CN2243414Y - Leadless digital coded anti-steal device - Google Patents

Abstract

The utility model relates to a leadless digital coded anti-steal device, which uses a signal network to transmit and receive signals between a controlling unit and receiving units with the existing lead. The device can be in ready state or halted state, automatically going into the ready state when an ignition key is turned off; when a vehicle or a ship is started but the device is not stopped before, all units start working after a delay; when the device is in halted state, the controlling unit transmits a single code, the receiving units receive the code and stop executing the function. So, even if the power supply is cut, all units keep working and executing each function.

Description

No pin count word code anti-joyride device

The utility model relates to a kind of leaded electric anti-thief device of automobile that utilizes.

Automobile alarm equipment generally includes an igniting locking device and an annunciator.For most of caution systems, what need most is the position of hidden these devices, finds and destroy its work to prevent stealer.

Regrettably, these devices are installed, setter must be laid ew line with its each parts are connected with each other (for example U.S. Pat-4792792, US-4992670 and US-5061915).This class outside lead has become the found boot flag of these device concealed locations.It is very difficult or possible to lay extra lead-in wire.Outside lead also is a weak link of caution system, because the crucial lead-in wire of some of the system of cut-out just can make many warning functions malfunctioning.Usually, the controller that caution system is used is a sizable box, and it has many lead-in wires that controller and various sensor and actuator are coupled together.For conventional device, its signal sends with analog form or " ON/OFF " form.In order to keep the integraty of this device of the prior art, also must as hiding the lead-in wire of guiding on the controller, controller be hidden, will make anti-joyride device malfunctioning because removed additional lead-in wire.

The where the shoe pinches that goes between in power actuated vehicle is that for example: (1) goes between between engine room and passenger cabin; (2) electric door lock or electric window function are introduced in the caution system.Lead to be introduced passenger cabin by engine room, just must pass a duct lead-in wire.Owing to can introduce a large amount of smells and noise, do not allow to go between and introduce passenger cabin, in addition this duct still dislikes not enough for its spare space of lead-in wire that caution system is installed from engine room.For the control line of electric door lock and electric window is installed, also must pulls down car door and then it is loaded onto.

The purpose of this utility model is to provide a kind of simple, inexpensive, effective and failure-free anti-joyride device, and this anti-joyride device utilizes automobile former leaded and without outside lead, so that improve its reliability.

The utility model one most preferred embodiment has several digital parts, and to form a digital control system, these parts are attached on the parts (as loudspeaker, door lock etc.) that have now in the environment.The parts that these are new are connected on the most close lead cable part of existing automobile lead-in wire network, with realize with other elements of caution system between communicate by letter, and provide the power supply supply of necessity, and need not in whole vehicle, spread line in addition to each parts.

Each parts of this anti-joyride device or be in halted state (first kind of state) perhaps are in dead work state (second kind of state), and when ignition key is transferred to when cutting off by connection, this device proper automatically changes to readiness.If vehicle launch and do not allow device quit work, then delay time of its programming in the past each parts of back all start working.When device switches to halted state by readiness at every turn, just send a single numerical code (code word) that is included in the ID sign indicating number (heading code) to this digital control system.This code word has protected device to make it the interference of avoiding unnecessary, because this code word signal network by caution system during halted state only.This makes when needed, is cut off under the situation even be loaded with the lead-in wire (being generally power lead) of code word in the security system network when device is in readiness, and the digital parts in the anti-joyride device are also started working and finished separately function.

The characteristics of this anti-joyride device comprise has utilized existing lead system, this helps the installation of warning device, thereby provide one to be difficult to be made its out-of-work design plan, wherein used the out-of-work technology of each parts that makes system with a numerical code by stealer destruction.Other characteristics of the present utility model and advantage will be tangible for a person skilled in the art after having consulted following accompanying drawing and specification sheets.

