CN105405230A - Wireless transmission intelligent antitheft system based on signal filtering amplification circuit - Google Patents
Wireless transmission intelligent antitheft system based on signal filtering amplification circuit Download PDFInfo
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- CN105405230A CN105405230A CN201510973918.9A CN201510973918A CN105405230A CN 105405230 A CN105405230 A CN 105405230A CN 201510973918 A CN201510973918 A CN 201510973918A CN 105405230 A CN105405230 A CN 105405230A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
- G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
- G08B13/1672—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using sonic detecting means, e.g. a microphone operating in the audio frequency range
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19634—Electrical details of the system, e.g. component blocks for carrying out specific functions
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a wireless transmission intelligent antitheft system based on a signal filtering amplification circuit. The system is mainly formed by a central processor, a first wireless signal transmission module, a second wireless signal transmission module, a PC, an image collector, a vibration sensor, a data storage device, a sound collector, a power supply, an alarm and an image signal automatic gain circuit, wherein the vibration sensor, the data storage device, the sound collector, the power supply and the alarm are connected with the central processor; and the image signal automatic gain circuit is serially connected between the image collector and the central processor. The antitheft system is characterized in that a signal filtering amplification circuit is also serially connected between the vibration sensor and the central processor. The antitheft system is capable of precisely recording images and sound during the stealing process, and precisely and effectively transmitting the stolen information to a user or the police immediately so as to ensure that the user will not lose property.
Description
Technical field
The present invention relates to the technical field of electronic equipment, specifically refer to a kind of intelligent anti-theft system of the wireless transmission based on signal filtering amplifying circuit.
Background technology
Existing safety cabinet is only limitted to sound and light alarm, does not well monitor for surrounding environment, when the stolen situation of generation safety cabinet, cannot record stolen process, and cannot obtain stolen information in the very first time, affect recovering and solving a case of safety cabinet.The warning function of present safety cabinet is only limitted to report to the police at acousto-optic-electric, and little to the warning message of user, user can not understand the situation at safety cabinet scene well, and the effect of warning is little, and the potential safety hazard of safety cabinet is still very large.
Summary of the invention
The burglary-resisting system that the object of the invention is to overcome safety cabinet of the prior art cannot record the defect of stolen process, the invention provides a kind of intelligent anti-theft system of the wireless transmission based on signal filtering amplifying circuit.
The present invention is achieved through the following technical solutions: a kind of intelligent anti-theft system of the wireless transmission based on signal filtering amplifying circuit, primarily of central processing unit, first wireless signal transmission module, second wireless signal transmission module, PC, image acquisition device, the vibration transducer be all connected with central processing unit, data-carrier store, sound collector, power supply and alarm, and be serially connected in the picture signal auto-gain circuit composition between image acquisition device and central processing unit; Meanwhile, between vibration transducer and central processing unit, signal filtering amplifying circuit is also serially connected with.
Described signal filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT4, triode VT5, negative pole is connected with the collector of triode VT4, positive pole is as the input end of signal filtering amplifying circuit and the polar capacitor C6 be connected with vibration transducer, N pole is connected with the base stage of triode VT4, the diode D6 that P pole is connected with the positive pole of polar capacitor C6 after resistance R13, negative pole is connected with the positive pole of amplifier P1, the polar capacitor C7 that positive pole is connected with the positive pole of polar capacitor C6 after resistance R14, positive pole is connected with the output terminal of amplifier P2 after resistance R19, the polar capacitor C9 that negative pole is connected with the base stage of triode VT4 after resistance R15, one end is connected with the emitter of triode VT4, the resistance R16 that the other end is connected with the positive pole of amplifier P2, P pole is connected with the output terminal of amplifier P1, the diode D7 that N pole is connected with the emitter of triode VT5 after resistance R18, positive pole is connected with the negative pole of amplifier P2, the polar capacitor C8 that negative pole is connected with the N pole of diode D7, and P pole is connected with the N pole of diode D7 after resistance R17, the diode D8 that N pole is connected with the emitter of triode VT5 after polar capacitor C10 forms, the minus earth of described amplifier P1, the output terminal of described amplifier P2 is connected with the base stage of triode VT5, the output terminal of this amplifier P2 as signal filtering amplifying circuit output terminal and be connected with central processing unit, the grounded collector of described triode VT5.
Described picture signal auto-gain circuit is then by the image signal conversion circuits be connected with image acquisition device, and the variable gain circuit be connected with image signal conversion circuits forms; The output terminal of described variable gain circuit is then connected with central processing unit.
