KR101088747B1 - System of measuring the position using a error characteristic of gps and the method thereof - Google Patents

Abstract

PURPOSE: A system for precisely measuring a location using an error feature of a GPS and a method thereof are provided to precisely measure a location during measurement using a GPS receiving module. CONSTITUTION: An effective value selecting unit(210) selects values measured within a set error tolerance range as effective measurement values. An average calculating unit(220) calculates the average value of the selected values. A standard deviation calculating unit(230) calculates a standard deviation by the average value and the effective measurement values. When the standard deviation is larger than a value in which a standard deviation is set, a reliability verifying unit(240) lowers the standard deviation under a set value. A location value providing unit(270) receives a location value measured for a measured object using a device which is installed in a GPS receiving module. The location value providing unit provides an accurate location value for the measured object by referring to mapping information stored in a location mapping information database.

Description

System for measuring the position using a error characteristic of GPS and the method

The present invention relates to a position measuring system using GPS and a method thereof, and more particularly, to a precision position measuring system using the error characteristic of GPS for measuring a precise position with respect to a measurement target using the error characteristic of the GPS. It is about.

As the performance of smartphones recently released improves, users are increasingly moving from mobile phones to smartphones. A smart phone is an intelligent mobile phone that adds computer support to a mobile phone. It is faithful to the mobile phone function, but adds a personal digital assistant (PDA) function, Internet function, and video playback function. Etc. are provided to provide a more convenient interface. In addition, by supporting the wireless Internet function, it is connected to the Internet and a computer to perform functions as a terminal such as e-mail, web browsing, fax, banking, and games.

On the other hand, the smart phone is equipped with a GPS (Global Positioning System) receiving module to measure the location, and provides a variety of location-based services using the measured position information.

However, there is a problem that the GPS receiving module provided in a smartphone or the like currently used is difficult to guarantee accuracy. That is, the tolerance range of a general GPS receiver module is within 30m, which is not suitable for using a smartphone for precise position measurement.

In addition, if you want to use a precision measuring device for precise position measurement, there is a burden due to the expensive cost, and because it is not easy for the general public to learn how to use the device, and also need to carry a separate device for the position measurement The problem is that it is cumbersome. As such, it is not easy for the public to purchase and use the precision measuring device or to purchase and use the device for business purposes.

Therefore, there is a need for a method capable of precise measurement using a general GPS receiver module included in a smartphone.

SUMMARY OF THE INVENTION An object of the present invention is to provide a precise position measuring system and method using the error characteristics of the GPS that can measure precisely by using the GPS receiving module by quantifying the error measured by the GPS receiving module and correcting the measurement result. have.

In addition, an object of the present invention is to quantify the error measured by the GPS receiving module, and to verify the validity of the precise position measurement system and method using the error characteristics of the GPS that can make a precise measurement using the GPS receiving module In providing.

In order to achieve the above object, the precision position measurement system using the error characteristics of the GPS according to the present invention, by receiving the position measurement values for the fixed object repeatedly measured a plurality of times using a device equipped with a GPS receiving module A valid value selector which selects measured values within a set error tolerance as valid measured values; An average calculator configured to calculate an average value of valid measured values selected by the valid value selector; A standard deviation calculator for calculating a standard deviation from the average value calculated by the average calculator and the valid measured values; A reliability verification unit that lowers the standard deviation to a predetermined value or less by deleting from the value having the highest deviation among the valid measurement values when the standard deviation calculated by the standard deviation calculation unit exceeds a set value; And a position mapping for mapping and storing the error occurrence position value calculated from the valid measurement values finally selected by the reliability verification unit and the precise measurement position value precisely measured for the fixed object at the same position using the precision measurement device. Information database;

The system receives a position value measured for a measurement target using a device equipped with a GPS receiving module, and provides an accurate position value for the corresponding measurement target by referring to mapping information stored in the location mapping information database. Position value providing unit; characterized in that it further comprises.

The method of calculating the error occurrence position value may be calculated by averaging valid measurement values finally selected by the reliability verification unit.

The error tolerance is set according to the characteristics of the GPS receiving module.

