CN203981794U - Hand-held shield effectiveness detector - Google Patents
Hand-held shield effectiveness detector Download PDFInfo
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- CN203981794U CN203981794U CN201420323202.5U CN201420323202U CN203981794U CN 203981794 U CN203981794 U CN 203981794U CN 201420323202 U CN201420323202 U CN 201420323202U CN 203981794 U CN203981794 U CN 203981794U
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- 230000005684 electric field Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 21
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000004891 communication Methods 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model provides a kind of hand-held shield effectiveness detector, comprises and sends the transmitter of pulse signal, the receiver of return pulse signal and radio frequency antenna apparatus, and described radio frequency antenna apparatus is arranged on respectively on transmitter and receiver; Transmitter comprises transmitting microprocessor, the emission switch, display device, the emission of radio frequency signals chip that are connected with transmitting microprocessor; Described receiver comprises reception microprocessor, the radiofrequency signal receiving chip, display device, the receiving key that are connected with reception microprocessor; Emission of radio frequency signals chip and radiofrequency signal receiving chip adopt CC1101 chip.Hand-held shield effectiveness detector for the shield effectiveness of screened room and shield such as shielding shelter etc. require, the feature of information leakage and communication develops.Mainly solve shielding shelter and screened room and in use particularly use performance after, two year to decline gradually, can screen effect index meet " quantitatively " constantly " fixed point " test problems of actual needs.
Description
Technical field
The utility model relates to a kind of instrument that shield is carried out to shield effectiveness detection, especially relates to a kind of hand-held shield effectiveness detector.
Background technology
Since the nineties Gulf War in last century, various countries are generally all paid much attention to information security, IT-based warfare demand.China's the parties concerned is also being paid close attention to always, in decades the whole nation each confidential system, concerning security matters unit has been equipped with a large amount of screened rooms, each field army have been equipped with a large amount of electromagnetic shielding square cabins, these facilities, to ensureing the information security of China, are accomplished fluently information-based local war and have been brought into play vital role.
But As time goes on, all kinds of screened room shielding propertiess start to decline, existing detection system can not guarantee that its shielding properties is all the time in safe range, and user need to have shielding properties that a set of self-checking equipment and rules ensure screened room constantly always in safe range.The communication and command shielding shelter that each field army are used is because service condition is severe, shield effectiveness index decline problem is more serious, according to units concerned, to 1986-2008, produce 31 shelters of 14 kinds of vehicles totals per year in September, 2010 and shield effect test (result is attached), screen effect index is all defective, and performance index drop by half above (containing half) accounts for more than 80%.
Owing to there is no detection support equipment, detection support method, the detection safeguards system of unified standard, user to this cannot see, impalpable performance index cannot be confirmed, cannot ensure, even a lot of users not know the shielding properties of the shielding shelter that its uses should be how many? be how many now? how much shielding index just can not meet the requirement of operation communication and command if dropping to.These do not know more dangerous, more fearful than the hydraulic performance decline of actual product, are badly in need of wanting the portable screen effect checkout equipment of low price of a set of energy self check yet.In the past few years, solution is all being found by Duo Jia unit, but there is no so far result, and demand is very urgent.
Address this problem, equipment must meet following several condition simultaneously: simple to operate, layman can complete screen effect and detect; Measurement result is reliable, can meet actual measurement demand, reproducible; Realize measurement result not only " quantitatively " but also " fixed point ", to facilitate find problem, to deal with problems; Volume is little, lightweight, portable, strong adaptability; Price is low, easily popularization.
Existing screen effect testing product volume is large, price is more expensive, complicated operation is to aim at all kinds of shields screen effects to receive, and the special product quantitatively detecting can " quantitatively " but can not " fix a point " to address the above problem.
Utility model content
The utility model provides a kind of hand-held shield effectiveness detector, has solved the problem that the daily screen effect of screened room and shielding shelter detects performance maintenance, and its technical scheme is as described below:
A hand-held shield effectiveness detector, comprises and sends the transmitter of pulse signal, the receiver of return pulse signal and radio frequency antenna apparatus, described radio frequency antenna apparatus is arranged on respectively on transmitter and receiver;
Described transmitter comprises transmitting microprocessor, the emission switch, display device, the emission of radio frequency signals chip that are connected with transmitting microprocessor; Described receiver comprises reception microprocessor, the radiofrequency signal receiving chip, display device, the receiving key that are connected with reception microprocessor;
Described emission of radio frequency signals chip and radiofrequency signal receiving chip adopt CC1101 chip.
Described transmitting microprocessor and reception microprocessor adopt MCU chip.
Described emission of radio frequency signals chip also comprises AD9851 chip, and described AD9851 chip is all connected with reference frequency source with CC1101 chip.
