KR100194440B1 - Control circuit in case of car crash - Google Patents

Abstract

The present invention relates to a control circuit during the fall of the car for minimizing human injury by deploying an airbag when detecting that the car falls in a high place such as a cliff, the front for detecting whether the front left and right wheels of the car is in contact with the ground The left and right wheel detection sensor, the rear left and right wheel detection sensor for detecting whether the rear left and right wheels of the car are in contact with the ground, and the front left and right wheel detection sensor and the rear left and right wheel detection sensor for detecting whether the car falls down A microcomputer, a timer connected to the microcomputer for counting for a predetermined time, a transistor driven by the output of the microcomputer, a relay connected to the transistor, a charge unit for bursting the powder when the relay is excited, Connected to the peony unit, the airbag deployed when the peony unit is driven The control circuit when a crash of the vehicle.

Description

Control circuit in case of car crash

1 is a circuit diagram showing an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: Front left and right wheel sensor 2: Rear left and right wheel sensor

3: micom 4: timer

5: relay 6: peony

7: Air bag 8: Control circuit drive switch in case of fall

The present invention relates to a control circuit when a vehicle falls, and to a circuit for minimizing human injury by deploying an airbag when detecting that the vehicle falls at a high place such as a cliff.

As the number of automobiles increases, the number of automobiles equipped with airbags is increasing in order to prevent injuries in a car accident. In addition, the airbag is also installed in order to protect the frontal collision and side collision, or in the case of a crash in a place such as a cliff, because the airbag is not driven in the situation that there are not much measures in case of a fall.

The present invention is to solve such a problem, it is an object of the present invention to provide a control circuit when the fall of the vehicle that can reduce the casualty by detecting the fall of the vehicle equipped with the air bag.

This object is achieved by attaching a sensor that detects whether the wheels of the vehicle are in contact with the ground so that the airbag can be deployed by judging the fall when the vehicle is away from the ground for a predetermined time.

Features of the present invention, the front left and right wheel detection sensor for detecting whether the front left and right wheels of the vehicle is in contact with the ground, the rear left and right wheel detection sensor for detecting whether the rear left and right wheels are in contact with the ground, and the front left and right wheels A microcomputer that determines whether the vehicle has fallen by receiving the detection signals of the sensor and the rear left and right wheel sensors, a timer connected to the microcomputer for counting for a predetermined time, a transistor driven by the output of the microcomputer, and the transistor; It is composed of a relay that is connected and excited, a charge unit for bursting the gunpowder when the relay is excited, and an airbag connected to the charge unit and deployed when driving the charge unit. Reference numeral 8 denotes a switch for determining whether to drive the control circuit in the fall.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram showing an embodiment of the present invention, the front left and right wheel detection sensor (1) for detecting whether the front left and right wheels of the vehicle is in contact with the ground, and the rear left and right wheels detecting the sensor is in contact with the ground Rear left and right wheel sensor 2 is used as a sensor of the same type is detected according to the weight of the wheel. The microcomputer 3 to which the outputs of the front left and right wheel detection sensors 1 and the rear left and right wheel detection sensors 2 are applied is connected to a timer 4 so that the output of the detection sensors 1 and 2 is applied. It detects whether it is applied for a certain time.

The transistor Q driven by the output of the microcomputer 3 is connected to the relay 5 so that the reference power B + is applied to the charge unit 6 through the relay switch of the relay when the transistor Q is driven. The airbag 7 is configured to be deployed by the charge unit 6.

In the present invention configured as described above, when the fall is connected to the control circuit drive switch 8 to detect whether the fall, the microcomputer 3 is the front left and right wheel sensor 1 and the rear left and right wheel sensor 2 Will detect the output of. At this time, since the front and rear wheels are connected to the ground while the vehicle is in normal driving or parking, the front left and right wheel sensors 1 and the rear left and right wheel sensors 2 also remain connected. In addition, when driving on a bumpy road, the front and rear wheel sensors 1 and the rear left and right wheel sensors 2 may be separated from the ground for a while by the front and rear wheel sensors 2, but this is also a normal state. Done. However, when the front and rear wheels are all in an abnormal state separated from the ground, the microcomputer 3 drives the timer 4 to detect whether the wheels are separated from the ground for a predetermined time. When the wheel is separated from the ground for a shorter time than the set time, that is, when driving a small step, it is also recognized as a normal driving state in the microcomputer 3.

However, when the wheel is separated from the ground for longer than a predetermined time, the microcomputer 3 detects the emergency state in which the car is falling and turns on the transistor Q. When the transistor Q is turned on, the relay 5 is turned on. Since the relay switch is connected by the operation of the reference power (B +) is applied to the charge unit 6 through the relay switch. The charge unit 6 opens the airbag 7 by exploding the gun powder when the reference power source B + is applied. When the car falls, the airbags on both the front and the left and right sides fall and the airbags of the left and right sides fall, so that the damage to human life can be somewhat reduced. Will be.

Here, the fall control circuit drive switch 8 is a switch configured to prevent a malfunction in the case of riding a lift when the vehicle is usually towed or repaired.

As described above, the present invention detects whether the front and rear wheels are in contact with the ground by the front left and right wheel detection sensors and the rear left and right wheel detection sensors, so that all the airbags installed in the vehicle in the crashed state of the car are separated from the ground for a predetermined time. This can be used to mitigate impact, which is useful for reducing human injury.

Claims (1)

Front left and right wheel detection sensor 1 for detecting whether the front left and right wheels of the car are in contact with the ground, Rear left and right wheel detection sensor 2 for detecting whether the rear left and right wheels are in contact with the ground, and the front left and right wheels A microcomputer 3 determining whether the vehicle has fallen by receiving the detection signals of the sensor 1 and the rear left and right wheel sensors 2, a timer 4 connected to the microcomputer 3 and counting for a predetermined time; A transistor (Q) driven by the output of the microcomputer (3), a relay (5) coupled to the transistor (Q), and a charge unit (6) for bursting the explosives when the relay (5) is excited And an airbag (7) connected to the peony unit (6) and deployed when the peony unit is driven.