KR101755328B1

KR101755328B1 - portable speed enforcement apparatus using dual laser technology

Info

Publication number: KR101755328B1
Application number: KR1020150165509A
Authority: KR
Inventors: 유호진; 박진용
Original assignee: 컴레이저 (주)
Priority date: 2015-11-25
Filing date: 2015-11-25
Publication date: 2017-07-07
Also published as: KR20170060824A

Abstract

The present invention provides a laser transmitter, a laser receiver, a camera, a monitor, and a controller which are integrated into one body, thereby simplifying the portable and installation, facilitating installation, reducing cost, (L1) and (L2), the speed detection accuracy and reliability are increased, and it is determined whether or not an error has occurred in detecting the speed of the error verification part. At the same time, the error correction part compares with the previous speed It is possible to further improve detection accuracy and accuracy by separately detecting the focus value corresponding to the difference in distance from the overspeed vehicle upon detection of an overspeed vehicle and focusing the camera according to the detected focus value, A mobile speed detector using dual laser technology that can increase the sharpness and intermittent reliability of acquired images. One will.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a portable speed detector using dual laser technology,

The present invention relates to a mobile speed detector using dual laser technology. More specifically, the present invention relates to a mobile speed detector for detecting a laser beam by receiving a pair of laser beams with a single light receiving unit, To a portable speed detector using laser technology.

Intelligent Transportation Systems (ITS) is interdependently linked to traffic data, information processing, and information provision. It collects data through on-site equipment such as speed detector, Automatic Vehicle Identification (AVI) The accuracy of the data collected and detected by the equipment directly affects the traffic information quality. Especially, the speed detector is directly connected to the complaint when the speed detection is inaccurate, so high-performance equipment with excellent precision and accuracy is required.

Since a laser signal has a large energy density, is strong in interference and is stable in wavelength and phase, and has a good linearity and light-gathering property, a detector using a laser signal (hereinafter referred to as a laser detector) is widely used. Therefore, they are classified into fixed type detectors and mobile type detectors.

In particular, mobile (portable) type detectors are widely used for the purpose of controlling speeding vehicles because they are easy to move and are simple to install.

1 is a view showing a conventional portable type speed detector.

1, a conventional portable speed enforcement apparatus 200 includes a speed detecting device 210, a photographing device 220, a communication and output device 230, a battery 240, Device 250, which are connected by a data cable.

The speed detection device 210 detects the speed of the vehicle by analyzing the laser signals transmitted and received through the transmission section that transmits the laser signal, the reception section that receives the transmitted and reflected laser signal, And comparing the detected speed with a predetermined limit speed or more to determine whether the vehicle is overspeed.

The photographing apparatus 220 includes a camera and a lens to acquire images or photographs of the overspeed vehicle, and displays the obtained images or photographs including the monitor.

The communication and output device 230 transmits the acquired image to the outside, and performs a function of issuing a bill for the overspeed vehicle.

The conventional portable speed detector 200 configured as described above can detect the speed of the traveling vehicle using one laser signal through the speed detecting device 210 and can detect the speed of the traveling vehicle through the photographing device 220 However, since each of the constituent units 210, 220, 230, 240, and 250 is independently manufactured, unnecessary space consumption is large and installation and movement are inconvenient And preparation and installation work for interlocking each constituent means are complicated and cumbersome, there arises a problem of compatibility of the equipments, and there is a disadvantage that the cost is wasted.

In addition, since the conventional portable speed detector 200 is connected to each of the components 210, 220, 230, 240, and 250 through a data cable, not only does appearance deteriorate, So that there is a problem that the convenience of the operator or the like, such as disconnection of the cable due to external vibration, is low.

Generally, speed detection using a laser signal has sufficient room for error detection in speed detection depending on the interference by a vehicle in another lane and an external environment. However, the conventional portable speed detector 200 uses only one laser signal The accuracy and accuracy of the speed detection are deteriorated due to the detection of the speed, thereby complaints are frequently received and the reliability of the overspeed detection is deteriorated.