Described radio frequency antenna apparatus is magnetic field antenna or electric field antenna, comprises LC resonant circuit.The pulse signal frequency that described transmitter sends is 14kHz, 434MHz, 915MHz and 150kHz.
Described radiofrequency signal receiving chip also comprises the logarithmic amplifier AD8310 chip being connected with CC1101 chip.
Described transmitter also comprises amplifier and attenuator between radio frequency antenna apparatus and CC1101 chip.
Described display device adopts LCD display.
Described transmitter and receiver is all provided with built-in power, and described built-in power adopts rechargeable battery.
Described emission switch and receiving key are selected for the frequency of control wave.
Described hand-held shield effectiveness detector is the miniaturization of domestic first cover, digitizing screen effect checkout equipment, adopt first totally digitilized scheme to solve transmitting, receive, shield to imitate and measure, solved screen effect measure in the not only measurement requirement of " quantitatively " but also " fixed point ", for screened room is pinpointed the problems in daily screen effect is measured with the user who shields shelter, dealing with problems provides powerful mean, and solved the miniaturization of magnetic field sending and receiving antennas and interchange issues, 180 ° of turning problem, introduced be less than ± 1dB of measuring error.
Described hand-held shield effectiveness detector is mainly used in daily Performance Detection and the performance maintenance of the screened room shield effectiveness of each concerning security matters unit.Especially Dui Ge field army shield daily Performance Detection and the performance maintenance of shelter shield effectiveness, for the user of screened room or shielding shelter, to grasp at any time the special product of its shielding properties index custom-made, be particularly suitable for those department and units that need to grasp constantly the shielding properties index of the screened room that oneself uses or shielding shelter and use, as entire PLA's concerning security matters system, state's secrecy system, in do the communication commanding system etc. of the armies such as communication commanding system, naval, air force, Second Artillery Force of concerning security matters system, People's Armed Police's concerning security matters system, each army of large group.All units with concerning security matters screened room and traffic guidance's shelter all need a set of complete oneself to detect system, ways and means, all need to be equipped with this equipment.The security assurance information of Er Dui concerning security matters unit, army is defeated to the local war under complex electromagnetic environment, will there is high political significance, military significance and huge social benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the hand-held shield effectiveness detector that provides of the utility model.
Embodiment
Hand-held shield effectiveness detector as shown in Figure 1, comprises and sends the transmitter of pulse signal, the receiver of return pulse signal and radio frequency antenna apparatus, described radio frequency antenna apparatus is arranged on transmitter and receiver respectively.Described radio frequency antenna apparatus is magnetic field antenna or the electric field antenna that comprises LC resonant circuit.
Described transmitter comprises transmitting change-over switch, LCD display device, CC1101 chip and AD9851 chip, all by MCU chip transmitting microprocessor, control, described transmitting change-over switch is for controlling the pulse signal frequency of transmitting, described AD9851 chip is all connected with reference frequency source with CC1101 chip, and described pulse signal sends by radio frequency antenna apparatus.
Described receiver comprises radiofrequency signal receiving chip, LCD display device, receives change-over switch, by MCU chip, receiving microprocessor controls, described reception change-over switch is for switching the pulse signal that receives different frequency, receive with MCU chip the logarithmic amplifier AD8310 chip in addition that microprocessor is connected, described transmitter also comprises amplifier and attenuator between radio frequency antenna apparatus and CC1101 chip.
The pulse signal frequency that described transmitter sends is 14kHz, 434MHz, 915MHz and 150kHz.
Further, described transmitter and receiver is all provided with built-in power, and described built-in power adopts rechargeable battery.
Described hand-held shield effectiveness detector is according to GJB GJB5792-2006, national secret standard BMB3-1999, Military Electronic Equipment shelter standard GJB6785-2009, develop for the feature of shield effectiveness requirement, information leakage and the communication of the shields such as screened room and shielding shelter.Mainly solving shielding shelter and screened room in use particularly uses performance after, two year to decline gradually, can screen effect index meet the test problems constantly of actual needs, the screened room user that the customers that face are concerning security matters, needs the user of the shielding shelter of electromagnetic screen protection.Project is chosen 150k, 434M, 915M is the test frequency 14k of shielding shelter, the test frequency that 434M, 915M are screened room, has transmitting and receives autorun, and receiving end shows the screen effect measured value of diverse location automatically constantly, does not need frequency spectrograph.Easy and simple to handlely to only gently pressing, can realize screen effect and measure.
Transmitting terminal shows 2 row, respectively transmission frequency and level, level unit is that unit is dB μ V, and receiving end shows 4 row, receive frequency, calibration, actual measurement and screen effect, the unit of calibration value is dB μ V, actual measurement is the test value of equipment, the dB μ V of unit, and finally screen effect is the screen effect value of equipment, the dB of unit reads after equipment is stable together with test value.
