CN109839553A - A kind of EMC Design of Automatic Test System based on virtual instrument - Google Patents

A kind of EMC Design of Automatic Test System based on virtual instrument Download PDF

Info

Publication number
CN109839553A
CN109839553A CN201711198529.9A CN201711198529A CN109839553A CN 109839553 A CN109839553 A CN 109839553A CN 201711198529 A CN201711198529 A CN 201711198529A CN 109839553 A CN109839553 A CN 109839553A
Authority
CN
China
Prior art keywords
test
emc
virtual instrument
interference
instrument
Prior art date
Application number
CN201711198529.9A
Other languages
Chinese (zh)
Inventor
不公告发明人
Original Assignee
长沙闽壹湖电子科技有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 长沙闽壹湖电子科技有限责任公司 filed Critical 长沙闽壹湖电子科技有限责任公司
Priority to CN201711198529.9A priority Critical patent/CN109839553A/en
Publication of CN109839553A publication Critical patent/CN109839553A/en

Links

Abstract

The present invention relates to a kind of EMC Design of Automatic Test System based on virtual instrument, virtual instrument technology is introduced EMC testing field by the present invention, a set of EMC Auto-Test System solution based on GPIB hardware, LabVIEW graphical programming software and VISA driving API is provided, the present invention realizes the synchronization and communication between more instrument and equipments, it is automatically performed the functions such as data acquisition, transmission, processing, playback and report generation.