If the number of valid measurement values finally selected by the reliability verifier is less than a set number, the system may re-measure the fixed object and add position measurement values.

In order to achieve the above object, the precision position measuring method using the error characteristics of the GPS according to the present invention, using a precision measuring device for precisely measuring the actual position of the fixed object; Repeatedly measuring the position of the fixed object by a plurality of times using a device equipped with a GPS receiving module; Calculating one error occurrence position value from the plurality of position measurement values measured by the GPS receiving module; Mapping the calculated error occurrence position value and the precision measurement position value measured by the precision measuring device with respect to the fixed object and storing the data in a database; Measuring a position of a specific object by using the device equipped with the GPS receiving module; And calculating an accurate position value for the specific object by referring to mapping information of the precision measurement position value stored in the database from the position measurement value for the specific object measured by the GPS receiving module.

The calculating of the error occurrence position value may be performed by excluding a measurement value exceeding a set tolerance range among position measurement values measured by the GPS receiving module.

The error tolerance is set according to the characteristics of the GPS receiving module.

The method of calculating the error occurrence position value may be calculated by averaging a plurality of position measurement values measured by the GPS receiving module.

The calculating of the error occurrence position value may include: calculating an average value of a plurality of position measurement values measured by the GPS receiving module; Calculating a standard deviation from the average value calculated by the average calculating unit and the plurality of position measurement values; And when the standard deviation calculated by the standard deviation calculation unit exceeds a set value, lowering a standard deviation below a set value by deleting the measured value having the largest deviation among the plurality of measured values. It features.

The method may further include re-measuring the fixed object and adding position measurement values when the number of measurement values remaining after the deletion process is less than a set number.

According to the present invention, it is possible to precisely measure the position even when measuring using the GPS receiver module by correcting by using the error information inputted in the position measurement of the ground surface, the building, the underground buried material, etc. and the subsequent measurement where the position is fixed. have.

In particular, when re-exploring the surveyed point, it is possible to measure the exact position even through a smart phone including a GPS receiver module used by the general user, not a precision measurement device.

Accordingly, there is an advantage that can greatly increase the range of use of the smart phone by using in a variety of tasks related to precision position measurement.

1 is a view showing the concept of a precision position measurement system using the error characteristics of the GPS according to the present invention.
2 is a block diagram of a precision position measurement system using the error characteristics of the GPS according to an embodiment of the present invention.
3 is a flow chart showing a precise position measurement procedure using the error characteristics of the GPS according to the present invention.
4 is a flowchart illustrating an error occurrence position value determining procedure according to an embodiment of the present invention.
5 shows a measurement position on a map according to an embodiment of the invention.
6 is a view showing a mapping relationship between an error occurrence position value and a precision measurement position value according to an embodiment of the present invention.
7 shows a measurement position on a smartphone according to an embodiment of the invention.

The present invention generally proposes a system and method capable of precise position measurement through a GPS receiving module supported by a smartphone.

The GPS receiver module has a certain tolerance (eg 30m), and because of its low precision, it cannot be used for precision measurement. However, the present invention corrects the measurement result at the same point by using the fact that the error measured by the GPS receiving module is not significantly changed in the same device, the same condition, and the same place, thereby providing accurate position measurement values.

That is, it is not possible to solve the error occurs in the GPS receiver module itself, but if the same device is measured in the same place under the same conditions, the error does not change significantly, so the error is measured and quantified, and the same by storing the quantized value The measurement results at the point will be corrected.

In this way, accurate position measurement is possible by providing a corrected position value by using the error inputted in the position measurement and subsequent measurement of the ground surface, the building, the underground buried material, etc., to which the position is fixed.

On the other hand, it is preferable to use the ultra-precision measuring instrument which the error of a unit of cm generate | occur | produces for the initial precision measurement. The measurement result is then used as a reference to estimate the coordinates inversely through the error. In addition, the deviation of the error may vary due to the difference in measurement method and reception rate by device and module. Thus, when the initial measurement and the actual use of the device after the same, the use environment is closest to the measurement results are the best.

