KR101291301B1 - Vehicle speed measurement system using image and radar - Google Patents

Abstract

PURPOSE: A vehicle speed measuring system using images and radar is provided to obtain accurate speed information by removing speed errors due to the scattering, the reflection, and the distortion of a radar wave. CONSTITUTION: Radar (300) emits a radiation wave to a road and receives a reflected wave reflected from a vehicle driving on a road. A camera unit (200) obtains images by photographing the vehicle sensed by the radar. An image radar speed processing unit (100) measures the speed of all vehicles driving on a sensing region while measuring the speed using number plate recognition by photographing the images through the camera unit at the same time. The image radar speed processing unit determines a speeding vehicle by calculating an average speed of the measured two speeds. A control center server (400) obtains the images, the average speed, a date, weather, and time data transmitted from the image radar speed processing unit and expresses the same on a predetermined region. [Reference numerals] (100) Image radar speed processing unit; (200) Camera unit; (300) Radar; (400) Control center server

Description

Vehicle speed measurement system using image and radar

The present invention relates to a vehicle speed measuring system using an image and a radar, and more particularly, to measure the speed of all vehicles traveling in a detection zone by emitting a radar, and simultaneously photographing images through a camera unit to obtain a license plate. After the speed is measured using recognition, two measured average speeds are calculated to determine whether the vehicle is an overspeed vehicle, and images and radars that provide accurate speed information by removing speed errors due to scattering, reflection, and distortion of radar radio waves. It relates to a vehicle speed measurement system using.

As traffic accidents caused by speeding can develop into life-threatening accidents that can cause fatal damage to drivers, various studies on speed detection devices using advanced equipment such as radar equipment to prevent speeding of vehicles or to detect speeding vehicles are being conducted. In addition, such a speed detection device is installed throughout the road due to the advantage that can detect the speeding vehicle unattended, the use field is expanding.

Currently, a method of measuring information and speed of a vehicle in a domestic ITS system includes a method of embedding a LOOP detector on a road, using a laser sensor, and acquiring information only through an image through a camera.

However, LOOP detector has the disadvantage that the road must be destroyed in the process of embedding on the road, and it can be a factor that hinders the flow of the vehicle in the process of construction.

In addition, it is difficult to obtain proper data on a vehicle changing lanes.

Laser detectors also suffered from the effects of weather and climate (snow, rain, fog, dust, etc.) and had a narrow detection width.

In addition, the image detector also has a disadvantage that is affected by the weather and climate much, especially the detection rate is greatly reduced at night.

On the other hand, radar detectors are relatively less affected by weather and climate than other detectors, and are non-contact, so there is no road destruction.

In addition, since the detection is extensive, it is also possible to detect a vehicle changing lanes, which is a disadvantage of the LOOP or laser detector.

The information output from the radar detector is the speed, distance, and angle of the vehicle. Through this, the exact position and information of the vehicle can be extracted.

However, since the radar also uses radio waves, incorrect data may be introduced due to scattering, reflection, or distortion of radio waves, thereby causing frequent problems.

Therefore, there is a need for a technique for providing accurate vehicle information without errors in radar detection for speeding vehicles.

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Therefore, the present invention has been proposed in view of the problems of the prior art as described above, and an object of the present invention is to measure the speed of all vehicles traveling in a detection zone by emitting radar, and at the same time, to capture an image through a camera unit. After measuring the speed through the license plate recognition, and calculating the two average speeds to determine whether the vehicle is an overspeed vehicle, it provides accurate speed information by eliminating speed errors caused by scattering, reflection and distortion of radar waves. have.

Another object of the present invention is to transmit the speed according to the video analysis to the control center server if the speed detected by the radar and the speed according to the video analysis does not match the error does not exist within the error range.

Another object of the present invention is to count the number of errors processed by the error processing unit to correct the radar detection distance when the predetermined reference value is exceeded to minimize the error.

Still another object of the present invention is to output the screen by changing the normal color and the error color so that the administrator can check when the detection result is normal and abnormal.

Still another object of the present invention is to allow the installer to easily check the detection area by using the laser pointer and lens when setting the detection area of the initial radar.

