CN104935880A - Examination room intelligent management system - Google Patents

Examination room intelligent management system Download PDF

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Publication number
CN104935880A
CN104935880A CN201510282074.3A CN201510282074A CN104935880A CN 104935880 A CN104935880 A CN 104935880A CN 201510282074 A CN201510282074 A CN 201510282074A CN 104935880 A CN104935880 A CN 104935880A
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examination hall
video acquisition
terminal
management system
module
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CN201510282074.3A
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CN104935880B (en
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殷凡
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Suzhou Vocational University
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Suzhou Vocational University
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Abstract

The invention discloses an examination room intelligent management system. The examination room intelligent management system comprises a remote monitoring control center, a plurality of floor command control sub-centers, a plurality of video acquisition general terminals, and a plurality of examination room video acquisition sub-terminals, the remote monitoring control center is connected with the plurality of floor command control sub-centers via wireless network communication, the floor command control sub-centers are connected with the video acquisition general terminals in a corresponding manner via a wired network, the video acquisition general terminals are connected with the examination room video acquisition sub-terminals in a communication manner via a ZigBee wireless network, and each examination room video acquisition sub-terminal comprises a time management module, an examination room number statistics module, an examination room light control module, a shielding module, and a power supply conversion module. By the above method, according to the examination room intelligent management system, intelligent monitoring and management of examination room information can be realized, the unity of information and time of various examination rooms is guaranteed, the labor intensity and the error probability for supervising personnel are reduced, and the examinations for students are fairer.

Description

A kind of examination hall intelligent management system
Technical field
The present invention relates to examination management system field, particularly relate to a kind of examination hall intelligent management system.
Background technology
The feature that Video Supervision Technique is directly perceived with it, convenient, the information content is abundant, plays positive effect in monitoring of always taking an examination.Current examination examination hall Design of Monitoring and Control System is simple, and the video that generally can only realize examination hall information is simply monitored and mobile phone shielding, and picture control, time management, demographics and examination hall, examination hall illumination brightness case can not be realized to carry out the integrated of intelligent management.These functions generally can only rely on invigilator personnel to carry out manual operation.Such as, need manually to add up everyone personal information in examination hall and number, invigilator's personnel labor intensity is large, is easy to occur that examinee is utilizing teacher in the number of checking and the gap controlled examination hall light, causes and plagiarizes or upset examination hall order.And supervisor is to the monitoring of time and judgement, and often easy time of occurrence error, for the examinee in each examination hall, very unfair.Current some wireless monitor modes adopting GPRS or ZigBee that occurred; Although but pure GPRS wireless monitor can realize remote communication, can communication cost is high, be also subject to the restriction of some occasions; And although the wireless monitor mode cost of pure ZigBee effectively reduces, can be subject to certain distance limit.Therefore, how to provide one both convenient, cost is low, can realize remote remote monitoring again, and video information transmission accurately, be not easy to break down or transmission of video distortion, be people's technical issues that need to address always.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of examination hall intelligent management system, Intellectualized monitoring and the management of examination hall information can be realized, ensure that each examination hall information and the uniformity of time, the labour intensity reducing invigilator personnel and the probability gone wrong, make examinee take an examination more fair.And it adopts the mode of GPRS or cdma wireless network integration, can not only communications cost be effectively reduced, remote monitoring remote video can also be realized, and this system effectively raises accuracy and the reliability of transmission of video.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of examination hall intelligent management system, comprising: remote monitoring control centre, multiple floor command & control branch center, the total terminal of multiple video acquisition and multiple examination halls video acquisition point terminal; Described remote monitoring control centre adopts wireless network communication to connect multiple floor command & control branch center; Described floor command & control branch center and the total terminal of described video acquisition are connected one to one by cable network; Adopt ZigBee wireless network to carry out communication between the total terminal of described video acquisition with examination hall video acquisition point terminal to be connected; A described examination hall video acquisition point terminal comprises time management module, examination hall demographics module, examination hall lighting control module, shroud module and power transfer module.
Preferably, described time management module comprises time timer, buzzer siren, timer and voice prompting device; Time timer described in described remote monitoring control centre connection control; Described time timer is connected with described buzzer siren, timer, voice prompting device respectively; Described voice prompting device is connected with described timer.
Preferably, described examination hall demographics module comprises infrared survey people counting unit, number display unit and single-chip microcomputer; Described infrared survey people counting unit comprises infrared transmitting circuit, infrared receiving circuit, TSAL6200 infrared-emitting diode and TSOP1838 infrared remote receiver; Described infrared transmitting circuit produces pulse signal by NE555 chip as oscillator, and drive described TSAL6200 infrared-emitting diode by triode, described infrared receiving circuit, by TSOP1838 infrared remote receiver and modulate circuit, inputs described interface microcontroller through not gate 74LS04; Described number display unit comprises two 74LS74 decoders, multiple current-limiting resistance and two common anode pole charactrons, and described 74LS74 decoder connects current-limiting resistance and corresponding common anode pole charactron.
Preferably, described examination hall lighting control module comprises examination hall photosensitive unit and fluorescent lamp driver element; Described examination hall photosensitive unit comprises photo resistance and light comparator, and photo resistance is connected with light comparator, and light comparator is connected with single-chip microcomputer; Described fluorescent lamp driver element comprises triode and drives electromagnetic relay, current-limiting resistance and fluorescent lamp, and triode drives electromagnetic relay to connect described single-chip microcomputer by current-limiting resistance, and described triode drives electromagnetic relay to be connected with fluorescent lamp.
Preferably, described shroud module comprises relay and shielding instrument, and described relay is connected with shielding instrument.
Preferably, described power transfer module comprises 15V transformer, full-wave rectification bridge, 12V exports three terminal regulator and 5V exports three terminal regulator, 15V transformer is connected with full-wave rectification bridge, full-wave rectification bridge connects described 12V and exports three terminal regulator and 5V output three terminal regulator, and described 5V exports three terminal regulator and is connected with described single-chip microcomputer.
Preferably, described remote monitoring control centre comprises communication control server, database purchase server, Streaming Media monitoring server, Database Administration Server and cloud computing server; Described cloud computing server connects described database purchase server, and database purchase server is connected according to library management server with number is described.
Preferably, described ZigBee wireless network is the tree network based on ZigBee, and the tree network based on ZigBee comprises coordinator node, multiple router node and multiple terminal node; Described coordinator node is set up a ZigBee tree network and is safeguarded this network information; Described router node Maintenance Point routing table, and the data in transmission network; Described terminal node and described examination hall video acquisition point terminal or the total terminal of video acquisition carry out transport communication with the communication mode of USB; Described coordinator node, router node and terminal node are wireless ZigBee radio-frequency (RF) transceiver, and wireless ZigBee radio-frequency (RF) transceiver comprises power module, microcontroller, ZigBee rf chip and radio-frequency (RF) power amplification circuit; Described power module adopts balun to carry out voltage transitions.
Preferably, described wireless network communication is GPRS or cdma wireless network.
The invention has the beneficial effects as follows: the present invention can realize Intellectualized monitoring and the management of examination hall information, ensure that each examination hall information and the uniformity of time, the labour intensity reducing invigilator personnel and the probability gone wrong, make examinee take an examination more fair.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of examination hall of the present invention intelligent management system;
Fig. 2 is the structural representation of the examination hall video acquisition point terminal of a kind of examination hall of the present invention intelligent management system.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1 and Fig. 2, the embodiment of the present invention comprises:
A kind of examination hall intelligent management system, comprising: remote monitoring control centre, multiple floor command & control branch center, the total terminal of multiple video acquisition and multiple examination halls video acquisition point terminal; Described remote monitoring control centre adopts wireless network communication to connect multiple floor command & control branch center; Described floor command & control branch center is connected by cable network with the total terminal one_to_one corresponding of described video acquisition; Adopt ZigBee wireless network to carry out communication between the total terminal of described video acquisition with corresponding examination hall video acquisition point terminal to be connected; A described examination hall video acquisition point terminal comprises time management module, examination hall demographics module, examination hall lighting control module, shroud module and power transfer module.Described ZigBee wireless network is the tree network based on ZigBee, and the tree network based on ZigBee comprises coordinator node, multiple router node and multiple terminal node; Described coordinator node is set up a ZigBee tree network and is safeguarded this network information; Described router node Maintenance Point routing table, and the data in transmission network; Described terminal node and described examination hall video acquisition point terminal or the total terminal of video acquisition carry out transport communication with the communication mode of USB; Gathered information sends and is transferred to terminal node by examination hall video acquisition point terminal, coordinator node is sent to again through router node, collected information transmission is given the total terminal of described video acquisition, to send total for video acquisition terminal to its corresponding floor command & control branch center in the mode of cable network by described coordinator node; Described coordinator node, router node and terminal node are wireless ZigBee radio-frequency (RF) transceiver, and wireless ZigBee radio-frequency (RF) transceiver comprises power module, microcontroller, ZigBee rf chip and radio-frequency (RF) power amplification circuit; Described power module adopts balun to carry out voltage transitions.Each video acquisition point terminal includes camera, video frequency collection card, image splitter, encoder, forwarding server; Send described forwarding server to after the encoded process of the information that camera collects by described encoder, the information transmission after coded treatment is given described terminal node by described forwarding server.Described wireless network communication is GPRS or cdma wireless network.Described remote monitoring control centre comprises communication control server, database purchase server, Streaming Media monitoring server, Database Administration Server and cloud computing server; Described cloud computing server connects described database purchase server, and database purchase server is connected according to library management server with number is described; The information that each floor command & control branch center sends is carried out taxonomic revision by described remote monitoring control centre, after carrying out operational analysis process by cloud computing server, again the monitor message of received information is stored in database purchase server, and database purchase server is connected with Database Administration Server, carry out data management and maintenance by described Database Administration Server.Described time management module comprises time timer, buzzer siren, timer and voice prompting device; Time timer described in described remote monitoring control centre connection control, time timer connects described buzzer siren, timer, voice prompting device; Described voice prompting device is connected with described timer, and described voice prompting device sends a prompt tone every half an hour.Described examination hall demographics module comprises infrared survey people counting unit, number display unit and single-chip microcomputer; Described infrared survey people counting unit comprises infrared transmitting circuit, infrared receiving circuit, TSAL6200 infrared-emitting diode and TSOP1838 infrared remote receiver, described infrared transmitting circuit produces pulse signal by NE555 chip as oscillator, and drive described TSAL6200 infrared-emitting diode by triode, described infrared receiving circuit, by TSOP1838 infrared remote receiver and corresponding modulate circuit, inputs described interface microcontroller through not gate 74LS04; Described number display unit comprises two 74LS74 decoders, multiple current-limiting resistance and two common anode pole charactrons, and 74LS74 decoder connects current-limiting resistance and corresponding common anode pole charactron.Described examination hall lighting control module comprises examination hall photosensitive unit and fluorescent lamp driver element; Described examination hall photosensitive unit comprises photo resistance and light comparator, and photo resistance is connected with light comparator, and light comparator is connected with single-chip microcomputer; Described fluorescent lamp driver element comprises triode and drives electromagnetic relay, current-limiting resistance and fluorescent lamp, and triode drives electromagnetic relay to connect described single-chip microcomputer by current-limiting resistance, and described triode drives electromagnetic relay to be connected with fluorescent lamp.Described shroud module comprises relay and shielding instrument, and relay is connected with shielding instrument.Described power transfer module comprises 15V transformer, full-wave rectification bridge, 12V exports three terminal regulator and 5V exports three terminal regulator; The input of described 15V transformer is connected with the 220V alternating current in examination hall, the output of 15V transformer is connected with full-wave rectification bridge, full-wave rectification bridge connects described 12V and exports three terminal regulator and 5V output three terminal regulator, and described 5V exports three terminal regulator and is connected with described single-chip microcomputer.
Before examination starts, open the relay of shroud module, control shielding instrument and open, the communication line in shielding instrument shielding examination hall; Remote monitoring control centre arranges the test time, and send to time timer, after time arrives, the buzzer siren being arranged on each examination hall sends the alarm sound that the test time arrives, timer starts timing simultaneously, timer, from timing, often spends half an hour, controls the voice that voice prompting device sends examination remaining time; Demographics module measures the number in examination hall by infrared survey people counting unit, and shown by the number display unit be arranged in examination hall, and concrete examination hall information and number being sent to corresponding floor command & control branch center, the packing of described floor command & control branch center sends the examination hall number information in floor to described remote monitoring control centre; Lighting control module by the bright intensity in photosensitive unit Real-time Collection examination hall, examination hall, and sends the information of collection to single-chip microcomputer, by Single-chip Controlling fluorescent lamp driver element, and then controls the intensity of fluorescent lamp; A video acquisition point terminal is that camera and video frequency collection card monitor collection video information in real time, then, gathered video information is carried out picture segmentation by image splitter, picture after segmentation is encoded through encoder, and adopt packing mechanism, channel coding scheme and error recovery mechanisms to process video information, to alleviate the impact of error of transmission on decoding, finally, by the video information transmission after process to forwarding server, forwarding server by the video information transmission handled well to the terminal node of ZiBee wireless network; The terminal node of ZiBee wireless network is sent to described coordinator node through router node again, collected information transmission is given the total terminal of described video acquisition, to send total for described video acquisition terminal to its corresponding floor command & control branch center in the mode of cable network by described coordinator node; Video information is transferred to remote monitoring control centre in the mode of GPRS or cdma wireless network by floor command & control branch center; The video information that each floor command & control branch center sends is carried out taxonomic revision by remote monitoring control centre, after carrying out operational analysis process by cloud computing server, monitoring content is stored in database purchase server, and Database Administration Server carries out data management and maintenance to database purchase server in real time, the video information received shows on a display screen by remote monitoring control centre.
The present invention can realize Intellectualized monitoring and the management of examination hall information, ensure that each examination hall information and the uniformity of time, and the labour intensity reducing invigilator personnel and the probability gone wrong, make examinee take an examination more fair.And it adopts the mode of GPRS or cdma wireless network integration, can not only communications cost be effectively reduced, remote monitoring remote video can also be realized, and this system effectively raises accuracy and the reliability of transmission of video.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (9)

1. an examination hall intelligent management system, is characterized in that, comprising: remote monitoring control centre, multiple floor command & control branch center, the total terminal of multiple video acquisition and multiple examination halls video acquisition point terminal; Described remote monitoring control centre adopts wireless network communication to connect multiple floor command & control branch center; Described floor command & control branch center and the total terminal of described video acquisition are connected one to one by cable network; Adopt ZigBee wireless network to carry out communication between the total terminal of described video acquisition with examination hall video acquisition point terminal to be connected; A described examination hall video acquisition point terminal comprises time management module, examination hall demographics module, examination hall lighting control module, shroud module and power transfer module.
2. a kind of examination hall according to claim 1 intelligent management system, is characterized in that: described time management module comprises time timer, buzzer siren, timer and voice prompting device; Time timer described in described remote monitoring control centre connection control; Described time timer is connected with described buzzer siren, timer, voice prompting device respectively; Described voice prompting device is connected with described timer.
3. a kind of examination hall according to claim 2 intelligent management system, is characterized in that: described examination hall demographics module comprises infrared survey people counting unit, number display unit and single-chip microcomputer; Described infrared survey people counting unit comprises infrared transmitting circuit, infrared receiving circuit, TSAL6200 infrared-emitting diode and TSOP1838 infrared remote receiver; Described infrared transmitting circuit produces pulse signal by NE555 chip as oscillator, and drive described TSAL6200 infrared-emitting diode by triode, described infrared receiving circuit, by TSOP1838 infrared remote receiver and modulate circuit, inputs described interface microcontroller through not gate 74LS04; Described number display unit comprises two 74LS74 decoders, multiple current-limiting resistance and two common anode pole charactrons, and described 74LS74 decoder connects current-limiting resistance and corresponding common anode pole charactron.
4. a kind of examination hall according to claim 3 intelligent management system, is characterized in that: described examination hall lighting control module comprises examination hall photosensitive unit and fluorescent lamp driver element; Described examination hall photosensitive unit comprises photo resistance and light comparator, and photo resistance is connected with light comparator, and light comparator is connected with single-chip microcomputer; Described fluorescent lamp driver element comprises triode and drives electromagnetic relay, current-limiting resistance and fluorescent lamp, and triode drives electromagnetic relay to connect described single-chip microcomputer by current-limiting resistance, and described triode drives electromagnetic relay to be connected with fluorescent lamp.
5. a kind of examination hall according to claim 4 intelligent management system, is characterized in that: described shroud module comprises relay and shielding instrument, and described relay is connected with shielding instrument.
6. a kind of examination hall according to claim 5 intelligent management system, it is characterized in that: described power transfer module comprises 15V transformer, full-wave rectification bridge, 12V exports three terminal regulator and 5V exports three terminal regulator, 15V transformer is connected with full-wave rectification bridge, full-wave rectification bridge connects described 12V and exports three terminal regulator and 5V output three terminal regulator, and described 5V exports three terminal regulator and is connected with described single-chip microcomputer.
7. a kind of examination hall according to claim 1 intelligent management system, is characterized in that: described remote monitoring control centre comprises communication control server, database purchase server, Streaming Media monitoring server, Database Administration Server and cloud computing server; Described cloud computing server connects described database purchase server, and database purchase server is connected according to library management server with number is described.
8. a kind of examination hall according to claim 7 intelligent management system, it is characterized in that: described ZigBee wireless network is the tree network based on ZigBee, and the tree network based on ZigBee comprises coordinator node, multiple router node and multiple terminal node; Described coordinator node is set up a ZigBee tree network and is safeguarded this network information; Described router node Maintenance Point routing table, and the data in transmission network; Described terminal node and described examination hall video acquisition point terminal or the total terminal of video acquisition carry out transport communication with the communication mode of USB; Described coordinator node, router node and terminal node are wireless ZigBee radio-frequency (RF) transceiver, and wireless ZigBee radio-frequency (RF) transceiver comprises power module, microcontroller, ZigBee rf chip and radio-frequency (RF) power amplification circuit; Described power module adopts balun to carry out voltage transitions.
9. a kind of examination hall according to claim 8 intelligent management system, is characterized in that: described wireless network communication is GPRS or cdma wireless network.
CN201510282074.3A 2015-05-28 2015-05-28 A kind of examination hall intelligent management system Active CN104935880B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106934985A (en) * 2017-02-20 2017-07-07 北京印刷学院 A kind of system of examination hall invigilator and the application method of the system
CN109859084A (en) * 2019-02-21 2019-06-07 无锡加视诚智能科技有限公司 A kind of place education intelligent monitoring system
CN116614797A (en) * 2023-04-07 2023-08-18 广东保伦电子股份有限公司 Electronic examination method, device and medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201048390Y (en) * 2007-05-31 2008-04-16 西安电子科技大学 Classroom building monitor and management system
CN201364600Y (en) * 2008-10-13 2009-12-16 张志科 Examination room timer
CN102348101A (en) * 2010-07-30 2012-02-08 深圳市先进智能技术研究所 Examination room intelligence monitoring system and method thereof
CN102857734A (en) * 2011-06-27 2013-01-02 毛振刚 Network electronic invigilating system
CN103002267A (en) * 2012-10-26 2013-03-27 弓伟南 Examination management system
CN104346962A (en) * 2014-11-19 2015-02-11 国家电网公司 Network centralized control multimedia classroom device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201048390Y (en) * 2007-05-31 2008-04-16 西安电子科技大学 Classroom building monitor and management system
CN201364600Y (en) * 2008-10-13 2009-12-16 张志科 Examination room timer
CN102348101A (en) * 2010-07-30 2012-02-08 深圳市先进智能技术研究所 Examination room intelligence monitoring system and method thereof
CN102857734A (en) * 2011-06-27 2013-01-02 毛振刚 Network electronic invigilating system
CN103002267A (en) * 2012-10-26 2013-03-27 弓伟南 Examination management system
CN104346962A (en) * 2014-11-19 2015-02-11 国家电网公司 Network centralized control multimedia classroom device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106934985A (en) * 2017-02-20 2017-07-07 北京印刷学院 A kind of system of examination hall invigilator and the application method of the system
CN109859084A (en) * 2019-02-21 2019-06-07 无锡加视诚智能科技有限公司 A kind of place education intelligent monitoring system
CN116614797A (en) * 2023-04-07 2023-08-18 广东保伦电子股份有限公司 Electronic examination method, device and medium

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