Fig. 1 illustrates an automobile, the major part of the caution system that wherein drawn;

Fig. 2 is each block diagram of caution system;

Fig. 3 is the workflow diagram of caution system;

Fig. 4 is the signal flow graph of caution system;

Fig. 5 expresses the code word that is used for caution system and how to constitute;

Fig. 6 is the block scheme of control unit;

Fig. 7 is the circuit diagram of control unit;

Fig. 8 is the block scheme of remote digital receptor;

Fig. 9 is the circuit diagram of remote digital receptor;

Figure 10 is a sequential chart.In order to reduce the interference between the transducing signal of transporting to CPU (central processing unit) 115, each transmitter is sent its data at a predetermined pitch time.These pitch times are all different for each sensor, thereby reduced overlapping between the data of sending from different sensors effectively.As seen from the figure, each string signal wherein from a signal of each transmitter, all has such a period of time at interval, all begins to send at synchronization even this time gap has guaranteed all signals, also can not cause interference overlapping to second signal.

Fig. 1 illustrates an automobile 10, the major part of caution system 100 has wherein drawn, in this most preferred embodiment, the caution system 100 that is placed in the automobile 10 has the lead-in wire 105 that just has in original automobile, and this system comprises a keyboard 110, digital control unit or CPU115, digital igniting block system relay 120, a digital horn relay 130 and a digital self-powered annunciator 140.

Keyboard 110 is located at the place near driver door.The CPU115 of caution system 100 is placed in the vehicle 10 Anywhere.CPU115 utilizes the signal network set up to be connected with several devices on every side through existing lead-in wire 105 (making its channel as caution system 100).

This signal network makes the signal between each parts of caution system 100 send along existing lead-in wire.CPU115 sends data and control information on peripheral devices with a specific frequency, and sensor sends back to CPU115 with second kind of frequency with data.

The peripheral devices of caution system 100 be with vehicle 10 in standard equipment combine.These peripheral devices comprise locking device and annunciator (for example digital igniting block system relay 120, digital horn relay 130 and digital self-powered annunciator 140 etc.).And then, these optional features are linked on the existing lead-in wire 105 in a place the most hidden, thereby led to described network to warn necessity communication of network.Peripheral devices is some digital parts, and digit receiver is housed, and they comprise existing apparatus (for example loudspeaker of car 10) or add-on device (as annunciator).

See that by mode of operation caution system 100 is a kind of digital systems.CPU115 receives from everywhere, comprises the incoming signal that can indicate destruction to take place of car door, baffle plate, trunk and elsewhere that sensor is housed.A kind of state (the dead work state or the state that quits work) of CPU115 decision caution system 100 sends instruction then and finishes corresponding specific function.

Fig. 2 is each block diagram of caution system 100.Caution system 100 comprises keyboard 110, CPU115, has delay selection button 150, LED (light-emitting diode) 160 and the digital igniting block system relay 120 of study sign indicating number button 170, the digital self-powered annunciator 140 that has the digital horn relay 130 of delay selection button 180, LED190 and study sign indicating number button 200 and have delay selection button 205, LED210 and study sign indicating number button 215.

Directly send manual incoming signal through keyboard 110 to CPU115.Transmit a single numerical code signal (code word) to other digital parts (being digital igniting block system relay 120, digital polse formula horn relay 130 and digital self-powered annunciator 140) from CPU115 supply cable in the existing lead system 105 through car 10.

Because the existing lead-in wire 105 of car 10 is ready-made, so setter need not be laid ew line again between CPU115 and other digital relays and annunciator 120,130 and 140.In addition, relay and annunciator 120,130 and 140 are easy to be hidden, and stealer is difficult to find and destroy them.The existing lead-in wire 105 of car 10 also is used for digital igniting block system relay 120 is connected to (1) high-tension coil, (2) oil pump or (3) ignition system, and digital horn relay 130 is connected on the horn switch.

Delay selection button 150, LED160 and study sign indicating number button 170 are housed on the digital igniting block system relay 120, and they are obvious appreciiables on these digital igniting block system relay 120 these parts.Digital horn relay 130 and digital self-powered annunciator 140 also have similar characteristics, promptly it delay selection button 180 and 205 that comprises, LED119 and 210 and a study sign indicating number button 200 and 215 all be appreciiable.Study sign indicating number button 170,200 and 215 receives needed numerical code from CPU115, and this process will be described in detail below.

In order to stop car thief to utilize the control unit of a caution system to go to stop the digital parts 120,130 of another caution system and 140 effect, in the CPU115 of caution system 100, used a kind of triangular web numerical code (a kind of ID sign indicating number).This sign indicating number just is located at CPU115 by an EEPROM (electrically erasable programmable ROM) and has been suffered during making.

Digital parts 120,130 and 140 to caution system are programmed, and make it to have identical sign indicating number after installing.This be push when sending the code word of caution system 100 at CPU115 each study sign indicating number button on each digital parts 120,130 and 140 reach to.So, be imported into from the ID sign indicating number of code word in each digital parts 120,130 and a memory device of 140 of caution system.Whenever ignition key is changed to when logical by disconnected, digital parts 120,130 and 140 just enter mode of operation, the ID sign indicating number that until receive a memory device with digital parts 120,130 and 140 from CPU115, stores be consistent yard till.This method can prevent that stealer from destroying the work of caution system by damage CPU115 when caution system is worked.Unless just CPU115 sends an actv. stop code, otherwise all components of system as directed are all in work.

Delay selection button 150,180 and 205 can manually be set, so that still can delay working after the dead work state of caution system 100 is destroyed 0,1,3 or 9 minute.These delay selection buttons are just set before installing usually.

When caution system 100 was in readiness, a light-emitting diode on the keyboard 110 is flicker lentamente just.In order to stop the work of caution system 100, must be passed in the caution system 100 by the digital stop code of keyboard 110 with manual mode with a 4-6 position.This 4-6 bit digital stop code can be programmed into it in caution system 100 by the user.The start a car 10 if there is not stop code, then automobile is just motionless, and will sound at predetermined delay time loudspeaker later and annunciator.If in preceding 12 times are attempted, not have inspection then during to the correct order of the numeral that makes it to stop, caution system 100 just pins from keyboard 110, no longer receive more sign indicating number from keyboard 110, until ignition key by logical change to break till.Do not stopped the work of caution system 100 earlier if vehicle 10 starts, then the light-emitting diode on the keyboard 110 just flashes fast, and sends beep sound, to remind motorist's caution system 100 also in work.In addition, if the power lead of CPU115 is dismantled or CPU115 itself catches hell, then all digital relays 120,130 and 140 all no longer receive this required stop code, so, when car 10 was started or destruction occurs, function separately will be worked and finish to these parts.

Fig. 3 is the workflow diagram of caution system 100.Workflow is from step 220.Determine in step 220 whether vehicle 10 starts (ignition key becomes logical by breaking), perhaps whether receive the incoming signal of the car door that has input pickup, baffle plate, trunk or elsewhere in the comfortable car 10.If car 10 does not start and harassed, then system 100 returns step 220.If car 10 is started or harassed, then system 100 enters step 221.Determine in step 221 whether system is in readiness.If system 100 is not at readiness, then system 100 returns step 220.If system 100 is in readiness, then it enters step 222.In step 222, determined whether stop code input.If stop code is not imported, then digital parts are started working at its delay time separately later, promptly enter step 223, till correct stop code input is arranged.If stop code is imported, determine in step 224 that then this stop code that enters is correct stop code.If a stop code mal that enters has then determined whether to enter in succession more than 12 off-square stop codes in step 225.Enter if only be less than 12 off-square stop codes, then system 100 returns step 222; Enter if having more than 12 off-square stop codes, then (caution system 100 does not receive the more sign indicating number from keyboard to system's 100 own just pinnings (step 226), until ignition key by logical become disconnected), and digital parts are in its delay time separately start working later (step 223).If the input of correct stop code is arranged, system 100 oneself just quit work (step 227).In step 228, determine ignition key whether by logical become disconnected.If ignition key does not become disconnectedly from logical, then system 100 returns step 228; If ignition key becomes disconnectedly by logical, then system 100 is in readiness, promptly enters step 229.

Fig. 4 is the signal flow graph of caution system 100.This diagram of circuit is from caution decision circuit 250, and this decision circuit determines when to annunciator and/or locking device 280 and sends a signal to stop its work.Caution decision circuit 250 is sent analog signal 285 and is given a code word generator 255, and code word wherein is to produce in the ID sign indicating number from the nonvolatile memory of the computing machine that is stored in caution system 100.This code word reaches frequency modulator 260 with the signal 290 of binary mode then, and the signal with this binary code converts frequency modulation (" FM ") signal z295 to thus.In FM amplifier 265, this FM signal 295 amplified again and delivered on the existing lead-in wire 105, so this signal just can be transferred on annunciator and/or the locking device and be received.In annunciator and/or locking device 280 inside, frequency demodulator 270 makes the FM signal demodulation on 105 lines that receive, and it is gone back to the signal 305 of binary mode, in the defeated then firmly codeword decoding device 275.Decoder 275 takes out the ID sign indicating number and the ID sign indicating number in the nonvolatile memory of itself and computing machine is compared from the binary code signal 305 that receives, when the two in strict conformity with the time, just send an analog signal 310 annunciator and/or locking device 280 quit work.

Fig. 5 illustrates the code word 330 that is used for caution system 100 and how to constitute.The ID sign indicating number of each caution system 100 all is stored in the non-volatile electrically erasable programmable ROM (" EEPROM ") of each parts of caution system 100.Even this makes that its ID sign indicating number can not lost yet when outage.ID sign indicating number 315 and X value (it is one and is preset as 1 factor) promptly are programmed among the EEPROM of CPU115 unit during manufacture.Calculate a 8-bit check code y or f (x) with a formula with X, wherein X is former equals 1, just increases by 1 (X+1) and caution system 100 changes to its value of halted state from readiness at every turn.ID sign indicating number 315 has just formed code word 330 altogether with x and y.After the digital parts 120,130 of each of caution system and one of 140 are received code word 330, only under the following conditions it is become an actv. stop code: (1) is consistent with ID sign indicating number 315, (2) new X is greater than the X in the memory device, and the f that calculate by described formula (3) (x) is identical with the y value of taking out from the code word 330 that receives.So just can wait and when caution system 100 quits work, remove to learn a coding, and then go afterwards to attempt to stop the work of caution system 100 and vehicle 10 is stolen with this old sign indicating number with a ccasual stop code the personnel on the parking area of going to prevent.

Fig. 6 is the block scheme of control unit 461.The radical function of control unit 461 is to go to transmit signal so that stop code is delivered on each discrete part that constitutes caution system 100 with the existing lead-in wire 105 of encoding.Control unit 461 comprises code generator 255, frequency modulator 260 and FM amplifier 265.This unit is made up of a MPU (micro controller system) 462, EEPROM device 464, two crystal controlled oscillators 466 and 468, frequency selectors 470, terminal amplifier 472, an output filtering/matching unit 474 and a power supply 478.As previously mentioned, caution decision circuit 476 is convenient to determine that caution system 100 is to be in readiness or to be in halted state.Code word 215 only produces when caution system 100 is in halted state.In addition, again the code word of Xing Chenging only transmits under out-of-work state, if so that caution system 100 under readiness destroyed or be de-energized after, other all caution parts are still finished function separately in work, because received the coding of new generation during their former halted states.

When MPU 462 from the caution decision circuit when receiving an ON (connection) signal, MPU462 just reads stop code from EEPROM device 464, and it is delivered on two the control input end FC1 and FC2 of frequency selector 470.In frequency selector 470, two oscillation frequency Fx of signal selection on FC1 and the FC2 and Fy are as the output of finder.This output signal be exaggerated and filtering/coupling after be fed on the power supply lead wire of caution system 100.Vehicle 10 has several noise sources, as oil pump, electrical generator etc., can produce very serious disturbance.Signal after amplifying is very strong, be enough to receive for the miscellaneous part of caution system 100, but it again can be by force to being sent to the space.

Fig. 7 is the circuit diagram of control unit 461.In power supply 478,12 volts of voltages of a direct current are added on one 12 volts to 5 volts the voltage stabilizer, for the usefulness of control unit 461.Diode D2 is used for preventing that reverse voltage from causing damage to this unit.Filter is made up of inducer L1, cond C6 and C10, with the power-supply fluctuation on the filter out power line.Integrated circuit U5 (available LM7805 or the device equivalent with it) drops to 5 volts with voltage, electricity consumption container C then 5 and the further filtering of C4.

5 volts of voltages that produced offer MPU462, oscillator 466 and 468 and frequency selector 470.Integrated circuit U1 among the MPU462 has the habitual software of dress in, and comes timing by a scaling circuit of being made up of the crystal Xtal 1 in first oscillator 466 and cond C1 and C2.The frequency of crystal Xtal 1 also is used as above-mentioned Fx frequency.Another crystal controlled oscillator 468 is made of Schmidt trigger U4A, crystal Xtal 2, resistor R 1 and cond C8.Resistor R 1 and cond C8 in second oscillator 468 play the delay retroactive effect, so that crystal can force oscillator that one oscillation frequency of determining is arranged.Resistor R 2 and diode D1 are used for making output to have 50% Occupation efficiency (duty cycle).

MPU462 retrieves ID sign indicating number and incremental code X after receiving signal from caution decision circuit 476 from EEPROM device 464.Incremental code X increases by 1 more then, and is stored into again in the EEPROM device 464 of control unit 461.So MPU462 calculates 8-bit check code Y with ID sign indicating number and incremental code X, sends stop code (code word) to the FC1 that is connected to frequency selector 470 of MPU and two output lines on the FC2 then.Three kinds of states in four kinds of different conditions on these two output lines are used to select Fx, Fy and OFF (disconnection), and left a kind of state need not on these two lines.

Frequency selector 470 is formed with door U3A and U3B by frequency Fx and Fy being carried out two of gate, and control signal through FC1 and FC2 line from MPU462.Utilize two diode D3 and D4 make these two with the output of door altogether, through resistor R 3 they are sent into amplifier then.Described amplifier is to be formed by the NPN transistor Q1 with on-off mode work.Transistorized collecting electrode is connected to the resonator T1 of transformer type, and receives on the direct supply lead-in wire through its secondary winding (comprising cond C9 and C7).Capacitor C 9 is used to intercept vdc, and C7 is as make the resonator frequency conversion when controlling the frequency of resonator.

Fig. 8 is the block scheme of remote digital receptor 599.Digit receiver 599 comprises frequency demodulator 270 and decoder 275, and it receives the signal that control unit 461 is sent here by vehicle 10.Same power supply had both used also for control unit 461 and had used for digit receiver 599.In the present embodiment, digit receiver 599 is placed on the inside of digital igniting block system relay 120, digital horn relay 130 and the digital self-powered annunciator 140 of caution system 100.Remote digital coding receptor 599 receive from control unit 461 correctly stop the ID sign indicating number time just stop security personnel's effect of digital parts.This situation appears at before main power source is cut off.Have only when receiving an effective code, remote digital coding receptor just makes its unit quit work.

Supply the voltage of the direct supply 625 of FM receptor and demoder 600 usefulness must drop to 9 volts.Again its 9 volts of voltages are reduced to 5 volts, for the usefulness of MPU605, EEPROM610 and level buffer amplifier 615.After energising starts, MPU605 will enter by the programme controlled monitoring pattern of in house software.FM receptor and demoder 600 are constantly deciphered the signal from power lead, and these signals are delivered in the level buffer amplifier, and this amplifier increases signal amplitude, and adjust these signals and make it to be suitable for monitoring with MPU605.MPU605 monitors this digital input signals continuously, and carries out verification, to reach the correct coupling of stop code.In case the stop code of identifying, MPU605 just connects its output relay 620, and enters locked state, till main power source is turned off.But, must do special processing for the work of annunciator, because there is the problem that annunciator after the power on circuitry can sounding.Therefore, cooperate its work and postponed for 5 times in second, annunciator wouldn't be worked after the energising beginning.Within these 5 seconds, control unit 461 has the enough time to go to send stop code to disconnect annunciator.

Fig. 9 is the circuit diagram of remote digital receptor 599.12-volt dc power supply is by diode D100 input, and D100 plays the effect of reverse polarity protection's device.Carry out filtering with inducer LI00 and cond C100 then, filtered power supply is received through resistor R 100 on 9 volts the Zener diode D101.FM receptor and demoder 600 will be with these 9 volts of power supplys.Drop to 5 volts through integrated circuit U100 (available 78L05 or similar model) and cond C102 and C103 again with 9 volts, with power supply as level buffer amplifier 615, MPU605 and EEPROM610.

FM receptor and demoder 600 are formed by an integrated circuit U104 (available AN5732), in order to the FM signal on its input end is amplified and demodulation.Receive on the input ceramic filter CF100 through cond C109 and resistor R 114 from the FM signal on direct supply (12 volts) lead-in wire, filtered signal leads on the pin 1 of integrated circuit U104, and the magnification factor of U104 is by the resistor R 115 and the cond C110 control that are connected on the pin 2.Select by being connected on the ceramic filter CF101 between pin 5 and 6 and the frequency of 116 pairs of demoders of resistor R.Be fed on next function block 615 by the demodulated low frequency signal that obtains on the pin 7.The low-pass filter of low frequency signal on demoder the 7th pin through being formed by resistor R 113, R112 and cond C108 received on the pin 2 of amplifier U103A through resistor R 111 again.The magnification factor of amplifier U103A is by the recently setting of resistor R 109 with R111, and cond C106 is used to reduce high fdrequency component.The resistor R 110 at pin 3 places and cond C107 are in order to the DC level of compensation from demoder.The amplifying signal at pin 1 place is on cond C105 receives in order to the Schmidt trigger UI03B that carries out digital voltage output.Resistor R 106 and R107 form a bleeder, and provide reference level through resistor R 108 for Schmidt trigger.Obtain to lag behind through resistor R 104 and R105 circuit.The output of this circuit switches in the incoming signal that depends on the high or low position on the pin 6.The digital signal of output is led on the MPU605 on the pin 7.

MPU605 is provided with internal clocking, and it is regularly determined by a resistance that is connected between pin Xin and the Xout.After the energising, MPU605 resets by the cond C104 on the pin that resets that is connected in MPU605.After resetting, MPU605 just carries out the instruction repertorie of its storage.System will transport in the register from ID sign indicating number and the incremental code X of EEPROM610 then.Thereafter incremental code increases by 1, calculates check code Y simultaneously.Then MPU605 enters carry out the verification stage of verification from the data of level buffer amplifier 615.When if the internal memory sign indicating number that identifies 40 is consistent with received sign indicating number, incremental code is just got back among the EEPROM610 by storage, so a pin of MPU output just enters a high position, thereby enters conducting state through voltage grading resistor R103 and R102 driving N PN transistor Q100.Then this NPN transistor drives output relay K100 again, makes it institute's bonded assembly load (as oil pump, starter, high-tension coil etc.) is powered.Last MPU605 enters locked state, and keeps output relay in " ON (connection) " position, till main power source is turned off.

Figure 10 is a sequential chart.In order to reduce the interference between the transducing signal of transporting to CPU115, each transmitter is sent its data at a predetermined pitch time.These pitch times are all different for each sensor, thereby reduced overlapping between the data of sending from different sensors effectively.As seen from the figure, each string signal wherein from a signal of each transmitter, all has such a period of time at interval, all begins to send at synchronization even this time gap has guaranteed all signals, also can not cause interference overlapping to second signal.For the system of an economy, its CPU only comprises a transmitter and a receptor, and miscellaneous part then only comprises a transmitter or a receptor.

Claims (1)

1. do not have pin count word code anti-joyride device, comprising:

A digital control system;

A plurality of digital parts; With

Make described control system and described a plurality of digital parts bonded assembly signal network, this signal network is made up of existing lead-in wire on the car;

It is characterized in that:

(1) described digital control system comprises one group of caution decision circuit (250,476), a single code generator (255), a frequency modulator (260) and frequency modulation amplifier (265,472), wherein

(a) described single code generator (255) is made up of a micro controller system (462) and an electrically erasable programmable ROM (EEPROM, 464), and this single code generator is connected with described caution decision circuit (476);

(b) described frequency modulator (260) is made up of two oscillators (466,468) and a frequency selector (470), and this frequency modulator is connected with described single code generator (255);

(c) described frequency modulation amplifier (472) comprises a power amplifying transistor (Q1) and a coupling transformer (T1), and this frequency modulation amplifier is connected with the frequency selector (470) of described frequency modulator;

(2) described digital parts comprise a FM receptor and demoder (270,600), a level buffer amplifier (615), a single code decoder (275), a relay (620), alarm element or locking element (280), wherein

(a) described FM receptor and demoder (270,600) are connected with described power lead;

(b) described level buffer amplifier (615) connects with described FM receptor and demoder (270,600);

(c) described single code decoder (275) is made up of a micro controller system (605) and an electrically erasable programmable ROM (EEPROM, 610), and this single code decoder is connected with described level buffer amplifier (615);

(d) described relay (620) is connected with described single code decoder (275).

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