A plastic pallet finished product quality inspection system

Abstract

The present invention discloses a finished product quality inspection system for plastic pallets, in the field of plastic product inspection technology, a dynamic load test module increases the weight on a plastic pallet through an automatic loading device, and moves the plastic pallet for dynamic simulation, and analyzes whether there is an error in the dynamic load test after the test is completed, and when an error is found in the analysis, the dynamic load test is repeated on the plastic pallet, and a bending test module performs a bending test on the plastic pallet after the dynamic load test is completed, and analyzes whether there is an error in the bending test after the test is completed, and when an error is found in the analysis, the bending test is repeated. In the process of automatically inspecting the load and material properties of the plastic pallet, the inspection system analyzes whether the inspection error is within the qualified range and performs corresponding management, effectively ensuring the accuracy of the automatic inspection of the load and material properties of the plastic pallet and ensuring the stability of the use of the plastic pallet.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic product detection, and in particular to a finished product quality detection system for a plastic pallet. Background Art

[0002] Plastic pallets are a common logistics and transportation tool, widely used in various warehousing, transportation and handling operations. Their main function is to carry and protect goods, facilitate mechanized handling operations, and improve logistics efficiency. In order to ensure the safe use and reliable functions of plastic pallets, finished product quality inspection is particularly important.

[0003] For plastic pallets used in the logistics industry, the detection system usually needs to automatically detect the load and material properties of plastic pallets. However, in the actual detection process, there are multiple factors that affect the detection accuracy of the load and material properties of plastic pallets. The detection system fails to comprehensively analyze and identify the multiple factors that affect the detection accuracy during the detection process, which will lead to the following problems:

[0004] Since there is no comprehensive analysis and identification of the multiple factors that affect the detection accuracy during the detection process, the detection system cannot guarantee the accuracy of plastic pallet detection. If the error in the load or material performance detection of batch plastic pallets is too large, this will cause the plastic pallets to have poor stability or false alarms in the detection system during use. The stability of the use of plastic pallets cannot be guaranteed, which may cause damage to the goods transported by plastic pallets, thereby causing losses to the company.

[0005] Based on this, the present invention proposes a finished product quality inspection system for plastic pallets. During the process of automatic inspection of the load and material properties of plastic pallets, the inspection error is analyzed to see whether it is within the qualified range and corresponding management is performed, thereby effectively ensuring the accuracy of automatic inspection of the load and material properties of plastic pallets and ensuring the stability of the use of plastic pallets. Summary of the invention

[0006] The purpose of the present invention is to provide a plastic pallet finished product quality inspection system to solve the shortcomings of the background technology.

[0007] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a finished plastic pallet quality inspection system, including a dynamic load test module, a bending test module, and a strategy generation module;

[0008] Dynamic load test module: Increase the weight on the plastic pallet through the automatic loading device, and move the plastic pallet for dynamic simulation, monitor the dynamic deformation and stress distribution of the plastic pallet in real time, and analyze whether there is an error in the dynamic load test after the test is completed. If there is an error in the analysis, repeat the dynamic load test on the plastic pallet. When any dynamic load test is completed and there is no error in the analysis, output the dynamic load test result of the plastic pallet;

[0009] Bending test module: After the plastic pallet completes the dynamic load test, the plastic pallet is subjected to a bending test. The bending test is performed on the plastic pallet through a bending test machine and the bending strength and recovery data are recorded. After the test is completed, the bending test is analyzed to see if there is an error. If there is an error in the analysis, the bending test is repeated. When any bending test is completed and there is no error in the analysis, the bending test result of the plastic pallet is output;

[0010] Strategy generation module: After the plastic pallet inspection is completed, the dynamic load test and bending test analysis results of the plastic pallet are combined to determine whether the plastic pallet needs to be inspected again, and the judgment result is sent to the administrator.

[0011] Preferably, after the test is completed, the dynamic load test module obtains the data acquisition frequency floating index and the data filtering error during the dynamic load test of the plastic pallet, normalizes the data acquisition frequency floating index and the data filtering error, maps the value range of the data acquisition frequency floating index and the data filtering error to between [0,1], obtains the normalized value of the data acquisition frequency floating index and the normalized value of the data filtering error, sums the normalized value of the data acquisition frequency floating index and the normalized value of the data filtering error to obtain a first error coefficient, and analyzes whether there is an error in the dynamic load test based on the comparison result of the first error coefficient and the load error threshold.

