CN118244186B - Method and system for testing high current of igniter - Google Patents
Method and system for testing high current of igniter Download PDFInfo
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- G—PHYSICS
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Abstract
The application relates to the technical field of current testing, in particular to a method and a system for testing high current of an igniter, wherein the method comprises the following steps: collecting current and voltage data of the igniter high-current tester meeting the duration in real time; the rising rate of the current and the rising stability are evaluated by analyzing the rising rate requirement of the output current and constructing a current rising fluctuation index; based on the output current intensity and duration time requirements, constructing a potential abnormality index, and evaluating the intensity and stability of the output current; and analyzing the association relation between the output current and the output voltage to obtain an asynchronism index, constructing a standard index, and comprehensively evaluating the continuous stability of the output current of the tester. Therefore, the igniter high-current tester meeting the high-current test condition is obtained, the blank of the igniter in the aspect of high-current test is filled, and basic conditions are provided for performance evaluation and quality control of the igniter in a high-load environment.
Description
Technical Field
The application relates to the technical field of current testing, in particular to a method and a system for testing high current of an igniter.
Background
In modern industrial systems, the ignition tool is used as a key safety starting element and is widely applied to various fields of automobiles, aerospace, gunpowder and the like. The reliability and the safety of the system are directly related to the normal operation of the whole system and even the safety of personnel, lives and property. In order to ensure performance of the igniter under various operating conditions, it is necessary to perform stringent functional and durability tests, wherein high current tests are particularly critical. This test is intended to simulate the high current impact that an igniter may encounter under extreme conditions to verify that it can withstand high current transient effects such as overload, thermal stress, and arcing effects in a short period of time, and to evaluate its ability to withstand faults in practical applications.
However, the existing high current testing methods and techniques still have short boards. In particular, referring to the 5.18 high current test requirement in the european standard vw_80152, a current with specific parameters (such as rising edge, amplitude, duration) needs to be applied to the igniter to accurately simulate the extreme conditions in the actual application scenario. Namely, the high-current test conditions that the current is more than or equal to 38A, the current rising rate is more than or equal to 1A/us and the duration is more than or equal to 500us can not be provided, so that the ignition device has a short plate in the aspect of high-current test, and the performance evaluation and the quality control of the ignition device under the high-load environment can be influenced.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a method and a system for testing a large current of an igniter, which determine whether a tester meets a testing environment for testing the large current of the igniter according to a large current testing requirement.
The first aspect of the application provides a method for testing a high current of an igniter, which comprises the following steps:
Taking a sequence formed by the output current and voltage data acquired by the ignition instrument with high current in a plurality of duration as each output current data sequence and output voltage data sequence;
Acquiring current rising fluctuation indexes of all the ignition instrument heavy current testers according to rising trend and fluctuation conditions of current values of all the output current data sequences of all the ignition instrument heavy current testers in a first preset time range;
obtaining standard indexes of the high-current testers of all the ignition tools according to the similarity of all the output current data sequences and the data changes of the output voltage sequences in a second preset time range of the high-current testers of all the ignition tools;
and obtaining a verification result of the ignition tool heavy current tester through a standard index of the ignition tool heavy current tester.
In one embodiment, the step of obtaining the current rise fluctuation index of the igniter high-current tester includes:
Taking a subsequence corresponding to a first preset time range of each output current data sequence as a rising data sequence of each output current;
According to all data change trends in the ascending data sequence of each output current, combining the current ascending rate required by the test to obtain an extraction sequence of each output current;
Based on the reject level of data in the extraction sequence of any two output currents, obtaining the reject weight difference of the any two output currents;
based on the data distribution difference characteristics of the ascending data sequences of the arbitrary twice output currents, combining the unqualified weight differences to obtain the ascending difference of the arbitrary twice output currents;
Calculating the average value of the rising difference of each output current and all other output currents, and taking the average value as the average rising difference of each output current; and taking the off-center distribution trend value of the average rising difference of all output currents of each ignition instrument large-current tester as the current rising fluctuation index of each ignition instrument large-current tester.
In one embodiment, the extraction sequence for obtaining each output current is specifically:
Calculating the difference value between each element of the ascending data sequence of each output current and the previous element; and if the difference value is smaller than the standard current rising rate of the large current test, acquiring two elements corresponding to the difference value as elements of the extraction sequence corresponding to the output current.
In one embodiment, the obtaining the disqualification weight difference of the arbitrary two output currents specifically includes:
If the minimum value in the extraction sequence of each output current is greater than or equal to the standard current threshold value of the large current test, taking 0 as the disqualification weight of the corresponding output current; otherwise, taking the first set value larger than zero as the disqualification weight of the corresponding output current; calculating the mapping of the sum of the unqualified weights of the output currents at any two times on an exponential function; and the disqualified weight difference of the current output at any two times and the mapping result form a consistent change trend.