In order to achieve the object of the present invention,

Vehicle speed measurement system using the image and the radar according to an embodiment of the present invention,

A radar (300) for emitting radiation on the road and receiving reflected waves reflected from a vehicle traveling on the road;

A camera unit 200 for capturing a vehicle detected by the radar to obtain an image;

A radar speed extracting unit 105 for extracting velocity information from distance information from the radar by obtaining emission point information of the emission wave and reception time point of the reflected wave from the radar, and extracting the velocity information from the distance information;

An image processor 110 for recognizing a license plate from the acquired image and determining a number and a location of the license plate;

An image speed extraction unit 115 for extracting a vehicle speed based on the determined position and number of the license plate and pixel number data of an image photographed at a predetermined time interval;

Both speed determining unit 120 for determining whether the speed is matched by obtaining the speed information extracted by the radar speed extractor and the image speed extractor, and whether the speed information by the radar is included in the error range within the error range; ,

An average speed calculator 125 for calculating an average speed when the speed information determined by the double speed judging unit coincides or is within an error range;

Timer unit 130 for counting the date and time,

An information DB 135 for storing the obtained image, vehicle number, average speed, date, and time data;

Image radar speed processing means (100) comprising an information transmitting unit (140) for transmitting information stored in the information DB to a control center server in real time;

A data acquisition unit 410 for acquiring an image, an average speed, a date, and time data sent from the image radar speed processing means;

And a control center server 400 including a data display unit 420 for expressing a vehicle number, average speed, date and time data on a predetermined region on the vehicle image screen. Will be solved.

Vehicle speed measurement system using the image and the radar according to the present invention having the above configuration and action,

The radar is emitted to measure the speeds of all vehicles driving in the detection zone.At the same time, images are taken through the camera to measure the speed through license plate recognition. By determining the recognition, the speed error due to scattering, reflection, and distortion of the radar propagation is removed to provide accurate speed information, thereby minimizing the error of the radar detection.

In addition, if the speed detected by the radar does not match the speed according to the video analysis and does not exist within the error range, it is treated as an error to send the speed according to the video analysis to the control center server, thereby eliminating the speed error. To provide.

In addition, when the number of errors processed by the error processing unit is counted to correct the radar detection distance when the predetermined reference value is exceeded, the error is minimized.

In addition, by outputting the normal color and the error color to the screen so that the administrator can check whether the detection result is normal or abnormal, the speed detection accuracy of the current radar can be easily confirmed by the administrator. .

In addition, by setting the detection area of the initial radar, the laser pointer and the lens allow the installer to easily check the detection area, so that the radar area can be more accurately identified and the wrong data can be prevented from being output from the radar. do.

1 is an overall configuration diagram of a vehicle speed measurement system using an image and a radar according to an embodiment of the present invention.
2 is a block diagram of the image radar speed processing means of the vehicle speed measurement system using the image and the radar according to an embodiment of the present invention.
3 is a block diagram of the control center server of the vehicle speed measurement system using the image and the radar according to an embodiment of the present invention.
4 is an exemplary diagram showing a vehicle number and a speed of a vehicle speed measuring system using an image and a radar according to an embodiment of the present invention on a screen.
5 is an exemplary view illustrating an example of checking a detection area of a vehicle speed measuring system using an image and a radar using a laser according to an embodiment of the present invention.

Vehicle speed measurement system using an image and radar according to an embodiment of the present invention for achieving the above object,

A radar (300) for emitting radiation on the road and receiving reflected waves reflected from a vehicle traveling on the road;

A camera unit 200 for capturing a vehicle detected by the radar to obtain an image;

A radar speed extracting unit 105 for extracting velocity information from distance information from the radar by obtaining emission point information of the emission wave and reception time point of the reflected wave from the radar, and extracting the velocity information from the distance information;

An image processor 110 for recognizing a license plate from the acquired image and determining a number and a location of the license plate;

An image speed extraction unit 115 for extracting a vehicle speed based on the determined position and number of the license plate and pixel number data of an image photographed at a predetermined time interval;

Both speed determining unit 120 for determining whether the speed is matched by obtaining the speed information extracted by the radar speed extractor and the image speed extractor, and whether the speed information by the radar is included in the error range within the error range; ,

An average speed calculator 125 for calculating an average speed when the speed information determined by the double speed judging unit coincides or is within an error range;

Timer unit 130 for counting the date and time,

An information DB 135 for storing the obtained image, vehicle number, average speed, date, and time data;

Image radar speed processing means (100) comprising an information transmitting unit (140) for transmitting information stored in the information DB to a control center server in real time;

A data acquisition unit 410 for acquiring an image, an average speed, a date, and time data sent from the image radar speed processing means;

And a control center server 400 including a data display unit 420 for displaying the vehicle number, average speed, date, and time data in a predetermined region on the vehicle image screen.

At this time, the image radar speed processing means 100,

An error processing unit 145 for processing as an error when the speed information determined by the double speed determination unit does not match and does not exist within an error range,

The image processing apparatus may further include an image speed transmitting unit 150 which extracts the speed information extracted by the image speed extracting unit and transmits the extracted speed information to the information DB when the error processing unit processes the error.

