CN101123762A - Shielding method and device for environment protection mobile signals - Google Patents
Shielding method and device for environment protection mobile signals Download PDFInfo
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- CN101123762A CN101123762A CNA2007100560893A CN200710056089A CN101123762A CN 101123762 A CN101123762 A CN 101123762A CN A2007100560893 A CNA2007100560893 A CN A2007100560893A CN 200710056089 A CN200710056089 A CN 200710056089A CN 101123762 A CN101123762 A CN 101123762A
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Abstract
The invention discloses an eco-friendly mobile signal shielding method and a device consisting of a cell phone signal detection, a determination control and a shielding signal emission. The detection part detects the cell phone band signal, tells uplink signal from downlink signal, filters signal out of band and downlinks signal to the determination control part, sends detected signal to CPU in the form of high-low level through an amplifier circuit and a detector circuit, undergoes band determination about detected signal, and outputs control signal; the shielding signal emission part receives signal outputted by CPU and controls operation of a relay so that a corresponding emission module works and produces interference signal within assignment time to shield the detected frequency. The invention only performs shielding function when received cell phone signal, each band is controlled separately without mutual interference, opening time of a mobile signal shielding instrument is shortened in maximum range and environmental protection is achieved.
Description
Technical field
The present invention discloses a kind of environment-friendly type movable signal screen method and device, is used for the communication shielding of mobile phone, belongs to the Communication Equipment technical field.
Background technology
Information age, communication technology high speed development, mobile phone have become people's daily life and the indispensable important tool of work.The mobile communication of phone brings us and also brings negative effect simultaneously fast and easily, promptly utilizes the mobile phone cheating, utilizes the interference that mobile phone steals information, ringing sound of cell phone is normally learnt, worked people.Therefore,, mobile phone signal is blocked, make the mobile phone silence become pressing for of country and people in suitable place.
In order to prevent that above-mentioned situation from taking place, the most direct method is by the signal shielding instrument mobile phone signal to be isolated, and makes mobile phone not receive signal.But mainly there is following problem in the signal shielding instrument: long time continuous working, the long-term radiation human body of microwave can cause discomfort on the health to some people to electromagnetic radiation sensitivity, is harmful to health.And the frequency great majority of emission all disturb the upward signal of UNICOM, mobile base station, have a strong impact on the normal operation of mobile communication; Product is subject to temperature, environmental impact, does not have automatic compensation function; Product exists the tranmitting frequency coverage narrow, can not block the mutual communication between mobile phone on the market at present fully, and its practicality is affected.
Summary of the invention:
The present invention discloses a kind of environment-friendly type movable signal screen method, utilizes mobile phone signal to start shielding work, has solved the long-time phase use of shielded signal, to the health effects problem.
The invention also discloses a kind of environment-friendly type movable signal screening arrangement, overcome existing mobile phone shielding instrument and worked long hours, the function of shielding that only moves the signal shielding instrument when receiving mobile phone signal just begins to work.
Technical solution of the present invention is as follows: comprise the mobile phone signal testing circuit, judge that control circuit and shielded signal radiating circuit three parts constitute, wherein, the mobile phone signal testing circuit is surveyed the mobile phone frequency band signals by band pass filter, and distinguish upward signal and downstream signal, control circuit is judged in input behind out-of-band signal of filtering and the downstream signal; Judge that control circuit is detected signal to be formed high-low level by amplification and detection give CPU, detected signal is carried out frequency range to be judged, to export different signal control relay actions, the corresponding power emission module work of control shielding signal transmission circuit, in the time of appointment, produce interference signal, institute's measured frequency is shielded.
The masked segment of environment-friendly type movable signal shielding instrument is connected by control section with probe portion, and masked segment is divided into four mask segments.When near probe portion detects mobile phone signal being arranged, control section is opened corresponding mask segments, and other mask segments are in closed condition.Avoid long-time outwards emission shielded signal.
The above-mentioned fixed time is that required maximum time is linked up in institute's survey mobile phone and the foundation of machine station.
