CN2067080U - Distance type burglar warning device for case or bag - Google Patents
Distance type burglar warning device for case or bag Download PDFInfo
- Publication number
- CN2067080U CN2067080U CN 90212252 CN90212252U CN2067080U CN 2067080 U CN2067080 U CN 2067080U CN 90212252 CN90212252 CN 90212252 CN 90212252 U CN90212252 U CN 90212252U CN 2067080 U CN2067080 U CN 2067080U
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- China
- Prior art keywords
- circuit
- capacitor
- receiver
- resistance
- case
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Burglar Alarm Systems (AREA)
Abstract
The utility model relates to a distance type anti-theft warning device for cases and bags which is an electronic device mainly used for anti-theft alarm of cases and bags. The utility model comprises a transmitter and a receiver, the transmitter comprises a modulation circuit and a high frequency oscillating circuit, and the receiver comprises a superregenerative demodulation circuit, a limiting amplification circuit, a frequency selection circuit, an enlarge circuit, a voltage doubling demodulation circuit, a comparing circuit and a buzzer. The transmitter is put in a case when the device is used, the receiver is put on a user body. When the case is away from the user at a diatance, the receiver can immediately send out alarm to prevent the lost of the case. When users go out with a child, the transmitter is put in the pocket of the child to prevent the lost of the child.
Description
The utility model is a kind of antitheft warning device of case and bag that is mainly used in, and belongs to the technical field of miniature electric alarm.
Electronic alarm is widely-used in a lot of fields, but be used on the case and bag electronic alarm up to the present, have only two kinds of oscillatory type and chain locking-types, though the action of oscillatory type electronic alarm is sensitive, but need only one vibration is arranged, alarm will send warning, and it can not be distinguished is owing to which kind of reason is vibrated.For example, this goes out on train, the automobile just inapplicable with alarm outside.And the alarm of chain locking-type, it can lock together case and bag and other article or a certain fixed object, but just can not at any time case and bag and other fixed object be locked together in some occasion, is for example going out office or at shopping etc.Therefore, the function ratio of alarm is more single at present, can not be needed the migrant person of alarm that convenient sense is arranged.
Goal of the invention of the present utility model just provides a kind of case and bag burglar alarm of limiting distance, as long as user's case and bag leave the certain distance of user, this alarm will send warning immediately.
The utility model mainly is made up of transmitter and receiver two parts.Emitter is by transistor T
1, inductance L
1, capacitor C
3, C
4, C
5Form high-frequency oscillating circuits (2), its frequency of oscillation is about 27MHz.Be sent to transistor T
1The modulation signal of base stage is by IC
1(CD4069) modulation circuit of Zu Chenging (1) produces, and its frequency is by C
1, R
2Decision.IC
1" 1,3,5,7 " pin ground connection, " 8 " pin links to each other with " 11 " pin, and connecting resistance R
2An end, resistance R
2Other end connecting resistance R
1And capacitor C
1, resistance R
1Another termination " 9 " pin, capacitor C
1Another termination " 10 " pin, IC simultaneously
1" 12 " pin draw this end and transistor T
1Base stage link to each other and meet capacitor C simultaneously
2, capacitor C
2The other end with ground join.In the transistor oscillating circuit, T
1Colelctor electrode be connected to inductance L
2, capacitor C
3, C
5, inductance L
2The other end connect power supply, capacitor C
3The other end meet T
1Emitter stage, capacitor C
4And resistance R
3Phase also connects, and the one head meets T
1Emitter stage, other end ground connection.Capacitor C
5The other end connect capacitor C
6And inductance L
1, C
6The other end sending and receiving penetrate antenna, inductance L
1Other end ground connection.In this circuit, the resistance R of decision modulating frequency
2Connection be characteristics in the utility model, it has effectively improved the stability of modulating frequency.In high-frequency oscillating circuits, coil L
1The direct ground connection of an end, this connection has also improved the stability of the higher-order of oscillation greatly.
Receiver is a superregenerative receiver, wherein with transistor T
2Be the main superregenerative detection (3) of forming, by inductance L
2-1And capacitor C
2-1, C
2-4, C
2-5Form the bikini oscillating circuit, higher-order of oscillation frequency in the scope of 20-30MHz, resistance R
5, R
6Be transistor T
2Biasing resistor, inductance L
2-2Be high frequency choke coil, capacitor C
2-2With resistance R
2-2, transistor T
2Emitter junction form detecting circuit, the audio signal after the detection is from collector resistance R
2-4And R
2-3The node place take out.Its signal passes through capacitor C
8Amplify transistor T in (4) with amplitude limit
3Base stage link to each other, at T
3Base stage and colelctor electrode between be connected to capacitor C
9, this capacitor C
9For exchanging negative-feedback electric capacity, its negative feedback improves and increases along with frequency, thereby interfering signal is that strong inhibitory action is arranged to external world.Amplitude limit amplifies the main four-operational amplifier IC that adopts
2(LM324) operational amplifier, i.e. an IC in
2" 5,6,7 " end, wherein " 5,6 " end is input, " 7 " end is output, this step voltage overall gain is more than 50 decibels, thereby reaching amplitude limit does in order to guarantee that emitter and receiver are in certain distance range, receiver afterbody output amplitude (i.e. the output amplitude of " B " point) is identical, and to improve the reliability of circuit, alarm is out of control when avoiding interference signal.