[0012] Preferably, if the first error coefficient is greater than the load error threshold, the dynamic load test module analyzes that there is an error in the dynamic load test. When the analysis shows that there is an error, the dynamic load test on the plastic pallet is repeated. If any dynamic load test is completed and the first error coefficient is less than or equal to the load error threshold, the dynamic load test is analyzed to have no error, and the dynamic load test module outputs the dynamic load test result of the plastic pallet.

[0013] Preferably, after the bending test module is tested, it obtains the load timing index and clamping floating index of the plastic pallet during the bending test, normalizes the load timing index and the clamping floating index, maps the value ranges of the load timing index and the clamping floating index to [0,1], obtains the normalized value of the load timing index and the normalized value of the clamping floating index, sums the normalized value of the load timing index and the normalized value of the clamping floating index to obtain the second error coefficient, and judges whether there is an error in the bending test based on the comparison result of the second error coefficient and the bending error threshold. If the second error coefficient is greater than the bending error threshold, it is judged that there is an error in the bending test, and the bending test is repeated. When any bending test is completed and the second error coefficient is less than or equal to the bending error threshold, it is analyzed that there is no error, and the bending test result of the plastic pallet is output.

[0014] Preferably, after the plastic pallet detection is completed, the strategy generation module obtains the most recent first error coefficient and second error coefficient of the plastic pallet, and performs weighted calculation on the first error coefficient and the second error coefficient to obtain an overall error value, which is expressed as:

[0015]

[0016] In the formula, Assign a value to the overall error, is the most recent first error coefficient of the plastic pallet. The second error coefficient of the most recent plastic pallet. are the weights of the most recent first error coefficient of the plastic pallet and the most recent second error coefficient of the plastic pallet, respectively, and ;

[0017] If the overall error assignment is less than or equal to the assignment threshold, the strategy generation module determines that the plastic pallet does not need to be tested again. If the overall error assignment is greater than the assignment threshold, the strategy generation module determines that the plastic pallet needs to be tested again.

[0018] Preferably, the calculation expression of the data filtering error is:

[0019]

[0020] In the formula, is the data filtering error, Represents the original data, Represents the data after filtering. Indicates the total test time, that is, the time period for signal acquisition. is a time variable, indicating the moment when the signal is collected.

[0021] Preferably, the calculation expression of the data acquisition frequency floating index is:

[0022]

[0023] In the formula, is the floating index of data collection frequency, Indicates the number of data collection times. Indicates Sub-sampling value, Indicates the average sample value.

[0024] A method for testing the quality of a finished plastic pallet, the method comprising the following steps:

[0025] The conveying equipment conveys the plastic pallet to be tested to the starting position of the detection system. After the detection system analyzes and locates the position of the plastic pallet, the plastic pallet is transferred to the test area for a dynamic load test. The weight on the plastic pallet is increased by an automatic loading device, and the plastic pallet is moved for dynamic simulation. The dynamic deformation and stress distribution of the plastic pallet are monitored in real time. After the test is completed, the dynamic load test is analyzed to see if there is an error. If there is an error in the analysis, the dynamic load test is repeated on the plastic pallet. When any dynamic load test is completed and the analysis shows that there is no error, the dynamic load test result of the plastic pallet is output.

[0026] After the plastic pallet completes the dynamic load test, a bending test is performed on the plastic pallet. The bending test is performed on the plastic pallet using a bending tester and the bending strength and recovery data are recorded. After the test is completed, it is analyzed whether there is an error in the bending test. When the analysis shows that there is an error, the bending test is repeated. When any bending test is completed and the analysis shows that there is no error, the bending test results of the plastic pallet are output. After the plastic pallet inspection is completed, combined with the dynamic load test and bending test analysis results of the plastic pallet, it is determined whether the plastic pallet needs to be inspected again, and a corresponding management strategy is generated based on the judgment result.

[0027] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0028] 1. The present invention increases the weight on the plastic pallet through an automatic loading device, and moves the plastic pallet for dynamic simulation, monitors the dynamic deformation and stress distribution of the plastic pallet in real time, and analyzes whether there is an error in the dynamic load test after the test is completed. When the analysis shows that there is an error, the dynamic load test is repeated on the plastic pallet. When any dynamic load test is completed and the analysis shows that there is no error, the dynamic load test result of the plastic pallet is output. The bending test module performs a bending test on the plastic pallet after the dynamic load test is completed. The bending test is performed on the plastic pallet by a bending tester and the bending strength and recovery data are recorded. After the test is completed, it is analyzed whether there is an error in the bending test. When the analysis shows that there is an error, the bending test is repeated. When any bending test is completed and the analysis shows that there is no error, the bending test result of the plastic pallet is output. In the process of automatic detection of the load and material properties of the plastic pallet, the detection system analyzes whether the detection error is within the qualified range and performs corresponding management, effectively ensuring the accuracy of the automatic detection of the load and material properties of the plastic pallet and ensuring the stability of the use of the plastic pallet;

