JP2002347581A - On board burglar alarm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on board burglar alarm in which there is no blind spot of an infrared ray detecting for not only a driver's seat and a passenger's seat but also rear seat side. SOLUTION: An instrument body 4 of a master instrument 1 is attached to a sun visor 11 at an upper part of a windshield of a passenger's seat 12 side with an elastic setting tool 10 so as to direct the detecting direction of a detecting axis of a light receiving part 5a of a first infrared ray sensor exposed before. An instrument body 13 of a slave instrument 2 is attached to an fixed bracket 9 secured to a center pillar 11 of the passenger's seat 12 side so as to direct the detecting direction of a detecting axis of a light receiving part 14a of a second infrared sensor so that an upside of the rear seat 22, an upside of a floor 24, and right side door direction including a front side fall within the scope of the detection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle burglar alarm using an infrared sensor.

[0002]

2. Description of the Related Art Conventionally, there is a vehicular theft alarm which detects an intruder in a vehicle using an infrared sensor and issues an alarm to prevent theft in the vehicle.

[0003]

The above-mentioned on-board burglar alarm is very convenient in that it prevents on-board burglary during parking, but the conventional on-board burglar alarm uses an infrared sensor. The sensor was installed so that the detection axis was facing down near the center of the ceiling near the mounting position of the interior light.

Therefore, the distance from the ceiling surface on which the infrared sensor is mounted to the seat surface is short, and the detection range of the infrared sensor is narrow. For this reason, in a hatchback type vehicle, the detection range does not reach the hatchback door, and there is a problem that detection is not possible even if the vehicle enters through the hatchback door.

[0005] Further, if it is attempted to secure detection ranges on the driver and passenger seats and on the rear seat, the backrests of the driver and passenger seats become obstacles for infrared detection and are placed on the seats. There was a problem that blind spots occurred.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the invention of claim 1 is to cover not only a driver's seat and a passenger seat in a vehicle but also a rear seat side. Another object of the present invention is to provide an on-vehicle burglar alarm that does not cause blind spots in infrared detection.

Another object of the present invention is to provide an on-vehicle vehicle capable of reliably detecting the opening and closing of a hatchback door and detecting the opening and closing of one side door in the detecting direction of a slave unit in addition to the above objects. It is to provide a burglar alarm.

A third object of the present invention is to provide an on-vehicle burglar alarm in which a parent device can be easily attached to a sun visor in addition to the object of the second invention.

A fourth object of the present invention is to provide a vehicle burglar alarm which can easily set the direction of a detection axis of an infrared sensor of a slave unit in addition to the object of the second invention. Is to provide.

The object of the invention of claim 5 is, in addition to the object of the invention of claim 4, a vehicle theft in which the direction of the detection axis of the infrared sensor of the slave unit can be easily set according to the vehicle type. It is to provide an alarm.

[0011]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a master unit in which a light receiving portion of a first infrared sensor to be built is exposed to the outside, and a second infrared sensor to be built in. At least one slave unit for connecting a detection output of the second infrared sensor to a signal processing unit in the master unit while allowing a light receiving unit of the sensor to face the outside, and a detection axis of the first infrared sensor. Is arranged at the upper part of the vehicle inside the windshield so as to face the rear of the vehicle, and at one side of the middle part in the vehicle such that the detection axis of the second infrared sensor is directed at least diagonally downward in the width direction of the vehicle. The slave unit is arranged at a position higher than the height of the front seat, and an alarm is issued when the signal processing means determines that there is an intruder based on detection outputs of the first and second infrared sensors. .

According to a second aspect of the present invention, in the first aspect of the present invention, the parent device is attached to a sun visor corresponding to a passenger seat or a driver's seat, and a seat side center corresponding to the sun visor to which the parent device is attached. The child device is attached to the upper part of the pillar inside the vehicle.

According to a third aspect of the present invention, in the second aspect of the present invention, the sun visor is elastically sandwiched between the master and the upper surface of the base of the master, so that the base of the master is connected to the sun. It is characterized by having elastic attachment means attached to the visor.

According to a fourth aspect of the present invention, in the second aspect of the present invention, as the means for attaching to the center pillar of the slave, a fixture for pivotally supporting the body of the slave so as to be rotatable in the horizontal direction is provided. It is characterized by having.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the fixing bracket is provided with a display indicating the correspondence between the turning position of the slave unit and the vehicle type.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.