Description

A kind of EMC Design of Automatic Test System based on virtual instrument
Technical field
The invention patent relates to electronic design arts more particularly to a kind of EMC based on virtual instrument to test automatically System design.
Background technique
Traditional Electro Magnetic Compatibility (EMC, electromagnetic compatibility) is tested mainly by tester Manual operations is completed, and since EMC test job is generally relatively high to measuring accuracy requirement, the testing time is longer, and need to be to big The test data of amount is analyzed and processed and provides EMC Test Report, and entire test process needs to expend very big manpower and material resources; The locating high-power high-frequency rate electromagnetic radiation environment of EMC test simultaneously generates greatly harm to the health of tester. The exploitation of EMC Auto-Test System based on virtual instrument improves the Efficiency and accuracy of test job, alleviates tester The working strength of member.Due to the introducing of modern virtual instrument technology, using modular hardware and software, so that the system has The feature that development cycle is short, operational efficiency is high, while there is very strong scalability and reusability, help to reduce repeating to throw Money has very strong application value.
Patent of invention content
The invention patent relates to a kind of EMC Design of Automatic Test System based on virtual instrument, the present invention is by virtual instrument technology EMC testing field is introduced, a set of EMC based on GPIB hardware, LabVIEW graphical programming software and VISA driving API is provided Auto-Test System solution, the present invention realize the synchronization and communication between more instrument and equipments, be automatically performed data acquisition, The functions such as transmission, processing, playback and report generation.
Virtual instrument technology is introduced into EMC testing field, is provided a set of soft based on GPIB hardware, LabVIEW graphical programming The EMC Auto-Test System solution of part and VISA driving API, the present invention realize the synchronization between more instrument and equipments With communication, the functions such as data acquisition, transmission, processing, playback and report generation are automatically performed, actual test result, which reaches, to be set Meter requires, and greatly improves the efficiency, accuracy and the degree of automation of test job.
Detailed description of the invention
Fig. 1: test schematic.
Fig. 2: radiosensitivity test schematic.
Fig. 3: system software frame diagram.
Fig. 4: specific test flow chart.
Specific embodiment
In order to which the objects, technical solutions and advantages of the invention patent are more clearly understood, below in conjunction with attached drawing and implementation Example, is further elaborated the invention patent.It should be appreciated that specific embodiment described herein is only used to explain The invention patent is not intended to limit the present invention patent.
The invention patent relates to a kind of EMC Design of Automatic Test System based on virtual instrument, the present invention is by virtual instrument Technology introduces EMC testing field, provides a set of based on GPIB hardware, LabVIEW graphical programming software and VISA driving API EMC Auto-Test System solution, the present invention realizes the synchronization and communication between more instrument and equipments, is automatically performed number According to functions such as acquisition, transmission, processing, playback and report generations.
Further, EMC of the invention test includes the content of two aspects: the electromagnetism that device, equipment or system generate Emit the influence to other equipment or system function, i.e. electromagnetic interference or Electromagnetic Launching;The present apparatus, equipment or system are to it The anti-interference ability of his interference effect, i.e. electromagnetic susceptibility or electromagnetic immunity.EMI, which refers to, any may cause device, equipment Or system performance reduces or to the electromagnet phenomenon for having life or xenobiotic matter generation detrimental effect.It may be electromagnetic noise, The variation of garbage signal or communication media itself can cause equipment or system degradation or damage, but not necessarily will form it is serious after Fruit.Electromagnetic interference is made of interference source, coupling channel and 3 part of receiver, the three elements commonly referred to as interfered.According to dry The approach of propagation is disturbed, electromagnetic interference can be divided into Conduction Interference and radiation interference.Conduction Interference is the interference propagated along conductor, institute Require have a complete circuit connection between interference source and receiver with the propagation of Conduction Interference;Radiation interference is to pass through space And propagated with the characteristic of electromagnetic wave and rule, but be not that any device can radiated electromagnetic wave.Electromagnetic susceptibility or electromagnetism Immunity to interference is the index of the anti-interference ability of reaction unit, equipment or system, is indicated with level.Susceptibility level (just starts There is level when reduced performance) it is smaller, illustrate that susceptibility is higher, anti-interference ability is lower;And noise immunity level is higher, Illustrate that noise immunity is also higher, susceptibility is lower.Electromagnetic susceptibility is also classified into conducted susceptibility and radiosensitivity.It conducts quick Sensitivity refers to the noise immunity to the interference generated by power end;And radiosensitivity refers to and does to by spatial The noise immunity disturbed.It is provided according to standard, conducted susceptibility test can be divided into and radiosensitivity tests two aspects.The present invention Certain electromagnetic interference is to the effect that imposed to EUT in defined frequency range, records susceptibility threshold of the EUT under the frequency range Level curve handles EUT test data, and provides EMC test evaluation report.Design and development of the present invention is in 3 meters of methods It is carried out in semi-anechoic chamber (semi anechoic chamber), it is made of screened room and absorbing material two parts, and 5 faces are Absorbing material, ground are metal mirror, can be used as the test site EMC.
Further, conducted susceptibility of the invention test is coupled to associated electricity mainly for detection of EUT receiving The ability of signal on cable, main test equipment have signal generator, power amplifier, power meter, measuring receiver, orientation Coupler, injection probe and linear impedance stabilization network (LISN) etc., test schematic is as shown in Figure 1.Use National The GPm card control signal generator of Instruments (NI) company emits interference signal, is put signal by power amplifier Greatly, then by directional coupler it is linked into injection probe, simulation electromagnetic interference source gives EUT to apply electromagnetic interference, at the same time, and fixed The power meter connected to coupler can measure the intensity of interference signal, then induction current intensity is fed measurement by monitoring probe Test acquisition data are returned to application program by GPIB card and handled by receiver.Test content is in test starting point frequency Rate generate electric field, gradually increase the power level of input, until measuring receiver show reach standard requirements limiting level or Until EUT performance significant impacted (sensitivity), swept under desired frequency range according to rate as defined in standard and residence time Retouch, as occur it is sensitive if it needs to be determined that sensitive threshold level (under the level, EUT does not occur undesirable response just), And EUT is provided in the sensitive threshold level curve of different frequent points, data are obtained to test and are handled, EMC test is finally provided Appraisal report.
