JPH0353134B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-theft device for a vehicle, and more particularly to an anti-theft device for a vehicle that prevents the engine from being started unless a predetermined registration operation is performed.

Conventionally, this type of device has been provided with a keyboard for performing a registration operation, and when a registration code that has been registered in advance is entered into the keyboard, the engine can then be started.

However, this device requires a keyboard as an operating means exclusively for registration operations, and has the problem that a predetermined amount of space is also required for its installation.

In addition, in view of the above problems,
There is an “automobile anti-theft device” shown in −38921,
Some existing automobiles are designed to automatically shift to a state in which the automobile engine can be started when switches installed in the automobile are operated in a predetermined order, and then the engine can be started by turning on a starter switch.

However, in this type of operation, it is often necessary to redo the operation midway due to a mistake in the operation procedure, etc., so in order to ensure that the operator can move on to the engine starting operation at the timing when the operator finishes the reoperation, It is necessary to provide a set timing for the end of the operation of these switches, and this point is not considered at all in the above-mentioned prior art.

The present invention was made in view of the above problems, and
It is an object of the present invention to provide a theft prevention device for a vehicle that is capable of detecting a registration operation by using the operation of an existing operation switch in the vehicle, and also of determining the end timing of the registration operation using the existing switch. This is the purpose.

In order to achieve the above object, as shown in FIG. a starter detector for detecting a closed state of a starter switch for driving a starter motor of the vehicle; and a starter detector for detecting an on state of a starter switch for driving a starter motor of the vehicle; Codes corresponding to the detecting means being detected are sequentially stored in a predetermined storage area, and in response to a new code being stored, previously stored codes are sequentially stored in an older storage area. a storage means for updating the shift; and when the starter detector detects the ON state of the starter switch, reads a predetermined number of codes stored in the storage means latest, and the predetermined number of codes are predetermined. and a determining means for determining whether or not the registered code matches the registered code; and when the determining means determines that the registered code matches the registered code, permitting power supply to the starter motor from the in-vehicle power supply via the starter switch. It is characterized by being equipped with a permission means.

The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is an overall configuration diagram showing one embodiment. In this FIG. 1, 1, 2, 3, 4, and 5 are an air conditioner detector, a light detector, a brake detector, a turn signal L detector, and a turn signal R detector, which constitute detection means, respectively.
L and R of the air conditioner switch, headlight switch, brake switch, and turn signal as operating parts for headlights, brakes, and turn signals.
It is connected to the switch path of the switch, detects the operation of these switches, and generates a detection signal. 6 is a starter switch, and 7 is a starter detector for detecting the on state of the starter switch 6.

8 is a microcomputer that executes digital arithmetic processing by software according to a predetermined control program, and includes a CPU, ROM, RAM,
It is composed of an I/O circuit section and a clock generation section as main parts, and is connected to a crystal resonator 9, as well as a stabilized power supply circuit 13 which is connected to an on-vehicle battery 10 via an ignition switch 11 and a normally closed switch 12. The device enters the operating state upon receiving a stabilized voltage from the source, performs arithmetic processing to prevent theft, and generates command signals such as a starter-on command, an alarm generation command, and a voice generation command.

Reference numeral 14 denotes a timer circuit, which is constantly supplied with power from the battery 10, receives a timer activation signal from the microcomputer 8, and operates the timer for a predetermined period of time, for example, one hour. It is something that opens up the world. Reference numeral 15 denotes an alarm device, which is constantly supplied with power from the battery 10 and receives an alarm generation command signal from the microcomputer 8 for a predetermined period of time, for example, 5 seconds, to notify the outside of the vehicle of a theft condition. is generated. Reference numeral 16 is a voice synthesis circuit which stores in advance voice data for generating voices for operation errors;
When receiving a voice generation command signal from the microcomputer 8, it performs voice synthesis using the voice data and generates an operation error voice from a speaker 17 installed in the vehicle interior. 18 is a drive circuit that receives a starter-on command from the microcomputer 8 and drives the normally open switch 19 to close, and 20 is a starter motor.

The operation of the above configuration will be explained with reference to the calculation flowchart shown in FIG.

Now, in a vehicle equipped with each of the components shown in Fig. 1, the ignition switch 1 is
1, the microcomputer 8 is supplied with a stabilized voltage from the on-vehicle battery 10 via the stabilized power supply circuit 13, and becomes operational. Then, the arithmetic processing is started from the start step 100 in FIG. 2, and the process proceeds to an initial setting step 101, where the registers, counters, latches, etc. in the microcomputer 8 are set to the initial state necessary for starting the arithmetic processing. For this initial setting, the number of times data N to be described later is set to 0, and the drive circuit 18
This includes the operation of generating a starter off command (maintaining the normally open switch 19 in an open state).

After this initial setting, the process proceeds to step 102, where it is determined whether or not a new detection signal is generated from any one of the detectors 1 to 5. If no detection signal is generated, the determination will be NO. Then, the process proceeds to step 103, where it is determined whether or not a detection signal is generated from the starter detector 7 by turning on the starter switch 6. If the detection signal is not generated, the determination becomes NO, and the process proceeds to step 102. Return to Then, when no new detection signals are generated from detectors 1-5 and 7, the arithmetic processing in steps 102-103 is repeated.

In this iterative calculation, each time a new detection signal is generated from one of detectors 1 to 5,
When reaching step 102, the determination becomes YES and the process proceeds to step 104. This step 10
In step 4, a code corresponding to the detector generating the detection signal is stored in a predetermined storage area in the RAM. Five storage areas are provided, and codes corresponding to the detectors are sequentially stored in the order in which the detection signals are generated. If another detection signal occurs after the detector code has been stored in all five storage areas, the current detector code will be stored in the newest storage area and the previous detector code will be stored. The code is sequentially shifted to the older storage area and rewritten and stored.

