CN102862422B - Multi-functional blackboard - Google Patents
Multi-functional blackboard Download PDFInfo
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- CN102862422B CN102862422B CN201210409420.6A CN201210409420A CN102862422B CN 102862422 B CN102862422 B CN 102862422B CN 201210409420 A CN201210409420 A CN 201210409420A CN 102862422 B CN102862422 B CN 102862422B
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Abstract
<b>multi-functional blackboard.</b><b>current producer has produced equipment mostly simple function. Detection equipment and scrambling device are mostly each independent equipment, function singleness, and teaching at ordinary times is upper useless, it is impossible to networking. Present invention composition includes: blackboard (</b><b>1</b><b>), described blackboard edge be provided with have groove (</b><b>4</b><b>) plastics housing (</b><b>3</b><b>), coil (</b><b>5</b><b>) be looped around in described groove, described coil with control box (</b><b>2</b><b>) connect.</b><b>this product is used as teaching aid.</b>
Description
Technical field:
The present invention relates to the detection of audio emission signal and scrambling and the multi-functional blackboard of audio signal transmitting.
Background technology:
At present, in order to prevent examinee from practising fraud mostly in the following ways in all kinds of large-scale examinations: methods such as cheating signal shielding, cheating tool inspection, cheating signal compacting, cheating signal lookups. particularly relevant strick precaution patent has: cheat at one's exam with wireless invisible earpiece detector (patent No. is 200620146804.3), classroom (patent No. is 200720088891.6), examination hall cellular phone signal shielding device, the alignment system (patent No. is 200720128329.1) of cheating monitoring function, a kind of IF signal processing module (patent No. is 201120090985.3) of radio anti-cheating system, ANTENNAUDIO discharger and wireless audio reception device (patent No. is 200520060669.6) etc. above-mentioned patent and current producer have produced equipment mostly simple function. detection equipment and scrambling device are mostly each independent equipment, function singleness, and teaching at ordinary times is upper useless, it is impossible to networking, each use all must be installed and debug.
Summary of the invention:
It is an object of the invention to provide a kind of multi-functional blackboard with detection audio emission signal, audio signal transmitting, audio signal scrambling passing through network and individually control.
Above-mentioned purpose is realized by following technical scheme:
A kind of multi-functional blackboard, its composition includes: blackboard, and described blackboard edge is provided with the reeded plastics housing of tool, and coil encircling is in described groove, and described coil is connected with controlling box.
Described multi-functional blackboard, in described control box, microprocessor system is installed, described microprocessor system switches relay with input signal respectively, audio-frequency power amplifier, resonant capacitance connects relay, detection signal switching relay, detection signal processing circuit, loudspeaker cut-in relay connects, described detection signal switching relay is connected with described detection signal processing circuit, described audio-frequency power amplifier respectively with wired broadcasting input interface, classroom audio input interface connects, described resonant capacitance connects relay and is connected with resonant capacitance.
Described multi-functional blackboard, described microprocessor system includes microprocessor, power supply, described microprocessor connection status respectively selects switch, state display LED, relay drive circuit, A/D converter, scrambling audio signal source, network interface, described relay drive circuit switches relay with described input signal respectively, described resonant capacitance connects relay, described detection signal switching relay, described loudspeaker cut-in relay connects, described loudspeaker cut-in relay is connected with classroom horn interface, described A/D converter is connected with described detection signal processing circuit, described scrambling audio signal source and described audio-frequency power amplifier, described wired broadcasting input interface, described classroom audio input interface connects.
Described multi-functional blackboard, described wired broadcasting input interface connects wired program circuit, and described classroom audio input interface connects computer audio input or other audio frequency apparatuses; Described classroom horn interface connects classroom horn box, and the described network interface network centralized Control that realizes connected to the network, described Network Interface Module has fixed ip address.
Beneficial effect:
1. the coil installed in the plastics housing groove of the present invention is used for detecting cheating audio emission, receiving audio signal, automatically audio scrambling signal is launched after cheating audio emission signal being detected, launch the audio program to wired broadcast system or classroom audio frequency teaching equipment when daily teaching, student listens to educational programme by the radio with audio frequency receive capabilities. Control, in box, microprocessor system and interlock circuit are installed above-mentioned reception or emission function are controlled.
The present invention can be used for the audio signal detection that the cheating equipment in the examination process of classroom is launched, and the cheating audio signal of detection is carried out scrambling, it is possible to coordinates the radio with audio frequency receive capabilities to carry out audition in teaching. Control box is for controlling to detect the sending and receiving power and energy of the audio frequency teaching equipment in the audio program of audio signal, transmitting audio disturbances signal or transmitting wired broadcast system or classroom. Control there is fixed ip address in box, it is individually or collectively controlled will pass through network.
Control box and blackboard are used in conjunction with by the present invention, without additionally increasing equipment, not only can detect cheating signal automatically to cheating signal scrambling, the more important thing is and be alternatively arranged as teaching equipment application in teaching and school broadcasting, by the wired broadcasting in classroom, cheating signal detection, cheating signal scrambling and network are combined makes the said equipment play maximum effect.
The present invention is collection detection, scrambling and daily teaching application one, it is achieved a tractor serves several purposes, cost is low, simple in construction, has given full play to the effect of network.
Accompanying drawing illustrates:
Accompanying drawing 1 is the structural representation of the present invention.
Accompanying drawing 2 is the structural representation of plastics housing in accompanying drawing 1.
Accompanying drawing 3 is the circuit theory diagrams of the present invention.
Detailed description of the invention:
Embodiment 1:
A kind of multi-functional blackboard, its composition includes: blackboard 1, described blackboard edge is provided with the plastics housing 3 with groove 4, coil 5 is looped around in described groove, described coil is connected with controlling box 2, and described coil is for detecting audio emission signal or launching audio disturbances signal or launch the audio program of Campus Broadcasting System.
Embodiment 2:
Above-mentioned multi-functional blackboard, in described control box, microprocessor system 6 is installed, described microprocessor system switches relay 7 with input signal respectively, audio-frequency power amplifier 8, resonant capacitance connects relay 11, detection signal switching relay 12, detection signal processing circuit 13, loudspeaker cut-in relay 14 connects, described detection signal switching relay is connected with described detection signal processing circuit, described audio-frequency power amplifier respectively with wired broadcasting input interface 9, classroom audio input interface 10 connects, described resonant capacitance connects relay and is connected with resonant capacitance 18.
Embodiment 3:
Above-mentioned multi-functional blackboard, described microprocessor system includes microprocessor 19, power supply 20, described microprocessor connection status respectively selects switch 16, state display LED 17, relay drive circuit 21, A/D converter 22, scrambling audio signal source 23, network interface 24, described relay drive circuit switches relay 7 with described input signal respectively, described resonant capacitance connects relay 11, described detection signal switching relay, described loudspeaker cut-in relay connects, described loudspeaker cut-in relay is connected with classroom horn interface 15, described A/D converter is connected with described detection signal processing circuit, described scrambling audio signal source and described audio-frequency power amplifier, described wired broadcasting input interface, described classroom audio input interface connects, described microprocessor is for detecting audio signal or launching audio disturbances signal or launch the control switching circuit from the audio frequency in voice band line.
Embodiment 4:
Above-mentioned multi-functional blackboard, described wired broadcasting input interface connects wired program circuit, and described classroom audio input interface connects computer audio input or other audio frequency apparatuses; Described classroom horn interface connects classroom horn box, and the described network interface network centralized Control that realizes connected to the network, described Network Interface Module has fixed ip address.
Embodiment 5:
Above-mentioned multi-functional blackboard, the work process of audio emission signal detection and automatic scrambled state: entered by K1 button in the selection switch in network centralized Control (preferentially) or control box panel, at this moment controls the L1 Chang Liang in the state display LED on box panel; Detection signal switching relay adhesive closing coil. Described coil-induced to the amplification of signal signal processing circuit after testing, bandpass filtering (70-3000Hz), rectification be converted into direct current fluctuation signal. The A/D change-over circuit that above-mentioned signal enters within microprocessor system converts digital signal to, and this signal determines whether setting signal scope (cheating signal strength range) through micro-process. When described microprocessor judges is for cheating signal, the L1 in state display LED flashes, and system enters automatic scrambled state. Above-mentioned microprocessor system controls input signal switching relay adhesive; Resonant capacitance connects relay adhesive and connects resonant capacitance; Scrambled signals source exports 70-3000Hz domain impulse signal under the instruction of described microprocessor. This signal exports to blackboard coil after audio-frequency power amplifier amplifies, and described electric capacity and coil are optimum resonant state, make scrambled signals be output as maximum. This signal is launched by above-mentioned coil. If emission state is switched to detection state cheating signal there is also by microprocessor system after certain interval of time, then keep scrambled state, otherwise continue cheating signal detection state.
Embodiment 6:
Above-mentioned multi-functional blackboard, work process during radio listening state: enter this function by the K2 button in network centralized Control (preferentially) or selection switch, at this moment, the L2 in state display LED is bright; Input signal switching relay adhesive; The classroom audio frequency apparatus signal of wired broadcasting input interface input cable broadcasting signal or audio input interface input exports to coil after audio-frequency power amplifier amplifies, this signal is launched by above-mentioned coil, and student can pass through to have the radio of audio frequency receive capabilities and receive.
Embodiment 7:
Above-mentioned multi-functional blackboard, the work process during loudspeaker audition state of classroom: by network centralized Control (preferentially) or by selecting the K3 button in switch to enter this function, the L3 at this moment state display LED is bright; Input signal switching relay adhesive, loudspeaker cut-in relay adhesive, cable broadcasting signal enters, through loudspeaker cut-in relay, this function of loudspeaker being arranged on classroom through wired broadcasting input interface or classroom audio frequency apparatus signal after audio input interface entrance audio-frequency power amplifier in classroom amplifies and can real-time performance be broadcasted by the single classroom selected.
Claims (2)
1. a multi-functional blackboard, its composition includes: blackboard, it is characterized in that: described blackboard edge is provided with the reeded plastics housing of tool, and coil encircling is in described groove, and described coil is connected with controlling box;
In described control box, microprocessor system is installed, described microprocessor system is connected relay with input signal switching relay, audio-frequency power amplifier, resonant capacitance respectively, detection signal switches relay, detection signal processing circuit, loudspeaker cut-in relay connect, described detection signal switching relay is connected with described detection signal processing circuit, described audio-frequency power amplifier is connected with wired broadcasting input interface, classroom audio input interface respectively, and described resonant capacitance connects relay and is connected with resonant capacitance;
Described microprocessor system includes microprocessor, power supply, described microprocessor connection status respectively selects switch, state display LED, relay drive circuit, A/D converter, scrambling audio signal source, network interface, described relay drive circuit switches relay with described input signal respectively, described resonant capacitance connects relay, described detection signal switching relay, described loudspeaker cut-in relay connects, described loudspeaker cut-in relay is connected with classroom horn interface, described A/D converter is connected with described detection signal processing circuit, described scrambling audio signal source and described audio-frequency power amplifier, described wired broadcasting input interface, described classroom audio input interface connects.
2. multi-functional blackboard according to claim 1, is characterized in that: described wired broadcasting input interface connects wired program circuit, and described classroom audio input interface connects computer audio input or other audio frequency apparatuses; Described classroom horn interface connects classroom horn box, and described network interface is connected to the network realizes network centralized Control, and Network Interface Module has fixed ip address.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210409420.6A CN102862422B (en) | 2012-10-24 | 2012-10-24 | Multi-functional blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210409420.6A CN102862422B (en) | 2012-10-24 | 2012-10-24 | Multi-functional blackboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102862422A CN102862422A (en) | 2013-01-09 |
| CN102862422B true CN102862422B (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210409420.6A Expired - Fee Related CN102862422B (en) | 2012-10-24 | 2012-10-24 | Multi-functional blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102862422B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035900A (en) * | 1987-09-14 | 1989-09-27 | 株式会社瓦科姆 | Electronic blackboard device and Write thereof and blackboard eraser |
| CN2109312U (en) * | 1991-09-21 | 1992-07-08 | 康建军 | Screen type board for teaching aid |
| CN1631684A (en) * | 2004-12-30 | 2005-06-29 | 郑海波 | Multifunctional frame type fluorescent writing board |
| CN2833753Y (en) * | 2005-09-09 | 2006-11-01 | 陈琪 | Multimedia teaching apparatus |
-
2012
- 2012-10-24 CN CN201210409420.6A patent/CN102862422B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035900A (en) * | 1987-09-14 | 1989-09-27 | 株式会社瓦科姆 | Electronic blackboard device and Write thereof and blackboard eraser |
| CN2109312U (en) * | 1991-09-21 | 1992-07-08 | 康建军 | Screen type board for teaching aid |
| CN1631684A (en) * | 2004-12-30 | 2005-06-29 | 郑海波 | Multifunctional frame type fluorescent writing board |
| CN2833753Y (en) * | 2005-09-09 | 2006-11-01 | 陈琪 | Multimedia teaching apparatus |
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| Publication number | Publication date |
|---|---|
| CN102862422A (en) | 2013-01-09 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20191024 |
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| CF01 | Termination of patent right due to non-payment of annual fee |