JPH07311277A - Prevention device for accident by catching walker under wheel of car - Google Patents

Abstract

PURPOSE:To obtain a prevention device for accident by catching a walker under a wheel of car by providing a focus lens selectively transmitting only infrared radiated from a human body. CONSTITUTION:A condenser lens 1 selectively transmits and condenses infrared of wave length of 6 to 10mum generated by a human body by limitedly in one direction. A pyroelectric sensor 2 converts the change of infrared condensed by a condenser lens 1 to the change of surface charge. A detection circuit 3 detects the change of surface charge of the pyroelectric sensor 2, amplifies and judges the existence of human body. The detection signal of the detection circuit 3 is sent to a control circuit 4. The control circuit 4, receiving the detection signal, indicates danger signal on a display-operation part 5 and rings a buzzer 6 to warn and call attention of the driver. In a motion detection circuit 7, the operation of an winker operation detection circuit 8, brake operation detection circuit 9, a steering operation detection circuit 10 is detected and sent to the control circuit 4. The control circuit 4 goes in danger signal generation preparation when at least one of each operation of a car is taken.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects the presence or absence of a human body in a bending direction when making a right or left turn in running an automobile,
The present invention relates to a car accident prevention device that prevents a car accident by generating a danger signal.

[0002]

2. Description of the Related Art As a conventional example, an accident involving a car accident is often caused by a driver's carelessness, and when an accident occurs, it is very likely to develop into a human accident such as an injury. A method for detecting the presence or absence of a human body or the like in the bending direction is being studied, and a detection device using a reflective infrared sensor has been proposed.

[0003]

However, in the case of the detection device using the infrared sensor of the above-mentioned conventional example, since it also operates due to obstacles such as electric poles, many malfunctions occur, and in a narrow road where an automobile finally passes by one. Since it always operates, there is a possibility that it may get used to the danger instruction and the sensation may become paralyzed. In addition, there is a problem that when the vehicle is driven straight on a wide road by always operating, it is activated by the approach of another vehicle.

Therefore, in order to solve the above problems, the present invention uses a pyroelectric sensor for detecting infrared rays emitted by a human body or the like as a detection element, and works in conjunction with a blinker (blinking device) of an automobile. An object of the present invention is to provide an optimum car accident prevention device that does not malfunction by operating only when necessary.

[0005]

In order to achieve this object, the present invention provides a condensing lens that selectively passes only infrared rays radiated by a human body, a pyroelectric sensor responsive to infrared rays, and the above-mentioned pyroelectric sensor. An accident prevention device having a detection circuit for detecting a change in an electric sensor, a determination circuit for determining a detection result, and an external interface for connecting to the outside, and an operation detection means represented by a winker of an automobile. A car accident prevention device for an automobile, which operates the accident prevention means only when necessary by interlocking with each other, and further starts the operation of the accident prevention means by rotating a steering wheel at a preset value or more. The accident prevention device for a vehicle according to the preceding paragraph, wherein the accident prevention device is operated when the brake is actuated. That.

[0006]

According to the present invention having the above-mentioned structure, it is possible to detect the presence or absence of a human body in the direction in which the vehicle bends when turning right or left in traveling of an automobile or the like, and generate a danger signal to prevent an accident. be able to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the circuit configuration of an automobile accident prevention device according to an embodiment of the present invention.

As shown in FIG. 1, this car accident prevention device is constructed as follows. A condenser lens 1 selectively condenses infrared rays having a wavelength of 6 to 10 μm generated by an external human body from a certain direction.
It is usually made of silicon or the like to have a filter effect. Reference numeral 2 denotes a pyroelectric sensor, which converts a change in infrared rays collected by the condenser lens 1 into a change in surface charge. Normally, a two-element or four-element type is used for noise compensation. Three
Is a detection circuit, which is composed of an amplifier and a converter, detects a change in the surface charge of the pyroelectric sensor 2, amplifies it, and determines the presence or absence of a human body. Reference numeral 4 denotes a control circuit, which is composed of a microcomputer or the like and controls ON / OFF of each unit. A display / operation unit 5 changes the combined operation of the sensors according to the driver's request and displays the status. The display is LC
D (liquid crystal display device) or the like is used, and the operation unit is composed of button switches or the like. 6 is a buzzer to alert the driver with a sound when a human body is detected. A motion detection circuit 7 detects each part of the vehicle and sends a motion detection signal to the control circuit. A turn signal operation detection circuit 8 detects the operation of the turn signal lever when turning right or left. A brake operation detection circuit 9 generates a level signal corresponding to the depression of the foot brake. Reference numeral 10 denotes a steering wheel operation detection circuit that generates a level signal according to the rotation angle of the steering wheel.

