CN109932570A - Shield shield effectiveness test is popped one's head in miniature electric field - Google Patents
Shield shield effectiveness test is popped one's head in miniature electric field Download PDFInfo
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- CN109932570A CN109932570A CN201910061388.9A CN201910061388A CN109932570A CN 109932570 A CN109932570 A CN 109932570A CN 201910061388 A CN201910061388 A CN 201910061388A CN 109932570 A CN109932570 A CN 109932570A
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Abstract
The invention discloses a kind of shield shield effectiveness tests to be popped one's head in miniature electric field, including printed monopole sub-antenna, integral/detecting circuit, data acquisition/storage circuit, power circuit, battery, key and metal shielding, in addition to printed monopole sub-antenna and key, rest part is placed in metal shielding, integrating circuit/detecting circuit, data acquisition/storage circuit and power circuit connect arranged stacked by arranging needle, and battery is placed between laminate circuits；One outer surface of printed monopole sub-antenna and metal shielding is affixed, and key is installed on metal shielding outer surface, and is electrically connected with data acquisition/storage circuit.Shield shield effectiveness test of the present invention is popped one's head in not only small in size, functional with miniature electric field, and also collection data acquire/be stored in one, without connecting other external equipments when use.
Description
Technical field
The invention belongs to field strength measurement devices, and in particular to a kind of shield shield effectiveness test is popped one's head in miniature electric field.
Background technique
With the development of science and technology, electronic equipment starts to develop toward the direction of smallerization, this is to small shield electric field
The equipment of shield effectiveness test proposes more strict requirements.Currently, small used in existing shield shield effectiveness test
Type electric field probe size is too big, because very long in low-frequency range wavelength, in order to be coupled to low frequency electric field, the antenna part of probe
Size must also increase (0.1 times of generally slightly smaller than surveyed highest frequency wavelength), be not able to satisfy certain size small shields
The requirement of test.
On the other hand, existing miniature electric field probe needs external other equipment in test mostly, it means that necessary
The aperture on shield to be measured, this destroys the performances of shield, affect the accuracy of test result.
Summary of the invention
It is an object of the invention to be not less than 90*72*72mm small shield in the electric field shielding efficiency of low-frequency range for size
Test provides field intensity probe device.The electric field not less than 90*72*72mm small shield in low-frequency range can reliably be measured size
Shield effectiveness.
In order to realize that technical purpose of the invention, the present invention use following technological means:
A kind of shield shield effectiveness test is popped one's head in miniature electric field, comprising:
One metal shielding, the inside of the metal shielding have a rectangular enclosure, in the rectangular enclosure from the bottom up according to
Sublevel laying up is equipped with integral/detecting circuit, power circuit and data acquisition/storage circuit；
The shell side outer wall of the metal shielding is equipped with printed monopole sub-antenna, and the printed monopole sub-antenna passes through the
One row's needle is electrically connected with the integral/detecting circuit for being placed on bottommost in metal shielding；
Power circuit is powered to data acquisition/storage circuit and integral/detecting circuit respectively by second row needle；
Data acquisition/storage circuit arranges needle by third and reads numerical value and storage after detection from integral/detecting circuit；
Key is installed on the metal shielding outer surface, and is electrically connected with data acquisition/storage circuit, for standby mould
Three kinds of formula, data acquisition/memory module, data output mode operating modes switch over；
The principle that can be equivalent to capacitor using printed monopole sub-antenna is made it detect space electric field, and exports space electric field
Differential value, integrating circuit receive the differential value by first row needle, since the gain of integrating circuit declines in ten octave of 20dB/
Trend, in conjunction with the frequency response characteristic of printed monopole sub-antenna, probe distal end can obtain flat response；
Detecting circuit carries out detection to the electric field signal after integral and handles to obtain corresponding direct current signal；
Data acquisition/storage circuit arranges needle by third and acquires this direct current signal, and is reduced to the field of space electric field in inside
Intensity values are stored；
After the completion of data acquisition, data acquisition/storage circuit passes through the field intensity value that itself preset serial interface will be stored
Host computer is sent to be read out.
The metal shielding is the hexahedron of 24*24*20mm, and there are three circular through holes on one side surface of shell；
The printed monopole sub-antenna is the rectangular sheet structure that size is 30*24*1mm, and the surface of antenna side is equipped with
Three circles have the pad of through-hole, and the side surface there are three circular through hole is set on printed monopole sub-antenna and metal shielding
It is close to.
Integral/the detecting circuit and data acquisition/storage circuit are the laminated structure that size is 20*20*1mm；
Power circuit is the laminated structure that size is 20*14*1mm.