Frequency-selecting (5) mainly adds that by R, C connection in series-parallel frequency-selective network operational amplifier is formed, and frequency-selective network is by resistance R
17, R
16And capacitor C
12, C
13Form resistance R
16With capacitor C
12Be in series, be connected on " 1 " end and " 3 " of operational amplifier resistance R
17With capacitor C
13Be in parallel, be connected between " 3 " end and ground of operational amplifier.When the centre frequency of RC equaled the fundametal compoment of the square-wave modulation signal that emitter sends, the output of this operational amplifier i.e. " 1 " end was selected sinusoidal signal, thereby makes the output amplitude maximum.During no signal, this end output amplitude is very little.The signal of this part output (is IC through the amplification of next stage
2The operational amplifier formed of 12,13,14 ends) letter that signal is delivered to next stage presses detection (7), the multiplication of voltage detecting circuit is by diode D
1, D
2And resistance R
20And capacitor C
15Form diode D wherein
1Positive pole and capacitor C
14With diode D
2Negative pole join D
1Negative terminal meet the input of next stage comparator, i.e. IC
2" 9 " pin, this end is also simultaneously and resistance R
20And capacitor C
15Join diode D
2Plus earth.Relatively (8) (are IC by operational amplifier
28,9,10 ends) and resistance R
21, R
22Form, its output directly drives buzzer (9), reference voltage is by resistance R
21, R
22Dividing potential drop obtains, and is connected to " 10 " end of this partial arithmetic amplifier, and applied signal voltage connects " 9 " end, this end is an inverting input, " 8 " end is output, and when applied signal voltage equaled reference voltage, the output of comparator i.e. " 8 " end was exported zero level; When applied signal voltage during, comparator output high level, make sounding under the buzzer of alarm less than reference voltage; When applied signal voltage during greater than reference voltage, comparator is output as low level, and buzzer is sounding not.When the distance of emitter and receiver surpasses certain scope, (this machine is designed to can set arbitrarily in 3 to 8 meters) is that receiver is can only receive the small-signal of emitter or not receive transmitter signal at all the time, the output of comparator is a high level, thereby make buzzer send the sound, reach the purpose of warning.
Advantage of the present utility model is that the antitheft reminiscences of these case and bag can be contained in emitter in some case and bag, and receiver is placed in user's the pocket, when these case and bag leave for a certain reason the user certain apart from the time, receiver will send chimes of doom, loses to prevent case and bag.Emitter is placed in child's the pocket when going out carrying small children, receiver is placed in user's the pocket, when child from the adult certain apart from the time, this reminiscences will send chimes of doom, to remind the adult, prevents that child wanders away.In addition, this reminiscences volume is very little, and weight is also light, and is very easy to use.
Fig. 1 is a structured flowchart of the present utility model
Fig. 2 is a transmitter circuitry schematic diagram of the present utility model.
Fig. 3 is the utility model receiver circuit schematic diagram.
Embodiment of the present utility model is as follows:
The IC of transmitter section
1Adopting model is " CD4069 ", triode T
1Be " 9081 ", resistance R
1Be 18K Ω, R
2Be 200K Ω, R
3Be 470 Ω, R
4Be 18K Ω, capacitor C
1Be 4700PF, C
2Be 0.01 microfarad, C
3Be 68PF, C
4Be 200PF, C
5Be 1000PF, C
6Be 39PF, C
7Be 4.7 microfarads.
Receiver is the LM324 four-operational amplifier with the integrated circuit model of part, transistor T
2, T
3Be 9018, diode D
1, D
2Be 2AP9, resistance R
2-1, R
9, R
10, R
14, R
21Be 18K Ω, R
2-2, R
8Be 1.5K Ω, R
2-3Be 820 Ω, R
2-4, R
18Be 5.1K Ω, R
5Be 24K Ω, R
6Be 3K Ω, R
7Be 560K Ω, R
11Be 2.1M Ω, R
12Be 1M Ω, R
13Be 1K Ω, R
15, R
16, R
17, R
20Be 33K Ω, R
19Be 2K Ω
0Capacitor C
2-1Be 20PF, C
2-2Be 1000PF, C
2-3Be 51PF, C
2-4Be 43PF, C
2-5Be 39PF, C
2-6, C
2-7Be 0.01 microfarad, C
8Be 0.1 microfarad, C
9Be 0.022 microfarad, C
10, C
14Be 1 microfarad, C
11, C
15, C
16Be 33 microfarads, C
12, C
13It is 0.01 microfarad.Transmitter and receiver is contained in respectively on two wiring boards, and is contained in respectively in two boxes, just formed of the present utility model apart from the antitheft reminiscences of formula case and bag.