If need change to measure frequency, stir transmitting change-over switch and receive change-over switch, adjust to same frequency.
When measuring application, first emitting antenna, receiving antenna (dual-mode antenna regardless of) are connected with transmitter, receiver respectively, antenna should be same frequency, opens the power supply of transmitter and receiver, press frequency keying, receiver, transmitter are switched to same frequency.Dual-mode antenna is placed in to coplanar state, distance is the wall thickness of actual measured body, presses the state button of receiver, and the measured value under the unmask state showing on receiver saves as standard value in advance, this value should be recalibrated during switching frequency till remaining to always and changing frequency values.The different parts of measured object is measured, and distance when now dual-mode antenna distance is wanted with calibration is consistent.The screen effect value of reading to show on receiver, is the screen effect value at this position of measured body.
Project has a set of complete detection system of one's own, have measure dynamic range large (more than can reaching 90dB), measuring accuracy high (± 1dB), volume little (handle type), the feature such as lightweight, portable, price is low, strong adaptability (working temperature-10-40 ℃, humidity 80%), be that the screen effect that aims at all kinds of shields that using is tested oneself, repetition measurement and the special intelligent type checkout equipment developed, be particularly suitable for each field army, each confidential system concerning security matters unit is detected the daily screen effect of the existing shielding shelter in use, screened room.
Claims (10)
1. a hand-held shield effectiveness detector, is characterized in that: comprise and send the transmitter of pulse signal, the receiver of return pulse signal and radio frequency antenna apparatus, described radio frequency antenna apparatus is arranged on respectively on transmitter and receiver;
Described transmitter comprises transmitting microprocessor, the emission switch, display device, the emission of radio frequency signals chip that are connected with transmitting microprocessor; Described receiver comprises reception microprocessor, the radiofrequency signal receiving chip, display device, the receiving key that are connected with reception microprocessor;
Described emission of radio frequency signals chip and radiofrequency signal receiving chip adopt CC1101 chip.
2. hand-held shield effectiveness detector according to claim 1, is characterized in that: described transmitting microprocessor and reception microprocessor adopt MCU chip.
3. hand-held shield effectiveness detector according to claim 1, is characterized in that: described emission of radio frequency signals chip also comprises AD9851 chip, and described AD9851 chip is all connected with reference frequency source with CC1101 chip.
4. hand-held shield effectiveness detector according to claim 1, is characterized in that: described radio frequency antenna apparatus is magnetic field antenna or electric field antenna, comprises LC resonant circuit.
5. hand-held shield effectiveness detector according to claim 1, is characterized in that: the pulse signal frequency that described transmitter sends is 14kHz, 434MHz, 915MHz and 150kHz.
6. hand-held shield effectiveness detector according to claim 1, is characterized in that: described radiofrequency signal receiving chip also comprises the logarithmic amplifier AD8310 chip being connected with CC1101 chip.
7. hand-held shield effectiveness detector according to claim 1, is characterized in that: described transmitter also comprises amplifier and attenuator between radio frequency antenna apparatus and CC1101 chip.
8. hand-held shield effectiveness detector according to claim 1, is characterized in that: described display device adopts LCD display.
9. hand-held shield effectiveness detector according to claim 1, is characterized in that: described transmitter and receiver is all provided with built-in power, and described built-in power adopts rechargeable battery.
10. hand-held shield effectiveness detector according to claim 1, is characterized in that: described emission switch and receiving key are selected for the frequency of control wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420323202.5U CN203981794U (en) | 2014-06-17 | 2014-06-17 | Hand-held shield effectiveness detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420323202.5U CN203981794U (en) | 2014-06-17 | 2014-06-17 | Hand-held shield effectiveness detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203981794U true CN203981794U (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420323202.5U Expired - Lifetime CN203981794U (en) | 2014-06-17 | 2014-06-17 | Hand-held shield effectiveness detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN203981794U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101800A (en) * | 2014-06-17 | 2014-10-15 | 北京大泽科技有限公司 | Handheld shielding effectiveness detection instrument |
| CN111122987A (en) * | 2019-12-26 | 2020-05-08 | 华北电力大学 | Magnetic field shielding effectiveness prediction method and system |
-
2014
- 2014-06-17 CN CN201420323202.5U patent/CN203981794U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101800A (en) * | 2014-06-17 | 2014-10-15 | 北京大泽科技有限公司 | Handheld shielding effectiveness detection instrument |
| CN111122987A (en) * | 2019-12-26 | 2020-05-08 | 华北电力大学 | Magnetic field shielding effectiveness prediction method and system |
| CN111122987B (en) * | 2019-12-26 | 2020-12-04 | 华北电力大学 | Magnetic field shielding effectiveness prediction method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141203 |