CN107015068B - A kind of EMC quasi-peak value test method and device - Google Patents
A kind of EMC quasi-peak value test method and device Download PDFInfo
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- CN107015068B CN107015068B CN201710338037.9A CN201710338037A CN107015068B CN 107015068 B CN107015068 B CN 107015068B CN 201710338037 A CN201710338037 A CN 201710338037A CN 107015068 B CN107015068 B CN 107015068B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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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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Abstract
The embodiment of the invention discloses a kind of EMC quasi-peak value test method and device, this method comprises: scanning obtains antenna corresponding initial spike of each Frequency point in the full rate section of radiation signal when preset height and turntable are in predetermined angle；Target frequency point is confirmed in each Frequency point according to the initial spike；The initial spike for keeping the target frequency point, confirms the corresponding object height of the initial spike and target angle；Precise frequency point and the corresponding quasi-peak value of precise frequency point are obtained in conjunction with the object height and the target angle.By using above-mentioned technical proposal, the error caused when quasi-peak value is read in the fixation position of antenna can be effectively solved, effectively improves the accuracy of quasi-peak value test.
Description
Technical field
The present embodiments relate to detection technique fields, more particularly to a kind of EMC quasi-peak value test method and device.
Background technique
With the continuous improvement of the working frequency and message transmission rate of electronic product, EMC (Electro Magnetic
Compatibility, electromagnetic compatibility) problem is more and more prominent.EMC standard becomes the mandatory mark of most electronic product both at home and abroad
Standard, and almost all of electronic product requires to obtain EMC certification in front of sales.
Method currently with semi-anechoic chamber test EMC be in a manner of peak detection based on, and determination frequency point is
No qualification is carried out by way of quasi-peak value detection.The program of quasi-peak value test at present is as follows: antenna is located at 1 meter of height
When, turntable is rotated by 360 °, and then for antenna elevation to 2 meters, turntable returns three-sixth turn again, and so on, when antenna is raised to 3 respectively
When rice is with 4 meters, the peak value of each Frequency point of follow-on test, and peak-peak is obtained as quasi-peak value.
However, due to the difference of different test sample own forms, volume, electronic circuit or structure, radiation-emitting situation
Also different.Fig. 1 is the electromagnetic radiation space schematic diagram that the prior art provides.As shown in Figure 1, electromagnetic wave space transmitting is just as 3D
Gain space is equally the distribution of non-regular shape.It, may if merely quasi-peak value of the reading antenna in fixed height
Maximum quasi-peak value is neglected.For example, going out if being located at non-integer height (such as antenna is located at 2.2 meters of height) in antenna
When existing maximum quasi-peak value, then test result will be caused inaccurate using the test mode of the prior art.And if for each
Different height is all once tested, and can workload be increased, time-consuming and laborious.Therefore, survey of the prior art to quasi-peak value
It is poor to try reliability.
Summary of the invention
The embodiment of the invention provides a kind of EMC quasi-peak value test method and devices, to solve prior art EMC quasi-peak value
The problem of testing reliability difference.
In a first aspect, the embodiment of the invention provides a kind of EMC quasi-peak value test methods, comprising:
Scanning obtains antenna each frequency in the full rate section of radiation signal when preset height and turntable are in predetermined angle
The corresponding initial spike of point；
Target frequency point is confirmed in each Frequency point according to the initial spike；
The initial spike of the target frequency point is kept, scanning confirms the corresponding object height of the initial spike and target
Angle；
Precise frequency point is obtained in conjunction with the object height and the target angle and precise frequency point is corresponding
Quasi-peak value.