Further, radiosensitivity of the invention test is for examining EUT and related cable to bear the energy of radiated electric field Power, main test equipment have signal generator, power amplifier, power meter, transmitting receiving antenna, field intensity monitor, measurement to connect Receipts machine, directional coupler, linear impedance stabilization network (LISN) etc., test schematic is as shown in Figure 2.Equally using NI company GPIB card control signal generator emits interference signal, is amplified interference signal by power amplifier, then by radio-frequency transmissions day Line emits interference signal to EUT in the form of electromagnetic radiation, and for simulating the electromagnetic interference to EUT, field strength is visited at the same time Head feeds the electric field strength near the EUT of induction field intensity monitor, and by GPIB card will test acquisition data and return to and answer It is handled with program.
Further, test content of the invention are as follows: use amplifier appropriate and transmitting antenna, testing dot frequency Electric field is generated, the power level of input is gradually increased, until field intensity monitor shows the limiting level for reaching standard requirements, It is scanned under desired frequency range according to rate as defined in standard and residence time, and intensity level is kept to meet applicable pole Limit value, whether the performance for monitoring EUT sensitive to interference signal, as occur it is sensitive if it needs to be determined that sensitive threshold level, and provide EUT obtains data to test and handles, finally provide EMC test evaluation report in the sensitive threshold level curve of different frequent points It accuses.
Further, GPIB card of the invention is for controlling various instrument and equipments, and completes the synchronization between them and lead to Letter.Using PCMCIA-GPIB+ card of NI company, 14 GPm equipment can be at most connected, using the dedicated integrated electricity of TNT4882C The performance of IEEE 488.2 is improved to greatest extent in road;Transmission rate is up to 1-3 MB/s (IEEE 488.1 shakes hands) and 2.2 MB/s (HS488);The simple user interface of GPIB analyzer software offer, support selection acquisition, triggering and data and event are deposited Store up function.
Further, signal generator of the invention generates radiofrequency signal, is used for simulaed interference signal source, uses Rohde& The SML01 signal generator of Schwarz (RS) company, frequency range be the GHz of 9 kHz~1.1, power bracket be 1~+ 13 dBm have AM, FM internal modulation, also there is external modulation input interface.The HP8673c signal generator of Hewlett-Packard Corporation, frequency model It encloses for 50MHz-18.6 GHz, power bracket is 1 dBm of a 1o0 ~+1,2~16 GHz in 50 MHz~2 0 ghz band It is one 100 ~ -5dBm when frequency range, is one 100~+2 dBm when 16~18 5 ghz band, equally there is AM, FM internal modulation, There is external modulation input interface.
Further, power amplifier of the invention is used to the high-frequency signal that signal generator issues being enlarged into high power Interference signal, use the 100A250A power amplifier of Amplifier Research (AR) company, frequency range 10 The MHz of kHz~250, maximum power are the 3552B power amplifier of 100 W:Ailtech companies, and frequency range is 100~500 MHz, maximum power are 50 W;The 15100B power amplifier of Ailtech company, frequency range are the GHz of 500 MHz~1, most High-power is 30W.
Further, measuring receiver of the invention is that Electromagnetic Launching measures most basic equipment, and being in fact one has " spectrum analyzer " for meeting EMI measurement particular/special requirement, suitable for measuring faint continuous wave signal, in addition to harmonic current and electricity Pressure fluctuation is outer, and the test of other electromagnetic compatibility transmitting projects will nearly all use it.The ESIB26 of RS company is used, it is defeated The frequency range of inbound port 1 is the GHz of 20 Hz~26.5, and the frequency range of input port 2 is the GHz of 20 Hz~1;Has peak A variety of detecting ways such as value, quasi-peak value, average value, root mean square;With hypersensitivity, wide dynamic range, exceed loading capability, high survey Before accuracy of measurement and quickly scanning the characteristics of measurement.
Further, power meter of the invention cooperation directional coupler is used to monitor the intensity for the interference signal being actually sent out, and makes With the GT8541C of Giga-tronics company, it is equipped with GT80324 power head, frequency range is 10 MHz-40 GHz, power model It encloses for -60 ~ -30dBm.
Further, field intensity monitor of the invention cooperation field intensity probe is used to monitor the electromagnetic radiation intensity near EUT, uses The FM5004 of AR company can be imported field intensity signal to field intensity monitor by 4 isotropic field intensity probes of three axis, and same When display 4 probe readings.It using tri- axis field intensity probe of FP5000, is connect, is guaranteed using optical fiber between field intensity monitor Data transmission it is quick with it is accurate.
Further, what radio-frequency antenna of the invention was used to issue signal generator believes through the amplified interference of power amplifier Number, launched in a manner of radiation, for simulating the radiation interference to EUT, using the AT5000 of AR company, frequency range is The MHz of 10 kHz~100, maximal input be 3 000W:AT96000 and AT96001 be respectively used to the GHz of 200 MHz~1 and The ghz band of l~2.
Further, the EMC ATS software frame based on virtual instrument is the figure in NI company object-oriented Exploitation is completed under 7.0 environment of shape programming language LabVIEW, passes through the VISA (virtual for calling LabVIEW built-in Instrument system architecture) driving API, GPIB card is controlled to realize the control to various instruments, thus Complete test.VISA is built jointly by the maximum industrial instrumentation company in 35 whole world for forming VXI plug&play System Committee Vertical one is used to control the industrial standard of instrument and equipment across V Ⅺ, GPIB, Serial and other interfaces, is marked using VISA Standard, user may not necessarily consider the variation of tool interface system and software version and the incompatible situation of bring, and different company Drive software again can be compatible.
Further, present invention employs a kind of modular programmed method, i.e., each functional module is individually encapsulated At independent reusable submodule, the specific test item in upper layer can independently call these function sub-modules, realize each Kind functional test, system software frame are as shown in Figure 3.Specific testing process is as shown in Figure 4.User starts test main program, Test item is selected, corresponding software and hardware setting is then read according to test item.User can also carry out manually hardware configuration and Test parameter setting after the calibration of complete paired systems, just starts to carry out EUT susceptibility test subsequently into detection calibration program.
The above description is only a preferred embodiment of the patent of the present invention, is not intended to limit the invention patent, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the invention patent within the spirit and principle of patent of invention Protection scope within.

