CN205302583U - Plain type anti -lost device - Google Patents

Abstract

The utility model discloses a plain type anti -lost device, including parasite aircraft and machine tool, parasite aircraft and machine tool carry out the communication through wireless, the parasite aircraft includes high -frequency receiving circuit, detection circuit, amplification and rectification circuit, decoding circuit, the warning circuit who connects gradually including the coding circuit, carrier circuit, the high -frequency emission circuit that connect gradually, machine tool. The utility model discloses it has following advantage to compare prior art: this plain type anti -lost device has only simple machine tool and parasite aircraft, does not have loaded down with trivial details setting also need not carry out the training of what specialty promptly, only need open the switch and can use. The complicated operation of having given up the existing market existing product is with applied, and simple and clear is very suitable to old crowd.

Description

Plain type anti-loss device

Technical field

The utility model relates to a kind of wearable equipment, in particular anti-loss device.

Background technology

Along with social progress; the quickening of modern life rhythm; in allegro city life; the chance that people go out is also more and more, and a lot of people usually can be forgetful, usually can not remember clearly handbag is placed on to there; or phone is lost; what more kill is sometimes to look after children and go into the street, and slightly careless child has just lost, with bag sometimes also unavoidably kept a close watch on by thief. The ship time such as waiting for bus, slightly careless, thief will carry away your bag, if child goes astray from the group, that is just more anxious.

So for the generation that prevents that this kind of thing, electronics anti-loss alarm just arises at the historic moment. Electronic anti-theft apparatus is small and exquisite, is easy to carry, and is widely used in mobile phone, wallet, case and bag, the anti-theft of the valuables such as child (people) product and anti-lost use. Its distance can not pointed out warning in certain monitoring range, will alarm director relative article or child's loss once exceed corresponding distance.

Have in the market various anti-loss devices, but its operation all needs user of service on the mobile phone of oneself, to download an APP, be then correlated with arrange after by mobile phone to warning message of owner. But in the middle of real life, easily forget or that occur that child sternly do not cause that children lose because of monitoring is older elders mostly, and for these crowds, just anti-loss device operation inconvenience in the market or can not use. Cause this predicament to have following two kinds of reasons, these crowds are because shortcoming appears in age growth memory aspect on the one hand, for anti-loss device have in the urgent need to, due to older poor for new things ability to accept, can not as young man, use very easily smart mobile phone carry out relevant program application and arrange on the other hand.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of operation and application very simple plain type anti-loss device.

The utility model solves the problems of the technologies described above by the following technical programs: a kind of plain type anti-loss device, comprise handset and machine tool, described handset and machine tool carry out communication by wireless, described handset comprises the coding circuit, carrier circuit, the high frequency transmission circuit that connect successively, and machine tool comprises the high frequency receiving circuit, detecting circuit, amplification and rectification circuit, decoding circuit, the warning circuit that connect successively.

Further, in this high frequency transmission circuit, capacitor C 2 is connected in parallel on the two ends of switch JP, inductance L 1, capacitor C 5, C6 is connected in parallel on the two ends of switch JP after connecting successively, the first port of one end connecting valve JP of capacitor C 4, the other end connects the colelctor electrode of high-frequency triode Q1, the emitter stage of high-frequency triode Q1 is received switch JP the second port by resistance R 5, the base stage of high-frequency triode Q1 is connected to antenna output end, simultaneously, the colelctor electrode of high-frequency triode Q1 is connected between inductance L 1 and capacitor C 5, the emitter stage of high-frequency triode Q1 is connected between capacitor C 5 and capacitor C 6.

Further, the base stage of high-frequency triode Q1 is connected to antenna output end by capacitor C 1.

Further, variable resistor R6 is connected between antenna output end and the first port of switch JP.

Further, capacitor C 3 is connected between the base stage and ground of high-frequency triode Q1.

Further, inductance L 1 use loop aerial.

Further, capacitor C 8 is connected in parallel on the two ends of switch JP.

