CN101806833A - Multi-channel frequency response analysis system and method thereof - Google Patents
Multi-channel frequency response analysis system and method thereof Download PDFInfo
- Publication number
- CN101806833A CN101806833A CN 201010119247 CN201010119247A CN101806833A CN 101806833 A CN101806833 A CN 101806833A CN 201010119247 CN201010119247 CN 201010119247 CN 201010119247 A CN201010119247 A CN 201010119247A CN 101806833 A CN101806833 A CN 101806833A
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- channel
- data
- instrument
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a multi-channel frequency response analysis system and a method thereof. The system comprises an actuating signal generation module [1], data acquisition modules [2], a system controller module [3], an instrument control bus [4], an actuating signal wiring unit [5] and a measuring signal wiring unit [6], wherein the actuating signal generation module [1] is an instrument module of any-waveform generator; the data acquisition modules [2] are a plurality of multi-channel parallel data acquiring instrument modules or a plurality of multi-channel digitalized instrument modules; the system controller module [3] communicates with the actuating signal generation module [1] and the data acquisition modules [2] through the instrument control bus [4] of a case backboard or a bottom board; a signal of the actuating signal generation module [1] is output by the actuating signal wiring unit [5]; and an external measuring signal accesses the data acquisition modules [2] through the measuring signal wiring unit [6]. The invention has the advantages of more measuring channels, compact structure, strong data processing capacity, high test precision and favorable expansibility and tailorability.
Description
Technical field
The invention belongs to the observation and control technology field, relate to a kind of multi-channel frequency response analysis system and method thereof.
Background technology
In the engineering test, the measurement of frequency response characteristic is an important test.When carrying out the measurement of system frequency response characteristic, need apply sinusoidal excitation signal to the system under test (SUT) input, the output response signal of while acquisition and recording system under test (SUT), when system under test (SUT) is in steady state (SS), the amplitude and the phase place that compare output response signal and input signal, obtain the amplitude gain and the phase relation of current Frequency point, change the frequency of pumping signal, just can obtain the amplitude versus frequency characte of a Frequency point and the Frequency Response that phase-frequency characteristic is formed.
At present, in the measurement of frequency response characteristic, usually use based on the frequency response analyzer of correlation analysis technology or based on the dynamic signal analyzer of fast fourier transform (FFT) technology, these instruments belong to the second generation intelligent testing equipment of being furnished with gpib interface, itself provide perfect measurement function.Owing to be subjected to the restriction of instrument configuration itself, can only finish the measurement of a small amount of passage, as HP3562A dynamic signal analyzer, TD1250 frequency response analyzer etc., dispose two and measure passage, once can only finish measurement to single input and single output system frequency response characteristic; In addition,, be difficult to finish complicated data processing task, fit transport function, set up system mathematic model as the frequency of utilization response data because instrument itself does not have data processing function.
Along with the development of instrument bus technology such as VXI, PXI, LXI, CPCI, because it has data transmission rate height, big, the high reliability features of capacity, therefore, the condition of developing multi-channel frequency response characteristic test analytic system is ripe.
Summary of the invention
Purpose of the present invention: design a kind of based on instrument control bus, hyperchannel, data processing function frequency response analysis system and analytical approach thereof strong, easily expansion.
Technical scheme of the present invention is: a kind of multi-channel frequency response analysis system, comprise pumping signal generation module 1, data acquisition module 2 and system controller module 3, instrument control bus 4, excitation signal connection unit 5 and measuring-signal wiring units 6, wherein, pumping signal generation module 1 is the AWG (Arbitrary Waveform Generator) instrument module, and data acquisition module 2 is polylith, multi-channel parallel data acquisition instrument module or polylith, multichannel digital instrument instrument module; System controller module 3 is by the instrument control bus 4 and pumping signal generation module 1 and data acquisition module 2 communications of cabinet backboard or base plate; Pumping signal generation module 1 signal is by 5 outputs of excitation signal connection unit, and externally measured signal is linked into data acquisition module 2 by measuring-signal wiring units 6.
Described system controller module 3 inserts with pumping signal generation module 1 and data acquisition module 2 and is installed in the cabinet of being furnished with instrument control bus 4, the transmission and the exchanges data that link together and finish control signal by instrument control bus 4.
The output signal of described pumping signal generation module 1 as the input signal of system under test (SUT), inserts system under test (SUT) by excitation signal connection unit 5; The response output signal of system under test (SUT) is linked into data acquisition module 2 by measuring-signal wiring units 6.
PXI, the VXI that described instrument control bus 4 is standards, GPIB, Serial or PC_DAQ instrument control bus.
Described excitation signal connection unit 5 and measuring-signal wiring units 6 are different according to signal type, can select contact hole forms such as plain bore, coaxial aperture, multicore aviation connector for use.
A kind of multi-channel frequency response analytical approach is provided simultaneously, it is characterized in that, control the operation of pumping signal generation module and data acquisition module by the instrument control bus of cabinet backboard or base plate by system controller module, by pumping signal generation module output frequency sweep sinusoidal excitation signal, finish collection to outside measuring-signal by data acquisition module.May further comprise the steps:
(1) parameter such as the kind of the output signal that sets according to system controller module of pumping signal generation module, amplitude, frequency is exported corresponding pumping signal;
(2) parameters such as the acquisition channel that sets according to system controller module of data acquisition module, sampling rate, sample mode, data transmission storage mode are gathered respective input signals.
(3) system controller module is from first acquisition channel of data acquisition module, storage mode according to image data, search the starting point and the end point of the data signal waveforms of current acquisition channel, obtain the complete Wave data of input signal of current acquisition channel correspondence.
(4) current acquisition channel complete waveform data and excitation signal waveforms data are carried out the correlation analysis computing, obtain amplitude gain and the phase gain of input signal under current frequency of current acquisition channel correspondence; Or adopt the method for fast fourier transform, calculate amplitude gain and the phase gain of input signal under current frequency of current acquisition channel correspondence.
(5) repeating step (3) and step (4) continue the data processing of next acquisition channel, obtain the amplitude gain and the phase gain of its corresponding input signal, up to finishing amplitude gain and the phase gain of all input signals under set frequency.
(6) frequency of change pumping signal, repeating step (1)～step (5), and calculate under the corresponding current frequency amplitude gain of all input signals and phase gain, thereby obtain the amplitude versus frequency characte and the phase-frequency characteristic of all input signals in the whole swept frequency range, finish the multi-channel frequency response analysis.
The present invention has the following advantages:
(1) because configure dedicated high performance system controller module and Other Instruments module make system have powerful data processing function, the measuring accuracy height.
(2) the standard PC case and the instrument module based on the instrument control bus of employing high reliability, compact conformation, reliable operation can adapt at harsh electromagnetism and mechanical environment and use.
(3) good extensibility and tailorability.By increasing digitized instrument module or parallel data acquisition instrument module, increase corresponding measuring-signal wiring units and cable thereof, just can finish the expansion of measuring passage easily; Can match the Other Instruments module as required, realize the unitization combination of system.
(4) reduce cost.Owing to realized General design, same system can carry out multiple channel test, is equivalent to the function of original a plurality of specialized equipments on function, greatly reduces equipment cost; Concerning the user, because multichannel frequency response analysis has improved experimental test efficient greatly, shortened the test period, significantly reduced expense.
Description of drawings
Fig. 1 forms structural drawing for the present invention;
Fig. 2 is the composition structural drawing of one embodiment of the invention;
Fig. 3 is the software flow pattern of the invention process method.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
Multi-channel frequency response analysis system is formed structure as shown in Figure 1, comprise pumping signal generation module 1, data acquisition module 2 and system controller module 3, system controller module 3 inserts with pumping signal generation module 1 and data acquisition module 2 and is installed in the cabinet (not drawing among the figure) of being furnished with instrument control bus 4, the transmission and the exchanges data that link together and finish control signal by instrument control bus 4, it is characterized in that, pumping signal generation module 1 is the AWG (Arbitrary Waveform Generator) instrument module, data acquisition module 2 is a polylith, multi-channel parallel data acquisition instrument module or polylith, multichannel digital instrument instrument module, and include excitation signal connection unit 5 and measuring-signal wiring units 6, system controller module 3 is by the instrument control bus 4 and 1 communication of pumping signal generation module of cabinet backboard or base plate, and with data acquisition module 2 communications, pumping signal generation module 1 output signal links to each other with system under test (SUT) by excitation signal connection unit 5, input signal as system under test (SUT), the response output signal of system under test (SUT) is linked into data acquisition module 2 by measuring-signal wiring units 6.