4, shield shield effectiveness test according to claim 1 is popped one's head in miniature electric field, it is characterised in that: described
Battery is set between data acquisition/storage circuit, power circuit and integral/detecting circuit in metal shielding.
5, shield shield effectiveness test according to claim 1 is popped one's head in miniature electric field, it is characterised in that: data
Acquisition/storage circuit sampling resolution is 12, and sample rate is adjustable in 0 ~ 1 MHz range.
6, shield shield effectiveness test according to claim 1 is popped one's head in miniature electric field, it is characterised in that: detection
The detection power bracket of circuit is -90dBm ~ 0dBm, and the compression point of integrating circuit is -75dBm.
Compared with prior art, the present invention its remarkable advantage is:
(1) size is small, can be placed in the small shielding of 90*72*72mm and carry out shield effectiveness test；
(2) functional, the dynamic range of 60dB can be realized in 10kHz ~ 10MHz frequency range；
(3) integrate data acquisition, storage, external other equipment are not necessarily to when use, without destroying the complete of tested shield
Property.
Detailed description of the invention
Fig. 1 is the schematic front view of miniature electric field of the present invention probe.
Wherein, 1, printed monopole sub-antenna；
Fig. 2 is the right side view of miniature electric field of the present invention probe.
Wherein, 2, key；3, metal shielding；4, data acquisition/storage circuit；5, power circuit；6, second row needle；8,
First row needle；9, integral/detecting circuit；10, third arranges needle；
Fig. 3 is the A-A cross-sectional view of Fig. 1 of the present invention.
Fig. 4 is the B-B cross-sectional view of Fig. 3 of the present invention.
Wherein, 7, power supply；
Fig. 5 is frequency response of the printed monopole sub-antenna of the present invention in the case where field strength is 1V/m electric field.
Fig. 6 is gain of the integrating circuit of the present invention in 10kHz ~ 10MHz.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
As shown in Fig. 1 ~ Fig. 4, a kind of shield shield effectiveness test of the present invention is popped one's head in miniature electric field, comprising:
One metal shielding 3, the inside of the metal shielding 3 have a rectangular enclosure, in the rectangular enclosure from the bottom up
It stacks gradually and is disposed with integral/detecting circuit 9, power circuit 5 and data acquisition/storage circuit 4；
The shell side outer wall of the metal shielding 3 is equipped with printed monopole sub-antenna 1, and the printed monopole sub-antenna 1 is logical
It crosses first row needle 8 and is electrically connected with the integral/detecting circuit 9 for being placed on bottommost in metal shielding 3；
Power circuit 5 is powered to data acquisition/storage circuit 4 and integral/detecting circuit 9 respectively by second row needle 6；
Data acquisition/storage circuit 4 arranges needle 10 by third and reads numerical value and storage after detection from integral/detecting circuit 9；
Key 2 is arranged on metal shielding, is used for standby mode, data acquisition/memory module, data output mode three
Kind operating mode switches over；
The principle of the present invention is as follows: can be equivalent to the principle of capacitor using printed monopole sub-antenna 1, it is made to detect space electricity
, and the differential value of space electric field is exported, the frequency response of printed monopole sub-antenna under the electric field rises in ten octave of 20dB/
Trend；Integrating circuit receives the differential value by row's needle 8, since the gain of integrating circuit is in ten octave downward trend of 20dB/,
In conjunction with the frequency response characteristic of printed monopole sub-antenna, probe distal end can obtain flat response.After detecting circuit is to integral
Electric field signal carry out detection handle to obtain corresponding direct current signal；Data acquisition/storage circuit acquires this by row's needle 10
One direct current signal, and stored in the field intensity value that inside is reduced to space electric field.After the completion of data acquisition, data acquisition/
The field intensity value stored is sent to host computer by itself preset serial interface and is read out by storage circuit.
One as a kind of shield shield effectiveness test miniature electric field probe technologies scheme of the present invention is further excellent
Choosing, the metal shielding are the hexahedron of 24*24*20mm, and there are three circular through holes on one side surface of shell；
The printed monopole sub-antenna is the rectangular sheet structure that size is 30*24*1mm, and the surface of antenna side is equipped with
Three circles have the pad of through-hole, and the side surface there are three circular through hole is set on printed monopole sub-antenna and metal shielding
It is close to.
One as a kind of shield shield effectiveness test miniature electric field probe technologies scheme of the present invention is further excellent
Choosing, the integral/detecting circuit and data acquisition/storage circuit are the laminated structure that size is 20*20*1mm；
Power circuit is the laminated structure that size is 20*14*1mm.