Second aspect, the embodiment of the invention also provides a kind of EMC quasi-peak value test devices, comprising:
Initial spike scan module radiates letter when preset height and turntable are in predetermined angle for scanning acquisition antenna
Number full rate section in the corresponding initial spike of each Frequency point；
Target frequency point confirmation module, for confirming target frequency in each Frequency point according to the initial spike
Point；
Object height and angle confirmation module scan described in confirmation for keeping the initial spike of the target frequency point
The corresponding object height of initial spike and target angle；
Quasi-peak value obtains module, for obtaining precise frequency point and institute in conjunction with the object height and the target angle
State the corresponding quasi-peak value of precise frequency point.
The present invention is by providing a kind of EMC quasi-peak value testing scheme, being obtained by scanning antenna in preset height and turning
Platform is in predetermined angle in the full rate section of radiation signal after the corresponding initial spike of each Frequency point, according to initial spike in each frequency
Target frequency point is confirmed in rate point, provides foundation for the test of quasi-peak value.After determining target frequency point, target frequency point is kept
Corresponding initial spike, when there is the initial spike by scanning confirmation, where the object height and turntable where antenna
Target angle, and object height and target angle are combined can get precise frequency point, it is obtained for precise frequency point
The corresponding quasi-peak value of point.It solves and is carried out caused by EMC test in the case where antenna is only positioned at integer height and position in the prior art
Error promote the reliability of quasi-peak value test so that the test result of EMC quasi-peak value is more acurrate.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also implement according to the present invention
The content of example and these attached drawings obtain other attached drawings.
Fig. 1 is the electromagnetic radiation space schematic diagram that the prior art provides；
Fig. 2 is a kind of flow chart for EMC quasi-peak value test method that the embodiment of the present invention one provides；
Fig. 3 is a kind of flow chart of EMC quasi-peak value test method provided by Embodiment 2 of the present invention；
Fig. 4 is a kind of structural block diagram for EMC quasi-peak value test device that the embodiment of the present invention three provides.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
It should be mentioned that some exemplary embodiments are described as before exemplary embodiment is discussed in greater detail
The processing or method described as flow chart.Although each step is described as the processing of sequence by flow chart, many of these
Step can be implemented concurrently, concomitantly or simultaneously.In addition, the sequence of each step can be rearranged.When its operation
The processing can be terminated when completion, it is also possible to have the additional step being not included in attached drawing.The processing can be with
Corresponding to method, function, regulation, subroutine, subprogram etc..
Embodiment one
Fig. 2 is a kind of flow chart for EMC quasi-peak value test method that the embodiment of the present invention one provides.This method can be by
EMC quasi-peak value test device executes, which can be realized by the mode of software and/or hardware.As shown in Fig. 2, the party
Method specifically comprises the following steps:
Step 110, scanning obtain the full rate section of antenna radiation signal when preset height and turntable are in predetermined angle
In the corresponding initial spike of each Frequency point.
Wherein, EMC (electromagnetic compatibility) be to electronic product in terms of electromagnetic field EMI (Electromagnetic
Interference, electromagnetic interference) and EMS (Electro Magnetic Susceptibility, electromagnetism interference) ability
Comprehensive Assessment is one of most important index of Quality of electronic products.Master of the embodiment of the present invention to be tested is electronic product to week
The electromagnetic interference capability in collarette border.
The test of electromagnetic compatibility is made of test site and test equipment.Illustratively, test site can be standard EMC
Screened room (semi-anechoic chamber) (3 meters of fields or 10 meters of fields), or open area test site (3 meters of fields or 10 meters of fields).Illustratively, it tests
Equipment can include: turntable, antenna, receiver, standard testing table, controller, computer and auxiliary software etc..
When carrying out EMC test, equipment under test is placed in testboard center, the test benchmark point and equipment under test of antenna
The horizontal distance of imaginary radiation center (generally geometric center) be set as 3 meters, for receiving the radiation of equipment under test sending
Signal is simultaneously transmitted in receiver by cable.Before testing, Test Engineer needs to power on, and adjusts test equipment
Working condition and the shield door for closing semi-anechoic chamber.