At this time, the image radar speed processing means 100,

An error processing unit 145 for processing as an error when the speed information determined by the double speed determination unit does not match and does not exist within an error range,

An image speed sending unit 150 for extracting velocity information extracted by the image speed extracting unit and transmitting the extracted speed information to the information DB when the error processing unit processes the error;

And a radar detection distance correcting unit 155 for correcting the radar detection distance when counting the number of errors processed by the error processing unit exceeds a predetermined reference value.

At this time, the control center server 400,

A normal speed color display unit 430 for displaying the normal speed in a specific color when the speed information determined by the double speed judging unit matches or is present within an error range,

The speed information determined by the double speed determination unit does not match, and if it does not exist within the error range is characterized in that it further comprises an error speed color display unit 440 for displaying the error speed in a specific color.

At this time, the detection area of the radar 300,

A laser pointer (not shown) for emitting a laser beam to check;

And a lens (not shown) coupled to the laser pointer to adjust the angle of the laser beam.

Hereinafter, an embodiment of the vehicle speed measuring system using the image and the radar according to the present invention will be described in detail.

1 is an overall configuration diagram of a vehicle speed measurement system using an image and a radar according to an embodiment of the present invention.

A radar (300) for emitting radiation on the road and receiving reflected waves reflected from a vehicle traveling on the road;

A camera unit 200 for capturing a vehicle detected by the radar to obtain an image;

The radar is emitted to measure the speeds of all vehicles driving in the detection zone.At the same time, images are taken through the camera unit to measure the speed using license plate recognition, and then the two average speeds are calculated to calculate the speed. Image radar speed processing means (100) for determining whether the vehicle is a vehicle;

And a control center server 400 for acquiring an image, an average speed, a date, and time data sent from the image radar speed processing means and displaying the data in a predetermined area.

In detail, a radar and a camera unit are installed on an upper portion of a gantry vertically installed within a sensing range in which a speed limit is set, photographing a predetermined point in the sensing section to obtain image information of the vehicle, and generating a radar emission signal into the sensing section. It is possible to extract the speed, distance, angle, etc. of the vehicle by receiving the reflected signal emitted and emitted to the road and the vehicle.

2 is a block diagram of the image radar speed processing means of the vehicle speed measurement system using the image and the radar according to an embodiment of the present invention.

The image radar speed processing means of the present invention displays the speed, distance and angle data of the vehicle detected from the radar as shown in FIG.

However, since the vehicle may not exist at the location due to the error of the radar, the speed information according to the image processing is simultaneously acquired.

That is, to remove the radar error using the image.

If you use the radar as above, it is strong in the weather and it is difficult to avoid the place where the detector is located because it detects a large area. However, the radar also uses radio waves, so the scattering, reflection and distortion of the radio waves are used. Because wrong data can be obtained by the present invention, it can be improved by image detection, thereby providing an advantage of greatly reducing errors.

Image radar speed processing means 100 to provide the above advantages,

A radar speed extracting unit 105 for extracting velocity information from distance information from the radar by obtaining emission point information of the emission wave and reception time point of the reflected wave from the radar, and extracting the velocity information from the distance information;

An image processor 110 for recognizing a license plate from the acquired image and determining a number and a location of the license plate;

An image speed extraction unit 115 for extracting a vehicle speed based on the determined position and number of the license plate and pixel number data of an image photographed at a predetermined time interval;

Both speed determining unit 120 for determining whether the speed is matched by obtaining the speed information extracted by the radar speed extractor and the image speed extractor, and whether the speed information by the radar is included in the error range within the error range; ,

An average speed calculator 125 for calculating an average speed when the speed information determined by the double speed judging unit coincides or is within an error range;

Timer unit 130 for counting the date and time,

An information DB 135 for storing the obtained image, vehicle number, average speed, date, and time data;

It is configured to include an information transmitting unit 140 for transmitting the information stored in the information DB to the control center server in real time.

The radar speed extracting unit 105 obtains information on the emission point of the radiation wave and the reception point of the reflected wave from the radar, calculates distance information from which the vehicle is spaced from the radar, and extracts the speed information from the distance information.

Since the technique of measuring the speed using the radar is already known, a detailed description thereof will be omitted.

The image processing unit 110 recognizes the license plate from the acquired image, and determines the number and location of the license plate, the image speed extractor 115 is photographed at a predetermined time interval and the location and number of the identified license plate The vehicle speed is extracted from the pixel number data of an image.

Since the technique of extracting the vehicle speed using the pixel number data of the image is a known technique, a detailed description thereof will be omitted.

