CN2420193Y - Super small anti-theft alarm warner for car - Google Patents
Super small anti-theft alarm warner for car Download PDFInfo
- Publication number
- CN2420193Y CN2420193Y CN00231212U CN00231212U CN2420193Y CN 2420193 Y CN2420193 Y CN 2420193Y CN 00231212 U CN00231212 U CN 00231212U CN 00231212 U CN00231212 U CN 00231212U CN 2420193 Y CN2420193 Y CN 2420193Y
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- circuit
- signal
- warner
- mouth
- car
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- Expired - Fee Related
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- Burglar Alarm Systems (AREA)
Abstract
The utility model relates to a super small anti-theft alarm warner for a car, composed of two parts which are a transmitting circuit and a receiving circuit. When the owner is far away from the parking place, the warner can send out encoding FM signal and a receiver can prompt the owner accurately, when the car is stolen. The utility model has small size of the receiver and saves power energy, the remote control distance can be extended to 500 meters, no antenna communication frequency band is occupied, the battery capacity can be detected and prompted, and the warner can encode and alarm. The utility model uses paster components with high benefit, low energy consumption and high integration.
Description
The utility model relates to a kind of alarming device for automobile anti-theft.
At present, the quantity that the individual has car increases rapidly, and for antitheft, personal car all is equipped with the guard against theft and alarm system that adopts loud horn to blow a whistle and report to the police.Such warning not only high pitch disturbs residents, and away from the owner of parking area, can't know whether the car of oneself reports to the police.
The purpose of this utility model is to provide a kind of energy-saving and subcompact anti-theft alarm prompting device that command range is far away.
The utility model is made up of transmission circuit and acceptor circuit; It is characterized in that: the mouth of an encode circuit is connected with a crystal oscillator in the transmission circuit, this crystal oscillator mouth, and series resonant network is carried out frequency tripling, afterwards, through capacitor C
5Connect amplification stage, driver stage, power amplifier level amplifier; Be connected to the series resonance network at power amplifier level mouth, to the signal frequency-selecting again by two, triple-frequency harmonics filter network and impedance matching network be connected with emitting antenna; Transmission circuit also comprises the countdown circuit of being made up of two aerotrons, its input end connects the Car Burglar Alarm alarming horn, wherein first aerotron is serially connected in the transmission circuit current supply circuit, two aerotron conductings when loudspeaker have alerting signal in addition, and control first aerotron conducting, connect working power; In the acceptor circuit by induction coil as receiving wire, and be connected with local oscillation circuit by high-frequency amplifier circuit, the local oscillation signal that local oscillation circuit produces is sent into subordinate's high sensitivity FM reception circuit, carry out frequency conversion, in put, reconcile, amplification, shaping, be connected with decoding circuit by the two-stage phase inverter afterwards, after decoding circuit was confirmed code signal, its mouth became high potential, and this signal is exported by phase inverter, through the warning driving circuit, control loudspeaker is reported to the police; Described two-stage phase inverter is also formed electricity-saving on-off circuit, when it is high potential, by control circuit, connects receiver power supply, otherwise, power cutoff, the on off mode of property performance period.
The utlity model has following effect: (1) receptor volume is little, as the matchbox size; (2) power consumptive province, but continuous working was changed primary battery and can be started shooting more than 1000 hours continuously more than one month; (3) remote control distance is far away, can reach 500m; (4) emitter receives and uses amateur band, does not take band radio communication.(5) have capacity of cell and detect prompting and coding warning function.
The drawing explanation:
Fig. 1 is the transmission circuit schematic diagram of subcompact anti-theft alarm prompting device described in the utility model.
Fig. 2 is the acceptor circuit schematic diagram of subcompact anti-theft alarm prompting device described in the utility model.
Physical circuit of the present utility model and principle of work are as follows:
One. transmitter principle explanation (referring to transmitter principle figure)
IC1 (VD5026) is an encode circuit.Its 17 pin are coding output.The coding output signal is delivered to VT1 and is carried out frequency modulation (FM).
VT1 is a crystal oscillator, and its output-parallel resonant network carries out frequency tripling, and delivers to VT2 through C5 and amplify, and its output frequency is 12.152 * 3=36.456MHZ.
VT2, VT3 are the two-stage class A amplifier.It amplifies the high-frequency signal through overcutting.
VT4 is a driver stage; VT5 is the power amplifier level, and two-stage is Class C amplifier.
VT5 output through sending into after the series resonance network frequency-selecting that L8, C20 form that L8, L9, C21, C22, C25 form two, behind triple-frequency harmonics filter network and the impedance matching network, send into emitting antenna, high-frequency signal is launched.