Further, the conventional portable speed detector 200 does not include means for verifying whether an error has occurred in the detection speed at the time of speed detection and means for correcting it when it is judged that an error has occurred, do.

Korean Patent No. 10-0877175 discloses a data acquisition system for transmitting and receiving a pair of laser signals and detecting velocities using each laser signal in a data acquisition system related to a fixed traveling vehicle using laser , The data acquisition system is configured to simply detect data by averaging the data detected by each laser signal so that it can not be determined whether or not an error has occurred in the detection speed and the detection speed can not be corrected in the event of an error The accuracy and precision of the speed detection are lowered.

In addition, since the data acquisition system is configured to perform only an overspeed vehicle detection function, it is cumbersome to operate and install a separate photographing system for photographing an overspeed vehicle, or to interwork with a photographing system installed in a place, There is a problem in compatibility of the equipment, and the cost is high.

2) it has excellent accuracy and precision by detecting velocity using a pair of laser signals; and 3) velocity detection when speed detection is performed. A portable speed enforcement apparatus capable of further improving the accuracy and accuracy of the speed detection by constructing a verification function for determining whether an error has occurred in itself and a correction function for correcting the error in case of an error, It is urgent.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a laser transmitter, a laser receiver, a camera, a monitor and a controller integrally manufactured, And to provide a mobile speed detector excellent in aesthetics.

Another object of the present invention is to provide a portable speed detector capable of increasing the accuracy and reliability of speed detection by detecting a speed using a pair of laser signals (L1, L2).

Another object of the present invention is to provide a portable speed detector capable of minimizing cost by being configured to receive a pair of laser signals (L1, L2) through one receiver.

Another object of the present invention is to provide a method and apparatus for determining whether an error has occurred in detecting a speed when a speed is detected, and at the same time, when an error occurs, the error correction unit compares the error with a previous speed, And to provide a portable speed detector that can be improved.

Further, another object of the present invention is to separately detect a focus value corresponding to a distance difference from a speeding vehicle when an overspeed vehicle is detected, focus on the camera according to the detected focus value, In order to provide a portable speed detector capable of increasing the speed of the vehicle.

According to an aspect of the present invention, there is provided a portable speed detector for interrupting an overspeed vehicle, comprising: a body in which a power unit, an electric element, and an electric circuit are installed; (Ln) installed inside the body so that an end portion is formed on the front surface of the body, the laser transmitting portions transmitting a plurality of laser signals (L1, ..., Ln); A laser receiving unit installed inside the body so that an end portion is formed on the front surface of the body, the laser receiving unit receiving signals transmitted and reflected by the laser transmitting units; A camera installed inside the body such that a lens is exposed on a front surface of the body; A vehicle speed calculation section for calculating the speed of the passing vehicle C by analyzing the transmitted and received laser signals, and an overspeed judging section for comparing the vehicle speed v calculated by the vehicle speed calculating section with the limiting speed, And a controller configured to generate a trigger signal for driving the camera when the overspeed vehicle is detected by the overspeed determiner and to input the generated trigger signal to the camera, The laser receiving unit and the camera are integrally manufactured, and the vehicle speed calculating unit includes: a signal analyzing module for analyzing each of the laser signals L1, ..., Ln; (V1), ..., (vn) utilizing analysis data of each of the laser signals (L1), ..., (Ln) analyzed by the signal analysis module field; And a vehicle speed determination module that calculates an average value of the vehicle speeds detected by the vehicle speed calculation modules and determines the calculated average value as the vehicle speed v.

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Further, in the present invention, the controller may further include an error verifying unit driven when the overspeed vehicle is detected by the overspeed determining unit, wherein the error verifying unit verifies the vehicle speed v1 calculated by the vehicle speed calculating modules, defined as a maximum speed difference value that can be used to determine that each error absolute value (? v) calculated after calculating the absolute difference values (? v) (V1), ..., (vn) are detected when any of the absolute values of the differences is equal to or greater than the first set value TH1 (TH1, Threshold1) .