The double speed determination unit 120 obtains the speed information extracted by the radar speed extractor and the image speed extractor to determine whether the speed is consistent and whether the speed information by the radar is included in the error range within the error range. .

For example, if the speed by the radar is 100km and the speed by the video detection is 100km, the speed is the same.If the speed error range is set to ± 5 km, if the speed values exist within the range, it is judged as normal detection. Will be.

Therefore, the average speed calculator 125 calculates the average speed when the speed information determined by the double speed determination unit is identical or within an error range.

In other words, the average speed is 100 km.

In addition, the date and time are counted through the timer unit 130, and the image, vehicle number, average speed, date, and time data acquired under the control of a central controller (not shown) are stored in the information DB 135. Let's go.

Then, the information transmitting unit 140 is to transmit the information stored in the information DB to the control center server in real time.

3 is a block diagram of the control center server of the vehicle speed measurement system using the image and the radar according to an embodiment of the present invention.

As shown in Figure 3, the control center server 400,

A data acquisition unit 410 for acquiring the image, average speed, date, and time data transmitted from the image radar speed processing means;

And a data display unit 420 for displaying the vehicle number, average speed, date, and time data in a predetermined region on the vehicle image screen.

That is, the data acquisition unit 410 acquires the image, average speed, date, and time data transmitted from the image radar speed processing means, and the vehicle number, average speed, As shown in FIG. 4, date and time data are displayed in a predetermined area.

When configured as described above, it is possible to calculate the traffic situation information by calculating the speed of the various vehicles passing through the road, and the introduction of a high resolution camera and a high magnification lens automatically recognizes the license plates of various vehicles to speed up or crack down on criminal vehicles. It may be applied to a section crackdown, etc.

On the other hand, according to an additional aspect the image radar speed processing means 100,

An error processing unit 145 for processing as an error when the speed information determined by the double speed determination unit does not match and does not exist within an error range,

When the error processing unit is processed as an error may be configured to include a video speed sending unit 150 for extracting the speed information extracted by the video speed extracting unit to be sent to the information DB.

That is, the error processing unit 145 processes as an error when the speed information determined by the double speed determination unit does not match and does not exist within an error range.

Specifically, assuming that speed information does not match, if two speeds are out of the error range, they are treated as errors.

In this case, when the video speed transmitter 150 processes the error by the error processor, the video speed transmitter 150 extracts the speed information extracted by the video speed extractor and transmits the speed information to the information DB.

That is, in the case of radar, since scattering, reflection, and distortion of radio waves occur more frequently than image detection, it is determined that the image speed information is more accurate and transmits the corresponding speed information.

On the other hand, according to another additional aspect it may be configured to further include a radar detection distance correction unit 155 for correcting the radar detection distance in the case of exceeding a predetermined reference value by counting the number of errors processed by the error processing unit.

That is, if the number of errors exceeds 10 times in 10 minutes, a command to change the detection distance parameter is transmitted to the central control unit to correct the radar detection distance, and the central control unit automatically adjusts the detection distance of the radar.

For example, if the existing detection distance is set to 15 meters, the parameter information to set to 20 meters is sent out and corrected.

On the other hand, the control center server 400 according to an additional aspect of the present invention,

A normal speed color display unit 430 for displaying the normal speed in a specific color when the speed information determined by the double speed judging unit matches or is present within an error range,

If the speed information determined by the double speed determination unit does not match, and does not exist within the error range, it may further include an error speed color display unit 440 for displaying the error speed in a specific color.

That is, as shown in FIG. 4, the normal speed color display unit 430 displays the normal speed in a specific color when the speed information determined by the double speed judging unit matches or falls within an error range. In green.

In addition, the error speed color display unit 440 displays the error speed in a specific color when the speed information determined by the double speed judging unit does not match and does not exist within an error range. .

This is to provide the effect that the administrator can easily check the accuracy of the current radar speed detection by outputting the normal color and the error color to the screen so that the administrator can check whether the detection result is normal or abnormal. .

On the other hand, according to an additional aspect of the present invention, a laser pointer (not shown) for emitting a laser beam to confirm the detection area of the radar 300;

And a lens (not shown) coupled to the laser pointer to adjust the angle of the laser beam.

That is, as shown in FIG. 5, the laser pointer is configured on the structure to which the radar is coupled, and the lens for adjusting the angle in front of the laser point is configured.

Specifically, since radar is a device that transmits and receives radio waves, it has a characteristic that it is difficult to visually determine which direction it is facing exactly when installed in a specific area.

However, since the vertical and horizontal angles are fixed due to the characteristics of the antenna of the radar, it is not difficult to measure the area arbitrarily.

However, in order to know a more accurate area with the eye, it is easy to find out the area by using the laser having the straightness and the visible property.

Therefore, when the initial detection area is set, it is displayed by a laser so that the area can be confirmed.

When the radar is installed on the road structure, the detection area is invisible, so it is difficult to know whether only one lane is actually detected.

If the angle of the radar is slightly displaced, the object passing through the side lane may be detected, and incorrect data may enter.

Therefore, in order to easily know exactly where the radar detects when the initial radar is installed, when the Cross laser pointer is installed at the center of the radar as shown in FIG. Done.

In addition, for example, if the radar has a horizontal angle of 7 degrees, a radar having a 7-degree lens in front of the laser pointer may emit a laser beam at the same angle.

This will make it possible to more accurately determine the radar area and to prevent incorrect data from being output from the radar.

Through the above configuration and operation, the radar is emitted to measure the speeds of all vehicles driving in the detection zone, and at the same time, the image is taken through the camera to measure the speed through license plate recognition. By calculating the average speed of the dog and determining whether the vehicle is an overspeed vehicle, the speed error due to scattering, reflection, and distortion of the radar radio wave is removed to provide accurate speed information, thereby minimizing the error of the radar detection.

In addition, if the speed detected by the radar does not match the speed according to the video analysis and does not exist within the error range, it is treated as an error to send the speed according to the video analysis to the control center server, thereby eliminating the speed error. To provide.

Those skilled in the art to which the present invention pertains as described above may understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not restrictive.

The scope of the invention is indicated by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the invention. do.

100: image radar speed processing means
200: camera unit
300 radar
400: control center server

Claims (5)

In the vehicle speed measurement system using the image and the radar,
A radar (300) for emitting radiation on the road and receiving reflected waves reflected from a vehicle traveling on the road;
A camera unit 200 for capturing a vehicle detected by the radar to obtain an image;
A radar speed extracting unit 105 for extracting velocity information from distance information from the radar by obtaining emission point information of the emission wave and reception time point of the reflected wave from the radar, and extracting the velocity information from the distance information;
An image processor 110 for recognizing a license plate from the acquired image and determining a number and a location of the license plate;
An image speed extraction unit 115 for extracting a vehicle speed based on the determined position and number of the license plate and pixel number data of an image photographed at a predetermined time interval;
Both speed determining unit 120 for determining whether the speed is matched by obtaining the speed information extracted by the radar speed extractor and the image speed extractor, and whether the speed information by the radar is included in the error range within the error range; ,
An average speed calculator 125 for calculating an average speed when the speed information determined by the double speed judging unit coincides or is within an error range;
Timer unit 130 for counting the date and time,
An information DB 135 for storing the obtained image, vehicle number, average speed, date, and time data;
Image radar speed processing means (100) comprising an information transmitting unit (140) for transmitting information stored in the information DB to a control center server in real time;
A data acquisition unit 410 for acquiring an image, an average speed, a date, and time data sent from the image radar speed processing means;
And a control center server 400 including a data display unit 420 for displaying a vehicle number, average speed, date, and time data on a predetermined region on the vehicle image screen. And a vehicle speed measurement system using radar.
The method of claim 1,
The image radar speed processing means 100,
An error processing unit 145 for processing as an error when the speed information determined by the double speed determination unit does not match and does not exist within an error range,
In the case of processing as an error by the error processor, the video speed extractor 150 extracts the speed information extracted by the video speed extractor and transmits the information to the video. Vehicle speed measurement system.
The method of claim 1,
The image radar speed processing means 100,
An error processing unit 145 for processing as an error when the speed information determined by the double speed determination unit does not match and does not exist within an error range,
An image speed sending unit 150 for extracting velocity information extracted by the image speed extracting unit and transmitting the extracted speed information to the information DB when the error processing unit processes the error;
The vehicle using the image and radar, characterized in that it further comprises a radar detection distance correction unit 155 for correcting the radar detection distance when counting the number of errors processed by the error processing unit exceeds a predetermined reference value Speed measurement system.
The method of claim 1,
The control center server 400,
A normal speed color display unit 430 for displaying the normal speed in a specific color when the speed information determined by the double speed judging unit matches or is present within an error range,
The speed information determined by the positive speed judging unit does not match, and the image is characterized in that it further comprises an error speed color display unit 440 for displaying the error speed in a specific color if not present within the error range And a vehicle speed measurement system using radar.
The method of claim 1,
Detecting area of the radar 300,
A laser pointer (not shown) for emitting a laser beam to check;
A lens (not shown) coupled to the laser pointer to adjust the angle of the laser beam; Vehicle speed measurement system using an image and radar, characterized in that it further comprises.

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