CN109286465B - Wireless signal shielding device and shielding method supporting input control of external alarm device - Google Patents
Wireless signal shielding device and shielding method supporting input control of external alarm device Download PDFInfo
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- CN109286465B CN109286465B CN201811125128.5A CN201811125128A CN109286465B CN 109286465 B CN109286465 B CN 109286465B CN 201811125128 A CN201811125128 A CN 201811125128A CN 109286465 B CN109286465 B CN 109286465B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/68—Jamming involving special techniques using passive jamming, e.g. by shielding or reflection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/88—Jamming or countermeasure characterized by its function related to allowing or preventing alarm transmission
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Abstract
The invention discloses a wireless signal shielding device supporting input control of an external alarm device and a shielding method, wherein the wireless signal shielding device comprises a voltage input module, a voltage comparison module, a waveform shaping module, an MCU control module, a power amplification module and a voltage controlled oscillator module, wherein the voltage input module is used for receiving input voltage, the voltage comparison module is used for comparing the value of the input voltage and outputting an alarm signal, the waveform shaping module is used for performing wave type integration on the alarm signal so as to output the integrated alarm signal, and the MCU control module is used for receiving and processing the integrated alarm signal so as to output a control instruction. When the wireless signal shielding device is used, the wireless signal shielding devices can be respectively placed in different classrooms, when an emergency occurs and needs to be operated, the external warning device can be pressed down, and the state control of the shielding device is completed according to a control instruction edited in advance.
Description
Technical Field
The invention relates to the technical field of wireless signal shielding, in particular to a wireless signal shielding device and a shielding method supporting input control of an external alarm device.
Background
The wireless signal shielding device is widely used in government agencies such as schools, and the following problems occur when the wireless signal shielding device in the prior art is deployed in schools:
1. when the wireless signal shielding device is used, communication signals such as mobile phone signals, WIFI signals and talkback signals can be blocked, and at the moment, if sudden events occur in an examination room, the communication is more passive when reporting to a superior, and the trouble is revealed.
2. The existing shielding device adopts a centralized control mode, centralized management is realized through a network, and the centralized control mode is uniformly completed by a center, the mode has insufficient emergency response, for example, the first time when a problem occurs is always at the front end instead of the center, and the timeliness of event processing can be influenced when the control right is at the center.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a wireless signal shielding device and shielding method supporting input control of an external alarm device, which is used to solve the problems of the prior art that communication is troublesome and emergency response is insufficient.
In order to achieve the above objects and other related objects, the present invention provides a wireless signal shielding device supporting input control of an external alarm, the wireless signal shielding device comprising a voltage input module, a voltage comparison module, a waveform shaping module, an MCU control module, a power amplification module, and a voltage controlled oscillator module, wherein the voltage input module is configured to receive an input voltage; the voltage comparison module is used for comparing the value of the input voltage so as to output an alarm signal; the waveform shaping module is used for performing waveform integration on the alarm signal so as to output the integrated alarm signal; the MCU control module is used for receiving and processing the integrated alarm signal so as to output a control instruction; the voltage-controlled oscillator module is used for generating a frequency signal required by the wireless signal shielding device and outputting the frequency signal to the power amplification module; and the power amplification module is used for receiving the control enabling signal and the control instruction transmitted by the MCU control module and receiving the frequency signal of the voltage-controlled oscillator module so as to turn on or turn off the radio frequency signal output end.
In an embodiment of the present invention, the wireless signal shielding device further includes an external alarm, and the external alarm is connected to the voltage input module.
In an embodiment of the present invention, the voltage comparing module includes a voltage comparator, the model of the voltage comparator is an LM293D chip, and the LM293D chip is connected to the voltage input module.
In an embodiment of the invention, the LM293D chip is used for detecting an input voltage, and when the input voltage is lower than 1.2V, the LM293D chip detects that the input voltage is at a low level, and when the input voltage is higher than 3V, the LM293D chip detects that the input voltage is at a high level.
In an embodiment of the present invention, the waveform shaping module includes an inverter, the model of the inverter is 74HC14PW chip, the 74HC14PW chip is used for performing waveform integration on the alarm signal output by the LM293D chip, and the 74HC14PW chip is used for outputting the integrated alarm signal to the MCU control module.
In an embodiment of the present invention, the MCU control module includes a control chip and a latch chip, the control chip is an IAP15W4K61S4 chip, the latch chip is an SN74HC574PWR chip, both pin 3 and pin 4 of the IAP15W4K61S4 chip are configured to receive the integrated alarm signal and determine the integrated alarm signal, and pin 24 of the IAP15W4K61S4 chip is configured to output a control instruction to the SN74HC574PWR chip.