Described image signal conversion circuits is by conversion chip U1, triode VT1, P pole is connected with the SOU pin of conversion chip U1 after resistance R2 through resistance R3 in turn, the diode D2 that N pole is connected with the DA pin of conversion chip U1 after resistance R6, positive pole is connected with the LN pin of conversion chip U1, the polar capacitor C1 that negative pole is connected as the input end of image signal conversion circuits and with image acquisition device after resistance R1, P pole is connected with the negative pole of polar capacitor C1, the diode D1 that N pole is connected with the base stage of triode VT1, positive pole is connected with the CS pin of conversion chip U1, negative pole is in turn through polar capacitor C2 that resistance R4 is connected with the CN pin of conversion chip U1 after resistance R5, and positive pole is connected with the SW pin of conversion chip U1, negative pole and the N of diode D2 extremely jointly form the output terminal of image signal conversion circuits and the polar capacitor C3 be connected with variable gain circuit forms, the DR pin of described conversion chip U1 is connected with the P pole of diode D2, the GND pin ground connection of this conversion chip U1, the negative pole of described polar capacitor C2 is connected with the emitter of triode VT1.
Described variable gain circuit is by triode VT2, triode VT3, field effect transistor MOS, P pole is connected with the N pole of diode D2 after resistance R7, the diode D4 that N pole is connected with the emitter of triode VT3 after resistance R12, positive pole is connected with the P pole of diode D4 after resistance R11, the polar capacitor C5 that negative pole is connected with the base stage of triode VT3, P pole is connected with the drain electrode of field effect transistor MOS after adjustable resistance R8, the diode D3 that N pole is connected with the base stage of triode VT2, one end is connected with the base stage of triode VT2, the resistance R9 that the other end is connected with the grid of field effect transistor MOS, positive pole is connected with the emitter of triode VT2, the polar capacitor C4 that negative pole is connected with the source electrode of field effect transistor MOS, and P pole is connected with the emitter of triode VT3, the diode D5 that N pole is connected with the source electrode of field effect transistor MOS after resistance R10 forms, the base stage of described triode VT2 is connected with the negative pole of polar capacitor C3, its grounded collector, the N pole of described diode D4 is connected with the drain electrode of field effect transistor MOS, the grounded collector of triode VT3, the N pole of described diode D5 as variable gain circuit output terminal and be connected with central processing unit.
For guaranteeing practical effect of the present invention, described image acquisition device preferentially adopts TR350 type infrared pick-up head to realize; And vibration transducer preferentially adopts BM7008 type vibration transducer to realize; Sound collector then preferentially adopts VCA-1008 type sound collector to realize simultaneously; And conversion chip U1 preferentially adopts AX2002 integrated chip to realize.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) signal filtering amplifying circuit of the present invention can suppress the undesired signal in the vibration signal of vibration transducer output or eliminate, and carried out amplifying rear output by the vibration signal after process, thus ensure that the vibration signal that vibration transducer exports can accurately be transferred to central processing unit.
(2) picture signal auto-gain circuit of the present invention can carry out anti-interference process to the image analoging signal collected that image acquisition device exports, eliminate the noise signal in this image analoging signal, image analoging signal is converted to viewdata signal simultaneously, gain can also be carried out to the low frequency signal in viewdata signal, guarantee that the frequency of the viewdata signal exported is consistent, thus ensure that the accuracy of intelligent anti-theft system to image acquisition of wireless transmission of the present invention.
(3) present invention employs vibration transducer, the stable performance of this vibration transducer, highly sensitive, the advantages such as low price.
Accompanying drawing explanation
Fig. 1 is one-piece construction figure of the present invention.
Fig. 2 is the electrical block diagram of picture signal auto-gain circuit of the present invention.
Fig. 3 is the electrical block diagram of signal filtering amplifying circuit of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, the present invention is primarily of central processing unit, first wireless signal transmission module, second wireless signal transmission module, PC, image acquisition device, the vibration transducer be all connected with central processing unit, data-carrier store, sound collector, power supply and alarm, be serially connected in the signal filtering amplifying circuit between vibration transducer and central processing unit, and be serially connected in the picture signal auto-gain circuit composition between image acquisition device and central processing unit.Wherein, as shown in Figure 2, it is by the image signal conversion circuits be connected with image acquisition device for described picture signal auto-gain circuit, and the variable gain circuit be connected with image signal conversion circuits forms.
