CN102862422A - Multifunctional blackboard - Google Patents
Multifunctional blackboard Download PDFInfo
- Publication number
- CN102862422A CN102862422A CN 201210409420 CN201210409420A CN102862422A CN 102862422 A CN102862422 A CN 102862422A CN 201210409420 CN201210409420 CN 201210409420 CN 201210409420 A CN201210409420 A CN 201210409420A CN 102862422 A CN102862422 A CN 102862422A
- Authority
- CN
- China
- Prior art keywords
- relay
- audio
- connects
- classroom
- detection signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Telephonic Communication Services (AREA)
- Electrically Operated Instructional Devices (AREA)
Abstract
The invention discloses a multifunctional blackboard. At present, most of devices produced by manufacturers only have one single function. A detecting device and a scrambling device are mostly independent device for each other and have single function, are free from any use in ordinary teaching and cannot be networked. The multifunctional blackboard is composed of a blackboard (1), wherein the edge of the blackboard is provided with an outer plastic frame (3) having a groove (4); a coil (5) is encircled in the groove, and the coil is connected with a control box (2). The product is used as a teaching appliance.
Description
Technical field:
The present invention relates to detection that audio frequency transmits and the multi-functional blackboard of scrambling and audio signal emission.
Background technology:
At present, in all kinds of large-scale examinations in order to prevent that the examinee from practising fraud mostly in the following ways: cheating signal shielding, cheating tool inspection, the compacting of cheating signal, cheating signal such as search at the method.The concrete relevant patent of taking precautions against has: cheat at one's exam with wireless invisible earpiece detector (patent No. is 200620146804.3), classroom (patent No. is 200720088891.6), the examination hall cellular phone signal shielding device, the navigation system of cheating monitoring function (patent No. is 200720128329.1), a kind of intermediate-freuqncy signal processing module of radio anti-cheating system (patent No. is 201120090985.3), ANTENNAUDIO emitter and ANTENNAUDIO receiving system (patent No. is 200520060669.6) etc.Above-mentioned patent and present producer's production equipment simple function mostly.Checkout equipment and scrambling equipment mostly are equipment independently separately, function singleness, and at ordinary times teaching is upper useless, can not networking, the each use all gets installment and debugging.
Summary of the invention:
The purpose of this invention is to provide a kind of can by network and separately control have detect that audio frequency transmits, the multi-functional blackboard of audio signal emission, audio signal scrambling.
Above-mentioned purpose realizes by following technical scheme:
A kind of multi-functional blackboard, its composition comprises: blackboard, described blackboard edge are equipped with the reeded plastics housing of tool, and coil encircling is in described groove, and described coil is connected with control box.
Described multi-functional blackboard, in the described control box microprocessor system is installed, described microprocessor system is connected respectively relay, detection signal transfer relay, detection signal treatment circuit, the connection of loudspeaker cut-in relay with input signal transfer relay, audio-frequency power amplifier, resonant capacitance, described detection signal transfer relay is connected with described detection signal treatment 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 multi-functional blackboard, described microprocessor system comprises microprocessor, power supply, described microprocessor is the connection status selector switch respectively, state shows the LED lamp, relay drive circuit, A/D converter, the scrambling audio signal source, network interface, described relay drive circuit respectively with described input signal transfer relay, described resonant capacitance connects relay, described detection signal transfer relay, described loudspeaker cut-in relay connects, described loudspeaker cut-in relay is connected with the classroom horn interface, described A/D converter is connected with described detection signal treatment 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 the classroom horn box, described network interface realization network connected to the network centralized Control, and described Network Interface Module has fixed ip address.
Beneficial effect:
1. the coil of installing in the plastics housing groove of the present invention is for detection of the emission of cheating audio frequency, received audio signal, automatic transmitting audio frequency scrambled signals after detecting the cheating audio frequency and transmitting, emission comes the audio program to wired broadcast system or classroom audio frequency teaching equipment when daily teaching, and the student listens to educational programme by the radio with audio frequency receiving function.Microprocessor system and interlock circuit are installed in the control box to be controlled above-mentioned reception or emission function.
The audio signal that the present invention is used in the cheating equipment emission in the classroom examination process detects, and the cheating audio signal that detects is carried out scrambling, also can cooperate the radio with audio frequency receiving function to carry out audition in teaching.Control box is used for the sending and receiving function conversion that control detects audio program or the audio frequency teaching equipment in the classroom of audio signal, transmitting audio frequency interfering signal or emission wired broadcast system.Fixed ip address is arranged, in order to by network it is carried out separately or centralized Control in the control box.
The present invention is with the use that combines of control box and blackboard, need not additionally to increase equipment, not only can detect the cheating signal automatically to the cheating signal scrambling, the more important thing is that also can be used as teaching equipment uses in teaching and school broadcasting, combining with the wired broadcasting in the classroom, cheating signal detection, to cheating signal scrambling and network makes the said equipment bring into play maximum effect.
The present invention is that collection detection, scrambling and daily teaching are used one, realizes a tractor serves several purposes, and cost is low, simple in structure, has given full play to the effect of network.
Description of drawings:
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is structural representations of plastics housing in the accompanying drawing 1.
Accompanying drawing 3 is circuit theory diagrams of the present invention.
The specific embodiment:
Embodiment 1:
A kind of multi-functional blackboard, its composition comprises: blackboard 1, described blackboard edge is equipped with the plastics housing 3 with groove 4, coil 5 is looped around in the described groove, described coil is connected with control box 2, and described coil transmits for detection of audio frequency or transmitting audio frequency interfering signal or emission come the audio program of Campus Broadcasting System.
Embodiment 2:
Above-mentioned multi-functional blackboard, microprocessor system 6 is installed in the described control box, described microprocessor system respectively with input signal transfer relay 7, audio-frequency power amplifier 8, resonant capacitance connects relay 11, detection signal transfer relay 12, detection signal treatment circuit 13, loudspeaker cut-in relay 14 connects, described detection signal transfer relay is connected with described detection signal treatment circuit, described audio-frequency power amplifier respectively with wired broadcasting input interface 9, classroom audio input interface 10 connects, and described resonant capacitance connects relay and is connected with resonant capacitance 18.
Embodiment 3:
Above-mentioned multi-functional blackboard, described microprocessor system comprises microprocessor 19, power supply 20, described microprocessor is connection status selector switch 16 respectively, state shows LED lamp 17, relay drive circuit 21, A/D converter 22, scrambling audio signal source 23, network interface 24, described relay drive circuit respectively with described input signal transfer relay 7, described resonant capacitance connects relay 11, described detection signal transfer 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 treatment circuit, described scrambling audio signal source and described audio-frequency power amplifier, described wired broadcasting input interface, described classroom audio input interface connects, and described microprocessor is used for detecting audio signal or transmitting audio frequency interfering signal or emission from the control switching circuit of the audio frequency of 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 the classroom horn box, described network interface realization network connected to the network centralized Control, and described Network Interface Module has fixed ip address.
Embodiment 5:
Above-mentioned multi-functional blackboard, audio frequency transmits and detects and the automatic course of work of scrambled state: enter the L1 Chang Liang in the at this moment demonstration of the state on the control box panel LED lamp by K1 button in the selector switch on network centralized Control (preferentially) or the control box panel; Detection signal transfer relay adhesive closing coil.Described coil-induced to after testing signal processing circuit amplification of signal, bandpass filtering (70-3000Hz), rectification be converted into the direct current fluctuation signal.The A/D change-over circuit that above-mentioned signal enters microprocessor system inside converts data signal to, and this signal determines whether setting signal scope (cheating signal strength range) through little processing.When described microprocessor judges was the cheating signal, state showed that the L1 in the LED lamp flashes, and system enters automatic scrambled state.The adhesive of above-mentioned microprocessor system control inputs signal transfer relay; Resonant capacitance connects the relay adhesive and connects resonant capacitance; 70-3000Hz scope pulse signal is exported in the scrambled signals source under the instruction of described microprocessor.This signal exports the blackboard coil to after audio-frequency power amplifier amplifies, described electric capacity and coil are optimum resonant state, make scrambled signals be output as maximum.Above-mentioned coil is launched this signal.If microprocessor system switches to detected state cheating signal with emission state and also exists behind certain interval of time, then keep scrambled state, otherwise continue cheating signal detection state.
Embodiment 6:
Above-mentioned multi-functional blackboard, the course of work during the radio listening state: enter this function by the K2 button in network centralized Control (preferentially) or the selector switch, at this moment, state shows that the L2 in the LED lamp is bright; The adhesive of input signal transfer relay; The classroom audio frequency apparatus signal of wired broadcasting input interface input cable broadcasting signal or audio input interface input exports coil to after audio-frequency power amplifier amplifies, above-mentioned coil is launched this signal, and the student can receive by the radio with audio frequency receiving function.
Embodiment 7:
Above-mentioned multi-functional blackboard, the course of work during the loudspeaker audition state of classroom: enter this function by network centralized Control (preferentially) or by the K3 button in the selector switch, at this moment state shows that the L3 in the LED lamp is bright; The adhesive of input signal transfer relay, the adhesive of loudspeaker cut-in relay is amplified and is entered this function network of loudspeaker that is installed in the classroom by the loudspeaker cut-in relay and realize the single classroom of selecting is broadcasted but cable broadcasting signal enters audio-frequency power amplifier through wired broadcasting input interface or classroom audio frequency apparatus signal through the classroom audio input interface.
Claims (4)
1. multi-functional blackboard, its composition comprises: blackboard is characterized in that: described blackboard edge is equipped with the reeded plastics housing of tool, and coil encircling is in described groove, and described coil is connected with control box.
2. multi-functional blackboard according to claim 1, it is characterized in that: in the described control box microprocessor system is installed, described microprocessor system respectively with the input signal transfer relay, audio-frequency power amplifier, resonant capacitance connects relay, the detection signal transfer relay, the detection signal treatment circuit, the loudspeaker cut-in relay connects, described detection signal transfer relay is connected with described detection signal treatment circuit, described audio-frequency power amplifier respectively with the wired broadcasting input interface, the classroom audio input interface connects, and described resonant capacitance connects relay and is connected with resonant capacitance.
3. multi-functional blackboard according to claim 1 and 2, it is characterized in that: described microprocessor system comprises microprocessor, power supply, described microprocessor is the connection status selector switch respectively, state shows the LED lamp, relay drive circuit, A/D converter, the scrambling audio signal source, network interface, described relay drive circuit respectively with described input signal transfer relay, described resonant capacitance connects relay, described detection signal transfer relay, described loudspeaker cut-in relay connects, described loudspeaker cut-in relay is connected with the classroom horn interface, described A/D converter is connected with described detection signal treatment circuit, described scrambling audio signal source and described audio-frequency power amplifier, described wired broadcasting input interface, described classroom audio input interface connects.
4. multi-functional blackboard according to claim 1 and 2, it 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 the classroom horn box, described network interface realization network connected to the network centralized Control, and described 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 true CN102862422A (en) | 2013-01-09 |
| CN102862422B CN102862422B (en) | 2016-06-08 |
Family
ID=47441663
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) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960001649B1 (en) * | 1987-09-14 | 1996-02-03 | 가부시기가이샤 와꼬무 | Electronic blackboard system, the marker and the 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
Also Published As
| Publication number | Publication date |
|---|---|
| CN102862422B (en) | 2016-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205193530U (en) | Multi -functional environmental monitoring and electrical apparatus controlgear | |
| CN207897129U (en) | Magnetic suspension intelligent sound box | |
| CN206038921U (en) | Audio frequency and video life detector | |
| CN102862422A (en) | Multifunctional blackboard | |
| CN202904870U (en) | 2.4-GHz voice remote controller for cloud television | |
| CN201947351U (en) | Simultaneous interpreting system for radio conference | |
| WO2017032046A1 (en) | Real-time monitoring device for safe | |
| CN109637234A (en) | A kind of computer information technology instructional device | |
| CN105487397A (en) | Integrated smart home | |
| CN102904657B (en) | Frequency modulation broadcast listening monitoring receiver | |
| CN206135895U (en) | Intercom terminal's switching device , intercom terminal and intercom system | |
| CN203689659U (en) | Multichannel data acquisition and voice alarm system based on bluetooth | |
| CN209017288U (en) | A kind of frequency modulation pickup monitoring system and frequency modulation Teaching Listening Comprehension system | |
| CN103472500B (en) | Multifunctional examination room anti-cheat detecting device and anti-cheat detecting method. | |
| CN203206254U (en) | Stationary examination room electromagnetic signal monitor | |
| CN206422893U (en) | Detachable combined box | |
| CN202889494U (en) | An audio-video wireless frequency-modulation receiver with double antennas | |
| CN107835474A (en) | A kind of intelligent sound for smart home | |
| CN204362062U (en) | Multi-functional RDS meets an urgent need digital power amplifier enlarger | |
| CN202145640U (en) | High frequency wireless transmission / reception annunciator for reception signals | |
| CN203537376U (en) | All-in-one wireless explaining controller | |
| CN216357275U (en) | Audio input/output system and audio equipment | |
| CN203313332U (en) | Solar monitoring system for radio and television | |
| CN203563123U (en) | Easily-used device for data communication between devices | |
| CN206775745U (en) | Wireless amplification equipment connects system with the preferential low coverage of multiple wireless microphones intelligence |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20191024 |