KR101757694B1 - Device and method for lighting emergency lamp automatically based on camera units - Google Patents

Abstract

The present invention relates to an emergency warning light automatic lighting apparatus comprising a front camera for photographing a front screen of a vehicle, a calculation unit for calculating the number of white pixels of the image photographed by the front camera, and a calculator for calculating, And a control unit for activating the emergency warning lamp. The emergency warning light automatic lighting apparatus according to claim 1, further comprising a rear camera for photographing the rear of the vehicle when the vehicle deceleration rate is equal to or greater than a predetermined threshold value, And a control unit for activating an emergency warning light when a rear vehicle is detected in a rear vehicle zone indicating a possibility of a vehicle-to-vehicle accident, the system comprising: More than white pixel count is detected If the vehicle is detected in the rear zone of the vehicle rear camera has the effect of emergency warning lights are flashing automatically to prevent accidents.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a device and method for automatically turning on an emergency light based on a camera,

The present invention relates to an automatic emergency lighting device and method, and more particularly, to an apparatus and method for automatically recognizing a situation using a camera and automatically lighting an emergency warning lamp when the vehicle enters a fog area or a sudden braking situation of the vehicle .

Emergency warning light for vehicles is a device to prepare for safety accidents when an obstacle appears in front of the vehicle, an abnormality occurs in the vehicle, or a sudden dangerous situation occurs. 1 is a configuration diagram of a conventional emergency warning lamp for a vehicle.

In the case of a novice driver, even if an unexpected state occurs in the front, the emergency warning lamp can not be turned on promptly, so that there is a problem that a rear-end vehicle and a rear-end accident can occur, It may be difficult to turn on the emergency warning lamp in case of a sudden accident or an emergency. In order to solve such a problem, a technique has been developed in which the emergency warning lamp is automatically turned on at the time of sudden braking by detecting the brake operation. However, since the warning lamp is operated only on the basis of the brake condition, there are limitations in detection of various emergency situations. Often it can happen.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle control system and a control method thereof, in which the emergency warning lamp is lit by confirming whether or not a fog area is entered by using the number of white pixels photographed by a forward camera in a vehicle, And an emergency warning lamp for illuminating the emergency warning lamp so as to prevent a safety accident and a collision accident with the rear vehicle.

According to an aspect of the present invention, there is provided an emergency warning light automatic lighting apparatus including a front camera for photographing a front screen of a vehicle, a calculation unit for calculating the number of white pixels of the image captured by the front camera, The control unit activates the emergency warning lamp.

According to another aspect of the present invention, there is provided a method of automatically turning on an emergency warning light, comprising the steps of: photographing the rear of the vehicle when the vehicle deceleration rate is equal to or greater than a predetermined threshold; Processing the picked up image to detect a rear vehicle; And activating the emergency warning lamp when detecting a rear vehicle in a rear vehicle zone where a collision accident is likely to occur between adjacent vehicles using the photographed rearview image.

According to the present invention, when the vehicle enters the fog area or there is a rear vehicle, the emergency warning lamp is automatically turned on when the vehicle suddenly brakes, thereby assisting safe driving.

In addition, emergency warning lamps on the vehicle can be turned on to prevent accidents even in unexpected situations that the driver does not anticipate.

1 is a configuration diagram of a conventional emergency warning lamp for a vehicle.
2 is a configuration diagram of an emergency warning light automatic lighting device using a front camera according to an embodiment of the present invention.
3 is a configuration diagram of an emergency warning light automatic lighting device using a rear camera according to an embodiment of the present invention.
4 is a flowchart of a method of automatically turning on an emergency warning light using a front camera according to an embodiment of the present invention.
5 is a flowchart of a method of automatically turning on an emergency warning light using a rear camera according to an embodiment of the present invention.
6 is an explanatory diagram showing a new pixel position interpolated by the image processing apparatus when converting a low resolution image into a high resolution image in the calculation unit;
7 is a configuration diagram of a pendulum type acceleration sensor.
8 is a configuration diagram of the vibration type acceleration sensor.
9 is a configuration diagram of a vibration type gyro acceleration sensor.
10 is a configuration diagram showing the configuration of an FIR filter.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. To fully disclose the scope of the invention to a person skilled in the art, and the invention is defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms " comprises, " and / or "comprising" refer to the presence or absence of one or more other components, steps, operations, and / Or additions.

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

2 is a configuration diagram of an emergency warning light automatic lighting device using a front camera according to an embodiment of the present invention. 2, an emergency warning light automatic lighting apparatus 200 using a front camera according to an embodiment of the present invention includes a front camera 211, a calculation unit 220, a control unit 230, and an emergency warning light display unit 240 .

