KR20010002941A - Device and method for filtering vehicle position of position processing system - Google Patents

Abstract

PURPOSE: An apparatus and method for sorting the position information of mobile objects in a position information processing system is provided to reduce the amount of the position information of mobile objects and to swiftly generate and transmit necessary information for drivers by extracting position information essential for the automatic trace of a mobile object's position. CONSTITUTION: It is checked whether the position information of a mobile object inputted from a position information input part is an initial position(S01,S02). If it is discriminated that it is the initial position, the mobile object is registered by setting up the initial information of each condition decision part using the initial position(S03) and by storing the data(S08).

Description

Device and method for filtering vehicle position information in position information processing system {Device and method for filtering vehicle position of position processing system}

The present invention relates to a moving object location information sorting apparatus for selectively storing the location information of the moving object using the GPS signal, in particular, the moving object location to reduce the number of stored and managed location information and to maintain only the latest valid location information An information sorting device and method.

In this specification, the term "positional information" means information including a position on the ground of the moving object and a time at this position unless otherwise stated.

The automatic tracking of the vehicle position is equipped with a GPS receiver and automatically tracks the position of the vehicle, such as a moving vehicle, by using GPS satellite signals. It is a necessary way. The mobile location tracking system is divided into three components, namely, a mobile device equipped with a GPS receiver, a wireless communication network that transmits the location information received by the mobile device to the central control center, and stores and processes the location information of the transmitted mobile device. It consists of a central control center for analysis.

Typical applications are AVL (Automated Vehicle Locator) system, truck transportation system, parcel delivery service system, taxi call service system, aircraft location tracking system.

However, the GPS that can be used by civilians has an error of about 100m in the horizontal plane, and such accuracy cannot satisfy the error within 10m that is generally required for vehicle navigation. Therefore, DGPS (Differential GPS) and IGPS (Inverted GPS) techniques are used to obtain more accurate position accuracy. However, in the DGPS technique, the intrinsic error factors of the GPS signal, that is, the error of the GPS satellite itself, the communication delay error, the error due to the ionosphere, the error due to the troposphere, the local constraints on the radio wave reception, and the delay due to the multipath, are introduced. In IGPS, the positional accuracy decreases due to the reduction of the correction effect due to the increase of the base length.

In the conventional method for tracking the position of a moving object, the main attention is paid to correcting the error of the received GPS signal to obtain accurate position information, and the position information transmitted by the moving object equipped with the GPS receiver to the central control center undergoes only the position correction process. By storing them in an expensive large-capacity database located in the control center without any separate screening process, it has become a major factor that slows down the time to generate new information needed by the driver of the moving object by reducing the efficiency of database use and analyzing the stored location information. .

The present invention is to solve the above problems, in the position information processing system for processing the position information of the moving object is extracted by extracting only the position information necessary for the automatic tracking of the position of the moving object to reduce the number of position information of the mobile body to be stored It is an object of the present invention to provide a location information sorting apparatus and method for a location information processing system that can quickly generate and deliver information required by a driver.

1 is a block diagram illustrating a configuration of a location information processing system to which a moving object location information sorting apparatus according to the present invention is applied;

2 is a block diagram for explaining a configuration of a moving object position information sorting apparatus of a position information processing system according to an embodiment of the present invention;

FIG. 3 is a view showing an angle of change in a driving direction of a moving object determined by the driving direction conditioner of the positional information sorting apparatus shown in FIG. 2;

4 is a flowchart illustrating a method of selecting location information according to an embodiment of the present invention.

※ Explanation of code about main part of drawing ※

100: location information input unit 200: location information selection unit

300: internal memory 400: location information storage

500: location information display unit

According to the present invention for achieving the above object, there is provided an apparatus for selecting the position information of a mobile body obtained from a GPS receiver and a wireless communication network and a database and a file mounted on the mobile body.

The moving object position information sorting device determines a mileage condition determination unit for determining whether the moving object mileage condition is satisfied with respect to the input moving body position information, and fulfills a condition regarding the traveling time of the moving object with respect to the input moving body position information. A moving object selected by combining the driving time condition determining unit for determining whether to judge whether or not, the driving direction condition determining unit for determining whether or not the condition regarding the moving direction of the moving object is satisfied with the input moving object position information, and the determination result of each condition determining unit It includes an internal memory for storing location information.

