CN116430153A - Aviation electric signal measuring device and method - Google Patents
Aviation electric signal measuring device and method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
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Abstract
The invention provides an aviation electric signal measuring device and method, the device includes: an oscilloscope for generating corresponding waveform data based on the input digital signal; the signal conditioning module is in communication connection with the oscilloscope, and is used for collecting aviation analog electric signals, converting the aviation analog electric signals into corresponding digital signals and outputting the digital signals to the oscilloscope; the computer module is in communication connection with the oscilloscope, and is used for calling target waveform data from the oscilloscope based on the packaged simplified instruction and carrying out data analysis and measurement on the target waveform data; the simplified instruction is obtained based on VISA instruction encapsulation. The invention can solve the technical problems of high cost and high use difficulty caused by the design of various instrument instruments for aviation signal detection in the prior art.
Description
Technical Field
The invention relates to the technical field of signal detection, in particular to an aviation electric signal measuring device and method.
Background
The types of electrical signals for aviation are numerous, each of which is characterized. The common aviation electric signals comprise aviation bus signals, voltage waveform signals and voltage values, wherein the aviation bus signals are detected by adopting a special aviation bus board card, the voltage signals are detected by adopting a universal meter and an AD acquisition card, the waveform signals are detected by adopting an oscilloscope, an oscilloscope card and an oscillograph recorder, the aviation electric signals are detected by adopting various instruments and meters, the cost is high, and the difficulty in development and use is high.
Disclosure of Invention
In view of the foregoing, it is necessary to provide an avionic signal measuring device and method for solving the technical problems of high cost and high use difficulty caused by designing various instruments for detecting avionic signals in the prior art.
In order to achieve the above object, the present invention provides an avionic signal measuring device, comprising:
an oscilloscope for generating corresponding waveform data based on the input digital signal;
the signal conditioning module is in communication connection with the oscilloscope, and is used for collecting aviation analog electric signals, converting the aviation analog electric signals into corresponding digital signals and outputting the digital signals to the oscilloscope;
the computer module is in communication connection with the oscilloscope, and is used for calling target waveform data from the oscilloscope based on the packaged simplified instruction and carrying out data analysis and measurement on the target waveform data;
the simplified instruction is obtained based on VISA instruction encapsulation.
Further, the signal conditioning module includes:
the first end of the current limiting resistor is connected with the sine wave output end of the oscilloscope, and the second end of the current limiting resistor is connected with the X-axis channel of the oscilloscope;
the first end of the tested component is connected with the second end of the current limiting resistor, and the second end of the tested component is connected with the Y-axis channel of the oscilloscope;
and the first end of the sampling resistor is connected with the second end of the tested part, and the second end of the sampling resistor is grounded.
Further, the computer module is configured to call a UDP port bound to the reduced instruction based on an excel interface, so as to call target waveform data from the oscilloscope, and perform data analysis on the target waveform data.
Further, the computer module is used for calling a UDP port bound with the simplified instruction based on a preset interactive interface so as to call target waveform data from the oscilloscope and perform data analysis operation on the target waveform data.
The invention also provides an aviation electrical signal measurement method which is applied to the device of any one of the above, and comprises the following steps:
acquiring an aviation analog electric signal based on a signal conditioning module, converting the aviation analog electric signal into a corresponding digital signal, and outputting the digital signal to an oscilloscope;
calling target waveform data from the oscilloscope through a packaged simplified instruction based on a computer module, and carrying out data analysis and measurement on the target waveform data;
the simplified instruction is obtained based on VISA instruction encapsulation.
Further, the computer-based module, through encapsulated condensed instructions, invokes target waveform data from the oscilloscope, comprising:
and calling a UDP port bound with the simplified instruction based on an excel interface to call target waveform data from the oscilloscope.
Further, the computer-based module, through encapsulated condensed instructions, invokes target waveform data from the oscilloscope, comprising:
and calling a UDP port bound with the simplified instruction based on a preset interactive interface so as to call target waveform data from the oscilloscope and perform data analysis operation on the target waveform data.