The front camera 211 photographs the front of the vehicle. When the vehicle enters the fog area, it is necessary to turn on the emergency warning light to prevent safety accidents and collision accidents with the rear vehicle. The criterion for determining whether the fog area is white is the number of white pixels. The calculation unit 220 calculates the number of white pixels of the image captured by the front camera 211. When the image quality of the image captured by the front camera 211 is low, it is difficult to calculate the number of white pixels. In this case, it is necessary to improve the image quality from a low resolution to a high resolution. The control unit 230 determines the number of white pixels of the image and outputs a signal for activating the emergency warning lamp when the number of white pixels of the image is equal to or larger than the threshold value. If the number of white pixels of the image is less than the threshold value And outputs a signal to disable the emergency warning lamp. The emergency warning light display unit 240 receives the output signal of the control unit 230 as an input, and lights the emergency warning lamp.

6 is an explanatory diagram showing a new pixel position interpolated by the image processing apparatus when the calculation unit 220 converts a low resolution image into a high resolution image.

In Fig. 6, reference numerals 201 to 209 are adjacent to each other in the horizontal direction or the vertical direction, and are pixel elements having a pixel interval of 1. Reference numeral 210 denotes a new pixel to be created by interpolating a low-resolution image, and a luminance value to be obtained is denoted by F. Reference numeral 205 denotes a pixel of interest located closest to the new pixel 210 and has a luminance value A. Reference numerals 202, 208, 204 and 206 denote upper, lower, left, and right pixels adjacent to the target pixel 205, respectively. The target pixels 205 are located above, below, left, Adjacent to the target pixel 205, and have luminance values B, C, D, and E, respectively. Reference numeral i denotes a horizontal distance from the pixel of interest 205 to the new pixel 210. Reference numeral j denotes a vertical distance from the pixel of interest 205 to the new pixel 210, Let the direction be positive. Here, the luminance value F of the new pixel 210 is calculated as F = A + (i / 2) (E-D) + (j / 2) (C-B).

3 is a configuration diagram of an emergency warning light automatic lighting device using a rear camera according to an embodiment of the present invention. 3, an emergency warning light automatic lighting apparatus 300 using a rear camera according to an embodiment of the present invention includes a rear camera 310, a vehicle deceleration sensing unit 320, a control unit 330, an emergency warning light display unit 340 ).

The rear camera 310 photographs the rear of the vehicle. The vehicle deceleration detecting unit 320 calculates a vehicle deceleration rate at which the driver suddenly decelerates when a sudden dangerous situation occurs, such as when an obstacle appears in front of the vehicle during driving, or when an abnormality occurs in the vehicle. The control unit 330 receives the vehicle deceleration rate from the vehicle deceleration sensing unit 320 and operates the rear camera 310 to photograph the rearward image when the vehicle deceleration rate is equal to or greater than the threshold value. The control unit 330 outputs a signal for turning on the emergency warning lamp when it detects the rear vehicle in the rear vehicle zone. The emergency warning lamp display unit 340 receives the output signal of the control unit 330 as an input and lights the emergency warning lamp. The rear vehicle zone is set in the image taken by the rear camera, and when the rear vehicle appears in the area, it means a high possibility of a collision accident at the time of sudden braking.

Meanwhile, the vehicle deceleration sensing unit 320 may include an acceleration sensor. The acceleration sensor senses dynamic forces such as acceleration, vibration, and shock, and uses inertial force, electric deformation, and gyro principle. When the vehicle deceleration detecting unit 320 uses the acceleration sensor, the vehicle deceleration rate can be determined more accurately within a short time. The acceleration sensor includes a pendulum type acceleration sensor, a vibration type acceleration sensor, and a vibration type gyro acceleration sensor.

7 is a configuration diagram of a pendulum type acceleration sensor.

The pendulum accelerometer supports the pendulum with a low friction pivot bearing. When the acceleration a is applied, the pendulum is displaced in the opposite direction, and the pendular acceleration sensor measures the displacement to obtain the acceleration.

8 is a configuration diagram of the vibration type acceleration sensor.

의 차이를 검출한다. 가속도 a가 한 방향으로 가해지면 현의 장력에 차이가 발생하고, 그 주파수 차이로 가속도를 구한다.The vibration type acceleration sensor supports the mass m from both sides in a string,

Is detected. When the acceleration a is applied in one direction, a difference occurs in the string tension, and the acceleration is obtained by the frequency difference.

9 is a configuration diagram of a vibration type gyro acceleration sensor.

The vibrating gyro acceleration sensor includes a gyro. A gyro is a device that detects the angular velocity acting on the inertial system. The key element of the gyro is the power of Coriolis.

The Coriolis force relation is as follows.

이고, 평판을 기준으로 한 m의 회전속도이다. 식의 제 1항은 평판을 기존으로 한 좌표에서 측정한 경우의 원심력이고, 제 2항은 m의 회전 w와 평판의 회전

의 벡터곱의 힘이며, 그것은 v와

에 직각 방향의 힘이고 이것이 코리올리의 힘이다. 즉 평판이 정지하고 있는 것을 기준으로 측정하면, m에는 원심력

과 코리올리의 힘

및 제 3항의

이 작용하게 된다. 이 코리올리의 힘은

인 경우 0이 되고,

의 측정은 제 3항을 검출하는 것이 된다. 보통

는 작으므로 그 힘도 작다. 그러나

인 경우

인 각속도로 회전시켜 두면

라는 비교적 큰 힘을 검출하여

를 측정할 수 있다. 위와 같이 코리올리의 힘을 이용함으로써

를 검출할 수 있다. here

And is the rotation speed of m with respect to the flat plate. The first term in the equation is the centrifugal force when the plate is measured at a conventional coordinate, the second is the rotation w of m and the rotation of the plate

Is the force of the vector product of v,

This is the force of Coriolis. That is, when it is measured based on that the plate is stopped, m is the centrifugal force

And the power of Coriolis

And (3)

. The strength of this Coriolis

0, < / RTI >

The detection of the third term is performed. usually

Is small, so the force is small. But

If

If you rotate the

A relatively large force is detected

Can be measured. By using the Coriolis force as above

Can be detected.

4 is a flow chart of a method of automatically turning on an emergency warning light using a front camera according to an embodiment of the present invention (S400).

As shown,

The front camera 211 photographs the front screen of the vehicle (S410).

When the vehicle enters the fog area, the emergency warning light should be turned on, and the criterion for entering the fog area is the white pixel of the front screen image.

The front screen image is filtered using the FIR filter (S420). The image quality of the image is improved and the calculation unit 220 can easily find the number of white pixels. (To be described later with reference to Fig. 10).

If the number of white pixels is equal to or greater than the threshold value (S430), it is determined that the vehicle enters the fog area (S430).

The emergency warning lamp is activated (S440).

10 is a configuration diagram showing the configuration of an FIR filter.

A finite impulse response (FIR) filter is a type of digital filter that performs filtering with only certain values of the input signal. Therefore, when the impulse response, which is a characteristic function of the filter, is obtained, it has a finite length. The FIR filter has a higher order than the IIR filter, is more easily phase shifted, has a simpler structure than the IIR filter, and ensures the stability of the output signal. Therefore, when the forward image is filtered using the FIR filter, a more stable and high-resolution image can be obtained.

5 is a flowchart of a method of automatically turning on an emergency warning light using a rear camera according to an embodiment of the present invention (S500).

It is determined whether the vehicle deceleration rate is equal to or greater than a threshold value (S510).

The rear of the vehicle is photographed using the rear camera 310 (S520).

The rear vehicle is detected based on the photographed image (S530).

It is determined whether the rear vehicle enters the rear vehicle zone (S540).

When the rear vehicle is identified in the rear vehicle zone, the emergency warning lamp is activated (S550).

If the rear vehicle is not detected in the rear vehicle zone, the rear of the vehicle is photographed again (S520).

The rear camera 310 may be constituted by a CCD image sensor. The CCD image sensor is an image sensor using a CCD. CCD is an abbreviation of charge coupled device and is called a charge coupled device. A CCD is a semiconductor device capable of transferring a signal of a minority carrier injected into a semiconductor in a direction parallel to the crystal surface by an external voltage with a single mass of charge. The use of a CCD image sensor is advantageous in that a high-quality image can be obtained.

As described above, the emergency warning light automatic lighting method according to the present invention can prevent safety accidents and collision accidents by automatically blinking the emergency warning lamp when the vehicle is traveling in a fog area or when a rear vehicle is detected when the vehicle is suddenly stopped.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made without departing from the essential characteristics of the present invention. For example, the vehicle deceleration sensing unit 320 may determine whether the vehicle deceleration rate is greater than or equal to a threshold value (S510). Alternatively, the vehicle deceleration sensing unit 320 may determine whether the vehicle deceleration rate To the control unit 330, and the control unit can make a determination based on this. Also, the vehicle deceleration detecting unit 320 may be driven by the rear camera 310, or the control unit 330 may be driven. Alternatively, the controller 330 may sense the speed from the speed meter without driving the vehicle deceleration detecting unit 320 to drive the rear camera 310.

Therefore, the embodiments described in the present invention are not intended to limit the scope of the present invention, but are intended to be illustrative, and the scope of the present invention is not limited by these embodiments. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents, which fall within the scope of the present invention as claimed.

Claims (6)

A front camera for photographing a front screen of the vehicle;
A calculation unit for calculating the number of white pixels of the image taken by the front camera; And
Activating an emergency warning lamp when the number of white pixels of the image is equal to or greater than a predefined threshold,
And a control unit for deactivating the emergency warning lamp when the number of white pixels of the image is less than a predefined threshold value,
The calculation unit converts the low-resolution image into a high-resolution image. The calculation unit converts the low-resolution image into the high-resolution image, which is the low-resolution image located nearest to the interpolation pixel position to be newly generated, between the pixels of the low- A, the upper pixel data B of the lower-resolution image adjacent to the uppermost pixel in the target pixel, the lower pixel data C of the lower-resolution image adjacent to the target pixel, the left pixel data D of the lower- The right pixel data E of the low-resolution image adjacent to the right of the target pixel is selected,
(I, j) indicated by the horizontal distance i and the vertical distance j from the target pixel to the new pixel, the new pixel data F constituting the high resolution image is represented by
F = A + (i / 2) (ED) + (j / 2) (CB)
Of the emergency warning light. delete delete delete delete delete

Images