CN106658567B - Mobile communication terminal detection equipment - Google Patents
Mobile communication terminal detection equipment Download PDFInfo
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- CN106658567B CN106658567B CN201611128004.3A CN201611128004A CN106658567B CN 106658567 B CN106658567 B CN 106658567B CN 201611128004 A CN201611128004 A CN 201611128004A CN 106658567 B CN106658567 B CN 106658567B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/26—Monitoring; Testing of receivers using historical data, averaging values or statistics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Quality & Reliability (AREA)
- Probability & Statistics with Applications (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a mobile terminal detection device based on signal intensity. The device is characterized by portability, radio frequency signal-based nondestructive detection and short-distance detection in a small range. The equipment related by the invention mainly monitors the intensity and the variation value of the radio frequency signal between the mobile terminal and the base station. And directionally monitoring the frequency point of the uplink signal radio frequency of the mobile terminal, and if an uplink signal source exists, judging the existence of the mobile terminal equipment.
Description
Technical Field
The invention relates to the technical field of communication, in particular to mobile communication terminal detection equipment.
Background
The detection equipment of the existing market volume production is mainly based on X-ray irradiation and metal detection. The X-ray detection equipment is large in size, high in cost and poor in portability, and can only be deployed in fixed places. Because of the inevitable radiation and great harm to human body, the test can not be carried out on human body, and only the articles in the case can be checked. When the mobile communication terminal equipment is placed in a case, the X-ray detection equipment can only see the outline in the display, and the resolution of the test result is not high. The metal detector can only detect the mobile communication terminal with more metal structures and cannot identify other daily necessities with metal. Even if the alarm is triggered, the article types cannot be distinguished under the scene that the bag is not opened.
At present, no device can well meet the requirements of relevant mobile portable, accurate and quick detection, and no technology can discriminate the detection result.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a mobile communication terminal detection device based on signal intensity. The device is characterized by portability, radio frequency signal-based nondestructive detection and short-distance detection in a small range. The device of the invention mainly monitors the intensity and the variation value of the radio frequency signal between the mobile communication terminal and the base station. And directionally monitoring the frequency point of the uplink signal radio frequency of the mobile communication terminal, and if an uplink signal source exists, judging the existence of the mobile communication terminal equipment. The product related to the invention is a simple receiving device in the using process, does not emit electromagnetic waves in any form to the outside, is safe and free from radiation, and has no any additional effect on personnel in a detection area.
The specific scheme is as follows:
a mobile communication terminal detection device comprises a radio frequency signal receiving module, a storage module, a signal acquisition and processing module, an input module and a display module,
the radio frequency signal receiving module comprises a receiving antenna, a radio frequency switch circuit, a filter circuit and an amplifying circuit, wherein the receiving antenna is electrically connected with the radio frequency switch circuit, the radio frequency switch circuit is electrically connected with the filter circuit, the filter circuit is electrically connected with the amplifying circuit,
the amplifying circuit is electrically connected with the signal acquisition and processing module, the signal acquisition and processing module storage module is electrically connected with the storage module,
the storage module is used for storing a first signal intensity average value of a frequency domain signal and a second signal intensity average value of a time domain signal corresponding to a background radio signal within a period of time, which are acquired under the condition that all mobile communication terminals in a detection area are ensured to be closed;
the signal acquisition and processing module is used for acquiring the current actual radio signal in the detection area; respectively obtaining a third signal intensity average value of a corresponding frequency domain signal and a fourth signal intensity average value of a corresponding time domain signal within a period of time of the actual radio signal within a period of time; comparing the first signal intensity average value with the third signal intensity average value, calculating the difference value of the first signal intensity average value and the third signal intensity average value, comparing the second signal intensity average value with the fourth signal intensity average value, and calculating the difference value of the second signal intensity average value and the fourth signal intensity average value; if the third signal intensity average value is larger than the first signal intensity average value and the difference value between the third signal intensity average value and the first signal intensity average value is larger than the first threshold value, the fourth signal intensity average value is larger than the second signal intensity average value and the difference value between the fourth signal intensity average value and the second signal intensity average value is larger than the second threshold value, the mobile communication terminal is judged to be detected in the detection area, and if the mobile communication terminal is not detected.
The input module and the display module are respectively electrically connected with the signal acquisition and processing module.
Further, the storage module is further configured to store the waveform of the radio signal in the uplink frequency band of the mobile communication terminal in advance, the signal acquisition and processing module extracts the waveform characteristics of the signal, compares the similarity between the waveform characteristics of the actual radio signal in the uplink frequency band of the mobile communication terminal and the waveform characteristics stored in advance, and determines that the mobile communication terminal is detected if the similarity is greater than a third threshold and a condition for determining that the mobile communication terminal is detected in the signal acquisition and processing module is simultaneously satisfied, otherwise, the mobile communication terminal is not detected.