Further, in this high frequency receiving circuit, resistance R 9 and capacitor C 50 are connected between power supply VCC and ground, the first end ground connection of resistance R 1, Liao Si in parallel road between the second end of resistance R 1 and ground, respectively: capacitor C 40, diode D1, the resistance R 8 of series connection successively; Resistance R 2 and the capacitor C 60 of the capacitor C 80 of series connection, triode Q3, inductance L 20, parallel connection successively; Inductance L 10, the capacitor C 30 of series connection; Resistance R 3, capacitor C 70, the capacitor C 90 of series connection successively. Wherein the positive pole of diode D1 connects capacitor C 40, negative pole connecting resistance R8, the colelctor electrode of triode Q3 is received between capacitor C 80 and inductance L 10 and capacitor C 30 simultaneously, the base stage of triode Q3 is received between resistance R 9 and capacitor C 50 and the positive pole of diode D1 simultaneously, and the emitter stage of triode Q3 connects inductance L 20. The base stage of triode Q2 is received between capacitor C 70 and capacitor C 90, and the colelctor electrode of triode Q2 meets power supply VCC by resistance R 4, the grounded emitter of triode Q2. One end of resistance R 7 is received between capacitor C 70 and capacitor C 90, the other end is connected to 5 pin of chip LM311P by resistance R 11,5 pin of chip LM311P ground connection simultaneously, 3 pin of chip LM311P are by capacitor C 10 ground connection, 7 pin of chip LM311P meet power supply VCC, 8 pin of chip LM311P meet power supply VCC by resistance R 10, the 1 pin ground connection of chip LM311P.

Further, described capacitor C 80 is tunable capacitor, and scope is 0 to 30pF.

Further, described coding circuit adopts encoder PT2262, and decoding circuit adopts decoder PT2272.

The utility model has the following advantages compared to existing technology: this plain type anti-loss device only has simple machine tool and handset, does not have loaded down with trivial details setting also not need to carry out the training of what specialty, and only need to open switch can use. Wallet, key, handbag, child that needs are guarded wear upper handset, machine tool is carried, once wallet, key, handbag, child be not in certain scope, machine tool will send alarm sound prompting personnel relative article or child's loss. Plain type anti-loss device has been given up complex operations and the application of existing market existing product, simple and clear very applicable for elderly population, and price is very cheap can enjoy for average family convenience and the safety that science and technology is brought.

Brief description of the drawings

Fig. 1 is the circuit theory schematic diagram of the utility model plain type anti-loss device;

Fig. 2 is the integrated circuit figure of the utility model plain type anti-loss device;

Fig. 3 is the circuit diagram of the high frequency receiving circuit of the utility model plain type anti-loss device.

Detailed description of the invention

Below embodiment of the present utility model is elaborated; the present embodiment is implemented under taking technical solutions of the utility model as prerequisite; provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.

As shown in Figure 1, the utility model plain type anti-loss device comprises handset and machine tool, and described handset and machine tool carry out communication by wireless.

Described handset comprises the coding circuit, carrier circuit, the high frequency transmission circuit that connect successively, and coding circuit output has the code signal of address information, delivers to high frequency transmission circuit and modulates, the electromagnetic wave of stable output by carrier circuit.

Machine tool comprises the high frequency receiving circuit, detecting circuit, amplification and rectification circuit, decoding circuit, the warning circuit that connect successively. High frequency receiving circuit receives after the electromagnetic wave signal with some strength of handset transmitting, by detecting circuit, it is carried out to detection and restore code signal, code signal is delivered to decoding circuit after the amplification shaping of amplification and rectification circuit, if the address of decoding circuit is identical with the address of code signal, the signal of decoding circuit output is not worked rear class warning circuit, when handset and machine tool distance exceedes certain limit, decoding circuit output signal makes warning circuit work.

The utility model design only has machine tool and two parts of handset, in the process of use, only article anti-lost needs need to be worn to handset, for example wallet, handbag, luggage case, mobile phone, key and easy missing child. Then with it owner is worn on machine tool, once wallet loses or children loss all can be reported to the police immediately at one's side.