The concrete structure of screening arrangement of the present invention is as follows:
Constitute by mobile phone signal testing circuit, judgement control circuit and shielded signal radiating circuit three parts, wherein,
In the mobile phone signal testing circuit, after antenna receives the mobile phone frequency band signals, send into electronic switch through band-pass filter and switch; Signal after the switching is amplified by power amplifier sends into wave detector, and the output voltage signal of wave detector connects the cpu signal end of judging control circuit, carries out analog-to-digital conversion, after signal is handled, by the work of relay control shielding signal transmission circuit;
In the shielded signal radiating circuit, sawtooth signal generator output sawtooth signal connects voltage controlled oscillator, converts voltage signal to frequency signal output, sends into antenna output after amplifying through power amplifier again.
Good effect of the present invention is: adopt the mobile phone signal testing circuit, judge control circuit and shielded signal radiating circuit, the function of shielding that only moves the signal shielding instrument when receiving mobile phone signal just begins to work, four frequency ranges are independently controlled, do not disturb mutually, and be that the corresponding frequency range that is detected is shielded, the function of shielding of other frequency ranges is still closed, only when detecting mobile phone signal, just can beat the corresponding frequency band of environment-friendly type movable signal shielding instrument, reach environment protecting, this has just shortened movable signal shielding instrument in scope to greatest extent opening time, reached the purpose of environmental protection.
Description of drawings
Fig. 1 is a circuit logic diagram of the present invention;
Fig. 2 is the element circuit figure of shielded signal radiating circuit of the present invention.
Embodiment
Embodiment 1
According to shown in Figure 1, this environment-friendly type movable signal screening arrangement is made of mobile phone signal testing circuit, judgement control circuit and shielded signal radiating circuit three parts, wherein,
The mobile phone signal testing circuit comprises: reception antenna, and bandpass filtering, high frequency amplifies, power detection, and waveform transformation;
After four mobile phone frequency band signals 800MHz, 900MHz, 1800MHz and 1900MHz received by antenna, signal was sent into electronic switch SW1 and SW2 and is switched through after BPF1, BPF2, BPF3 and four band-pass filter of BPF4; Signal after the switching is sent into wave detector DET1 and DET2 after sending into power amplifier PF1 and PF2 amplification, and the detection slope is 20mV/dB, and the detection slope of wave detector is adjusted by the resistance external with it;
In judging control circuit, the output voltage signal of wave detector connects single-chip microcomputer (CPU) signal end and carries out analog-to-digital conversion, after handle signal CPU inside, by relay R E1, RE2, RE3 and RE4 power controlling transmitter module;
The shielded signal radiating circuit is made of four mask segments can independently controlling sawtooth signal generator, voltage controlled oscillator, power amplifier and antenna, adopt voltage controlled oscillator to produce radiofrequency signal, the control signal of VCO connects voltage controlled oscillator by sawtooth signal generator NE555 output sawtooth signal, convert voltage signal to frequency signal output, send into antenna output after amplifying through power amplifier again.
Claims (2)
1. environment-friendly type movable signal screen method, comprise the mobile phone signal testing circuit, judge that control circuit and shielded signal radiating circuit three parts constitute, wherein, the mobile phone signal testing circuit is surveyed the mobile phone frequency band signals by band pass filter, and distinguish upward signal and downstream signal, control circuit is judged in input behind out-of-band signal of filtering and the downstream signal; Judge that control circuit is detected signal to be formed high-low level by amplification and detection give CPU, detected signal is carried out frequency range to be judged, to export different signal control relay actions, the corresponding power emission module work of control shielding signal transmission circuit, in the time of appointment, produce interference signal, institute's measured frequency is shielded.
