KR101679017B1

KR101679017B1 - Head-up display apparatus for vehicle and control method thereof

Info

Publication number: KR101679017B1
Application number: KR1020150046232A
Authority: KR
Inventors: 함성식
Original assignee: 주식회사 티노스
Priority date: 2015-04-01
Filing date: 2015-04-01
Publication date: 2016-11-23
Also published as: KR20160118014A

Abstract

The present invention relates to an apparatus and method for generating a virtual image in a HUD for informing a driver of a safety distance between vehicles when driving on the road. To this end, an apparatus for generating a virtual image in the HUD according to the present invention includes a control unit including an input unit for inputting a safety distance measurement magnification, an output unit, and a speed measurement unit for measuring a speed of the vehicle.

Description

[0001] The present invention relates to an apparatus and a method for generating a virtual image in a HUD,

The present invention relates to an apparatus and method for generating a virtual image in a HUD, and more particularly, to an apparatus and method for generating a virtual image in a HUD for informing a driver of a safe distance between vehicles when driving on the road.

Currently, high-end vehicles are equipped with a system that notifies the risk of collision to be alerted by an ultrasonic sensor mounted on the front and rear of the vehicle in order to avoid collision when driving or parking. However, since it can only detect short- And it can be used only when parking.

In addition, there are a lane departure warning system (LDWS) and a line maintenance system (LKS) as a safety navigation assistance system through video, but such a system recognizes a lane of a road, And is susceptible to changes in the external environment, there is a disadvantage that the stability is limited.

Accordingly, there is a need for a means for recognizing another traveling vehicle at a long distance and maintaining the safety distance to the user in order to perform safe driving.

SUMMARY OF THE INVENTION The present invention has been devised to solve the problems described above, and it is an object of the present invention to provide a front cognitive capability improving function for improving a driving control ability of a driver, And a head-up display unit (HUD) for informing the driver of the driver's safety driving operation and improving the driving convenience.

In order to achieve the above object, an apparatus for generating a virtual image in a HUD according to the present invention includes a control unit including an input unit for receiving a safety distance measurement magnification, an output unit, and a speed measurement unit for measuring a speed of the vehicle .

The control unit may further include a distance measuring unit for measuring a distance to the preceding vehicle and a distance calculating unit for calculating a safety distance required for safe operation using the safety distance measurement magnification and the speed of the vehicle .

The control unit may further include an alarm generating unit for generating an alarm when the distance from the preceding vehicle is within the calculated safe distance.

The alarm generating unit may generate a virtual image in the output unit.

The output unit outputs a virtual image, and the alarm generating unit generates an alarm using one or more methods of blinking the virtual image or changing a color of the virtual image.

A method for generating a virtual image in a HUD according to another aspect of the present invention includes the steps of receiving a safety distance measurement magnification, measuring a speed of the vehicle, measuring a distance between the vehicle and a safety distance measurement scale, And calculating a safety distance necessary for safe operation using the speed of the vehicle.

The method may further include generating an alarm when the distance to the preceding vehicle is within the safe distance.

Further, the alarm is characterized by outputting a virtual image.

The method may further include outputting a virtual image, wherein the alarm is one or more of a method of blinking the virtual image or a method of changing a color of the virtual image.

As described above, the apparatus and method for generating a virtual image in the HUD of the present invention can generate a virtual image at a position corresponding to the safe distance between the vehicles, thereby improving the driver's safe driving and improving the driving convenience.

1 is a block diagram of an apparatus for generating a virtual image in a head-up display according to the present invention.
2 is a block diagram of a control unit of the apparatus applied to Fig.
3 is an operational flowchart of an apparatus for generating a best image in a head-up display according to the present invention.

Hereinafter, an apparatus and method for generating a virtual image in the HUD according to the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of an apparatus for generating a virtual image in a head-up display (hereinafter referred to as 'HUD apparatus') according to an embodiment of the present invention.

Referring to FIG. 1, the HUD apparatus includes an input unit 110, an output unit 130, and a control unit 150.

Hereinafter, the above constituent elements will be described in detail.

The input unit 110 may receive a safety distance measurement magnification from a user. The safety distance is preferably basically set in proportion to the speed of the vehicle, and it is preferable that the safety distance is set differently depending on the reaction speed of the driver and the climatic conditions. That is, in the case of an elderly driver, since the reaction speed may be slow, it is desirable to set the safety distance longer. In addition, when the snow or rain falls and the road surface is wet, the safety distance should be set longer than when the road surface is not wet. It is therefore desirable to be able to set the safety distance measurement magnification to reflect situations that may affect the safety distance, such as the driver ' s condition or climatic conditions.

The safety distance measurement magnification can be entered numerically by the driver. Also, it may be set in consideration of the average reaction speed of the people of the age who received the input of the age of the driver (20s, 30s, 40s, 50s, etc.). In addition, it is also possible to input the climatic conditions (rain, snow, fog, etc.) and set the corresponding safety distance measurement magnification.

The output unit 130 may output a virtual image at a position corresponding to the safety distance calculated by the control unit 150. [ In addition, when the distance from the preceding vehicle is within the safe distance calculated by the controller 150, the virtual image may be output.

When the virtual image is outputted regardless of the distance from the preceding vehicle, the alarm can be provided to the driver by blinking the virtual image or changing the color of the virtual image if the virtual image comes close to the preceding vehicle within the safety distance.

Also, even when the vehicle approaches within a safe distance, an alarm may be provided to the driver only by outputting a virtual image, or a method of providing an alarm when the virtual image is output regardless of the distance from the vehicle.

FIG. 2 is a block diagram for explaining a control unit of the HUD apparatus of FIG. 1 in detail.

The control unit 150 includes a distance measuring unit 210, a speed measuring unit 230, a distance calculating unit 250, and an alarm generating unit 270.

The distance measuring unit 210 measures the distance to the preceding vehicle. The distance measuring method may include at least one of an infrared method, an ultrasonic method, and an image processing method.

The infrared method is a method of measuring the distance by measuring the amount of infrared rays, that is, the amount of reflected light, which is emitted by using an infrared LED having a wavelength of 900 nm or more and hit the object. Since the reflection amount is inversely proportional to the square of the distance, if the reflection amount is large, the distance is close, and conversely, if the reflection amount is small, it can be judged that the reflection amount is far away. Since the reflection amount affects the color of the object or the surface state of the object in addition to the distance, there is a disadvantage in that reflected light differs even if it is at the same distance according to the object to be measured. However, .

The ultrasonic method uses a sound wave of 20 kHz or more, which is outside the human audible frequency band of 20 Hz to 20 kHz, to measure the distance, and mainly uses a 40 kHz sound wave. The characteristics of the ultrasonic wave are the same as the sound of the sound wave, and when it hits an object proceeding at 340m per second, it is reflected in the reflection angle direction (incident angle = reflection angle) with respect to the incident angle. The higher the frequency, the higher the spatial resolution, the more precise the result, the transparent object which can not be measured by the infrared method can measure the distance and is not affected by the external lighting environment, but the short distance ), There is a disadvantage that there are many malfunctions.

The image processing method is a method of measuring the distance in the image through the image coming from the camera. To measure physical distances in an image, we first need to know the intrinsic parameters that determine the relationship between the camera's lens and the sensor, and the extrinsic parameters between the camera's coordinate system and our reference coordinate system. The process of grasping such parameters is called camera calibration, and it is common to carry out a process through a plurality of images using three-dimensional or two-dimensional objects. When the camera calibration is completed, it is possible to measure the distance from multiple images under the assumption that the camera knows the movement of the camera by using one camera, or to measure the distance through matching between images by receiving images from two or more cameras at the same time . The image processing method has a merit that the distance can be measured very densely over a wide area, but the system configuration is complicated and the manufacturing cost is increased. In recent years, however, since the CMOS camera has been introduced, the implementation of the camera can be implemented at a relatively low cost, and the interest is gradually increasing.

The other method is a triangulation method. In this method, the distance from the object is calculated by irradiating the infrared ray from the light emitting part, condensing the reflected infrared ray on the one-dimensional image sensor, and measuring the concentrated position of the reflected light. This method is relatively less affected by external light, and the distance measurement resolution is proportional to the number of pixels of the sensor. Therefore, it is advantageous to make an appropriate sensor according to the application, but it is disadvantageous in that it is expensive because of optical design.

That is, the distance measuring unit 210 measures the distance to the preceding vehicle by combining any of the above methods or the above methods.

The speed measuring unit 230 serves to measure the speed of the vehicle. The speed displayed on the vehicle's speedometer is measured in the following manner.

Speed = (outer diameter size of tire) X (number of revolutions per second of vehicle speed sensor) X 3600

In this case, since the outer diameter size of the tire is based on the outer diameter size of a genuine tire at the time of initial delivery of the vehicle, the speed may be incorrectly measured when the tire is replaced with a tire other than the prescribed tire series.

Therefore, in order to more accurately measure the speed, a method of obtaining speed by referring to absolute position data actually transmitted by the vehicle while communicating with a satellite by incorporating a GPS module or the like can be used.