VT6, VT7 form countdown circuit.Its input end connects the Car Burglar Alarm alarming horn.When Car Burglar Alarm was reported to the police, its high potential signal made the VT7 conducting, also conducting thereupon of VT6 after the VT7 conducting.DC12V voltage and transmission circuit are connected.High-frequency signal is outwards launched in transmission circuit work.
Two. receiver principle explanation (referring to receiver principle figure)
L1 is an induction coil, and the High Amplifier Circuit that its signal that receives is sent into VT1, VT2 composition amplifies.
VT3 is a local oscillation circuit.Oscillation frequency is 36MHZ.It carries out mixing with the 36.456MHZ signal that receives, and produces into the intermediate-freuqncy signal of 56KHZ.
IC1 (MC3367) is a high sensitivity FM reception circuit, uses as the single-conversion machine at this.The high-frequency signal through amplifying that receives is sent into IC1 3 pin with local oscillation signal, IC1 inside carry out frequency conversion, in put, export by IC1 15 pin after the demodulation, amplification, shaping.
IC3 (74HC14) is six schmitt inverters.The signal of IC1 15 pin output is sent into IC3 13 pin, by the output of 10 pin, sends into IC2 after the two-stage phase inverter amplifies shaping.
IC2 is a decoding circuit.After it has confirmed code signal that IC3 10 pin send here, its mouth 17 pin will become high potential, this signal send into IC3 9 pin after secondary is anti-phase by the output of IC3 6 pin, this signal is alarm control signal.
VT6 drives for reporting to the police, and VT4, VT5 form power supply switching control circuit (its principle and emitter, countdown circuit is identical).
It is pulse that waveform is swung in two phase inverters of IC3 (1 pin--4 pin) composition electricity-saving on-off circuits (oscillator) resonance, and the time ratio level of its high potential and zero level is 1: 5.The oscillator signal of IC3 4 pin output is sent into VT5.VT5, VT4 conducting when it is high potential.Receiver power supply is logical, otherwise receiver power supply is disconnected.That is to say that receiver power supply is in periodic switching state at ordinary times, and the time ratio of through and off is about 1: 5.Like this, just greatly reduce the average power consumption of receiver, thereby prolonged the period of service of battery greatly.
The time that emitter transmits is far longer than the transformation period in receiver switching cycle, also promptly when emitter transmits, be bound to run into receiver and be in mode of operation, when receiver in running order, and when receiving the signal of emitter emission.The alarm control signal of the described IC3:6 pin output in its front makes VT4, VT5 conducting, and receiver will be controlled by battery-conserving switch no longer this moment, and enter normal working, till the blackout that receives.
The emitter of this product, the energizing signal of countdown circuit can be any type of high potential signal (constant, pulsation all can), thus it can with the supporting use of newspaper theft alarm device of any model.
Claims (1)
1. subcompact anti-theft alarm prompting device, it is made up of transmission circuit and acceptor circuit, it is characterized in that: the mouth of an encode circuit is connected with a crystal oscillator in the transmission circuit, this crystal oscillator mouth, series resonant network is carried out frequency tripling, afterwards, and through capacitor C
5Connect amplification stage, driver stage, power amplifier level amplifier; Be connected to the series resonance network at power amplifier level mouth, to the signal frequency-selecting again by two, triple-frequency harmonics filter network and impedance matching network be connected with emitting antenna; Transmission circuit also comprises the countdown circuit of being made up of two aerotrons, its input end connects the Car Burglar Alarm alarming horn, wherein first aerotron is serially connected in the transmission circuit current supply circuit, two aerotron conductings when loudspeaker have alerting signal in addition, and control first aerotron conducting, connect working power; In the acceptor circuit by induction coil as receiving wire, and be connected with local oscillation circuit by high-frequency amplifier circuit, the local oscillation signal that local oscillation circuit produces is sent into subordinate's high sensitivity FM reception circuit, carry out frequency conversion, in put, reconcile, amplification, shaping, be connected with decoding circuit by the two-stage phase inverter afterwards, after decoding circuit was confirmed code signal, its mouth became high potential, and this signal is exported by phase inverter, through the warning driving circuit, control loudspeaker is reported to the police; Described two-stage phase inverter is also formed electricity-saving on-off circuit, when it is high potential, by control circuit, connects receiver power supply, otherwise, power cutoff, the on off mode of property performance period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00231212U CN2420193Y (en) | 2000-04-03 | 2000-04-03 | Super small anti-theft alarm warner for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00231212U CN2420193Y (en) | 2000-04-03 | 2000-04-03 | Super small anti-theft alarm warner for car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2420193Y true CN2420193Y (en) | 2001-02-21 |
Family
ID=33594152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00231212U Expired - Fee Related CN2420193Y (en) | 2000-04-03 | 2000-04-03 | Super small anti-theft alarm warner for car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2420193Y (en) |
-
2000
- 2000-04-03 CN CN00231212U patent/CN2420193Y/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 | ||
| 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 |