The controller may further include an error correction unit that is driven when the error is verified by the error verification unit. The error correction unit may further include an error correction unit that corrects the vehicle speed v1, , vn of the previous vehicle and the vehicle speed v 'of the previous vehicle, and then calculates the absolute difference between the calculated absolute values of the differences in the vehicle speed v' To a second set value TH2 (Threshold) which is a difference value; And a vehicle speed correction module for correcting, by the comparison module, the vehicle speed at which the difference absolute value is less than the second set value (TH2) to the vehicle speed (v), wherein the controller The corrected vehicle speed is re-input to the overspeed determining unit to determine whether the vehicle is overspeed. When it is determined that the vehicle speed corrected by the overspeed determining unit is an overspeed, the passing vehicle C is finally determined as a speeding vehicle .

In the present invention, the camera management unit may include a distance value calculation module that calculates a distance value d by using analysis data of each of the laser signals (L1), ..., (Ln) analyzed by the signal analysis module ; A focus value detection module for detecting a focus value corresponding to the distance value d calculated by the distance value calculation module; A focusing control module focusing the focus of the camera according to a focus value detected by the focus value detection module; And a trigger signal generator for generating a trigger signal for driving the camera when focusing is completed by the focusing control module.

Also, in the present invention, the distance value calculation module may search the mapping table, which is data in which the camera focus value for each distance difference from the vehicle is matched, to detect a focus value corresponding to the distance value d.

Also, in the present invention, the reflection points of the laser signals L1, ..., Ln are preferably formed to be spaced apart in the width direction of the same lane.

In addition, in the present invention, the portable speed detector may further include a monitor installed on a rear surface of the body and displaying an image photographed by the camera.

According to the present invention having the above-mentioned problems and solutions, the laser transmitter, the laser receiver, the camera, the monitor and the controller are integrally manufactured so that they can be easily carried and installed, can be easily installed, cost can be reduced, great.

According to the present invention, the speed is detected using a pair of laser signals (L1, L2) to improve the accuracy and reliability of the speed detection, and it is determined whether an error has occurred in the speed detection by the error verification unit, The error correcting unit corrects the error through comparison with the previous speed, thereby further improving the detection accuracy and accuracy.

According to the present invention, the focus value corresponding to the distance difference d with the overspeed vehicle is detected separately when the overspeed vehicle is detected, and the camera is focused according to the detected focus value, It is possible to increase the intermittent reliability.

1 is a view showing a conventional portable type speed detector.
2 is a perspective view illustrating a portable speed enforcement device according to an embodiment of the present invention.
Fig. 3 is a perspective view of Fig. 2 viewed from different angles. Fig.
4 is a front view of Fig.
FIG. 5 is an exemplary view showing a state in which the movable speed detector of FIG. 2 is installed.
Fig. 6 is a block diagram showing a controller installed inside the movable speed detector of Fig. 2; Fig.
7 is a block diagram showing the vehicle speed calculating unit of Fig.
8 is an exemplary diagram showing laser signals L1 and L2 of the present invention.
FIG. 9 is a block diagram showing the error correcting unit of FIG. 6. FIG.
10 is a block diagram showing a camera management unit.

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

2 is a perspective view showing a portable speed enforcement device according to an embodiment of the present invention, FIG. 3 is a perspective view of FIG. 2 viewed from another angle, FIG. 4 is a front view of FIG. 2, Fig. 8 is an exemplary view showing a state where a portable speed detector is installed.

