CN2658006Y - Radio anti-theft device - Google Patents

Abstract

A radio anti-theft device mainly includes a mainframe with a voltage stabilizing circuit of electrical source, an anti-theft code CPU circuit, a mainframe control circuit, a transmitting circuit, a mainframe receiving circuit, an electrical outlet and a wireless alarm. Wherein, a voltage stabilizing circuit, a RF wireless receiving circuit, a decoding CPU circuit and an anti-theft voice and drive circuit are arranged inside the wireless alarm; the anti-theft code CPU circuit can produce a manchester anti-theft code whose Hi-Low rate is 1:1. thereby, the bodywork structure can not be damaged when the anti-theft device is arranged on the vehicle; moreover, the wireless alarm controlled by the mainframe can analyze accurately the data codes in a short time, and thus the misjudgments and the miscontacting with other horns which also have a same product can be reduced effectively so as to control accurately and quickly the anti-theft device.

Description

Wireless theft-proof device

Technical field

The utility model relates to a kind of improved wireless theft-proof device, especially refer to that a kind of use Manchester code Hi-Low transmits than 1: 1 mode, the wireless alarm that main frame is controlled can accurately be resolved data code at short notice, and can effectively reduce erroneous judgement and other loudspeaker that this product is housed of false touch, reach rapidly the precisely utility structure of the antitheft action of control.

Background technology

Generally sell the car alarm in the market, dress mode in Yian can be divided into following two kinds: one is that main frame is contained in the car, must be during installation with the anti-theft loudspeaker output line by passing fire wall in the car (the vehicle body steel plate between engine chamber and car are interior) to engine chamber; And second kind be that main frame is contained in the engine chamber, then must with detection lines in door contact interrupter line and other cars by the engine chamber passing fire wall in car.

Above-mentioned two kinds of mounting meanss, its antitheft distribution and former factory electric wire all must passing fire walls, but general automobile is in order to prevent that waste gas and waste water flow in the car in the car, then its former factory wire hole is made encapsulation process, or S type trend, make passing through of fireproof brickwork quite difficult, if pass through by force, not only destroy original air-tight water-proof, and hurt former trolley wire, increase the degree of difficulty and the set-up time of installing.

The mode of general passing fire wall mainly comprises: open cable wire along bonnet, and directly hole etc.These modes all can damage the problem that original air-tight water-proof and installation work-hour increase, and the new car design is many especially on the market is designed to two-chip type with fireproof brickwork, more increase degree of difficulty is installed.Just sealing water is mended in the back at last, also destroyed the vehicle body single-piece attractive in appearance, be difficult to be accepted by the new car buyer.

For solving the problem of passing fire wall, so available wireless Wireless technology overcomes the problems referred to above point.But, existing wireless anti-theft device on the market mostly is by the signal of main frame in the car with all numberings and is loaded on the positive 12 volts of volt distributions of former car, utilize former car distribution to transmit code signal to the storage battery of engine chamber, and on anti-theft loudspeaker, be equipped with demoder and call control setup, but in order to distinguish with the noise on the automobile electric wire, must add than complex password and resolve and the circuit layout of data control, cost thereby big spoke improve, and it is not high to cause the car owner that wish is installed.

Moreover, the traditional encoding and decoding IC that is supplied on the market as shown in Figure 1, its data type of transmission Hi-Low ratio is 1: 3 or 3: 1, be non-equal geometric ratio, and (greater than 500ms) grown in the gap between every group of data code slightly, add airborne various signal, make with this non-impartial Hi-Low setting more represented antitheft than the data code of transmission, remove antitheft, do not close appropriate and antitheft functional representation such as once be triggered in the car, easy generation problem: as setting 2 short sound (the every short sound 50ms that pipes that pipes, interval 50～100ms) between every short sound, 1 short sound or 1 half short sound sometimes but only pipe; Setting pipes 3 short, but only pipe sometimes 2 short sound or 2 half short sound, and functional representation makes the mistake.

Summary of the invention

Because the existing problem of above-mentioned habitual alarms and security systems for automobiles, the utility model people is deeply studied improvement for overcoming the problems referred to above at above-mentioned disappearance, after experiment improves in many ways, generation of the present utility model is arranged finally.

Main purpose of the present utility model, can exempt to destroy the injury body construction when being to design a kind of installation anti-joyride device, and spoke reduces the cost on the circuit layout greatly, and make the wireless alarm Wireless Siren of main frame institute desire control can accurately resolve data code at short notice, reduce erroneous judgement and other of false touch the loudspeaker of this product are housed, and reach the wireless theft-proof device of precisely controlling rapidly.

For reaching aforesaid purpose, the set a kind of wireless theft-proof device of the utility model mainly comprises: a main frame, and it has a power supply and supplies with mu balanced circuit; One antitheft coding and cpu circuit; One host computer control circuit; One transmission circuit; One main frame acceptor circuit, socket is gone in an output; And a wireless alarm, its inside has a power supply and supplies with mu balanced circuit; One RF wireless receiving circuit; One decoding and cpu circuit; One antitheft voice and driving circuit; Wherein this antitheft coding and cpu circuit system can produce Hi-Low than the antitheft coding in Manchester of 1: 1; In view of the above, make and to exempt to destroy the injury body construction when anti-joyride device is installed, and the wireless alarm that main frame is controlled can accurately be resolved data code at short notice, and can effectively reduce erroneous judgement and other loudspeaker that this product is housed of false touch, reaches rapidly the precisely utility structure of the antitheft action of control.