In this high frequency transmission circuit, capacitor C 2, C8 is connected in parallel on the two ends of switch JP, inductance L 1, capacitor C 5, C6 is connected in parallel on the two ends of switch JP after connecting successively, the port one of one end connecting valve JP of capacitor C 4, the other end connects the colelctor electrode of high-frequency triode Q1, the emitter stage of high-frequency triode Q1 is received switch JP port 2 by resistance R 5, the base stage of high-frequency triode Q1 is connected to antenna output end by capacitor C 1, variable resistor R6 is connected between antenna output end and the port one of switch JP, simultaneously, the colelctor electrode of high-frequency triode Q1 is connected between inductance L 1 and capacitor C 5, the emitter stage of high-frequency triode Q1 is connected between capacitor C 5 and capacitor C 6. capacitor C 3 is connected between the base stage and ground of high-frequency triode Q1.

This radiating circuit adopts capacitance connecting three point type oscillator, oscillator signal is carried out to frequency-selecting by LC, and operation principle and calculation of parameter are as follows, and one of ordinary skill in the art should be understood, adopt other parameter can reach equally identical effect, innovative point of the present utility model is the design of circuit:

(1) high-frequency triode Q1 selects 9018, and cut-off frequency reaches 1G; The oscillator of capacitor C 4, a capacitance three-point type of C5, C6 composition, C4 is for resonance, make frequency drop on 70 in 88MHz, should select 20pF left and right more suitable, select 18pF here, C5, C6 play positive feedback effect, make circuit produce vibration, here feedback factor C5/C6=1/13, considers triode interelectrode capacity, and C5, C6 select respectively the ceramic disc capacitor of 5pF, 100pF;

(2) resonator of C4, L1 composition, plays frequency-selecting effect: for making tranmitting frequency between 70～88MHZ, just in time cover receive frequency within the scope of FM receiver TS, avoid FM FM radio station, we select C4 is 18pF, passes through formula as far as possible

$L=\frac{1}{4{\mathrm{\π}}^2{f}^{2}C}$

Can be regarded as:

$L=\frac{1}{4\×{3.14}^2\×{(80\×{10}^6)}^2\×(18\×{10}^{-12})}=0.25\mathrm{\μ}H$

The L1 loop aerial here, had both done inductance, made again antenna, made loop aerial with the enamel-covered wire of long 20cm, diameter 0.9mm left and right, can change L value by the shape that changes antenna;

(3) C1 plays coupling, allows pulse pass through, desirable 1uF;

(4) adjustable resistance can regulate the impulse amplitude by C1, makes coding obtain amplitude modulation in various degree, and amplitude modulation coefficient m=gets 0 to 2/3, R6=100K here;

(5) C2, C8 are power filtering capacitors, because large electric capacity generally adopts winding process to make, so equivalent inductance is larger, a little capacitor C 8 in parallel can make the high frequency internal resistance of power supply reduce, C2 selects 100uF electrochemical capacitor, it is 103 to 104 more suitable that C8 gets, and selects 103 ceramic disc capacitor here;

(6) C3 plays high frequency channel effect, selects 1nF more suitable.

Referring to shown in Fig. 3, is the circuit diagram of the high frequency receiving circuit of the utility model plain type anti-loss device. Receiving circuit adopts superregenerative formula circuit, signal is carried out to deliver to decoding circuit through shaping again after demodulation and decode.