And the warning module is electrically connected with the signal acquisition and processing module, and sends out an alarm prompt when the signal acquisition and processing module judges and detects the signal of the mobile communication terminal.
Furthermore, the system also comprises an extension module, wherein the extension module is electrically connected with the signal acquisition and processing module, and the extension module is used for upgrading the signal acquisition and processing module.
Further, the radio frequency signal receiving module detects an uplink signal of the mobile communication terminal for data communication through a cellular mobile network, bluetooth and WIFI.
The radio frequency signal receiving module is switched to an uplink frequency band when the mobile communication terminal communicates through a radio frequency switch circuit, and the receiving antenna performs cyclic scanning on the uplink frequency band.
The invention has the beneficial effects that: the invention has higher portability, accuracy and practicability. The device provided by the invention can be deployed in an airport, a gateway, an examination room or a temporary inspection station. The concealed mobile communication terminal can be found through the radio frequency signal of the mobile communication terminal. As long as the mobile communication terminal is started, the mobile communication terminal can be in data communication with the base station, so that the standby mobile communication terminal can be detected, and the mobile communication terminal in a call or accessing the internet through 3G or 4G can also be detected. The detection mode of the whole equipment is based on passive signal detection, does not actively transmit any signal, has no electromagnetic radiation, no radio frequency pollution and no influence on human health.
The signal acquisition and processing module of the device acquires a signal reference value under a test environment through pre-testing, compares the acquired mobile communication terminal signal with the reference value during actual detection to accurately judge whether the mobile communication terminal signal is detected, and in addition, tests are carried out for multiple times to improve the detection precision.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a flow chart of a signal acquisition and processing module according to an embodiment of the present invention;
FIG. 3 is a time domain signal diagram of a background radio signal in accordance with an embodiment of the present invention;
fig. 4 is a frequency domain signal diagram of a background radio signal according to an embodiment of the invention.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. The invention will now be further described with reference to the accompanying drawings and detailed description.
The mobile communication terminal has normal data communication with the base station under the condition of starting up, and is divided into an uplink signal and a downlink signal according to the direction of quantity transmission. The uplink signal is a signal sent by the mobile communication terminal to the base station, and the downlink signal is a signal sent by the base station to the mobile communication terminal. Generally, in a short distance from a mobile communication terminal, the signal strength of the mobile communication terminal when sending data is much greater than that of the base station. Particularly, the mobile communication terminal is more obvious in the situations of conversation and data transmission, and the strength of the mobile communication terminal is often dozens of times of that of the mobile communication terminal in standby. Therefore, the existence of the mobile communication terminal can be judged by detecting the strength and the change of the signal (the signal of the uplink frequency band) transmitted by the mobile communication terminal in a short distance and shielding the interference of the base station and other external signals. The presence of the mobile communication terminal can be determined.
Fig. 1 is a schematic structural diagram of the present invention, which includes a radio frequency signal receiving module, a storage module, a signal collecting and processing module, an input module, a display module, a warning module, and an expansion module.
The radio frequency signal receiving module comprises a receiving antenna, a radio frequency switch circuit, a filter circuit and an amplifying circuit, wherein the receiving antenna is electrically connected with the radio frequency switch circuit, the radio frequency switch circuit is electrically connected with the filter circuit, the filter circuit is electrically connected with the amplifying circuit, the amplifying circuit is electrically connected with the signal collecting and processing module, the input module and the display module are respectively electrically connected with the signal collecting and processing module, the radio frequency signal receiving module is switched to an uplink frequency band when the mobile communication terminal communicates through the radio frequency switch circuit, the receiving antenna carries out cyclic scanning on the uplink frequency band, and the uplink signal of the mobile communication terminal carrying out data communication through a cellular mobile network is detected. In certain cases, the receiving antenna can perform broadband scanning. In order to improve the accuracy of detection, the filter circuit carries out filtering processing on the received uplink signal, then carries out signal amplification through the amplifying circuit, and sends the uplink signal to the signal acquisition and processing module. The receiving antenna of the device of the embodiment has stronger directivity, and the signal receiving strength in a specific direction can be obviously stronger than that in other directions. The non-effective receiving area of the receiving antenna is added with signal shielding measures, so that the equipment can prevent other non-signals from interfering the test result. In another embodiment, the radio frequency signal receiving module may be configured to receive other outgoing signals of the mobile communication terminal, such as bluetooth or WIFI signals.