After the completion of the preparation of early period, it can start to be tested.Start test software getting Test Engineer
Instruction after, test software will start peak value scan pattern.Antenna can be arranged in preset height by controller is 1 meter, 2
The position of rice, 3 meters and 4 meters.Specifically, when antenna is located at 1 meter of height, 360 degree forward or reverse of turntable；When antenna is located at 2
When meter Gao Du, turntable inverts on the basis of above-mentioned rotation angle or positive three-sixth turn.It should be noted that in order to guarantee turntable
Normal rotation, after turntable positive three-sixth turn for the first time, when secondary rotation, needs anti-three-sixth turn.And so on, work as antenna
When being located at above-mentioned 4 preset heights, turntable needs to rotate by different directions 4 times.After the completion of the above process, it can get
Each Frequency point is when above-mentioned 4 different antennae height and turntable are in above-mentioned 4 different angles in radiation signal full frequency band
Peak value simultaneously forms waveform diagram.Then the maximum peak of each Frequency point can be got from the corresponding different peak values of each Frequency point
Value is used as initial spike.Preferably, the range of full frequency band is 30M~1G hertz.
Step 120 confirms target frequency point according to initial spike in each Frequency point.
Wherein, target frequency point be peak value be more than or close to preset threshold value dispute point.Due to target frequency point
Amount of radiation may or already exceed preset standard, have the risk to cause damages to user, it is therefore desirable to target frequency point
Peak value verified.
Illustratively, the acquisition of target frequency point can be obtained by the way that initial spike is made comparisons with preset threshold peak
Initial spike is greater than the Frequency point of threshold peak as target frequency point.Wherein, preset threshold peak is the peak that regulation limits
Value is peak value set by intra-company.For example, at 300M hertz, if peak value set by regulation (amount of radiation) be less than
46dB, and when the peak value of current a certain Frequency point is 47dB, then the current Frequency point is target frequency point.Or present frequency point
When peak value is 45dB, Frequency point a possibility that there is also amount of radiation over range at this time, therefore can also be 45dB by present peak value
Frequency point as target frequency point.Above-mentioned target frequency point setting is advantageous in that: on the basis of preset threshold peak,
Frequency point satisfactory in each Frequency point of radiation signal can be excluded, and by the target of amount of radiation exceeded (or may exceeded)
Frequency point screens, and provides data basis for the test of next step quasi-peak value.In the test of next step quasi-peak value, due to being not required to
All Frequency points are tested, the test of quasi-peak value can be made more targeted, while achieving the effect that reduce calculation amount.
Step 130, the initial spike for keeping target frequency point, the corresponding object height of scanning confirmation initial spike and target
Angle.
For same frequency point, since the received amount of radiation of receiver institute is in real-time change, the height of antenna and turntable
Influence of the angle to amount of radiation is all larger, therefore, in order to obtain an accurate Frequency point, needs to obtain the first of target frequency point
All initial spikes are simultaneously always maintained at by beginning peak value.At this point, can pass through to obtain and survey in order to enable target frequency point can completely be shown
The instruction that engineer adjusts frequency range is tried, the frequency range of receiver is reduced, operation in this way can also increase frequency and show
Resolution ratio.For example, if target frequency point appears in 32M hertz, then by the way that frequency range is narrowed down to 30M~34M hertz
When, it can be targetedly that 32M hertz and surrounding point are tested again and be with the size for judging its quasi-peak value to frequency
It is no to comply with standard, while can also be improved the accuracy of test.
When due to the initial spike occur, the height and position of antenna is not necessarily high in the integer as described in step 110
Degree, meanwhile, the rotation angle of turntable is also not necessarily 0 degree or 360 degree.Therefore, it is necessary on the basis of keeping the initial spike,
There is object height corresponding to the Frequency point of the initial spike and target angle in acquisition.Wherein, when determining object height,
Can be fixed at an arbitrary position by turntable, and when determining target angle, then it needs the position of antenna being maintained at object height.Pass through
The determination of object height and target angle can solve in the prior art as the test of antenna integer height and caused by accidentally
Difference.
