CN102629408A - Anti-theft alarm system and method of notebook computer - Google Patents

Anti-theft alarm system and method of notebook computer Download PDF

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Publication number
CN102629408A
CN102629408A CN201210108881XA CN201210108881A CN102629408A CN 102629408 A CN102629408 A CN 102629408A CN 201210108881X A CN201210108881X A CN 201210108881XA CN 201210108881 A CN201210108881 A CN 201210108881A CN 102629408 A CN102629408 A CN 102629408A
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China
Prior art keywords
notebook computer
identity information
office terminal
monitoring device
control signal
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CN201210108881XA
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Chinese (zh)
Inventor
费树培
朱青松
谢耀钦
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Shenzhen Institute of Advanced Technology of CAS
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Shenzhen Institute of Advanced Technology of CAS
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Priority to CN201210108881XA priority Critical patent/CN102629408A/en
Publication of CN102629408A publication Critical patent/CN102629408A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an anti-theft alarm method of a notebook computer. The anti-theft alarm method comprises the following steps of: detecting movement of the notebook computer through a monitoring device which is connected to a plurality of notebook computers of a plurality of rooms on a plurality of floors through peripherals; wirelessly emitting a control signal with identity information when detecting that the movement reaches a preset condition; receiving the control signal with the identity information through a plurality of relay platforms on a plurality of floors respectively; forwarding to a management terminal at the position of management personnel in a wireless mode; receiving and responding the control signal with identity through the management terminal and emitting alarm; and displaying the position represented by the identity information by the management terminal according to the control signal with the identity information. The invention also provides a corresponding anti-theft alarm system of the notebook computer. According to the method and the system, networked centralized anti-theft alarm of the notebook computers of a plurality of scattered users is realized, and a timely and effective anti-theft alarm effect is achieved.

Description

Antitheft alarming system for notebook computer and method
Technical field
The present invention relates to the electronic anti-theft field, particularly relate to a kind of warning system and method that realizes that many notebook computers are guarded against theft simultaneously.
Background technology
At present, along with the decline of notebook computer price, common young man particularly student enrollment postgraduate has become the main force that notebook computer is bought, and the popularity rate of university student postgraduate's notebook computer has reached a very high level.Like library, room for individual study and at dormitory, notebook computer is seen everywhere in public.But because the portable characteristics of notebook computer, the thing followed notebook computer problem of losing never is well solved, and this is a dormitory management problem, also is the problem of notebook computer user individual prevention awareness.
To the problem of losing of notebook computer, following product has appearred on the market now:
A kind of is notebook computer antitheft lock, and theftproof lock is through a wirerope notebook computer to be connected to reach the purpose of antitheft with a certain fixing object on every side.A lockhole is all arranged on most notebook computers, and computer lock is realized and being connected of notebook computer through this lockhole just; But theftproof lock uses trouble, and under the situation that long-time nobody keeps an eye on, the burglar still is easy to destroy theftproof lock.
Another kind is that notebook computer is followed the trail of software; In a lot of serial notebook computers, used, principle is after notebook is lost, if the burglar surfs the Net in the somewhere; Follow the trail of software and will burglar's log-on message be sent to the user; Though this kind method has certain effect, the effect of instant antitheft is not played in a kind of strick precaution afterwards.
Classic method all can not be reported to the police timely and effectively and can not be realized many burglar alarm management that notebook computer is unified.
Summary of the invention
Based on this; Be necessary all can not to report to the police timely and effectively and can not realize many burglar alarm problems of management that notebook computer is unified, provide a kind of and can the antitheft alarming system for notebook computer and the method for burglar alarm timely and effectively be provided for many notebook computers to classic method.
A kind of antitheft alarming system for notebook computer comprises: a plurality of monitoring devices, a plurality of relaying platform and an office terminal,
Said a plurality of monitoring device is distributed in a plurality of rooms of a plurality of floors, is connected with many notebook computers respectively; Said a plurality of relaying platform is separately positioned on said a plurality of floor; Said office terminal is arranged on the managerial personnel position,
Said monitoring device comprises: USB interface, acceleration transducer, detecting unit and transmitter unit,
Said USB interface be used for notebook computer on the USB jack be connected;
Said acceleration transducer is used to respond to moving of said monitoring device, produces corresponding mobile induced signal;
Whether said detecting unit is used to detect said mobile induced signal and satisfies pre-conditionedly, and gives said transmitter unit satisfying pre-conditioned time transmission trigger pip.
Said transmitter unit is used to respond said trigger pip, sends the control signal of band identity information through wireless mode and gives said relaying platform;
Said relaying platform comprises: receiving element and delivery unit,
Said receiving element is used for receiving through wireless mode the control signal of the band identity information that said monitoring device sends;
The control signal of the band identity information that said delivery unit is used for said receiving element is received is transmitted to said office terminal through wireless mode;
Said office terminal comprises: receiver, recognition unit and display unit,
Said receiver is used for receiving through wireless mode the control signal of the band identity information that said relaying platform sends;
Said recognition unit is used for distinguishing the out-of-the way position information that obtains through the identity information of the control signal of band identity information;
Said display unit is used to show the position of said out-of-the way position information representation.
Among embodiment, said monitoring device is self-powered therein, and the work that is used to said monitoring device provides work energy.
Among embodiment, said monitoring device also comprises charhing unit therein, is used for obtaining electric energy through USB interface from notebook computer, and gives said power source charges.
Among embodiment, said relaying platform also comprises acceleration transducer and control module therein,
Said acceleration transducer is used to respond to moving of said relaying platform, produces movable information;
Said control module is used for when said movable information reaches pre-set threshold value, sends the alerting signal of band identity information through said delivery unit and gives said office terminal;
The recognition unit of said office terminal also is used for distinguishing the out-of-the way position information that obtains through the identity information of the alerting signal of band identity information, and shows the position of this out-of-the way position information representation through display unit.
Among embodiment, said office terminal also comprises alarm unit, is used to respond said alerting signal and sends warning reminding therein
Among embodiment, it is characterized in that said office terminal also comprises alarm unit therein, be used to respond said control signal and send warning reminding.
Among embodiment, said office terminal also comprises communication unit therein, is used to respond the control signal of band identity information, sends reminding short message through cell phone network and gives respective user or dial the respective user mobile phone.
Among embodiment, said monitoring device, said relaying platform and said office terminal all possess radio transmission-receiving function therein;
Communication unit described in the said office terminal is used to receive the preset SMS that user mobile phone sends, and responds said preset SMS and give said supervising device through said relaying platform transmit button signal;
Said monitoring device is used to respond said switching signal, starts and closing motion.
A kind of notebook computer antitheft alarm method comprises the steps:
Be connected the monitoring device on a plurality of notebook computers in a plurality of rooms of a plurality of floors through peripheral hardware, detect moving of notebook, and move when reaching pre-conditioned the wireless control signal of sending the band identity information detecting;
Receive the control signal of said band identity information through a plurality of relaying platforms that are separately positioned on said a plurality of floors, and be transmitted to the office terminal that is arranged on the managerial personnel position through wireless mode;
Receive and respond the control signal of said band identity through said office terminal, send warning;
The office terminal shows the represented position of identity information according to the control signal of said band identity information.
Among embodiment, also comprise the steps: therein
Said office terminal is sent note according to the identification signal in the control signal through cell phone network and is given respective user or dial the respective user mobile phone.
Among embodiment, also comprise the steps: therein
Said relaying platform self moves through acceleration transducer induction, and is moving when reaching pre-set threshold value the wireless alerting signal of sending the band identity information;
Said office terminal responds said alerting signal, sends warning;
Said office terminal shows the position that said identity information is represented according to the identity information in the alerting signal
Among embodiment, said office terminal receives the preset SMS that the user sends therein, and responds said preset SMS and give said monitoring device through said relaying platform transmit button signal;
Said monitoring device responds said switching signal, starts or stops the work of self.
Above-mentioned antitheft alarming system for notebook computer and method are through setting up the burglar alarm network between a plurality of rooms and floor and administrative office.When user's notebook computer moved unusually/when moving; Monitoring device is just sensed this action through acceleration transducer; And the relaying platform through this storey setting sends wireless alarm signal and to the office terminal of keeper position, reports to the police, and realized the anti-theft alarm function of the many rooms of network management and many floors.Particularly under the unserviced situation of notebook computer, this antitheft alarming system for notebook computer is particularly suitable.The purpose that the relaying platform is set be because monitoring device for portable, volume is less, wireless signal transmission distance is limited, thereby through setting up the coverage that the stronger relaying platform of emissive power enlarges the antitheft network.
Monitoring device is self-powered be can the person of avoiding theft before moving notebook computer, pull up monitoring device, monitoring device can't be worked because of outage.Simultaneously, monitoring device under the situation of notebook computer shutdown or nothing electricity, also can be worked on.
Acceleration transducer and control module be set on the relaying platform be for the person of avoiding theft before stealing notebook computer, destroy the relaying platform earlier.After acceleration transducer and control module were set, even the thief wants to smash the relaying platform, in the process of beaing, the acceleration transducer in the relaying platform also can be sensed vibrations/tiny moving immediately, thereby in time sends alerting signal.
The setting of communication unit is the user of unusual notebook computer taking place in order to inform in the very first time in the office terminal, and the timely service of hommization is provided.
Through the communication between preset SMS and monitoring device, relaying platform and the office terminal, the user only just can start or stop the function of monitoring device with a mobile phone easily, and can understand the security situation of own notebook computer.And need not reduce cost for monitoring device is provided with special remote-control key.
Description of drawings
Fig. 1 is the configuration diagram of the antitheft alarming system for notebook computer of an embodiment;
Fig. 2 is the functional block diagram of each module in the antitheft alarming system for notebook computer shown in Figure 1;
Fig. 3 is the process flow diagram of the notebook computer antitheft alarm method of an embodiment.
Embodiment
The objective of the invention is at the antitheft platform of introducing a networking like the multi-user zone of dormitory building class; As shown in Figure 1; It is the configuration diagram of the antitheft alarming system for notebook computer 10 of an embodiment, comprising: a plurality of monitoring device 101, a plurality of relaying platform 102 and office terminal 103.
A plurality of monitoring devices 101 are distributed in a plurality of rooms of a plurality of floors, are connected with a plurality of notebook computers respectively.As connecting said a plurality of monitoring device respectively on many notebook computers in a plurality of dormitories of a plurality of floors of or many dormitory buildings.In the present embodiment, the similar USB flash disk of monitoring device 101 profiles.
A plurality of relaying platforms 102 are separately positioned on a plurality of floors.Promptly there is the floor that needs that a relaying platform 102 is installed at each.
Office terminal 103 is arranged on the managerial personnel position.As be arranged on houseparent room or security chamber.
Monitoring device 101 comprises: power supply 112, usb 1 13, charhing unit 114, acceleration transducer 115, detecting unit 116 and transmitter unit 117.
Power supply 112 is used for electric energy to the work of monitoring device 101 being provided.
Usb 1 13 be used for notebook computer on the USB jack be connected.
Charhing unit 114 is used for obtaining electric energy through USB interface from notebook computer, and gives said power supply 112 chargings.
Acceleration transducer 115 is used for moving of induction monitoring device 101, produces corresponding mobile induced signal.
Whether detecting unit 116 is used to detect said mobile induced signal and satisfies pre-conditionedly, and gives transmitter unit 117 satisfying pre-conditioned time transmission trigger pip.
Transmitter unit 117 is used to respond said trigger pip, sends the control signal of band identity information through wireless mode and gives relaying platform 102.
Relaying platform 102 comprises: receiving element 121, delivery unit 122, acceleration transducer 123 and control module 124.
Receiving element 121 is used for receiving through wireless mode the control signal of the band identity information that monitoring device 101 sends.
The control signal of the band identity information that delivery unit 122 is used for receiving element 121 is received is transmitted to office terminal 103 through wireless mode.
Acceleration transducer 123 is used to respond to moving of relaying platform 102, produces movable information.
Control module 124 is used for when said movable information reaches pre-set threshold value, sends the alerting signal of band identity information through delivery unit 122 and gives office terminal 103.
Office terminal 103 comprises: receiver 131, recognition unit 132, alarm unit 133, display unit 134 and communication unit 135.
Receiver 131 is used for receiving through wireless mode the control signal and the alerting signal of the band identity information that relaying platform 102 sends.
Recognition unit 132 is used for distinguishing the out-of-the way position information that obtains through the control signal of band identity information and the identity information of alerting signal.
The position of stolen room or floor possibly take place in said out-of-the way position information representation.
Alarm unit 133 is used to respond said control signal or alerting signal is sent warning reminding.
Type of alarm can be an alarm sound, warning light etc.
Display unit 134 is used to show the position of said out-of-the way position information representation.
Display mode can be a screen display, also can be that the pilot lamp mode corresponding with room or floor shows.
Communication unit 135 is used to respond the control signal of band identity information, sends reminding short message through cell phone network and gives respective user or dial the respective user mobile phone.
Above-mentioned antitheft alarming system for notebook computer 10 is through setting up the burglar alarm network between a plurality of rooms and floor and administrative office.When user's notebook computer moved unusually/when moving; Monitoring device 101 is just sensed this action through acceleration transducer; And the relaying platform through this storey setting 102 sends wireless control signals and to the office terminal 103 of keeper position, reports to the police, and realized the anti-theft alarm function of many rooms of network management and floor.Particularly under the unserviced situation of notebook computer, this antitheft alarming system for notebook computer 10 is particularly suitable.The purpose that relaying platform 102 is set be because monitoring device 101 for portable, volume is less, wireless signal transmission distance is limited, thereby through setting up the coverage that the stronger relaying platform of emissive power 102 enlarges the antitheft networks.
Monitoring device 101 self-powered 114 be can the person of avoiding theft before moving notebook computer, pull up monitoring device 101, monitoring device 101 can't be worked because of outage.Simultaneously, monitoring device 101 under the situation of notebook computer shutdown or nothing electricity, also can be worked on.
Acceleration transducer 123 and control module 124 be set on the relaying platform 102 be for the person of avoiding theft before stealing notebook computer, destroy relaying platform 102 earlier.After acceleration transducer 123 and control module 124 were set, even the thief wants to smash relaying platform 102, in the process of beaing, the acceleration transducers 123 in the relaying platform 102 also can be sensed vibrations/tiny moving immediately, thereby in time send alerting signal.
The setting of communication unit 134 is the users of unusual notebook computer taking place in order to inform in the very first time in the office terminal 103, and the timely service of hommization is provided.
For the user can start and close monitoring device 101 easily, in another embodiment, said monitoring device 101, relaying platform 102 and office terminal 103 all possess radio transmission-receiving function.
Communication unit 134 is used to receive the preset SMS that user mobile phone sends in the office terminal 103, and the response preset SMS is given supervising device 101 through relaying platform 102 transmit button signals.
Said preset SMS comprises request unlatching monitoring device 101 and 101 two kinds of request close monitoring devices.
Monitoring device 101 is used to respond said switching signal, starts and closing motion.Promptly start working and quit work.
Need not reduce cost like this for monitoring device 101 is provided with special remote-control key.The user only just can start or stop the function of monitoring device with a mobile phone easily, and can understand the security situation of own notebook computer.
As shown in Figure 3, it is the flow chart of steps of the notebook computer antitheft alarm method of an embodiment, comprises the steps:
Step S301 is connected the monitoring device on a plurality of notebook computers in a plurality of rooms of a plurality of floors through peripheral hardware, detect moving of notebook, and moves when reaching pre-conditioned the wireless control signal of sending the band identity information detecting.
In the present embodiment, said monitoring device is self-powered, and is connected with notebook computer through USB interface, and passes through USB interface to self-powered charging.
Step S302 receives the control signal of said band identity information through a plurality of relaying platforms that are separately positioned on said a plurality of floors, and is transmitted to the office terminal that is arranged on the managerial personnel position through wireless mode.
Step S303 receives and responds the control signal of said band identity through the office terminal, sends warning.
Step S304, the office terminal shows the represented position of identity information according to the control signal of said band identity information.
Step S305, the office terminal is sent note according to the identification signal in the control signal through cell phone network and is given respective user or dial the respective user mobile phone.
Step S306, the relaying platform self moves through acceleration transducer induction, and is moving when reaching pre-set threshold value the wireless alerting signal of sending the band identity information.
Step S307, the office terminal responds said alerting signal, sends warning.
Step S308, the office terminal shows the position that said identity information is represented according to the identity information in the alerting signal.
Above-mentioned notebook computer antitheft alarm method is through setting up the burglar alarm network between a plurality of rooms and floor and administrative office.When user's notebook computer moved unusually/when moving; Monitoring device is just sensed this action through acceleration transducer; And the relaying platform through this storey setting sends on the office terminal of managerial personnel position and reports to the police, and realized the anti-theft alarm function of many rooms of network management and floor.Particularly under the unserviced situation of notebook computer, this notebook computer antitheft alarm method is particularly suitable.The purpose that the relaying platform is set be because monitoring device for portable, volume is less, wireless signal transmission distance is limited, thereby through setting up the coverage that the stronger relaying platform of emissive power enlarges the antitheft network.
Monitoring device is self-powered be can the person of avoiding theft before moving notebook computer, pull up monitoring device, monitoring device can't be worked because of outage.
Acceleration transducer and control module be set on the relaying platform be for the person of avoiding theft before stealing notebook computer, destroy the relaying platform earlier.After acceleration transducer and control module were set, even the thief wants to smash the relaying platform, in the process of beaing, the acceleration transducer in the relaying platform also can be sensed vibrations/tiny moving immediately, thereby in time sends alerting signal.
Among other embodiment, said notebook computer antitheft alarm method can also comprise the steps:
The office terminal receives the preset SMS that the user sends, and responds said preset SMS and give said monitoring device through said relaying platform transmit button signal.
Said monitoring device responds said switching signal, starts or stops the work of self.
Said preset SMS comprises request unlatching monitoring device and two kinds of request close monitoring devices.
Need not reduce cost like this for monitoring device is provided with special remote-control key.The user only just can start or stop the function of monitoring device with a mobile phone easily, and can understand the security situation of own notebook computer.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.

Claims (12)

1. an antitheft alarming system for notebook computer is characterized in that, comprising: a plurality of monitoring devices, a plurality of relaying platform and an office terminal,
Said a plurality of monitoring device is distributed in a plurality of rooms of a plurality of floors, is connected with many notebook computers respectively; Said a plurality of relaying platform is separately positioned on said a plurality of floor; Said office terminal is arranged on the managerial personnel position,
Said monitoring device comprises: USB interface, acceleration transducer, detecting unit and transmitter unit,
Said USB interface be used for notebook computer on the USB jack be connected;
Said acceleration transducer is used to respond to moving of said monitoring device, produces corresponding mobile induced signal;
Whether said detecting unit is used to detect said mobile induced signal and satisfies pre-conditionedly, and gives said transmitter unit satisfying pre-conditioned time transmission trigger pip.
Said transmitter unit is used to respond said trigger pip, sends the control signal of band identity information through wireless mode and gives said relaying platform;
Said relaying platform comprises: receiving element and delivery unit,
Said receiving element is used for receiving through wireless mode the control signal of the band identity information that said monitoring device sends;
The control signal of the band identity information that said delivery unit is used for said receiving element is received is transmitted to said office terminal through wireless mode;
Said office terminal comprises: receiver, recognition unit and display unit,
Said receiver is used for receiving through wireless mode the control signal of the band identity information that said relaying platform sends;
Said recognition unit is used for distinguishing the out-of-the way position information that obtains through the identity information of the control signal of band identity information;
Said display unit is used to show the position of said out-of-the way position information representation.
2. antitheft alarming system for notebook computer according to claim 1 is characterized in that said monitoring device is self-powered, and the work that is used to said monitoring device provides work energy.
3. antitheft alarming system for notebook computer according to claim 2 is characterized in that said monitoring device also comprises charhing unit, is used for obtaining electric energy through USB interface from notebook computer, and gives said power source charges.
4. antitheft alarming system for notebook computer according to claim 1 is characterized in that, said relaying platform also comprises acceleration transducer and control module,
Said acceleration transducer is used to respond to moving of said relaying platform, produces movable information;
Said control module is used for when said movable information reaches pre-set threshold value, sends the alerting signal of band identity information through said delivery unit and gives said office terminal;
The recognition unit of said office terminal also is used for distinguishing the relaying platform out-of-the way position information that obtains through the identity information of the alerting signal of band identity information, and shows the position of this out-of-the way position information representation through display unit.
5. antitheft alarming system for notebook computer according to claim 4 is characterized in that said office terminal also comprises alarm unit, is used to respond said alerting signal and sends warning reminding.
6. according to any described antitheft alarming system for notebook computer in the claim 1 to 5, it is characterized in that said office terminal also comprises alarm unit, be used to respond said control signal and send warning reminding.
7. antitheft alarming system for notebook computer according to claim 1; It is characterized in that; Said office terminal also comprises communication unit, is used to respond the control signal of band identity information, sends reminding short message through cell phone network and gives respective user or dial the respective user mobile phone.
8. antitheft alarming system for notebook computer according to claim 1 is characterized in that, said monitoring device, said relaying platform and said office terminal all possess radio transmission-receiving function;
Communication unit described in the said office terminal is used to receive the preset SMS that user mobile phone sends, and responds said preset SMS and give said supervising device through said relaying platform transmit button signal;
Said monitoring device is used to respond said switching signal, starts and closing motion.
9. a notebook computer antitheft alarm method is characterized in that, comprises the steps:
Be connected the monitoring device on a plurality of notebook computers in a plurality of rooms of a plurality of floors through peripheral hardware, detect moving of notebook, and move when reaching pre-conditioned the wireless control signal of sending the band identity information detecting;
Receive the control signal of said band identity information through a plurality of relaying platforms that are separately positioned on said a plurality of floors, and be transmitted to the office terminal that is arranged on the managerial personnel position through wireless mode;
Receive and respond the control signal of said band identity through said office terminal, send warning;
The office terminal shows the represented position of identity information according to the control signal of said band identity information.
10. notebook computer antitheft alarm method according to claim 9 is characterized in that, also comprises the steps:
Said office terminal is sent note according to the identification signal in the control signal through cell phone network and is given respective user or dial the respective user mobile phone.
11. notebook computer antitheft alarm method according to claim 9 is characterized in that, also comprises the steps:
Said relaying platform self moves through acceleration transducer induction, and is moving when reaching pre-set threshold value the wireless alerting signal of sending the band identity information;
Said office terminal responds said alerting signal, sends warning;
Said office terminal shows the position that said identity information is represented according to the identity information in the alerting signal.
12. notebook computer antitheft alarm method according to claim 9 is characterized in that, also comprises the steps:
Said office terminal receives the preset SMS that the user sends, and responds said preset SMS and give said monitoring device through said relaying platform transmit button signal;
Said monitoring device responds said switching signal, starts or stops the work of self.
CN201210108881XA 2012-04-13 2012-04-13 Anti-theft alarm system and method of notebook computer Pending CN102629408A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103839345A (en) * 2012-11-27 2014-06-04 联想(北京)有限公司 Information processing method and electronic equipment
CN104881939A (en) * 2015-06-16 2015-09-02 山东大学 Laptop theft prevention system based on ZigBee and GSM, and working method thereof

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN101059904A (en) * 2006-03-03 2007-10-24 王胤 A mobile communication network-based intelligent anti-theft alarm device
WO2010017658A1 (en) * 2008-08-15 2010-02-18 万创科技有限公司 Anti-theft detecting apparatus of notebook computer
CN202025395U (en) * 2011-04-15 2011-11-02 华南理工大学 Real time monitoring antitheft system for laptop

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101059904A (en) * 2006-03-03 2007-10-24 王胤 A mobile communication network-based intelligent anti-theft alarm device
WO2010017658A1 (en) * 2008-08-15 2010-02-18 万创科技有限公司 Anti-theft detecting apparatus of notebook computer
CN202025395U (en) * 2011-04-15 2011-11-02 华南理工大学 Real time monitoring antitheft system for laptop

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103839345A (en) * 2012-11-27 2014-06-04 联想(北京)有限公司 Information processing method and electronic equipment
CN104881939A (en) * 2015-06-16 2015-09-02 山东大学 Laptop theft prevention system based on ZigBee and GSM, and working method thereof

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Application publication date: 20120808