As shown in FIG. 5, the mobile speed detector 1 is installed on the road surface of the road S and collects reflected signals after transmitting a pair of laser signals (dual laser beams) The speed of the passing vehicle C is detected, the speeding vehicle is detected, and it is determined whether an error has occurred in the speed detected when the overspeed vehicle is detected. When it is determined that an error has occurred, the detection speed is corrected, It is a device to capture a speeding car and to acquire an image at the final judgment of the vehicle.

At this time, the laser signals L1 and L2 are transmitted so as to be spaced apart in the width direction of the lane.

2 to 4, the moving speed detector 1 includes a power source for emitting laser signals L1 and L2, an electric element, an electric circuit, and a controller 10 of FIG. 6 to be described later And a laser transmission unit (not shown) which transmits laser signals L1 and L2 and is disposed inside the body 2 and whose ends are exposed on the front face 21 of the body 2, 4 and 5 and the laser signals L1 and L2 transmitted by the laser transmission units 4 and 5 so that the ends of the laser signals L1 and L2 are received inside the body 2, A laser receiver 3 exposed to the front surface 21 of the body 2 and a trigger signal generated from a controller (not shown) to acquire images of the speeding vehicle and to be installed inside the body 2 A high resolution camera 7 in which an end portion is exposed on the front face 21 of the body 2 and an image picked up by the high resolution camera 7 are displayed, And a monitor (9) provided on the surface (22).

At this time, although not shown in the drawing, the mobile speed sensor 1 is further coupled to the lower side of the body 2 and is also seated on the ground to further include a common support portion for firmly fixing and supporting the body 2 on the ground.

The laser transmission units 4 and 5 are installed inside the body 2 and have end portions connected to the front surface 21 of the body 2. [ At this time, the laser transmission units 4 and 5 are installed such that end portions connected to the front surface 21 of the body 2 are vertically spaced from each other.

The laser transmission units 4 and 5 transmit the laser signals L1 and L2, respectively. At this time, the laser signals L1 and L2 are emitted to the road S so as to be spaced apart from each other in the width direction of the lane.

The laser receiving unit 3 receives the laser signals L1 and L2 emitted by the laser transmitting units 4 and 5.

The camera (7) captures images under the control of the controller (10) to acquire images of the overspeed vehicle.

The camera 7 is installed inside the body 2 and the lens region is connected to the front face 21 of the body 2. [

The body 2 is provided with a power supply unit for driving the laser transmission units 4 and 5, a laser reception unit 3, a camera 7 and a monitor 9, an electric device, an electric circuit, to be. The constituent means such as a pulse generating unit, a laser diode, a pulse receiving unit, an avalanche photo diode (APD), and an amplifier for driving the laser transmitting units 4 and 5 and the laser receiving unit 3 are commonly used in a laser transceiver The detailed description will be omitted, and the controller will be described later in detail with reference to FIGS. 6 to 10. FIG.

The body 2 is connected to the front end of the laser transmission units 4 and 5, the laser reception unit 3 and the cameras 7 on the front side and the monitor 9 is installed on the rear side.

The movable speed detector 1 according to an embodiment of the present invention configured as described above includes a pair of laser transmission units 4 and 5 to analyze a pair of laser signals L1 and L2, This makes it possible to increase the accuracy and precision of speed detection and to improve the portability as well as to simplify installation and operation as a result of miniaturization of various constituting means. Thus, the cable is not exposed to the outside, It has excellent advantages.

Fig. 6 is a block diagram showing a controller installed inside the movable speed detector of Fig. 2; Fig.

6 includes a control unit 101, a memory 102, a communication interface unit 103, a laser control unit 104, a vehicle speed calculation unit 105, an overspeed determination unit 106, An error correction unit 107, a error correction unit 108, and a camera management unit 109.

Although the controller 10 has been described as being integrated into the body 2 for the sake of convenience, the controller 10 may be manufactured independently, and when it is manufactured independently, A built-in personal computer (PC), called embedded, or software necessary for a notebook.

The control unit 101 is an OS (Operating System) of the controller 10. The control unit 101 is a control object 102, 103, 104, 105, 106, 107, 108, Lt; / RTI >

The control unit 101 also inputs the laser signals transmitted and received by the laser control unit 104 to the vehicle speed calculation unit 105.

When the vehicle speed v is calculated by the vehicle speed calculating unit 105, the control unit 101 inputs the calculated vehicle speed v to the overspeed determining unit 106, and the overspeed determining unit 106 And drives the error verifying unit 107 when an overspeed vehicle is detected.

Further, if it is determined by the error verification unit 107 that no error has occurred in the speed detection of the overspeed vehicle, the control unit 101 determines the vehicle speed v calculated by the vehicle speed calculation unit 105 as the final speed If it is determined by the error verification unit 107 that an error has occurred in the speed detection of the overspeed vehicle, the error correction unit 108 is driven to correct the error.

Further, when the error is corrected by the error correction unit 108, the control unit 101 inputs the corrected vehicle speed v again to the vehicle speed calculation unit 105 so that the overspeed is determined again according to the corrected speed, When it is determined that the speed corrected by the overspeed determining unit 106 is an overspeed, the vehicle is finally determined as a speeding vehicle and the corrected vehicle speed is determined as the final speed.

Further, when the overspeed vehicle is determined, the control unit 101 drives the camera management unit 109.

The memory 102 stores the information of the laser signals L1 and L2 transmitted and received by the laser control unit 104 and the vehicle speed information calculated by the vehicle speed calculation unit 105 by the control unit 101 The speeding vehicle information finally determined and the image information acquired by the photographing of the camera 7 are stored.

The memory 102 also stores a predetermined first set value TH1 and a preset second set value TH2. At this time, the first set value TH1 is defined as a maximum speed difference value that can determine that no error has occurred, and the second set value TH2 is defined as the maximum speed difference with the previous vehicle that can determine that no error has occurred Value.

In the memory 102, a pre-built mapping table is stored. At this time, the mapping table is defined as matching data of the camera focus value of the distances different from the vehicle.

The laser control unit 104 includes a pulse generating unit for controlling and controlling the laser transmitting units 4 and 5 and the laser receiving units 3 and for driving them, a laser diode, a pulse receiving unit, an avalanche photo diode ), An amplifier, and the like.

The laser control unit 104 inputs the received laser signals L1 and L2 to the control unit 101 and the control unit 101 outputs the laser signals L1 and L2 input from the laser control unit 104 And inputs it to the vehicle speed calculation unit 105. [

Fig. 7 is a block diagram showing the vehicle speed calculating unit of Fig. 6, and Fig. 8 is an exemplary diagram showing laser signals L1 and L2 of the present invention.

7 includes a signal analysis module 151 for analyzing the inputted laser signals L1 and L2 and a data analyzing module 151 for analyzing the data of the laser signal L1 analyzed by the signal analysis module 151 A first vehicle speed calculation module 153 for calculating a first vehicle speed v1 that is a vehicle speed measured by the laser signal L1 by utilizing the first laser beam L2 A second vehicle speed calculation module 155 for calculating a second vehicle speed v2 that is a vehicle speed measured by the laser signal L2 using data of the first and second vehicle speed calculation modules 153 and 153, And a vehicle speed determination module 157 that calculates an average value of the vehicle speeds v1 and v2 calculated by the vehicle speeds v1 and v2 and determines the calculated average value as the vehicle speed v of the passing vehicle.

Since the method of calculating the vehicle speed using the transmitted and received laser signals is a technique commonly used in the vehicle speed detecting system, a detailed description thereof will be omitted.

8, the pair of laser signals L1 and L2 are emitted and the emitted laser signals L1 and L2 are emitted so as to be spaced apart in the width direction of the lane. As a result, To the left side and the right side of the front surface of the liquid crystal display panel (C).

The first vehicle speed calculation module 153 utilizes the data of the laser signal L1 analyzed by the signal analysis module 151 to calculate the first vehicle speed v1 which is the vehicle speed measured by the laser signal L1 .

The second vehicle speed calculation module 155 utilizes the data of the laser signal L2 analyzed by the signal analysis module 151 to calculate the second vehicle speed v2 which is the vehicle speed measured by the laser signal L2 .

The vehicle speed verification module 157 compares the first vehicle speed v1 calculated by the first vehicle speed calculation module 153 with the second vehicle speed v2 calculated by the second vehicle speed calculation module 155 And the calculated average value is determined as the vehicle speed (v) of the passing vehicle (C).

The vehicle speed v detected by the vehicle speed determination module 157 of the vehicle speed calculation unit 105 is input to the overspeed determination unit 106 under the control of the control unit 101. [

The overspeed determination section 106 compares the vehicle speed v input from the vehicle speed calculation section 105 with a predetermined limit speed and if the vehicle speed v exceeds the limit speed, It is judged as a vehicle.

When the overspeed determining section 106 determines that the passing vehicle C is an overspeed vehicle, the control section 101 drives the error verifying section 107 and simultaneously sets the first vehicle speed v1 of the passing vehicle and the 2 vehicle speed v to the error verification unit 107. [

The error verifying unit 107 compares an absolute value of difference v between the inputted first vehicle v1 and the second vehicle speed v2 with a preset first set value TH1. At this time, the first set value TH1 is defined as a maximum speed difference value that can be determined that no error has occurred.

The error verifying unit 107 also detects the first vehicle speed v1 or the first vehicle speed v2 when the difference absolute value DELTA v between the first and second vehicle speeds v1 and v2 is equal to or greater than the first set value TH1 It is determined that an error has occurred in detecting the second vehicle speed v2. The controller 101 inputs the first and second vehicle speeds v1 and v2 to the error corrector 108 when it is determined that the error has occurred in the vehicle speed detection by the error verifier 107 When it is determined by the error verifying unit that no error has occurred in the vehicle speed detection, the vehicle is determined as the overspeed vehicle and the vehicle speed v is determined as the speed of the overspeed vehicle.

For example, when the first set value TH1 is set to 5 km / h, the first vehicle speed v1 of the vehicle 'A' is' 82 km / h 'and the second vehicle speed v2 is' The error verification unit 107 determines that the difference absolute value (12 km / h = 82 km / h - 70 km / h) of the first and second vehicle speeds (v1) and (v2) It is judged that an error has occurred in the first vehicle speed v1 or the second vehicle speed v since it is larger than the set value (5 km / h).

FIG. 9 is a block diagram showing the error correcting unit of FIG. 6. FIG.

The error correction unit 108 of FIG. 9 is driven when an error is detected in the vehicle speed detection by the error verification unit 107, and the error correction unit 108 of FIG. 9 selects either the first or second vehicle speeds v1 and v2 One is determined as the speed of the passing vehicle (C).

The error correction unit 108 further includes a data search module reading module 181 for searching for vehicle speed information stored in the memory 102 and reading the vehicle speed v 'of the preceding driving vehicle from the memory 102, A difference absolute value calculation module 183 for calculating absolute differences between the first and second vehicle speeds v1 and v2 and the vehicle speed v 'read by the data reading module 181, A comparison module 185 for comparing the difference absolute value calculated by the difference absolute value calculation module 183 with a predetermined second set value TH2 to compare whether the difference absolute value is less than the second set value TH2, And a vehicle speed correction module 187 that corrects the vehicle speed at which the difference absolute value is less than the second set value TH2 by the comparison module 185 to the vehicle speed of the driving vehicle. At this time, the second set value TH2 is defined as a maximum speed difference value with the preceding vehicle that can determine that no error has occurred.

As described above, in the present invention, not only the accuracy and reliability of the speed detection can be increased by detecting the vehicle speeds v1 and v2 using the pair of laser signals L1 and L2, (v2) to determine whether an error has occurred in detecting the vehicle speed. When it is determined that an error has occurred, the vehicle data in which no error has occurred in the vehicle data is detected based on the speed of the previous vehicle, Can be further improved.

10 is a block diagram showing a camera management unit.

The camera management unit 109 of FIG. 10 is driven when the final overspeed vehicle is detected by the control unit 101, and captures the detected overspeed vehicle to acquire an image. At this time, the control unit 101 inputs analysis data of the laser signals L1 and L2 analyzed by the signal analysis module 151 of FIG. 7 to the camera management unit 109 as described above.

The camera management unit 109 includes a distance value calculation module 191, a focus value detection module 193, a focusing control module 195, and a trigger signal generation module 197.

The distance value calculation module 191 calculates the distance value to the passing vehicle C by using the analysis data of the input laser signals L1 and L2.

The focus value detection module 193 searches for a predetermined mapping table and detects a focus value corresponding to the distance value d calculated by the distance value calculation module 191. [ At this time, the mapping table is defined as matching data of the camera focus value of the distances different from the vehicle.

The focus value detected by the focus value detection module 193 is input to the focusing control module 195 under the control of the control unit 101. [

The focusing control module 195 functions to control the focus of the camera 7 and focuses the focus of the camera 7 according to the focus value input from the focus value detection module 193. [

At this time, various methods known in the art can be applied to the configuration and method of controlling the focus of the camera 7 by the focusing control module 195.

When the focusing of the camera 7 is completed by the focusing control module 195, the trigger signal generation module 197 is driven under the control of the control unit 101.

The trigger signal generation module 197 generates a trigger signal for driving the photographing of the camera 7.

The trigger signal generated by the trigger signal generation module 197 is transmitted to the photographing device 7, and the photographing device 7 performs photographing.

Generally, since the laser signal has the characteristic that the light is diffused in proportion to the emission distance and the cross-sectional area increases, the cross-sectional area of the light at the reflection point (P) It is excessively increased in comparison with the cross-sectional area.

In other words, the laser signal forms a point at the time of emission, but the light emitted from the reflection point P is diffused to form a cross-sectional area having a large radius of about 40 m, The maximum difference is 40m.

At this time, the camera has a predetermined focal point corresponding to a predetermined distance, but the distance may have a difference of 40 m from the vehicle, so that when the distance difference occurs, the camera does not focus, The sharpness of the image is lowered.

That is, the camera management unit 109 of the present invention solves this problem. The camera management unit 109 separately calculates a distance difference from the overspeed vehicle, detects a focus value corresponding to the distance difference d, 7), it is possible to dramatically increase the quality of the acquired image.

The movable speed detector 1, which is an embodiment of the present invention configured as described above, has a laser transmitter, a laser receiver, a camera, a monitor and a controller integrated into one body, .

Further, according to the present invention, the speed is detected using a pair of laser signals (L1) and (L2) to increase the accuracy and reliability of the speed detection, and it is determined whether an error has occurred in detecting the speed of the error- The error correction unit can further improve the detection accuracy and precision by correcting the error through comparison with the previous speed.

Further, according to the present invention, a focus value corresponding to a distance difference (d) between the overspeed vehicle and an overspeed vehicle is detected separately, and the camera is focused according to the detected focus value, The reliability can be increased.

1: Movable speed detector 2: Body 3: Laser receiver
4, 5: laser transmission unit 7: camera 9: monitor
10: controller 101: control unit 102: memory
103: Communication interface unit 104: Laser control unit 105: Vehicle speed calculation unit
106: overspeed determination unit 107: error verification unit 108: error correction unit
109: camera management unit 151: signal analysis module
153: First vehicle speed calculation module 155: Second vehicle speed calculation module
157: Vehicle speed determination module 181: Data reading module
183: Difference absolute value calculation module 185: Comparison module 187: Vehicle speed determination module
191: Distance value calculating module 193: Focus value detecting module 195: Focusing control module
197: Trigger signal generation module

Claims

A portable speed detector for interrupting a speeding vehicle, comprising:
A body in which a power unit, an electric element, and an electric circuit are installed;
(Ln) installed inside the body so that an end portion is formed on the front surface of the body, the laser transmitting portions transmitting a plurality of laser signals (L1, ..., Ln);
A laser receiving unit installed inside the body so that an end portion is formed on the front surface of the body, the laser receiving unit receiving signals transmitted and reflected by the laser transmitting units;
A camera installed inside the body such that a lens is exposed on a front surface of the body;
A vehicle speed calculation section for calculating the speed of the passing vehicle C by analyzing the transmitted and received laser signals, and an overspeed judging section for comparing the vehicle speed v calculated by the vehicle speed calculating section with the limiting speed, And a camera management unit configured to generate a trigger signal for driving the camera when the overspeed vehicle is detected by the overspeed determination unit and input the generated trigger signal to the camera,
Wherein the controller, the laser transmitting units, the laser receiving unit, and the camera are integrally manufactured,
The vehicle speed calculation unit
A signal analysis module for analyzing each of the laser signals L1, ..., Ln;
(V1), ..., (vn) utilizing analysis data of each of the laser signals (L1), ..., (Ln) analyzed by the signal analysis module field;
Further comprising: a vehicle speed determination module that calculates an average value of the vehicle speeds detected by the vehicle speed calculation modules and determines the calculated average value as the vehicle speed (v).

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The vehicle control system according to claim 1, wherein the controller further includes an error verifying unit that is driven when the overspeed vehicle is detected by the overspeed determining unit,
The error verifying unit
The difference absolute values? V calculated after calculating the difference absolute values? V of the vehicle speeds v1, ..., vn calculated by the vehicle speed calculation modules are used as errors (TH1, Threshold1), which is defined as a maximum speed difference value that can be determined not to have occurred, and if any one of the difference absolute values is greater than or equal to the first set value TH1, v1), ..., (vn) are detected.

The apparatus according to claim 3, wherein the controller further includes an error correction unit that is driven when an error is detected by the error verification unit,
The error correction unit
(V1), ..., (vn) judged by the error verification unit to have generated an error and the vehicle speed v 'of the previous vehicle, To a second set value (TH2, Threshold), which is a maximum speed difference value with a previous vehicle that can be determined that no error has occurred.
And a vehicle speed correction module that corrects, by the comparison module, the vehicle speed at which the difference absolute value is less than the second set value (TH2) to the vehicle speed (v)
Wherein the controller re-inputs the corrected vehicle speed to the overspeed determiner when the vehicle speed is corrected by the vehicle speed correction module, and determines whether the vehicle speed is overspeed. If it is determined that the vehicle speed corrected by the overspeed determiner is overspeed And finally determines the passing vehicle (C) as an overspeed vehicle.

The apparatus of claim 1, wherein the camera management unit
A distance value calculation module for calculating a distance value d by using analysis data of each of the laser signals (L1), ..., (Ln) analyzed by the signal analysis module;
A focus value detection module for detecting a focus value corresponding to the distance value d calculated by the distance value calculation module;
A focusing control module focusing the focus of the camera according to a focus value detected by the focus value detection module;
And a trigger signal generator for generating a trigger signal for driving the camera when focusing is completed by the focusing control module.

The distance value calculation module searches for a mapping table in which a distance-based camera focus value is matched data, and detects a focus value corresponding to the distance value (d). Speed detector.

7. The optical pickup device according to any one of claims 1 to 6, wherein reflection points of the laser signals (L1), ..., (Ln) are formed so as to be spaced apart in the width direction of the same lane A portable speed detector.

The portable speed detector according to claim 7, wherein the portable speed detector further comprises a monitor installed on a rear surface of the body and displaying an image photographed by the camera.