As shown in FIG. 2, the basic configuration of the on-vehicle burglar alarm of this embodiment comprises a master 1, a slave 2, and a remote control transmitter 3 for turning on / off the alert. . The parent device 1 incorporates a circuit shown in FIG. 4 in a flat rectangular parallelepiped body 4 and includes, at the center of the front surface of the body 4, a pyroelectric element to be built in and an amplifying unit for a detection signal of the pyroelectric element. First
The light receiving portion 5a of the infrared sensor 5 is facing. A light receiving section 6a of a remote control receiving circuit 6 (see FIG. 4) for receiving a remote control signal from a remote control transmitter 3 using infrared light as a signal medium is provided next to the light receiving section 6a. These light receiving sections 5a,
A plurality of light emitting diodes 8 are provided on the front surface of the body 4 below 6a.
.. (See FIG. 3) are arranged in a horizontal line. On the upper part of the body 4, a wire spring material is bent in a substantially U-shape, and both ends, that is, the rear end thereof, are fixed to the rear part of the body 4. A resilient fitting 10 is provided. The elastic attachment 10 is for attaching the body 4 of the parent device 1 to the sun visor 11 as shown in FIG.
The front edge of the sun visor 11 on the side is inserted between the elastic fitting 10 and the upper surface of the body 4 from the front end side of the elastic fitting 10, and the sun is inserted between the elastic fitting 10 and the upper surface of the body 4. The container 4 is attached to the sun visor 11 by elastically holding the visor 11. By this mounting, the detection axis direction of the light receiving portion 5a of the infrared sensor 5 provided on the front surface of the body 4 is directed rearward in the vehicle, and if the vehicle to be mounted is a hatchback vehicle, the hatchback door may also enter the detection range. I can do it. Of course, it may be attached to the sun visor on the driver's seat 23 side. .

On the other hand, a slave unit 2 includes a second infrared sensor 1 including a pyroelectric element and an amplifier for amplifying a detection signal in a body 13.
4 (see FIG. 4), and the light receiving section 1 of the infrared sensor 14
4a faces the downwardly inclined surface formed at the lower part of the front surface of the container 13. The detection signal line 1 of the infrared sensor 14
5 is a harness plug (not shown) provided at the end
Can be connected to a microcomputer (hereinafter referred to as a microcomputer) 17 (refer to FIG. 4) which constitutes a signal processing means in the parent device 1 by being detachably connected to a connector 16 (refer to FIG. 3) provided in the base unit 1. It has become.

The child unit 2 corresponds to the sun visor 11 to which the main unit 1 of the main unit 1 is attached.
In the case of the second side, as shown in FIG.
It is attached using.

As shown in FIG. 3 (b), the fixing member 19 is formed of a metal member having a U-shaped cross section, and the central piece 19a is attached to the back of the central piece 19a by a double-sided adhesive sheet (not shown). The center pillar 18 is fixed to a predetermined position.

The slave 2 is located between the upper and lower pieces 19b and 19c.
3a is sandwiched as shown in FIG.
A screw body 20a penetrated from the lower surface side into the center of 9c is screwed into the lower center of the body 13, and the body 13 is rotatably supported in a horizontal direction without tightening the screw 20a. I do. On the other hand, the upper piece 19b is provided with an arc-shaped hole 21 centered on a position corresponding to an axis passing through the screwing position of the screw body 20a, and the screw body 20b is placed on the upper surface of the body 13 through the hole 21. It is designed to be screwed.

Therefore, by rotating the body 13 in the horizontal direction about the screw body 20a with the screw bodies 20a and 20b loosened, the light receiving section 14 of the infrared sensor 14 of the slave 2 can be obtained.
The direction of the detection shaft a can be adjusted in the left-right direction as viewed from the center pillar 18, and after adjusting the direction of the detection shaft according to the vehicle to be mounted, the upper and lower screw bodies 20b and 20a are tightened. The second container 13 can be fixed to the center pillar 18 through the fixing bracket 19. Thereby, the detection range of the handset 2 by the infrared sensor 14 is set between the vicinity of the door on the front right side (the driver's seat 23), the seat of the rear seat 22 and the front seat (the passenger seat 12 and the driver's seat 23). It can be set to include on the floor 24. When the driver's seat 23 is on the left side, the center pillar on which the slave unit 2 is mounted changes from the left side to the right side. Of course driver's seat 23
The child device 2 may be attached to the side center pillar side.

A display 25 indicating the correspondence between the turning position of the child device 2 and the type of vehicle is provided at both ends and a center position of the arc-shaped hole 21, respectively.
, The vehicle type (for example, "light", "normal",
3 types of "large").

The on-vehicle burglar alarm of the present embodiment is the master 1
The system operates using a secondary battery 26 built in the microcomputer as a power source.
And a charging circuit 2 connected to a battery mounted on the vehicle by a cigar plug 27 as shown in FIG. 4 to power the battery and charge the secondary battery 26 under the control of the microcomputer 17.
A constant voltage circuit 29 for stabilizing the voltage of the secondary battery 26 to a power supply voltage required by the microcomputer 17;
An oscillation circuit 30 for giving a basic clock to the microcomputer, a reset circuit 31 for resetting the microcomputer 17 at an initial start or as necessary, an EEPROM 32 for storing programs and data, and a threat under the control of the microcomputer 17. A buzzer circuit 33 for issuing an alarm, an input circuit 34 for inputting the detection output of the infrared sensor 14 of the slave 2 to the microcomputer 17, and a rechargeable battery 26 under the control of the microcomputer 17
A light emitting diode 35 that indicates when the battery is running out of capacity or charging,
The light emitting diodes 8 of the light emitting section 9 whose lighting is controlled by the control of the microcomputer 17 are constituted.

Here, the microcomputer 17 monitors the voltage of the secondary battery 36 to detect the remaining capacity of the battery, turns on the light emitting diode 35 when the remaining capacity is low, and displays a function of indicating that the battery has run out. A charging control function for controlling whether the charging circuit 28 is connected to a battery or not, and controlling the charging current of the charging circuit 28 based on the voltage of the secondary battery 26 when the charging circuit 28 is connected to the battery; During the charging operation, at least a charging display function for controlling the emission color and lighting state of the light emitting diode 35 to indicate that charging is being performed, and a vehicle burglar alarm function to be described later are provided.

Next, the theft alarm function, which is a main function of the present invention, will be described with reference to the flowchart of FIG.

First, the burglar alarm function of the microcomputer 17 of the on-vehicle burglar alarm of the present embodiment is in a standby mode with the secondary battery 26 as a power supply at normal times.

When the vehicle is parked or stopped and the passenger leaves the vehicle, the remote control transmitter 3 is operated from outside the vehicle to transmit the remote control signal of the security set to the light receiving section 6a of the remote control receiving circuit 6 of the parent device 1 in the vehicle. Send to.

The microcomputer 1 receiving and inputting the transmitted remote control signal of the security set through the remote control receiving circuit 6
7 is activated and the system is turned on, and enters a warning mode operation in which an intruder is detected and determined based on the detection output of the infrared sensor 5 or the infrared sensor 14 of the slave 2, and at the same time, the light emitting diodes 8. The lighting is scanned to indicate that people outside the vehicle are on alert.

When the passenger returns to the vehicle and resets the alert mode, a remote control signal for alert reset is transmitted from the remote control transmitter 3 to the light receiving section 6a of the remote control receiving circuit 6 of the parent device 1 in the vehicle. The microcomputer 17 that has received and input the remote control signal of the alert reset via the remote control receiving circuit 6 returns the operation of the theft alarm function to the standby mode.

If the window glass of the door is broken during the above-mentioned alert mode and there is a human body in the vehicle or there is a large temperature change in the vehicle due to opening and closing of the door, the infrared sensor 5a
When the amount of infrared rays detected by the 14 pyroelectric elements changes and the detection output exceeds a predetermined value (alarm threshold) set in advance, the theft alarm function of the microcomputer 17 has an intruder,
That is, it is determined that a thief has entered, and the buzzer circuit 33 is driven,
An alarm operation is started in which a buzzer sound is emitted and the light emitting diodes 8 are blinking at the same time. Then, the intruder threatened by the buzzer sound or the blinking of the light emitting diodes 8 will escape, and as a result, theft of the articles placed in the vehicle can be prevented.

Then, the burglar alarm function of the microcomputer 7 continues the alarm operation for a predetermined time (for example, one minute), and then returns to the operation in the alert mode again.

Here, the detection range of the infrared sensor 5 of the base unit 2 can include the hatchback door of a hatchback car, so that intrusion from the hatchback door can be reliably detected. Since the detection range can include on the seat of the rear seat 22 and on the floor 24, blind spots on the seat of the rear seat 22 and on the floor 24 can be eliminated, and intrusion on the rear seat 22 side can be prevented.

In the present embodiment, the elastic attachment 10 made of a wire spring is used as means for attaching the body 4 of the parent device 1 to the sun visor 11, but the elastic attachment made of a leaf spring material as shown in FIG. It may be configured using the tool 10. Further, the number of slaves 2 may be plural.

