CN101059904A - A mobile communication network-based intelligent anti-theft alarm device - Google Patents

Abstract

The invention provides a novel intelligent anti-theft method, for improving the anti-theft alarm function of notebook computer. When user leaves notebook computer, the invention can be fixed on an anti-theft lock hole of the notebook computer, and turns on a power switch, therefore, user can use mobile phone to set the anti-theft device into anti-theft alarm state. And when release the anti-theft state, user should input preset password. When someone touches the notebook computer in the anti-theft alarm state, an accelerator sensor can pickup abnormal state, an intelligent control module drives an alarm module to alarm, and controls a wireless module to dial the user mobile phone or send message via GSM network. The invention uses battery, while the battery box is fixed via screw, to avoid power supply being taken off in short time.

Description

A kind of intelligent anti-theft alarm device based on mobile communications network

Technical field

The present invention relates to a kind of novel intelligent anti-theft alarm device, be particularly useful for the antitheft of notebook computer.

Background technology

At present, a large amount of uses of notebook computer, the requirement higher to antitheft proposition.According to statistics, the whole world has 300,000 notebooks stolen every year approximately, and every stolen average loss of notebook reaches 86920 dollars.Traditional theft preventing method is a lot, mainly comprises antitheft firmly, the soft antitheft and antitheft comprehensive method of soft or hard.

The notebook theftproof lock is a kind of hard theft preventing method commonly used.Usually all can have one on the notebook computer and be called as the antitheft lockhole of " Security Slot (safe interface) ", there is a lock shape sign on the next door.Notebook computer antitheft lock commonly used has cable lock and button to lock two kinds: wherein cable lock as shown in Figure 1.During use one end be fixed on hard and the object that is difficult to move (as the bed frame in the bedroom) on, again the T type tapered end of the other end is inserted the antitheft lockhole of computer, half-twist just can pin whole computer; The button lock is then based on sound and light alarm, and its inside is provided with Shock inductor, during use the steel snap close is injected antitheft lockhole and pins computer (or computer package), and it will send audible and visible alarm when surpassing the action threshold value of setting, and frightens or help to arrest the thief away.

The notebook person of giving for change of Toshiba (Laptop Retriever) software is typical soft burglary-resisting system.Its cardinal principle is that notebook can be regularly and the position of server contact with definite present place of notebook.After if owner reports that notebook is stolen, the technician of the said firm will join together to look for stolen notebook with the police unit of locality.

A theft-protective notebook that typical software and hardware comprehensive theft system such as Founder have just been released.Temporary transient or short distance is left notebook and is carried notebook the antitheft button that can press on the fuselage when going out and starts anti-theft feature as people.Owner's certain limit around is interior movable, moves notebook if any the people, and notebook can send the tweeting sound of similar car alarm system, the password of screen prompt input simultaneously, correctly input password after, anti-theft alarm is removed, and at this moment, any orders such as shutdown all can not be sounded all clear.

The present invention proposes a kind of novel intelligent anti-theft product, can be used for the antitheft of notebook computer.In addition, this anti-theft product can be applied in the occasions such as automobile, family fire be antitheft simultaneously.Compare with traditional anti-theft device, this invention has characteristics such as highly versatile, intelligence, cheapness, applied range.

Summary of the invention

Technical matters to be solved by this invention is to provide a kind of antitheft scheme of novel intelligence, is particularly suitable for improving the anti-theft alarm function of notebook computer.

To achieve these goals, the invention provides a kind of burglar alarm, its characteristics are that this burglar alarm comprises an acceleration sensor module, an intelligent control module, an alarm module, a power module and a wireless module.

In the above-mentioned burglar alarm, its characteristics further are, its acceleration sensor module is used for the sense accelerations change information and exports induced voltage signal; Its intelligent control module links to each other with this acceleration sensor module, receives this output induced voltage signal, and whether judgement is in abnormality; Its alarm module links to each other with intelligent control module, after the intelligent control module check is unusual, and its output alarm signal, and the driving related circuit carries out alarm indication.