In one embodiment, the obtaining the rising difference of the arbitrary two output currents includes:
Acquiring the slope of a fitting straight line of the ascending data sequence of each output current, and marking the slope as the fitting slope of each output current;
recording the absolute value of the difference value of the fitting slope of the arbitrary twice output current as the slope difference of the arbitrary twice output current;
Recording the absolute value of the difference value of the variation coefficient of the extraction sequence of the arbitrary twice output current as the variation difference of the arbitrary twice output current;
And taking the sum of the slope difference value, the variation difference value and the disqualified weight difference value of the arbitrary two output currents as the rising difference of the arbitrary two output currents.
In one embodiment, the step of obtaining the standard index of each igniter high current tester comprises the following specific steps:
Obtaining potential abnormality indexes of the output currents based on the stable characteristics of all data of the second preset time range of the output currents;
Obtaining an asynchronous index of each output current based on the difference degree of the data distribution of each output current data sequence and the corresponding output voltage data sequence;
Taking the multiplication result of the asynchronous index of any output current and the potential abnormality index as a concerned index of any output current; the average value of the attention indexes of all the output currents of the ignition instrument heavy current tester is recorded as the attention distribution index of the ignition instrument heavy current tester; the standard index of the ignition instrument large-current tester and the attention distribution index and the current rising fluctuation index are opposite in change trend.
In one embodiment, the potential abnormality index of each output current is obtained specifically as follows:
Taking a subsequence corresponding to a second preset time range in each output current data sequence as a stable data sequence of each output current;
If the element minimum value in the stable data sequence of each output current is larger than or equal to the standard current threshold value, taking the difference value between the element minimum value and the standard current threshold value as the standard weight of each output current; otherwise, taking the second set value smaller than zero as the standard reaching weight of each output current;
And the standard reaching rate of each output current and the standard reaching weight form a consistent change trend.
In one embodiment, the asynchronous index of each output current is obtained specifically as follows:
Acquiring a stable data sequence of each output voltage by adopting the same method as the stable data sequence of each output current;
acquiring correlation coefficients of stable data sequences of each output current and each output voltage;
dividing the stable data sequences of the output currents and the output voltages respectively to obtain subsequences of the stable data sequences of the output currents and the output voltages;
Respectively taking a sequence consisting of the element numbers of all sub-sequences of the stable data sequences of each output current and each output voltage as a segmentation number sequence of each output current and each output voltage;
obtaining the similarity of the divided number sequences of each output current and each output voltage, and recording the similarity as the consistency degree of each output current and each output voltage;
And calculating the absolute value of the correlation coefficient of each output current and each output voltage plus the consistency degree, and calculating the reciprocal as the asynchronous correlation degree of each output current.
In one embodiment, the method for obtaining the verification result of the igniter high-current tester comprises the following steps:
Judging that the ignition tool heavy current tester with the normalized value of the standard index being larger than a preset threshold meets the heavy current test requirement; otherwise, the high-current tester of the igniter is not consistent.
In a second aspect, the present application provides a high-current testing system for an igniter, comprising a memory, a processor and a computer program stored in the memory and running on the processor, the processor implementing the steps of any one of the methods described above when executing the computer program.
The application has at least the following beneficial effects:
When the output current and voltage data of the ignition tester with high current are collected, the tester is subjected to preliminary screening according to the duration time of the high current test, and then a corresponding sequence is obtained; the tester meeting the requirements is found more efficiently, the time for analyzing the data later is saved, and the testing efficiency is improved; according to the test requirement of the ignition device on high current, an extraction sequence is constructed according to the rising rate of the tester, and a data basis is provided for further checking whether the current intensity meets the test requirement; constructing unqualified weight differences, comparing the differences among different output current intensities, and further judging whether the output current intensity of the tester meets the test requirement or not; constructing rising difference and describing the difference characteristics of different current rising rates; finally, a current rising fluctuation index is obtained, and the stable characteristic of the rising rate of the output current is described, so that the rising performance of the tester can be judged better, and the situation of misjudgment is reduced; constructing a potential abnormality index, and evaluating the duration and stability of the output current after the output current reaches an intensity standard; constructing an asynchronism index, and evaluating the change condition of output current and output voltage to judge the robustness of the tester in the running process; and constructing a standard index of the standard index pair tester, and finally judging the output current to evaluate whether the standard index pair tester has a stable test condition for carrying out high-current test on the igniter or not. The high-current tester for the igniter meets the point high-current test environment, has good stability and provides necessary test conditions for the safety test of the igniter; fills the blank of the ignition tool in the aspect of high-current test, and provides basic conditions for performance evaluation and quality control of the ignition tool in a high-load environment.
Drawings
FIG. 1 is a flow chart of the steps of a method for testing a lighting fixture for high current according to an embodiment of the present application;
FIG. 2 is a flow chart of the current rise fluctuation index acquisition according to one embodiment of the present application;
Fig. 3 is a flowchart of obtaining a standard index according to an embodiment of the present application.
Detailed Description
In describing embodiments of the present application, words such as "exemplary," "or," "such as," and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "or," "such as," and the like are intended to present related concepts in a concrete fashion.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It should be further noted that the terms "first" and "second" in the present specification and drawings are used for distinguishing between similar objects and not for describing a particular sequential or chronological order. The method disclosed in the embodiments of the present application or the method shown in the flowchart includes one or more steps for implementing the method, and the execution sequence of the steps may be interchanged with each other, where some steps may be deleted without departing from the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
The application provides a method and a system for testing a large current of an igniter, which are specifically described below with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a method for testing a lighting fixture with high current according to an embodiment of the application is shown, the method comprises the following steps:
In this embodiment, the high current tester of each igniter is verified according to the 5.18 high current test requirement in the european standard vw_80152, so as to provide necessary test conditions for the safety test of the igniter.
S1: and taking a sequence consisting of output current and voltage data acquired by the tester with high current in a plurality of duration as each output current data sequence and each output voltage data sequence.
In order to fill the blank of the igniter in the aspect of heavy current test, the application carries out heavy current test on the igniter by using a heavy current tester consisting of a core control circuit (consisting of an MCU, a crystal oscillator, a capacitor, a resistor, and the like), a current feedback control circuit (consisting of an electromagnetic isolation chip, a digital-to-analog conversion chip, an operational amplifier, an NMOS tube, a resistor, a capacitor, and the like), an interaction and communication circuit (consisting of a key, an optocoupler, a resistor, a capacitor, an LCD, an RS485 communication chip, and the like), and the like.
In some embodiments of the application, the igniter high-current tester is customized strictly according to the 5.18 high-current test requirement in European standard VW_80152, so that accurate simulation tests with current not less than 38A, current rising rate not less than 1A/us and duration not less than 500us can be provided for the igniter. It will be appreciated that in the 5.18 high current test requirement in the European standard VW_80152, the standard current threshold is 38A and the standard current rise rate is 1A/us.
In the development process, the application implements a plurality of test steps to verify whether the tester meets the test environment for the high-current test of the igniter. The application adopts a high-frequency wide-range current probe and a high-precision oscilloscope to collect the output current and the output voltage of the ignition instrument high-current tester in real time; in some embodiments of the present application, the time interval for data collection is 1us, and the period for collection is the duration of each output current; the time interval of data acquisition and the selection of acquisition times can be flexibly selected by an implementer according to actual conditions, and the application is not limited to the selection.
Judging the data length of all the acquired output current data and output voltage data, if the data length acquired once is less than 500, directly judging that the tester cannot meet the test requirement of carrying out high-current test on the igniter; otherwise, the output current data and the output voltage data collected each time are formed into an output current data sequence and an output voltage data sequence each time according to the time sequence.
It should be noted that, since the duration of each output current may not be uniform, the data lengths of the constructed output current data sequence and the constructed output voltage data sequence are not uniform.
S2: and obtaining the current rising fluctuation index of each ignition instrument heavy current tester according to the rising trend and fluctuation condition of the current values of all the output current data sequences of each ignition instrument heavy current tester in the first preset time range.
Since one of the test requirements for the ignition device with high current is that the rising rate of the output current is more than or equal to 1A/us, the intensity of the output current is more than or equal to 38A necessarily at 38 us. However, since the rising rate of the output current is not equal to or greater than 1A/us, the rising rate is not steadily increased according to 1A/us every time, so that the output current is in accordance with the output standard of 38A when the time is less than 38us, and thus the phenomenon of stable fluctuation tends to occur, and when the rising rate is calculated directly according to the difference between adjacent moments, the rising rate is possibly less than 1A/us when the rising rate is near 38us, and thus false detection is caused; therefore, further processing of the output current data is required to avoid false detection.
Based on this, the output current data sequence of the ith output current is abbreviated as a sequence. Since the processing mode of each output current sequence is the same, the application uses the sequenceAnalysis was performed for the example:
according to a first preset time range From the sequenceExtracting subsequence to obtain the ascending data sequence of the ith output current, which is abbreviated as sequence。
S201: and according to all data change trends in the ascending data sequence of each output current, combining the current ascending rate required by the test to obtain an extraction sequence of each output current.
Computing a sequenceDifferences between each element and the previous element value; if the difference is greater than or equal to 1, the current rising rate is more than or equal to 1A/us; if the difference value is smaller than 1, and the current rising rate does not meet the test requirement, acquiring two elements corresponding to the difference value, and taking the two elements as elements of an extraction sequence of the ith output current.
The extraction sequence of the ith output current is abbreviated as the extraction sequence. And judging the current rising rate to obtain an extraction sequence, and providing a data basis for further checking whether the current intensity meets the test requirement.
S202: based on the reject level of the data in the extraction sequence of any two output currents, the reject weight difference of any two output currents is obtained.
If the sequence isIf the minimum value of (2) is 38 or more, 0 is used as the disqualification weight of the ith output current; if the sequence isThe minimum value of (2) is smaller than 38, and the first set value is taken as the disqualification weight of the ith output current; in some embodiments of the application, the first set value is 10. Calculating a function value taking a natural constant e as a base and taking the sum of unqualified weights of the ith and jth output currents as an index; the disqualification weight difference of the ith and jth output currents is consistent with the change trend of the function value.
In some embodiments of the present application, the result of subtracting 1 from the function value of the ith and jth output currents is used as the disqualification weight difference between the ith and jth output currents.
The larger the disqualified weight difference is, the more in at least one of the ascending data sequences of the ith and the jth output currents, the condition that the current ascending rate is not in accordance with the high current test requirement of the ignition device is shown; if the output current rising rates of the ith output current and the jth output current meet the test requirements, the value of the disqualified weight difference is 0; otherwise, through the mapping of the exponential function, the larger the disqualification weight difference value is, the higher the probability of disqualification of the large current rising rate is.
S203: and based on the data distribution difference characteristics of the ascending data sequences of the arbitrary twice output currents, combining the unqualified weight differences to obtain the ascending difference of the arbitrary twice output currents.
Fitting the ascending data sequence of each output current to obtain the slope of a fitting straight line, and marking the slope as the fitting slope of each output current; in some embodiments of the present application, the fitting method uses a least square method, and the practitioner may choose other fitting methods, which the present application is not limited to; the least square method is a well-known technique and will not be described here.
The absolute value of the difference value of the fitting slope of the ith output current and the jth output current is recorded as the slope difference; the absolute value of the difference value of the variation coefficient of the extraction sequence of the ith output current and the jth output current is recorded as variation difference; and taking the sum of the slope difference, the variation difference and the disqualification weight difference of the ith output current and the jth output current as the rising difference of the ith output current and the jth output current.
In the data sequence of the i-th and j-th output currents, if the rising rates of the output currents are consistent and the maximum values of the output currents are not different, the difference of the variation coefficients of the extracted sequences corresponding to the two output current data is smaller, and similarly, the slope of the fitting straight line is closer, the value of the rising difference is smaller, which means that the probability that the rising rate between the output current data of the i-th and j-th output currents meets the test requirement is larger, and the rising trend has certain similarity, the corresponding rising difference is smaller.
S204: and obtaining the current rise fluctuation index of each ignition instrument heavy current tester based on the rise difference of the output current of each ignition instrument heavy current tester for any two times.
Calculating the average value of the rising difference of the ith output current and all other output currents, and taking the average value as the average rising difference of the ith output current; and taking the off-center distribution trend value of the average rising difference of all output currents of each ignition instrument large-current tester as the current rising fluctuation index of each ignition instrument large-current tester.
It should be noted that, the off-center distribution trend value measures the degree of dispersion of the data distribution, and mainly includes: the present application is not limited to the polar difference, the quartile range, the variance, the standard deviation, the coefficient of variation, and the like.
In some embodiments of the present application, the standard deviation of the average rise difference of all the output currents of each igniter high-current tester is used as the current rise fluctuation index of the igniter high-current tester.
The flow chart for obtaining the current rising fluctuation index is shown in fig. 2.
It should be understood that the smaller the value of the current rise fluctuation index is, the higher the rise rate of the output current accords with the high current test requirement of the igniter, and the rise rate of the output current is more consistent each time, the higher the rise rate of the output current of the tester has certain stability, no larger fluctuation occurs, and the rise rate meets the high current test requirement of the igniter.
By calculating the rising stability of the output current, not only is the situation that the output current can reach 38A in a short time considered, but also the rising rate stability of the output current of the tester is considered, so that whether the tester really meets the test requirement or can meet the test requirement occasionally is verified.
S3: and obtaining the standard index of each ignition instrument large current tester according to the similarity of all output current data sequences and data changes of the output voltage sequences in a second preset time range of each ignition instrument large current tester.
After checking whether the rising trend of the output current data in the previous period of time reaches the standard, the intensity and duration of the output current data in the latter period of time need to be continuously checked to judge whether the current has abnormal conditions.
S301: and obtaining potential abnormality indexes of the output currents based on the stable characteristics of all data of the second preset time range of the output currents.
In sequence ofFor example, according to the subscript rangeFrom the sequenceThe sub-sequence is extracted and is marked as a stable data sequence of the ith output current, which is abbreviated as a sequence。
The test requirement of the ignition device with large current is that the rising rate of the output current is more than or equal to 1A/us, and the output current is more than 38A after being stable; therefore, if the tester meets the test requirement, the sequence is thatThe values of all elements in the table are greater than or equal to 38. If the sequence isThe minimum value of the elements in the sequence is greater than or equal to 38, and the sequence is thenThe difference value between the minimum value of the medium element and 38 is used as the standard reaching weight of the ith output current; if the minimum value is smaller than 38, the second set value is used as the standard reaching weight of the ith output current; and the standard reaching rate of the ith output current and the standard reaching weight form a consistent trend relation.
In the embodiment of the application, the second set value is-10; taking a natural constant e as a base number, and taking the standard reaching weight of the ith output current as an index, and taking the result as the standard reaching rate of the ith output current.
It will be appreciated that if the sequence isAll elements in the alloy are more than or equal to 38, so that the standard reaching rate is higher; if the element value is smaller than 38, the standard reaching rate approaches 0.
Sequences are sequencedThe product of the coefficient of variation and the extremely poor is recorded as the fluctuation rate; taking a natural constant e as a base number, and taking an exponential function calculation result taking the standard reaching weight of the ith output current as an index as a standard line distance; calculating the ratio result taking the fluctuation rate as a numerator and taking the integral of the standard rate and the standard line distance as an denominator, and recording the ratio result as the potential abnormality index of the ith output current.
It should be noted that, if the product of the variation coefficient and the extremely poor result is smaller, the output current is more stable and the fluctuation is smaller, and at this time, if the value of the standard line distance is larger, the output current still has stronger stability after reaching the test requirement. The larger the product of the variation coefficient and the extremely poor result, the more unstable the output current and the larger the fluctuation, and the larger the potential problem is caused if the value of the standard line distance is smaller. Therefore, in the calculation process of the potential abnormality index, if the value of the numerator is larger, the value of the denominator is smaller, the potential problem occurrence probability is also larger, and if the intensity is smaller than 38, the value of the denominator is extremely small, so that the value of the potential abnormality index is extremely large; if the value of the numerator is smaller, the fluctuation of the output current is smaller, and if the value of the denominator is larger, the potential abnormality index is smaller, so that the output current of the tester can still continuously and stably output current after meeting the 38A current intensity test requirement.
The potential abnormality index not only judges whether the current is always larger than 38A, but also calculates the fluctuation degree of the output current and the close proximity degree of the output current to the standard threshold 38A, and comprehensively evaluates the stability of the ith output current.
S302: and obtaining the asynchronism index of each output current based on the difference degree of the data distribution of each output current data sequence and the corresponding output voltage data sequence.
According to ohm's law, the output voltage of a circuit is normally affected by a resistor, and when the output current increases, the increase in current flowing through the resistor causes a synchronous increase in the voltage drop across the resistor. This increased voltage drop counteracts part of the output voltage, thereby reducing the output voltage and exhibiting a certain negative correlation with the output current; and the output current and the output voltage are synchronized.
Based on this, the output voltage data sequence acquired at the ith time is abbreviated as a sequence; Employing and sequenceThe same method of (1) obtaining a stable data sequence of the ith output current, abbreviated as sequence. Acquisition sequenceAnd sequenceThe correlation coefficient of the ith output current and the output voltage is recorded as the correlation coefficient of the ith output current and the output voltage; respectively aligning sequences by adopting a sequence segmentation algorithmSequence ofSegmentation is carried out to obtain a sequenceSequence ofIs a subsequence of (a); in some embodiments of the present application, the computation of the correlation coefficient uses pearson similarity coefficients; a Bernaola Galvan (BG) segmentation algorithm is adopted to segment the sequence, and an operator can select a correlation coefficient and a sequence segmentation acquisition method according to actual conditions, so that the application is not limited.
Respectively sequenceSequence ofThe sequence consisting of the number of elements of all the subsequences is used as the sequence of the number of divisions of the ith output current and output voltage. For example, sequencesIs divided into 3 subsequences, namely L1, L2 and L3, and the number of elements in the three subsequences is 11, 22 and 33 respectively, the number of the i-th output current is divided into the sequences of; Sequence(s)Is divided into 5 subsequences, namely Y1, Y2, Y3, Y4 and Y5, and the number of elements in the five subsequences is 1, 2, 3,4 and 5 respectively; the number sequence of the i-th output voltage is that。
Obtaining the similarity of the number sequences of the ith output current and the output voltage, and marking the similarity as the consistency degree of the ith output current and the output voltage; in some embodiments of the present application, the similarity is measured using a Jaccard similarity coefficient, for similarity between two unequal length sequences; jaccard similarity coefficients are known in the art and will not be described in detail herein.
In some embodiments of the present application, the absolute value of the correlation coefficient between the ith output current and the voltage and the reciprocal of the addition result of the degree of coincidence are calculated and recorded as the asynchronous correlation degree of the ith output current. When the ith output current is consistent with the voltage change and the synchronism is high, the correlation coefficient is larger; meanwhile, the number of the sub-sequences after segmentation is more consistent, and the number of the elements in each sub-sequence is more consistent, so that the value of the consistency degree is larger, and the asynchronous association degree is smaller. If the changes are inconsistent, an abnormal situation may occur, and the asynchronous association degree is large.
Calculating the sum of the absolute values of the differences of all corresponding position elements of the dividing number sequence between the ith output current and the output voltage, and recording the sum as the corresponding number difference of the ith output current; note that if the data lengths of the two sequences are not identical, 0 is appended to the end of the shorter sequence to make the data lengths identical. If the variation of the output current and the output voltage is consistent, the number difference of elements in the divided number sequence between the ith output current and the output voltage is more consistent, and the corresponding number difference is smaller.
And the asynchronous index of the ith output current, the asynchronous association degree and the corresponding number difference all show consistent change trend.
In some embodiments of the present application, the asynchronization index of the ith output current is a product of the asynchronization correlation degree and the corresponding number difference. If the output current is consistent with the change of the output voltage, the asynchronism index is smaller, and if the output current is inconsistent with the change, the asynchronism index is larger, so that the probability of the tester having a problem is larger.
S303: and based on the asynchronous indexes of all the output currents, combining the potential abnormality indexes to obtain the standard index of the igniter high-current tester.
And (3) recording the multiplication result of the asynchronous index between the ith output current and the output voltage and the potential abnormality index of the ith output current as the attention index of the ith output current. If the fluctuation of the ith output current is stable or far greater than 38A, the possibility that the current intensity is reduced to be less than 38A is small, and the output current and the output voltage have a strong association relationship and are synchronously changed, the attention index of the ith output current is small, and the attention of the ith output current is required to be small.
The average value of the attention indexes of all the output currents of the ignition instrument heavy current tester is recorded as the attention distribution index of the ignition instrument heavy current tester; the standard index of the ignition instrument large-current tester and the attention distribution index and the current rising fluctuation index are opposite in change trend.
In the embodiment of the application, the inverse of the sum of the attention distribution index and the current rising fluctuation index of the igniter high-current tester is used as the standard index of the igniter high-current tester.
Wherein, the standard index is obtained through a flow chart as shown in fig. 3.
It should be noted that, if the sum is 0, the ratio of the molecule to the preset adjustment parameter greater than zero is used as the standard index of the tester. When the rising rate of the output current of the tester meets the test requirement each time, after the current intensity of 38A is reached, the current intensity meeting the test requirement can be continuously and stably output, meanwhile, when the high-power current is output, the tester operates stably, the phenomenon that the current and the voltage change asynchronously does not occur, the standard index value of the tester is larger, and the tester is proved to fully meet the test condition of carrying out the high-current test on the ignition tool.
The stability of the tester can be further evaluated by calculating the association relation between the output current and the output voltage each time; and finally, through calculation of a standard index, whether the output current of the tester can stably meet the high-current test requirement of the igniter can be evaluated.
S4: and obtaining a verification result of the ignition tool heavy current tester through a standard index of the ignition tool heavy current tester.
Normalizing the standard index of the igniter high-current tester, and judging that the igniter high-current tester provided by the application meets the 5.18 high-current test requirement in European standard VW_80152 when the normalized value is greater than a preset threshold value; otherwise, the requirement of the 5.18 high current test in the European standard VW_80152 is not met.
When the requirements of a high-current test are met, current with specific parameters (such as rising edge, amplitude and duration) is applied to the igniter, the capacitor charging voltage is set through the potentiometer, the MCU acquires the voltage on the capacitor through the ADC, after the voltage is stable, a trigger instruction can be sent through the ignition key, the IGBT pair is driven at the moment, the high-current test is carried out on the igniter through a series-connected 1 omega resistor, and the test method capable of carrying out the high-current test on the igniter is realized.
In some embodiments of the present application, the preset threshold value is 0.5.
Based on the same inventive concept as the above method, the embodiment of the application further provides an igniter heavy current testing system, which comprises a memory, a processor and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to realize the steps of any one of the igniter heavy current testing methods.