[0029] 2. After the plastic pallet inspection is completed, the strategy generation module of the present invention combines the dynamic load test and bending test analysis results of the plastic pallet to determine whether the plastic pallet needs to be inspected again, and the judgment result is sent to the administrator. The detection system combines the dynamic load test and bending test analysis results to determine the detection accuracy of the plastic pallet, thereby further improving the detection accuracy of the plastic pallet. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a system module diagram of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figure 1As shown, a plastic pallet finished product quality inspection system described in this embodiment includes a dynamic load test module, a bending test module, and a strategy generation module;

[0034] Dynamic load test module: Increase the weight on the plastic pallet through the automatic loading device, move the plastic pallet for dynamic simulation, monitor the dynamic deformation and stress distribution of the plastic pallet in real time, analyze whether there is an error in the dynamic load test after the test is completed, and repeat the dynamic load test on the plastic pallet when there is an error in the analysis. When any dynamic load test is completed and there is no error in the analysis, output the dynamic load test result of the plastic pallet, send the dynamic load test result to the administrator, and send the dynamic load test analysis result to the strategy generation module;

[0035] Bending test module: After the plastic pallet completes the dynamic load test, the plastic pallet is subjected to a bending test. The bending test is performed on the plastic pallet through a bending test machine and the bending strength and recovery data are recorded. After the test is completed, the bending test is analyzed to see if there is an error. If there is an error in the analysis, the bending test is repeated. When any bending test is completed and there is no error in the analysis, the bending test result of the plastic pallet is output and sent to the administrator. The bending test analysis result is sent to the strategy generation module;

[0036] Strategy generation module: After the plastic pallet inspection is completed, the dynamic load test and bending test analysis results of the plastic pallet are combined to determine whether the plastic pallet needs to be inspected again, and the judgment result is sent to the administrator.

[0037] This application uses a dynamic load test module: the weight on the plastic pallet is increased by an automatic loading device, and the plastic pallet is moved for dynamic simulation, the dynamic deformation and stress distribution of the plastic pallet are monitored in real time, and the dynamic load test is analyzed after the test is completed. If there is an error in the analysis, the dynamic load test is repeated on the plastic pallet. When any dynamic load test is completed and the analysis does not have an error, the dynamic load test result of the plastic pallet is output. After the dynamic load test of the plastic pallet is completed, the bending test module performs a bending test on the plastic pallet, and the bending test is performed on the plastic pallet by a bending test machine and the bending strength and recovery data are recorded. After the test is completed, the bending test is analyzed if there is an error. If there is an error in the analysis, the bending test is repeated. When any bending test is completed and the analysis does not have an error, the bending test result of the plastic pallet is output. In the process of automatic detection of the load and material properties of the plastic pallet, the detection system analyzes whether the detection error is within the qualified range and performs corresponding management, effectively ensuring the accuracy of the automatic detection of the load and material properties of the plastic pallet and ensuring the stability of the use of the plastic pallet.

[0038] After the plastic pallet inspection is completed, the strategy generation module of the present application combines the dynamic load test and bending test analysis results of the plastic pallet to determine whether the plastic pallet needs to be inspected again, and the judgment result is sent to the administrator. The detection system combines the dynamic load test and bending test analysis results to determine the detection accuracy of the plastic pallet, thereby further improving the detection accuracy of the plastic pallet.

[0039] The workflow of the detection system is as follows:

[0040] The conveying equipment conveys the plastic pallet to be inspected to the starting position of the inspection system. After the inspection system analyzes and locates the position of the plastic pallet, it transfers the plastic pallet to the test area for a dynamic load test. The weight on the plastic pallet is increased by an automatic loading device, and the plastic pallet is moved for dynamic simulation. The dynamic deformation and stress distribution of the plastic pallet are monitored in real time. After the test is completed, it is analyzed whether there is an error in the dynamic load test. When the analysis shows that there is an error, the dynamic load test is repeated on the plastic pallet. When any dynamic load test is completed and there is no error in the analysis, the dynamic load test result of the plastic pallet is output. After the dynamic load test of the plastic pallet is completed, a bending test is performed on the plastic pallet. The bending test is performed on the plastic pallet by a bending testing machine and the bending strength and recovery data are recorded. After the test is completed, it is analyzed whether there is an error in the bending test. When the analysis shows that there is an error, the bending test is repeated. When any bending test is completed and there is no error in the analysis, the bending test result of the plastic pallet is output. After the plastic pallet inspection is completed, combined with the dynamic load test of the plastic pallet and the bending test analysis results, it is determined whether the plastic pallet needs to be inspected again, and a corresponding management strategy is generated based on the judgment result.