The distance calculator 250 may calculate the safety distance based on the safety distance measurement magnification input through the input unit 110 and the speed of the vehicle measured by the speed measurement unit 230 using the following equation.

Safety distance (m) = vehicle speed (km / h) X Safety distance measurement magnification

The safety distance measurement magnification can be input from the user in consideration of the state (age, etc.) of the driver, the weather condition, and the like as described above. That is, for example, if the safety distance measurement magnification is set to 1 (good weather conditions), the safety distance can be maintained at 100 m for a vehicle of 100 km / h, and when the safety distance measurement magnification is set to 2 ) Can be set to double the safety distance.

The alarm generating unit 270 generates a warning signal to the driver through the virtual image output from the output unit 130 when the distance to the preceding vehicle measured by the distance measuring unit 230 is within the safety distance calculated by the distance calculating unit 250 An alarm can be generated. In the case of outputting a virtual image regardless of whether the vehicle is within the safety distance or not, it is possible to generate an alarm to the driver by blinking the virtual image or by changing the image color of the virtual image when the vehicle approaches the safety distance within the safety distance .

In addition, a virtual image may not be output while the distance from the preceding vehicle is maintained above the safety distance by the alarm generating method, and an alarm may be generated by outputting the virtual image when the vehicle distance is within the safety distance. In this case, you can also output a blinking virtual image, or output the color of the virtual image as a conspicuous color (eg red).

3 is a flowchart illustrating an operation of the HUD apparatus according to an embodiment of the present invention.

Referring to FIG. 3, in the HUD device according to the embodiment of the present invention, the safety distance measurement magnification is input in the input unit 110 (S310). The speed measuring unit 230 measures the speed of the vehicle and transmits it to the distance calculating unit 250 (S320). After the step S320, the distance calculation unit 250 calculates a safe distance for safe driving using the speed of the vehicle, the distance to the preceding vehicle, and the safety distance measurement magnification (S330). After the step S330, the distance measuring unit 210 measures the distance to the preceding vehicle and transmits the measurement result to the distance calculating unit 250 (S340). If the distance between the safety distance calculated in step S330 and the previous vehicle measured in step S340 is within the calculated safety distance measured in step S340, An alarm can be generated (S350). This alarm can be performed through the virtual image output from the output unit 130. [ The alarm through the virtual image can be performed through the virtual image output or the virtual image output type (flicker, color change, etc.) as described above. If the calculated safety distance is smaller than the measured distance from the preceding vehicle, the procedure may be repeated from step S320.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present invention. Although specific terms are employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims.

110: input unit 130: output unit
150: control unit 210: distance measuring unit
230: speed measuring unit 250: distance calculating unit
270:

Claims

An input unit for receiving a safety distance measurement magnification set by receiving a driver's age information and climatic condition information;
A safety distance measuring unit for measuring a speed of the vehicle and calculating a safety distance with respect to the preceding vehicle by referring to the safety distance measurement magnification input through the input unit and the speed of the vehicle, and generating an alarm when the distance to the preceding vehicle is within the safety distance A control unit; And
And an output unit for outputting an alarm generated by the control unit as a virtual image,
The control unit may include: a distance measuring unit that measures a distance to the preceding vehicle; And a distance calculation unit for calculating a safety distance necessary for safe driving by using the safety distance measurement magnification and the speed of the vehicle.

delete

The apparatus of claim 1,
An alarm generating unit for generating an alarm when the distance from the preceding vehicle is within the calculated safe distance;
Further comprising: means for generating a virtual image in the HUD.

4. The apparatus of claim 3,
And to generate a virtual image at the output.

The image processing apparatus according to claim 3,
The virtual image is displayed so as to be displayed on the front window of the vehicle,
Wherein the alarm generating unit comprises:
Wherein the alarm is generated using one or more of a method of blinking the virtual image, and a method of changing a color of the virtual image.

Receiving input of a driver's age information and climate condition information and a safety distance measurement magnification set by the input unit;
The control unit measuring the speed of the vehicle;
The control unit measuring the distance to the preceding vehicle; And
Calculating a safety distance necessary for safe operation with reference to the safe distance measurement magnification and the speed of the vehicle;
To create a virtual image in the HUD.

The method of claim 6,
And generating an alarm when the distance from the control unit to the preceding vehicle is within the safe distance.

The method of claim 7,
And the output is outputted so as to be displayed as a virtual image on the front window of the vehicle.

The method of claim 8,
Wherein the virtual image is flickered or changed in various colors and output.