Thereafter, when the starter switch 6 is turned on and a detection signal is generated from the starter detector 7, the determination at step 103 becomes YES and the process proceeds to step 105. In this step 105
It is determined whether the codes of the five detectors stored in a predetermined area of the RAM match a registered code registered in advance, and if they match, the determination becomes YES. The process then proceeds to step 106, where a starter-on command signal is generated to the drive circuit 18. In response to this starter-on command signal, the drive circuit 18 closes the normally open switch 19, applies battery voltage from the on-vehicle battery 10 to the starter motor 20 via the starter switch 6 and the normally open switch 19, and starts the engine. Further, after step 106, the process proceeds to step 107, in which various types of control in the vehicle, such as arithmetic processing for a fuel injection device (sensors and actuators are not shown), are repeatedly executed.

That is, after turning on the ignition switch 11, each switch for the air conditioner, headlight, brake, and turn signal is operated according to the pre-registered operation order, and then, when the starter switch 6 is closed, the information stored in the RAM is Since the code of the detector matches the registration code registered in advance, a starter ON command signal is issued to the drive circuit 18, and as a result, the normally open switch 19 is turned on.
is closed and the starter motor 20 comes into operation.

On the other hand, after the ignition switch 11 is turned on, the air conditioner, headlight, brake, and blinker switches are operated in the wrong order, and then the starter switch 6 is closed. At step 105, the code of the detector stored in the RAM and the registration code registered in advance do not match, so the determination is NO, and the process proceeds to step 108, where 1 is added to the number data N. Update. At this time, if it is the first arrival, since the number data N is set to 0 in the initial setting, the added and updated number data N becomes 1. Therefore, the next step 109, which determines whether the value of the number of times data N is 3 or more, becomes NO, and the process proceeds to step 110, where a signal for commanding the operation error sound generation is sent to the speech synthesis circuit 16. do. As a result, the sound synthesis circuit 16 synthesizes the sound, and the speaker 17 generates the sound of the operation error inside the vehicle.

Thereafter, if the switch operations are performed again in the wrong order, the number data N that is added and updated becomes 2 in step 108. Therefore, the next step 109 makes a negative determination, and step 1
At step 10, a voice command signal indicating an operation error is generated again to the voice synthesis circuit 16. As a result, the speaker 17 generates the operation error sound again.

Furthermore, if the switch operations are performed in the wrong order, the number of times data N to be added and updated in step 108 becomes 3, so the next step 10
The judgment of 9 becomes YES. And step 11
Step 1 generates an alarm generation command signal to the alarm device 15, and step 112 generates a timer operation command signal to the timer circuit 14. As a result, the alarm device 15 activates for 5 seconds.
An alarm is generated to notify the outside of the vehicle of the theft, and the timer circuit 14 operates a timer to open the normally closed switch 12 for one hour. Therefore, power is not supplied to the microcomputer 8 for one hour, and the engine cannot be started during this time.

In the above embodiment, the switches for performing the registration operation are switches for the air conditioner, headlights, brakes, and turn signals, but they may also include switches for many other devices such as wipers. It may be a switch that detects the 1st to 4th gear positions of the shift lever. Also,
When a switch is operated to perform this registration operation, the original operation for the switch operation, such as turning on a headlight in response to an operation of turning on a light switch, may not be performed.

Further, although the system shown above generates an alarm outside the vehicle when an operation error occurs three times in a row, it may also sound a horn.

Further, in order to allow the user to freely change the registration code for determining the registration operation, the operation order of the switches for the registration operation may be set when operating a hidden switch provided at a predetermined location. In this case, in order to allow the driver to properly set the registration code, the hidden switch may be operated only when the vehicle is being driven.

As described above, in the present invention, in the anti-theft device for a vehicle, a plurality of operation sections installed for operating specific operating devices in the vehicle are used for setting the registration code. This has the excellent effect of eliminating the need for a dedicated operation means for setting the registration code and eliminating the installation space for it.

Furthermore, in the present invention, an operation for indicating the end timing of the registration operation is provided, and since this operation is performed using an existing starter switch, the set operation and the engine starting operation can be combined. This has the excellent effect of reducing the number of switch operations required from the registration operation to starting the engine, and shortening the time from the registration operation to the engine start.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention;
FIG. 2 is a calculation flowchart showing the calculation processing of the microcomputer in FIG. 1, and FIG. 3 is a configuration diagram showing the configuration of the present invention. 1...Air conditioner detector, 2...Light detector,
3...Brake detector, 4...Blinker L detector, 5...Blinker R detector, 6...Starter switch, 8...Microcomputer, 11...
...Ignition switch.

Claims (1)

[Scope of Claims] 1. A plurality of detection means for detecting the operation state of each operation switch for a plurality of operation switches set for operating a specific operation device in the vehicle, and driving a starter motor of the vehicle. a starter detector for detecting the on state of a starter switch for the purpose of detecting a starter switch; and a starter detector for detecting an operation of a corresponding operation switch by any one of the plurality of detection means, which generates a code corresponding to the detection means detecting the operation. a storage means for sequentially storing in a predetermined storage area, the storage means for updating the storage of a new code by sequentially shifting previously stored codes to an older storage area; When the starter detector detects the on state of the starter switch, it reads out a predetermined number of codes stored most recently in the storage means, and checks whether or not the predetermined number of codes match a predetermined registered code. The present invention is characterized by comprising a determining means for determining, and a permitting means for permitting power supply to the starter motor from the in-vehicle power supply via the starter switch when the determining means determines that the code matches the registration code. Anti-theft device for vehicles.