In an embodiment of the present invention, the power amplification module includes a power amplification chip, the model of the power amplification chip is an SKY77354 chip, and the pin 4 of the SKY77354 chip is configured to receive a control instruction output by the SN74HC574PWR chip to control a working state of the SKY77354 chip.
In order to achieve the above object, the present invention further provides a shielding method, including: receiving an input voltage; comparing the values of the input voltages to output an alarm signal; performing waveform integration on the alarm signal to output an integrated alarm signal; receiving and processing the integrated alarm signal to output a control instruction; generating a frequency signal required by a wireless signal shielding device; and opening or closing the radio frequency signal output end according to the control enabling signal, the control instruction and the frequency signal.
As described above, the wireless signal shielding device and the shielding method supporting the input control of the external alarm device according to the present invention have the following advantages:
the invention discloses a wireless signal shielding device supporting input control of an external alarm device, which comprises a voltage input module, a voltage comparison module, a waveform shaping module, an MCU control module, a power amplification module and a voltage controlled oscillator module.
The module of the invention is independent, easy to operate, users can choose the alarm input function according to the actual need, when not needing this function, the work of the wireless signal shielding device will not be influenced too.
Drawings
Fig. 1 is a block diagram of a wireless signal shielding device supporting input control of an external alarm according to an embodiment of the present application;
FIG. 2 is a data flow diagram of a voltage comparison module of a wireless signal shielding device supporting input control of an external alarm according to an embodiment of the present application;
FIG. 3 is a data flow diagram of an MCU control module of a wireless signal shielding device supporting input control of an external alarm device according to an embodiment of the present application;
fig. 4 is a flowchart of a masking method according to an embodiment of the present application.
Description of the element reference numerals
10 voltage input module
20 voltage comparison module
30 wave shaping module
40 MCU control module
50 power amplifying module
60 voltage controlled oscillator module
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Specifically, please refer to fig. 1, fig. 1 is a block diagram of a wireless signal shielding device supporting input control of an external alarm device according to an embodiment of the present application, and the wireless signal shielding device supporting input control of the external alarm device includes a voltage input module 10, a voltage comparison module 20, a waveform shaping module 30, an MCU control module 40, a power amplification module 50, and a voltage controlled oscillator module 60, where the voltage input module 10 is configured to receive an input voltage; a voltage comparison module 20, configured to compare values of the input voltage to output an alarm signal; a waveform shaping module 30, configured to perform waveform integration on the alarm signal to output an integrated alarm signal; the MCU control module 40 is used for receiving and processing the integrated alarm signal so as to output a control instruction; a voltage controlled oscillator module 60, configured to generate a frequency signal required by a wireless signal masker, and output the frequency signal to the power amplification module 50; and the power amplification module 50 is configured to receive the control enable signal and the control instruction transmitted by the MCU control module 40, and receive the frequency signal of the voltage controlled oscillator module 60, so as to turn on or turn off the rf signal output terminal.
The MCU control module 40 is a microprocessor control module.
The voltage controlled oscillator module 60 comprises a voltage controlled oscillator, which is a VCO, which is an important component of the radio frequency circuit.
Specifically, the waveform shaping module 30 is configured to perform waveform integration on the alarm signal, and perform waveform integration glitch removal on the alarm signal, so as to output the integrated alarm signal.
The wireless signal shielding device further comprises an external alarm, and the external alarm is connected with the voltage input module 10.
Specifically, the external alarm may be an external alarm with a level of 5V, an external alarm with a level of 3V, or an external alarm with a level of 4V.
The 5V external ALARM is installed at a place convenient for use, and the output line of the ALARM device is connected to an ALARM _ IN1 pin and a DGND pin of the voltage input module 10 of the wireless signal shield by cables.
Specifically, please refer to fig. 2, fig. 2 is a data flow diagram of a voltage comparison module of a wireless signal shielding device supporting input control of an external alarm device according to an embodiment of the present application; the voltage comparison module 20 comprises a voltage comparator, the model of the voltage comparator is an LM293D chip, and the LM293D chip is connected with the voltage input module 10.
The LM293D chip is used for detecting input voltage, and when input voltage is less than 1.2V, the LM293D chip detects that input voltage is the low level, and when input voltage is higher than 3V, the LM293D chip detects that input voltage is the high level.
When an alarm is pressed down from the outside, an input level quantity is generated, the input voltage is detected through the LM293D chip, the detection level is low when the external input level is below 1.2V, the detection level is high when the external input level is above 3V, the dual-voltage detection is completed through the pin 2, the pin 3, the pin 5 and the pin 6 of the LM293D chip, the pin 1 and the pin 7 of the LM293D chip are signal output pins, and signals after the level quantity comparison is completed are output.
The LM293D chip is a voltage comparator, signal burrs are generated during switching back and forth, in order to ensure the stability of signals, a 74HC14PW chip is added to shape the signals output by the LM293D chip after waveform shaping, ESD (electrostatic discharge) protection is achieved, and the signals shaped by the 74HC14PW chip are output to the MCU control module 40.
The waveform shaping module 30 includes an inverter, the type of the inverter is 74HC14PW chip, the 74HC14PW chip is used for performing waveform integration on the alarm signal output by the LM293D chip, and the 74HC14PW chip is used for outputting the integrated alarm signal to the MCU control module 40.
Specifically, please refer to fig. 3, fig. 3 is a data flow diagram of an MCU control module of a wireless signal shielding device supporting input control of an external alarm device according to an embodiment of the present application; the MCU control module 40 includes a control chip and a latch chip, the control chip is an IAP15W4K61S4 chip, the latch chip is an SN74HC574PWR chip, a pin 3 and a pin 4 of the IAP15W4K61S4 chip are both configured to receive the integrated alarm signal and determine the integrated alarm signal, and a pin 24 of the IAP15W4K61S4 chip is configured to output a control instruction to the SN74HC574PWR chip.
Specifically, the MCU control module 40 performs preset judgment on the integrated alarm signal, and sends a corresponding control instruction, and sends a data control instruction to the SN74HC574PWR chip through the pin 24.
The power amplification module 50 includes a power amplification chip, the model of the power amplification chip is an SKY77354 chip, and the pin 4 of the SKY77354 chip is used for receiving a control signal output by the SN74HC574PWR chip to control the working state of the SKY77354 chip.
The switch control pin of the SKY77354 chip receives a control signal transmitted by the SN74HC574PWR chip to carry out the on-off of the chip.
Specifically, the power amplification module 50 is further connected to an antenna.
If the enable control terminal of the SKY77354 chip is off, the power amplification module 50 outputs no shielding signal, and if the enable control terminal of the SKY77354 chip is on, the power amplification module 50 outputs a shielding signal.
Referring to fig. 4, fig. 4 is a flowchart of a shielding method according to an embodiment of the present application, and similar to the principle of the system embodiment, the present invention provides a shielding method, where the shielding method includes:
and S1, receiving the input voltage.
And S2, comparing the values of the input voltage to output an alarm signal.
And S3, performing waveform integration on the alarm signal to output the integrated alarm signal.
And S4, receiving and processing the integrated alarm signal to output a control instruction.
And S5, generating a frequency signal required by the wireless signal shielding device.
And S6, opening or closing the radio frequency signal output end according to the control enabling signal, the control command and the frequency signal.
When the device is used, the required control instruction is edited in advance through the centralized management platform or the MCU control module 40 to complete the state control of the shielding device.
Specifically, step S1 may occur in the voltage input module 10.
Step S2 may occur in the voltage comparison module 20.
Step S3 may occur in waveform shaping module 30.
Step S4 may occur in the MCU control module 40.
Step S5 may occur in the voltage controlled oscillator module 60.
Step S6 may occur in the power amplification module 50.
In summary, the wireless signal shielding device supporting the input control of the external alarm device comprises a voltage input module 10, a voltage comparison module 20, a waveform shaping module 30, an MCU control module 40, a power amplification module 50 and a voltage controlled oscillator module 60, when the wireless signal shielding device is used, the wireless signal shielding device can be respectively placed in different teachers, the external alarm device is placed on a teacher's desk, when an emergency occurs and needs to be operated, the external alarm device can be pressed down, and the state control of the shielding device can be completed according to a control instruction edited in advance.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (2)
1. A wireless signal shielding device supporting input control of an external alarm device is characterized by comprising a voltage input module (10), a voltage comparison module (20), a waveform shaping module (30), an MCU control module (40), a power amplification module (50) and a voltage-controlled oscillator module (60),
a voltage input module (10) for receiving an input voltage;
a voltage comparison module (20) for comparing the value of the input voltage to output an alarm signal;
the waveform shaping module (30) is used for performing waveform integration on the alarm signal so as to output the integrated alarm signal;
the MCU control module (40) is used for receiving and processing the integrated alarm signal so as to output a control instruction;
a voltage controlled oscillator module (60) for generating a frequency signal required by a wireless signal masker and outputting the frequency signal to the power amplification module (50);
the power amplification module (50) is used for receiving the control enabling signal and the control instruction transmitted by the MCU control module (40) and receiving the frequency signal of the voltage-controlled oscillator module (60) so as to turn on or turn off the radio frequency signal output end;
the wireless signal shielding device also comprises an external alarm, the external alarm is connected with the voltage input module (10), the external alarm is installed in a place convenient to use, and an output line of the external alarm is connected to the voltage input module (10) through a cable;
the voltage comparison module (20) comprises a voltage comparator, the model of the voltage comparator is an LM293D chip, and the LM293D chip is connected with the voltage input module (10);
the LM293D chip is used for detecting the input voltage, when the input voltage is lower than 1.2V, the LM293D chip detects that the input voltage is at a low level, and when the input voltage is higher than 3V, the LM293D chip detects that the input voltage is at a high level;
the waveform shaping module (30) comprises an inverter, the model of the inverter is 74HC14PW chip, the 74HC14PW chip is used for performing waveform integration on the alarm signal output by the LM293D chip, and the 74HC14PW chip is used for outputting the integrated alarm signal to the MCU control module (40);
when the external alarm is pressed down, the LM293D chip completes the detection of the input voltage, the detection level is low when the external input level is below 1.2V, the detection level is high when the external input level is above 3V, the LM293D chip completes the detection of the double voltages and outputs signals after the level quantity comparison is completed;
the MCU control module (40) comprises a control chip and a latch chip, wherein the model of the control chip is an IAP15W4K61S4 chip, the model of the latch chip is an SN74HC574PWR chip, a pin 3 and a pin 4 of the IAP15W4K61S4 chip are both used for receiving the integrated alarm signal and judging the integrated alarm signal, a pin 24 of the IAP15W4K61S4 chip is used for outputting the control instruction to the SN74HC574PWR chip, the MCU control module (40) sends out the corresponding control instruction according to the integrated alarm signal, and the control on the state of the shielding device is completed by editing the required control instruction in advance through a centralized management platform or the MCU control module (40);
the power amplification module (50) is connected with an antenna, the power amplification module (50) comprises a power amplification chip, the model of the power amplification chip is SKY77354 chip, a pin 4 of the SKY77354 chip is used for receiving a control signal output by the SN74HC574PWR chip so as to control the working state of the SKY77354 chip, the control signal transmitted by the SN74HC574PWR chip is controlled to be switched on and off by the SKY77354 chip, if an enable control end in the power amplification module (50) is switched off, the power amplification module (50) outputs no shielding signal, and if the enable control end in the power amplification module (50) is switched on, the power amplification module (50) outputs a shielding signal;
the control command is generated by the IAP15W4K61S4 chip;
the control signal is generated by the SN74HC574PWR chip;
the control enable signal is generated by the MCU control module (40).
2. A method of shielding a wireless signal masker supporting input control of an external alarm according to claim 1, wherein the method of shielding comprises:
receiving an input voltage;
comparing the values of the input voltages to output an alarm signal;
performing waveform integration on the alarm signal to output an integrated alarm signal;
receiving and processing the integrated alarm signal to output a control instruction;
generating a frequency signal required by the wireless signal shielding device;
according to the control enabling signal, the control instruction and the frequency signal, a radio frequency signal output end is opened or closed;
the control instruction is the control instruction which is edited in advance by a centralized management platform or an MCU control module (40);
the control enable signal is generated by the MCU control module (40).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125128.5A CN109286465B (en) | 2018-09-26 | 2018-09-26 | Wireless signal shielding device and shielding method supporting input control of external alarm device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811125128.5A CN109286465B (en) | 2018-09-26 | 2018-09-26 | Wireless signal shielding device and shielding method supporting input control of external alarm device |
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| CN109286465A CN109286465A (en) | 2019-01-29 |
| CN109286465B true CN109286465B (en) | 2021-04-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101621441B (en) * | 2009-07-29 | 2013-06-19 | 王方松 | Intelligent control wireless signal shielding terminal and shielding system |
| CN203243337U (en) * | 2013-03-22 | 2013-10-16 | 天津市英讯科技有限公司 | Cell phone signal jammer with management capability |
| CN204172929U (en) * | 2014-10-31 | 2015-02-25 | 东北大学秦皇岛分校 | Subway platform security alerting system |
| CN107734301A (en) * | 2017-10-23 | 2018-02-23 | 华蓥市双河第三小学 | A kind of safety monitoring system for classroom |
| CN207502976U (en) * | 2017-11-16 | 2018-06-15 | 西安方元明科技股份有限公司 | A kind of laser warning control system |
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