CN2471040Y - Mobile phone lost alarm device - Google Patents

Mobile phone lost alarm device Download PDF

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Publication number
CN2471040Y
CN2471040Y CN00226943U CN00226943U CN2471040Y CN 2471040 Y CN2471040 Y CN 2471040Y CN 00226943 U CN00226943 U CN 00226943U CN 00226943 U CN00226943 U CN 00226943U CN 2471040 Y CN2471040 Y CN 2471040Y
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China
Prior art keywords
triode
electromagnetic wave
mobile phone
lost
capacitor
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Expired - Fee Related
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CN00226943U
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Chinese (zh)
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张军
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Individual
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Individual
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Priority to CN00226943U priority Critical patent/CN2471040Y/en
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Publication of CN2471040Y publication Critical patent/CN2471040Y/en
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Abstract

The utility model relates to a mobile phone annunciator for loss or theft and consists of an electromagnetic wave transmission circuit preventing a mobile phone from loss and a signal generation device preventing signals from loss. The equipment is set inside the mobile phone and the owner of the mobile phone carries with it. When the mobile phone is in some distance from the loss prevention signal generation device, the L<1> and C<3> surge circuit in the electromagnetic wave loss prevention transmission circuit will transmit electromagnetic wave. If the antenna TX<2> in the loss prevention signal generation device can not receive electromagnetic wave or can only receive weak wave, the IC<2> music integration block will be triggered, the signals are amplified via the audion Q<4>, and the sound generator SP will give alarming sound.

Description

Mobile phone is lost alarm
The utility model relates to that a kind of mobile phone is lost or stolen warning device, is by anti-lost, the antitheft electromagnetic wave radiating circuit of mobile phone, anti-lost or alarm that stolen signal generation apparatus is formed.
At present, the SIM card of mobile phone is provided with the PIN PIN, and the antitheft function of using is arranged.At every turn, the password of must input before using setting, if import incorrect then can't use, but when mobile phone is being lost or be stolen, it can not send alarm signal, and, before extracting at every turn, must import password, increase service routine, bring some inconveniences.
The purpose of this utility model provides a kind of mobile phone and loses warning device, should be able to send alarm signal automatically when mobile phone is lost or be stolen.
The purpose of this utility model is to realize like this; Be provided with one and prevent losing special-purpose electromagnetic wave radiating circuit in mobile phone, transmitting range is set arbitrarily in 20 meters.Outside mobile phone, be provided with one by the mobile phone carrier anti-lost signal generation apparatus that carries next to the shin, when anti-lost signal generation apparatus is within above-mentioned transmitting range, can receive electromagnetic wave signal, electromagnetic wave signal control its internal circuit is not sent alarm signal (illustrating that mobile phone is very near from the people).When alarm and mobile phone were outside transmitting range, anti-lost signal generation apparatus received that electromagnetic wave signal is very weak or can not receive, and the internal circuit of anti-lost signal generation apparatus just sends alarm signal (illustrate mobile phone is about to lose or stolen) automatically.
Because, be provided with mobile phone and lose alarm, when mobile phone left its carrier's certain distance, alarm sent alarm signal, and promptly mobile phone is being lost or is stolen, and its carrier can learn that mobile phone will be lost or be stolen, so, in time take measures, give mobile phone for change.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is an anti-lost electromagnetic wave radiating circuit schematic diagram of the present utility model.
Fig. 2 is the anti-lost signal generation apparatus circuit theory diagrams of mobile phone.
The circuit of Fig. 1 is anti-lost electromagnetic wave radiating circuit, is arranged in the mobile phone shell power supply E 1Positive pole meets switch AN 1, power supply E 1Minus earth, capacitor C 4With switch AN 1The other end links to each other, capacitor C 4Other end earth connection.Capacitor C 4With switch AN 1Contact and coil L 1Centre tap connects.Coil L 1, L 2Mutually around forming mutual inductor together, coil L 2With antenna TX 1Connect other end earth connection.Coil L 1With variable capacitance C 3Form L 1, C 3Oscillating circuit.Its frequency of oscillation is by L 1, C 3Decision.Coil L 1Two ends and variable capacitance C 3Two ends connect respectively, the termination triode Q after it connects 1Collector electrode, another termination triode Q 2Collector electrode.Capacitor C 1, resistance R 1With triode Q 2Capacitor C 2, resistance R 2With triode Q 1The common L that forms 1, C 3The energized circuit of oscillating circuit.Capacitor C 1, resistance R 1Parallel connection, a termination triode Q 1Collector electrode and coil L 1Between contact, another termination triode Q 2Base stage, triode Q 2Grounded emitter.Capacitor C 2With resistance R 2Parallel connection, a termination triode Q 2Collector electrode and coil L 1Between contact, another termination triode Q 1Base stage.Triode Q 1Grounded emitter.
In the circuit of Fig. 1, coil L 1With coil L 2Select the same parameter.Variable capacitance C 3With variable capacitance C 7Be worth identically, form coil L 1, variable capacitance C 3, frequency of oscillation and inductance coil L 3, capacitor C 6, variable capacitance C 7The same frequency in loop.
As Closing Switch AN 1The time, because the effect of inductance makes power supply give capacitor C 3Charging, suppose originally charging current by a point through the b point to capacitor C 3Charging raises b point current potential gradually, and b point current potential passes through capacitor C 1Triode Q is given in coupling 2Base stage, make triode Q 2Conducting.As triode Q 2During conducting, coil L 1Sense of current counter-rotating, simultaneously, power supply by a point through the c point to capacitor C 3Charging raises c point current potential gradually; Simultaneously, b point current potential reduces gradually, as the timing of c point potential rise to, triode Q 1Conducting; When b point potential drop is low to moderate certain value, triode Q 2End, so circulation makes L 1, C 3The oscillating circuit vibration is more than, constantly the transmitting radio magnetic wave.
The circuit of Fig. 2 is anti-lost signal generation apparatus circuit theory diagrams, and anti-lost signal generation apparatus is arranged on outside the mobile phone, with mobile phone without any being connected, carry by the mobile phone carrier is next to the shin.
In Fig. 2 in the circuit, antenna TX 2, capacitor C 5Be composed in series reception antenna, variable capacitance C 7With capacitor C 6Series connection back one termination capacitor C 5Other end earth connection.Coil L 3One end ground connection, the other end is connected on capacitor C 5, C 6Between contact, coil L 3, L 4Form mutual inductor, coil L 4One terminating diode D 1Positive pole, another termination capacitor C 8, capacitor C 8Other end ground connection, diode D 1, D 2Form voltage doubling rectifing circuit, negative pole meets triode Q 3Base stage, diode D 2Plus earth is as antenna TX 2When receiving the signal with the oscillating circuit same frequency, coils L 4, diode D 1, D 2The output certain voltage makes triode Q 3Conducting.When can not receive the electromagnetic wave of same frequency, diode D 1, D 2Negative contacts does not have voltage output, triode Q 3Not conducting.
In the circuit of Fig. 2: power supply E 2, switch AN 2, variable resistor R 3, triode Q 3, diode D 3Constitute a loop, switch AN 2One termination power positive pole, another termination variable resistor R 3, variable resistor R 3Another termination triode Q 3Collector electrode, diode D 3Positive pole meets triode Q 3Emitter, negative pole connection circuit ground wire.
In the circuit of Fig. 2: power supply E 2, switch AN 2, acoustical generator SP, triode Q 4Constitute a loop, acoustical generator SP one termination variable resistor R 3With switch AN 2Between contact.Another termination triode Q 4Collector electrode.Triode Q 4The grounded emitter line.
IC 2Music-integrating block has 3 pin, and 1 pin meets triode Q 3With variable resistor R 3Between contact.As triode Q 3During not conducting, IC 2Music-integrating block 1 pin high level, IC 2Music-integrating block work.IC 2Music-integrating block 2 pin have signal output.Its 2 pin and triode Q 4Base stage connects.IC 2Music-integrating block 3 pin earth connections.Triode Q 4Rise and amplify IC 2The effect of music-integrating block signal is sounded acoustical generator SP.When the triode conducting, IC 2Music-integrating block 1 pin does not have voltage, IC 2Music-integrating block is not worked, and acoustical generator SP is sounding not.
When mobile phone and anti-lost signal generation apparatus in the design code distance, antenna TX 2Can receive antenna TX 1The electromagnetic wave that sends, the signal coils L that receives 3Be coupled to coil L 4Through diode D 1, D 2The voltage doubling rectifing circuit of being formed is with coil L 4Induced signal carry out voltage multiplying rectifier, its output signal makes triode Q 3Saturation conduction makes IC 2Music-integrating block 1 pin step-down level, IC 2Music-integrating block can not be worked, and acoustical generator SP is sounding not.When mobile phone and anti-lost signal generation apparatus are outside the design code distance, antenna TX 2Can not receive antenna TX 1Electromagnetic wave that sends or the electromagnetic wave signal of receiving are very weak, coil L 3With coil L 4The signal of coupling is through diode D 1, D 2The signal of output of voltage doubling rectifing circuit can not make triode Q 3Saturation conduction.At this moment, power supply E 2Voltage through resistance R 3Be added in IC 2Music-integrating block 1 pin.Make IC 2Music-integrating block is triggered, and its outputting music signal is through triode Q 4Amplify, make generator SP send alarm signal.
In the circuit of Fig. 1: coil L 1, L 2, capacitor C 1=C 2, variable capacitance C 3, triode Q 1=Q 2, resistance R 1=R 2Parameter value, determine the transmitting range of anti-lost electromagnetic wave radiating circuit, in exemplary embodiments: when the transmitting range of anti-lost electromagnetic wave radiating circuit is 15 meters, capacitor C 1, C 2Select 56P, resistance R 1, R 2Select 62K, triode Q 1, Q 2Select 3DG12, variable capacitance C 3Select 5/20P, coil L 1Select for use diameter 1mm enamelled wire flat around 10 circles on the pole of diameter 10mm, spacing 1.5mm, coil L 2Select for use same enamelled wire around 5 circles, power supply E 1Adopt direct current 5V,
In the circuit of Fig. 2: diode D under typical applicable cases 1, D 2, D 3Selecting identical model for use is 2AP, triode Q 3Be 3DK 4, triode Q 4Be 3DG12, acoustical generator SP8 ohm, capacitor C 5Be 33P, capacitor C 6Be 12P, variable capacitance C 7Be 5/20P, capacitor C 8Be 0.01u, power supply E25V, coil L 3With diameter 1.2mm enamelled wire around 10 circles.