Above-mentioned burglar alarm, its characteristics are that further above-mentioned wireless module comprises again: a gsm module is used to insert the GSM net; One SIM card module is used for information such as memory device number; One Anneta module is used for sending and receiving the GSM signal.

Above-mentioned burglar alarm, its characteristics are that further when acceleration sensor module induction abnormal information, intelligent control module will drive alarm module and carry out this locality warning, and the control wireless module sends note or telephone call by the GSM network to owner.

Above-mentioned burglar alarm, its characteristics further are, can pass through user mobile phone opening/closing anti-theft switch, thereby make it be in anti-theft state/releasing anti-theft state.

Above-mentioned burglar alarm, its characteristics are that further it is powered by battery.

Above-mentioned burglar alarm, its characteristics are that further its battery case adopts set screw to reinforce, and are difficult to take out battery at short notice.

Above-mentioned burglar alarm, its characteristics are that further this electric alarm device can be electric sound-producing device, light warning device, acousto-optic combinde alarms device or electromagnetism warning device.

Above-mentioned burglar alarm, its characteristics are that further acceleration sensor module can change temperature sensor, pressure transducer, vibration transducer etc. into.Such as adopt temperature sensor to can be used for indoor fire safety warning etc.

Above-mentioned burglar alarm, its characteristics are that further wireless module not only is confined to gsm module, it can be replaced with the module that CDMA module, PHS module etc. are used for mobile radio communication.

Effect of the present invention has been to provide a kind of theft preventing method of novel intelligence, can be used for improving the antitheft and indoor fire safety alarm of notebook computer, automobile etc.

Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.

Description of drawings

The antitheft cable lock of the common notebook of Fig. 1

Fig. 2 system principle diagram

Fig. 3 Single Chip Microcomputer (SCM) system software flow pattern

Fig. 4 MMA6260 encapsulation

Fig. 5 TC35 module pin figure

Fig. 6 MSP430F149 encapsulates figure

Fig. 7 sensor assembly is connected with intelligent control module

The software workflow of Fig. 8 acceleration collecting part

Fig. 9 TC35 module and MSP430F149 catenation principle figure

Figure 10 wireless transmitter module software flow pattern

The local alarm module of Figure 11 is connected with intelligent control module

Figure 12 MAX1951 Voltage stabilizing module catenation principle figure

Figure 13 MAX882 Voltage stabilizing module catenation principle figure

Figure 14 intelligent anti-theft system schematic diagram

Embodiment

This invention comprises acceleration sensor module, intelligent control module, alarm module, power module and wireless module.When the notebook user leaves notebook, this invention can be fixed on the antitheft lockhole of its notebook, and open switch.At this moment, the user can be made as the burglar alarm state with this anti-theft device by mobile phone.If remove anti-theft state, the password that needs input to configure.When the burglar alarm state, if someone touches notebook computer, the acceleration transducer of this invention will be caught abnormality, under the control of intelligent control module, drive alarm module and carry out this locality warning, control wireless module simultaneously, wireless module will be put through user's mobile phone by the GSM network this moment, remind the user and will realize the purpose that notebook is antitheft thereby reach.

The power module of this invention adopts powered battery, and battery case is located with screw-socket, makes stealer be difficult to take out power supply from this invention in the very short time.

The structured flowchart of total system as shown in Figure 2.The principle of work of acceleration transducer is that acceleration signal is converted into the output aanalogvoltage.The output aanalogvoltage is by A/D (digital-to-analog conversion) back input intelligent control module.Intelligent control module can adopt DSP (digital signal processor), ARM (Advanced RISC Machines) or singlechip chip and peripheral circuit thereof to constitute.Adopting MMA6260 chip, intelligent control module to adopt the MSP430F149 single-chip microcomputer with acceleration sensor module below is example, carries out feasibility analysis.