In the application of the present invention, there are always cases where the error becomes excessively large for various reasons, such as device failure, poor weather conditions, radio wave interference, and poor satellite reception conditions. Therefore, in order to solve the problem, the present invention undergoes a process of removing a value that is greater than an allowable range or separated from other measured values through a calculation formula.

In addition, it is preferable that the actual coordinates matching the coordinates calculated through the error match 1: 1. Otherwise, two or more actual coordinates may be generated as one value during actual measurement, and the value may become invalid.

DETAILED DESCRIPTION Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a view showing the concept of a precision position measurement system using the error characteristics of the GPS according to the present invention. Referring to FIG. 1, first, a precision measurement 110 is performed on an object to be fixed (for example, an earth surface, a building, an underground buried material, etc., to which a location is fixed) using a precision measuring device.

Then, the GPS position measurement value is repeatedly measured at the same place (that is, the fixed object) by using a GPS receiver (for example, a smartphone with a built-in GPS receiver module) or a GPS receiver module to be used for work. . The number of repeated measurements may be set in advance for the accuracy of the measurement, or may be determined by the user at random. As described above, the GPS position measurement values repeatedly measured are coordinates in which an error is generated, and the error occurrence position value for the fixed object is calculated based on a method described below from the plurality of repeatedly measured position measurement values (120). Done.

That is, the value measured by the precision measuring device is a precise position measurement value for the fixed object, the GPS position measurement values are measured values reflecting the error measured by the GPS receiver.

The plurality of measurement position values measured by the GPS receiver may have different values within an error range of the GPS receiver. Alternatively, a value outside the error of the GPS receiver may be measured. One error occurrence position value is determined from the plurality of measurement position values through the GPS receiver.

The method of determining the error occurrence position value is determined by calculating an average of the plurality of measurement position values. In this case, a position error with low reliability may occur due to a relatively large error among the plurality of measurement position values. Therefore, removing the measured value with low reliability and calculating the average can increase the reliability of the error.

Accordingly, the standard deviation of each measurement position value is calculated through the average of the plurality of measurement position values, and when the calculated standard deviation exceeds the set value, the position value having a large deviation is removed as an invalid value. By repeating this procedure, the standard deviation is reduced to an effective level.

On the other hand, if the invalid values are removed according to the above procedure, the number of position values serving as the sample of the measurement is low and the reliability is low. Therefore, in this case, it is desirable to eliminate other external factors affecting the measurement and re-measure.

When the error occurrence position value is determined through the reduction process as described above, the precision coordinate measurement value for which the precise coordinate measurement is performed for the fixed object and the calculated error occurrence position value are mapped and stored in the position mapping information database.

By performing the operation on many fixed objects, location mapping information for the fixed objects is stored in a database.

Subsequently, when an actual measurement 130 is performed through a GPS receiver for any fixed object among the stored fixed objects, an accurate position value is calculated by searching mapping information previously stored in the database.

That is, precise position measurement by the GPS receiver can be performed by calculating an accurate position value for the corresponding measurement target through the precise coordinate measurement value mapped to the error occurrence position value measured by the GPS receiver.

Hereinafter, a precision position measuring system and method according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4.

2 is a block diagram of a precision position measurement system using the error characteristics of the GPS according to an embodiment of the present invention. Referring to FIG. 2, the precision position measuring system 200 according to an exemplary embodiment of the present invention includes an effective value selecting unit 210, an average calculating unit 220, a standard deviation calculating unit 230, and a reliability searching unit 240. , The location mapping information database 250, the mapping information search unit 260, the location value providing unit 270, and the like.

First, the precision measurement position information measured using the precision measurement device for the fixed object is provided to the valid value selecting unit 210 and stored in the position mapping information database 250. In this case, the actual precision measuring device has a maximum precision of less than 2cm and has sufficient precision for general purpose use.

On the other hand, the GPS measurement information for the fixed object measured by a GPS receiver or a smart phone including a GPS receiving module is provided to the valid value selection unit 210. The GPS measurement information is measured and input a number of times set for the fixed object at the same position. For example, the position value may be measured 20 times for the same fixed object and used as data according to the present invention. In this case, preferably, the measurement under the same conditions with the same device may produce more reliable error.