Step 140, combining target height and target angle obtain precise frequency point and the corresponding quasi- peak of precise frequency point
Value.
After determining object height and target angle, receiver can be labeled object height and target angle.So
After the instruction for triggering receiver " Peak function " by obtaining Test Engineer afterwards, it can get in object height and target angle
Precise frequency point under degree, and the corresponding quasi-peak value of precise frequency point can be shown by receiver.
It should be noted that need to test each target frequency point if target frequency point more than one, and
Determine the corresponding object height of each target frequency point and target angle, it, can be by undesirable target frequency after test
Rate point is handled, to promote the safety of product.
A kind of EMC quasi-peak value test method that the embodiment of the present invention one provides, is obtained by scanning antenna in preset height
And turntable is in predetermined angle in the full rate section of radiation signal after the corresponding initial spike of each Frequency point, according to initial spike
Target frequency point is confirmed in each Frequency point, provides foundation for the test of quasi-peak value.After determining target frequency point, target is kept
The corresponding initial spike of Frequency point, when there is the initial spike by scanning confirmation, object height and turntable where antenna
The target angle at place, and object height and target angle are combined can get precise frequency point, for precise frequency
Point obtains the corresponding quasi-peak value of point.It solves and only carries out EMC test in the case where antenna is located at integer height and position in the prior art
Caused error promotes the reliability of quasi-peak value test so that the test result of EMC quasi-peak value is more acurrate.
Embodiment two
Fig. 3 is a kind of flow chart of EMC quasi-peak value test method provided by Embodiment 2 of the present invention.The present embodiment is with above-mentioned
Based on embodiment one, to " initial spike of holding target frequency point, the corresponding object height of confirmation initial spike and target angle
The process of degree " is refined, and referring to Fig. 3, the embodiment of the present invention specifically comprises the following steps:
Step 210, scanning obtain the full rate section of antenna radiation signal when preset height and turntable are in predetermined angle
In the corresponding initial spike of each Frequency point.
Step 220 confirms target frequency point according to initial spike in each Frequency point.
Step 230, scanning obtain antenna from the first preset height to the second preset height, the initial spike of target frequency point
Corresponding object height.
Wherein, the first preset height is preferably 1 meter, and the second preset height is preferably 4 meters.When determining object height, such as
Content described in above-described embodiment needs target frequency point completely to be shown the frequency range diminution of receiver.Together
When need by the peak holding of each target frequency point in initial spike.Then turntable is fixed at an arbitrary position, and control antenna
4 meters (or dropping to 1 meter from 4 meters) are risen to from 1 meter.In the process, when there is current goal Frequency point initial spike in record
Elevation information, that is, object height of antenna.Above-mentioned setting is advantageous in that there may be radiate exceeded current mesh for testing
When marking Frequency point, since the scanning range of antenna is the standard from 1 meter to 4 meter, when this range in addition to including antenna height is integer
Peak value can also test antenna height be non-integer when quasi-peak value, solve only when antenna is located at integer height to quasi-peak value into
The status of row test, improves power of the test.After getting the object height of antenna, controllable antenna is maintained at above-mentioned target position
It sets to carry out the test of next step.
Step 240, in object height, scanning obtains turntable and rotates a circle, the corresponding mesh of initial spike of target frequency point
Mark angle.
Wherein, target angle is during the test, the turntable when initial spike that peak value is current goal Frequency point occur
Angle.It should be noted that during the test, needing to set object height for the position of antenna, while controlling turntable
It rotates a circle, target angle information can be got in rotary course.The setting of target angle can avoid only at 0 degree or 360 degree
The case where Shi Jinhang quasi-peak value is tested, improves the accuracy of test.
Step 250, combining target height and target angle obtain precise frequency point and the corresponding quasi- peak of precise frequency point
Value.
Step 260 verifies quasi-peak value, and shows quasi-peak value.
Before verifying to quasi-peak value, need Test Engineer that receiver is adjusted to spectrum analysis mode.Wherein, right
Mode described in above-mentioned steps 230 and step 240 can be used in the mode that quasi-peak value is verified, and details are not described herein again.It is logical
Verifying is crossed, can further determine that whether target frequency point is the exceeded point of quasi-peak value, to promote the reliability of EMC test.
The present embodiment two on the basis of the above embodiments, passes through the corresponding target of initial spike of determining target frequency point
Height and target angle, can be further determined that out according to object height and target angle amount of radiation may over range Frequency point and
Its quasi-peak value, promotes the accuracy of EMC quasi-peak value test, while can provide foundation for the judgement of next step quasi-peak value, with detection
Whether the amount of radiation of product is exceeded, and then promotes the reliability of test.
Embodiment three
Fig. 4 is a kind of structural block diagram for EMC quasi-peak value test device that the embodiment of the present invention three provides.The device can be by soft
Part and/or hardware realization, are typically integrated in test equipment.As shown in figure 4, the device includes: initial spike scan module
310, target frequency point confirmation module 320, object height and angle confirmation module 330 and quasi-peak value obtain module 340.
Wherein, initial spike scan module 310 obtains antenna in preset height and turntable in predetermined angle for scanning
When radiation signal full rate section in the corresponding initial spike of each Frequency point；Target frequency point confirmation module 320, for according to institute
It states initial spike and confirms target frequency point in each Frequency point；Object height and angle confirmation module 330, for keeping
The initial spike of target frequency point is stated, scanning confirms the corresponding object height of the initial spike and target angle；Quasi-peak value obtains
Modulus block 340, for obtaining precise frequency point and precise frequency point in conjunction with the object height and the target angle
Corresponding quasi-peak value.
A kind of EMC quasi-peak value test device that the embodiment of the present invention three provides, is obtained by scanning antenna in preset height
And turntable is in predetermined angle in the full rate section of radiation signal after the corresponding initial spike of each Frequency point, according to initial spike
Target frequency point is confirmed in each Frequency point, provides foundation for the test of quasi-peak value.After determining target frequency point, target is kept
The corresponding initial spike of Frequency point, when there is the initial spike by scanning confirmation, object height and turntable where antenna
The target angle at place, object height and target angle, which are combined, can get precise frequency point, and be directed to precise frequency
Point obtains the corresponding quasi-peak value of point.It solves and only carries out EMC test in the case where antenna is located at integer height and position in the prior art
Caused error promotes the reliability of quasi-peak value test so that the test result of EMC quasi-peak value is more acurrate.
On the basis of the above embodiments, the object height and angle confirmation module 330 are specifically used for:
Scanning obtains the antenna from the first preset height to the second preset height, the initial spike of the target frequency point
Corresponding object height；In the object height, scanning obtains turntable and rotates a circle, the initial spike pair of the target frequency point
The target angle answered.
On the basis of the above embodiments, the target frequency point confirmation module 320 is specifically used for: by the initial spike
It makes comparisons with preset threshold peak, obtains initial spike and be greater than the Frequency point of the threshold peak as target frequency point.
On the basis of the above embodiments, the initial spike scan module 310 is specifically used for: obtaining antenna in 1 meter, 2
Rice, 3 meters and when 4 meters of positions and the turntable forward or reverse one week when, described in the full rate section of the radiation signal respectively
The corresponding initial spike of Frequency point.
On the basis of the above embodiments, the device further include: authentication module, in conjunction with the object height and institute
After stating target angle acquisition precise frequency point and the corresponding quasi-peak value of precise frequency point, the quasi-peak value is tested
Card, and show the quasi-peak value.