Further, the performing data analysis measurement on the target waveform data includes:
and carrying out waveform comparison analysis on the target waveform data.
Further, the performing waveform contrast analysis on the target waveform data includes at least one of:
parameter analysis: comparing and analyzing selected parameters of the target waveform data;
template comparison: determining a waveform template based on a reference waveform, and comparing and analyzing the target waveform data with the waveform template;
similarity calculation: and comparing and analyzing the waveform similarity and the peak-to-peak value based on the target waveform data.
Further, the performing waveform comparison analysis on the target waveform data includes:
under the condition that the peak value of the target waveform data is normal, carrying out normalization processing on the target waveform data to obtain normalized waveform data;
and performing curve similarity detection on the normalized waveform data, or creating a waveform template based on a reference waveform, and performing analysis detection on the normalized waveform data based on the waveform template.
The beneficial effects of the implementation mode are that: according to the aviation electric signal measuring device and method, the aviation analog electric signal is collected through the signal conditioning module, the aviation analog electric signal is converted into the corresponding digital signal and is input to the oscilloscope, the oscilloscope generates the corresponding waveform data, the computer module calls the simplified instruction obtained based on the VISA instruction package, so that the computer module can analyze and detect the aviation analog electric signal through the waveform data, a plurality of different instruments are prevented from detecting different aviation signals, and the technical problems of high cost and high use difficulty caused by the fact that various instruments are designed for aviation signal detection in the prior art are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of an avionic signal measuring device according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a signal conditioning module according to the present invention;
FIG. 3 is a flow chart of a simplified call instruction provided by the present invention;
FIG. 4 is a flow chart of an embodiment of a method for measuring an avionic signal according to the present invention;
fig. 5 is a schematic flow chart of waveform comparison analysis provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or modules is not necessarily limited to those steps or modules that are expressly listed or inherent to such process, method, article, or device.
The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed according to the time/logic sequence indicated by the naming or numbering, and the named or numbered flow steps may change the execution sequence according to the technical purpose to be achieved, so long as the same or similar technical effects can be achieved.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The invention provides an aviation electric signal measuring device and an aviation electric signal measuring method, which are respectively described below.
As shown in fig. 1, the present invention provides an avionic signal measuring device, comprising:
an oscilloscope 120 for generating corresponding waveform data based on an input digital signal;
the signal conditioning module 130 is in communication connection with the oscilloscope 120, and is configured to collect an aviation analog electrical signal, convert the aviation analog electrical signal into a corresponding digital signal, and output the digital signal to the oscilloscope 120;
the computer module 110 is in communication connection with the oscilloscope 120 and is used for calling target waveform data from the oscilloscope 120 based on the packaged simplified instruction and carrying out data analysis measurement on the target waveform data;
the simplified instruction is obtained based on VISA instruction encapsulation.
It will be appreciated that oscilloscope 120 is an oscilloscope with its own function of generating a functional signal, such as that of DSOX1102G, and that an external function signal generator may be used.
The DSOX1102G oscilloscope has the functions of waveform measurement, voltage measurement, bus decoding, function signal generation and the like, the flexibility of a computer program is fully utilized in the aspect of data analysis, a custom-made signal conditioning circuit is matched, the type of a monitoring signal is enlarged, and the reliability of electric signal contact is ensured by adopting a custom-made clamp. The method of bus analysis can also be used for oscilloscopes with bus decoding functions.
The instruction middle layer is simplified, the operation difficulty of the system is reduced, a series of complex operations of a special instrument are reduced to the operation of simplifying the instruction, and common test operators can formulate and realize the test steps.
The signal conditioning module 130 includes a signal conditioning circuit, a stylus, and a clamp.
In some embodiments, as shown in fig. 2, the signal conditioning module 130 includes:
the first end of the current limiting resistor is connected with the sine wave output end of the oscilloscope, and the second end of the current limiting resistor is connected with the X-axis channel of the oscilloscope;
the first end of the tested component is connected with the second end of the current limiting resistor, and the second end of the tested component is connected with the Y-axis channel of the oscilloscope;
and the first end of the sampling resistor is connected with the second end of the tested part, and the second end of the sampling resistor is grounded.
It can be understood that the DSOX1102G oscilloscope adopted by the invention has a function signal generating function, outputs sine waves, and applies the sine waves to the tested component after passing through a current limiting resistor (such as 1kΩ), so as to ensure that the current passing through the tested component does not exceed the range (the digital circuit generally does not exceed 10 mA), and the voltage of the tested component is collected by the X-axis channel of the oscilloscope. The current passing through the measured component is converted into voltage by using a sampling resistor (such as 1 omega), and the current (corresponding voltage) of the measured component is collected by the Y-axis channel of the oscilloscope. The tested component can be a tested component or a circuit board.
V (voltage) and I (current) signals of the measured components measured by the X-axis channel and the Y-axis channel of the oscilloscope are set in an XY mode, and a VI curve (voltage current curve) of a test point can be displayed.
The invention has the advantages that the frequency of the invention is far more than that of a common VI curve tester, the frequency of the common VI curve tester in the market is generally not more than 100KHz, the frequency of a DSOX function signal generator in an oscilloscope can reach 20MHz, and the frequency of the oscilloscope can reach 200MHz (default 70MHz, optional 200 MHz).
In some embodiments, as shown in fig. 3, the computer module 110 is configured to call a UDP (User Datagram Protocol ) port (i.e., a remote call interface) bound to the reduced instruction based on an excel interface, so as to call target waveform data from the oscilloscope and perform data analysis on the target waveform data.
It can be understood that the general VISA instruction type is complex in operation, and the invention encapsulates complex instructions and operation steps into simplified instructions aiming at DSOX1102G type oscilloscopes, is similar to simple functions, is suitable for user interfaces or remote call interfaces, and can utilize Excel operation.
Because the time for measuring and feeding back is 0.1s (which is equivalent to the reaction speed of a person), the remote calling interface adopts a UDP mode, the simplified instruction middle layer binds a certain UDP port, can feed back within 0.1s, automatically feeds back the result after receiving the instruction, cannot feed back within 0.1s, needs to send the instruction twice, is set for the first time, is a feedback result for the second time, and is controlled by calling software when waiting time is called again, and the feedback result ensures that the simplified instruction middle layer responds in time.
For example, voltage is measured, the operation response speed is fast, a GET VOLT command is sent, and the voltage value is directly fed back.
For example, analyzing waveform data, sending "ANY WAV, u1_1.Stp, U1_1, dat", which means that oscilloscope parameters are set according to u1_1.Stp, measuring waveforms, comparing with u1_1, dat to obtain RESULTs, and then sending "GET RESULT", if the operation is not completed, feeding back "WAIT" to the intermediate layer, and if the operation is completed, feeding back "PASS" or "FAIL" to the intermediate layer.
The remote call interface is based on UDP, is universal, is suitable for various modes, for example, excel can be adopted in batch operation, VBA function is called, dll dynamic link library function is called by the VBA function, and UDP data is received and transmitted by dll; for example, in the occasion with strict requirement on the volume, even a singlechip with a network port can be selected.
In some embodiments, the computer module 110 is configured to call a UDP port bound to the simplified instruction based on a preset interactive interface, so as to call target waveform data from the oscilloscope, and perform a data analysis operation on the target waveform data.
It can be appreciated that the interactive interface is provided with measurement, recording and analysis function keys, in particular:
measurement: and calling a VISA function library to obtain waveforms (picture formats), waveforms (arrays), voltage values, minimum values, maximum values, peak-to-peak values, RS-422 bus decoding, ARINC 429 bus decoding and MIL-1553B bus decoding.
Recording: recording the current value as a reference value for storage, or recording a value for a period of time for post-hoc analysis.