Meanwhile, the valid value selecting unit 210 selects only valid values among the input GPS measurement information that do not exceed an error tolerance range (eg, 30 m) of the GPS receiving module. To this end, the difference between the GPS measurement information and the precision measurement information is calculated, and values whose distance exceeds an error tolerance range are discarded.

The tolerance of a typical GPS receiver module is within 30m. In other words, the error of more than 30m can be seen as abnormal in the measurement process. Thus, the distance between the GPS measurement coordinates and the precision measurement coordinates is calculated to remove these invalid measurements. At this time, the distance D can be obtained through Pythagorean theorem using latitude of 37m per second and 37m × cos (latitude) per second of longitude.

The difference between the GPS measurement information and the precision measurement information, that is, the error distance D may be calculated as in Equation 1 below.

In Equation 1, X 'denotes a latitude difference between GPS measurement coordinates and precision measurement coordinates, and Y' denotes a hardness difference between GPS measurement coordinates and precision measurement coordinates. In addition, X represents latitude on precision coordinates.

Through the above calculation, the value measured by the error distance of 30 m or more is excluded. On the other hand, since the allowable range may vary depending on the GPS receiving module, the removal reference distance is preferably adjusted according to the GPS receiving module. For example, when the tolerance range of the GPS receiver module is smaller, it is preferable to set a smaller error distance criterion for selecting the valid value.

The valid GPS measurement value selected by the valid value selector 210 is input to the average calculator 220, and the average calculator 220 calculates an average value of the measured values. In addition, the standard deviation calculator 230 calculates a standard deviation for the measured values from the average value calculated by the average calculator 220 and each measured value.

The standard deviation is used to determine how different the values are. In other words, the smaller the standard deviation with respect to the measurement coordinates, the more likely the measurement coordinates are in the approximate position. Therefore, the smaller the standard deviation, the higher the reliability of the mapping between the measured coordinates and the actual coordinates.

The standard deviation value calculated by the standard deviation calculator 230 is provided to the reliability verifier 240. If the calculated standard deviation value is larger than the set value, the reliability verification unit 240 determines that the reliability of the measured value is inferior, removes the measured value with a large deviation, and then calculates an average and a standard deviation again. By repeating this process, the standard deviation is reduced to an effective level.

On the other hand, even if the measurement coordinates deleted by the reliability verification unit 240, the coordinates are actually measured values. Therefore, the larger the deleted measured value, the less reliable the measured value is in the initial measurement.

Therefore, in consideration of this, the reliability decreases as much as the deleted result value. If the measured result value is deleted more than a certain number, the measurement itself is judged to be wrong, and after removing external factors affecting the measurement, the measurement is remeasured again. It is preferable to carry out.

As such, when the reliability verification through the reliability verification unit 240 is completed, the average position value of the plurality of selected measurement values and the precise measurement information for the same fixed object are mapped and stored in the location mapping information database 250. do.

Subsequently, when the actual measurement is performed at each measurement target position through the GPS receiver, the measured information is input to the mapping information search unit 260. In this case, the measured information is coordinates in which an error occurs according to the characteristics of the GPS receiving module.

After receiving the measured information, the mapping information retrieval unit 260 calculates the precise measurement coordinates corresponding to the measured information through the location mapping information database 250 to correspond to the location information providing unit 270. Provided by smartphone.

Hereinafter, a precise position measuring procedure according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4.

3 is a flowchart illustrating a precise position measurement procedure using the error characteristics of the GPS according to the present invention. Referring to FIG. 3, first, precision coordinates are measured through a precision measurement apparatus (S301). Then, the position value including the error is measured by the number of times set through the GPS receiver (S302). Next, one error occurrence position value is calculated from the position values including the plurality of errors (S303).

In this case, since the measurement value of which the standard deviation is excessively large in the process of calculating the error occurrence position value decreases in reliability, the reliability is finally verified through the standard deviation as described above (S304) and finally, the process of removing the corresponding value is performed. The error occurrence position value is calculated. The precise coordinates and the error occurrence position value are mapped and stored in the database (S305).

On the other hand, when the position is measured for the measurement target through the GPS receiver, the exact position value is calculated with reference to the value stored in the database (S307).

4 is a flowchart illustrating an error occurrence position value determining procedure according to an exemplary embodiment of the present invention. Steps S303 and S304 of FIG. 3 may be implemented in detail as shown in FIG. 4 according to an embodiment of the present invention.

Referring to FIG. 4, when the position value of the corresponding position is measured by the GPS receiver (S401), the measured position value is stored (S402). The measurement is repeated (S403) by a predetermined number of times (for example, N ₁ ), and the measurement value is reflected by some error depending on the characteristics of the GPS receiving module.

Meanwhile, among the values measured by the GPS receiver, values indicated by the precision measurement coordinate value measured by the precision measurement device and the error tolerance range (for example, 30 m or more) are invalid values and thus are removed (S404).

Then, the average and standard deviation are calculated with valid measured values (S405). At this time, when the standard deviation is greater than the predetermined value (eg, K) for each measurement value (S406), since the reliability of the measurement value is lowered, it is preferable to remove the measurement value having a large deviation (S407).

In this way, the standard deviation is reduced to an effective level by repeatedly performing a method of obtaining a mean and standard deviation to remove a value having low reliability.

On the other hand, if the measurement value deleted through the process is large, the remaining measurement value is smaller than the predetermined value (for example, N ₂ ) (S408) because there is a problem in the measurement itself, external factors affecting the measurement It is desirable to remove and re-measure.

Finally, an error occurrence position value is determined as an average value of the measured values calculated as values satisfying the above conditions (S409).

The position measurement system and method according to the present invention have been described above. Hereinafter, an example of actually measuring a position will be described with reference to FIGS. 5 to 7.

5 is a view showing a measurement position on the map according to an embodiment of the present invention. Referring to FIG. 5, reference numerals 501, 511, and 520 are measured values measured by a GPS receiver, and 540 is a position value measured using a precision measuring device.

Among the measured values measured by the GPS receiver, the measured value 520 outside the tolerance limit region 510 is deleted beyond the error tolerance range of the GPS receiver module, and thus is primarily deleted. For example, when the error tolerance range of the general GPS receiving module is within 30m, the tolerance limit region 510 may be set to a radius of 30m. Therefore, values measured at a distance of 30m or more, that is, the tolerance limit region 510 (ie, No. 520) are preferentially deleted and are not used for determining an error occurrence position value.

As such, when the measured values are first removed according to the tolerance area 510, an average and a standard deviation are calculated based on the measured values in the tolerance area 510. Then, for the values that fall outside the set value through the calculated standard deviation, it is determined that the measured value is not reliable, and is deleted or deteriorated. Accordingly, the measured value 511 outside the effective population area 500 because the standard deviation is larger than the set value may be deleted.

Therefore, the error occurrence position value 530 is calculated from the measured values within the set value, that is, the measured values belonging to the effective population area 500 (that is, measured value 501). In this case, the error occurrence position value may be calculated as an average value of measured values (ie, measured value 501) belonging to the effective population area 500.

As such, the determined error occurrence position value 530 is mapped to the precise measurement position value 540 which is the actual exact position value at the measurement position and stored in the database. Therefore, when the position value measured by the GPS receiver is measured as the position 530, as shown in FIG. 6, the position value 540 mapped and stored therein is provided as the correct position value. 6 is a diagram illustrating a mapping relationship between an error occurrence position value and a precision measurement position value according to an exemplary embodiment of the present invention. That is, referring to Figure 6, according to the present invention by mapping the position of the error measured in advance to provide the actual position value.

7 is a view showing a measurement position on a smartphone according to an embodiment of the present invention. Referring to FIG. 7, the left graph is a graph in which a position is measured by a smartphone for a point 1, and the right graph is a graph in which a position is measured by a smartphone for a point 2.