One as a kind of shield shield effectiveness test miniature electric field probe technologies scheme of the present invention is further excellent
Choosing, the metal shielding is interior to be arranged battery between data acquisition/storage circuit, power circuit and integral/detecting circuit.
Data acquisition/storage circuit sampling resolution is 12, and sample rate is adjustable, reaches as high as 1MHz.
The dynamic range of miniature electric field probe depends primarily on the sensitivity of detecting circuit and integrating circuit increases at 10kHz
The compression point of benefit.
Wavelength very little by printed monopole sub-antenna size compared with institute's measured frequency, equivalent circuit are a capacitor, frequency
Rate response is that ten octave of 20dB/ as shown in Figure 5 is incremented by.But at this point, there are two problems:
1, antenna induction field strength is too small, and subsequent conditioning circuit is difficult to detect and handle so small signal, and the sensitivity of probe is difficult to protect
Card；
2, it is incremented by due to the frequency response of antenna for ten octave of 20dB/, and pops one's head in and require frequency response to be flat before detection.Needle
Following solution is proposed to two above problem:
Apply the integrating circuit based on operational amplifier of a high-gain between detecting circuit and printed monopole sub-antenna.
From fig. 6, it can be seen that integrator gain is very high, 63dB is reached in 10kHz, and frequency response is in ten frequency multiplication of 20dB/
Journey downward trend, just with printed monopole on the contrary, the two superposition can be obtained splendid flatness.The dynamic range master of probe
To depend on the compression point of sensitivity and the integrator gain in 10kHz of detecting circuit: the detection power model of detecting circuit
Enclose for -90dBm ~ 0dBm, the compression point of integrating circuit is -75dBm, in conjunction with Fig. 5 and Fig. 6 frequency response curve it is found that this hair
The field strength range of bright probe detection can cover 0.15V/m ~ 150V/m, realize the dynamic range of 60dB.
A kind of application method that the test of shield shield effectiveness is popped one's head in miniature electric field of the present invention:
It presses the button, makes miniature electric field probe in data acquisition/memory module, miniature electric field probe first automatic will be removed at this time
The data stored before.Miniature electric field probe is correctly put, miniature electric field probe starts to examine space electric field field intensity value
It surveys and stores, pressed the button after to be tested, so that miniature electric field probe is worked in standby mode, open the one of metal shielding
Data acquisition/storage circuit connect with host computer, presses the button again at this time, data acquisition/storage circuit will deposit by side aluminium sheet
The data of storage are sent to host computer by itself preset serial interface and read.
Claims (6)
1. a kind of shield shield effectiveness test is popped one's head in miniature electric field characterized by comprising
One metal shielding, the inside of the metal shielding have a rectangular enclosure, in the rectangular enclosure from the bottom up according to
Sublevel laying up is equipped with integral/detecting circuit, power circuit and data acquisition/storage circuit；
The shell side outer wall of the metal shielding is equipped with printed monopole sub-antenna, and the printed monopole sub-antenna passes through the
One row's needle is electrically connected with the integral/detecting circuit for being placed on bottommost in metal shielding；
Power circuit is powered to data acquisition/storage circuit and integral/detecting circuit respectively by second row needle；
Data acquisition/storage circuit arranges needle by third and reads numerical value and storage after detection from integral/detecting circuit；
Key is installed on the metal shielding outer surface, and is electrically connected with data acquisition/storage circuit, for standby mould
Three kinds of formula, data acquisition/memory module, data output mode operating modes switch over；
The principle that can be equivalent to capacitor using printed monopole sub-antenna is made it detect space electric field, and exports space electric field
Differential value, integrating circuit receive the differential value by first row needle, since the gain of integrating circuit declines in ten octave of 20dB/
Trend, in conjunction with the frequency response characteristic of printed monopole sub-antenna, probe distal end can obtain flat response；
Detecting circuit carries out detection to the electric field signal after integral and handles to obtain corresponding direct current signal；
Data acquisition/storage circuit arranges needle by third and acquires this direct current signal, and is reduced to the field of space electric field in inside
Intensity values are stored；
After the completion of data acquisition, data acquisition/storage circuit passes through the field intensity value that itself preset serial interface will be stored
Host computer is sent to be read out.
2. shield shield effectiveness test according to claim 1 is popped one's head in miniature electric field, which is characterized in that the metal
Shielding case is the hexahedron of 24*24*20mm, and there are three circular through holes on one side surface of shell；
The printed monopole sub-antenna is the rectangular sheet structure that size is 30*24*1mm, and the surface of antenna side is equipped with
Three circles have the pad of through-hole, and the side surface there are three circular through hole is set on printed monopole sub-antenna and metal shielding
It is close to.
3. shield shield effectiveness test according to claim 1 is popped one's head in miniature electric field, which is characterized in that the product
Point/detecting circuit and data acquisition/storage circuit be laminated structure that size is 20*20*1mm；
Power circuit is the laminated structure that size is 20*14*1mm.
4. shield shield effectiveness test according to claim 1 is popped one's head in miniature electric field, it is characterised in that: the metal
Battery is set between data acquisition/storage circuit, power circuit and integral/detecting circuit in shielding case.
5. shield shield effectiveness test according to claim 1 is popped one's head in miniature electric field, it is characterised in that: data are adopted
Collection/storage circuit sampling resolution is 12, and sample rate is adjustable in 0 ~ 1 MHz range.
6. shield shield effectiveness test according to claim 1 is popped one's head in miniature electric field, it is characterised in that: detecting circuit
Detection power bracket be -90dBm ~ 0dBm, the compression point of integrating circuit is -75dBm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910061388.9A CN109932570B (en) | 2019-01-23 | 2019-01-23 | Small electric field probe for testing shielding effectiveness of shielding body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910061388.9A CN109932570B (en) | 2019-01-23 | 2019-01-23 | Small electric field probe for testing shielding effectiveness of shielding body |
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| Publication Number | Publication Date |
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| CN109932570A true CN109932570A (en) | 2019-06-25 |
| CN109932570B CN109932570B (en) | 2021-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910061388.9A Active CN109932570B (en) | 2019-01-23 | 2019-01-23 | Small electric field probe for testing shielding effectiveness of shielding body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025027A (en) * | 2019-12-20 | 2020-04-17 | 东南大学 | Small electric field probe for testing broad-band shielding effectiveness of shield and working and using method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6255830B1 (en) * | 1998-05-04 | 2001-07-03 | Nortel Networks Limited | Method of testing shielding effectiveness and electromagnetic field generator for use in testing shielding effectiveness |
| CN102841262A (en) * | 2011-06-21 | 2012-12-26 | 武汉市碧海云天环保科技有限责任公司 | Omni-directional intelligent comprehensive field intensity indicator |
| CN103823122A (en) * | 2014-02-21 | 2014-05-28 | 中国人民解放军理工大学 | Small pulsed electric field and magnetic field integrated measurement device |
| CN104375012A (en) * | 2014-11-21 | 2015-02-25 | 南京信息工程大学 | Lightning transient three-dimensional electric field testing sensor |
| CN105242121A (en) * | 2015-11-13 | 2016-01-13 | 南京信息职业技术学院 | Portable electromagnetic radiation survey meter |
| JP2018036552A (en) * | 2016-09-01 | 2018-03-08 | 日本電信電話株式会社 | Electromagnetic information restoration evaluation device, electromagnetic information restoration evaluation method, and electromagnetic information restoration evaluation processing program |
| CN108872717A (en) * | 2018-03-28 | 2018-11-23 | 中国人民解放军63653部队 | A kind of small-sized transient pulse electric field measurement system |
-
2019
- 2019-01-23 CN CN201910061388.9A patent/CN109932570B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6255830B1 (en) * | 1998-05-04 | 2001-07-03 | Nortel Networks Limited | Method of testing shielding effectiveness and electromagnetic field generator for use in testing shielding effectiveness |
| CN102841262A (en) * | 2011-06-21 | 2012-12-26 | 武汉市碧海云天环保科技有限责任公司 | Omni-directional intelligent comprehensive field intensity indicator |
| CN103823122A (en) * | 2014-02-21 | 2014-05-28 | 中国人民解放军理工大学 | Small pulsed electric field and magnetic field integrated measurement device |
| CN104375012A (en) * | 2014-11-21 | 2015-02-25 | 南京信息工程大学 | Lightning transient three-dimensional electric field testing sensor |
| CN105242121A (en) * | 2015-11-13 | 2016-01-13 | 南京信息职业技术学院 | Portable electromagnetic radiation survey meter |
| JP2018036552A (en) * | 2016-09-01 | 2018-03-08 | 日本電信電話株式会社 | Electromagnetic information restoration evaluation device, electromagnetic information restoration evaluation method, and electromagnetic information restoration evaluation processing program |
| CN108872717A (en) * | 2018-03-28 | 2018-11-23 | 中国人民解放军63653部队 | A kind of small-sized transient pulse electric field measurement system |
Non-Patent Citations (1)
| Title |
|---|
| 赵强 等: "全向电场探头及数据采集系统", 《宇航计测技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025027A (en) * | 2019-12-20 | 2020-04-17 | 东南大学 | Small electric field probe for testing broad-band shielding effectiveness of shield and working and using method thereof |
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