[0041] The dynamic load test module increases the weight on the plastic pallet through an automatic loading device, and moves the plastic pallet for dynamic simulation, monitoring the dynamic deformation and stress distribution of the plastic pallet in real time;

[0042] Gradually increase the weight on the pallet through an automatic loading device (such as an electric servo or hydraulic system) to ensure that the loading process is uniform and smooth. Monitor the weight change during the loading process in real time to ensure that the loading accuracy meets the preset standards. Start the dynamic simulation platform and simulate the movement and vibration of the pallet in actual use through an electric or hydraulic drive system. The dynamic simulation platform performs dynamic simulation according to the set motion parameters to simulate the load movement, emergency stop, turning and other working conditions in actual operation. Use strain gauges or displacement sensors to monitor the dynamic deformation of the pallet in real time and record the deformation data under different loads and motion states. Use stress sensors installed at key positions of the pallet to collect the stress distribution data of the pallet under dynamic load in real time. The deformation and stress data collected in real time are stored in the database of the detection system. Use data analysis software to process and analyze the real-time monitoring data to evaluate the performance of the pallet under dynamic load, including:

[0043] 1) Stress-strain analysis: Draw stress-strain curves to analyze the mechanical properties of the pallet under dynamic load.

[0044] 2) Displacement-time analysis: Draw the displacement-time curve to analyze the deformation behavior of the pallet under dynamic load.

[0045] 3) Spectral analysis: Perform spectral analysis on the displacement and stress data to identify the main frequency components of the pallet during vibration.

[0046] For example:

[0047] 1) Stress-strain analysis results: The stress-strain curve shows that the pallet begins to yield at 20MPa, the maximum stress is 35MPa, and the fracture strain is 5%. These data show that the pallet has good elastic and plastic deformation capabilities.

[0048] 2) Displacement-time analysis results: The displacement-time curve shows that the maximum displacement of the pallet during loading is 2 mm, indicating that the pallet has good stiffness and stability under dynamic load.

[0049] 3) Spectrum analysis results: Spectrum analysis shows that the main vibration frequencies of the pallet are 5 Hz and 15 Hz, indicating that the pallet may resonate at these frequencies and vibrations in these frequency ranges need to be avoided in actual use.

[0050] Embodiment 2: The dynamic load test module analyzes whether there is an error in the dynamic load test after the test is completed;

[0051] After the dynamic load test module is completed, the data acquisition frequency floating index and data filtering error in the dynamic load test of the plastic pallet are obtained, the data acquisition frequency floating index and the data filtering error are normalized, the value range of the data acquisition frequency floating index and the data filtering error is mapped to [0,1], the normalized value of the data acquisition frequency floating index and the normalized value of the data filtering error are obtained, the normalized value of the data acquisition frequency floating index and the normalized value of the data filtering error are summed to obtain a first error coefficient, and based on the comparison result of the first error coefficient and the load error threshold, whether there is an error in the dynamic load test is analyzed;

[0052] The calculation expression of data acquisition frequency floating index is:

[0053]

[0054] In the formula, is the floating index of data collection frequency, Indicates the number of data collection times. Indicates Sub-sampling value, Indicates the average sampling value. The data acquisition frequency fluctuation index is too large, indicating that the sampling frequency of the sensor equipment fluctuates greatly, which will affect the dynamic load test results. Specifically:

[0055] 1) Reduced data accuracy:

[0056] When the sampling frequency fluctuates greatly, at certain moments the sampling frequency may be too low to capture all the details of the signal, resulting in information loss; at other moments the sampling frequency may be too high, introducing unnecessary details and noise.

[0057] Specific performance:

[0058] Undersampling: When the instantaneous sampling frequency is lower than the Nyquist frequency of the signal, it will cause information loss and signal distortion, and cannot accurately reflect load changes.

[0059] Oversampling: When the instantaneous sampling frequency is higher than the actual need, high-frequency noise will be introduced, causing the data to contain too much useless information.

[0060] 2) Data consistency is affected:

[0061] Data inconsistency caused by sampling frequency fluctuations will make it difficult to analyze and compare test data from different time periods, thus affecting the reliability of test results.

[0062] Specific performance:

[0063] Inconsistent time base: The sampling frequencies in different time periods are different, resulting in uneven distribution of data points on the time axis, making it difficult to perform accurate timing analysis.