[0035]

According to the first aspect of the present invention, the parent device in which the light receiving portion of the first infrared sensor to be built in faces the outside and the light receiving portion of the second infrared sensor to be built in face to the outside,
At least one slave unit for connecting a detection output of the second infrared sensor to signal processing means in the master unit,
The parent device is arranged in the upper part of the interior of the vehicle on the windshield side such that the detection axis of the first infrared sensor is directed toward the rear of the vehicle, and the detection axis of the second infrared sensor is directed at least obliquely downward in the width direction of the vehicle. When the child unit is arranged at a position higher than the height of the front seat on one side of the middle part of the vehicle, and the signal processing means determines that there is an intruder based on the detection outputs of the first and second infrared sensors. Since an alarm is issued, blind spots in the passenger seat and driver's seat can be eliminated by the detection range of the infrared picture sensor of the parent device, and a detection range can be set in the rear of the vehicle to eliminate blind spots in the rear of the vehicle. The intrusion detection by opening and closing the front side door opposite to the side where the slave unit is installed and the intrusion into the rear seat are reliably performed by the container, and as a result, the blind spot of infrared detection in the car is eliminated, and high reliability is obtained That There is a result.

According to a second aspect of the present invention, in the first aspect of the present invention, the parent device is attached to a sun visor corresponding to a passenger seat or a driver's seat, and a seat side center corresponding to the sun visor to which the parent device is attached. Since the above-mentioned child device is installed in the upper part of the car inside the pillar, the parent device can be installed at the proper inside position using the existing one in the vehicle, and the installation location of the child device is secured by using the existing one In particular, the detection range of the master unit can correspond to the hatchback of a hatchback car, intrusion detection from the hatchback is also possible, and intrusion by opening and closing the door on the detection direction side of the slave unit can be reliably detected. This has the effect.

According to a third aspect of the present invention, in the invention of the second aspect, the sun visor is elastically sandwiched between the master and the upper surface of the body of the master so that the body of the master is connected to the sun. Since the elastic attachment means for attaching to the visor is provided, anyone can easily attach the parent device to the sun visor. It is characterized by the following.

According to a fourth aspect of the present invention, in the second aspect of the present invention, as the means for attaching the child device to the center pillar, a fixture for pivotally supporting the body of the child device so as to be rotatable in a horizontal direction is provided. Therefore, it is possible to easily adjust and set the direction of the detection axis of the infrared sensor of the slave unit.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, the fixing bracket is provided with a display indicating the correspondence between the rotational position of the slave unit and the vehicle type. The direction of the detection axis can be easily set to an appropriate direction corresponding to the vehicle type.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an attached state according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a parent device and a child device of the above.

FIG. 3 (a) is a perspective view of the child device attached to a fixture. (B) is a perspective view of the fixing bracket same as the above.

FIG. 4 is a system configuration diagram of the above system.

FIG. 5 is a flowchart for explaining the above operation.

FIG. 6 is a perspective view of another example of the parent device of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Parent device 5a Light receiving part 2 Child unit 10 Elastic mounting tool 11 Sun visor 12 Passenger's seat 13 Body 14 Light receiving part 15 Detection signal line 18 Center pillar 19 Fixture 22 Rear seat 23 Driver's seat 24 Floor

Claims (5)

[Claims] 1. A main unit in which a light receiving portion of a first infrared sensor to be built in is exposed to the outside, and a light receiving portion of a second infrared sensor to be built in is exposed to the outside, and signal processing means in the master device. At least one slave unit connected to the detection output of the second infrared sensor, and a master unit is arranged at the upper part in the vehicle on the windshield side such that the detection axis of the first infrared sensor faces rearward of the vehicle. Positioning the slave unit at a position higher than the height of the front seat on one side of the middle part in the vehicle so that the detection axis of the second infrared sensor faces in the vehicle width direction and at least diagonally downward; Generates an alarm when it is determined that there is an intruder based on detection outputs of the first and second infrared sensors. 2. The base unit is mounted on a sun visor corresponding to a passenger seat or a driver's seat, and the slave unit is mounted on an upper portion in a vehicle of a center pillar on a seat side corresponding to the sun visor on which the base unit is mounted. The on-vehicle burglar alarm according to claim 1, wherein: 3. The apparatus according to claim 3, wherein said master unit is provided with elastic mounting means for elastically holding a sun visor between said master unit and an upper surface of said base unit to attach said base unit to said sun visor. The on-vehicle burglar alarm according to claim 2, characterized in that: 4. The fixing device according to claim 2, wherein the means for attaching the child device to the center pillar is constituted by a fixture for pivotally supporting the body of the child device so as to be rotatable in a horizontal direction. Car burglar alarm. 5. An on-vehicle burglar alarm according to claim 4, wherein the fixing bracket is provided with a display indicating the correspondence between the turning position of the slave unit and the vehicle type.