FIG. 2 is a detection range of an automobile entanglement accident prevention device according to an embodiment of the present invention and an installation drawing of the device. FIG. 2A is an explanatory diagram of a human body detection range in a state in which the automobile entanglement accident prevention device of one embodiment of the present invention is attached to the automobile.
Set to. FIG. 2B is a front view of the door mirror according to the embodiment of the present invention viewed from the door mirror side.
FIG. 2C is a plan cross-sectional view of the door mirror in one embodiment of the present invention seen from above, and FIGS. 2B and 2C show mounting states of the pyroelectric sensor of the present invention. In FIG. 2B, the protective film 13 provided at one corner of the door mirror 11
Protects the condenser lens 1 and also serves as the interior of the exterior, and is made of a silicon-based resin for transmitting infrared rays. Further, the size is made to have a diameter of 2 cm or less so as not to disturb the viewing of the door mirror 11.
In FIG. 2C, 14 is a mounting board for mounting the pyroelectric sensor 2 and the detection circuit 3, which is made of paper phenol. Reference numeral 15 is a connector through which a detection signal is sent from the detection circuit 3 to a control circuit inside the vehicle.

Next, the operation of this device will be described. Figure 2
Infrared rays emitted from the human body entering the detection range 12 of (a) pass through the protective film 13. Protective film 1
Reference numeral 3 serves as a filter so that only infrared rays pass through in order to separate from natural light such as the sun. The infrared rays that have passed through the protective film 13 are focused on the pyroelectric sensor 2 through the condenser lens 1. The detection range 12 can be changed by changing the shape of the condenser lens 1. The infrared light focused on the pyroelectric sensor 2 is detected by the detection circuit 3 as a change in charge, and the detection signal is sent to the control circuit 4 inside the vehicle through the connector 15. Upon receipt of the detection signal, the control circuit 4 displays a danger signal on the display / operation unit 5 and sounds the buzzer 6 to warn the driver to warn him.

[0012] Normally, when this device is operated by a bicycle, a motorcycle or the like that slips beside an automobile at the time of driving straight ahead or stopping at the time of traffic jam, it becomes accustomed to the danger signal and may be ignored at a really dangerous time. is there. For this reason, in the vehicle accident prevention device according to the embodiment of the present invention, the operation is linked to the behavior change of the vehicle so that the operation is performed only when it is really dangerous.

That is, a car accident occurs when the vehicle turns right or left. Behaviors of the vehicle at this time include direction indication by a blinker, braking and rotation of a steering wheel. Therefore, when these three types of behaviors are detected (logical sum operation) and the detection signal from the detection circuit 3 is ANDed (logical product operation) by the control circuit 4, the operation is performed only when it is really dangerous.

Since the winker operation detecting circuit 8 normally moves the lever mechanically, a microswitch or the like is used to detect the winker operation, and the operation detecting circuit 7 determines the contact / non-contact state of the contact.

For detecting the brake operation, a micro switch is attached to the brake operation detection circuit 9 so that the contact is turned on when the brake operation detection circuit 9 is depressed.
The operation detection circuit 7 detects ON-OFF of the micro switch.

The rotation operation of the handle is detected by a potentiometer attached to the rotary shaft of the handle operation detection circuit 10, which converts the rotation angle of the handle operation detection circuit 10 into a resistance value and sends it to the operation detection circuit 7.

The operation detection circuit 7 includes a winker operation detection circuit 8, a brake operation detection circuit 9, and a steering wheel operation detection circuit 1.
Each operation of 0 is detected and sent to the control circuit 4.

In the control circuit 4, when one of the behaviors of the automobile is performed, preparation for generating a danger signal is started, and when a detection signal is received from the detection circuit 3 within 5 seconds after the start of the behavior, a danger signal is output. Occur. Further, it is possible to switch on / off of the ON / OFF state of the automobile accident prevention device according to the embodiment of the present invention and whether or not to interlock with the behavior of each automobile by the display / operation unit 5. In this embodiment, the vehicle is housed in the door mirror from the viewpoint of the design of the vehicle, but it is of course possible to obtain the same performance by attaching a dedicated portion to the vehicle.

[0019]

As is apparent from the above description, according to the present invention, when a vehicle turns right or left while traveling,
It is possible to detect the presence / absence of a human body in the bending direction and generate a danger signal, and it is possible to prevent the accident from occurring.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of a car accident prevention device according to an embodiment of the present invention.

FIG. 2 (a) is an explanatory view of a human body detection range in a state in which the automobile accident prevention device of one embodiment of the present invention is attached to the automobile. Front view (c) A plan sectional view of a door mirror in one embodiment of the present invention as seen from above

[Explanation of symbols]

 1 Condensing Lens 2 Pyroelectric Sensor 3 Detection Circuit 4 Control Circuit 5 Display / Operation Unit 6 Buzzer 7 Motion Detection Circuit 8 Winker Motion Detection Circuit 9 Brake Motion Detection Circuit 10 Handle Motion Detection Circuit 11 Door Mirror 12 Detection Range 13 Protective Film 14 Installation Board 15 connector

Claims (3)

[Claims] 1. A condenser lens for selectively passing only infrared rays emitted by a human body, and a pyroelectric sensor responsive to infrared rays,
An accident prevention device having a detection circuit for detecting a change in the pyroelectric sensor, a determination circuit for determining a detection result, and an external interface for connecting to the outside, and detecting an operation represented by a winker of an automobile. A car accident prevention device, characterized in that the accident prevention device is operated only when necessary by interlocking with the device. 2. The car accident prevention device according to claim 1, wherein the operation of the accident prevention means is started by rotating a steering wheel at a predetermined value or more. 3. The vehicle accident prevention device according to claim 1, wherein the accident prevention means is operated when the brake is actuated.