CN1479262A

CN1479262A - Antitheft alarming system with encryption remote control device

Info

Publication number: CN1479262A
Application number: CNA02138200XA
Authority: CN
Inventors: 王振华
Original assignee: ZHANGJIAGANG HUOWANG ELECTRICAL EQUIPMENT CO Ltd
Current assignee: ZHANGJIAGANG HUOWANG ELECTRICAL EQUIPMENT CO Ltd
Priority date: 2002-08-29
Filing date: 2002-08-29
Publication date: 2004-03-03

Abstract

The invented device is composed of coding transmitting circuit and correspondent coding receiving circuit. The coding transmitting circuit includes 4 bits unlocking code input end on the roll code encoder, relevant input keys for unlocking code, serial out end and antenna. The serial out end on the roll code encoder and antenna are connected to modem module. The coding receiving circuit includes correspondent modem, antenna, roll code decoder, clock oscillator, input end and output end for learning and input end and output end of decoder. The antenna and decoder are connected to the modem. The clock oscillator composed of resistance and capacitance is on the up end of the modem. The invention increases security by using roll code technique.

Description

The coding and decoding telechiric device of guard against theft and alarm system

The present invention relates to a kind of coding and decoding telechiric device of guard against theft and alarm system, relate in particular to a kind of coding and decoding control device that guard against theft and alarm system is carried out straighforward operation.

At present, the coding and decoding telechiric device that is used for guard against theft and alarm system on market mainly comprises compositions such as encoding transmitting circuit and corresponding with it coding receiving circuit, during use, operation coding and decoding telechiric device just can be realized the remote control of guard against theft and alarm system control such as deploy troops on garrison duty, withdraw a garrison.Mainly there are following two defectives in traditional coding and decoding control device: the one, and the Password Length that the coding and decoding control device sends is limited, therefore, the offender can adopt " scanner ", in the short period of time, all passwords are sent one time, thereby make guard against theft and alarm system lose function of keeping secret; The 2nd, because the each password that sends of general compiled sign indicating number device immobilizes, therefore, when the emission password, the offender can catch all passwords and note by " grabbing a yard device ", thereby reaches the purpose of forcible entry.

The object of the present invention is to provide a kind ofly can become password automatically, the password of each transmission is all inequality, can prevent effectively that password from being intercepted, the coding and decoding telechiric device of the guard against theft and alarm system of scanning or pirate.

For realizing purpose of the present invention, a kind of coding and decoding telechiric device of guard against theft and alarm system, comprise: encoding transmitting circuit and corresponding with it coding receiving circuit, described encoding transmitting circuit comprises: rolling code scrambler IC1, be arranged on four unlocking cipher input end D1 on the rolling code scrambler IC1, D2, D3 and D4 and respectively with four unlocking cipher input end D1, D2, the corresponding unlock code enter key of D3 and D4 S1, S2, S3 and S4, the serial output terminal D0 and the modulation module I C2 that are arranged on the rolling code scrambler IC1 link, and antenna TX1 and modulation module I C2 link; Described coding receiving circuit comprises the corresponding modulatedemodulate adjusting of modulation module I C2 module I C3, with the joining antenna TX2 of modulation module I C3, with the joining rolling code code translator of IC2 IC4, the OSC end that is arranged on the modulation module I C2 is formed clock oscillator RC jointly with resistance R 4, capacitor C1, is arranged on rolling code code translator IC4 and goes up study input end LRN1, study output terminal LRN0 and coding and decoding output terminal D1 ', D2 ', D3 ' and D4 '.

The advantage of the coding and decoding telechiric device of guard against theft and alarm system of the present invention is; Improved the confidentiality of guard against theft and alarm system by the rolling coding technology, used safer reliable.

Below in conjunction with accompanying drawing the present invention is described in further detail;

Fig. 1 is the encoding transmitting circuit figure of the coding and decoding telechiric device of guard against theft and alarm system of the present invention;

Fig. 2 is the coding receiving circuit figure of the coding and decoding telechiric device of guard against theft and alarm system of the present invention.

A kind of coding and decoding telechiric device of guard against theft and alarm system comprises: encoding transmitting circuit and corresponding with it coding receiving circuit.As shown in Figure 1, described encoding transmitting circuit comprises: rolling code scrambler IC1, be arranged on the rolling code scrambler IC1 four unlocking cipher input end D1, D2, D3 and D4 and respectively with four unlocking cipher input end D1, D2, D3 and the corresponding unlock code enter key of D4 S1, S2, S3 and S4, the serial output terminal D0 and the modulation module I C2 that are arranged on the rolling code scrambler IC1 link, and antenna TX1 and modulation module I C2 link; The chip model of rolling code scrambler IC1 is ACM1330E, this chip internal is integrated with clock circuit, unlocking cipher input end D1, D2, in D3 and the D4 pull down resistor is arranged, enter key S1 unblanks, S2, S3 and S4 can press simultaneously, when they are pressed, ACM1330E rolling code scrambler IC1 inside just generates a random cipher automatically, and carry out producing after the computing a new keying sequence with the unlock code of input, export by serial output terminal D0, simultaneously, be arranged on rolling code coder IC1 and go up negative pulse of LED end output, outwards launch through IC2, luminotron LED is once glittering, and the expression keying sequence is sent, and chip just carries out little power consumption electricity-saving state automatically then.

As shown in Figure 2, described coding receiving circuit comprises the corresponding modulatedemodulate adjusting of modulation module I C2 module I C3, with the joining antenna TX2 of modulation module I C3, with the joining rolling code code translator of IC2 IC4, the OSC end that is arranged on the modulation module I C2 is formed clock oscillator RC jointly with resistance R 4, capacitor C1, is arranged on rolling code code translator IC4 and goes up study input end LRN1, study output terminal LRN0 and coding and decoding output terminal D1 ', D2 ', D3 ' and D4 '; Modulation module I C2 and IC3 are a pair of long wave serial data modulation modules, model is T630 or T631, and operating voltage is 1.5-20V, and working current is decided on the operating voltage height, T630 is 0.4-6MA, T631 is 1.75-22MA, adopts the 150KHz long wave to make information and transmits carrier, and emissive power is in the milliwatt level, it is 50 meters that the effective communication distance adds antenna, long wave is not subjected to the obstruct of objects such as buildings, cabinet, and with the not mutual interference mutually of other electrical equipment, it is comparatively convenient to use; Rolling code scrambler IC4 adopts the ACM1550D chip, the signal that coupled clock oscillator RC produces carries out through inside that key discriminates, after the computing, decoding by coding and decoding output terminal D1 ', D2 ', D3 ' and D4 ' output, the action of executive circuits such as control electromagnetic lock and alarm.When supply voltage was lower than normal voltage 75%, low-voltage detected output terminal VLOW and becomes the indication of low level driven for emitting lights, and MCLR connects high level for removing end during operate as normal.Be arranged on study input end LRN0 and LRN1 on the rolling code code translator IC4, mainly be to be used to make the keying sequence of rolling code code translator synchronous, operation steps is: press learn switch S5 earlier, make study input end LRN1 equal 0, press unlock code enter key S1, S2, S3 and S4 then, in one or several key, the keying sequence of study and storage coder after code translator is received coded signal, if learning success, then learn positive pulse of output terminal LRN0 output, once indicate by LED2 is glittering.

Claims

1, a kind of coding and decoding telechiric device of guard against theft and alarm system, comprise: encoding transmitting circuit and corresponding with it coding receiving circuit, it is characterized in that: described encoding transmitting circuit comprises: rolling code scrambler IC1, be arranged on four unlocking cipher input end D1 on the rolling code scrambler IC1, D2, D3 and D4 and respectively with four unlocking cipher input end D1, D2, the corresponding unlock code enter key of D3 and D4 S1, S2, S3 and S4, the serial output terminal D0 and the modulation module I C2 that are arranged on the rolling code scrambler IC1 link, and antenna TX1 and modulation module I C2 link; Described coding receiving circuit comprises the corresponding modulatedemodulate adjusting of modulation module I C2 module I C3, with the joining antenna TX2 of modulation module I C3, with the joining rolling code code translator of IC2 IC4, the OSC end that is arranged on the modulation module I C2 is formed clock oscillator RC jointly with resistance R 4, capacitor C1, is arranged on rolling code code translator IC4 and goes up study input end LRN1, study output terminal LRN0 and coding and decoding output terminal D1 ', D2 ', D3 ' and D4 '.