The storage module is electrically connected with the signal acquisition and processing module and is used for storing a first signal average value of a frequency domain signal and a second signal average value of a time domain signal corresponding to a background radio signal during testing of the mobile communication terminal.
It should be noted that, when the device of the present invention is used to detect the mobile communication terminal, a pretest is required to be performed: under the condition of ensuring that all mobile communication terminals in a detection area are closed, acquiring a background radio signal in the detection area; and respectively obtaining a first signal intensity average value of a frequency domain signal corresponding to the background radio signal and a second signal intensity average value of a time domain signal within a period of time.
Fig. 2 is a processing flow chart of a signal acquisition and processing module according to an embodiment of the present invention, in which the signal acquisition and processing module respectively obtains a first signal strength average value of a frequency domain signal and a second signal strength average value of a time domain signal corresponding to an actual radio signal after receiving the actual radio signal; comparing the first signal intensity average value with the third signal intensity average value in the comparison storage module, calculating the difference value of the first signal intensity average value and the third signal intensity average value, comparing the second signal intensity average value with the fourth signal intensity average value in the comparison storage module, and calculating the difference value of the second signal intensity average value and the fourth signal intensity average value; if the third signal intensity average value is larger than the first signal intensity average value and the difference value between the third signal intensity average value and the first signal intensity average value is larger than the first threshold value, the fourth signal intensity average value is larger than the second signal intensity average value and the difference value between the fourth signal intensity average value and the second signal intensity average value is larger than the second threshold value, the mobile communication terminal is judged to be detected in the detection area, and if the mobile communication terminal is not detected.
In another embodiment, the storage module is further configured to pre-store the waveform of the radio signal in the uplink frequency band of the mobile communication terminal, the signal acquisition and processing module extracts the waveform feature of the signal, compares the similarity between the waveform feature of the actual radio signal in the uplink frequency band of the mobile communication terminal and the pre-stored waveform feature, and determines that the mobile communication terminal is detected if the similarity is greater than a third threshold and a condition for determining that the mobile communication terminal is detected in the signal acquisition and processing module is simultaneously satisfied, otherwise, the mobile communication terminal is not detected.
The warning module is electrically connected with the signal acquisition and processing module, and the warning module sends out an alarm prompt when the signal acquisition and processing module judges that the mobile communication terminal signal is detected.
The extension module is electrically connected with the signal acquisition and processing module and is used for upgrading the signal acquisition and processing module.
Fig. 3 is a time domain signal diagram of a background radio signal according to an embodiment of the present invention, wherein a single frequency point is determined within a certain period of time, for example, the environment is an ideal environment of a laboratory, and the test result should be constant. But the actual environment inevitably receives interference from other radio waves outside. Therefore, before testing, the background radio wave in a period of time can be averaged, i.e. can be regarded as a reference of the scene place at this frequency point. The signal is a waveform recorded at a single frequency point for a long time. As can be seen from the figure, there are some short-time hopping interferences, and after the signals on the time axis are averaged, the influence of the interferences on the test result can be eliminated or reduced.
Fig. 4 is a frequency domain signal diagram of the background radio signal in this embodiment, if there is fixed interference at a specific frequency point, noise reduction processing may be performed by using a specific algorithm, and before the determination and the display result are displayed, the interference at the fixed frequency points is eliminated. For example, the signals in a small signal interval adjacent to the left and right of the frequency point can be averaged, so that the influence of the interference on the test result can be eliminated.
The signal acquisition and processing module of the device acquires a signal reference value under a test environment through a pretest, compares the acquired mobile communication terminal signal with the reference value during actual detection to accurately judge whether the mobile communication terminal signal is detected, and in addition, the pretest is carried out to improve the detection precision.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A mobile communication terminal detection device is characterized by comprising a radio frequency signal receiving module, a storage module, a signal acquisition and processing module, an input module and a display module,
the radio frequency signal receiving module comprises a receiving antenna, a radio frequency switch circuit, a filter circuit and an amplifying circuit, wherein the receiving antenna is electrically connected with the radio frequency switch circuit, the radio frequency switch circuit is electrically connected with the filter circuit, the filter circuit is electrically connected with the amplifying circuit,
the amplifying circuit is electrically connected with the signal acquisition and processing module, the signal acquisition and processing module is electrically connected with the storage module,
the storage module is used for storing a first signal intensity average value of a frequency domain signal and a second signal intensity average value of a time domain signal corresponding to a background radio signal within a period of time, which are acquired under the condition that all mobile communication terminals in a detection area are ensured to be closed;
the signal acquisition and processing module is used for acquiring actual radio signals of an uplink frequency band of the mobile communication terminal in the detection area; respectively acquiring a third signal intensity average value of the actual radio signal corresponding to the frequency domain signal and a fourth signal intensity average value of the time domain signal within a period of time; comparing the first signal intensity average value with the third signal intensity average value, calculating the difference value of the first signal intensity average value and the third signal intensity average value, comparing the second signal intensity average value with the fourth signal intensity average value, and calculating the difference value of the second signal intensity average value and the fourth signal intensity average value; if the third signal intensity average value is larger than the first signal intensity average value and the difference value between the third signal intensity average value and the first signal intensity average value is larger than the first threshold value, the fourth signal intensity average value is larger than the second signal intensity average value and the difference value between the fourth signal intensity average value and the second signal intensity average value is larger than the second threshold value, the mobile communication terminal is judged to be detected in the detection area, otherwise, the mobile communication terminal is not detected;
the input module and the display module are respectively electrically connected with the signal acquisition and processing module.