In this high frequency receiving circuit, resistance R 9 and capacitor C 50 are connected between power supply VCC and ground, the first end ground connection of resistance R 1, and between the second end of resistance R 1 and ground Liao Si in parallel road, respectively: capacitor C 40, diode D1, the resistance R 8 of series connection successively; Resistance R 2 and the capacitor C 60 of the capacitor C 80 of series connection, triode Q3, inductance L 20, parallel connection successively; Inductance L 10, the capacitor C 30 of series connection; Resistance R 3, capacitor C 70, the capacitor C 90 of series connection successively. Wherein the positive pole of diode D1 connects capacitor C 40, negative pole connecting resistance R8, the colelctor electrode of triode Q3 is received between capacitor C 80 and inductance L 10 and capacitor C 30 simultaneously, the base stage of triode Q3 is received between resistance R 9 and capacitor C 50 and the positive pole of diode D1 simultaneously, and the emitter stage of triode Q3 connects inductance L 20. The base stage of triode Q2 is received between capacitor C 70 and capacitor C 90, and the colelctor electrode of triode Q2 meets power supply VCC by resistance R 4, the grounded emitter of triode Q2. One end of resistance R 7 is received between capacitor C 70 and capacitor C 90, the other end is connected to 5 pin of chip LM311P by resistance R 11,5 pin of chip LM311P ground connection simultaneously, 3 pin of chip LM311P are by capacitor C 10 ground connection, 7 pin of chip LM311P meet power supply VCC, 8 pin of chip LM311P meet power supply VCC by resistance R 10, the 1 pin ground connection of chip LM311P.

Its circuit theory diagrams and calculation of parameter are as follows:

(1) more responsive to direct current biasing is a large feature of Armstrong circuit, in order to produce intermittent oscillation, must design quiescent point. Diode D1 plays clamping action, pressure drop is about 0.4V, triode Q3 selects 9018, its BE interpolar pressure drop is 0.7V left and right, supply voltage 3V, and 0.4+ (3-0.4) * R8/ (R8+R9) equals Q1B pole tension 0.7V, so can calculate R8/ (R8+R9)=1/8.5, getting R8 is 10K, and R9 is 75K;

(2) C80, L10 are frequency-selective network, and C80 is tunable capacitor, and scope is 0 to 30pF, for making receive frequency between 70～88MHZ, pass through formula

$L=\frac{1}{4{\mathrm{\π}}^2{f}^{2}C},$

Can be regarded as

(3) C30 is positive feedback electric capacity, below general 10pF, gets 8pF here;

(4) L20 is radio frequency choke, gets representative value 10uH;

(5) R2, C60 form obstructing oscillation here and produce control voltage, make circuit working at superregenerative state, get respectively 1K and 2.2nF, make intermittent oscillation between 100 to several thousand Hz;

(6) Q2 rises and amplifies and detecting action, select 9014, R4, R7 are for it provides quiescent biasing, as long as make it in magnifying state, get respectively 10K and 1M, R3, C70, C90 are detection networks, as long as ensure that C70 mainly plays coupling, C90 can filter carrier wave, retains modulation signal, so get respectively 1uF, 470pF;

(7) C10, C40, C50 play filter action, get 2.2nF;

(8) LM311 is a voltage comparator, plays shaping operation, and what irregular pulse was arranged is precipitous smooth. R11, C10 play resistance high frequency effect, and what make that 3 pin obtain is the mean value of alternating voltage, and as long as RC large, is 100K therefore get R11, and C10 is 1uF; 2 pin are directly inputted the waveform after detection; Can allow like this high low signal all obtain shaping; R10 is pull-up resistor, generally gets tens K, uses 20K here; 1,4 pin ground connection, 8 pin connect positive supply;

Finally the waveform of shaping is delivered to PT2272 and identify, its frequency of oscillation is higher than 2262 frequencies of correspondence, and 1 to 8 pin is address end, respectively can connect high level, low level and unsettled, totally 38 kinds of states; Receiver address is the same could identify in transmitting.

Coding circuit in the utility model adopts encoder PT2262, and what encoder PT2262 adopted is continuous 4 frame serial code signals. In the time that signaling allows end TE to be level "0", encoder is exported 4 frame serial code signals. In the time that signaling allows end TE to be level"1", encoder stops coding output. When allow end TE while keeping level "0" always, encoder output keeps serial output state always, until when electric circuit inspection be level"1" to TE end, encoder will stop coding output sending after last byte.