Claims (3)
1, the antitheft reminiscences of a kind of case and bag is made up of the electronic circuit part and the part of reporting to the police, and it is characterized in that this reminiscences is made of transmitter and receiver two parts, and emitter is by transistor T
1, inductance L
1, capacitor C
3, C
4, C
5Form high-frequency oscillating circuits (2), by IC
1, capacitor C
1, resistance R
1, R
2Form modulation circuit (1), to form an amplitude-modulated signal emitter; Receiver is the Superregenerative AM signal receiver, wherein with transistor T
2Be the main superregenerative detection circuit (3) of forming, by the four high guaily unit IC
2Form signal processing circuit, comprising amplitude limiting amplifier circuit (4), frequency selection circuit (5), amplifying circuit (6), multiplication of voltage detecting circuit (7) and comparison circuit (8).
2, according to claim 1 apart from the antitheft reminiscences of formula case and bag, it is characterized in that in the modulation circuit (1) resistance R
1One and ic chip
1" 9 " pin join other end and capacitor C
1And resistance R
2Join, in high-frequency oscillating circuits (2), coil L
1One terminate at capacitor C
5, C
6The node place, the direct ground connection of the other end.
3, according to claim 1 apart from the antitheft reminiscences of formula case and bag, it is characterized in that amplitude limit amplifies the transistor T of (4) in the receiver
3Colelctor electrode, and be connected to a capacitor C 9 between the base stage; Resistance R in frequency-selecting (5)
16With capacitor C
12Be in series, be connected on " 1 " end and " 3 " end of operational amplifier resistance R
17With capacitor C
13Be in parallel, be connected between " 3 " end and ground of operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212252 CN2067080U (en) | 1990-05-18 | 1990-05-18 | Distance type burglar warning device for case or bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212252 CN2067080U (en) | 1990-05-18 | 1990-05-18 | Distance type burglar warning device for case or bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2067080U true CN2067080U (en) | 1990-12-12 |
Family
ID=4891824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90212252 Withdrawn CN2067080U (en) | 1990-05-18 | 1990-05-18 | Distance type burglar warning device for case or bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2067080U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101297342B (en) * | 2005-08-17 | 2012-04-04 | 关卡系统国际股份有限公司 | Method and device for protecting articles |
| CN103315480A (en) * | 2013-07-10 | 2013-09-25 | 平湖市南桥箱包有限公司 | Positioning draw-bar box |
| CN103349409A (en) * | 2013-07-23 | 2013-10-16 | 无锡市伟丰印刷机械厂 | Anti-theft purse with amplifying circuits |
| CN103349417A (en) * | 2013-07-23 | 2013-10-16 | 无锡市伟丰印刷机械厂 | Pickproof purse with amplifying circuit |
| CN110492896A (en) * | 2019-08-30 | 2019-11-22 | 苏州锐联芯半导体有限公司 | A kind of fully integrated wireless receiving chip based on CMOS technology |
-
1990
- 1990-05-18 CN CN 90212252 patent/CN2067080U/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101297342B (en) * | 2005-08-17 | 2012-04-04 | 关卡系统国际股份有限公司 | Method and device for protecting articles |
| CN103315480A (en) * | 2013-07-10 | 2013-09-25 | 平湖市南桥箱包有限公司 | Positioning draw-bar box |
| CN103349409A (en) * | 2013-07-23 | 2013-10-16 | 无锡市伟丰印刷机械厂 | Anti-theft purse with amplifying circuits |
| CN103349417A (en) * | 2013-07-23 | 2013-10-16 | 无锡市伟丰印刷机械厂 | Pickproof purse with amplifying circuit |
| CN103349409B (en) * | 2013-07-23 | 2015-12-23 | 江苏高博智融科技有限公司 | There is the antitheft wallet of amplifying circuit |
| CN103349417B (en) * | 2013-07-23 | 2016-06-01 | 无锡市伟丰印刷机械厂 | A kind of have the antitheft wallet amplifying circuit |
| CN110492896A (en) * | 2019-08-30 | 2019-11-22 | 苏州锐联芯半导体有限公司 | A kind of fully integrated wireless receiving chip based on CMOS technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |