TWI417520B - Electronic device and method for detecting errors of gps of the electronic device - Google Patents

Description

Electronic device and GPS error detecting method thereof

The invention relates to a detection method, in particular to an electronic device and a GPS error detection method thereof.

With the rapid advancement of technology, electronic technology has been continuously developed, and various auxiliary functions applied to electronic devices are increasing. More and more electronic devices are equipped with GPS to obtain positioning information of the electronic device, such as a car, a mobile phone, and the like. However, the position of the GPS display electronic device is usually not on the road due to the error of the GPS, or is not in the actual position of the electronic device, which causes trouble to the user.

In view of the above, it is necessary to provide an electronic device and a GPS error detecting method thereof, which can instantly detect an error of a GPS installed in an electronic device.

An electronic device includes a GPS unit, the electronic device further comprising a GPS error detection system, the GPS error detection system comprising: an acquisition module, configured to collect from an electronic map of the electronic device every other time interval The movement speed and position of the electronic device, the coordinate value corresponding to the position is a first coordinate value; the route estimation module is configured to: according to the collected moving speed of the electronic device and the position and the first coordinate value of the electronic device Estimating the actual location of the electronic device and its coordinate value, the seat The value is a second coordinate value, and the road where the electronic device is located is estimated according to the second coordinate value; and the calculation module is configured to calculate the road when the estimated road where the electronic device is located is parallel to the longitude line The difference between the first landmark value and the second coordinate value in the latitude direction. When the estimated road where the electronic device is located is parallel to the latitude line, the first coordinate value and the second coordinate value are calculated in the longitude. The offset difference in the direction, when the predicted road where the electronic device is located is neither parallel to the longitude line nor parallel to the latitude line, respectively decompose the first coordinate value and the second coordinate value into the longitude line and the latitude On the line, calculate the offset value between the coordinate value of the first coordinate value decomposed to the longitude line and the coordinate value of the second coordinate value decomposed into the longitude line, and calculate the coordinate value of the first coordinate value decomposed to the latitude line and the second The coordinate value is decomposed into an offset difference between coordinate values on the latitude line; and a calibration module is configured to calibrate the GPS unit based on the second coordinate value of the electronic device and the calculated offset difference.

A GPS error detection method is applied to an electronic device, the electronic device comprising a GPS unit, the method comprising the steps of: (a) collecting the movement of the electronic device from an electronic map of the electronic device at every other time interval a speed and a position of the electronic device, the coordinate value corresponding to the position is a first coordinate value; (b) estimating the location of the electronic device according to the moving speed of the electronic device and the position of the electronic device and the first coordinate value The actual position and its coordinate value, the coordinate value is the second coordinate value, and the road where the electronic device is located is estimated according to the second coordinate value, and then steps (c), (d) or (e); (c) are performed. Calculating an offset difference between the first coordinate value and the second coordinate value in a latitude direction when the estimated road where the electronic device is located is parallel to the longitude line; (d) when the estimated electronic device is When the road where the road is parallel to the latitude line, calculate the first coordinate value and the second coordinate value in the longitude direction Offset difference; (e) Decompose the first coordinate value and the second coordinate value into the longitude line and the latitude when the predicted road where the electronic device is located is neither parallel to the longitude line nor parallel to the latitude line On the line, calculate the offset value between the coordinate value of the first coordinate value decomposed to the longitude line and the coordinate value of the second coordinate value decomposed into the longitude line, and calculate the coordinate value of the first coordinate value decomposed to the latitude line and the second The coordinate value is decomposed into an offset difference between coordinate values on the latitude line; and (f) the GPS unit is calibrated based on the second coordinate value of the electronic device and the calculated offset difference.

Compared with the prior art, the electronic device and the GPS error detecting method use the position of the electronic device displayed on the electronic map to detect the GPS error, so that the GPS is calibrated in time.

1‧‧‧Electronic device

10‧‧‧GPS error detection system

11‧‧‧GPS unit

12‧‧‧ display screen

13‧‧‧Database

100‧‧‧ receiving module

101‧‧‧ Acquisition module

102‧‧‧ route estimation module

103‧‧‧Judgement module

104‧‧‧Computation Module

105‧‧‧ Calibration Module

106‧‧‧Display module

1 is a hardware structural diagram of a preferred embodiment of an electronic device of the present invention.

2 is a functional block diagram of the GPS error detection system 10 of FIG.

3 is a flow chart showing the operation of the preferred embodiment of the GPS error detecting method of the present invention.

Figure 4 is a schematic diagram of the road on which the electronic device is estimated.

Figure 5 is a schematic diagram of the road where the electronic device is located, which is neither parallel to the longitude line nor parallel to the latitude line.

1 is a hardware architecture diagram of a preferred embodiment of an electronic device of the present invention. The electronic device 1 includes a Global Position System (GPS) error detection system 10, a GPS unit 11, a display screen 12, and a database 13. In this embodiment, the electronic device 1 may be a car navigation device, a mobile phone, or the like. The database 13 is stored An electronic map is displayed, and the display screen 12 displays the electronic map. The GPS unit 11 is configured to detect the location of the electronic device 1 and display the detected location of the electronic device 1 and its coordinate value on the electronic map. The data bank 13 also stores an error range allowed by the electronic map when displaying the position and coordinate value of the electronic device 1, and the allowable error range includes an error range in the longitude direction and an error range in the latitude direction.

As shown in FIG. 2, it is a functional module diagram of the GPS error detection system 10 in FIG. The GPS error detection system 10 includes a receiving module 100, an acquisition module 101, a route estimation module 102, a determination module 103, a calculation module 104, a calibration module 105, and a display module 106. The module is a software program segment having a specific function, and the software is stored in a computer readable storage medium or other storage device, and can be executed by a computer or other computing device including a processor, thereby completing the detection GPS unit 11 of the present invention. The error of the workflow.

The receiving module 100 is configured to receive a time interval T for collecting the position of the electronic device 1 at a timing input by a user.

The acquisition module 101 is configured to collect the moving speed of the electronic device 1 and the position of the electronic device 1 and its coordinate value (hereinafter referred to as a first coordinate value) from the electronic map displayed on the display screen 12 at intervals T.

The route estimation module 102 is configured to estimate the actual position of the electronic device 1 and its coordinate value according to the collected moving speed of the electronic device 1 and the position and the first coordinate value of the electronic device 1 (hereinafter referred to as The second coordinate value is used, and the road where the electronic device 1 is located is estimated according to the estimated actual position and the second coordinate value of the electronic device 1. Lift For example, as shown in FIG. 4, the positions of the electronic device 1 collected by the acquisition module 101 at times t1, t2, and t3 are A, B, and C, respectively. Both positions A and B are on the road L, and only the position C is not on the road L. Due to the error, the route estimation module 102 estimates that the electronic device 1 cannot run to the point C at time t3 according to the position of the three points and the moving speed of the electronic device 1, but at C1, that is, The route estimation module 102 predicts that the electronic device 1 moves on the road L.

The judging module 103 is configured to judge whether the predicted road where the electronic device 1 is located is parallel to the longitude line or the latitude line.

When the road where the electronic device 1 is located is estimated to be parallel to the longitude line, the calculation module 104 is configured to calculate an offset difference between the first coordinate value and the second coordinate value in the latitude direction, as shown in FIG. Since the road L is parallel to the longitude line, the calculation module 104 calculates an offset difference between the first coordinate value and the second coordinate value in the latitude direction, that is, the abscissa value and the second value in the first coordinate value. The difference between the abscissa values in the coordinate values.

When the road where the electronic device 1 is located is parallel to the latitude line, the calculation module 104 is further configured to calculate an offset difference between the first coordinate value and the second coordinate value in the longitude direction, that is, the first coordinate value. The difference between the ordinate value and the ordinate value in the second coordinate value.

When the road where the electronic device 1 is located is neither parallel to the longitude line nor parallel to the latitude line, the calculation module 104 is configured to respectively decompose the first coordinate value and the second coordinate value into the longitude line and the latitude line, and then calculate The first value is decomposed into the offset value between the coordinate value on the longitude line and the coordinate value decomposed into the longitude line on the longitude line, and the coordinate value and the second coordinate value of the first coordinate value decomposed into the latitude line are decomposed into Latitude line The offset difference between the coordinate values on the upper side, as shown in FIG. 5, the road L1 is neither parallel to the longitude line nor parallel to the latitude line, and the point M(X, Y) is estimated by the route estimation module 102. The position of the obtained electronic device 1 and the point N(P, Q) are the positions of the electronic device 1 displayed on the electronic map. The coordinate value of the point M(X, Y) decomposed into the longitude direction is (X1, Y1), and the coordinate value decomposed into the latitude direction is (X2, Y2). The coordinate value of the point N(P, Q) decomposed into the longitude direction is (P1, Q1), and the coordinate value decomposed into the latitude direction is (P2, Q2). The calculation module 104 calculates the offset difference between the point M and the point N in the longitude direction as (X1-P1, Y1-Q1), and the offset difference between the point M and the point N in the latitude direction is (X2-P2, Y2- Q2).

The determining module 103 is further configured to determine whether the calculated offset difference is within an allowable error range. When the offset difference is not within the allowable error range, the calibration module 105 is configured to calibrate the GPS unit 11 according to the second coordinate value of the electronic device 1 and the offset difference. The GPS unit 11 does not require calibration when the offset difference is within an allowable error range.

The calibrated GPS unit 11 re-detects the position of the electronic device 1 and its coordinate value, and the display module 106 is configured to display the position of the electronic device 1 and its coordinate value on the electronic map displayed on the display screen 12.

As shown in FIG. 3, it is a flowchart of a preferred embodiment of the GPS error detecting method of the present invention.

In step S30, the receiving module 100 receives the time interval T at which the position of the electronic device 1 is collected by the timing input by the user.

Step S31, the collection module 101 displays the electrons from the display screen 12 at intervals T. The moving speed of the electronic device 1 and the position of the electronic device and its coordinate value (hereinafter referred to as a first coordinate value) are acquired on the map.

In step S32, the route estimation module 102 estimates the actual position of the electronic device 1 and its coordinate value according to the collected moving speed of the electronic device 1 and the position and the first coordinate value of the electronic device 1 (hereinafter referred to as The second coordinate value is used, and the road where the electronic device 1 is located is estimated based on the estimated position of the electronic device 1 and the second coordinate value. For example, as shown in FIG. 4, if the acquisition module 101 is at the time t1, t2, and t3, the positions of the electronic devices 1 collected from the electronic map are A, B, and C, respectively. Both positions A and B are on the road L, and only the position C is not on the road L. Due to the error, the route estimation module 102 estimates that the electronic device 1 cannot run to the point C at time t3 according to the position of the three points and the moving speed of the electronic device 1, but at C1, that is, The route estimation module 102 predicts that the electronic device 1 moves on the road L.

In step S33, the determining module 103 determines whether the predicted road where the electronic device 1 is located is parallel to the longitude line. If the road where the electronic device 1 is located is parallel to the longitude line, step S34 is performed. If the road on which the electronic device 1 is located is not parallel to the longitude line, step S38 is performed.

Step S34, the calculation module 104 calculates an offset difference between the first coordinate value and the second coordinate value in the latitude direction. As shown in FIG. 4, since the road L is parallel to the longitude line, the calculation module 104 Calculating an offset difference between the first coordinate value and the second coordinate value in the latitude direction, that is, a difference between the abscissa value in the first coordinate value and the abscissa value in the second coordinate value.

In step S35, the determining module 103 is further configured to determine whether the calculated offset difference is within an allowable error range. When the offset difference is not within the allowable error range, step S36 is performed. When the offset difference is within the allowable error range, the flow is ended.

In step S36, the calibration module 105 is configured to calibrate the GPS unit 11 according to the second coordinate value of the electronic device 1 and the offset error.

In step S37, the calibrated GPS unit 11 re-detects the position of the electronic device 1, and the display module 106 displays the position of the electronic device 1 and its coordinate value on the electronic map displayed on the display screen 12.

In step S38, the determining module 103 determines whether the predicted road where the electronic device 1 is located is parallel to the latitude line. If the road where the electronic device 1 is located is parallel to the latitude line, in step S39, the calculation module 104 calculates an offset difference between the first coordinate value and the second coordinate value in the longitude direction, that is, the first coordinate The difference between the ordinate value in the value and the ordinate value in the second coordinate value, and the flow proceeds to step S35. If the road on which the electronic device 1 is located is neither parallel to the longitude line nor parallel to the latitude line, step S40 is performed.

In step S40, the calculation module 104 decomposes the first coordinate value and the second coordinate value into the longitude line and the latitude line respectively, and then calculates the coordinate value and the second coordinate value decomposed into the longitude line of the first coordinate value and decomposed into the longitude line. The offset difference between the coordinate values, and the offset value between the coordinate value of the first coordinate value decomposed to the latitude line and the coordinate value of the second coordinate value decomposed into the latitude line, and the flow proceeds to step S35.

For example, as shown in FIG. 5, the road L1 is neither parallel to the longitude line nor parallel to The latitude line, the point M(X, Y) is the position of the electronic device 1 estimated by the route estimation module 102, and the point N(P, Q) is the position of the electronic device 1 displayed on the electronic map. The coordinate value of the point M(X, Y) decomposed into the longitude direction is (X1, Y1), and the coordinate value decomposed into the latitude direction is (X2, Y2). The coordinate value of the point N(P, Q) decomposed into the longitude direction is (P1, Q1), and the coordinate value decomposed into the latitude direction is (P2, Q2). The calculation module 104 calculates the offset difference between the point M and the point N in the longitude direction as (X1-P1, Y1-Q1), and the offset difference between the point M and the point N in the latitude direction is (X2-P2, Y2- Q2).

It should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments thereof The technical solutions are modified or equivalently substituted without departing from the spirit and scope of the technical solutions of the present invention.

10‧‧‧GPS error detection system

100‧‧‧ receiving module

101‧‧‧ Acquisition module

102‧‧‧ route estimation module

103‧‧‧Judgement module

104‧‧‧Computation Module

105‧‧‧ Calibration Module

106‧‧‧Display module

Claims (7)

An electronic device includes a GPS unit, the electronic device further comprising a GPS error detection system, the GPS error detection system comprising: an acquisition module, configured to collect from an electronic map of the electronic device every other time interval The movement speed and position of the electronic device, the coordinate value corresponding to the position is a first coordinate value; the route estimation module is configured to: according to the collected moving speed of the electronic device and the position and the first coordinate value of the electronic device Estimating the actual position of the electronic device and the coordinate value of the actual position, the coordinate value is the second coordinate value, and estimating the road where the electronic device is located according to the second coordinate value; the calculation module is used to pre- Calculating the offset difference between the first coordinate value and the second coordinate value in the latitude direction when the estimated road where the electronic device is located is parallel to the longitude line, when the estimated road where the electronic device is located is parallel to a latitude line, calculating an offset difference between the first coordinate value and the second coordinate value in the longitude direction, when the estimated road where the electronic device is located is not parallel to the longitude line Parallel to the latitude line, the first coordinate value and the second coordinate value are respectively decomposed into the longitude line and the latitude line, and the coordinate value of the first coordinate value decomposed into the longitude line and the coordinate value of the second coordinate value decomposed into the longitude line are calculated. The offset difference between the offset value and the offset value between the coordinate value of the first coordinate value decomposed to the latitude line and the coordinate value of the second coordinate value decomposed into the latitude line; and a calibration module for the electronic The GPS unit is calibrated by a second coordinate value of the device and the calculated offset difference. The electronic device of claim 1, wherein the GPS error detection system further comprises a determining module, configured to determine whether the calculated offset difference is within an allowable error range. The electronic device of claim 1, wherein after the calibration module calibrates the GPS unit, the GPS unit is further configured to re-detect the position of the electronic device and the coordinate value of the position. The electronic device of claim 3, wherein the GPS error detection system further comprises a display module for displaying the position of the re-measured electronic device and the coordinate value of the position on the electronic map. A GPS error detection method is applied to an electronic device, the electronic device comprising a GPS unit, the method comprising the steps of: (a) collecting the movement of the electronic device from an electronic map of the electronic device at every other time interval a speed and a position of the electronic device, the coordinate value corresponding to the position is a first coordinate value; (b) estimating the location of the electronic device according to the moving speed of the electronic device and the position of the electronic device and the first coordinate value The actual position and the coordinate value of the actual position, the coordinate value is a second coordinate value, and the road where the electronic device is located is estimated according to the second coordinate value, and then steps (c), (d) or (e) are performed; (c) calculating an offset difference between the first coordinate value and the second coordinate value in the latitude direction when the estimated road on which the electronic device is located is parallel to the longitude line; (d) when estimated When the road where the electronic device is located is parallel to the latitude line, the offset difference between the first coordinate value and the second coordinate value in the longitude direction is calculated; (e) when the estimated road where the electronic device is located is neither Parallel to the longitude line is not parallel Latitude line, respectively, a first coordinate value and second coordinate value decomposition to the line of longitude And the latitude line, calculating the offset value between the coordinate value of the first coordinate value decomposed to the longitude line and the coordinate value of the second coordinate value decomposed into the longitude line, and calculating the coordinate value of the first coordinate value decomposed into the latitude line and The second coordinate value is decomposed into an offset difference between coordinate values on the latitude line; and (f) the GPS unit is calibrated based on the second coordinate value of the electronic device and the calculated offset difference. The method for detecting a GPS error according to claim 5, wherein before the step (f), the method further comprises: determining whether the calculated offset difference is within an allowable error range; If the difference is not within the allowable error range, then step (f) is performed; and if the offset difference is within the allowable error range, the process ends. The method for detecting a GPS error according to claim 5, wherein after the step (f), the method further comprises: the calibrated GPS unit re-detecting the position of the electronic device and the coordinate value of the position; The position of the re-detected electronic device and the coordinate value of the location are displayed on the electronic map.