CN102708694B - Automatic motorcycle type identification system and method based on high-speed pulse laser scanning - Google Patents

Abstract

The invention relates to a vehicle type automatic identification system and method based on high-speed pulsed laser scanning, and belongs to the technical field of intelligent traffic management equipment and methods. The vehicle type automatic identification system of the present invention includes a high-frequency laser ranging module, a vehicle outline drawing module and a vehicle type identification module, and the high-frequency laser ranging module and the vehicle outline drawing module are vertically arranged above the lane. Using the method of the present invention, the high-frequency laser ranging module performs real-time pulse laser ranging and sends the distance value to the vehicle contour drawing module; the vehicle contour drawing module draws the distance parameter scan diagram in real time and sends it to the vehicle type identification module; the vehicle type identification module Car model recognition is realized according to the vehicle profile information on the distance parameter scanning map, thereby effectively overcoming the defects in the prior art, and providing a car model automatic recognition with simple setting and maintenance, low cost, high car model recognition rate and wide application range systems and methods.

Description

Vehicle model automatic recognition system and method based on high-speed pulsed laser scanning

technical field

The invention relates to the technical field of intelligent traffic management equipment, in particular to the technical field of vehicle identification, in particular to a vehicle automatic identification system and method based on high-speed pulsed laser scanning.

Background technique

With the increasingly prominent problems of traffic congestion and congestion, as well as the continuous development of computer technology, Intelligent Transportation System (ITS) has been more and more widely used, and is widely used in developed countries such as Europe and the United States. It has been applied, but the application in our country is still in the initial stage of exploration and research. Vehicle detection, tracking and vehicle identification are important branches in the application field of ITS, and they are also relatively weak technical links at present.

Vehicle type automatic identification is the premise of ITS for vehicle classification management and monitoring, and combined with the vehicle license plate recognition function, it can fully grasp the driving information of road vehicles and provide a strong guarantee for intelligent traffic management.

At present, there are mainly the following types of automatic vehicle identification methods:

1. Electronic label identification method

At this stage, non-stop charging (ETC) is mostly based on wireless communication technology. The electronic tag is used to record the information of the vehicle itself, including the vehicle account number, vehicle type, owner, license plate number, etc. When the vehicle passes through the charging equipment installed in the toll channel, the information exchange is realized through the microwave communication between the electronic tag and the reader, and the CRC check is performed, and finally the regular settlement is carried out with the owner's bank through the charging system. Because there is a possibility of cheating by swapping the on-board electronic tags, toll stations and other places need to install additional monitoring equipment, which increases infrastructure investment.

2. Electromagnetic induction coil identification method

Lay a coil with high-frequency current under the road in advance. Since the vehicle is mostly made of metal, when the vehicle passes over the induction coil, eddy current will be generated inside the coil to reduce the inductance of the coil. The chassis structure and ferromagnetic material distribution of different models are different, and the change of the magnetic field caused by the change of current is also different. Therefore, different types of vehicles can be distinguished according to the difference in the induction curve, and then the specific model can be obtained. The advantage of this method is that it has high accuracy, is not affected by the climate, and the cost is not too high. At the same time, it can also detect traffic parameters such as traffic volume and occupancy rate of various models. The electromagnetic induction coil method needs to bury the coil underground, which is easily damaged by the extrusion of the vehicle, has a short life, and needs to destroy the road surface during maintenance, resulting in high maintenance costs.

3. License plate recognition method

The license plate recognition method is a method of indirect identification of vehicle types by recognizing license plates. First, identify the license plate number and license plate color from the license plate image captured by the camera, then search the vehicle model corresponding to the license plate number in the vehicle database, and finally get the type of vehicle. This method does not require high hardware and is flexible and convenient to install. However, it is necessary to establish a vehicle database containing various information for each vehicle in advance, and the image must ensure that the license plate is clear. In practical applications, it is also limited by occlusion, lighting, etc. .

4. Vehicle identification based on video images

At home and abroad, there are many researches on the use of video images for car model recognition, because digital images can provide a lot of useful information, using certain algorithms to obtain information about many vehicles, and then get specific car models based on these vehicle features. Compared with other car model recognition methods, image recognition has its own disadvantages. First, the digital image cannot be clearly obtained, and then it is difficult to ensure the effectiveness of the feature extraction algorithm, so that a reliable car model recognition rate cannot be guaranteed.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcoming in the prior art, provide a kind of technology based on laser high-speed pulse scanning, carry out ranging scanning to the different parts of passing vehicle, collect the side profile data of vehicle, then pass these data and model database The vehicle type automatic identification system and method based on high-speed pulsed laser scanning can be realized by comparing the data in the vehicle, and the recognition rate is high, the setting and maintenance are simple, the cost is low, and the application range is wide.

In order to achieve the above-mentioned purpose, the present invention has the following composition based on the vehicle type automatic identification system of high-speed pulsed laser scanning:

The system includes a high-frequency laser ranging module, a vehicle contour drawing module and a vehicle type identification module. The high-frequency laser ranging module and the vehicle contour drawing module are arranged above the vehicle lane, and the high-frequency laser ranging module The laser pulse emission port is perpendicular to the lane, the output end of the high-frequency laser ranging module is connected to the input end of the vehicle contour drawing module, and the output end of the vehicle contour drawing module is connected to the The input terminal of the vehicle type identification module.

In the vehicle type automatic identification system based on high-speed pulsed laser scanning, the laser scanning frequency of the high-frequency laser ranging module is 2000 Hz, and the laser wavelength is 904 nm.

In the vehicle type automatic identification system based on high-speed pulsed laser scanning, the high-frequency laser rangefinder module and the vehicle contour drawing module are integrated in a high-frequency laser rangefinder, and the high-frequency laser rangefinder is fixed on On the road monitoring frame above the middle of the lane.

In the vehicle type automatic identification system based on high-speed pulsed laser scanning, the range of the high-frequency laser ranging module is 30 meters.

In the vehicle type automatic identification system based on high-speed pulsed laser scanning, the vehicle contour drawing module is a distance parameter scanning map drawing unit, and the input end of the distance parameter scanning map drawing unit is connected to the high-frequency laser ranging module. The output end, the output end of the distance parameter scanning map drawing unit is connected to the vehicle type identification module.

In the vehicle type automatic identification system based on high-speed pulsed laser scanning, the distance parameter scanning map drawing unit is connected to the vehicle type identification module through a wireless signal.

In the vehicle type automatic identification system based on high-speed pulsed laser scanning, the vehicle type identification module includes a preprocessing unit, an image matching unit and a vehicle type library unit, and the input end of the preprocessing unit is connected to the vehicle outline drawing module. output terminal, the output terminal of the preprocessing unit is respectively connected to the input terminal of the image matching unit and the model library unit, the output terminal of the vehicle model library unit is connected to the output terminal of the image matching unit, and the The output end of the image matching unit is a vehicle type information output end, and the vehicle type information output end is a network interface or a serial interface.

In the vehicle type automatic identification system based on high-speed pulsed laser scanning, the preprocessing unit includes a vehicle length identification subunit, a vehicle height identification subunit, and a vehicle outline extraction subunit, and the vehicle length identification subunit and vehicle height The output ends of the identification subunits are all connected to the vehicle model library unit, and the vehicle outline extraction subunit is connected to the image matching unit.

The present invention also provides a method for using the system to realize automatic vehicle identification based on high-speed pulsed laser scanning, the method comprising the following steps:

(1) The high-frequency laser ranging module performs real-time pulse laser ranging, and sends the measured distance value to the vehicle contour drawing module;

(2) The vehicle contour drawing module draws the received distance value on the distance parameter scanning map in real time;

(3) The vehicle contour drawing module sends the distance parameter scan map to the vehicle type identification module in real time;

(4) The vehicle type identification module identifies the vehicle type according to the vehicle outline information drawn on the distance parameter scan map, and outputs the vehicle type data information.

In the method for realizing automatic identification of vehicle models based on high-speed pulsed laser scanning, the vehicle contour drawing module is a distance parameter scanning map drawing unit, and the input end of the distance parameter scanning map drawing unit is connected to the high-frequency laser ranging The output end of the module, the output end of the described distance parameter scanning map drawing unit is connected to the described vehicle type identification module, and the described vehicle outline drawing module will receive the distance value and draw it on the distance parameter scanning map in real time, specifically: the The distance parameter scanning map drawing unit draws the received distance value in a coordinate system in real time to form a distance parameter scanning map.

In the method for realizing automatic identification of vehicle types based on high-speed pulsed laser scanning, the distance parameter scanning map drawing unit is connected to the vehicle type identification module through wireless signals, and the vehicle profile drawing module draws the distance parameter scanning map Sending to the vehicle type identification module in real time, specifically: the vehicle outline drawing module sends the distance parameter scan map to the vehicle type identification module in real time through wireless signals.

In the method for realizing the automatic identification of vehicle models based on high-speed pulsed laser scanning, the vehicle vehicle identification module includes a preprocessing unit, an image matching unit and a vehicle vehicle library unit, and the input terminal of the preprocessing unit is connected to the vehicle outline drawing The output end of the module, the output end of the preprocessing unit is respectively connected to the input end of the image matching unit and the car model library unit, the output end of the car model library unit is connected to the output end of the image matching unit, The output end of the image matching unit is the vehicle type information output end, and the step (4) specifically includes the following steps:

(41) The preprocessing unit obtains vehicle model parameter information and vehicle model profile information according to the distance parameter scan map;

(42) The preprocessing unit sends the car model parameter information to the car model library unit, and sends the car model profile information to the image matching unit;

(43) The car model library unit reads the image information of multiple car models corresponding to the obtained car model parameter information and sends them to the image matching unit;

(44) The image matching unit sequentially compares the car model profile information obtained from the preprocessing unit with the image information of each car model obtained from the car model library unit, and compares the car model information of the closest image information as a matching model;

(45) The vehicle type information output terminal outputs the data information of the matching vehicle type.

In the method for realizing the automatic identification of vehicle models based on high-speed pulsed laser scanning, the preprocessing unit includes a vehicle length identification subunit, a vehicle height identification subunit and a vehicle outline extraction subunit, and the vehicle length identification subunit and The output ends of the vehicle height identification subunit are connected to the vehicle model library unit, the vehicle contour extraction subunit is connected to the image matching unit, and the preprocessing unit obtains the vehicle model according to the distance parameter scan image Parameter information and vehicle profile information, specifically: the vehicle length identification subunit obtains vehicle length information according to the distance parameter scanning diagram; the vehicle height identification subunit obtains vehicle height according to the distance parameter scanning diagram Information; the vehicle contour line extraction subunit obtains vehicle contour information according to the distance parameter scan map.

In the method for realizing automatic identification of car models based on high-speed pulsed laser scanning, the preprocessing unit sends the car model parameter information to the car model library unit, specifically: the preprocessing unit sends the The vehicle length information and vehicle height information are sent to the vehicle model library unit.

In the method for realizing automatic identification of car models based on high-speed pulsed laser scanning, the car model library unit reads the image information of a plurality of car models corresponding to the obtained car model parameter information and sends them to the image matching unit, specifically: car models The library unit reads the corresponding image information of a plurality of vehicle models with matching vehicle lengths and vehicle heights according to the obtained vehicle length information and vehicle height information and sends them to the image matching unit.

In the method for realizing the automatic vehicle identification based on high-speed pulsed laser scanning, the step (44) specifically includes the following steps:

(44-1) The image matching unit uses an approximate measurement method to compare the profile information of the car model with the image information of each car model in order to obtain the degree of approximation of each car model;

The image matching unit described in (44-1) uses the car model corresponding to the image information with the highest degree of approximation as the matching car model.

The vehicle automatic identification system based on high-speed pulsed laser scanning of the invention is adopted, which includes a high-frequency laser ranging module, a vehicle outline drawing module and a vehicle identification module, and the high-frequency laser ranging module and the vehicle outline drawing module are arranged in Above the lane that the vehicle passes by, the laser pulse emission port of the high-frequency laser ranging module is perpendicular to the lane, and the output end of the high-frequency laser ranging module is connected to the input end of the vehicle contour drawing module , the output end of the vehicle outline drawing module is connected to the input end of the vehicle type identification module. When the vehicle passes by, the high-frequency laser ranging module performs real-time pulse laser ranging, and sends the measured distance value to the vehicle contour drawing module; the vehicle contour drawing module draws the received distance value in real time in the distance parameter scanning on the map, and send the distance parameter scan map to the vehicle type identification module in real time; the vehicle type identification module realizes vehicle type identification according to the vehicle profile information drawn on the distance parameter scan map. Thereby, the defects of high equipment setting and maintenance cost and low vehicle identification rate existing in the prior art are effectively overcome, and a vehicle automatic identification system with simple setting and maintenance and low cost is provided, and the vehicle identification rate of the system is relatively low. High, the application range is also very wide.

Description of drawings

Fig. 1 is a structural schematic diagram of the vehicle type automatic identification system based on high-speed pulsed laser scanning of the present invention.

FIG. 2 is a flow chart of the steps of the method for realizing the automatic vehicle identification based on high-speed pulsed laser scanning of the present invention.

Fig. 3 is a functional block diagram of the laser rangefinder used in the practical application of the present invention.

Fig. 4 is a schematic diagram of the erection position of the laser range finder in the practical application of the present invention.

Fig. 5 is a schematic diagram of contour scanning data drawing in practical application of the present invention.

Fig. 6 is a schematic diagram of the vehicle type identification process in practical application of the present invention.

Detailed ways

In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

Please refer to FIG. 1 , which is a schematic structural diagram of the vehicle type automatic identification system based on high-speed pulsed laser scanning of the present invention.

In one embodiment, the system includes a high-frequency laser ranging module, a vehicle contour drawing module, and a vehicle type identification module. The high-frequency laser ranging module and the vehicle contour drawing module are arranged above the lane that the vehicle passes through. The laser pulse emission port of the high-frequency laser ranging module is perpendicular to the lane, the output end of the high-frequency laser ranging module is connected to the input end of the vehicle contour drawing module, and the vehicle contour drawing module The output terminal is connected to the input terminal of the vehicle type identification module.

Using the system described in this embodiment to realize the method for automatic vehicle identification based on high-speed pulsed laser scanning, as shown in Figure 2, includes the following steps:

(1) The high-frequency laser ranging module performs real-time pulse laser ranging, and sends the measured distance value to the vehicle contour drawing module;

(2) The vehicle contour drawing module draws the received distance value on the distance parameter scanning map in real time;

(3) The vehicle contour drawing module sends the distance parameter scan map to the vehicle type identification module in real time;

(4) The vehicle type identification module identifies the vehicle type according to the vehicle outline information drawn on the distance parameter scan map, and outputs the vehicle type data information.

In a more preferred embodiment, the high-frequency laser rangefinder module and the vehicle contour drawing module are integrated into a high-frequency laser rangefinder, and the high-frequency laser rangefinder is fixed in the middle of the lane On the road monitoring frame above, its installation method is very simple. The laser scanning frequency of the high-frequency laser ranging module can be 2000Hz, and the laser wavelength is 904nm. The range of the high-frequency laser ranging module is 30 meters.

In another preferred embodiment, the vehicle contour drawing module is a distance parameter scanning map drawing unit, and the input end of the distance parameter scanning map drawing unit is connected to the output end of the high-frequency laser ranging module , the output end of the distance parameter scanning map drawing unit is connected to the vehicle type identification module. The output end of the distance parameter scanning map drawing unit can be connected to the vehicle type identification module through a data line or a wireless signal.

In the method of using the system described in this preferred embodiment to realize the automatic identification of vehicle models based on high-speed pulsed laser scanning, the step (2) the vehicle contour drawing module draws the received distance value on the distance parameter scanning map in real time , specifically: the distance parameter scanning map drawing unit draws the received distance value in a coordinate system in real time to form a distance parameter scanning map. And the step (3) the vehicle contour drawing module sends the distance parameter scanning diagram to the vehicle type identification module in real time, specifically: the vehicle contour drawing module transmits the distance parameter scanning diagram through the data line or The wireless signal is sent to the vehicle identification module in real time.

In a further preferred embodiment, the vehicle type identification module includes a preprocessing unit, an image matching unit, and a vehicle type library unit, the input end of the preprocessing unit is connected to the output end of the vehicle outline drawing module, The output of the preprocessing unit is respectively connected to the input of the image matching unit and the car model library unit, the output of the car model library unit is connected to the output of the image matching unit, and the image matching The output end of the unit is the vehicle type information output end, and the vehicle type information output end is a network interface or a serial interface.

In the method of using the system described in this further preferred embodiment to realize the automatic vehicle identification method based on high-speed pulsed laser scanning, the step (4) specifically includes the following steps:

(41) The preprocessing unit obtains vehicle model parameter information and vehicle model profile information according to the distance parameter scan map;

(42) The preprocessing unit sends the car model parameter information to the car model library unit, and sends the car model profile information to the image matching unit;

(43) The car model library unit reads the image information of multiple car models corresponding to the obtained car model parameter information and sends them to the image matching unit;

(44) The image matching unit sequentially compares the car model profile information obtained from the preprocessing unit with the image information of each car model obtained from the car model library unit, and compares the car model information of the closest image information as a matching model;

(45) The vehicle type information output terminal outputs the data information of the matching vehicle type.

In a more preferred embodiment, the preprocessing unit includes a vehicle length identification subunit, a vehicle height identification subunit, and a vehicle outline extraction subunit, and the vehicle length identification subunit and vehicle height identification subunit The output ends of each are connected to the car model library unit, and the vehicle outline extraction subunit is connected to the image matching unit.

In the method of using the system described in this more preferred embodiment to realize the automatic recognition of car models based on high-speed pulsed laser scanning, the step (41) preprocessing unit obtains car model parameter information and car model information based on the distance parameter scan map. Outline information, specifically: the vehicle length identification subunit obtains vehicle length information according to the distance parameter scanning diagram; the vehicle height identification subunit obtains vehicle height information according to the distance parameter scanning diagram; The vehicle contour line extraction subunit obtains vehicle contour information according to the distance parameter scan map. The pre-processing unit in step (42) sends the car model parameter information to the car model library unit, specifically: the pre-processing unit sends the car length information and car height information to the car model library unit. The model library unit described above. And in the step (43), the car model library unit reads the image information of the corresponding multiple car models according to the obtained car model parameter information and sends them to the image matching unit, specifically: the car model library unit reads the image information of the corresponding car models according to the obtained model car length information and The vehicle height information reads corresponding image information of a plurality of vehicle models with matching vehicle lengths and vehicle heights and sends them to the image matching unit.

In another more preferred embodiment, the step (44) specifically includes the following steps:

(44-1) The image matching unit uses an approximate measurement method to compare the profile information of the car model with the image information of each car model in order to obtain the degree of approximation of each car model;

The image matching unit described in (44-1) uses the car model corresponding to the image information with the highest degree of approximation as the matching car model.

In practical application, the vehicle type automatic identification system based on high-speed pulsed laser scanning of the present invention has the following characteristics: (a) using a high-frequency laser rangefinder as a detector; (b) the scanning frequency of the laser rangefinder used is as high as 2000Hz , the laser emission wavelength is 904nm, and the safety of human eyes complies with GB7247.1-2001I; (c) The range finder is arranged on the existing road monitoring frame and scans vertically downward; (d) The vehicle model is depicted on the laser range finder (e) The system has two transmission interfaces: network and serial port; (f) The vehicle identification algorithm is based on the principle of image pattern recognition, and the sample data and the data in the vehicle database are compared and judged by the computer Models can be generated, so as to realize the automatic classification of models.

Laser scanning technology is a technology that uses laser to measure the distance of the target object (also known as laser ranging). When it works, it shoots a laser beam to the target, and the photoelectric element receives the laser beam reflected by the target. The timer measures the time from the launch to the reception of the laser beam, and calculates the distance from the observer to the target. The principle and structure of LiDAR (Light Laser Detection and Ranging, laser detection and ranging system) are very similar to the laser range finder. The system consists of a single beam narrowband laser and a receiver system. A laser generates and emits a pulse of light that hits an object and bounces back, where it is picked up by a receiver. The receiver accurately measures the travel time of the light pulse from when it is emitted to when it is reflected back. Given that the speed of light is known, travel time can be converted into a measure of distance. The principle block diagram of the laser range finder used in the present invention is shown in FIG. 3 .

The laser scanning method uses the laser ranging instrument arranged on the road monitoring frame as a detector. When the vehicle passes by the device, according to the ranging scanning of different parts of the vehicle, the side geometric data of the vehicle is collected, and then the data is compared with the vehicle model database. The model is judged after comparing the data, so as to realize the automatic classification of the model. In the vehicle identification system based on laser high-speed pulse scanning technology, the frequency of the laser distance measuring instrument is very high, which ensures that the system can collect enough data, including the height of the front of the vehicle, the length of the vehicle, the number of axles, the wheelbase, etc. Feature data, these information can describe the outer contour and local typical features of the vehicle in a relatively complete and detailed manner, so that the system can achieve a high recognition rate. The advantage of this method is that the recognition rate is high. In addition, the hardware installation is very simple. It only needs to install a laser range finder on the existing camera monitoring bracket, and connect it to the host computer with a data transmission line. Moreover, the method does not need to destroy the road surface, and the maintenance is very convenient.

The contour recognition system adopts laser emission and reception vertically downward, as shown in Figure 4 below, aiming at the middle position of a lane. When there is a vehicle passing by, the laser rangefinder can output the change of the measured distance value in real time. Then draw the outline of the car under test. This measurement method generally uses a small laser beam divergence angle, and the ranging range is generally less than 30 meters, and requires a relatively high laser ranging rate, which generally requires several kilohertz. This can achieve very good results for monitoring important road sections, and can distinguish various models, and the sampling rate for body scanning can reach a point of 1 cm. It can also be used in traffic flow monitoring, vehicle height limit and other applications.

The method for realizing the automatic vehicle identification based on high-speed pulsed laser scanning of the present invention adopts the approximate measurement method. Firstly, the data of laser scanning is intercepted to draw relevant vehicle models, as shown in Figure 5. Then make corrections. The main content of correction includes contour angle and contour burr, and then it is identified through relevant pattern matching algorithm. The recognition process is to find a picture of a similar car model corresponding to the model map.

Generally speaking, due to the different imaging conditions obtained by images at different times, different sensors, and different viewing angles, even for the same object, the geometric characteristics, optical characteristics, and spatial positions shown in the image will be very different. If it is considered that noise, interference and other effects will cause great differences in images, image matching is to find their similarities through these differences. This method utilizes the physical shape features (points, lines) of the image, such as edges, skeleton lines, corners, etc., and the number of pixels that need to be calculated has been significantly reduced, and it has stronger adaptability. This algorithm is less sensitive to some subtle disturbances, but relies on the extracted image features. The key is to find features that are easy to identify and distinguish, and find the matching position of the template in the image based on the similarity measure between feature sets. Therefore, the identification process adopted by the present invention is shown in FIG. 6 .

The vehicle automatic identification system based on high-speed pulsed laser scanning of the invention is adopted, which includes a high-frequency laser ranging module, a vehicle outline drawing module and a vehicle identification module, and the high-frequency laser ranging module and the vehicle outline drawing module are arranged in Above the lane that the vehicle passes by, the laser pulse emission port of the high-frequency laser ranging module is perpendicular to the lane, and the output end of the high-frequency laser ranging module is connected to the input end of the vehicle contour drawing module , the output end of the vehicle outline drawing module is connected to the input end of the vehicle type identification module. When the vehicle passes by, the high-frequency laser ranging module performs real-time pulse laser ranging, and sends the measured distance value to the vehicle contour drawing module; the vehicle contour drawing module draws the received distance value in real time in the distance parameter scanning on the map, and send the distance parameter scan map to the vehicle type identification module in real time; the vehicle type identification module realizes vehicle type identification according to the vehicle profile information drawn on the distance parameter scan map. Thereby, the defects of high equipment setting and maintenance cost and low vehicle identification rate existing in the prior art are effectively overcome, and a vehicle automatic identification system with simple setting and maintenance and low cost is provided, and the vehicle identification rate of the system is relatively low. High, the application range is also very wide.

In this specification, the invention has been described with reference to specific embodiments thereof. However, it is obvious that various modifications and changes can be made without departing from the spirit and scope of the invention. Accordingly, the specification and drawings are to be regarded as illustrative rather than restrictive.

Claims (14)

1. the automatic Vehicle Recognition System based on high-speed pulse laser scanning, it is characterized in that, described system comprises high frequency lasers range finder module, vehicle ' s contour drafting module and vehicle identification module, described high frequency lasers range finder module and vehicle ' s contour drafting module are arranged at the top, track of vehicle process, the laser pulse emission port of described high frequency lasers range finder module is perpendicular to described track, the output terminal of described high frequency lasers range finder module connects the input end of described vehicle ' s contour drafting module, the output terminal of described vehicle ' s contour drafting module connects the input end of described vehicle identification module,

Described vehicle identification module comprises pretreatment unit, images match unit and vehicle library unit, the input end of described pretreatment unit connects the output terminal of described vehicle ' s contour drafting module, the output terminal of described pretreatment unit connects respectively described images match unit and the input end of vehicle library unit, the output terminal of described vehicle library unit connects the output terminal of described images match unit, the output terminal of described images match unit is vehicle information output, and this vehicle information output is network interface or serial line interface;

Described pretreatment unit comprises vehicle commander's recognin unit, overall height recognin unit and vehicle ' s contour line drawing subelement, described vehicle commander's recognin unit is all connected described vehicle library unit with the output terminal of overall height recognin unit, and described vehicle ' s contour line drawing subelement connects described images match unit.

2. the automatic Vehicle Recognition System based on high-speed pulse laser scanning according to claim 1, is characterized in that, the laser scanning frequency of described high frequency lasers range finder module is 2000Hz, and optical maser wavelength is 904nm.

3. the automatic Vehicle Recognition System based on high-speed pulse laser scanning according to claim 1, it is characterized in that, described high frequency lasers range finder module and vehicle ' s contour drafting module are all integrated in one, and described high frequency lasers stadimeter is fixed on the road monitoring frame of described track middle upper part.

4. the automatic Vehicle Recognition System based on high-speed pulse laser scanning according to claim 1, is characterized in that, the finding range of described high frequency lasers range finder module is 30 meters.

5. the automatic Vehicle Recognition System based on high-speed pulse laser scanning according to claim 1, it is characterized in that, described vehicle ' s contour drafting module is a distance parameter scintigram drawing unit, the input end of this distance parameter scintigram drawing unit connects the output terminal of described high frequency lasers range finder module, and the output terminal of described distance parameter scintigram drawing unit connects described vehicle identification module.

6. the automatic Vehicle Recognition System based on high-speed pulse laser scanning according to claim 5, is characterized in that, described distance parameter scintigram drawing unit connects described vehicle identification module by wireless signal.

7. the vehicle of utilizing the system described in claim 1 to realize based on high-speed pulse laser scanning is known a method for distinguishing automatically, it is characterized in that, described method comprises the following steps:

(1) described high frequency lasers range finder module carries out real-time pulse laser ranging, and the distance value recording is sent to described vehicle ' s contour drafting module;

(2) described vehicle ' s contour drafting module will receive distance value real-time rendering on distance parameter scintigram;

(3) described distance parameter scintigram is sent in real time described vehicle identification module by described vehicle ' s contour drafting module;

(4) described vehicle identification module is identified vehicle according to the vehicle ' s contour information of drawing on described distance parameter scintigram, and exports model data information.

8. the vehicle of realization according to claim 7 based on high-speed pulse laser scanning known method for distinguishing automatically, it is characterized in that, described vehicle ' s contour drafting module is a distance parameter scintigram drawing unit, the input end of this distance parameter scintigram drawing unit connects the output terminal of described high frequency lasers range finder module, the output terminal of described distance parameter scintigram drawing unit connects described vehicle identification module, described vehicle ' s contour drafting module will receive distance value real-time rendering on distance parameter scintigram, be specially:

Described distance parameter scintigram drawing unit will receive distance value real-time rendering in a coordinate system, form a distance parameter scintigram.

9. the vehicle of realization according to claim 7 based on high-speed pulse laser scanning known method for distinguishing automatically, it is characterized in that, described distance parameter scintigram drawing unit connects described vehicle identification module by wireless signal, described distance parameter scintigram is sent in real time described vehicle identification module by described vehicle ' s contour drafting module, is specially:

Vehicle ' s contour drafting module is sent to described vehicle identification module by described distance parameter scintigram in real time by wireless signal.

10. according to the realization described in any one in claim 7 to 9, the vehicle based on high-speed pulse laser scanning is known method for distinguishing automatically, it is characterized in that, described vehicle identification module comprises pretreatment unit, images match unit and vehicle library unit, the input end of described pretreatment unit connects the output terminal of described vehicle ' s contour drafting module, the output terminal of described pretreatment unit connects respectively described images match unit and the input end of vehicle library unit, the output terminal of described vehicle library unit connects the output terminal of described images match unit, the output terminal of described images match unit is vehicle information output, described step (4) specifically comprises the following steps:

(41) described pretreatment unit obtains vehicle parameter information and vehicle profile information according to described distance parameter scintigram;

(42) described vehicle parameter information is sent to described vehicle library unit by described pretreatment unit, and described vehicle profile information is sent to described images match unit;

(43) image information that described vehicle library unit reads corresponding multiple vehicles according to the vehicle parameter information obtaining is sent to described images match unit;

(44) described images match unit contrasts the vehicle profile information obtaining from described pretreatment unit and the image information of each vehicle obtaining from described vehicle library unit successively, and using the vehicle of immediate image information as coupling vehicle;

(45) data message of the coupling vehicle described in described vehicle information output output.

The vehicle of 11. realizations according to claim 10 based on high-speed pulse laser scanning known method for distinguishing automatically, it is characterized in that, described pretreatment unit comprises vehicle commander's recognin unit, overall height recognin unit and vehicle ' s contour line drawing subelement, described vehicle commander's recognin unit is all connected described vehicle library unit with the output terminal of overall height recognin unit, described vehicle ' s contour line drawing subelement connects described images match unit, described pretreatment unit obtains vehicle parameter information and vehicle profile information according to described distance parameter scintigram, be specially:

Described vehicle commander's recognin unit obtains vehicle commander's information according to described distance parameter scintigram; Described overall height recognin unit obtains overall height information according to described distance parameter scintigram; Described vehicle ' s contour line drawing subelement obtains vehicle ' s contour information according to described distance parameter scintigram.

The vehicle of 12. realizations according to claim 11 based on high-speed pulse laser scanning known method for distinguishing automatically, it is characterized in that, described vehicle parameter information is sent to described vehicle library unit by described pretreatment unit, is specially:

Described vehicle commander's information and overall height information are sent to described vehicle library unit by described pretreatment unit.

The vehicle of 13. realizations according to claim 12 based on high-speed pulse laser scanning known method for distinguishing automatically, it is characterized in that, the image information that described vehicle library unit reads corresponding multiple vehicles according to the vehicle parameter information obtaining is sent to described images match unit, is specially:

According to the vehicle vehicle commander's information obtaining, and overall height information reads multiple vehicle commanders of correspondence to vehicle library unit and the image information of the vehicle that overall height conforms to is sent to described images match unit.

The vehicle of 14. realizations according to claim 10 based on high-speed pulse laser scanning known method for distinguishing automatically, it is characterized in that, described step (44) specifically comprises the following steps:

(44-1) described images match unit by using approximate measure method contrasts described vehicle profile information successively with the image information of described each vehicle, obtains the degree of approximation of each vehicle;

(44-1) described images match unit is using vehicle corresponding the image information the highest degree of approximation as coupling vehicle.

Images