2. an environment-friendly type movable signal screening arrangement is characterized in that by the mobile phone signal testing circuit, judges that control circuit and shielded signal radiating circuit three parts constitute, wherein,
In the mobile phone signal testing circuit, after antenna receives the mobile phone frequency band signals, send into electronic switch through band-pass filter and switch; Signal after the switching is amplified by power amplifier sends into wave detector, and the output voltage signal of wave detector connects the cpu signal end of judging control circuit, carries out analog-to-digital conversion, after signal is handled, by the work of relay control shielding signal transmission circuit;
In the shielded signal radiating circuit, sawtooth signal generator output sawtooth signal connects voltage controlled oscillator, converts voltage signal to frequency signal output, sends into antenna output after amplifying through power amplifier again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100560893A CN101123762A (en) | 2007-09-19 | 2007-09-19 | Shielding method and device for environment protection mobile signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100560893A CN101123762A (en) | 2007-09-19 | 2007-09-19 | Shielding method and device for environment protection mobile signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101123762A true CN101123762A (en) | 2008-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100560893A Pending CN101123762A (en) | 2007-09-19 | 2007-09-19 | Shielding method and device for environment protection mobile signals |
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| CN (1) | CN101123762A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701555A (en) * | 2014-01-13 | 2014-04-02 | 泉州市华众电子科技有限公司 | Method and system for reducing false alarm rate of cell phone signal detecting and shielding system |
| CN103713540A (en) * | 2014-01-13 | 2014-04-09 | 泉州市华众电子科技有限公司 | Control device of mobile phone signal shielding device |
| CN103619060B (en) * | 2013-12-12 | 2016-08-31 | 浙江嘉科电子有限公司 | A kind of intelligent shielding method of GSM communication terminal |
| CN106257850A (en) * | 2015-06-17 | 2016-12-28 | 凯瑟雷恩工厂两合公司 | For producing the method and system of interference signal |
| CN110474704A (en) * | 2019-08-12 | 2019-11-19 | 浙江三维通信科技有限公司 | Radio signal shielding method and device based on adjustable Sweep Source |
| CN111147158A (en) * | 2019-12-04 | 2020-05-12 | 杭州恒生数字设备科技有限公司 | Method for shielding multi-frequency WIFI signal |
| CN111211861A (en) * | 2020-01-19 | 2020-05-29 | 成都立鑫新技术科技有限公司 | Signal interference method of mobile terminal |
| CN113132053A (en) * | 2021-04-19 | 2021-07-16 | 浙江三维通信科技有限公司 | Control system signal transmitting method and device, storage medium and electronic device |
-
2007
- 2007-09-19 CN CNA2007100560893A patent/CN101123762A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103619060B (en) * | 2013-12-12 | 2016-08-31 | 浙江嘉科电子有限公司 | A kind of intelligent shielding method of GSM communication terminal |
| CN103701555A (en) * | 2014-01-13 | 2014-04-02 | 泉州市华众电子科技有限公司 | Method and system for reducing false alarm rate of cell phone signal detecting and shielding system |
| CN103713540A (en) * | 2014-01-13 | 2014-04-09 | 泉州市华众电子科技有限公司 | Control device of mobile phone signal shielding device |
| CN103713540B (en) * | 2014-01-13 | 2016-08-17 | 泉州市华众电子科技有限公司 | A kind of control device of cellular phone signal shielding device |
| CN103701555B (en) * | 2014-01-13 | 2016-08-31 | 泉州市华众电子科技有限公司 | A kind of system reducing detecting and shielding mobile phone signals system rate of false alarm |
| CN106257850A (en) * | 2015-06-17 | 2016-12-28 | 凯瑟雷恩工厂两合公司 | For producing the method and system of interference signal |
| CN110474704A (en) * | 2019-08-12 | 2019-11-19 | 浙江三维通信科技有限公司 | Radio signal shielding method and device based on adjustable Sweep Source |
| CN111147158A (en) * | 2019-12-04 | 2020-05-12 | 杭州恒生数字设备科技有限公司 | Method for shielding multi-frequency WIFI signal |
| CN111211861A (en) * | 2020-01-19 | 2020-05-29 | 成都立鑫新技术科技有限公司 | Signal interference method of mobile terminal |
| CN113132053A (en) * | 2021-04-19 | 2021-07-16 | 浙江三维通信科技有限公司 | Control system signal transmitting method and device, storage medium and electronic device |
| WO2022222243A1 (en) * | 2021-04-19 | 2022-10-27 | 浙江三维通信科技有限公司 | Method and apparatus for controlling system to transmit signal, and storage medium and electronic apparatus |
| CN113132053B (en) * | 2021-04-19 | 2023-02-21 | 浙江三维通信科技有限公司 | Control system signal transmitting method and device, storage medium and electronic device |
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Open date: 20080213 |