CN111880037A - Power line audio conduction sensitivity monitoring method, system and device - Google Patents
Power line audio conduction sensitivity monitoring method, system and device Download PDFInfo
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- CN111880037A CN111880037A CN202010785230.9A CN202010785230A CN111880037A CN 111880037 A CN111880037 A CN 111880037A CN 202010785230 A CN202010785230 A CN 202010785230A CN 111880037 A CN111880037 A CN 111880037A
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- 230000035945 sensitivity Effects 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims description 10
- 238000001228 spectrum Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 101000699762 Homo sapiens RNA 3'-terminal phosphate cyclase Proteins 0.000 description 3
- 102100029143 RNA 3'-terminal phosphate cyclase Human genes 0.000 description 3
- IWUCXVSUMQZMFG-AFCXAGJDSA-N Ribavirin Chemical compound N1=C(C(=O)N)N=CN1[C@H]1[C@H](O)[C@H](O)[C@@H](CO)O1 IWUCXVSUMQZMFG-AFCXAGJDSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
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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
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a power line audio conduction sensitivity monitoring method, which comprises the following steps: increasing signal source output signals, and detecting whether the interference intensity meets a first preset threshold value; detecting the interference intensity comprises detecting a current value and/or a voltage value in a line; if the interference intensity meets a preset threshold, scanning according to a preset rule, wherein the preset rule comprises: dwell time and scan rate; and monitoring the working state of the tested equipment. The invention can fully coordinate and utilize the existing hardware and software resources, realize the synchronous monitoring of the test voltage and current of the audio conduction sensitivity of the airborne power line, and achieve the automation and the accuracy.
Description
Technical Field
The invention relates to the technical field of aviation and electrical, in particular to a method, a system and a device for monitoring audio conduction sensitivity of a power line.
Background
With the increasing of civil airborne electronic devices, when a large number of electronic devices work simultaneously, a particularly complex electromagnetic environment is formed in the aircraft cabin. Under the environment, each electronic device is required to have strong anti-interference capability so as to ensure that the function and performance meeting the specification can be achieved during normal use.
RTCA DO-160G 'airborne equipment environmental conditions and test methods' is taken as the current domestic and foreign general civil aircraft airborne equipment test standard, and has legal efficacy in airworthiness certification of each country. The standard test object is mainly used for civil aviation airborne monomer equipment. In which the power line audio conduction sensitivity test is to determine whether equipment installed in the interior of an aircraft can tolerate harmonic frequency components, typically of the expected amplitude associated with the fundamental frequency of the power supply. The existing test software in most laboratories is configured according to the requirements of GJB 151-2013, can only monitor the injection voltage, and cannot meet the requirement of simultaneous measurement of current and voltage in the RTCA DO-160G 18 th power line audio conduction sensitivity test.
Therefore, in order to facilitate the test of whether the civil aircraft airborne equipment meets the standard of RTCA DO-160G airborne equipment environmental conditions and test method, it is necessary to synchronously monitor the test voltage and current of the airborne power line audio conduction sensitivity.
Disclosure of Invention
The invention aims to provide a method, a system and a device for monitoring the audio conduction sensitivity of a power line, which are used for realizing synchronous monitoring of test voltage and current of the audio conduction sensitivity of an airborne power line by fully coordinating and utilizing the existing hardware and software resources and achieving automation and accuracy.
To achieve the above object, an embodiment of the present invention provides a power line audio conducted sensitivity monitoring method, including:
increasing signal source output signals, and detecting whether the interference intensity meets a first preset threshold value; detecting the interference intensity comprises detecting a current value and/or a voltage value in a line;
if the interference intensity meets a preset threshold, scanning according to a preset rule, wherein the preset rule comprises: dwell time and scan rate;
and monitoring the working state of the tested equipment.
As a specific scheme, before increasing the output signal of the signal source, selecting the device under test to start testing, and setting the output level of the signal source to be a second preset threshold.
As a specific scheme, if the interference strength does not meet a preset threshold, continuing to increase the output signal of the signal source.
The embodiment of the present invention further provides a power line audio conduction sensitivity detection system, including:
the signal intensity increasing module is used for increasing the output signal of the signal source;
the interference intensity detection module is used for detecting whether the interference intensity meets a first preset threshold value or not; detecting the interference intensity comprises detecting a current value and/or a voltage value in a line;
a scanning module, configured to scan according to a preset rule if the interference strength meets a preset threshold, where the preset rule includes: dwell time and scan rate;
and the monitoring module is used for monitoring the working state of the tested equipment.
Preferably, the device further comprises a signal source setting module, which is used for selecting the device under test to start testing and setting the output level of the signal source to be a second preset threshold.
Preferably, the signal strength increasing module is further configured to continue to increase the output signal of the signal source if the interference strength does not meet a preset threshold.
The embodiment of the present invention further provides a device for monitoring audio conducted sensitivity of a power line, including: the device comprises a signal source, test equipment and tested equipment;
the signal source comprises a signal generator, a power amplifier and a coupling transformer, wherein the power amplifier and the coupling transformer are used for increasing the power of an output signal;
the test equipment comprises a spectrum analyzer and an oscilloscope; the spectrum analyzer and the oscilloscope are used for detecting interference signals; the spectrum analyzer is connected to the output end of the power supply through a current clamp; one end of the oscilloscope is connected with the isolation transformer, and the other end of the oscilloscope is connected with the tested equipment in parallel.
Preferably, the signal source, the testing device and the device under test are all in a shielded room.
A computer readable storage medium storing one or more programs, characterized in that: the one or more programs include instructions that, when executed by a computing device, cause the computing device to perform a power line audio conducted sensitivity monitoring method.
A computing device, characterized by: comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including a computer program for performing a power line audio conducted sensitivity monitoring method.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
the invention provides a power line audio conduction sensitivity monitoring method, which comprises the following steps: increasing signal source output signals, and detecting whether the interference intensity meets a first preset threshold value; detecting the interference intensity comprises detecting a current value and/or a voltage value in a line; if the interference intensity meets a preset threshold, scanning according to a preset rule, wherein the preset rule comprises: dwell time and scan rate; and monitoring the working state of the tested equipment. The invention can fully coordinate and utilize the existing hardware and software resources, realize the synchronous monitoring of the test voltage and current of the audio conduction sensitivity of the airborne power line, and achieve the automation and the accuracy.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for monitoring audio conducted sensitivity of a power line according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for monitoring audio conducted sensitivity of a power line according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a power line audio conducted sensitivity monitoring system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a power line audio conducted sensitivity monitoring apparatus according to an embodiment of the present invention;
FIG. 5 is a voltage graph monitored by a power line audio conducted sensitivity monitoring system according to an embodiment of the present invention;
fig. 6 is a current curve diagram monitored by a power line audio conducted sensitivity monitoring system according to an embodiment of 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
Please refer to fig. 1 and fig. 2.
One embodiment of the present invention provides a method for monitoring audio conducted sensitivity of a power line, including:
step S101, increasing output signals of a signal source, and detecting whether the interference intensity meets a first preset threshold value; detecting the interference intensity comprises detecting a current value and/or a voltage value in a line;
step S201, if the interference strength satisfies a preset threshold, scanning according to a preset rule, where the preset rule includes: dwell time and scan rate;
step S301, monitoring the working state of the tested equipment.
As a specific scheme, the method further comprises the following steps:
and S001, selecting the tested equipment to start testing before increasing the output signal of the signal source, and setting the output level of the signal source as a second preset threshold.
As a specific scheme, the method also comprises
Step S202, if the interference strength does not meet the preset threshold, the output signal of the signal source is continuously increased.
Please refer to fig. 3.
The embodiment of the present invention further provides a power line audio conduction sensitivity detection system, including:
a signal strength increasing module 10, configured to increase an output signal of a signal source;
an interference strength detection module 20, configured to detect whether the interference strength meets a first preset threshold; detecting the interference intensity comprises detecting a current value and/or a voltage value in a line;
a scanning module 30, configured to scan according to a preset rule if the interference strength meets a preset threshold, where the preset rule includes: dwell time and scan rate;
and the monitoring module 40 is used for monitoring the working state of the tested equipment.
Preferably, the testing device further comprises a signal source setting module 50, configured to select the device under test to start testing, and set the output level of the signal source to be a second preset threshold.
Preferably, the signal strength increasing module 10 is further configured to continue to increase the output signal of the signal source if the interference strength does not meet a preset threshold.
Please refer to fig. 4.
The embodiment of the present invention further provides a device for monitoring audio conducted sensitivity of a power line, including: a signal source 100, a test apparatus 200 and a device under test 300;
the signal source 100 comprises a signal generator 110, a power amplifier 120 and a coupling transformer 130, wherein the power amplifier 120 and the coupling transformer 130 are used for increasing the output signal power;
the test apparatus 200 comprises a spectrum analyzer 210 and an oscilloscope 220; the spectrum analyzer 210 and the oscilloscope 220 are used for detecting interference signals; the spectrum analyzer 210 is connected to the power output end through a current clamp; one end of the oscilloscope 220 is connected to the isolation transformer 221, and the other end is connected in parallel to the device under test 300.
Preferably, the signal source 100, the testing device 200 and the device under test 300 are all in a shielded room.
In one embodiment, the requirements of an RTCADO-160G chapter 18 power line audio conduction sensitivity test on a monitoring method and a monitoring amount are analyzed, the existing monitoring method is analyzed and researched, the existing hardware and software resources are fully coordinated and utilized, all monitoring items required in the standard are realized, and the method achieves automation and accuracy, and has operability and popularization.
In one embodiment, signal generator 110 is a function signal generator, power amplifier 120 is an audio power amplifier, and oscilloscope 220 is a digital oscilloscope. The on-duty signal generator generates a frequency signal required by a standard in a test, the frequency signal is amplified by the audio power amplifier and then transmitted to the coupling transformer, and then the interference signal is coupled to a power line of the tested equipment. In the test, the signal frequency needs to be adjusted to achieve the effect of frequency sweep test. Meanwhile, the voltage intensity of the interference signal applied to the power line of the tested equipment is monitored through the digital oscilloscope, so that the voltage intensity is always kept within a standard requirement range.
In one embodiment, step a, the oscilloscope 220 and the spectrum analyzer 210 are powered on to warm up and reach a steady state of operation; step b, the tested device 300 is electrified for preheating and reaches a stable working state, and a power line is selected for testing; step c, adjusting the signal generator 110 to the lowest test frequency, and increasing the signal level until the requirement of a limit value is met, or the monitored current reaches the upper limit specified by a standard; and d, keeping the signal level not lower than the required signal level, and simultaneously determining the compliance with the use specification of the equipment performance. Scanning within the test frequency range according to the specified dwell time and scanning rate; and e, repeating the steps c and d for other tested power lines respectively.
As shown in fig. 5 and 6.
In one embodiment, the present invention is used to perform RTCADO-160G chapter 18 power line audio conduction sensitivity test, resulting in a voltage monitoring graph as shown in fig. 5 and a current monitoring graph as shown in fig. 6, respectively.
A computer readable storage medium storing one or more programs, characterized in that: the one or more programs include instructions that, when executed by a computing device, cause the computing device to perform a power line audio conducted sensitivity monitoring method.
A computing device, characterized by: comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including a computer program for performing a power line audio conducted sensitivity monitoring method.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A power line audio conduction sensitivity detection method is characterized by comprising the following steps:
increasing signal source output signals, and detecting whether the interference intensity meets a first preset threshold value; detecting the interference intensity comprises detecting a current value and/or a voltage value in a line;
if the interference intensity meets a preset threshold, scanning according to a preset rule, wherein the preset rule comprises: dwell time and scan rate;
and monitoring the working state of the tested equipment.
2. The method of claim 1, further comprising selecting the device under test to begin testing and setting the output level of the signal source to a second predetermined threshold before increasing the output signal of the signal source.
3. The method as claimed in claim 1, further comprising increasing the output signal of the signal source if the interference level does not satisfy a predetermined threshold.
4. A power line audio conducted sensitivity detection system, comprising:
the signal intensity increasing module is used for increasing the output signal of the signal source;
the interference intensity detection module is used for detecting whether the interference intensity meets a first preset threshold value or not; detecting the interference intensity comprises detecting a current value and/or a voltage value in a line;
a scanning module, configured to scan according to a preset rule if the interference strength meets a preset threshold, where the preset rule includes: dwell time and scan rate;
and the monitoring module is used for monitoring the working state of the tested equipment.
5. The power line audio conducted sensitivity detection system of claim 4, further comprising:
and the signal source setting module is used for selecting the tested equipment to start testing and setting the output level of the signal source as a second preset threshold value.
6. The power line audio conduction sensitivity detection system of claim 4, wherein the signal strength increasing module is further configured to continue increasing the output signal of the signal source if the interference strength does not satisfy a predetermined threshold.
7. A power line audio conducted sensitivity monitoring device, comprising:
the device comprises a signal source, test equipment and tested equipment;
the signal source comprises a signal generator, a power amplifier and a coupling transformer, wherein the power amplifier and the coupling transformer are used for increasing the power of an output signal;
the test equipment comprises a spectrum analyzer and an oscilloscope; the spectrum analyzer and the oscilloscope are used for detecting interference signals; the spectrum analyzer is connected to the output end of the power supply through a current clamp; one end of the oscilloscope is connected with the isolation transformer, and the other end of the oscilloscope is connected with the tested equipment in parallel.
8. The power line audio conduction sensitivity detection apparatus of claim 7, wherein the signal source, the test device and the device under test are all in a shielded room.
9. A computer readable storage medium storing one or more programs, characterized in that: the one or more programs include instructions that, when executed by a computing device, cause the computing device to perform the method of claims 1-3.
10. A computing device, characterized by: comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising a computer program for performing the method of claims 1-3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010785230.9A CN111880037A (en) | 2020-08-06 | 2020-08-06 | Power line audio conduction sensitivity monitoring method, system and device |
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| CN202010785230.9A CN111880037A (en) | 2020-08-06 | 2020-08-06 | Power line audio conduction sensitivity monitoring method, system and device |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376688A (en) * | 2015-11-24 | 2016-03-02 | 深圳市航电技术研究院 | Power line audio conduction sensitivity testing mode switching device for airborne equipment |
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2020
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376688A (en) * | 2015-11-24 | 2016-03-02 | 深圳市航电技术研究院 | Power line audio conduction sensitivity testing mode switching device for airborne equipment |
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Address after: 710075 floor 1, 2 and 3, complex building, No.9 zaozitai Road, new industrial park, high tech Zone, Xi'an City, Shaanxi Province Applicant after: GRG METROLOGY & TEST (XI'AN) CO.,LTD. Applicant after: Radio and TV Measurement and Testing Group Co.,Ltd. Address before: 710075 floor 1, 2 and 3, complex building, No.9 zaozitai Road, new industrial park, high tech Zone, Xi'an City, Shaanxi Province Applicant before: GRG METROLOGY & TEST (XI'AN) CO.,LTD. Applicant before: GUANGZHOU GRG METROLOGY & TEST Co.,Ltd. |
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