Claims (2)

1. the invention patent relates to a kind of EMC Design of Automatic Test System based on virtual instrument, the present invention is by virtual instrument skill Art introduces EMC testing field, provides a set of based on GPIB hardware, LabVIEW graphical programming software and VISA driving API's EMC Auto-Test System solution.
2. a kind of EMC Design of Automatic Test System based on virtual instrument according to claim 1, which is characterized in that this The synchronization and communication between more instrument and equipments are realized in invention, are automatically performed data acquisition, transmission, processing, playback, and report Functions, the actual test results such as generation reach design requirement, greatly improve efficiency, the accuracy of test job, and certainly Dynamicization degree.
CN201711198529.9A 2017-11-26 2017-11-26 A kind of EMC Design of Automatic Test System based on virtual instrument CN109839553A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711198529.9A CN109839553A (en) 2017-11-26 2017-11-26 A kind of EMC Design of Automatic Test System based on virtual instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711198529.9A CN109839553A (en) 2017-11-26 2017-11-26 A kind of EMC Design of Automatic Test System based on virtual instrument

Publications (1)

Publication Number Publication Date
CN109839553A true CN109839553A (en) 2019-06-04

Family

ID=66878695

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711198529.9A CN109839553A (en) 2017-11-26 2017-11-26 A kind of EMC Design of Automatic Test System based on virtual instrument

Country Status (1)

Country Link
CN (1) CN109839553A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2788201Y (en) * 2004-12-08 2006-06-14 比亚迪股份有限公司 Electromagnetic compatible pre-scanning analyzer
CN102033199A (en) * 2010-12-20 2011-04-27 常熟理工学院 System for testing dynamic parameter of high-speed electromagnetic valve for knitting machine
CN102749539A (en) * 2012-06-27 2012-10-24 北京航空航天大学 Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference
CN102759692A (en) * 2012-07-24 2012-10-31 广州供电局有限公司 Simulation method for detecting local discharge of switch cabinet based on virtual reality technology
CN104076214A (en) * 2014-06-11 2014-10-01 南京第五十五所技术开发有限公司 Multi-channel microwave module automatic test method
CN204330919U (en) * 2014-12-18 2015-05-13 赣州天文磁业有限公司 A kind of electromagnet characteristic test system based on LabVIEW

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2788201Y (en) * 2004-12-08 2006-06-14 比亚迪股份有限公司 Electromagnetic compatible pre-scanning analyzer
CN102033199A (en) * 2010-12-20 2011-04-27 常熟理工学院 System for testing dynamic parameter of high-speed electromagnetic valve for knitting machine
CN102749539A (en) * 2012-06-27 2012-10-24 北京航空航天大学 Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference
CN102759692A (en) * 2012-07-24 2012-10-31 广州供电局有限公司 Simulation method for detecting local discharge of switch cabinet based on virtual reality technology
CN104076214A (en) * 2014-06-11 2014-10-01 南京第五十五所技术开发有限公司 Multi-channel microwave module automatic test method
CN204330919U (en) * 2014-12-18 2015-05-13 赣州天文磁业有限公司 A kind of electromagnet characteristic test system based on LabVIEW

Similar Documents

Publication Publication Date Title
Genender et al. Simulating the multipath channel with a reverberation chamber: Application to bit error rate measurements
CN103414526B (en) The test system of a kind of wireless radio frequency index and method of testing
Karthik et al. EMI developed test methodologies for short duration noises
CN102749539B (en) Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference
Corona et al. Reverberation-chamber research-then and now: a review of early work and comparison with current understanding
US7173423B2 (en) System and methods for testing operation of a radio frequency device
US7242176B2 (en) Systems and methods for evaluating electromagnetic interference
JP2011017718A (en) Electromagnetic field distribution measuring apparatus and computer-readable recording medium
US20050176376A1 (en) Batch testing system and method for wireless communication devices
Song et al. Detection and location of multiple wiring faults via time–frequency-domain reflectometry
CN101871975B (en) System and method for testing cable transfer impedance time domain
CN103472424B (en) Detector host performance method of testing is put in the dissimilar office of injecting based on analog voltage signal
CN104267265A (en) Evaluating system and method based on radio astronomical instrument device electromagnetic radiation
CN102116808B (en) Test device for testing radiosensitivity of electric field and test method thereof
US20110032162A1 (en) Antenna testing device and antenna testing method using the same
US9594370B1 (en) Portable user interface for test instrumentation
WO2009039481A1 (en) Reconfigurable chamber for emulating multipath fading
CN102944780A (en) Testing method for shielding effectiveness of small-size shielding cavity
CN106383273B (en) Aircraft electromagnetic environment Safety Margin code method
Krauthauser On the measurement of total radiated power in uncalibrated reverberation chambers
CN101662078B (en) Small shielding body electromagnetic shielding performance testing device, system and method therefor
CN204258820U (en) A kind of Zigbee radio frequency test system
US7355413B2 (en) Testing method/arrangement measuring electromagnetic interference of noise in a to-be-tested printed circuit board
US8143903B2 (en) Resonance scanning system and method for testing equipment for electromagnetic resonances
CN103245926B (en) Efficient simulation device for partial discharge modes under various faults in high-voltage switch cabinet

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination