CN102628899A - Three-degree-of-freedom electromagnetic interference automatic test device and method - Google Patents
Three-degree-of-freedom electromagnetic interference automatic test device and method Download PDFInfo
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- CN102628899A CN102628899A CN2012100775129A CN201210077512A CN102628899A CN 102628899 A CN102628899 A CN 102628899A CN 2012100775129 A CN2012100775129 A CN 2012100775129A CN 201210077512 A CN201210077512 A CN 201210077512A CN 102628899 A CN102628899 A CN 102628899A
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Abstract
The invention provides a three-degree-of-freedom electromagnetic interference automatic test device and a three-degree-of-freedom electromagnetic interference automatic test method. The device comprises a three-degree-of-freedom platform, a computer and a data acquisition and processing unit. The method comprises the following steps: establishing a three-degree-of-freedom supporting platform; fixing an electromagnetic interference test instrument on an X-axis supporting rod; connecting a PX1 data acquisition card with the electromagnetic interference test instrument; connecting a PCI-7344 control card with a motor control unit; setting the limit positions of the X axis, the Y axis and the Z axis; after the test starts, powering on and preheating the tested equipment; initializing the three-degree-of-freedom test device; changing the position of the electromagnetic interference test instrument according to the sequence of the X axis, the Y axis and the Z axis; transmitting the test data of the electromagnetic interference test instrument to the PX1 data acquisition card through a PXI bus; and transmitting the test result to a frequency spectrum analysis unit of the computer. Due to the device and the method, three motors are controlled by LabVIEW software, so that automation of the electromagnetic interference test is realized, the test time and the test cost are saved, and the test accuracy is improved.
Description
Technical field
What the present invention relates to is the electronic product field tests, particularly relates to a kind of Three Degree Of Freedom electromagnetic interference (EMI) automatic testing equipment and method.
Background technology
EMC (electromagnetic compatibility, EleetroMagnetic capability) is meant the ability that electronic equipment and system still can coordinate, carry out work effectively in various electromagnetic environments.Electromagnetic interference (EMI) is the electromagnetic change phenomenon harmful to the electronic device works performance.Electromagnetic interference (EMI) not only influences the operate as normal of electronic equipment, even causes some the element infringement in the electronic equipment.Therefore the electromagnetic interference (EMI) that electronic equipment is produced will give sufficient attention.Should note electronic equipment not receive on every side electromagnetic interference (EMI) and can operate as normal, note again electronic equipment itself not to around other equipment produce electromagnetic interference (EMI), influence other equipment and normally move.
In order to ensure the correctness and the reliability of electronic device design, particularly modern military project communication products, electromagnetic compatibility problem is through each stage of product development.Along with product structure becomes increasingly complex, and the requirement and the high-frequency demand of digitizing, miniaturization, lightness, make that electromagnetic interference problem is more and more sharp-pointed; In order to ensure its Electro Magnetic Compatibility, Electromagnetic Interference Test necessitated in each stage of product development, and it helps to diagnose potential interference problem and the interference volume scope discerned. help to test the validity of various meanss to save the situation.Otherwise, after complete machine is shaped, solve just unusual difficulty of problem that electromagnetic interference (EMI) causes again.Product is delivered and just might be obtained approval when electromagnetic compatibility authentication test mechanism carries out the electromagnetic compatibility index test after accomplishing manufacturing like this.
Electromagnetic Interference Test is one of test event of electromagnetic compatibility test, and in this test event, if can't find topmost electromagnetic interference source, what the big again energy of input was done on less important interference source well also almost is of no avail again.Thereby the orientation problem of electromagnetic interference source is expend energy on and the most scabrous problem in most Electromagnetic Interference Tests.
Test to electromagnetic interference (EMI) in the prior art is confined to utilize in the two dimensional surface spectrum analyzer to test basically, can not reflect the true electromagnetic compatibility situation in three dimensions of measurand, and price is very expensive again.And the spectrum analyzer of cheap low side does not reach measuring accuracy and requirement.And current Electromagnetic Interference Test is manual test basically, and frequent manual operation has reduced work efficiency on the one hand, makes test have uncertainty on the other hand.
In addition, because the intensity of electromagnetic interference (EMI) is very fast with the increase of distance decay, so the electromagnetic interference (EMI) that receives in different spaces is different, and prior art can't be tested the relation of learning electromagnetic interference (EMI) electromagnetic interference (EMI) and distance in three dimensions.
Summary of the invention
The object of the present invention is to provide and a kind ofly can save test duration and expense, improve the electromagnetic interference (EMI) automatic testing equipment and the method for test accuracy.
The objective of the invention is to realize like this:
Adopt a kind of electromagnetic interference (EMI) automatic testing equipment, comprise 3-dimensional freedom platform, computing machine, data acquisition and processing unit; 3-dimensional freedom platform comprises the electromagnetic interference (EMI) detection instrument, motor control unit and platform support bar; Data acquisition and processing unit comprise the PCI-7344 control card, PXI data collecting card and 6251 data collecting cards; Computing machine comprises the LabVIEW software unit, and spectral analysis unit and image show and storage unit; The electromagnetic interference (EMI) detection instrument is connected to the PXI data collecting card through the PXI bus; The spectral analysis unit of through the PXI bus data being sent into computing machine is then carried out analysis of electromagnetic interference; Analysis result is sent into the computer picture display unit; Computing machine connects PCI-7344 control card and 6251 data collecting cards through the PXI bus; Control the rotation of 3-dimensional freedom platform motor and the locus of electromagnetic interference (EMI) detection instrument, and the test result of electromagnetic interference (EMI) detection instrument is shown in the computing machine with the position is corresponding one by one.
The method of testing of Three Degree Of Freedom electromagnetic interference (EMI) automatic testing equipment is at first to set up the Three Degree Of Freedom support platform; Be divided into X, Y, three direction of motion of Z; The Electromagnetic Interference Test appearance is fixed in X axle support bar; Three motor control units are controlled the motion of X in the platform, Y, three directions of Z respectively, and PXI data collecting card, PCI-7344 control card and 6251 data collecting cards are integrated in data acquisition and processing unit, and the PXI data collecting card is linked to each other with the electromagnetic interference (EMI) detection instrument; The PCI-7344 control card links to each other with motor control unit, sets the spacing of X, Y, Z axle; After the test beginning; To receive examination equipment energising preheating; Initialization Three Degree Of Freedom proving installation; Change the position of Electromagnetic Interference Test appearance according to the order of X, Y, Z axle, the test data of Electromagnetic Interference Test appearance is sent to the PXI data collecting card through the PXI bus, and test result is sent into the spectral analysis unit of computing machine; Simultaneously, the positional information of three motors of 6251 data collecting card collections and information sent into computing machine; Utilize LabVIEW software that the spectrum information of PXI capture card is corresponding one by one with the position signalling of 6251 data collecting cards, the data after handling are sent to image show and the preservation unit, in the interface, show the electromagnetic interference (EMI) frequency spectrum and preserve data.
The said PCI-7344 control card concrete motion process of controlling that links to each other with motor control unit is following:
1. at first the X spindle motor is driven, every 2cm observes as an observation station;
2. after the X axle arrives set spacing, drive y-axis motor, every 2cm stops rear drive X spindle motor and carries out oppositely moving as an observation position, observes as an observation station with 2cm equally;
3. when the Y axle arrive to set spacing after, drive the Z spindle motor, every 2cm stops the rear drive y-axis motor and carries out oppositely moving as an observation position, equally with 2cm as an observation position, repeat the 2. operation in step;
4. after the Z axle arrived set spacing, EOT was preserved test data, and each shaft position makes zero.
The advantage of the inventive method is:
Realized being mapped one by one to the test of measurand 3 D electromagnetic interference and with test value and position of interference source.Utilize LabVIEW software design image to show and the preservation unit; Computer control PCI-7344 control card, 6251 data collecting cards and PXI data collecting card; The function of data analysis and processing unit is realized by computing machine; Realized having saved test duration and expense, improved test accuracy receiving the three-dimensional Electromagnetic Interference Test of examination equipment.
Description of drawings
Fig. 1 is a 3-dimensional freedom platform control method synoptic diagram;
Fig. 2 is a Three Degree Of Freedom electromagnetic interference (EMI) automatic testing equipment synoptic diagram;
Fig. 3 is Three Degree Of Freedom electromagnetic interference (EMI) auto test flow figure.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described:
In conjunction with Fig. 1, the 3-dimensional freedom platform motor control unit is made up of driver, scrambler, motor, PCI-7344 control card and 6251 data collecting cards.This platform motion is divided into following steps:
101, at first the X spindle motor is driven, every 2cm tests as an observation station stop motion;
102, scrambler X is sent to 6251 data collecting cards with the positional information of X axle in real time;
103, after the X axle arrives set spacing, drive y-axis motor, every 2cm stops rear drive X spindle motor and carries out oppositely moving as a stepping position, stops electromagnetism with 2cm as an observation station equally and tests;
104, scrambler Y is sent to 6251 data collecting cards with the positional information of Y axle in real time;
105, when the Y axle arrive to set spacing after, drive the Z spindle motor, every 2cm stops the rear drive y-axis motor and carries out oppositely moving as a stepping position, the Y axle equally with 2cm as a stepping position, stop the back and repeat 101 operation;
106, scrambler Z is sent to 6251 data collecting cards with the positional information of Z axle in real time;
107, after the Z axle arrives set spacing, EOT is preserved test data, and each shaft position makes zero.
In conjunction with Fig. 2, in the Three Degree Of Freedom Electromagnetic Interference Test device synoptic diagram:
201,1 expression computing machine is used for carrying out Control Software design and data processing and demonstration;
202,2 are data acquisition and processing unit, comprise PCI-7344 control card, 6251 data collecting cards, PXI data collecting card, be used to gather the positional information of three axles and the electromagnetic interference signal of electromagnetic interference (EMI) detection instrument, and the motion of three axles is controlled;
203,3 is the X-direction support bar, and 4 is the Y direction support bar, and 5 are the Z-direction support bar, corresponding, and 6 are X spindle motor control module (comprising driver, motor and scrambler), and 8 is Y axle control module, and 7 is Z axle control module;
204,9 is the electromagnetic interference (EMI) detection instrument, is used to test the electromagnetic interference signal that measurand is sent;
205,10 is the 3-dimensional freedom platform base, and this platform is an insulator, and measurand is put on it and the fixed position;
206, a is an X shaft position information Control line; B is a Y shaft position information Control line, and c is a Z shaft position information Control line, is responsible for being connected of three direction motor control units and data acquisition and processing unit; D and e are the PXI bus, are responsible for the signal of electromagnetic interference (EMI) detection instrument is transferred to computing machine.
In conjunction with Fig. 3, Three Degree Of Freedom Electromagnetic Interference Test device to test step is following:
301, to measurand energising preheating, personnel and other equipment are away from measurand;
302, initialization data collection and processing unit make zero three shaft positions;
303, at first the X spindle motor is driven, every 2cm tests as an observation station stop motion;
304, the X shaft encoder is sent to 6251 data collecting cards with the positional information of X axle in real time, and it is spacing to judge whether to reach the X axle, if change 306 over to, if not, change 305 over to;
305, computing machine is gathered electromagnetic interference signal through the PXI data acquisition unit, and utilizes spectral analysis unit that test data is carried out spectrum analysis;
306,6251 data collecting cards are sent to motor position information in the computing machine through pci bus;
307, electromagnetic interference (EMI) detection instrument position and spectrum analysis result are sent to image demonstration and storage unit, carry out correspondence one by one, preserve data simultaneously;
308, after the X axle arrives set spacing, drive y-axis motor, every 2cm is as a stepping position;
309, it is spacing that 6251 data collecting cards judge whether to reach the Y axle, if, change 306 and 308 over to, scrambler Y is sent to 6251 data collecting cards with the positional information of Y axle in real time, if not, change 310 over to;
310, when the Y axle arrive to set spacing after, drive the Z spindle motor, every 2cm stops the rear drive y-axis motor and carries out oppositely moving as a stepping position, the Y axle equally with 2cm as a stepping position, stop the back and repeat 101 operation;
311, after the Y axle arrives set spacing, drive the Z spindle motor, every 2cm is as a stepping position;
312, it is spacing that 6251 data collecting cards judge whether to reach the Z axle, if change 306 over to, and EOT, preserve test data, each shaft position makes zero;
313, finish test.
Claims (3)
1. a Three Degree Of Freedom electromagnetic interference (EMI) automatic testing equipment is characterized in that: comprise 3-dimensional freedom platform, computing machine, data acquisition and processing unit; 3-dimensional freedom platform comprises the electromagnetic interference (EMI) detection instrument, motor control unit and platform support bar; Data acquisition and processing unit comprise the PCI-7344 control card, PXI data collecting card and 6251 data collecting cards; Computing machine comprises the LabVIEW software unit, and spectral analysis unit and image show and storage unit; The electromagnetic interference (EMI) detection instrument is connected to the PXI data collecting card through the PXI bus; The spectral analysis unit of through the PXI bus data being sent into computing machine is then carried out analysis of electromagnetic interference; Analysis result is sent into the computer picture display unit; Computing machine connects PCI-7344 control card and 6251 data collecting cards through the PXI bus; Control the rotation of 3-dimensional freedom platform motor and the locus of electromagnetic interference (EMI) detection instrument, and the test result of electromagnetic interference (EMI) detection instrument is shown in the computing machine with the position is corresponding one by one.
2. method of testing that adopts the described Three Degree Of Freedom electromagnetic interference (EMI) of claim 1 automatic testing equipment; It is characterized in that: at first set up the Three Degree Of Freedom support platform; Be divided into X, Y, three direction of motion of Z, the Electromagnetic Interference Test appearance is fixed in X axle support bar, three motor control units are controlled the motion of X in the platform, Y, three directions of Z respectively; PXI data collecting card, PCI-7344 control card and 6251 data collecting cards are integrated in data acquisition and processing unit; And the PXI data collecting card linked to each other with the electromagnetic interference (EMI) detection instrument, the PCI-7344 control card links to each other with motor control unit, sets the spacing of X, Y, Z axle; After the test beginning; To receive examination equipment energising preheating; Initialization Three Degree Of Freedom proving installation; Change the position of Electromagnetic Interference Test appearance according to the order of X, Y, Z axle, the test data of Electromagnetic Interference Test appearance is sent to the PXI data collecting card through the PXI bus, and test result is sent into the spectral analysis unit of computing machine; Simultaneously, the positional information of three motors of 6251 data collecting card collections and information sent into computing machine; Utilize LabVIEW software that the spectrum information of PXI capture card is corresponding one by one with the position signalling of 6251 data collecting cards, the data after handling are sent to image show and the preservation unit, in the interface, show the electromagnetic interference (EMI) frequency spectrum and preserve data.
3. Three Degree Of Freedom electromagnetic interference (EMI) automatic test approach according to claim 2 is characterized in that: the said PCI-7344 control card concrete motion process of controlling that links to each other with motor control unit is following:
1. at first the X spindle motor is driven, every 2cm observes as an observation station;
2. after the X axle arrives set spacing, drive y-axis motor, every 2cm stops rear drive X spindle motor and carries out oppositely moving as an observation position, observes as an observation station with 2cm equally;
3. when the Y axle arrive to set spacing after, drive the Z spindle motor, every 2cm stops the rear drive y-axis motor and carries out oppositely moving as an observation position, equally with 2cm as an observation position, repeat the 2. operation in step;
4. after the Z axle arrived set spacing, EOT was preserved test data, and each shaft position makes zero.
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Cited By (9)
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| CN103529328A (en) * | 2013-10-22 | 2014-01-22 | 重庆长安汽车股份有限公司 | Device and method for testing electromagnetic interference |
| CN104653692A (en) * | 2014-11-04 | 2015-05-27 | 哈尔滨工程大学 | Space three-degree-of-freedom initiative execution mechanism |
| CN104777381A (en) * | 2015-04-15 | 2015-07-15 | 深圳市巴伦检测技术有限公司 | Double-antenna electromagnetic interference testing method and system |
| CN106057044A (en) * | 2016-08-08 | 2016-10-26 | 国网上海市电力公司 | Demonstrating teaching aid of electromagnetic radiation detection |
| CN106646025A (en) * | 2016-11-04 | 2017-05-10 | 国网山东省电力公司济南市长清区供电公司 | High voltage distribution line electromagnetic interference determinator |
| CN107889049A (en) * | 2016-09-30 | 2018-04-06 | 中国移动通信有限公司研究院 | A kind of interference positioning method and positioner |
| CN109164310A (en) * | 2018-07-12 | 2019-01-08 | 万达百汇科技（深圳）有限公司 | Anti-interference test system, monitoring device, anti-interference test method and terminal device |
| CN110579230A (en) * | 2019-08-29 | 2019-12-17 | 昆山佑泽欣智控设备有限公司 | Magnetic interference testing device for automobile ETC position sensor |
| CN112649681A (en) * | 2020-08-18 | 2021-04-13 | 合肥恒烁半导体有限公司 | MCU chip electromagnetic compatibility test circuit |
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| CN103529328A (en) * | 2013-10-22 | 2014-01-22 | 重庆长安汽车股份有限公司 | Device and method for testing electromagnetic interference |
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| CN104777381B (en) * | 2015-04-15 | 2018-03-27 | 深圳市巴伦检测技术有限公司 | A kind of Electromagnetic Interference Test method and system of double antenna |
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| CN106057044A (en) * | 2016-08-08 | 2016-10-26 | 国网上海市电力公司 | Demonstrating teaching aid of electromagnetic radiation detection |
| CN107889049A (en) * | 2016-09-30 | 2018-04-06 | 中国移动通信有限公司研究院 | A kind of interference positioning method and positioner |
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| CN106646025A (en) * | 2016-11-04 | 2017-05-10 | 国网山东省电力公司济南市长清区供电公司 | High voltage distribution line electromagnetic interference determinator |
| CN106646025B (en) * | 2016-11-04 | 2019-02-19 | 国网山东省电力公司济南市长清区供电公司 | A kind of high pressure matches power transmission sequence electromagnetic interference determination instrument |
| CN109164310A (en) * | 2018-07-12 | 2019-01-08 | 万达百汇科技（深圳）有限公司 | Anti-interference test system, monitoring device, anti-interference test method and terminal device |
| CN110579230A (en) * | 2019-08-29 | 2019-12-17 | 昆山佑泽欣智控设备有限公司 | Magnetic interference testing device for automobile ETC position sensor |
| CN112649681A (en) * | 2020-08-18 | 2021-04-13 | 合肥恒烁半导体有限公司 | MCU chip electromagnetic compatibility test circuit |
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Application publication date: 20120808 |