Preferably, the distance condition in the driving distance condition determining unit is whether or not the distance between the current position and the immediately preceding position is equal to or greater than the reference distance, and the time condition in the driving time condition determining unit is the time immediately preceding the current position. Is a difference of time at or more than a reference time, and the direction condition at the driving direction condition determination unit is whether or not the difference between the direction of travel at the current position and the direction of travel at the immediately preceding position is greater than or equal to the reference angle. The selection condition for the location information is determined by whether the location information satisfies the time condition and the distance condition at the same time or the direction condition.

In addition, according to the present invention there is provided a method for selecting the position information of a mobile body obtained from a GPS receiver, a wireless communication network, a database, and a file mounted on the mobile body. The moving object position information selection method includes a checking step of checking whether the moving object position information input from the position information input unit is an initial position, and a registering step of setting and storing the position information of the moving object determined as the initial position in the checking step as initial information. And a determining step of determining the validity of the position information determined as not the initial position in the checking step, and a storing step of selecting and storing only the position information determined to be valid in the determining step.

In the determining step, the validity can be determined by combining the driving distance condition determination value and the driving time condition determination value and the driving direction condition determination value for the corresponding position information, and the combination is performed as expressed by the following equation. Good.

Selection condition = ((distance condition && time condition) ∥direction condition)

The moving object location information selection method may further include a deletion step of deleting the location information stored in the storage step after all of the reserved external devices have accessed at least once, wherein the stored data is set in the deletion step. If the capacity is exceeded, the oldest data can be deleted.

On the other hand, according to the present invention, there is provided a recording medium having stored thereon a program for operating the above-mentioned moving object position information sorting apparatus according to the above-mentioned moving object position information sorting method.

These and other features and advantages of this invention will become more apparent from the following description of the preferred embodiments.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the position information sorting apparatus and method of the position information processing system according to the present invention.

FIG. 1 is a block diagram of a location information processing system, FIG. 2 is a block diagram of a location information selection unit of the location information processing system shown in FIG. 1, and FIG. 3 is a diagram illustrating a driving angle between moving objects in a driving direction conditioner. 4 is an exemplary view, and FIG. 4 is a flowchart of a moving object position information selection method using the position information processing system according to the present invention.

Referring to FIG. 1, the moving object location processing system includes a location information input unit 100, a location information selection unit 200 and 300, a location information storage unit 400, and a location information display unit 500. The location information input unit 100 obtains location information of a moving object by a method of obtaining location information from a GPS satellite, a method of obtaining location information from a wireless communication network, or a method of obtaining location information stored in a database or a file. As shown in FIG. 2, the location information selection unit 200 aggregates the results of the travel time conditioner 220, the results of the travel distance conditioner 230, and the results of the travel direction conditioner 240. It determines whether to select or drop the input position information of the moving object and outputs the selected position information (250).

The location information storage unit 400 stores the location information of the moving object selected by the location information selecting unit 200 in a database or a file, and the location information display unit 500 stores the location of the moving object selected by the location information selecting unit 200. It is responsible for displaying on the screen to show the information to the user. In addition, the location information selector 200, the location information storage unit 400, and the location information display unit 500 independently and simultaneously perform their roles. That is, instead of the other devices not operating when one device is in operation, the three devices operate at the same time, thereby shortening the processing time of the information on the moving object position selection.

The driving time conditioner 220 shown in FIG. 2 outputs a true value if the difference between the traveling time at the current position P2 and the immediately preceding position P1 of the moving object is equal to or greater than the reference time, and false otherwise. false) Print the value. In this embodiment, the reference time is set to 5 seconds. The set reference time sets the interval of receiving time for receiving the location signal from the GPS or the wireless communication network, and serves as a selection criterion of the stored location information when processing the location information stored in the database or the file. In FIG. 2, the driving distance conditioner 230 outputs a true value if the difference between the current distance P2 of the moving object at the current position P2 and the previous position P1 is greater than or equal to the reference distance, and false otherwise. false) Print the value. In this embodiment, the reference distance is set to 100 m. The travel time condition determination unit 220 and the travel distance condition determination unit 230 select and drop location information when the moving object is traveling at a low speed or stopped by a traffic light or an accident. Here, by analyzing the location information dropped out, it is possible to grasp the driving state of the road, such as communication smoothness, slow motion, heavy traffic.

In addition, the driving direction conditioner 240 of FIG. 2 outputs a true value when the difference between the driving direction at the current position P2 and the immediately preceding position P1 of the moving object is greater than or equal to the reference angle, and false otherwise. false) Print the value. The moving direction of the moving object is represented by θ as shown in FIG. 3, and the difference in the moving direction of the current position P2 with respect to the traveling direction at the immediately preceding position P1 is calculated and compared with the reference angle. In this embodiment, the reference angle is set to 30 degrees. In the driving direction conditioner 240, the travel time conditioner 220 and the travel distance conditioner 230 are responsible for selecting useful information from the dropped information. In other words, if you turn left or right at the intersection, you will be dropped at the time of determining the mileage condition by driving at low speed. However, since the position information of the rotating moving object becomes important information for tracking the moving object, select this position information again in the driving direction condition determination. .

4 is a flowchart of a method for screening moving object position information according to the present invention. Referring to FIG. 4, the moving object position information selection method first checks whether the moving object position information inputted from the position information input unit 100 (S01) is an initial position, and determines that the initial position is an initial position. The moving object is registered by setting initial information of the conditional decision units 220, 230, and 240 (S03) and storing (S08).

If it is determined that the initial position is not in the inspection step (S02), the inputted position information is simultaneously provided to the driving time condition determining unit 220, the driving distance condition determining unit 230, and the driving direction condition determining unit 240 ( S04, S05, and S06) are compared with the positional information immediately before the moving object, and the judgment is made according to each criterion.

In the step (S07) of determining the validity of the position information, it is determined whether to select or drop by combining the output results of each condition determination unit (220, 230, 240). The determination at this time is performed using the following equation (1).

Selection condition = ((distance condition && time condition) ∥direction condition)

When classified as dropped information, the corresponding information is discarded, and the entire process described above is repeated with respect to the new mobile position information inputted from the position information input unit 100 (S01).

When it is classified as a selection, it is selected as the location information and stored in the internal memory 300 of the location information selection unit 200, and the processing for the location information is completed, and inputted from the location information input unit 100 (S01). The entire process described above is repeated for the new moving object position information.

In addition, the position information selected by the position information (S07) and stored in the internal memory 300 of the position information selection unit 200 is read from the position information storage unit 400 and stored in an external database or file, and the driving trajectory of the moving object is subsequently added. It is used as data in the processing of information or in the analysis process to respond appropriately to the operator's requirements. In addition, the location information display unit 500 acquires the location information stored in the internal memory 300 of the location information selection unit 200 and displays the location information on the screen (S10) to inform the user of the location of the moving object.

The location information stored in the internal memory 300 of the location information selector 200 may be stored in the internal memory 300 based on the number and priority of the location information connection between the location information storage unit 400 and the location information display unit 500. It is deleted. The priority of the location information access is high in the location information storage unit 400. Since the speed of storing in the database or file is slower than the speed displayed on the screen, the connection priority of the location information storage unit 400 is higher than the connection priority of the location information display unit 500. Therefore, the location information stored in the internal memory 300 of the location information selection unit 200 is deleted only when the location information storage unit 400 and the location information display unit 500 are connected once, respectively, and the location information storage unit 400 is used. Even if any one of the location information display unit 500 reconnects the same location information, the location information is not deleted and is not displayed on the screen or stored in the external storage device. When the same positional information is reconnected, the connection is switched to the positional information stored after the positional information.

While the invention has been described above based on the preferred embodiments thereof, these embodiments are intended to illustrate rather than limit the invention. It will be apparent to those skilled in the art that various changes, modifications, or adjustments to the above embodiments can be made without departing from the spirit of the invention. Therefore, the protection scope of the present invention will be limited only by the appended claims, and should be construed as including all such changes, modifications or adjustments.

As can be seen above, the moving object location information sorting apparatus and method of the present invention reduces the number of stored location information by sorting and processing the location information of the moving object, thereby increasing the storage efficiency of the database and analyzing the stored location information. Can be reduced. In addition, by quickly generating and providing the information required by the driver of the moving object can improve the service of the vehicle tracking system or the vehicle management system, it is possible to reduce the time required for the movement of the emergency vehicle in an emergency situation. In addition, it is possible to reduce the amount of memory that stores the location information of the moving object. Therefore, the location information is stored in the low-cost small memory installed in each vehicle without using the expensive wireless communication network and the central control center. Since it can be checked, the hourly utilization efficiency of a mobile body can be improved, and it can apply to an AVL system, a truck driving management system, an emergency vehicle management system, etc. accordingly.

Claims (9)

In the device for sorting the position information of the moving object obtained from a GPS receiver, a wireless communication network, a database and files, etc. mounted on the moving object, A mileage condition determination unit for determining whether the condition regarding the mileage of the moving object is satisfied with the input moving object position information; A travel time condition determination unit for determining whether the conditions relating to the travel time of the moving object are satisfied with the input moving object position information; A driving direction condition determination unit for determining whether or not the condition regarding the traveling direction of the moving object is satisfied with the input moving object position information; And an internal memory for storing the selected moving object position information by combining the determination results of each condition decision unit. The method of claim 1, The distance condition in the driving distance condition determination unit is whether the distance between the current position and the immediately preceding position is equal to or greater than the reference distance, The time condition in the travel time condition determination unit is whether the difference between the time at the current position and the time at the immediately preceding position is equal to or greater than the reference time. The direction condition in the driving direction condition determination unit is whether the difference between the traveling direction at the current position and the traveling direction at the immediately preceding position is equal to or greater than the reference angle, The selection condition for each location information is whether or not the location information satisfies the time condition and the distance condition at the same time or the direction condition. The method of claim 2, The driving time condition determining unit outputs a true value if the difference between the traveling time at the current position and the immediately preceding position of the moving object is 5 seconds or more, and outputs a false value otherwise. The mileage condition determination unit outputs a true value if the difference between the current distance and the previous position of the moving object is more than 100m, otherwise outputs a false value, And the driving direction condition determining unit outputs a true value if the difference between the current position of the moving object and the driving direction at the immediately preceding position is 30 degrees or more, and outputs a false value. In the method for screening the position information of the moving object obtained from a GPS receiver, a wireless communication network, a database and a file, etc. mounted on the moving object, An inspection step of checking whether the moving object position information input from the position information input unit is an initial position; A registration step of setting and storing the position information of the moving object determined as the initial position in the inspection step as initial information; A determination step of determining the validity of the position information determined as not the initial position in the inspection step; And a storage step of selecting and storing only the location information determined to be valid in the determination step. The method of claim 4, wherein And determining the validity by combining the driving distance condition determination value, the driving time condition determination value, and the driving direction condition determination value for the corresponding position information. The method of claim 5, Combination in the determination step is a moving object position information selection method, characterized in that made as represented by the following equation. Selection condition = ((distance condition && time condition) ∥direction condition) The method of claim 4, wherein And a deletion step of deleting the location information stored in the storing step after all reserved external devices have accessed at least once. The method of claim 7, wherein In the deleting step, if the stored data exceeds the set capacity, the moving object location information screening method, characterized in that to delete in order. A recording medium having a program for operating a GPS receiver mounted on a mobile device, a device for selecting location information of a mobile device obtained from a wireless communication network, a database and a file, etc. The program, An inspection step of checking whether the moving object position information input from the position information input unit is an initial position; A registration step of setting and storing the position information of the moving object determined as the initial position in the inspection step as initial information; A determination step of determining the validity of the position information determined as not the initial position in the inspection step; And a storage step of selecting and storing only location information determined to be valid in the determination step.