EMC provided by any embodiment of the invention can be performed in the EMC quasi-peak value test device provided in above-described embodiment
Quasi-peak value test method has and executes the corresponding functional module of this method and beneficial effect.It is not detailed in the above-described embodiments to retouch
The technical detail stated, reference can be made to EMC quasi-peak value test method provided by any embodiment of the invention.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (6)
1. a kind of EMC quasi-peak value test method characterized by comprising
Scanning obtains antenna each Frequency point pair in the full rate section of radiation signal when preset height and turntable are in predetermined angle
The initial spike answered；
Target frequency point is confirmed in each Frequency point according to the initial spike；
The initial spike of the target frequency point is kept, scanning confirms the corresponding object height of the initial spike and target angle
Degree；
Precise frequency point and the corresponding quasi- peak of precise frequency point are obtained in conjunction with the object height and the target angle
Value；
Wherein, target frequency point is confirmed in each Frequency point according to the initial spike, comprising:
The initial spike is made comparisons with preset threshold peak, obtains the Frequency point that initial spike is greater than the threshold peak
As target frequency point；
The initial spike of the target frequency point is kept, scanning confirms the corresponding object height of the initial spike and target angle
Degree, comprising:
Scanning obtains the antenna from the first preset height to the second preset height, and the initial spike of the target frequency point is corresponding
Object height；
In the object height, scanning obtains turntable and rotates a circle, the corresponding target angle of initial spike of the target frequency point
Degree.
2. existing the method according to claim 1, wherein the scanning obtains antenna in preset height and turntable
The corresponding initial spike of each Frequency point in the full rate section of radiation signal when predetermined angle, comprising:
Antenna is obtained in 1 meter, 2 meters, 3 meters and 4 meters of positions and at the turntable one week forward or reverse, the radiation signal
Full rate section described in the corresponding initial spike of each Frequency point.
3. the method according to claim 1, wherein object height described in the combination and the target angle obtain
After taking precise frequency point and the corresponding quasi-peak value of precise frequency point, further includes:
The quasi-peak value is verified, and shows the quasi-peak value.
4. a kind of EMC quasi-peak value test device characterized by comprising
Initial spike scan module obtains antenna radiation signal when preset height and turntable are in predetermined angle for scanning
The corresponding initial spike of each Frequency point in full rate section；
Target frequency point confirmation module, for confirming target frequency point in each Frequency point according to the initial spike；
Object height and angle confirmation module, for keeping the initial spike of the target frequency point, scanning confirmation is described initial
The corresponding object height of peak value and target angle；
Quasi-peak value obtains module, for obtaining precise frequency point and the essence in conjunction with the object height and the target angle
The corresponding quasi-peak value of true Frequency point；
Wherein, the target frequency point confirmation module is specifically used for:
The initial spike is made comparisons with preset threshold peak, obtains the Frequency point that initial spike is greater than the threshold peak
As target frequency point；
The object height and angle confirmation module are specifically used for:
Scanning obtains the antenna from the first preset height to the second preset height, and the initial spike of the target frequency point is corresponding
Object height；
In the object height, scanning obtains turntable and rotates a circle, the corresponding target angle of initial spike of the target frequency point
Degree.
5. device according to claim 4, which is characterized in that the initial spike scan module is specifically used for:
Antenna is obtained in 1 meter, 2 meters, 3 meters and 4 meters of positions and at the turntable one week forward or reverse, the radiation signal
Full rate section described in the corresponding initial spike of each Frequency point.
6. device according to claim 4, which is characterized in that further include:
Authentication module, for obtaining precise frequency point and the accurate frequency in conjunction with the object height and the target angle
After the corresponding quasi-peak value of rate point, the quasi-peak value is verified, and shows the quasi-peak value.
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| CN109375023A (en) * | 2018-12-03 | 2019-02-22 | 晶晨半导体(上海)股份有限公司 | EMI test method and system |
| CN110887996A (en) * | 2019-11-22 | 2020-03-17 | 苏州浪潮智能科技有限公司 | Radiation testing method and system |
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