2. The mobile communication terminal detection device according to claim 1, wherein: the storage module is also used for pre-storing the waveform of the radio signal of the uplink frequency band of the mobile communication terminal, the signal acquisition and processing module extracts the waveform characteristics of the signal, compares the similarity between the waveform characteristics of the actual radio signal of the uplink frequency band of the mobile communication terminal and the pre-stored waveform characteristics, and judges that the mobile communication terminal is detected if the similarity is greater than a third threshold and simultaneously meets the condition that the mobile communication terminal is judged to be detected in the signal acquisition and processing module, otherwise, the mobile communication terminal is not detected.
3. The mobile communication terminal detection device according to claim 1, wherein: the mobile communication terminal further comprises a warning module, the warning module is electrically connected with the signal acquisition and processing module, and the warning module sends out an alarm prompt when the signal acquisition and processing module judges that the mobile communication terminal signals are detected.
4. The mobile communication terminal detection device according to claim 1, wherein: the system also comprises an extension module, wherein the extension module is electrically connected with the signal acquisition and processing module and is used for upgrading the signal acquisition and processing module.
5. The mobile communication terminal detection device according to claim 1, wherein: the radio frequency signal receiving module detects uplink signals of the mobile communication terminal for data communication through a cellular mobile network, Bluetooth and WIFI.
6. The mobile communication terminal detection device according to claim 1, wherein: the radio frequency signal receiving module is switched to an uplink frequency band when the mobile communication terminal communicates through a radio frequency switch circuit, and the receiving antenna carries out cyclic scanning on the uplink frequency band.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611128004.3A CN106658567B (en) | 2016-12-09 | 2016-12-09 | Mobile communication terminal detection equipment |
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| CN201611128004.3A CN106658567B (en) | 2016-12-09 | 2016-12-09 | Mobile communication terminal detection equipment |
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| CN106658567B true CN106658567B (en) | 2020-05-22 |
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| CN110022566B (en) * | 2018-01-10 | 2022-05-27 | 深圳捷豹电波科技有限公司 | Wireless communication control method, radio device and apparatus |
| CN109120358B (en) * | 2018-06-13 | 2021-10-22 | 北京星网锐捷网络技术有限公司 | Wireless radio frequency signal testing method, mobile terminal, surveying equipment and system |
| US11197174B1 (en) | 2020-07-15 | 2021-12-07 | Shenzhen Jaguar Wave Technology Ltd. | Method for controlling wireless communication, radio device, and storage device |
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| WO2010087187A1 (en) * | 2009-01-30 | 2010-08-05 | 三洋電機株式会社 | Notifying method and wireless device |
| CN103238347A (en) * | 2012-12-27 | 2013-08-07 | 华为技术有限公司 | Method and device for power control |
| CN105099964A (en) * | 2014-05-07 | 2015-11-25 | 电信科学技术研究院 | Method and equipment for estimating power intensity and determining interference cell |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4189656B2 (en) * | 2003-04-28 | 2008-12-03 | 日本電気株式会社 | Mobile phone antenna switching method using AGC receiver and mobile terminal thereof |
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| CN1776439A (en) * | 2005-12-08 | 2006-05-24 | 东南大学 | Detection device for sensing radio front-end radiofrequency signal |
| WO2010087187A1 (en) * | 2009-01-30 | 2010-08-05 | 三洋電機株式会社 | Notifying method and wireless device |
| CN103238347A (en) * | 2012-12-27 | 2013-08-07 | 华为技术有限公司 | Method and device for power control |
| CN105099964A (en) * | 2014-05-07 | 2015-11-25 | 电信科学技术研究院 | Method and equipment for estimating power intensity and determining interference cell |
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