In summary, in the embodiment of the application, when the output current and voltage data of the ignition instrument high-current tester are collected, the tester is initially screened according to the duration time of the high-current test, and then a corresponding sequence is obtained; the tester meeting the requirements is found more efficiently, the time for analyzing the data later is saved, and the testing efficiency is improved; according to the test requirement of the ignition device on high current, an extraction sequence is constructed according to the rising rate of the tester, and a data basis is provided for further checking whether the current intensity meets the test requirement; constructing unqualified weight differences, comparing the differences among different output current intensities, and further judging whether the output current intensity of the tester meets the test requirement or not; constructing rising difference and describing the difference characteristics of different current rising rates; finally, a current rising fluctuation index is obtained, and the stable characteristic of the rising rate of the output current is described, so that the rising performance of the tester can be judged better, and the situation of misjudgment is reduced; constructing a potential abnormality index, and evaluating the duration and stability of the output current after the output current reaches an intensity standard; constructing an asynchronism index, and evaluating the change condition of output current and output voltage to judge the robustness of the tester in the running process; and constructing a standard index of the standard index pair tester, and finally judging the output current to evaluate whether the standard index pair tester has a stable test condition for carrying out high-current test on the igniter or not. The high-current tester for the igniter meets the point high-current test environment, has good stability and provides necessary test conditions for the safety test of the igniter; fills the blank of the ignition tool in the aspect of high-current test, and provides basic conditions for performance evaluation and quality control of the ignition tool in a high-load environment.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the essential characteristics thereof. Accordingly, the above-described embodiments of the present application should be considered in all respects as illustrative and not restrictive; the technical solutions described in the foregoing embodiments are modified or some of the technical features are replaced equivalently, so that the essence of the corresponding technical solutions does not deviate from the scope of the technical solutions of the embodiments of the present application, and all the technical solutions are included in the protection scope of the present application.
Claims (4)
1. A method for testing a high current of an igniter, comprising the steps of:
Taking a sequence formed by the output current and voltage data acquired by the ignition instrument with high current in a plurality of duration as each output current data sequence and output voltage data sequence;
Acquiring current rising fluctuation indexes of all the ignition instrument heavy current testers according to rising trend and fluctuation conditions of current values of all the output current data sequences of all the ignition instrument heavy current testers in a first preset time range;
obtaining standard indexes of the high-current testers of all the ignition tools according to the similarity of all the output current data sequences and the data changes of the output voltage sequences in a second preset time range of the high-current testers of all the ignition tools;
Obtaining a verification result of the ignition device heavy current tester through a standard index of the ignition device heavy current tester;
The method for acquiring the current rising fluctuation index of the igniter high-current tester comprises the following specific steps of:
Taking a subsequence corresponding to a first preset time range of each output current data sequence as a rising data sequence of each output current;
According to all data change trends in the ascending data sequence of each output current, combining the current ascending rate required by the test to obtain an extraction sequence of each output current;
Based on the reject level of data in the extraction sequence of any two output currents, obtaining the reject weight difference of the any two output currents;
based on the data distribution difference characteristics of the ascending data sequences of the arbitrary twice output currents, combining the unqualified weight differences to obtain the ascending difference of the arbitrary twice output currents;
Calculating the average value of the rising difference of each output current and all other output currents, and taking the average value as the average rising difference of each output current; taking the off-center distribution trend value of the average rising difference of all output currents of each ignition instrument heavy current tester as the current rising fluctuation index of each ignition instrument heavy current tester;
The unqualified weight difference of the output current of any two times is obtained specifically as follows:
If the minimum value in the extraction sequence of each output current is greater than or equal to the standard current threshold value of the large current test, taking 0 as the disqualification weight of the corresponding output current; otherwise, taking the first set value larger than zero as the disqualification weight of the corresponding output current;
calculating the mapping of the sum of the unqualified weights of the output currents at any two times on an exponential function; the disqualified weight difference of the current output at any two times and the mapping result form a consistent change trend;
The step of obtaining the rising difference of the arbitrary two output currents includes:
Acquiring the slope of a fitting straight line of the ascending data sequence of each output current, and marking the slope as the fitting slope of each output current;
recording the absolute value of the difference value of the fitting slope of the arbitrary twice output current as the slope difference of the arbitrary twice output current;
Recording the absolute value of the difference value of the variation coefficient of the extraction sequence of the arbitrary twice output current as the variation difference of the arbitrary twice output current;
Taking the sum of the slope difference value, the variation difference value and the disqualification weight difference value of the arbitrary twice output current as the rising difference of the arbitrary twice output current;
the standard index of each ignition tool heavy current tester is obtained by the specific steps:
Obtaining potential abnormality indexes of the output currents based on the stable characteristics of all data of the second preset time range of the output currents;
Obtaining an asynchronous index of each output current based on the difference degree of the data distribution of each output current data sequence and the corresponding output voltage data sequence;
Taking the multiplication result of the asynchronous index of any output current and the potential abnormality index as a concerned index of any output current; the average value of the attention indexes of all the output currents of the ignition instrument heavy current tester is recorded as the attention distribution index of the ignition instrument heavy current tester; the standard index of the ignition instrument large-current tester, the attention distribution index and the current rising fluctuation index are opposite in change trend; taking the reciprocal of the sum of the attention distribution index and the current rising fluctuation index of the igniter high-current tester as the standard index of the igniter high-current tester;
the potential abnormality indexes of the output currents are obtained specifically as follows:
Taking a subsequence corresponding to a second preset time range in each output current data sequence as a stable data sequence of each output current;
If the element minimum value in the stable data sequence of each output current is larger than or equal to the standard current threshold value, taking the difference value between the element minimum value and the standard current threshold value as the standard weight of each output current; otherwise, taking the second set value smaller than zero as the standard reaching weight of each output current;
the standard reaching rate of each output current and the standard reaching weight form a consistent change trend;
The asynchronous index of each output current is obtained specifically as follows:
Acquiring a stable data sequence of each output voltage by adopting the same method as the stable data sequence of each output current;
acquiring correlation coefficients of stable data sequences of each output current and each output voltage;
dividing the stable data sequences of the output currents and the output voltages respectively to obtain subsequences of the stable data sequences of the output currents and the output voltages;
Respectively taking a sequence consisting of the element numbers of all sub-sequences of the stable data sequences of each output current and each output voltage as a segmentation number sequence of each output current and each output voltage;
obtaining the similarity of the divided number sequences of each output current and each output voltage, and recording the similarity as the consistency degree of each output current and each output voltage;
And calculating the absolute value of the correlation coefficient of each output current and each output voltage plus the consistency degree, and calculating the reciprocal as the asynchronous correlation degree of each output current.