[0064] Data synchronization problem: In a multi-sensor system, if the sampling frequency fluctuations of each sensor are not synchronized, it will cause confusion in the timing relationship between the data, affecting the comprehensive analysis.

[0065] 3) Increased noise interference:

[0066] When the sampling frequency fluctuates greatly, a sampling frequency that is too high at certain moments will introduce noise, causing the high-frequency components (usually noise) in the signal to be recorded excessively, affecting the purity of the signal.

[0067] Specific performance:

[0068] Noise enhancement: Too high a sampling frequency introduces high-frequency noise, which interferes with the effective signal and increases the difficulty of signal processing.

[0069] Reduced signal-to-noise ratio: As the noise component increases, the signal-to-noise ratio decreases, affecting the signal quality and analysis results.

[0070] 4) Signal reconstruction error

[0071] Fluctuations in the sampling frequency will affect the reconstruction of the original signal, especially when the high-frequency components of the signal are undersampled or oversampled, and the reconstructed signal deviates from the actual signal.

[0072] Specific performance:

[0073] Reconstruction distortion: Due to the instability of the sampling frequency, distortion will occur when reconstructing the signal, and the original load signal cannot be accurately restored.

[0074] Spectral distortion: During frequency analysis, due to fluctuations in the sampling frequency, unreal frequency components may appear in the spectrum or the frequency components may be incorrectly reconstructed.

[0075] The calculation expression of data filtering error is:

[0076]

[0077] In the formula, is the data filtering error, Represents the original data, Represents the data after filtering. Indicates the total test time, that is, the time period for signal acquisition. is a time variable, indicating the moment when the signal is collected.

[0078] Filter error: quantifies the difference between the signal before and after filtering. It represents the average absolute error per unit time during the entire sampling period. The smaller the value, the better the filtering effect, that is, the closer the filtered signal is to the original signal.

[0079] Total test time: It is the time range for integral calculation, which means the time period from the start to the end of signal acquisition. It is used to standardize the error so that the error value is independent of time, which is convenient for comparing the filtering effects of different time periods.

[0080] Original signal: It is the signal data without filtering in the dynamic load test. It reflects the actual load changes of the pallet during the test.

[0081] Filtered signal: The signal obtained after filtering the original signal. Filtering is to remove noise and unnecessary high-frequency components to make the signal smoother and more reliable.

[0082] Time variable: represents the specific moment of signal acquisition. In the integral calculation, it is processed point by point, the absolute error between the original signal and the filtered signal at each moment is calculated, and these errors are accumulated and averaged over the entire time period.

[0083] The significance of integral calculation:

[0084] The integral calculation can smooth out the fluctuation of instantaneous error by accumulating the error in the entire time period and obtain the overall average error. This method can more comprehensively reflect the filtering effect, rather than relying solely on the error at certain specific moments.

[0085] The larger the filtering error, the greater the difference between the filtered signal and the original signal in the dynamic load test, which will affect the dynamic load test results, specifically:

[0086] 1) Signal distortion:

[0087] When the filtering error is large, the filtering process may cause certain features of the signal to be over-smoothed or lost, thereby causing signal distortion.

[0088] Specific performance:

[0089] Inaccurate load variation: Important load variation features in the original signal may be smoothed out, resulting in the inability to accurately reflect the true values ​​of the dynamic load peaks and troughs.

[0090] Frequency component loss: Some frequency components in the signal may be mistakenly removed by the filter, which cannot accurately reflect the periodic changes of the dynamic load.

[0091] 2) Response time delay:

[0092] The use of filters may introduce phase delays, especially when using low-pass filters. This delay will cause a delay in the signal response time and affect the results of real-time dynamic load testing.

[0093] Specific performance:

[0094] Measurement deviation caused by delay: Due to the delay introduced by the filter, the response time of the signal lags, resulting in a time difference between the actual load change and the measured load change.

[0095] Dynamic response distortion: For rapidly changing load signals, the delay introduced by the filter may make the measured signal unable to reflect the actual load changes in a timely manner, affecting the dynamic performance analysis.

[0096] 3) Improper noise handling:

[0097] Large filtering errors may indicate that the filter failed to effectively remove noise or over-smoothed the signal, resulting in residual noise components or information loss in the test results.

[0098] Specific performance:

[0099] Residual noise: The filter fails to effectively remove high-frequency noise, so that the filtered signal still contains noise components, affecting the purity of the signal.

[0100] Information loss: The filter over-smoothes the signal, causing some useful information in the original signal to be mistakenly filtered out, affecting the integrity of the signal.

[0101] 4) Reduced accuracy and reliability:

[0102] Large filtering errors will directly affect the accuracy and reliability of dynamic load test results, causing the measurement results to deviate from the actual situation.

[0103] Specific performance:

[0104] Reduced measurement accuracy: The filtered signal is significantly different from the original signal, and the measured value cannot accurately reflect the actual load, resulting in reduced measurement accuracy.

[0105] Reduced reliability of results: Due to the distortion and delay caused by filtering, the reliability and repeatability of the test results are affected, making it difficult to ensure the stability of the test results.

[0106] 5) Increased complexity of data analysis:

[0107] Large filtering errors will increase the complexity of subsequent data analysis, making the interpretation and application of test results more difficult.

[0108] Specific performance:

[0109] Increased data processing burden: The filtered data needs to be further processed to compensate for errors and distortions, which increases the workload and complexity of data processing.

[0110] Uncertainty of analysis results: Due to the uncertainty caused by filtering errors, the interpretation of analysis results may require more assumptions and verifications, increasing the difficulty of analysis.

[0111] When there is an error in the analysis, the dynamic load test module repeats the dynamic load test on the plastic pallet. When any dynamic load test is completed and there is no error in the analysis, the dynamic load test module outputs the dynamic load test result of the plastic pallet;

[0112] If the first error coefficient is greater than the load error threshold, the dynamic load test module analyzes that there is an error in the dynamic load test. When the analysis shows that there is an error, the dynamic load test on the plastic pallet is repeated. If any dynamic load test is completed and the first error coefficient is less than or equal to the load error threshold, it is analyzed that there is no error in the dynamic load test, and the dynamic load test module outputs the dynamic load test result of the plastic pallet.

[0113] The bending test module performs a bending test on the plastic pallet after the dynamic load test is completed. The bending test machine performs a bending test on the plastic pallet and records the bending strength and recovery data.

[0114] The bending tester starts to apply load to the plastic pallet according to the preset load range and loading rate. The relationship curve between load and displacement is recorded in real time. The load and displacement data are usually recorded by sensors and transmitted to a computer or data acquisition system for processing and analysis. During the test, the changes in load and displacement, as well as the deformation of the pallet, are closely monitored to ensure that the test process proceeds smoothly.

[0115] The load, displacement (or deformation) and other data during the bending test are recorded and usually saved in the form of a time series. The recorded data is used to calculate the bending strength, stiffness, recovery and other related parameters of the plastic pallet, such as bending modulus, maximum load capacity, etc. The test data is analyzed to evaluate whether the bending performance of the plastic pallet meets the design requirements or standard regulations, such as comparing the measured strength with the strength value required by the design.

[0116] Based on the test data and analysis results, evaluate whether the bending performance of the plastic pallet meets the expected requirements. If the bending performance meets the design requirements, it can be determined that the pallet has good performance under bending conditions;

[0117] In this application, each plastic pallet needs to be subjected to a bending test. Therefore, the bending test of each plastic pallet is the actual load of the application scenario, rather than the load that will cause damage to the plastic pallet.

[0118] Embodiment 3: The bending test module analyzes whether there is an error in the bending test after the test is completed;

[0119] After the bending test module is completed, the load timing index and clamping floating index of the plastic pallet during the bending test are obtained, and the load timing index and the clamping floating index are normalized so that the value ranges of the load timing index and the clamping floating index are mapped to [0,1], and the normalized value of the load timing index and the normalized value of the clamping floating index are obtained. The normalized value of the load timing index and the normalized value of the clamping floating index are summed to obtain the second error coefficient. Based on the comparison result of the second error coefficient and the bending error threshold, it is judged whether there is an error in the bending test. If the second error coefficient is greater than the bending error threshold, it is judged that there is an error in the bending test, and the bending test is repeated. When any bending test is completed and the second error coefficient is less than or equal to the bending error threshold, it is analyzed that there is no error, and the bending test result of the plastic pallet is output;

[0120] The calculation expression of load time series index is:

[0121]

[0122] In the formula, is the load time series index, is the number of test points, For the The load value of the data point, is the maximum load value among all data points. The larger the load time series index is, the greater the impact of sample quality differences on the test results is, specifically:

[0123] Load differences caused by sample mass differences: The mass differences between different samples may result in different loads during the test. Some samples may be stronger than others and be able to withstand greater loads, while others may not be strong enough and withstand less load under the same conditions.

[0124] Calculation of time series analysis: Time series analysis calculates the difference between the load value of each data point and the average load value of all data points. If the mass difference between samples is large, the difference between the load values ​​of each data point will also be large, resulting in an increase in the load time series index. Impact Assessment:

[0125] When the load time series index is large, it means that the mass difference between samples has a greater impact on the test results. This means that there are large differences in the load values ​​of different samples in the test, which may lead to inaccurate test results.

[0126] The calculation expression of the clamping floating index is:

[0127]

[0128] In the formula, To clamp the floating index, is the range of the pallet clamping area in the test, Load with position The function of It is the average value of all load data. The larger the clamping floating index is, the more uneven the clamping force on the pallet is, which leads to greater test error. Specifically:

[0129] Uneven load distribution: Uneven clamping force will cause uneven load distribution on the pallet. Some areas may bear greater or less load than other areas. This uneven load distribution will affect the deformation and stress distribution of the pallet, resulting in deviations in the test results.

[0130] Stress concentration: Uneven clamping force will cause uneven stress distribution on the pallet, which may lead to stress concentration. In the area of ​​stress concentration, the pallet may be more likely to deform or break, thus affecting the accuracy of the test results.

[0131] Deformation differences in different areas: Due to uneven clamping force, different areas bear different loads, so during the test, the deformation differences in different areas will increase. These deformation differences may cause inconsistencies in the test data, thus affecting the reliability of the test results.

[0132] Uncertainty in test results: Uneven clamping force will increase the uncertainty in the test process. Due to the uneven distribution of load, the test data may be affected by external factors such as friction, material deformation, etc., which will increase the error of the test results.

[0133] After the plastic pallet inspection is completed, the strategy generation module combines the dynamic load test and bending test analysis results of the plastic pallet to determine whether the plastic pallet needs to be inspected again, and sends the judgment result to the administrator;

[0134] After the plastic pallet is inspected, the strategy generation module obtains the most recent first error coefficient and second error coefficient of the plastic pallet (according to the above embodiment, the plastic pallet may generate multiple first error coefficients or second error coefficients), and performs weighted calculation on the first error coefficient and the second error coefficient to obtain the overall error assignment, which is expressed as follows:

[0135]

[0136] In the formula, Assign a value to the overall error, is the most recent first error coefficient of the plastic pallet. The second error coefficient of the most recent plastic pallet. are the weights of the most recent first error coefficient of the plastic pallet and the most recent second error coefficient of the plastic pallet, respectively, and ;

[0137] If the overall error assignment is less than or equal to the assignment threshold, the strategy generation module determines that the plastic pallet does not need to be tested again. If the overall error assignment is greater than the assignment threshold, the strategy generation module determines that the plastic pallet needs to be tested again.

[0138] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0139] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0140] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A plastic pallet finished product quality inspection system, characterized by: Including dynamic load test module, bending test module, strategy generation module; Dynamic load test module: Increase the weight on the plastic pallet through the automatic loading device, and move the plastic pallet for dynamic simulation, monitor the dynamic deformation and stress distribution of the plastic pallet in real time, and analyze whether there is an error in the dynamic load test after the test is completed. If there is an error in the analysis, repeat the dynamic load test on the plastic pallet. When any dynamic load test is completed and there is no error in the analysis, output the dynamic load test result of the plastic pallet; Bending test module: After the plastic pallet completes the dynamic load test, the plastic pallet is subjected to a bending test. The bending test is performed on the plastic pallet through a bending test machine and the bending strength and recovery data are recorded. After the test is completed, the bending test is analyzed to see if there is an error. If there is an error in the analysis, the bending test is repeated. When any bending test is completed and there is no error in the analysis, the bending test result of the plastic pallet is output; Strategy generation module: After the plastic pallet inspection is completed, the dynamic load test and bending test analysis results of the plastic pallet are combined to determine whether the plastic pallet needs to be inspected again, and the judgment result is sent to the administrator; The dynamic load test module obtains a first error coefficient by summing the normalized value of the data acquisition frequency floating index and the normalized value of the data filtering error, and analyzes whether there is an error in the dynamic load test based on the comparison result of the first error coefficient and the load error threshold; The bending test module sums the normalized value of the load time series index and the normalized value of the clamping floating index to obtain a second error coefficient, and determines whether there is an error in the bending test based on a comparison result between the second error coefficient and the bending error threshold; The strategy generation module performs weighted calculation on the first error coefficient and the second error coefficient to obtain an overall error value.

2. A plastic pallet finished product quality inspection system according to claim 1, characterized in that: After the dynamic load test module is completed, it obtains the data acquisition frequency floating index and the data filtering error during the dynamic load test of the plastic pallet, normalizes the data acquisition frequency floating index and the data filtering error, maps the value range of the data acquisition frequency floating index and the data filtering error to between [0,1], obtains the normalized value of the data acquisition frequency floating index and the normalized value of the data filtering error, sums the normalized value of the data acquisition frequency floating index and the normalized value of the data filtering error to obtain a first error coefficient, and analyzes whether there is an error in the dynamic load test based on the comparison result of the first error coefficient and the load error threshold.

3. A plastic pallet finished product quality inspection system according to claim 2, characterized in that: If the first error coefficient is greater than the load error threshold, the dynamic load test module analyzes that there is an error in the dynamic load test. When the analysis shows that there is an error, the dynamic load test on the plastic pallet is repeated. If any dynamic load test is completed and the first error coefficient is less than or equal to the load error threshold, it is analyzed that there is no error in the dynamic load test, and the dynamic load test module outputs the dynamic load test result of the plastic pallet.

4. A plastic pallet finished product quality inspection system according to claim 3, characterized in that: After the bending test module is completed, the load timing index and clamping floating index of the plastic pallet during the bending test are obtained, and the load timing index and the clamping floating index are normalized so that the value ranges of the load timing index and the clamping floating index are mapped to [0,1], and the normalized value of the load timing index and the normalized value of the clamping floating index are obtained. The normalized value of the load timing index and the normalized value of the clamping floating index are summed to obtain the second error coefficient. Based on the comparison result of the second error coefficient and the bending error threshold, it is judged whether there is an error in the bending test. If the second error coefficient is greater than the bending error threshold, it is judged that there is an error in the bending test, and the bending test is repeated. When any bending test is completed and the second error coefficient is less than or equal to the bending error threshold, it is analyzed that there is no error, and the bending test result of the plastic pallet is output.

5. A finished plastic pallet quality inspection system according to claim 4, characterized in that: After the plastic pallet is detected, the strategy generation module obtains the most recent first error coefficient and second error coefficient of the plastic pallet, and performs weighted calculation on the first error coefficient and the second error coefficient to obtain an overall error value, which is expressed as follows: In the formula, Assign a value to the overall error, is the most recent first error coefficient of the plastic pallet. The second error coefficient of the most recent plastic pallet. are the weights of the most recent first error coefficient of the plastic pallet and the most recent second error coefficient of the plastic pallet, respectively, and ; If the overall error assignment is less than or equal to the assignment threshold, the strategy generation module determines that the plastic pallet does not need to be tested again. If the overall error assignment is greater than the assignment threshold, the strategy generation module determines that the plastic pallet needs to be tested again.

6. A plastic pallet finished product quality inspection system according to claim 2, characterized in that: The calculation expression of the data filtering error is: In the formula, is the data filtering error, Represents the original data, Represents the data after filtering. Indicates the total test time, that is, the time period for signal acquisition. is a time variable, indicating the time when the signal is collected.

7. A plastic pallet finished product quality inspection system according to claim 2, characterized in that: The calculation expression of the data acquisition frequency floating index is: In the formula, is the floating index of data collection frequency, Indicates the number of data collection times. Indicates Sub-sampling value, Indicates the average sample value.

8. A method for testing the quality of finished plastic pallets, implemented by the testing system according to any one of claims 1 to 7, characterized in that: The detection method comprises the following steps: The conveying equipment conveys the plastic pallet to be tested to the starting position of the detection system. After the detection system analyzes and locates the position of the plastic pallet, the plastic pallet is transferred to the test area for a dynamic load test. The weight on the plastic pallet is increased by an automatic loading device, and the plastic pallet is moved for dynamic simulation. The dynamic deformation and stress distribution of the plastic pallet are monitored in real time. After the test is completed, the dynamic load test is analyzed to see if there is an error. If there is an error in the analysis, the dynamic load test is repeated on the plastic pallet. When any dynamic load test is completed and the analysis shows that there is no error, the dynamic load test result of the plastic pallet is output. After the plastic pallet completes the dynamic load test, a bending test is performed on the plastic pallet. The bending test is performed on the plastic pallet using a bending tester and the bending strength and recovery data are recorded. After the test is completed, it is analyzed whether there is an error in the bending test. When the analysis shows that there is an error, the bending test is repeated. When any bending test is completed and the analysis shows that there is no error, the bending test results of the plastic pallet are output. After the plastic pallet inspection is completed, combined with the dynamic load test and bending test analysis results of the plastic pallet, it is determined whether the plastic pallet needs to be inspected again, and a corresponding management strategy is generated based on the judgment result.

Images