Referring to the graph on the left, it was found that most of the results were adjacent to the mean point except for the results of Day 1 and Day 3, and the standard deviation was small. Therefore, a point close to the average point is very likely to be measured in the measurement of the precision measurement point and thus can be used as a reliable measurement value.

On the other hand, if you refer to the graph on the right, the standard deviation of each value is large and some measurement results show distances beyond the real point and error confidence range of 30m. In this case, the error occurrence position value is determined by removing the incorrectly measured value and selecting only valid measured values according to the above-described present invention. In addition, there may be a problem with the measurement itself, so it is possible to eliminate the external factors affecting the measurement and re-measure.

When the result of the graph is shown in a table, it is as shown in Table 1 and Table 2.

Point 1 Latitude Hardness Street Day 1



37.51760353 127.01692907 23.69406312 37.51757336 127.01686755 5.96338371 37.51754327 127.01688708 17.86302844 37.51757918 127.01686788 5.17272863 37.51755978 127.01686755 9.71333187 Day 2



37.51755936 127.01688842 13.79576134 37.51755136 127.01686185 11.95025528 37.51756644 127.01686663 7.53003963 37.51758417 127.01688247 9.19116588 37.51757927 127.01688448 9.80431140 Day 3



37.51757864 127.01690024 14.26709607 37.51757038 127.01688775 11.55017202 37.51756871 127.01685539 5.27530757 37.51760881 127.01685221 9.79713494 37.51758664 127.01689303 12.25963358 Day 4



37.51758384 127.01685732 2.11482929 37.51757012 127.01687300 7.91446665 37.51756778 127.01689043 12.63473108 37.51756825 127.01687124 7.94848022 37.51757843 127.01688523 10.05573266 Precision measuring coordinate 37.31032966 127.01006604 8.59564004

Point 2 Latitude Hardness Street Day 1



37.51761904 127.01609541 28.93466502 37.51762097 127.01603447 12.05674820 37.51760974 127.01601595 6.33506728 37.51759536 127.01599600 6.03148597 37.51761523 127.01598351 3.19043922 Day 2



37.51762290 127.01606439 20.45178006 37.51760391 127.01606448 20.24198669 37.51758840 127.01606255 21.29728887 37.51760182 127.01603003 10.90024932 37.51758597 127.01603766 15.64063678 Day 3



37.51762918 127.01599030 6.58802925 37.51761070 127.01601645 6.44849065 37.51762248 127.01615056 44.60404367 37.51766983 127.01607445 31.42595313 37.51766040 127.01604260 22.76365612 Day 4



37.51772754 127.01603849 44.74506187 37.51768086 127.01604545 29.53060590 37.51768656 127.01606976 35.12569279 37.51768966 127.01606381 35.05761417 37.51763450 127.01604797 17.55414354 Precision measuring coordinate 37.31034016 127.00575774 16.98523085

Referring to <Table 1> and <Table 2>, although there is a difference in distance in the case of point 1 of <Table 1>, except for some measured values, the overall difference in distance is shown. It is uniformly distributed within a very close range from the precise measurement coordinates. Therefore, it can be seen that the reliability of the measured values measured at point 1 is very high.

On the other hand, in the case of point 2 in <Table 2>, the distance is not uniform as a whole, and in some cases, the difference occurs more than 40m. In this case, it is preferable to select or use only the measured value which has improved the reliability as much as possible based on the distance and the deviation.

<Table 3> is a table in which the average and standard deviation are calculated using the measured values of Tables 1 and 2.

Deviation Measuring position Average distance Standard Deviation Day 1
number 1 10.31909871 7.18678167 No.2 8.88309484 9.27066753 Day 2
number 1 9.21350680 2.18963640 No.2 16.95080067 3.93578097 Day 3
number 1 7.82377609 3.03635588 No.2 19.98708428 14.69069728 Day 4
number 1 7.86576703 3.47167581 No.2 31.58548556 8.89410714 all
number 1 8.59564004 4.67006026 No.2 16.98523085 12.57956503

Referring to <Table 3>, it can be seen from the actual calculation that point 1 shows an excellent standard deviation as a whole, and that the standard deviation of point 2 is relatively large. Therefore, in the case of the measured value of the second point, it is necessary to remove a measured value having a high standard deviation and to find only a valid measured value according to an embodiment of the present invention.

On the other hand, in the embodiment of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

110: fixed object precision measurement 120: error occurrence position value calculation
130: actual measurement 200: precision position measurement system
210: Effective value selector 220: Average calculator
230: standard deviation calculator 240: reliability verification unit
250: location mapping information database
260: mapping information search unit 270: location value provider
500: effective population area 501, 511, 520: GPS measurement value
510: tolerance limit area 530: error occurrence position value
540: precision measurement position value

Claims (11)

An effective value selector which receives position measurement values for a fixed object repeatedly measured a plurality of times using a device equipped with a GPS receiving module, and selects measurement values within a set error tolerance as valid measurement values;
An average calculator configured to calculate an average value of valid measured values selected by the valid value selector;
A standard deviation calculator for calculating a standard deviation from the average value calculated by the average calculator and the valid measured values;
A reliability verification unit that lowers the standard deviation to a predetermined value or less by deleting from the value having the highest deviation among the valid measurement values when the standard deviation calculated by the standard deviation calculation unit exceeds a set value; And
Position mapping information for mapping and storing the precise position of the precise measurement of the fixed object at the same position by using an error occurrence position value and the precision measuring device calculated from the valid measurement values finally selected by the reliability verification unit Database, wherein the method for calculating an error occurrence position value is calculated by averaging valid measured values finally selected by the reliability verification unit;
Precision position measurement system using the error characteristics of the GPS comprising a.
The system of claim 1, wherein the system is
A position value providing unit receiving a position value measured for the measurement target using a device equipped with a GPS receiving module, and providing an accurate position value for the measurement target by referring to mapping information stored in the position mapping information database; Precision position measurement system using the error characteristic of the GPS, characterized in that it further comprises.
delete The method of claim 1, wherein the setting of the error tolerance range is
Precision position measurement system using the error characteristics of the GPS, characterized in that set according to the characteristics of the GPS receiving module.
The system of claim 1, wherein the system is
And when the number of valid measurement values finally selected by the reliability verifier is less than the set number, re-measure the fixed object and add position measurement values.
Precisely measuring an actual position with respect to the fixed object using the precision measuring device;
Repeatedly measuring the position of the fixed object by a plurality of times using a device equipped with a GPS receiving module;
Calculating one error occurrence position value from the plurality of position measurement values measured by the GPS receiving module, wherein the calculation of the error occurrence position value is set among the position measurement values measured by the GPS receiving module. Calculating by averaging position measurements except those exceeding an error tolerance;
Mapping the calculated error occurrence position value and the precision measurement position value measured by the precision measuring device with respect to the fixed object and storing the data in a database;
Measuring a position of a specific object by using the device equipped with the GPS receiving module; And
Calculating an accurate position value for the specific object by referring to mapping information of the precise measurement position value stored in the database from the position measurement value for the specific object measured by the GPS receiving module; Precise position measurement method using
delete The method of claim 6, wherein the setting of the error tolerance range,
Precision position measurement method using the error characteristics of the GPS, characterized in that set according to the characteristics of the GPS receiving module.
The method of claim 6, wherein the error generating position value is calculated.
Precision position measurement method using the error characteristics of the GPS, characterized in that for calculating the average of a plurality of position measurement values measured by the GPS receiving module.
The method of claim 6, wherein the calculating of the error occurrence position value comprises:
Calculating an average value of the plurality of position measurement values measured by the GPS receiving module;
Calculating a standard deviation from the average value calculated by the average calculating unit and the plurality of position measurement values; And
If the standard deviation calculated by the standard deviation calculation unit exceeds a set value, lowering the standard deviation to a set value or less by deleting the measured value having the largest deviation among the plurality of measured values; Precise position measurement method using error characteristics of GPS.
The method of claim 10, wherein
And if the number of remaining measurement values after the deletion process is less than the set number, re-measurement of the fixed object to add position measurement values.

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