Claims (1)

  1. A kind of mobile phone is lost alarm, is by anti-lost electromagnetic wave radio road, and anti-lost signal generation apparatus is formed, and is preventing that mobile phone from losing in the electromagnetic wave radiating circuit coil L 1With variable capacitance C 3Parallel connection, two tip node b, c are connected on triode Q respectively 1, Q 2Collector electrode between, switch AN 1Be connected on positive source and coil L 1Between the centre tap, coil L 1, variable capacitance C 3Constitute L 1, C 3Oscillating circuit, its electromagnetic wave coils L 2Induction is by antenna TX 1Launch capacitor C 1, resistance R 1, triode Q 2, capacitor C 2, resistance R 2, triode Q 1Form L 1, C 3The exciting circuit of oscillating circuit, capacitor C 1, resistance R 1In parallel one terminates at triode Q 1Between collector electrode and the b point, another termination triode Q 2Base stage, capacitor C 2, resistance R 2In parallel one terminates at triode Q 2Collector electrode and coil L 1Between contact, another termination triode Q 1Base stage, Closing Switch AN 1, L 1, C 3Oscillating circuit generates electromagnetic waves through antenna TX 1Launch, in the circuit of anti-lost signal generation apparatus, antenna TX 2, capacitor C 5, C 6, variable capacitance C 7Be linked in sequence variable capacitance C 7One end ground connection, coil L 3One terminates at capacitor C 5, C 6Between contact, other end earth connection, antenna TX 2, capacitor C 5, C 6, C 7, coil L 3Form the electromagnetic wave receiving circuit, coil L 3, L 4Form mutual inductor, coil L 4, diode D 1, D 2Constitute the voltage multiplying rectifier electric current, diode D 1, D 2Negative pole links to each other, its contact and triode Q 3Base stage connects.Diode D 1Positive pole, coil L 4, capacitor C 8Be linked in sequence capacitor C 8One end ground connection, diode D 2Plus earth, switch AN 2, triode Q 3, Q 4Variable resistor R 3, IC 2Music-integrating block, acoustical generator SP constitute warning circuit signal generation branch, triode Q 3Base signal decision triode Q 3Collector terminal voltage and IC 2The operating state of music-integrating block, triode Q 4Amplify IC 2The music-integrating block signal makes acoustical generator SP sounding, and positive source connects switch AN 2One end, variable resistor R 3Be connected across triode Q 3Collector electrode and switch AN 2Between, diode Q 3Positive pole meets triode Q 3Emitter, minus earth, IC 2Music-integrating block 1 pin and triode Q 3, variable resistor R 3Between contact connect 2 pin and triode Q 4Base stage connects, 3 pin earth connections, triode Q 4Collector electrode is connected with acoustical generator SP one end, grounded emitter, and the acoustical generator SP other end is connected on variable resistor R 3, switch AN 2Between, when the distance of anti-lost electromagnetic wave radiating circuit and anti-lost signal generation apparatus is within the transmitting range of anti-lost electromagnetic wave radiating circuit, antenna TX 2Receive antenna TX 1The emission the same frequency electromagnetic wave time, triode Q 3Conducting, IC 2Music-integrating block is not triggered, and acoustical generator can not send alarm sound, when the distance of anti-lost electromagnetic wave radiating circuit and anti-lost signal generation apparatus is outside the transmitting range of anti-lost electromagnetic wave radiating circuit, and antenna TX 2Can not receive antenna TX 1The emission same frequency electric wave or receive very weak, triode Q 3Not conducting, triode Q 3The voltage of collector electrode and variable resistor contact rises, IC 2Music-integrating block, triode Q 4Work, acoustical generator sends alarm sound, it is characterized in that: an anti-lost signal generation apparatus is set outside mobile phone, is not connected with mobile phone, anti-lost electromagnetic wave radiating circuit is arranged within the mobile phone.
CN00226943U 2000-11-01 2000-11-01 Mobile phone lost alarm device Expired - Fee Related CN2471040Y (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100349489C (en) * 2004-08-23 2007-11-14 英华达（南京）科技有限公司 System for preventing mobile telephone from unauthorized use
US8044813B1 (en) 2006-11-16 2011-10-25 Semiconductor Energy Laboratory Co., Ltd. Radio field intensity measurement device, and radio field intensity detector and game console using the same
CN102682555A (en) * 2012-05-21 2012-09-19 南昌大学 Mobile telephone anti-theft alarm based on electromagnetic wave Doppler effect
CN101222558B (en) * 2007-01-13 2012-12-05 海尔集团公司 Mobile phone with secret protection function and its method
TWI415037B (en) * 2008-05-09 2013-11-11 Chi Mei Comm Systems Inc System and method for monitoring whether a handheld device is lost
CN104781859A (en) * 2014-05-31 2015-07-15 杨顺伟 Portable multifunctional electronic device
WO2015180208A1 (en) * 2014-05-31 2015-12-03 杨顺伟 Portable multifunctional electronic apparatus
CN105898011A (en) * 2015-10-26 2016-08-24 乐视致新电子科技（天津）有限公司 Hardware cipher-based mobile phone data protection method and device
CN109151645A (en) * 2018-09-26 2019-01-04 广东全过程工程咨询有限公司 The wireless telecom equipment of variable device

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100349489C (en) * 2004-08-23 2007-11-14 英华达（南京）科技有限公司 System for preventing mobile telephone from unauthorized use
US10215788B2 (en) 2006-11-16 2019-02-26 Semiconductor Energy Laboratory Co., Ltd. Radio field intensity measurement device, and radio field intensity detector and game console using the same
US8044813B1 (en) 2006-11-16 2011-10-25 Semiconductor Energy Laboratory Co., Ltd. Radio field intensity measurement device, and radio field intensity detector and game console using the same
CN101183127B (en) * 2006-11-16 2011-12-14 株式会社半导体能源研究所 Electric wave intensity measuring device, electric wave intensity detector and game equipment
US8188875B2 (en) 2006-11-16 2012-05-29 Semiconductor Energy Laboratory Co., Ltd. Radio field intensity measurement device, and radio field intensity detector and game console using the same
US8330607B2 (en) 2006-11-16 2012-12-11 Semiconductor Energy Laboratory Co., Ltd. Radio field intensity measurement device, and radio field intensity detector and game console using the same
US11656258B2 (en) 2006-11-16 2023-05-23 Semiconductor Energy Laboratory Co., Ltd. Radio field intensity measurement device, and radio field intensity detector and game console using the same
US11061058B2 (en) 2006-11-16 2021-07-13 Semiconductor Energy Laboratory Co., Ltd. Radio field intensity measurement device, and radio field intensity detector and game console using the same
US10634708B2 (en) 2006-11-16 2020-04-28 Semiconductor Energy Laboratory Co., Ltd. Radio field intensity measurement device, and radio field intensity detector and game console using the same
CN101222558B (en) * 2007-01-13 2012-12-05 海尔集团公司 Mobile phone with secret protection function and its method
TWI415037B (en) * 2008-05-09 2013-11-11 Chi Mei Comm Systems Inc System and method for monitoring whether a handheld device is lost
CN102682555A (en) * 2012-05-21 2012-09-19 南昌大学 Mobile telephone anti-theft alarm based on electromagnetic wave Doppler effect
WO2015180208A1 (en) * 2014-05-31 2015-12-03 杨顺伟 Portable multifunctional electronic apparatus
CN104781859A (en) * 2014-05-31 2015-07-15 杨顺伟 Portable multifunctional electronic device
CN105898011A (en) * 2015-10-26 2016-08-24 乐视致新电子科技（天津）有限公司 Hardware cipher-based mobile phone data protection method and device
CN109151645A (en) * 2018-09-26 2019-01-04 广东全过程工程咨询有限公司 The wireless telecom equipment of variable device

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GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee