KR960002437B1 - Anti-theft system - Google Patents

Abstract

The system for installing simply and attaching additional function easily includes a CPU(8) having a control signal output tap(CO), a control signal input tap(CI), and an alarm signal output tap(SO); a CPU(21) having a sensor input tap(SI), a display output tap(L1), a control signal output tap(CO), and a control signal input tap(CI); and a CPU(27) having a door lock output tap(DL), a door open output tap(DU), and a control signal input tap(27).

Description

Car burglar alarm system

1 is an explanatory diagram for comparing an installation example of an alarm according to the present invention with a conventional alarm.

2 is an explanatory view showing only the installation state of the alarm according to the present invention.

3 is a block diagram showing a schematic configuration of the present invention.

4 is a circuit diagram showing a specific embodiment of the main device of the present invention.

5 is a circuit diagram showing a specific embodiment of the sensor unit of the present invention.

6 is a circuit diagram showing a specific embodiment of the door lock unit of the present invention.

* Explanation of symbols for main parts of the drawings

1: antenna 2: high frequency amplification circuit

3: tuning circuit 4: frequency conversion circuit

5: intermediate frequency amplifier circuit 6, 19, 26: crystal

7,20: Main device additional function connector 8: CPU

10,23,28: signal amplification unit 11: siren signal oscillator

9,22: control signal transmission unit 12: siren signal amplification unit

13: Horn 14: Ground

15: B + 16: main device

17: power line 18: sensor

21: CPU 24: light emitting diode

25: sensor unit 27: CPU

29,30: motor drive part 31: motor

32: door lock unit C1, C2: condenser

CO: Control signal output terminal DL: Door lock output terminal

DU: Door open output terminal L1: Display output terminal

Q1, Q2: transistor R1, R2: resistor

RF: Received Signal Input Terminal SI: Sensor Input Terminal

U1, U2: OP Amp X1: Crystal Connector

The present invention mainly relates to a burglar alarm system for preventing theft of a passenger car.

As it is known, as the spread of vehicles expands, not only theft of vehicles but also theft accidents of cassettes or articles mounted in the vehicles are continuously occurring.

Therefore, in recent years, vehicle burglar alarms have become widespread, and foreign companies have encouraged the installation of alarms.

However, these burglar alarms have some problems. The biggest problem is that the installation is complicated and difficult for people without knowledge of vehicle and electronic technology.

In addition, this wiring work is not only difficult, but also leads to serious accidents such as fire of the vehicle due to incorrect wiring or incorrect wiring near the driving part or heat generating part of an automobile part.

A wiring example of this conventional vehicle burglar alarm system is shown by the dotted line in FIG.

As can be seen from this, there is a sense unit 25 for detecting a door open, an impact, etc. of the vehicle, which is advantageously able to adjust the sensitivity at any time, which is installed in the interior of the vehicle and outputs an alarm sound. And when the alarm is "ON / OFF" by remote control, the main device 16, which can install various auxiliary devices in addition to the flashing lights and headlights, is installed at one side of the engine room to obtain enormous power consumption. It is common to install the door lock unit 32 inside the door so that the door can be opened and closed automatically at the time of "ON / OFF".

Such a conventional alarm is required to perform a number of wiring operations as indicated by the dotted line in FIG. 1 so that the main unit 16 and the sensor unit 25 and the main unit 16 and the door lock unit 32 are organically operated. The work is very difficult and cumbersome, and the problems described above cannot be overcome.

Therefore, the wireless communication method is used for the control of each unit as a method of installing the alarm without wiring, but it is difficult to put practical use because it requires a lot of difficult frequency regulation and manufacturing cost.

Therefore, the development of communication means between each unit that is easy to install, safe and practical is required.

In response to this request, the present invention can be easily installed without wiring between each unit, as shown by the thick solid line of FIGS. 1 and 2, as well as installing the main device 16 and the battery as a basic device. The unit 25, the door lock unit 32, the trunk opening device (not shown) or other sensors of different types can be additionally purchased and installed without wiring. The purpose is to ensure a signal transmission system between the two.

The present invention is to achieve these objects by a relatively simple and reliable economic structure as described in detail with reference to the present invention by the accompanying drawings.

A schematic configuration of a burglar alarm system for a vehicle according to the present invention is shown in FIG.

In this case, the reception signal input terminal RF to which the output signal from the antenna 1, the high frequency amplifying circuit 2, the tuning circuit 3, the frequency converting circuit 4, and the intermediate frequency amplifying circuit 5 is inputted; Control signal output terminal (CO) for outputting "ON / OFF" control signal programmed with a unique code to control the sensor unit 25 and the door lock unit 32 without malfunction. The control signal input terminal CI for receiving the pulse signal output from the sensor unit 25 and the output signal to the siren signal oscillation unit 11 and the siren signal amplification unit 12 by the detection signal from the sensor unit 25. To be connected between the CPU 8 and the control signal output terminal CO of the power supply line 17 and the CPU 8 provided with an alarm signal output terminal SO for operating the horn 13 by Control signal transmitter 9 composed of switching elements, power supply line 17 and cone Sensor input terminal (SI) to which the main device 16 is composed of the signal amplification unit (10) connected between the roll signal input terminal (CI), and the sensor (18) for detecting a shock or theft applied to the vehicle is connected. And a display output terminal L1 for generating an output for lighting the light emitting diode 24 for displaying an alarm operation state, and a control signal output for outputting a detection signal by the sensor 18 to the main device 16. CPU 21 having a control signal input terminal CI for receiving a control signal transmitted from the terminal CO and the main device 16, and its control signal output terminal CO and control signal input terminal CI. Is applied to the sensor unit 25 and the motor driving circuit by connecting the control signal transmitter 22 and the signal amplifier 23 having the same structure as the main device 16 between the power supply line 17 and the power supply line 17. Motor 31 rotates forward and backward to operate the door lock, or CPU 27 having a door lock output terminal DL and a door open output terminal DU for generating an output for deactivation, and a control signal input terminal CI for receiving a control signal transmitted from the main device 16; ), And a door lock unit 32 composed of a signal amplifying unit 28 connected between the control signal input terminal CI and the power supply line 17, and 5, 19, and 26 are CPUs (8, 21, 27 is a crystal for generating a clock pulse for the operation.

The present invention inevitably initiates the operation of the alarm system in order to park the vehicle in a certain invisible place and to be assured of theft as it is known. By operating at, a signal modulated at a specific frequency carrying a unique code is transmitted, and this radio wave is induced in the antenna 1 and amplified to a sufficient size in the high frequency amplification circuit 2, and tuned to a specific frequency in the tuning circuit 3. After the frequency conversion circuit 4 is converted to the intermediate frequency and amplified by the intermediate frequency amplification circuit 5 and its output is decoded by a decoder programmed in the CPU 8 of the main unit 16 and set in the remote controller. The CPU 8 switches ON / OFF the control signal output terminal CO only when a radio wave containing a code in which the code stored in the CPU 8 completely matches is received. The " ON " signal of the "signal "

Therefore, this reaches the power supply line 17 to which the sensor unit 25 is connected via the power supply line 17. The signal in the form of a pulse is applied to the signal amplification unit 22 of the sensor unit 25, thereby providing a CPU ( 21 is applied to the control signal input terminal CI.

Therefore, the CPU 21 decodes this signal by the built-in decoder function, recognizes the current operation start state, waits for the operation signal by the sensor 18 to be input, and completes the preparation of the alarm generation operation. will be.

In this state, the sensor 18 monitors the impact or door opening applied to the vehicle, and when the impact is applied from the outside or the door is opened, the sensor 18 operates to output the control signal input terminal CI of the CPU 21. ) And the CPU 21 converts the state into a pulse of a serial type by an encoder program inputted in advance, and applies it to the control signal output terminal CO to operate the control signal transmitter 22 to operate the power line. In 17, a serial pulse signal is carried to propagate to each part of the vehicle.

Therefore, the waveform-shaped and amplified pulse signal is applied to the control signal input terminal CI of the CPU 8 by the signal amplifier 10 of the main device 16 connected to the power supply line 17. The CPU 8 of the main device 16 outputs the alarm signal output terminal SO to operate the siren signal oscillation unit 11 and the siren signal amplification unit 12 to generate a strong alarm sound for a predetermined time in the horn 13. By notifying the people around the appearance of theft theft can be induced to give up the theft will be able to prevent theft of the vehicle.

In this way, the main unit 16 receives the operation signal by the remote controller and enters the alarm standby state, and then the sensor unit 25 and the door lock unit 32 receive the control signal from the main unit 16 so as to receive the sensor unit 25. Is to be monitored.

In addition, the door lock unit 32 receives the operation signal of the main device 16 from the power supply line 17 and applies an output to the door lock output terminal DL to operate the motor drive circuit to operate the power of the motor 31. The door lock is locked.

In this way, in the alarm system of the present invention, the operation of the operation function is completed, and when the user wants to drive a car, the operation of the alarm must be stopped to release the monitoring state.

At this time, the user operates the stop switch of the portable remote controller to emit a radio wave modulated by an operation stop code different from the operation signal, and receives the signal input terminal of the CPU 8 via the system as described above. Input to the (RF) side, and the code corresponding to the operation stop is output to the control signal output terminal (CO).

The signal is switched on the control signal transmitter 9 and loaded on the power line 17 of the vehicle, and the sensor unit 25 is connected to an input side of the signal amplifier 23 on the power line 17 of the vehicle. Therefore, the pulse signal accumulated on the power supply line 17 is applied to the control signal input terminal CI side of the CPU 21.

Therefore, the CPU 21 discriminates the "OFF" signal by the program of the pulse decoder corresponding to the input "ON / OFF" control signal and makes it invalid even if the sensor 18 applies an operation signal to the sensor input terminal SI. The sensor unit 25 is released from the monitoring operation.

On the other hand, the door lock unit 32 amplifies only the pulse signal superimposed on the power supply line 17 through the signal amplifier 28 and applies the output to the control signal input terminal CI side of the CPU 27.

Therefore, the CPU 27 discriminates the "OFF" signal by the input of the "ON / OFF" control signal and the corresponding pulse decoder program, outputs the signal to the door open output terminal (DU), and gives a predetermined value to the woofer driving circuit. By applying the output of the motor 31 is operated in the reverse direction can be unlocked the door lock state.

Therefore, the door can be opened automatically without using a key, so that it can be used conveniently.

The present invention, as seen in this series of operations, is a single strand of the existing installation of any part of the vehicle for powering the main unit 16, the sensor unit 25 and the door lock unit 32 of the alarm system. Since it uses only the + "side power supply line 17 ("-"side uses the chassis of a vehicle.), As shown in FIG. 2, it is not necessary to install a separate signal transmission cable in order to install an alarm.

In addition, it is convenient to install the main unit 16, the sensor unit 25 and the door lock unit 32 anywhere, and the function of the encoder and decoder using a high-performance CPU with high reliability with a smooth signal transmission system As a result, the structure is simplified, manufacturing costs can be reduced, and an additional system of cables is not required, thereby providing an easy-to-install alarm system.

The detailed configuration of the control signal transmitters 9 and 22 and the signal amplifiers 10 and 23 connected to the main device 16, the sensor unit 25, and the door lock unit 32 of the present invention is shown.

First, referring to FIG. 4, the control signal output terminal CO of the CPU 8 connects the resistors R1 and R2 to the bases of the Darlington connection transistors Q1 and Q2 and connects the collector to the power supply through the resistors. A control signal transmitter 9 formed by grounding the emitter, and connecting a resistor and a capacitor C1 between the power supply line 17 and the inverting terminal of the OP amplifier U1. An amplifier circuit was formed by connecting a capacitor C2 between the output side of the OP amplifier U1 and the inverting terminal of the OP amplifier U2, and a plurality of resistors were connected to the non-inverting terminal and the output side. The output of U2) is provided with a signal amplifying section 10 connected to the control data input terminal CI.

In the sensor unit 25 shown in FIG. 5, the control signal transmitter 22 and the signal amplifier 3 having the same structure as the main device 16 of FIG.

In addition, referring to FIG. 6, this also includes a signal amplifier 28 having the same structure as that of FIGS. 4 and 5.

In this embodiment, the signal output from the control signal output terminal CO of each CPU (8.21.27) of the main unit (16), the sensor unit (25) and the door lock unit (32) is sufficient by the transistors (Q1, Q2). The width is large enough and the current is limited by the resistors R1-R4 so that the series pulse can be applied to the power supply line 17 without adversely affecting the power supply despite switching the power supply line 17.

In addition, a signal detected by the power supply line 17 and applied to the control signal input terminal CI of each of the CPUs 8, 21, 27 is waveformd by the OP amplifiers U1, U2 of the signal amplifiers 10, 23. At the same time, it is amplified to an appropriate size and applied to the control signal input terminal CI of the CPUs 8, 21, 27, thereby performing the functions as described above.

In addition to the above specific embodiments, various modifications may be made to the embodiments without departing from the spirit of the invention.

In the present invention, the CPU 8, 21, 27 is provided with additional function connecting connectors (7, 20), it is possible to install a sensor unit for performing other functions.

In addition, since the noise generated by the operation of the equipment mounted on the engine or other vehicle is generated on the power line 17, each CPU 8, 21, 27 is applied in series via the control signal input terminal CI. By parity checking the signal, it is possible to reduce errors and improve the reliability of the operation.

In this way, the present invention is not only capable of installation of a vehicle burglar alarm system, but also easy to install and economical advantages that can greatly save labor costs and materials required for its installation.

Furthermore, a sensor unit having a sensor 18 for detecting a desired state on the power supply line 17 can be expanded because any damage such as puncturing the vehicle for installing the burglar alarm system can be avoided. If you connect (25), you can purchase and install different types of sensors, such as trunk opening, at any time, so that you can diversify the functions.

Claims (1)

Received signal input terminal RF to which an output signal from the antenna 1, the high frequency amplifying circuit 2, the tuning circuit 3, the frequency converting circuit 4, and the intermediate frequency amplifying circuit 5 is input, and the sensor Control signal output terminal CO for outputting the ON / OFF control signal of the pulse type programmed with a unique code so as to control the unit 25 and the door lock unit 32 without malfunction. The control signal input terminal CI for receiving the pulse signal output from the unit 25 and the output signal are applied to the siren signal oscillator 11 and the siren signal amplification unit 12 by the detection signal from the sensor unit 25. A switch element connected between a CPU 8 provided with an alarm signal output terminal SO for operating the horn 13 and a power supply line 17 and a control signal input terminal CO of the CPU 8. Control signal transmission unit 9, the power line 17 and the control signal input A sensor input terminal (SI) to which the main device 16 is configured by a signal amplification unit 10 connected between the power terminals CI, and to which a sensor 18 for detecting a shock or theft applied to the vehicle is connected; A display output terminal L1 for generating an output for lighting the light emitting diode 24 for displaying an alarm operation state, and a control signal output terminal for outputting a detection signal by the sensor 18 to the main device 16 ( A CPU 21 having a control signal input terminal CI for receiving a control signal transmitted from a CO and a main device 16, and a control signal output terminal CO and a control signal input terminal CI thereof; The output is applied to the sensor unit 25 and the motor driving circuit by connecting the control signal transmitter 22 and the signal amplifier 23 having the same structure as the main device 16 between the power supply line 17 and the motor. The rotor 31 rotates forward and backward to activate or deactivate the door lock. A CPU 27 having a door lock output terminal DL and a door open output terminal DU for generating an output for receiving the control signal, and a control signal input terminal CI for receiving a control signal transmitted from the main device 16; Burglar alarm system, characterized in that consisting of a door lock unit (32) consisting of a signal amplification unit (28) connected between the control signal input terminal (CI) and the power line (17) thereof.