CN205050274U - Notebook theftproof alarm system based on pressure sensor - Google Patents
Notebook theftproof alarm system based on pressure sensor Download PDFInfo
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- CN205050274U CN205050274U CN201520845319.4U CN201520845319U CN205050274U CN 205050274 U CN205050274 U CN 205050274U CN 201520845319 U CN201520845319 U CN 201520845319U CN 205050274 U CN205050274 U CN 205050274U
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Abstract
The utility model discloses a notebook theftproof alarm system based on pressure sensor belongs to notebook theftproof technical field. The utility model discloses a pressure sensor, voltage amplifier circuit, relay switch, acousto -optic warning circuit and control circuit power VCC, pressure sensor and voltage amplifier circuit's input link to each other, this voltage amplifier circuit output and relay switch are continuous, relay switch's output termination acousto -optic warning circuit, control circuit power VCC for entire system power supply. The utility model discloses need not the manual theftproof function of opening, as long as the notebook is moved, trigger the alarm promptly, in time remind people notebook computer to be moved by the people, the security that has improved notebook computer greatly.
Description
Technical field
The utility model relates to burglary prevention of laptop technical field, more particularly, relates to a kind of burglary prevention of laptop warning system based on pressure transducer.
Background technology
Notebook computer is because compact, and the advantage such as to be easy to carry is liked deeply by people and favors, and people such as conveniently to go on business at the mobile environment for use, usually select notebook computer.But, exactly because the feature of also notebook computer compact, the object causing it to become thief stealing.The anti-theft technique of current desktop computer is relatively ripe, because desktop computer position is fixed, anti-theft device designs well, installs, warning starting switch can be arranged on concealed location, and it is relatively blank for the anti-theft technique of notebook, substantially be all that some theftproof locks are set, the burglar alarm technology of desktop computer can not be applied mechanically.And because the position of notebook computer is not fixed, warning starting switch can only be arranged on the fuselage of notebook, but easily like this to be found by thief, again because existing warning starting switch designs still existing defects, thief can easily be removed, and therefore existing notebook computer antitheft scheme can not play good anti-theft effect.
Through retrieval, China Patent No. ZL201320826490.1, authorized announcement date is on June 18th, 2014, invention and created name is: theft alarm for notebook computer, this application case is made up of the loudspeaker be fixed in shell, controller and vibration sensor, and vibration sensor is electrically connected with loudspeaker by controller; Vibration sensor is provided with the housing of mercury bead by inside, at least two pairs of electrodes be fixed in this housing are formed.This application case aims to provide a kind of alarm that can send acoustic alarm signal when cutting off or moving notebook computer, but this application case alarm is connected with notebook computer by transmission line, thief is very easy to find, thus left the chance that thief manages to remove alarm for, still there is the risk that notebook computer is stolen.
China Patent No. ZL201520258372.4, authorized announcement date is on July 29th, 2015, invention and created name is: a kind of warning system for burglary prevention of laptop, the conversion of this application case involving vibrations sensor B, electric signal and amplifying circuit, control circuit power supply VCC, astable multivibrator and alarming horn BL; Described vibration transducer B is connected with the input end of amplifying circuit with electric signal conversion, the conversion of this electric signal is connected with amplifying circuit and astable multivibrator, the output terminal of astable multivibrator connects alarming horn BL, and described control circuit power supply VCC is that whole system is powered.This application case comparatively installs vibration transducer in shelter at notebook computer, no matter thief wants to steal computer or attempt to remove this vibration transducer, vibration transducer action is triggered in capital, and then trigger alarm circuit working, send alerting signal, reach antitheft object, but the reaction sensitivity of the vibration transducer of this application case has much room for improvement, easily cause false alarm, still need further improvement.
Summary of the invention
1. the utility model technical matters that will solve
The purpose of this utility model is that notebook computer, easily by the problem of stealing, provides a kind of burglary prevention of laptop warning system based on pressure transducer in order under solving non-family safe environment service condition; Use the technical scheme that the utility model provides, without the need to manually opened anti-theft feature, as long as notebook is moved, i.e. alert trigger, reminds people's notebook computer to be moved by people in time, substantially increases the security of notebook computer.
2. technical scheme
For achieving the above object, the technical scheme that the utility model provides is:
A kind of burglary prevention of laptop warning system based on pressure transducer of the present utility model, comprise pressure transducer, voltage amplifier circuit, relay switch, sound light alarming circuit and control circuit power supply VCC, described pressure transducer is connected with the input end of voltage amplifier circuit, this voltage amplifier circuit output terminal is connected with relay switch, the output termination sound light alarming circuit of described relay switch; Described control circuit power supply VCC is that whole system is powered.
Further improve as the utility model, described voltage amplifier circuit comprises triode VT1, resistance R1, R2, R3, R4, R5, R6, R7, slide rheostat RP, electric capacity C1, C2, C3; One end of pressure transducer is connected with the base stage of triode VT1 through resistance R1, electric capacity C1, the base stage of triode VT1 is also connected with one end of resistance R2, resistance R3 respectively, the other end of resistance R2 is connected with one end of slide rheostat RP, the collector of triode VT1 is connected with one end of resistance R4, electric capacity C3 respectively, and the other end of slide rheostat RP, resistance R4 is all connected with control circuit power supply VCC; The other end of electric capacity C3 is then connected with relay K, and the two ends of relay K are parallel with resistance R7; The emitter of triode VT1 is connected with resistance R6 through resistance R5, and the two ends of resistance R6 are parallel with electric capacity C2; The equal ground connection of the other end of described pressure transducer, resistance R3, resistance R6, relay K.
Further improve as the utility model, described sound light alarming circuit comprises triode VT2, VT3, resistance R8, R9, R10, R11, electric capacity C4, C5, diode D1, light emitting diode D2, loudspeaker SP; Control circuit power supply VCC is connected with the collector of resistance R8, resistance R9, triode VT3 respectively, and resistance R8 connects with diode D1, relay normally closed switch S; Resistance R9 is connected with resistance R10, the other end of relay normally closed switch S, the negative pole of loudspeaker SP respectively, the other end of resistance R10 is connected with the base stage of triode VT2, the collector of triode VT2 is connected with the base stage of triode VT3 through resistance R11, and the emitter of triode VT3 is then connected with the positive pole of loudspeaker SP through light emitting diode D2; The emitter of triode VT2 is also connected with the other end of relay normally closed switch S; Described electric capacity C4 one end is connected with resistance R10, and the other end and relay normally closed switch S-phase connect; Described electric capacity C5 one end is connected with the base stage of triode VT2, and the other end is connected with the emitter of triode VT3.
3. beneficial effect
The technical scheme adopting the utility model to provide, compared with existing known technology, has following beneficial effect:
(1) a kind of burglary prevention of laptop warning system based on pressure transducer of the present utility model, devise light emitting diode and loudspeaker, loudspeaker alarm of sounding can allow thief panic, send light warning at illuminating at night diode and also can play the position of reminding people thief and notebook computer, make thief abandon notebook and run away, the property of people is not suffered a loss;
(2) a kind of burglary prevention of laptop warning system based on pressure transducer of the present utility model, battery is adopted to power to whole system, as long as install battery, this warning system is just in starting state, without the need to manually opened anti-theft feature, as long as notebook computer is moved i.e. alert trigger, people's notebook is reminded to be moved by people in time;
(3) a kind of burglary prevention of laptop warning system based on pressure transducer of the present utility model, itself and notebook computer are two relatively independent devices, there is no connection physically, be convenient for carrying and use, and be convenient to be transplanted on other equipment antitheft, there is certain applicability and promotional value.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of a kind of burglary prevention of laptop warning system based on pressure transducer of the present utility model;
Fig. 2 is the circuit diagram of a kind of burglary prevention of laptop warning system based on pressure transducer of the present utility model.
Embodiment
For understanding content of the present utility model further, in conjunction with the accompanying drawings and embodiments the utility model is described in detail.
Embodiment 1
Composition graphs 1, a kind of burglary prevention of laptop warning system based on pressure transducer of the present embodiment, comprise pressure transducer, voltage amplifier circuit, relay switch, sound light alarming circuit and control circuit power supply VCC, described pressure transducer is connected with the input end of voltage amplifier circuit, this voltage amplifier circuit output terminal is connected with relay switch, the output termination sound light alarming circuit of described relay switch; Described control circuit power supply VCC is that whole system is powered.
Pressure transducer is arranged on the device of similar radiating bottom plate by the present embodiment, and making thief take for alarm is radiating bottom plate, makes warning system have more disguise and duplicity.No matter thief wants to steal computer or attempt to remove pressure transducer, all can triggering alarm system action, sends alerting signal, reaches antitheft object, have better anti-theft effect.Referring to Fig. 2, analyze below in conjunction with the burglar alarm principle of physical circuit to the present embodiment:
The voltage amplifier circuit of the present embodiment comprises triode VT1, resistance R1, R2, R3, R4, R5, R6, R7, slide rheostat RP, electric capacity C1, C2, C3; One end of pressure transducer is connected with the base stage of triode VT1 through resistance R1, electric capacity C1, the base stage of triode VT1 is also connected with one end of resistance R2, resistance R3 respectively, the other end of resistance R2 is connected with one end of slide rheostat RP, the collector of triode VT1 is connected with one end of resistance R4, electric capacity C3 respectively, and the other end of slide rheostat RP, resistance R4 is all connected with control circuit power supply VCC; The other end of electric capacity C3 is then connected with relay K, and the two ends of relay K are parallel with resistance R7; The emitter of triode VT1 is connected with resistance R6 through resistance R5, and the two ends of resistance R6 are parallel with electric capacity C2; The equal ground connection of the other end of described pressure transducer, resistance R3, resistance R6, relay K.
Described sound light alarming circuit comprises triode VT2, VT3, resistance R8, R9, R10, R11, electric capacity C4, C5, diode D1, light emitting diode D2, loudspeaker SP; Control circuit power supply VCC is connected with the collector of resistance R8, resistance R9, triode VT3 respectively, and resistance R8 connects with diode D1, relay normally closed switch S; Resistance R9 is connected with resistance R10, the other end of relay normally closed switch S, the negative pole of loudspeaker SP respectively, the other end of resistance R10 is connected with the base stage of triode VT2, the collector of triode VT2 is connected with the base stage of triode VT3 through resistance R11, and the emitter of triode VT3 is then connected with the positive pole of loudspeaker SP through light emitting diode D2; The emitter of triode VT2 is also connected with the other end of relay normally closed switch S; Described electric capacity C4 one end is connected with resistance R10, and the other end and relay normally closed switch S-phase connect; Described electric capacity C5 one end is connected with the base stage of triode VT2, and the other end is connected with the emitter of triode VT3.
The present embodiment adopts the direct supply (i.e. dry cell) of 12V to power to whole system, as long as install battery, this warning system is just in starting state, without the need to manually opened anti-theft feature.When notebook be fixed position motionless time, the pressure transducer be arranged on laptop radiating base plate is subject to the voltage that notebook computer own wt produces, the powered work of relay K, relay normally closed switch S obtains electric disconnection, and light emitting diode D2 and loudspeaker SP does not work.When notebook computer is moved, the voltage that pressure transducer will be made to detect is reduced to smaller value or is directly zero, do not act on relay K, relay normally closed switch S dead electricity closes, and loudspeaker SP alarm of sounding can allow thief panic, sends light report to the police at illuminating at night diode D2, play the position of reminding people thief and notebook computer, make thief abandon notebook and run away, the property of people is not suffered a loss, substantially increases the security of notebook computer.In addition, the warning system of the present embodiment is two relatively independent devices with notebook computer, there is no connection physically, be convenient for carrying and use, be convenient to be transplanted on other equipment antitheft, and circuit structure is simple, low cost of manufacture, controls highly sensitive, easy to utilize.
Schematically above be described the utility model and embodiment thereof, this description does not have restricted, and also just one of the embodiment of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the frame mode similar to this technical scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.
Claims (3)
1. the burglary prevention of laptop warning system based on pressure transducer, it is characterized in that: comprise pressure transducer, voltage amplifier circuit, relay switch, sound light alarming circuit and control circuit power supply VCC, described pressure transducer is connected with the input end of voltage amplifier circuit, this voltage amplifier circuit output terminal is connected with relay switch, the output termination sound light alarming circuit of described relay switch; Described control circuit power supply VCC is that whole system is powered.
2. a kind of burglary prevention of laptop warning system based on pressure transducer according to claim 1, it is characterized in that: described voltage amplifier circuit comprises triode VT1, resistance R1, R2, R3, R4, R5, R6, R7, slide rheostat RP, electric capacity C1, C2, C3; One end of pressure transducer is connected with the base stage of triode VT1 through resistance R1, electric capacity C1, the base stage of triode VT1 is also connected with one end of resistance R2, resistance R3 respectively, the other end of resistance R2 is connected with one end of slide rheostat RP, the collector of triode VT1 is connected with one end of resistance R4, electric capacity C3 respectively, and the other end of slide rheostat RP, resistance R4 is all connected with control circuit power supply VCC; The other end of electric capacity C3 is then connected with relay K, and the two ends of relay K are parallel with resistance R7; The emitter of triode VT1 is connected with resistance R6 through resistance R5, and the two ends of resistance R6 are parallel with electric capacity C2; The equal ground connection of the other end of described pressure transducer, resistance R3, resistance R6, relay K.
3. a kind of burglary prevention of laptop warning system based on pressure transducer according to claim 1 and 2, is characterized in that: described sound light alarming circuit comprises triode VT2, VT3, resistance R8, R9, R10, R11, electric capacity C4, C5, diode D1, light emitting diode D2, loudspeaker SP; Control circuit power supply VCC is connected with the collector of resistance R8, resistance R9, triode VT3 respectively, and resistance R8 connects with diode D1, relay normally closed switch S; Resistance R9 is connected with resistance R10, the other end of relay normally closed switch S, the negative pole of loudspeaker SP respectively, the other end of resistance R10 is connected with the base stage of triode VT2, the collector of triode VT2 is connected with the base stage of triode VT3 through resistance R11, and the emitter of triode VT3 is then connected with the positive pole of loudspeaker SP through light emitting diode D2; The emitter of triode VT2 is also connected with the other end of relay normally closed switch S; Described electric capacity C4 one end is connected with resistance R10, and the other end and relay normally closed switch S-phase connect; Described electric capacity C5 one end is connected with the base stage of triode VT2, and the other end is connected with the emitter of triode VT3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520845319.4U CN205050274U (en) | 2015-10-27 | 2015-10-27 | Notebook theftproof alarm system based on pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520845319.4U CN205050274U (en) | 2015-10-27 | 2015-10-27 | Notebook theftproof alarm system based on pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205050274U true CN205050274U (en) | 2016-02-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520845319.4U Expired - Fee Related CN205050274U (en) | 2015-10-27 | 2015-10-27 | Notebook theftproof alarm system based on pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205050274U (en) |
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2015
- 2015-10-27 CN CN201520845319.4U patent/CN205050274U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20161027 |
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| CF01 | Termination of patent right due to non-payment of annual fee |