Analysis: analyzing the current value and the reference value, and giving a prompt if the current value and the reference value exceed the error allowable range.
In summary, the aviation electrical signal measuring device provided by the invention comprises: an oscilloscope for generating corresponding waveform data based on the input digital signal; the signal conditioning module 130 is in communication connection with the oscilloscope, and is used for collecting aviation analog electric signals, converting the aviation analog electric signals into corresponding digital signals, and outputting the digital signals to the oscilloscope; the computer module 110 is in communication connection with the oscilloscope, and is used for calling target waveform data from the oscilloscope based on the packaged simplified instruction and carrying out data analysis measurement on the target waveform data; the simplified instruction is obtained based on VISA instruction encapsulation.
In the aviation electric signal measuring device provided by the invention, the aviation analog electric signal is collected through the signal conditioning module 130, the aviation analog electric signal is converted into the corresponding digital signal and is input into the oscilloscope, and the oscilloscope generates the corresponding waveform data, so that the computer module 110 can analyze and detect the aviation analog electric signal through the waveform data, and the problem that a plurality of different instruments are adopted to detect different aviation signals is solved, and the technical problems of high cost and high use difficulty caused by the design of a plurality of instruments in the detection of the aviation signal in the prior art are solved.
As shown in fig. 4, the present invention further provides an avionic signal measurement method, where the method is applied to the device described above, and the method includes:
the simplified instruction is obtained based on VISA instruction encapsulation.
It can be understood that the method provided by the invention can detect the voltage value, the voltage minimum value, the voltage maximum value and the peak-to-peak value of the waveform data, can directly obtain the waveform data according to the VISA instruction, and can compare the current measured value with the reference value.
Bus decoding analysis:
the 16-system numerical value analyzed based on the oscillograph is recorded, and is classified based on Label if the value is ARINC 429 bus and is classified based on address and sub-address if the value is MIL-1553B bus. In the process, the bus signal can be synchronously analyzed and monitored from the perspective of signal quality according to the analysis and judgment of the parameters such as the peak value and the peak value of the waveform. And the analysis of the bus engineering value can further analyze the 16-system data according to the communication protocol, so as to further compare and analyze.
The high resolution of oscilloscopes is mainly used for capturing anomalies such as burrs of electrical signals, and is usually necessary in the design stage, especially in the chip-level design stage, but in the maintenance stage, once a circuit has faults, waveforms are obviously different, so that whether the waveforms have obvious differences needs to be detected.
In some embodiments, the computer-based module 110, with encapsulated condensed instructions, invokes target waveform data from the oscilloscope, including:
and calling a UDP port bound with the simplified instruction based on an excel interface to call target waveform data from the oscilloscope.
In some embodiments, the computer-based module 110, with encapsulated condensed instructions, invokes target waveform data from the oscilloscope, including:
and calling a UDP port bound with the simplified instruction based on a preset interactive interface so as to call target waveform data from the oscilloscope and perform data analysis operation on the target waveform data.
It can be understood that the general VISA instruction type is complex in operation, and the invention encapsulates complex instructions and operation steps into simplified instructions aiming at DSOX1102G type oscilloscopes, is similar to simple functions, is applicable to user interfaces or remote call interfaces, and can utilize Excel operation.
Because the time for measuring and feeding back is 0.1s (which is equivalent to the reaction speed of a person), the remote calling interface adopts a UDP mode, the simplified instruction middle layer binds a certain UDP port, can feed back within 0.1s, automatically feeds back the result after receiving the instruction, cannot feed back within 0.1s, needs to send the instruction twice, is set for the first time, is a feedback result for the second time, and is controlled by calling software when waiting time is called again, and the feedback result ensures that the simplified instruction middle layer responds in time.
For example, voltage is measured, the operation response speed is fast, a GET VOLT command is sent, and the voltage value is directly fed back.
For example, analyzing waveform data, sending "ANY WAV, u1_1.Stp, U1_1, dat", which means that oscilloscope parameters are set according to u1_1.Stp, measuring waveforms, comparing with u1_1, dat to obtain RESULTs, and then sending "GET RESULT", if the operation is not completed, feeding back "WAIT" to the intermediate layer, and if the operation is completed, feeding back "PASS" or "FAIL" to the intermediate layer.
The remote call interface is based on UDP, is universal, is suitable for various modes, for example, excel can be adopted in batch operation, VBA function is called, dll dynamic link library function is called by the VBA function, and UDP data is received and transmitted by dll; for example, in the occasion with strict requirement on the volume, even a singlechip with a network port can be selected.
In some embodiments, the performing data analysis measurements on the target waveform data includes:
and carrying out waveform comparison analysis on the target waveform data.
Further, the performing waveform contrast analysis on the target waveform data includes at least one of:
parameter analysis: comparing and analyzing selected parameters of the target waveform data;
template comparison: determining a waveform template based on a reference waveform, and comparing and analyzing the target waveform data with the waveform template;
similarity calculation: and comparing and analyzing the waveform similarity and the peak-to-peak value based on the target waveform data.
It can be understood that the waveform comparison and analysis flow can be implemented in the following ways, in the actual operation, one or more of them can be selected according to the actual situation, for example, the voltage amplitude and the frequency are focused on by the crystal oscillator waveform, and as to whether the waveform is a standard sine wave or a square wave, the use is generally not affected:
firstly, parameters such as the frequency of the waveform are directly analyzed, and the parameters are compared and analyzed according to the parameters, so that the method is simple and practical, but some complex waveforms cannot be completely judged according to the parameters;
secondly, a template with an allowable error is created for the reference waveform by adopting a template comparison method, and the current waveform is compared with the template, so that the method has relatively high analysis speed and can also analyze more complex waveforms, but is not applicable to the situation that a Li Sharu chart and the like have multiple values in the time domain or the situation that the waveform numerical span is large, but the details need to be judged;
thirdly, calculating the waveform similarity, and judging according to the waveform similarity, wherein the waveform similarity is insensitive to the proportion of the waveform, so that the final judgment can be realized by combining parameters such as peak value and the like.
In some embodiments, as shown in fig. 5, the performing waveform contrast analysis on the target waveform data includes:
under the condition that the peak value of the target waveform data is normal, carrying out normalization processing on the target waveform data to obtain normalized waveform data;
and performing curve similarity detection on the normalized waveform data, or creating a waveform template based on a reference waveform, and performing analysis detection on the normalized waveform data based on the waveform template.
It will be appreciated that the specific analytical steps are as follows:
sampling: because the data volume measured by the oscilloscope reaches tens of thousands or even millions, and the resolution of the oscilloscope screen is limited (for example, the resolution of a picture displayed by the DSOX1102G oscilloscope in real time is only 640 multiplied by 400), massive data needs to be sampled, and a part (for example, 1000 parts) of the data needs to be selected, so that the effect of human eye recognition analysis can be achieved, and the speed of data analysis processing can be increased.
Peak-to-peak comparison: that is, the most obvious difference between the peak values is the difference between the peak values, so that most of fault differences can be detected rapidly through the step, if a problem is found in the step, further detection is not needed, and the analysis efficiency can be greatly improved.
Normalization: firstly, the voltage resolution and time resolution of the current measurement waveform are adjusted to be consistent with the reference waveform, and secondly, the current measurement waveform is horizontally shifted to be consistent with the reference waveform according to edges (if any), so that further analysis is facilitated.
Creating a template: based on the reference waveform, a comparison template (i.e., waveform template) is created that compares the reference waveform, one way is to set the upper and lower limits of the value (e.g., 10%, i.e., 0.5V in the case of 5V/grid) based on the reference waveform.
Template test: if the voltage waveform of the current measurement waveform is within the template range of the reference waveform, the waveform is basically consistent, and if the voltage waveform is out of range, a large difference exists.
Curve similarity detection: and calculating a curve similarity value, which is also waveform similarity detection.
Those skilled in the art will appreciate that all or part of the flow of the methods of the embodiments described above may be accomplished by way of a computer program that instructs associated hardware, and that the program may be stored in a computer readable storage medium. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory.
The aviation electric signal measuring device and the aviation electric signal measuring method provided by the invention are described in detail, and specific examples are applied to illustrate the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.
Claims (10)
1. An avionic signal measuring device, comprising:
an oscilloscope for generating corresponding waveform data based on the input digital signal;
the signal conditioning module is in communication connection with the oscilloscope, and is used for collecting aviation analog electric signals, converting the aviation analog electric signals into corresponding digital signals and outputting the digital signals to the oscilloscope;
the computer module is in communication connection with the oscilloscope, and is used for calling target waveform data from the oscilloscope based on the packaged simplified instruction and carrying out data analysis and measurement on the target waveform data;
the simplified instruction is obtained based on VISA instruction encapsulation.
2. The avionics signal measurement device of claim 1, wherein the signal conditioning module comprises:
the first end of the current limiting resistor is connected with the sine wave output end of the oscilloscope, and the second end of the current limiting resistor is connected with the X-axis channel of the oscilloscope;
the first end of the tested component is connected with the second end of the current limiting resistor, and the second end of the tested component is connected with the Y-axis channel of the oscilloscope;
and the first end of the sampling resistor is connected with the second end of the tested part, and the second end of the sampling resistor is grounded.
3. The avionics signal measurement device of claim 1, wherein the computer module is configured to invoke a UDP port bound to the reduced instruction based on an excel interface to invoke target waveform data from the oscilloscope and perform data analysis on the target waveform data.
4. The avionic signal measurement device of claim 1, wherein the computer module is configured to invoke a UDP port bound to the reduced instruction based on a preset interactive interface to invoke target waveform data from the oscilloscope and perform a data analysis operation on the target waveform data.
5. A method for measuring an avionic signal, applied to the device according to any one of claims 1 to 4, comprising:
acquiring an aviation analog electric signal based on a signal conditioning module, converting the aviation analog electric signal into a corresponding digital signal, and outputting the digital signal to an oscilloscope;
calling target waveform data from the oscilloscope through a packaged simplified instruction based on a computer module, and carrying out data analysis and measurement on the target waveform data;
the simplified instruction is obtained based on VISA instruction encapsulation.
6. The method of claim 5, wherein the computer-based module, via encapsulated condensed instructions, invokes target waveform data from the oscilloscope, comprising:
and calling a UDP port bound with the simplified instruction based on an excel interface to call target waveform data from the oscilloscope.
7. The method of claim 5, wherein the computer-based module, via encapsulated condensed instructions, invokes target waveform data from the oscilloscope, comprising:
and calling a UDP port bound with the simplified instruction based on a preset interactive interface so as to call target waveform data from the oscilloscope and perform data analysis operation on the target waveform data.
8. The method of claim 5, wherein said performing data analysis measurements on said target waveform data comprises:
and carrying out waveform comparison analysis on the target waveform data.
9. The method of claim 8, wherein the performing waveform contrast analysis on the target waveform data comprises at least one of:
parameter analysis: comparing and analyzing selected parameters of the target waveform data;
template comparison: determining a waveform template based on a reference waveform, and comparing and analyzing the target waveform data with the waveform template;
similarity calculation: and comparing and analyzing the waveform similarity and the peak-to-peak value based on the target waveform data.
10. The method of any one of claims 5-9, wherein the performing waveform contrast analysis on the target waveform data comprises:
under the condition that the peak value of the target waveform data is normal, carrying out normalization processing on the target waveform data to obtain normalized waveform data;
and performing curve similarity detection on the normalized waveform data, or creating a waveform template based on a reference waveform, and performing analysis detection on the normalized waveform data based on the waveform template.
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| CN202310475111.7A CN116430153A (en) | 2023-04-27 | 2023-04-27 | Aviation electric signal measuring device and method |
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