For enabling further to understand constitution content of the present utility model and other characteristics, lift the utility model now than specific embodiment, and the embodiment of conjunction with figs. describes as described below in detail.

Description of drawings

Fig. 1: tradition coding IC data type of transmission scheme drawing.

Fig. 2: work scheme drawing of the present utility model.

Fig. 3: the utility model main frame diagram of block.

Fig. 4: the utility model wireless alarm diagram of block.

Fig. 5: the circuit diagram of the utility model host computer control module.

Fig. 6: the circuit diagram of the utility model wireless alarm.

The specific embodiment

As Fig. 2～shown in Figure 4, a kind of wireless theft-proof device that the utility model is designed mainly comprises: a main frame 1 and a wireless alarm 2 are formed, wherein

This main frame 1, it has a power supply and supplies with mu balanced circuit 11, with the power supply of supply main frame 1 each one; One antitheft coding and cpu circuit 12 are to produce Hi-Low than the antitheft coding in Manchester of 1: 1; One host computer control circuit 13 is with each action of main control system; One transmission circuit 14 is launched anti-theft signal;

One main frame acceptor circuit 15 is to receive remote signal; And one output go into socket 16, in order to link to each other with the automobile power supply base.And

This wireless alarm 2, its inside have a power supply and supply with mu balanced circuit 21, with the power supply of supply wireless alarm 2 each one; One RF wireless receiving circuit 24 is to receive the wireless anti-theft signal that main frame 1 transmits; One decoding and cpu circuit 22 is in order to the anti-theft signal decoding comparison that will be received; One antitheft voice and driving circuit 23 are to produce caution of sound sound and antitheft control.

During enforcement, in order to overcome above-mentioned its data type of transmission of traditional encoding and decoding IC, the Hi-Low ratio is 1: 3 or 3: 1 problems, through experiment improvement in many ways, have Manchester coding mode that data code Hi-Low ratio is made as 1: 1 only, and every group of data code pitch time just can make the wireless alarm 2 of 1 desire control of main frame less than 100ms (as shown in Figure 2), can accurately resolve at short notice, send correct tweeting sound.

As shown in Figure 5, antitheft coding and cpu circuit 12 are done coupling and protection and * 1SAW (as the vibration size of transmitting frequency) with password through R18 and are amplified through Q2 in the application, and the C11/C12/C10 vibration is launched through R16 and antenna, and R17 is the bias voltage of Q2.As shown in Figure 6, U2 is decoding and cpu circuit 22, and U3 is that voice IC forms antitheft voice and driving circuit 23 with Q1/Q2/Q3/Q4/Q5/Q6 and peripheral circuit, complies with the data code of being decoded out and sounds to drive wireless alarm 2.

By this, as Fig. 2～shown in Figure 6, utilize main frame 1 interior original CPU to be used as the Manchester code coding, not only habitual encode circuit can be saved to save the cost of circuit, and the cancellation output driving circuit that must have in addition originally, make password transmission circuit 14 into, with the data code of Manchester coding mode via the RF wireless receiving circuit 24 that is delivered to wireless alarm 2 in the air and decoding and cpu circuit 22 through cryptographic core to removing to drive the anti-theft loudspeaker tweeting sound according to data code (Data Code) content after correct, when the anti-joyride device of being formed is installed, not only can exempt to destroy the injury body construction, and the wireless alarm 2 that main frame 1 is controlled also can accurately be resolved data code at short notice, accurately send 1,2,3, the tweeting sounds of different short sound such as 4 and different time, send short half or 1 half off-square sounding such as short sound to avoid causing, and effectively reduce erroneous judgement and other loudspeaker that this product is housed of false touch, reach the precisely antitheft action of control rapidly.

In sum, wireless theft-proof device of the present utility model is except avoiding because of anti-joyride device is installed, and damage the injury of body construction, and make the coding of Manchester code Hi-Low than 1: 1 because of CPU with self, cost-cutting significantly on the circuit layout, and can in the short time, accurately resolve data code again in the control, reduce erroneous judgement and false touch, precisely control rapidly and reach, the shortcoming that can solve the conventional confguration assembling and use, outclass traditional approach on the effect, creative and industrial utilization.

Above-mentioned specific embodiment is to be used for describing in detail the purpose of this utility model, feature and effect, only be part embodiment of the present utility model, can not limit practical range of the present utility model with this, all personages who is familiar with this type of technology all can disclose the conversion or the modification of the equivalence of doing on contained device characteristic of scope and the effect according to the application, its essence does not detach spiritual category person of the present utility model, all should be included in the essential scope of the present utility model.

Claims (2)

1, a kind of wireless theft-proof device mainly comprises:

One main frame, it has the mu balanced circuit of each power supply of supply main frame; One produces Hi-Low than antitheft coding in Manchester of 1: 1 and cpu circuit; The host computer control circuit of each action of one main control system; One transmission circuit that anti-theft signal is launched; One receives the main frame acceptor circuit of remote signal; Socket is gone in one output that links to each other with the automobile power supply base; And

One wireless alarm, its inside have the supply mu balanced circuit of the power supply of each one of provisioning wireless siren horn; The RF wireless receiving circuit of the wireless anti-theft signal that one reception main frame transmits; One decoding and cpu circuit in order to anti-theft signal decoding comparison that will be received; One produces the antitheft voice and the driving circuit of caution of sound sound and antitheft control.

2, wireless theft-proof device as claimed in claim 1 is characterized in that: in antitheft coding of main frame and the cpu circuit, and the antitheft coding in its Manchester, the little what 100ms in the interval between every group code.

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