preset value; S3: The Bluetooth detector sends a test signal to the Bluetooth module to be tested, and the Bluetooth module to be tested returns a response signal to the Bluetooth detector after processing; S4: Counting the number of error bits in the response signal through a Bluetooth tester; S5: The bit error rate of the response signal of the Bluetooth module to be tested is calculated by the formula: bit error rate = number of error bits / total number of bits.

6. A production test system for a Bluetooth module according to claim 1, characterized in that: The environmental early warning assessment coefficient is calculated based on environmental data, including: The ambient temperature is marked as W and the ambient humidity is marked as H; The environmental early warning assessment coefficient is calculated by the formula: P=A×[ln(W+1)] / [1+ln(W+1)]+B×[e^He^(-H)] / [e^H+e^(-H)]; where A and B are proportional coefficients, P is the environmental early warning assessment coefficient, W>0, H>0, and ln(*) is a logarithmic function with the natural number e as the base.

7. A production test system for a Bluetooth module according to claim 1, characterized in that: The determining whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold value includes: Determine whether the environmental warning assessment coefficient is greater than the preset production environment threshold; if yes, generate production environment warning information; if no, continue to detect and judge; wherein, the preset production environment threshold is set according to the actual Bluetooth module production requirements; Determine whether the environmental warning assessment coefficient is greater than the preset test environment threshold; if yes, generate test environment warning information; if not, continue to detect and judge; wherein, the preset test environment threshold is set according to the actual Bluetooth module test requirements.

8. A production test system for a Bluetooth module according to claim 1, characterized in that: The step of judging whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the signal quality parameter and the preset parameter threshold comprises: S1: Obtain a change in signal strength by subtracting the initial signal strength of the response signal of the Bluetooth module to be tested from the signal strength of the response signal of the Bluetooth module to be tested; S2: Determine whether the amplitude of the signal strength change is greater than a preset amplitude change threshold; if yes, the anti-electromagnetic interference capability of the Bluetooth module to be tested is determined to be qualified; if no, the anti-electromagnetic interference capability of the Bluetooth module to be tested is determined to be unqualified; wherein the preset amplitude change threshold is set according to the requirements of the anti-electromagnetic interference capability of the Bluetooth module actually produced; S3: judging whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the bit error rate of the response signal of the Bluetooth module to be tested and a preset bit error rate threshold.

9. A production test system for a Bluetooth module according to claim 8, characterized in that: The step of judging whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the bit error rate of the response signal of the Bluetooth module to be tested and a preset bit error rate threshold comprises: Determine whether the bit error rate of the response signal of the Bluetooth module to be tested is greater than the preset bit error rate threshold; if yes, it is determined that the anti-electromagnetic interference ability of the Bluetooth module to be tested is qualified; if not, it is determined that the anti-electromagnetic interference ability of the Bluetooth module to be tested is unqualified; wherein, the preset bit error rate threshold is set according to the requirements of the anti-electromagnetic interference ability of the actual production Bluetooth module.

10. A production test method for a Bluetooth module, applied to a production test system for a Bluetooth module according to any one of claims 1 to 9, characterized in that: include: Step 1: Collect environmental data of the target area in real time; Step 2: Obtain the signal quality parameters of the Bluetooth module to be tested in a preset electromagnetic interference scenario; Step 3: Calculate the environmental early warning assessment coefficient based on environmental data; Step 4: Determine whether to send warning information based on the environmental warning assessment coefficient and the preset environmental threshold; If yes, then send warning information to the user end; if no, then continue to monitor and judge; Step 5: Determine whether the anti-electromagnetic interference capability of the Bluetooth module to be tested is qualified based on the signal quality parameter and the preset parameter threshold; If yes, the Bluetooth module to be tested is judged to have qualified anti-electromagnetic interference capability and can be packaged and shipped; If not, it is judged that the anti-electromagnetic interference capability of the Bluetooth module to be tested is unqualified.

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