Excitation signal connection unit 5 and measuring-signal wiring units 6 are different according to signal type, can select the diverse contact hole form such as coaxial aperture, multicore aviation connector of plain bore, micro coaxle hole, the BNC connector of banana plug for use, represent which kind of signal to carry out electric regulation to each contact hole simultaneously, so that carry out general electric and mechanical splice with the tested system in outside.
Fig. 2 is the composition structural drawing of one embodiment of the invention.
Among the embodiment, employing is based on the system of VXI instrument control bus, both instrument control bus 4 was vxi bus of standard, the Other Instruments module all is based on vxi bus, insertion is installed among the 4 groove VXI cabinet E8408A, pumping signal generation module 1 is an E1441A AWG (Arbitrary Waveform Generator) instrument module, data acquisition module 2 is an E1432A digitizer instrument module, system controller module 3 adopts the control mode of general external computing machine, disposes 0 greeve controller instrument module E8491A of VXI instrument control bus and general business computer or industrial computer.
In the present embodiment, the realization of vxi bus test macro function is to finish by the communication between controller module 3 and the Other Instruments module 1,2, to Other Instruments module 1,2 transmitting control commands and command parameters, and receive responsive state or the data message that returns by instrument module 1,2 by controller module 3; Here, general external computing machine is finished by 0 greeve controller module the control of E1441A AWG (Arbitrary Waveform Generator) instrument module and E1432A digitizer instrument module, carry out communication by the IEEE-1394 data bus between external computing machine and the 0 greeve controller module, finish communication by vxi bus between 0 greeve controller module and E1441A AWG (Arbitrary Waveform Generator) instrument module and the E1432A digitizer instrument module.
External computer realization man machine interface's function, people-machine operation interface is provided, accept the parameter etc. of channel selecting, swept frequency excitation signal parameter and Frequency Response Analysis of user's operation input, transmitting control commands to 0 greeve controller module so that control each instrument module, on the other hand, external computing machine is video data information such as graph curve as a result also, and output hyperchannel Frequency Response Analysis measurement result is provided.
Above-mentioned feature of the present invention can be done following variation, but they all do not depart from essence of the present invention.Adopt outside the vxi bus as the instrument control bus, also can select the instrument control bus of other type, as PXI, LXI, PCI, CPCI etc.;
Instrument module also can be selected the instrument module of other type except that the E1441A, the E1432A that select based on vxi bus, as the AWG (Arbitrary Waveform Generator) module of PXI bus, parallel data acquisition module etc.;
The AWG (Arbitrary Waveform Generator) module also can be selected the 1D4 signal source option that matches with E1432A digitizer module, as the swept-frequency signal driving source except that selecting independent E1441A instrument module.
Fig. 3 is the software flow pattern of the invention process method.
In the present embodiment, the multi-channel frequency response analysis test method may further comprise the steps:
Claims (7)
1. multi-channel frequency response analysis system, comprise pumping signal generation module [1], data acquisition module [2] and system controller module [3], instrument control bus [4], excitation signal connection unit [5] and measuring-signal wiring units [6], it is characterized in that, pumping signal generation module [1] is the AWG (Arbitrary Waveform Generator) instrument module, and data acquisition module [2] is polylith, multi-channel parallel data acquisition instrument module or polylith, multichannel digital instrument instrument module; System controller module [3] is by the instrument control bus [4] and pumping signal generation module [1] and data acquisition module [2] communication of cabinet backboard or base plate; Pumping signal generation module [1] signal is by excitation signal connection unit [5] output, and externally measured signal is linked into data acquisition module [2] by measuring-signal wiring units [6].
2. multi-channel frequency response analysis system as claimed in claim 1, it is characterized in that, described system controller module [3] and pumping signal generation module [1] and data acquisition module [2] insertion are installed in the cabinet of being furnished with instrument control bus [4], the transmission and the exchanges data that link together and finish control signal by instrument control bus [4].
3. as claim 1 or the described multi-channel frequency response analysis system of claim 2, it is characterized in that the output signal of pumping signal generation module [1] as the input signal of system under test (SUT), inserts system under test (SUT) by excitation signal connection unit [5]; The response output signal of system under test (SUT) is linked into data acquisition module [2] by measuring-signal wiring units [6].
4. a kind of multi-channel frequency response analysis system according to claim 1 is characterized in that, instrument control bus [4] is PXI, VXI, GPIB, Serial or the PC_DAQ instrument control bus of standard.
5. a kind of multi-channel frequency response analysis system according to claim 1, it is characterized in that, excitation signal connection unit [5] and measuring-signal wiring units [6] are different according to signal type, can select contact hole forms such as plain bore, coaxial aperture, multicore aviation connector for use.
6. multi-channel frequency response analytical approach, it is characterized in that, control the operation of pumping signal generation module and data acquisition module by the instrument control bus of cabinet backboard or base plate by system controller module, by pumping signal generation module output frequency sweep sinusoidal excitation signal, finish collection to outside measuring-signal by data acquisition module.
7. multi-channel frequency response analytical approach according to claim 6, its step comprises:
(1) parameter such as the kind of the output signal that sets according to system controller module of pumping signal generation module, amplitude, frequency is exported corresponding pumping signal;
(2) parameters such as the acquisition channel that sets according to system controller module of data acquisition module, sampling rate, sample mode, data transmission storage mode are gathered respective input signals.
(3) system controller module is from first acquisition channel of data acquisition module, storage mode according to image data, search the starting point and the end point of the data signal waveforms of current acquisition channel, obtain the complete Wave data of input signal of current acquisition channel correspondence.
(4) current acquisition channel complete waveform data and excitation signal waveforms data are carried out the correlation analysis computing, obtain amplitude gain and the phase gain of input signal under current frequency of current acquisition channel correspondence; Or adopt the method for fast fourier transform, calculate amplitude gain and the phase gain of input signal under current frequency of current acquisition channel correspondence.
(5) repeating step (3) and step (4) continue the data processing of next acquisition channel, obtain the amplitude gain and the phase gain of its corresponding input signal, up to finishing amplitude gain and the phase gain of all input signals under set frequency.
(6) frequency of change pumping signal, repeating step (1)～step (5), and calculate under the corresponding current frequency amplitude gain of all input signals and phase gain, thereby obtain the amplitude versus frequency characte and the phase-frequency characteristic of all input signals in the whole swept frequency range, finish the multi-channel frequency response analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010119247 CN101806833A (en) | 2010-03-08 | 2010-03-08 | Multi-channel frequency response analysis system and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010119247 CN101806833A (en) | 2010-03-08 | 2010-03-08 | Multi-channel frequency response analysis system and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101806833A true CN101806833A (en) | 2010-08-18 |
Family
ID=42608717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010119247 Pending CN101806833A (en) | 2010-03-08 | 2010-03-08 | Multi-channel frequency response analysis system and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101806833A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523133A (en) * | 2011-12-07 | 2012-06-27 | 中国航空无线电电子研究所 | Automatic test equipment of performance parameter of multiplex data transmission bus and test method |
| CN103149228A (en) * | 2013-03-17 | 2013-06-12 | 中国科学院苏州纳米技术与纳米仿生研究所 | Method for improving atomic number contrast picture quality in scanning transmission electron microscope |
| CN104656631A (en) * | 2013-11-22 | 2015-05-27 | 中国航空工业集团公司西安飞机设计研究所 | Distributed frequency response characteristic measuring and analyzing system |
| CN104681987A (en) * | 2013-11-28 | 2015-06-03 | 中国航空工业集团公司雷华电子技术研究所 | Multi-frequency point phase distribution method for radar antenna array elements |
| CN104678169A (en) * | 2014-08-25 | 2015-06-03 | 北京天高智机技术开发公司 | PCI (peripheral component interconnect) bus-based frequency characteristic testing device and PCI bus-based frequency characteristic testing method |
| CN104698307A (en) * | 2014-10-13 | 2015-06-10 | 北京天高智机技术开发公司 | PXI (PCI extensions for instrumentation) bus-based frequency characteristic testing device and method |
| CN104980043A (en) * | 2014-04-03 | 2015-10-14 | 台达电子企业管理（上海）有限公司 | Power converter and power converter frequency characteristic testing and adjusting method |
| CN106066636A (en) * | 2015-04-24 | 2016-11-02 | 发那科株式会社 | There is the Servocontrol device of the function of the online frequency characteristic obtaining machinery |
| CN106680584A (en) * | 2016-11-11 | 2017-05-17 | 中国科学院长春光学精密机械与物理研究所 | All-digital portable spectrum analysis system |
| CN108036841A (en) * | 2017-11-30 | 2018-05-15 | 四川泛华航空仪表电器有限公司 | The test device and test method of adjustable error mass flowmenter |
| CN108107394A (en) * | 2017-12-20 | 2018-06-01 | 福建利利普光电科技有限公司 | Multiple-channel digital oscilloscope bandwidth flatness and consistency detecting method and its system |
| CN109490415A (en) * | 2018-11-30 | 2019-03-19 | 南京江淳机电装备科技有限公司 | A kind of pipe detection system of the multi-channel parallel excitation and acquisition of multi-frequency switching |
| CN109508511A (en) * | 2018-12-24 | 2019-03-22 | 中国航空工业集团公司西安飞机设计研究所 | Frequency sweeping method in frequency response analysis measurement |
| CN109634261A (en) * | 2018-12-24 | 2019-04-16 | 中国航空工业集团公司西安飞机设计研究所 | Automatic identification pilot system state and the system and method tested |
| CN110006326A (en) * | 2019-03-11 | 2019-07-12 | 国网江苏省电力有限公司淮安供电分公司 | A kind of deformation of transformer winding intelligent detecting method based on Frequency Response Analysis FRA |
| CN111983305A (en) * | 2020-07-29 | 2020-11-24 | 普源精电科技股份有限公司 | Frequency response test method |
| CN114660979A (en) * | 2022-05-25 | 2022-06-24 | 南京宏泰半导体科技有限公司 | Multichannel shared bandwidth arbitrary signal generating and collecting device |
-
2010
- 2010-03-08 CN CN 201010119247 patent/CN101806833A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 《洛阳理工学院学报(自然科学版)》 20090930 石军 "一种基于LabVIEW的频率响应分析仪设计" 第35-37页 1-7 第19卷, 第3期 2 * |
| 《测控技术》 20040131 支超有等 "基于VXI总线的多通道频率响应测量与系统建模" 第11-13页 1-7 第23卷, 第1期 2 * |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523133A (en) * | 2011-12-07 | 2012-06-27 | 中国航空无线电电子研究所 | Automatic test equipment of performance parameter of multiplex data transmission bus and test method |
| CN103149228A (en) * | 2013-03-17 | 2013-06-12 | 中国科学院苏州纳米技术与纳米仿生研究所 | Method for improving atomic number contrast picture quality in scanning transmission electron microscope |
| CN104656631A (en) * | 2013-11-22 | 2015-05-27 | 中国航空工业集团公司西安飞机设计研究所 | Distributed frequency response characteristic measuring and analyzing system |
| CN104681987A (en) * | 2013-11-28 | 2015-06-03 | 中国航空工业集团公司雷华电子技术研究所 | Multi-frequency point phase distribution method for radar antenna array elements |
| CN104681987B (en) * | 2013-11-28 | 2018-01-12 | 中国航空工业集团公司雷华电子技术研究所 | A kind of radar antenna array element multifrequency point matches somebody with somebody phase method |
| CN104980043B (en) * | 2014-04-03 | 2017-11-24 | 台达电子企业管理（上海）有限公司 | The frequency characteristic test and adjusting method of power inverter and the power inverter |
| CN104980043A (en) * | 2014-04-03 | 2015-10-14 | 台达电子企业管理（上海）有限公司 | Power converter and power converter frequency characteristic testing and adjusting method |
| CN104678169A (en) * | 2014-08-25 | 2015-06-03 | 北京天高智机技术开发公司 | PCI (peripheral component interconnect) bus-based frequency characteristic testing device and PCI bus-based frequency characteristic testing method |
| CN104678169B (en) * | 2014-08-25 | 2018-08-31 | 北京天高智机技术开发公司 | A kind of frequency characteristic test device and method based on pci bus |
| CN104698307B (en) * | 2014-10-13 | 2018-05-22 | 北京天高智机技术开发公司 | A kind of frequency characteristic test apparatus and method based on PXI buses |
| CN104698307A (en) * | 2014-10-13 | 2015-06-10 | 北京天高智机技术开发公司 | PXI (PCI extensions for instrumentation) bus-based frequency characteristic testing device and method |
| CN106066636A (en) * | 2015-04-24 | 2016-11-02 | 发那科株式会社 | There is the Servocontrol device of the function of the online frequency characteristic obtaining machinery |
| US10025296B2 (en) | 2015-04-24 | 2018-07-17 | Fanuc Corporation | Servo control apparatus having function of obtaining frequency characteristics of machine on line |
| CN106066636B (en) * | 2015-04-24 | 2018-10-23 | 发那科株式会社 | Have the function of obtaining the Servocontrol device of the frequency characteristic of machinery online |
| CN106680584A (en) * | 2016-11-11 | 2017-05-17 | 中国科学院长春光学精密机械与物理研究所 | All-digital portable spectrum analysis system |
| CN108036841A (en) * | 2017-11-30 | 2018-05-15 | 四川泛华航空仪表电器有限公司 | The test device and test method of adjustable error mass flowmenter |
| CN108036841B (en) * | 2017-11-30 | 2021-02-05 | 四川泛华航空仪表电器有限公司 | Testing device and testing method for error-adjustable mass flowmeter |
| CN108107394B (en) * | 2017-12-20 | 2020-07-07 | 福建利利普光电科技有限公司 | Method and system for detecting flatness and consistency of bandwidth of multi-channel digital oscilloscope |
| CN108107394A (en) * | 2017-12-20 | 2018-06-01 | 福建利利普光电科技有限公司 | Multiple-channel digital oscilloscope bandwidth flatness and consistency detecting method and its system |
| CN109490415A (en) * | 2018-11-30 | 2019-03-19 | 南京江淳机电装备科技有限公司 | A kind of pipe detection system of the multi-channel parallel excitation and acquisition of multi-frequency switching |
| CN109508511A (en) * | 2018-12-24 | 2019-03-22 | 中国航空工业集团公司西安飞机设计研究所 | Frequency sweeping method in frequency response analysis measurement |
| CN109634261A (en) * | 2018-12-24 | 2019-04-16 | 中国航空工业集团公司西安飞机设计研究所 | Automatic identification pilot system state and the system and method tested |
| CN109634261B (en) * | 2018-12-24 | 2021-09-14 | 中国航空工业集团公司西安飞机设计研究所 | System and method for automatically identifying and testing state of test system |
| CN110006326A (en) * | 2019-03-11 | 2019-07-12 | 国网江苏省电力有限公司淮安供电分公司 | A kind of deformation of transformer winding intelligent detecting method based on Frequency Response Analysis FRA |
| CN111983305A (en) * | 2020-07-29 | 2020-11-24 | 普源精电科技股份有限公司 | Frequency response test method |
| CN114660979A (en) * | 2022-05-25 | 2022-06-24 | 南京宏泰半导体科技有限公司 | Multichannel shared bandwidth arbitrary signal generating and collecting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101806833A (en) | Multi-channel frequency response analysis system and method thereof | |
| KR101264120B1 (en) | Obtaining test data for a device | |
| CN101674520B (en) | Method and device for analyzing and testing parameter of vibration type pickup | |
| CN102419389B (en) | Time domain measurement in test and sensing device | |
| CN102749604B (en) | Testing apparatus automatic calibrator, calibration system and calibration steps | |
| CN101629995A (en) | Detection method of phasor measurement unit PMU | |
| CN110020452B (en) | Electromagnetic compatibility test simulation analysis method and system thereof | |
| CN202794491U (en) | Test equipment automatic calibration instrument and calibration system | |
| US6966019B2 (en) | Instrument initiated communication for automatic test equipment | |
| CN101770005A (en) | DC electronic transformer calibration device and method | |
| CN103941119B (en) | A kind of multifunction programable signal generation parameter test system | |
| CN105929258A (en) | Transformer substation starting test wireless nuclear phase debugging method | |
| US20210215750A1 (en) | Method and system for fault detection | |
| CN101832813A (en) | Noise and Vibration-Measuring System based on virtual instrument technique | |
| US20140375346A1 (en) | Test control device and method for testing signal integrities of electronic product | |
| CN104155044A (en) | Measuring device and measuring method for cable force of cable-stayed bridge based on mobile terminal | |
| CN103995202B (en) | A kind of automatic signal method of testing, Apparatus and system | |
| EP2771705A1 (en) | Programmable test instrument | |
| CN117434421A (en) | Test board card, test board card tool and board card test method | |
| CN109901055A (en) | A kind of OBD equipment performance test macro | |
| CN101655522B (en) | Method for realizing impedance matching of electromagnetic immunity filter and corresponding measuring system | |
| CN106990376A (en) | A kind of test device and method of testing of scramble testing system line loss | |
| CN102109552B (en) | High-frequency and high-speed frequency testing system and method based on phase locking technique | |
| KR20220042984A (en) | Automated testing machine with data processing function and information processing method thereof | |
| CN105092968A (en) | Test method for realizing chip frequency measurement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100818 |