Acceleration transducer and one-chip machine common 3.3V power supply, according to the acceleration transducer characteristic, output voltage range is 0.25V～3.05V, output voltage enters the Chip Microcomputer A passage and carries out analog to digital conversion.The inner ADC of single-chip microcomputer needs a reference signal, is generally voltage reference, and the numeral output expression analog input of ADC is with respect to the ratio of its benchmark.If N _ADCBe the numeral output of ADC, V _R+, V _R-Be reference voltage, then have:

$N_{\mathrm{ADC}}=4095\×\frac{V_{\mathrm{in}}-V_{R-}}{V_{R+}-V_{R-}}$

V among the present invention _R+Be made as V _CC, V _R-Be made as V _SSSo, when it when directions X does not have acceleration, output voltage should be 1.65V, and institute's total should be 1000,0000,0000 behind the Chip Microcomputer A C.

If the numeral that directions X transforms is output as N _X, the numeral that the Y direction transforms is output as N _Y, minimum warning acceleration equivalence numeral is output as N _Th, then have:

N in the formula _ThCan set by repeatedly testing.N _ThExcessive, then do not have antitheft effect; N _ThToo small, then false-alarm probability is bigger.

AD resolution is 12, and according to MSP430F149 Chip Microcomputer A/D conversion characteristic as can be known, it has the 2bit transformed error, promptly ± and 2LSB.So conversion accuracy is:

(3.3/4096)×4＝3.2mV

The sensitivity of MMA6260 is 800mV/g, so theoretical precision is:

3.2mV/(800mV/g)＝0.004g。

As seen the theft-prevention applications requirement is satisfied in the sensitivity of this invention.

Alarm module adopts hummer, also can adopt the electric alarm device of other form, as: light warning device, acousto-optic combinde alarms device or electromagnetism warning device.

Wireless module comprises radio transmitting and receiving chip and peripheral circuit, SIM card module and Anneta module.Radio transmitting and receiving chip can adopt the highly integrated GSM SMS module of double frequency 900/1800MHZ based on the GSM network.Wireless module communicates by RS-232 mouth and intelligent control module.

The software workflow figure of Based Intelligent Control control module as shown in Figure 3.Wherein intelligent control module adopts the MSP430F149 chip, and acceleration transducer adopts the MMQ6260 chip, and wireless module adopts the TC35i module.

Power module adopts battery to power, and can adopt rechargeable batteries such as ni-mh, NI-G.Because wireless module is generally higher to power requirement, such as peak point current is 1.8A, supply voltage pressure drop this moment is less than 400mV simultaneously.So power module generally should comprise special power conversion chip.

Below the implementation of each module is discussed in detail.

1. sensor assembly

Sensor assembly adopts the MMA6260 chip of motorola inc.This chip is the low-cost single chip twin shaft sensor that U.S. motorola inc releases, based on the surface micro structure, and integrated signal processing circuit, single pole and low pass wave filter and temperature compensation, integrated outside self check means detection system functional completeness simultaneously.

Its functional characteristics is:

Measurement range: twin shaft, ± 1.5g;

High sensitivity: 800mV/g;

Low-power consumption: 1.2mA;

Single power supply :+2.7V～+ 3.3V;

Ultra-small volume: 6mm * 6mm * 1.98mm (QFN encapsulation);

High linear output: nonlinearity is lower than 1%;

Firm in structure: as can to bear ± the 2000g impact;

ESD electrostatic protection: built-in 2000V ESD electrostatic discharge protective circuit.

Its package pins as shown in Figure 4.

Its pin is described as follows:

NC: unsettled;

Y-OUT:Y is to the acceleration output voltage;

X-OUT:X is to the acceleration output voltage;

Vdd: power end;

Vss: ground end;

ST: self calibration

2. wireless module

Wireless module adopts the TC35 SMS module and the Anneta module of SIMENS company.This SMS module is the highly integrated GSM SMS module of a double frequency 900/1800MHZ, and its fundamental characteristics is as follows:

Volume is little, in light weight

Low-power consumption

Support data, voice, short message and fax

The SIM application toolkit

AT Command Set control

R﹠amp; TTE authentication, GCF authentication

The SMS:MT/MO/CB/Text/PDU pattern

Audio frequency: flank speed, upgrading flank speed and half rate

Be convenient to integrated

TC35/TC35I SMS module electrical specification

Support voltage range: 3.3 to 5.5V

Current drain:

TALK pattern: peak at EGSM 900/GSM 1800:1.8A;

TALK pattern: at EGSM 900/GSM 1800:300mA/270mA;

IDLE pattern: at EGSM 900/GSM 1800:10mA/10mA;

SLEEP pattern: 3mA;

Power Down pattern: 50uA.

TC35/TC35I SMS module output power

-2W-classification 4, for EGSM 900

-1W-classification 1, for GSM 1800

TC35/TC35I SMS module mechanical property

Size: 54.5 * 36 * 6.75mm

Weight: 18g

Environment temperature :-20 ℃ to+55 ℃ (GSM 11.10 standards)

Data characteristics: the CSD maximum reaches 14.4kbps, USSD, opaque pattern

Decoded mode: CS 1,2,3,4

TC35/TC35I SMS module interface

40 pin connect:

-power interface

-SIM 3V interface

-standard RS232 bidirectional interface: level is CMOS 2.65V, optional baud rate

-analog voice interface 0

50 ohm antenna connectors

Its module pin as shown in Figure 5.

Its pin definitions sees the technical documentation TC35_37_HD_02_V03.10.pdf of SIMENS company for details

3. intelligent control module

Intelligent control module adopts the MSP430 series monolithic of TI company.This single-chip microcomputer mainly has following characteristics:

Low suppling voltage: 1.8V～3.6V

Utmost point low power consumption:

Normal mode of operation: 616 ^{μ W}@1MHz, 2.2V

Standby mode: 6 ^{μ W}

Park mode: less than 1 ^{μ W}

From the holding state activationary time less than 6 ^{μ S}

12 A/D change-over circuits have the internal reference power supply, and sampling keeps and the autoscan characteristics

60KB+256B Flash storer

2KB RAM storer

Its package pins as shown in Figure 6.

Its pin definitions sees the technical documentation of the MSP430 of TI company series monolithic for details.

3.1 sensor assembly is connected with the intelligent control module module

The connection layout of sensor assembly and intelligent control module module as shown in Figure 7.

Fig. 8 has shown the software workflow of acceleration collecting part on the single-chip microcomputer.

3.2TC35 module is connected with intelligent control module

The catenation principle figure of TC35 module and intelligent control module as shown in Figure 9.

Mainly using following TC35 interface: RS-232 is responsible for and single chip communication; IGT links to each other with single-chip microcomputer, to utilize the startup of Single-chip Controlling TC35; Power supply links to each other with power module with the ground end, and the output of SYNC end is to show the TC35 duty; The SIM card pin links to each other with SIM card.

Below the TC35 main modular is analyzed.

Power module: TC35 is higher to power requirement, and it is 1.8A that peak point current need be provided, and simultaneously supply voltage can not be therefore and more than the decline 400mV.The power supply that TC35 needs provides by special power conversion chip.

The SIM card module: corresponding one by one with the SIM card connection, but should notice that the joint current length between ZIF connector and the card pin can not surpass 200mm, to satisfy the GSM11.10 standard.

RS-232 interface: UART1 works in the UART pattern among the MSP430F149, is connected with the RS-232 interface of TC35i.

Here to illustrate that DTR0 is connected with the DSR0 pin, because therefore the validity of its expression single-chip microcomputer and wireless module can be changed to them effectively always.

The SYNC pin function is to detect the TC35 duty: two kinds of mode of operations are arranged, can instruct AT+SYNC to be provided with by AT.A kind of indication emissive power growth pattern, the another kind of TC35i duty that shows.In the present invention SYNC is received LED and show, the meaning of the state representative of LED is as shown in the table:

Table 1 TC35 led status and meaning Led state The expression implication Go out always Shutdown, dormancy, charging 600ms is bright/and 600ms goes out Do not have SIM card, do not have PIN, seek network, subscription authentication 75ms is bright/and 3s goes out Enter network, entered the machine state of holding Bright always Voice or data are transmitted

The software flow pattern of wireless transmitter module as shown in figure 10 on the single-chip microcomputer.

3.3 local alarm module is connected with intelligent control module

Thereby MSP430F149 controls the break-make of local alarm module by the base stage of control triode.Local alarm module warning circuit adopts hummer, as shown in figure 11.

4. power module

The power unit principal feature is as follows:

Utilize MAX1951 voltage stabilizing chip to provide 4.2V burning voltage and peak value 2A electric current, to guarantee that TC35 works smoothly for the TC35 transmitter module;

Utilize MAX882 voltage stabilizing chip that supply voltage is changed, 3.3V exports, and the working power of single-chip microcomputer and sensor assembly is provided.

4.1MAX1951 Voltage stabilizing module

Wireless module TC35i is higher to power requirement, so its power module designs separately.The power supply design should be noted some:

Whenever I, external power source can not be lower than 3.3V, and voltage drop can not surpass 400mV in the process of burst transfer;

II, external power source can provide peak value 2A electric current;

If above-mentioned requirements can not reach, TC35i is with regard to cisco unity malfunction, and the mistake of voltage exceeds and lowly all can cause module to be shut down automatically (POWERDOWN), and the electric current that does not provide peak value 2A then can not be launched probably.

Based on above-mentioned consideration, adopted 1.5A PWM STEP-DOWN DC-to-DC Regulator:MAX1951. in the design

MAX1951 is high-level efficiency, DC-DC step-down switching converter, can export the output current up to 1.5A.This voltage stabilizer can produce the output voltage of 0.8V to VIN by the input voltage from 2.6V to 5.5V, is particularly suitable for the application that those need back voltage stabilizing on the plate.In whole load, circuit, temperature range, the total output error of MAX1951 is less than 1%.MAX1951 is operated in the steady job frequency of 1MHz, has the efficient up to 94%.Higher frequency of operation has reduced the size of outer member.Inner SS (soft start) control circuit has reduced surge current.Short circuit and thermal overload protection have improved the reliability of design.MAX1951 has adopted the 8 pin SO encapsulation of saving the space.Key characteristic has:

Compact 0.385in ²The circuit board size;

1.5A can select 10 μ F input, output ceramic condenser 2 μ H inductance during output for use;

Efficient is up to 94%;

In whole load, supply voltage and operating temperature range, can keep 1% output accuracy (MAX1951, output current 1.5A);

Guarantee the output current of 2A;

Work in 2.6V to 5.5V supply voltage;

0.8V to VIN scalable output (MAX1951);

The internal digital soft start;

Short circuit and thermal overload protection;

Its application circuit as shown in figure 12.

Each main element act as:

JP3, JP4, JP5: manually whether decision needs chip operation;

The COMP end: meet RC extremely to realize internal compensation, controlled by triode by single-chip microcomputer, COMP drags down and can make chip enter the SHUTDOWN pattern, and LX is high-impedance state;

R7, C20: to the VCC decoupling, to guarantee high switching frequency and output accuracy;

R8, R9:FB feed back output network, with regulated output voltage;

L3: outputting inductance; C18: input filter capacitor; The C20:VCC shunt capacitance;

C19: building-out capacitor; The C21:REF shunt capacitance; C22: output filter capacitor.

4.2MAX882 Voltage stabilizing module

MAX882 is low unstability voltage, low quiescent current linear voltage regulator, typical quiescent current 11uA (maximum 15uA).The unstability voltage of 5V is 220mV (output 200mA), and the unstability voltage of 3.3V is 320mV (output 200mA).Its main performance is:

Electric current restriction: output 200mA during TJ=125oC;

High power (1.5W) 8 pin SO encapsulation;

Dual-mode of operation: 3.3V output or the adjustable output of 1.25V to 11V;

2.7V to the 11.5V input voltage range;

Low unstability voltage 220mV (output 200mA);

Work quiescent current 11uA (representative value);

Turn-off quiescent current 1uA (maximal value), or standby quiescent current 7uA (representative value);

Undervoltage detector;

Reverse-current protection;

Thermal overload protection.

Its application circuit as shown in figure 13.

Each main element act as:

SET: output voltage is set, but the outer meeting resistance network is realized different outputs, uses default value 3.3V among the design;

OUT: voltage stabilizing output, output current maximal value 200mA, external 2.2UF shunt capacitance;

IN: power supply input;

STBY: standby, when connecing low level, output OUT turn-offs operate as normal when connecing high level;

LBI: when under-voltage detection, LBI input were lower than inner 1.2V reference voltage, open-drain LBO became low level, and the time spent does not meet IN.

More than be this detailed description of inventing each module and connection thereof, the basic circuit diagram of total system as shown in figure 14.

Another kind of embodiment of the present invention is that acceleration sensor module can adopt other sensor assembly, as temperature sensor, vibration transducer, pressure transducer etc.

Spirit of the present invention and essence are that the sensor alerting signal is passed through mobile portable phone or SMS notification user, realize reporting to the police.

Certainly; the present invention also has other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.

Claims (8)

1. the intelligent anti-theft alarm device based on mobile communications network (hereinafter to be referred as burglar alarm) is characterized in that: according to the sensor signal abnormal conditions that capture, send mobile phone or telephone call by mobile communications network to the user.

2. burglar alarm according to claim 1, its feature further is: this device comprises again:

One power module is used to this burglar alarm power supply;

One sensor assembly is used for the perception external environment and changes output voltage signal;

One alarm module under the control of intelligent control module, is used for local the warning;

One wireless module under the control of intelligent control module, is used for accessing mobile communication network, carries out radio communication;

One intelligent control module is used for the abnormal signal of detecting sensor module, and control wireless module and alarm module send alerting signal.

3. burglar alarm according to claim 2, its feature further is:

This power module comprises a battery component.This battery component comprises several batteries, battery case and external circuits.The battery of this battery component is general dry cell, rechargeable nickel-hydrogen battery, lithium battery and/or other batteries; The battery case of this battery component adopts set screw to reinforce, and makes stealer be difficult to take out in the short period of time battery.

4. burglar alarm according to claim 2, its feature further is:

Its sensor assembly comprises again:

One acceleration sensor chip is used for the sense accelerations change information and exports induced signal.This acceleration transducer is replaceable to be pressure transducer, and temperature sensor and/or other sensors are to realize the anti-theft feature of different occasions.

5. burglar alarm according to claim 2, its feature further is:

Its intelligent control module, with power module, sensor assembly, wireless module, alarm module links to each other, and the signal of receiving sensor module output is judged abnormal signal, and control warning module and wireless module are reported to the police.The control chip of this intelligent control module is a singlechip chip, DSP (digital signal processor) chip, ARM (Advanced RISC Machines) chip and/or other control chips.

6. burglar alarm according to claim 2, its feature further is:

Its alarm module under the control of intelligent control module, is exported local alerting signal.The hummer assembly of this alarm module is electric sound-producing device, light warning device, acousto-optic combinde alarms device or electromagnetism warning device.

7. burglar alarm according to claim 2, its feature further is:

This wireless module comprises: a transmitter module is used for the access mobile communication net; One SIM card module is used for information such as memory device number; One Anneta module is used for sending and receiving wireless signal.This transmitter module comprises gsm module, CDMA module, PHS module etc.

8. burglar alarm according to claim 2, its feature further is:

This device can be opened anti-theft switch by user mobile phone, thereby makes it be in anti-theft state/releasing anti-theft state;

When alarm module sends alerting signal, intelligent control module will be controlled wireless module and send note or telephone call by mobile communications network to owner.