JPS58183336A - Drive-away preventing device for automobile - Google Patents

Abstract

PURPOSE:To prevent an automobile from being driven away, by issueing an alarm when it is detected that the automobile is traveled by a distance of not shorter than a predetermined distance at night. CONSTITUTION:A microcomputer 1 is connected with a time setter 4 and a pulse generator 5, and is inputted with a set time and a number of revolutions of wheels. The microcomputer 1 operates a buzzer 7 through a buzzer-controlling circuit 6 when the vehicle is traveled by a distance of not shorter than a predetermined distance after the set time. When the vehicle is driven away at night or in other similar occasion, an alarm is issued when the vehicle is traveled by the predetermined distance. Accordingly, the vehicle can be prevented from being driven away.

Description

[Detailed Description of the Invention] This invention prevents cars from running away! ! In particular, the present invention relates to a vehicle carry-away prevention device that detects and notifies a predetermined travel distance of a vehicle.

Conventional automobiles have not been provided with any special means for detecting and notifying that the vehicle has been stolen.

Therefore, for example, even if a car was driven in a C-slide by a samurai, neither the owner of the car nor a third party would notice.

This invention was made to eliminate such drawbacks, and provides an automobile that can prevent a car from being taken away by detecting the car being taken away and notifying the result with an alarm @. The purpose is to prevent people from carrying away their belongings.

According to one aspect of the present invention, a time setting means, a vehicle mileage detection means, an alarm sound generation means, and a control means are provided.
Furthermore, this device is designed to generate a warning sound if the vehicle is driven for more than a predetermined distance after a set time has elapsed.

Embodiments of the present invention will be described below based on the drawings.

FIG. 11 is a block diagram showing an embodiment of the present invention. This embodiment has a microcomputer 1, which is a central processing unit (hereinafter referred to as C
(referred to as a PU) 2 and a memory 3 connected thereto. The CPU 2 includes a time setting device 4. A pulse generator 5 and a buzzer control circuit 6 are connected. Buzzer control circuit 6
A buzzer 7 is connected to.

The memory 3 stores operating programs for the CPU 2 and other information. The CPU 2 stores the operation program in the memory (3) and performs the operations shown in the flowcharts of FIGS. 2 and 3. Pulse generation 1!
5Lt, in the state where the active 1@A signal is input from the CPU 2, a number of pulse signals corresponding to the number of rotations of the wheels (or center shaft) of the automobile are generated. In this case, the rotation direction of the wheels may be either the traveling direction of the vehicle or the forward traveling direction. The buzzer control circuit 6 controls the buzzer 7 to turn on when the alarm signal B is input while the active signal A is being input from the CPU 2. The buzzer 7 emits an alarm sound when turned on. The time setter 4 is
Pulse generation from CPIJ2! 15 and the buzzer control circuit 6 to output the active signal A. Note that the pulse generator 5 and the buzzer III are used instead of the active signal A.
Prohibition a! that prohibits the operation of IllG@Route 6! The prohibition signal may be stopped when the set vI system is reached. The overall operation of FIG. 1 will be described below with reference to FIG. 2.

FIG. 12 is a diagram for explaining the operation of the embodiment shown in FIG.
- Chisetoguaruru. First, in step 81, the time setter 4 sets the pulse generator 5 and the buzzer control circuit 6.
Set the tense to turn on (for example, 98I gray).

This causes a pulse to be generated from CPU 2! 15 and the buzzer control circuit 6 are stopped, the pulse generator 5 is turned off in step 82, and the buzzer control circuit 6 is turned off in step 83. As a result, buzzer 7 will not turn on until the set tense is reached.
The car can be driven normally. Step S4
At , it is determined whether or not it is the set time. If the set time has come, the process advances to step S5, and if it is not the set time, the process advances to step S5.
Return to 2. If the set time is reached, a pulse is generated from CPU2!
Active signal MA is output to I5 and buzzer control circuit 6, pulse generator 5 is turned on in step S5, and buzzer control circuit 6 is turned on in step S86. In step S7, it is determined whether or not a pulse from the pulse generator 5 is being input, and if so, the process advances to step S8. The fact that a pulse is being input means that the wheels are rotating, that is, the car is running. In step S8, the number of pulses is counted, and in step S9, the number N of pulses is stored in the memory 3 while being updated sequentially. In step 310, the number of pulses N is converted to distance traveled. Note that the memory 3 stores in advance a set distance at which the buzzer 7 is turned on (for example, 10 cm). In step 311, it is determined whether the traveling distance (L) is equal to or greater than the set distance, and if it is equal to or greater than setter 1, the process proceeds to step 312, and if it is not the set distance, the process returns to step 87. In step 312, CP
An alarm signal B is output from U2 to the buzzer circuit 6, the buzzer S circuit 6 turns on the buzzer 7, and the buzzer 7 emits an alarm sound. In this way, even if a car is secretly driven at night, this will be detected and an alarm will sound. The purpose of setting the setting device is to prevent the buzzer 7 from sounding when the owner of the vehicle wants to move the vehicle slightly at night.

FIG. 3 is a flowchart for explaining another operation of the embodiment shown in FIG. Here, at a certain time during the night II (
For example, within a certain distance (for example, 10 seconds)
) The above is an attempt to detect and notify the state in which the vehicle is traveling. If the inside of the car is stolen, the car will be
By detecting this, the vehicle can be run at a high speed.
This is intended to be distinguished from the year-round operation of a car owner.

The steps up to step S7 are the same as in the case of FIG.

In step S7, if it is determined that a pulse is being input, the process proceeds to step S13, where a timer (set time is, for example, 10 seconds) built into the microcomputer 1 is activated. Step 314 to Step S
The operation of 16 is similar to that in FIG. Step 3
At step 17, it is determined whether or not the timer is up. If the time is up, the process advances to step S18; if not, the process returns to step S14. In step 818, it is determined whether the travel distance has exceeded the setting button 1111 (for example, 100 m), and if the distance has exceeded the set distance, the process proceeds to step 319, where the CPU
2 outputs an alarm signal B to the buzzer control W circuit 6, and the buzzer 7 is turned on to emit an alarm sound.

If the setting button is not pressed, the process advances to step S20, the timer is reset, and then the process returns to step S87.

The same operation is repeated thereafter. In this way, you can
III* is more than a constant speed injection (in the example of the above numerical value, about 40k
This corresponds to more than m. ), this will be detected and an alarm will sound. Here, the reason for determining the above-mentioned fixed time and fixed distance is to prevent the buzzer 7 from sounding when driving at a low speed (for example, 40 km/h or less) at night due to the needs of the vehicle owner. It's for a reason.

As described above, according to the present invention, after setting 111 (
For example, if a vehicle is driven for a predetermined distance or more during nighttime hours, an alarm can be emitted to notify the user of this, thereby preventing the vehicle from being stolen away.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the embodiment shown in FIG. FIG. 3 is a flowchart for explaining another operation of the embodiment shown in FIG. In the figure, 1 is a microcomputer, 4 is a time setter, 5 is a pulse generator, 6 is a buzzer control circuit, and 7 is a buzzer. Patent applicant Tachibmm Co., Ltd. Souj Zuu 2

Claims (3)

[Claims] (1) Time setting means that outputs a sub-hour signal when a set time has arrived; Mileage detection means that detects the mileage of the vehicle; Alarm sound generation means that generates an alarm sound; The time signal and control means for controlling the alarm sound generating means in response to the output from the mileage detecting means; A device for preventing a vehicle from being stolen away from the vehicle, which drives the alarm sound generating means when the vehicle is stolen. (2) A patent in which the distance detecting means includes: a pulse generating means that generates a pulse signal according to the number of rotations of the wheels of the automobile; and a converting means that converts the pulse signal into a traveling distance of the automobile. Claim No. 111&l! Comparison of car theft prevention device. (3) The vehicle escape prevention device according to item 2 of the scope of WI requirements, wherein the VI setting means, the control means, and the conversion means are ficrocontrollers.