Decoding circuit in the utility model adopts decoder PT2272, decoder PT2272 adopts three frame check systems, serial code to input is carried out verification, if check results is consistent with preset address, first decoder it represent successfully decoded from a VT end high level of output " 1 ", then the data transaction in serial code is become parallel data by decoder, and deliver to the response output output of decoder, completes decode procedure. Because signal can be interfered in transmitting procedure, therefore for decoder can accurately be decoded, signal need to be decoded delivering to decoder after by filter shape.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims (10)

1. a plain type anti-loss device, it is characterized in that, comprise handset and machine tool, described handset and machine tool carry out communication by wireless, described handset comprises the coding circuit, carrier circuit, the high frequency transmission circuit that connect successively, and machine tool comprises the high frequency receiving circuit, detecting circuit, amplification and rectification circuit, decoding circuit, the warning circuit that connect successively.

2. a kind of plain type anti-loss device according to claim 1, it is characterized in that, in this high frequency transmission circuit, capacitor C 2 is connected in parallel on the two ends of switch JP, inductance L 1, capacitor C 5, C6 is connected in parallel on the two ends of switch JP after connecting successively, the first port of one end connecting valve JP of capacitor C 4, the other end connects the colelctor electrode of high-frequency triode Q1, the emitter stage of high-frequency triode Q1 is received switch JP the second port by resistance R 5, the base stage of high-frequency triode Q1 is connected to antenna output end, simultaneously, the colelctor electrode of high-frequency triode Q1 is connected between inductance L 1 and capacitor C 5, the emitter stage of high-frequency triode Q1 is connected between capacitor C 5 and capacitor C 6.

3. a kind of plain type anti-loss device according to claim 2, is characterized in that, the base stage of high-frequency triode Q1 is connected to antenna output end by capacitor C 1.

4. a kind of plain type anti-loss device according to claim 2, is characterized in that, variable resistor R6 is connected between antenna output end and the first port of switch JP.

5. a kind of plain type anti-loss device according to claim 2, is characterized in that, capacitor C 3 is connected between the base stage and ground of high-frequency triode Q1.

6. a kind of plain type anti-loss device according to claim 2, is characterized in that, inductance L 1 use loop aerial.

7. a kind of plain type anti-loss device according to claim 2, is characterized in that, capacitor C 8 is connected in parallel on the two ends of switch JP.

8. a kind of plain type anti-loss device according to claim 1, it is characterized in that, in this high frequency receiving circuit, resistance R 9 and capacitor C 50 are connected between power supply VCC and ground, the first end ground connection of resistance R 1, Liao Si in parallel road between the second end of resistance R 1 and ground, respectively: capacitor C 40, diode D1, the resistance R 8 of series connection successively, resistance R 2 and the capacitor C 60 of the capacitor C 80 of series connection, triode Q3, inductance L 20, parallel connection successively, inductance L 10, the capacitor C 30 of series connection, the resistance R 3 of series connection successively, capacitor C 70, capacitor C 90, wherein the positive pole of diode D1 connects capacitor C 40, negative pole connecting resistance R8, the colelctor electrode of triode Q3 is received between capacitor C 80 and inductance L 10 and capacitor C 30 simultaneously, the base stage of triode Q3 is received between resistance R 9 and capacitor C 50 and the positive pole of diode D1 simultaneously, the emitter stage of triode Q3 connects inductance L 20, the base stage of triode Q2 is received between capacitor C 70 and capacitor C 90, the colelctor electrode of triode Q2 meets power supply VCC by resistance R 4, the grounded emitter of triode Q2, one end of resistance R 7 is received between capacitor C 70 and capacitor C 90, the other end is connected to 5 pin of chip LM311P by resistance R 11, 5 pin of chip LM311P ground connection simultaneously, 3 pin of chip LM311P are by capacitor C 10 ground connection, 7 pin of chip LM311P meet power supply VCC, 8 pin of chip LM311P meet power supply VCC by resistance R 10, the 1 pin ground connection of chip LM311P.

9. a kind of plain type anti-loss device according to claim 8, is characterized in that, described capacitor C 80 is tunable capacitor, and scope is 0 to 30pF.

10. a kind of plain type anti-loss device according to claim 1, is characterized in that, described coding circuit adopts encoder PT2262, and decoding circuit adopts decoder PT2272.