CN1755328B - Driving image display method of navigation system - Google Patents

Abstract

The map data can be displayed on the display panel in a state independent of the slight change in the rotation angle of the moving object or the value of the input error range of the GPS receiving signal and the sensor signal, even if it is consistent with the traveling direction of the moving object without shaking; and , even if the rotation angle of the moving object changes sharply due to the moving object leaving the driving path and rotating, the digital map data displayed on the display panel will not be rotated temporarily, but will be rotated and displayed sequentially and gently. At the initial stage of the moving object, after setting the rotation critical angle of the map data and initializing the accumulated rotation angle, the rotation angle of the moving object is measured and the measured rotation angle and the accumulated rotation angle are accumulated. It is judged whether the accumulated rotation angle is above the set rotation critical angle. When the accumulated rotation angle is not above the rotation critical angle, it is repeatedly executed to measure the rotation angle of the moving object and the measured rotation angle is combined with the accumulated rotation angle. The action of accumulating the rotation angle.

Description

Driving image display method of navigation system

【Technical field】

As far as the navigation system is concerned, the present invention relates to a digital map display method of the navigation system which rotates the digital map displayed in the image according to the traveling direction of the moving object so that the display direction of the digital map is consistent with the traveling direction of the moving object.

【Background technique】

In general, a navigation system provides the following functions: using the transmission signals emitted by multiple artificial satellites belonging to the Global Positioning System (GPS) and multiple sensors installed on moving objects together with gyroscopes (gyro) and speed sensors. The detection signal of the moving object is used to calculate the current position of the moving object; after the calculated current position of the moving object is consistent with the digital map data, the driving path from the current position to the destination is surveyed and the moving object navigating while driving.

In particular, in an omnidirectional (full) navigation system that simultaneously displays the position and route of a moving object on a digital map and navigates the driving route of the moving object, the map data displayed in the image is rotated according to the driving direction of the moving object, The composition of the road actually traveling and similar driving navigation images are provided to the user of the moving object.

In the case of rotating and displaying the map data according to the driving direction of the moving object as above, it is generally based on receiving signals from multiple artificial satellites and receiving GPS signals from the gyroscope and electronic compass installed on the moving object. The map data is rotated based on the collected rotation angle of the moving object, or the map data is rotated based on the angle of the road on which the moving object travels.

FIG. 1 is a signal flow chart showing a conventional driving image display method. As shown in the figure, in step 100, the signals of sensors such as the GPS receiving signal and the gyroscope and electronic compass set in the moving object are input; The signal of sensors such as the gyroscope and electronic compass is used to calculate the current position information of the moving object.

In step 104, compare the current position information of the calculated moving object with the previous position information of the moving object, and calculate the rotation angle of the moving object; in step 106, set the calculated rotation angle of the moving object as a map After the rotation angle of the data, in step 108, the map data is rotated according to the set rotation angle of the map data; in step 110, the driving navigation image of the moving object is generated according to the rotated map data and displayed on the display panel .

However, in the prior art described above, the map data is rotated and displayed according to the rotation angle of the moving object, so whenever the map data is updated and displayed on the display panel, the map data will be displayed according to the route change of the moving object, etc. The map data is rotated and displayed by a slight change in the rotation angle or the value of the input error range of the GPS reception signal and the sensor signal.

That is, in FIGS. 2a to 2c, symbol 200 is the traveling route of the moving object, and symbol 202 is the position of the moving object measured based on the GPS reception signal and the sensor signal. When the moving object is detected as shown in FIG. 2 a, it travels along the travel route 200 as shown by the arrow and rotates to the left at the position (P1), then the map data is rotated to the right as shown in FIG. 2 b and Display; under the situation that detects that the moving object as shown in Figure 2b rotates to the right after passing through the position (P3) from the position (P2) and travels to the position P4, then as shown in Figure 2c, make the map data to the left Rotate sideways and display.

Therefore, there is a problem that the driving navigation image of the moving object displayed on the display panel frequently rotates and shakes, which dazzles the driver of the moving object and brings many obstacles to safe driving.

【Content of invention】

Therefore, it is an object of the present invention to provide a driving image display method for a navigation system capable of displaying a map on a display panel with a slight change in the rotation angle of a moving object or a value within the input error range of a GPS reception signal and a sensor signal. Data, even if it is in the same direction as the moving object, it will not shake.

Another object of the present invention is to provide a driving image display method for a navigation system that does not temporarily rotate the digital map data displayed on the display panel even if the rotation angle of the moving object changes suddenly due to the moving object leaving the driving path or rotating. , but rotate smoothly and display in sequence.

The driving image display method of the navigation system of the present invention having the above object is characterized as follows:

At the initial stage of the moving object, after setting the rotation critical angle of the map data and initializing the accumulated rotation angle, the rotation angle of the moving object is measured and the measured rotation angle and the accumulated rotation angle are accumulated. It is judged whether the accumulated rotation angle is above the set rotation critical angle. When the accumulated rotation angle is not above the rotation critical angle, it is repeatedly executed to measure the rotation angle of the moving object and the measured rotation angle is combined with the accumulated rotation angle. The action of accumulating the rotation angle; when the accumulated rotation angle is above the rotation critical angle, after the map data is rotated and displayed according to the rotation angle of the moving object, and the rotation angle is initialized, the rotation of the moving object is repeatedly measured Angle and the action of accumulating the measured rotation angle and the accumulated rotation angle. As explained above, the present invention accumulates the rotation angle of the moving object, and when the accumulated rotation angle reaches above the predetermined rotation critical angle, the map data is rotated and displayed, so not only can the The driving path of the moving object is displayed without the map data shaking, and even if the rotation angle of the moving object changes sharply, the map data does not rotate sharply, but rotates smoothly one by one, so that the user of the moving object can safely and accurately Driving route navigation.

【Description of drawings】

FIG. 1 is a signal flow chart showing a conventional driving image display method.

2a to 2c are schematic diagrams for illustrating driving navigation images displayed on a display panel according to an existing driving image display method.

FIG. 3 is a configuration diagram showing the configuration of a navigation system to which the driving image display method of the present invention is applied.

FIG. 4 is a signal flow chart showing the driving image display method of the present invention.

FIGS. 5a to 5c and FIGS. 6a to 6c are schematic diagrams for illustrating the driving navigation image displayed on the display panel according to the driving image display method of the present invention.

【Detailed ways】

Hereinafter, the driving image display method of the navigation system of the present invention will be described in detail with reference to FIG. 3 and the schematic diagram.

FIG. 3 is a configuration diagram showing the configuration of a navigation system to which the driving image display method of the present invention is applied. As shown in the figure, it consists of the following components: a GPS receiving unit 302 for receiving position data transmitted by more than three GPS satellites 300; a sensor 304 such as a gyroscope and an electronic compass that is installed on a moving object to detect the rotation angle of the moving object; Store the map data storage unit 306 of map data in advance; Obtain the command input unit 308 of command according to the user's operation; Judging the current position and rotation angle of the moving object, and referring to the map data stored in the map data storage unit 306, the travel route from the determined current position of the moving object to the destination input through the command input unit 308 While performing navigation, the main control unit 310 that rotates the map data according to the rotation angle of the moving object and makes the driving direction of the moving object consistent with the display direction of the map data; The display drive unit 312 that rotates to display the map data consistent with the traveling direction of the moving object, the current position of the moving object and the route to be driven, etc.; Audio signal navigation unit 316 for path navigation.

With the above-mentioned navigation system, when the user inputs the destination through the command input unit 318 and the moving object travels, the GPS data received by the GPS receiving unit and the detection signal of the sensor unit 304 by the main control unit 310 affect the movement of the moving object. The current position and the rotation angle are judged, and the map data of the travel route from the judged current position to the destination is read from the map data storage unit 316 .

If the map data is read, the main control unit 310, after rotating the read map data according to the rotation angle of the moving object, outputs it together with the current position of the moving object to the display drive unit 312, and then displays it on the display panel 314 At the same time, through the audio navigation unit 316, the speaker 318 outputs the navigation audio of the traveling path of the moving object and navigates the traveling path of the moving object.

FIG. 4 is a signal flow chart showing the driving image display method of the present invention. As shown in the figure, at the initial stage of operation of the navigation system, in step 400 , the main control unit 310 sets the rotation critical angle for rotating and displaying the map data through an initialization action. Here, the rotation critical angle is set in advance according to the slight change in the rotation angle of the moving object or the value of the input error range of the GPS reception signal and the sensor signal.

In step 402, the main control unit 310 initializes the accumulative rotation angle of the moving object to "0"; in step 404, input the GPS receiving signal received by the GPS receiving unit and the detection signal of the sensor unit 304; in step 406 In this method, while calculating the current position of the moving object through the input GPS reception signal and detection signal, the calculated current position of the moving object is compared with the previous position of the moving object, and the rotation angle for rotating the moving object is calculated. Calculation; in step 408, add the calculated rotation angle of the moving object to the accumulated rotation angle.

In step 410, the main control unit 310 judges whether the accumulated rotation angle is above a predetermined critical rotation angle. In step 410, when it is judged that the accumulated rotation angle is above the rotation critical angle, the main control unit 310 then in step 412, sets the accumulated rotation angle of the moving object as the rotation angle of the map data; in step 414 , after the map data is rotated according to the set rotation angle, it is output together with the calculated current position of the moving object to the display drive unit 312 and displayed on the display panel 314; in step 416, the accumulated rotation Angle is set to "0".

After step 410 judges that the accumulated rotation angle is not above the rotation critical angle, or the map data is rotated and displayed according to the accumulated rotation angle above the rotation critical angle and the accumulated rotation angle is initialized to "0", in step 418 Whether the moving object is traveling is judged. If the moving object is driving, return to step 404 and measure the rotation angle of the moving object; if the accumulated rotation angle reaches above the rotation critical angle, then rotate and display the map data. The above actions are repeatedly performed.

Moreover, when it is judged in step 418 that the moving object stops driving, the main control unit 310 ends the driving navigation operation on the moving object.

That is, assuming that the present invention, as shown in Figures 5a to 5c, in the travel route of the moving object, the result of measuring the position 502 of the moving object through the GPS reception signal and the sensor signal is to rotate slightly to the left and right and travel, then the moving object The left and right rotation angles of the object are measured and added, subtracted and accumulated on the accumulated rotation angles. Since the accumulated rotation angle is smaller than the preset rotation critical angle, the map data is displayed on the display panel as it is without rotation, and at the same time, the current position of the moving object is displayed.

Moreover, as shown in FIG. 6 a , when the moving object rotates to the right and travels from the current position ( P11 ) to the next position ( P12 ), the rotation angle of the moving object is added to the accumulated rotation angle. Since the accumulated rotation angle is smaller than the preset rotation critical angle, as shown in FIG. 6 b , the map data is displayed as it is without rotation, and at the same time, the traveling position of the moving object is displayed. And, when traveling from the position (P12) shown in Figure 6a to the next position (P13), then the rotation angle of the moving object traveling from the position (P12) to the next position (P13) is added to the accumulated rotation angle superior. For example, when the accumulated rotation angle is above the rotation critical angle, since it exceeds the range of ±60°, as shown in Figure 6c, the map data is rotated and displayed according to the accumulated critical angle, and the moving object is displayed at the same time driving path.

Through the above description, relevant workers can make various changes and modifications within the scope of not deviating from the technical idea of the present invention.

Therefore, the technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (4)

1. the method for displaying image that travels of navigational system comprises:

The 1st step, the rotation angle that moving object is travelled detects and adds up;

Whether the 2nd step is to judge on the rotation critical angle of setting in advance to the rotation angle that is added up in the 1st step;

The 3rd step thinks that the rotation angle that adds up is under the situation on the rotation critical angle, then is rotated demonstration to map datum judging through the 2nd step.

2. the method for displaying image that travels of navigational system as claimed in claim 1 is characterized in that,

When the rotation angle that is added up in the 2nd step not under the situation on the critical rotation angle of setting in advance, carry out the 1st step that above-mentioned rotation angle is detected and adds up repeatedly.

3. the method for displaying image that travels of navigational system as claimed in claim 1 is characterized in that, further comprises:

The 4th step, in the 3rd step, map datum is rotated demonstration after, the rotation angle that is added up is carried out initialization.

4. the method for displaying image that travels of navigational system comprises:

First step travels the initial stage in moving object, and the rotation critical angle of map datum is set and the rotation angle that adds up is carried out initialization;

Second step detects and measured rotation angle is accumulated on the rotation angle that adds up the rotation angle of moving object;

Whether third step is to judge on the rotation critical angle that sets to the rotation angle that adds up of second step;

The 4th step is thought and adds up rotation angle under the situation on the rotation critical angle judging through third step, carries out repeatedly then that rotation angle to the moving object of second step detects and measured rotation angle is accumulated in action on the rotation angle that adds up;

The 5th step, the rotation angle that adds up in third step is under the situation on the rotation critical angle, then carry out following action repeatedly: according to the rotation critical angle map datum is rotated show and the rotation angle that adds up carried out initialization after, the rotation angle of the moving object of second step is detected and measured rotation angle is accumulated on the rotation angle that adds up.

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