For guaranteeing reliability service of the present invention, described first wireless signal transmission module and the second wireless signal transmission module all preferentially adopt PTR2000 type wireless signal transmission module to realize.Described central processing unit preferentially adopts QX9910M integrated chip, the NC pin of this QX9910M integrated chip is connected with alarm, BST pin is connected with data-carrier store, SET pin is connected with sound collector, RT pin is connected with the DI pin of the first wireless transport module, and VC pin is connected with power supply.Described power supply is 6V DC voltage, and this 6V DC voltage is that central processing unit is powered.
As shown in Figure 2, described image signal conversion circuits by conversion chip U1, triode VT1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, polar capacitor C1, polar capacitor C2, polar capacitor C3, diode D1, and diode D2 forms.
During connection, the P pole of diode D2 is connected with the SOU pin of conversion chip U1 after resistance R2 through resistance R3 in turn, N pole is connected with the DA pin of conversion chip U1 after resistance R6.The positive pole of polar capacitor C1 is connected with the LN pin of conversion chip U1, negative pole is connected with image acquisition device as the input end of image signal conversion circuits after resistance R1.The P pole of diode D1 is connected with the negative pole of polar capacitor C1, N pole is connected with the base stage of triode VT1.The positive pole of polar capacitor C2 is connected with the CS pin of conversion chip U1, negative pole is connected with the CN pin of conversion chip U1 after resistance R5 through resistance R4 in turn.The positive pole of polar capacitor C3 is connected with the SW pin of conversion chip U1, negative pole extremely jointly forms the output terminal of image signal conversion circuits with the N of diode D2 and is connected with variable gain circuit.The DR pin of described conversion chip U1 is connected with the P pole of diode D2, the GND pin ground connection of this conversion chip U1; The negative pole of described polar capacitor C2 is connected with the emitter of triode VT1.
Further, described variable gain circuit by triode VT2, triode VT3, field effect transistor MOS, resistance R7, adjustable resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, polar capacitor C4, polar capacitor C5, diode D3, and diode D4 forms.
During connection, the P pole of diode D4 is connected with the N pole of diode D2 after resistance R7, N pole is connected with the emitter of triode VT3 after resistance R12.The positive pole of polar capacitor C5 is connected with the P pole of diode D4 after resistance R11, negative pole is connected with the base stage of triode VT3.The P pole of diode D3 is connected with the drain electrode of field effect transistor MOS after adjustable resistance R8, N pole is connected with the base stage of triode VT2.Resistance R9 one end is connected with the base stage of triode VT2, the other end is connected with the grid of field effect transistor MOS.The positive pole of polar capacitor C4 is connected with the emitter of triode VT2, negative pole is connected with the source electrode of field effect transistor MOS.The P pole of diode D5 is connected with the emitter of triode VT3, N pole is connected with the source electrode of field effect transistor MOS after resistance R10.
The base stage of described triode VT2 is connected with the negative pole of polar capacitor C3, its grounded collector; The N pole of described diode D4 is connected with the drain electrode of field effect transistor MOS; The grounded collector of triode VT3; The N pole of described diode D5 as variable gain circuit output terminal and be connected with the IN pin of QX9910M integrated chip.
The present invention operationally, picture signal auto-gain circuit can carry out anti-interference process to the image analoging signal collected that image acquisition device exports, eliminate the noise signal in this image analoging signal, image analoging signal is converted to viewdata signal by conversion chip U1 simultaneously.This viewdata signal carries out gain by the variable gain circuit arranged in this circuit to the low frequency signal in signal, guarantees that the frequency of the viewdata signal exported is consistent, thus ensure that the accuracy of intelligent anti-theft system of the present invention to image acquisition.For better implementing the present invention, described conversion chip U1 then preferentially adopts AX2002 integrated chip to realize.
As shown in Figure 3, it is by amplifier P1, amplifier P2, triode VT4 for described signal filtering amplifying circuit, triode VT5, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, polar capacitor C6, polar capacitor C7, polar capacitor C8, polar capacitor C9, polar capacitor C10, diode D6, diode D7, and diode D8 forms.
During connection, the negative pole of polar capacitor C6 is connected with the collector of triode VT4, positive pole as signal filtering amplifying circuit input end and be connected with vibration transducer.The N pole of diode D6 is connected with the base stage of triode VT4, P pole is connected with the positive pole of polar capacitor C6 after resistance R13.The negative pole of polar capacitor C7 is connected with the positive pole of amplifier P1, positive pole is connected with the positive pole of polar capacitor C6 after resistance R14.