2. The method for testing a large current of an igniter as defined in claim 1, wherein said extracting sequence for obtaining each output current comprises:
Calculating the difference value between each element of the ascending data sequence of each output current and the previous element; and if the difference value is smaller than the standard current rising rate of the large current test, acquiring two elements corresponding to the difference value as elements of the extraction sequence corresponding to the output current.
3. The method for testing a high current of an igniter as defined in claim 1, wherein the method for obtaining the verification result of the high current tester of the igniter is as follows:
Judging that the ignition tool heavy current tester with the normalized value of the standard index being larger than a preset threshold meets the heavy current test requirement; otherwise, the high-current tester of the igniter is not consistent.
4. A high current testing system for an igniter comprising a memory, a processor and a computer program stored in said memory and running on said processor, wherein said processor implements the steps of the method according to any one of claims 1-3 when said computer program is executed by said processor.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0512838D0 (en) * | 2001-12-28 | 2005-08-03 | Intel Corp | Mechanism for estimating and controling DI/DT-induced power supply voltage variations |
| CN210570258U (en) * | 2019-09-09 | 2020-05-19 | 西安迈瑞智联信息技术有限公司 | Artificial precipitation rocket projectile, ignition device and artificial precipitation system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH373467A (en) * | 1957-12-23 | 1963-11-30 | Siemens Ag | Procedure for testing the stress on AC switching devices when interrupting currents and the arrangement for performing this procedure |
| JP4123827B2 (en) * | 2002-05-27 | 2008-07-23 | トヨタ自動車株式会社 | Control device using current detection device |
| US7355376B2 (en) * | 2005-03-03 | 2008-04-08 | Cardiac Pacemakers, Inc. | Battery status indicator compensating for battery voltage recovery |
| CN105740569B (en) * | 2016-02-24 | 2019-09-03 | 国家电网公司 | Establishment method of current transformer engineering model based on transient high current test technology |
| CN108051723B (en) * | 2017-12-26 | 2019-08-02 | 华北电力大学 | A kind of high current turn-off characteristic test method |
| CN109655654B (en) * | 2019-01-16 | 2023-10-20 | 江苏其厚智能电气设备有限公司 | High-current measurement method and device based on bypass shunt technology |
| CN112698193A (en) * | 2020-12-07 | 2021-04-23 | 国网辽宁省电力有限公司营销服务中心 | Electrical switch tripping performance testing device |
| CN114199087B (en) * | 2021-12-10 | 2023-12-29 | 苏州烽燧电子有限公司 | Emission control device of electronic fuze |
| CN115236580A (en) * | 2022-07-14 | 2022-10-25 | 华能罗源发电有限责任公司 | Method for detecting state quantity of current transformer in GIS of thermal power energy storage system |
| CN117096848A (en) * | 2023-07-05 | 2023-11-21 | 国网山东省电力公司日照供电公司 | Virtual synchronous generator high-current prediction method, system, terminal and storage medium |
| CN117491938B (en) * | 2023-12-29 | 2024-03-01 | 国网甘肃省电力公司电力科学研究院 | A current transformer detection and control method for photovoltaic energy storage systems |
| CN117805572A (en) * | 2024-02-29 | 2024-04-02 | 深圳力迈电子有限公司 | Transistor abnormal fault detection method based on data driving |
-
2024
- 2024-05-29 CN CN202410674907.XA patent/CN118244186B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0512838D0 (en) * | 2001-12-28 | 2005-08-03 | Intel Corp | Mechanism for estimating and controling DI/DT-induced power supply voltage variations |
| CN210570258U (en) * | 2019-09-09 | 2020-05-19 | 西安迈瑞智联信息技术有限公司 | Artificial precipitation rocket projectile, ignition device and artificial precipitation system |
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