The positive pole of described polar capacitor C9 is connected with the output terminal of amplifier P2 after resistance R19, negative pole is connected with the base stage of triode VT4 after resistance R15.One end of resistance R16 is connected with the emitter of triode VT4, the other end is connected with the positive pole of amplifier P2.The P pole of diode D7 is connected with the output terminal of amplifier P1, N pole is connected with the emitter of triode VT5 after resistance R18.The positive pole of polar capacitor C8 is connected with the negative pole of amplifier P2, negative pole is connected with the N pole of diode D7.The P pole of diode D8 is connected with the N pole of diode D7 after resistance R17, N pole is connected with the emitter of triode VT5 after polar capacitor C10.
The minus earth of described amplifier P1; The output terminal of described amplifier P2 is connected with the base stage of triode VT5, the output terminal of this amplifier P2 as signal filtering amplifying circuit output terminal and be connected with the EN pin of QX9910M integrated chip; The grounded collector of described triode VT5.
The present invention operationally, undesired signal in the vibration signal that signal filtering amplifying circuit can export vibration transducer suppresses or eliminates, and undertaken amplifying rear output by amplifier P2 by the vibration signal after process, thus ensure that the vibration signal that vibration transducer exports can accurately be transferred to central processing unit.
During operation, knock when there being people or moving silver cabinet time, the vibration signal of collection is transferred to central processing unit by described vibration transducer after signal filtering amplifying circuit filter and amplification, described central processing unit then exports and controls electric current to image acquisition device, described image acquisition device then preferentially adopts TR350 type infrared pick-up head to realize, this image acquisition device starts to gather image information after the control electric current obtaining central processing unit transmission, and gathered image information is carried out through picture signal auto-gain circuit the viewdata signal that generates after signal conversion processes, and be transferred to central processing unit after gain is carried out to the low frequency signal in this viewdata signal, central processing unit stores being transferred to data-carrier store after viewdata signal analysis identification.
Now, gathered acoustic information for gathering all acoustic informations of safety cabinet peripheral extent, and is transferred to central processing unit by described sound collector, and central processing unit then stores being transferred to data-carrier store after this acoustic information system.Described central processing unit exports and controls electric current to alarm while image acquisition device and sound collector are opened, and alarm starts to send chimes of doom.Viewdata signal and voice signal are transferred to the second wireless transport module by the first wireless transport module by described central processing unit simultaneously, this second wireless transport module then by receive pickup electrode data line transfer to PC.
For guaranteeing practical effect of the present invention, described and vibration transducer preferentially adopts BM7008 type vibration transducer to realize; Sound collector then preferentially adopts VCA-1008 type sound collector to realize simultaneously.
As mentioned above, just the present invention can well be realized.
Claims (9)
1. the intelligent anti-theft system based on the wireless transmission of signal filtering amplifying circuit, primarily of central processing unit, first wireless signal transmission module, second wireless signal transmission module, PC, image acquisition device, the vibration transducer be all connected with central processing unit, data-carrier store, sound collector, power supply and alarm, and be serially connected in the picture signal auto-gain circuit composition between image acquisition device and central processing unit; It is characterized in that, between vibration transducer and central processing unit, be also serially connected with signal filtering amplifying circuit.
2. the intelligent anti-theft system of a kind of wireless transmission based on signal filtering amplifying circuit according to claim 1, it is characterized in that, described signal filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT4, triode VT5, negative pole is connected with the collector of triode VT4, positive pole is as the input end of signal filtering amplifying circuit and the polar capacitor C6 be connected with vibration transducer, N pole is connected with the base stage of triode VT4, the diode D6 that P pole is connected with the positive pole of polar capacitor C6 after resistance R13, negative pole is connected with the positive pole of amplifier P1, the polar capacitor C7 that positive pole is connected with the positive pole of polar capacitor C6 after resistance R14, positive pole is connected with the output terminal of amplifier P2 after resistance R19, the polar capacitor C9 that negative pole is connected with the base stage of triode VT4 after resistance R15, one end is connected with the emitter of triode VT4, the resistance R16 that the other end is connected with the positive pole of amplifier P2, P pole is connected with the output terminal of amplifier P1, the diode D7 that N pole is connected with the emitter of triode VT5 after resistance R18, positive pole is connected with the negative pole of amplifier P2, the polar capacitor C8 that negative pole is connected with the N pole of diode D7, and P pole is connected with the N pole of diode D7 after resistance R17, the diode D8 that N pole is connected with the emitter of triode VT5 after polar capacitor C10 forms, the minus earth of described amplifier P1, the output terminal of described amplifier P2 is connected with the base stage of triode VT5, the output terminal of this amplifier P2 as signal filtering amplifying circuit output terminal and be connected with central processing unit, the grounded collector of described triode VT5.
3. the intelligent anti-theft system of a kind of wireless transmission based on signal filtering amplifying circuit according to claim 2, it is characterized in that, described picture signal auto-gain circuit is then by the image signal conversion circuits be connected with image acquisition device, and the variable gain circuit be connected with image signal conversion circuits forms; The output terminal of described variable gain circuit is then connected with central processing unit.
4. the intelligent anti-theft system of a kind of wireless transmission based on signal filtering amplifying circuit according to claim 3, it is characterized in that, described image signal conversion circuits is by conversion chip U1, triode VT1, P pole is connected with the SOU pin of conversion chip U1 after resistance R2 through resistance R3 in turn, the diode D2 that N pole is connected with the DA pin of conversion chip U1 after resistance R6, positive pole is connected with the LN pin of conversion chip U1, the polar capacitor C1 that negative pole is connected as the input end of image signal conversion circuits and with image acquisition device after resistance R1, P pole is connected with the negative pole of polar capacitor C1, the diode D1 that N pole is connected with the base stage of triode VT1, positive pole is connected with the CS pin of conversion chip U1, negative pole is in turn through polar capacitor C2 that resistance R4 is connected with the CN pin of conversion chip U1 after resistance R5, and positive pole is connected with the SW pin of conversion chip U1, negative pole and the N of diode D2 extremely jointly form the output terminal of image signal conversion circuits and the polar capacitor C3 be connected with variable gain circuit forms, the DR pin of described conversion chip U1 is connected with the P pole of diode D2, the GND pin ground connection of this conversion chip U1, the negative pole of described polar capacitor C2 is connected with the emitter of triode VT1.
5. the intelligent anti-theft system of a kind of wireless transmission based on signal filtering amplifying circuit according to claim 4, it is characterized in that, described variable gain circuit is by triode VT2, triode VT3, field effect transistor MOS, P pole is connected with the N pole of diode D2 after resistance R7, the diode D4 that N pole is connected with the emitter of triode VT3 after resistance R12, positive pole is connected with the P pole of diode D4 after resistance R11, the polar capacitor C5 that negative pole is connected with the base stage of triode VT3, P pole is connected with the drain electrode of field effect transistor MOS after adjustable resistance R8, the diode D3 that N pole is connected with the base stage of triode VT2, one end is connected with the base stage of triode VT2, the resistance R9 that the other end is connected with the grid of field effect transistor MOS, positive pole is connected with the emitter of triode VT2, the polar capacitor C4 that negative pole is connected with the source electrode of field effect transistor MOS, and P pole is connected with the emitter of triode VT3, the diode D5 that N pole is connected with the source electrode of field effect transistor MOS after resistance R10 forms, the base stage of described triode VT2 is connected with the negative pole of polar capacitor C3, its grounded collector, the N pole of described diode D4 is connected with the drain electrode of field effect transistor MOS, the grounded collector of triode VT3, the N pole of described diode D5 as variable gain circuit output terminal and be connected with central processing unit.
6. the intelligent anti-theft system of a kind of wireless transmission based on signal filtering amplifying circuit according to claim 5, is characterized in that, described image acquisition device is infrared pick-up head is TR350 type infrared pick-up head.
7. the intelligent anti-theft system of a kind of wireless transmission based on signal filtering amplifying circuit according to claim 6, is characterized in that, described vibration transducer is BM7008 type vibration transducer.
8. the intelligent anti-theft system of a kind of wireless transmission based on signal filtering amplifying circuit according to claim 7, is characterized in that, described sound collector is VCA-1008 type sound collector.
9. the intelligent anti-theft system of a kind of wireless transmission based on signal filtering amplifying circuit according to claim 8, is characterized in that, described conversion chip U1 is AX2002 integrated chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510973918.9A CN105405230A (en) | 2015-12-22 | 2015-12-22 | Wireless transmission intelligent antitheft system based on signal filtering amplification circuit |
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| CN201510973918.9A CN105405230A (en) | 2015-12-22 | 2015-12-22 | Wireless transmission intelligent antitheft system based on signal filtering amplification circuit |
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| CN105405230A true CN105405230A (en) | 2016-03-16 |
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Application publication date: 20160316 |