JPH0250693U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an example of a position display radar device according to this invention, Fig. 2 is a diagram showing the relationship between the position of a moving object on XY coordinates and latitude and longitude, and Fig. 3
The figure shows an example of a display image displayed by the apparatus according to this invention, and FIG. 4 is a block diagram showing another example of obtaining error information in the apparatus according to this invention. 11: Radar transmitting/receiving device, 13: Coordinate converter, 14: Echo information storage unit, 15: Navigation device, 1
6: Position information storage circuit, 17: Gyro, 18:
Direction information storage circuit, 19: Latitude and longitude interval setting section,
21: Chart information calculation unit, 22: Parameter calculation unit, 27: Line information calculation unit, 28: Chart information storage unit,
29: Display device, 31: Synthesis circuit, 42: Correction control unit, 43: Error information storage unit, 41: Image of object with known latitude and longitude position, 44: Movement marker, 45
: moving marker generation section, 46: error information calculation section.

Claims (1)

[Claims for Utility Model Registration] A radar device section for obtaining echo information based on echoes detected from targets around a moving body, and a position in latitude and longitude based on the position obtained by measuring the position of the moving body. a navigation device section for obtaining information; a direction detection device section for detecting the direction of the mobile object and obtaining direction information; and a nautical chart information storage for storing figures related to the nautical chart near the position of the mobile object as chart information. and a raster type display unit having a display screen for displaying an image based on the echo information (hereinafter referred to as an echo image), and a raster type display unit having a display screen for displaying an image based on the nautical chart information (hereinafter referred to as a nautical chart image) on the display screen. ) and the echo image in a superimposed manner, and is capable of correcting a display position shift between the echo image and the nautical chart image based on the position information, comprising: a. nautical chart information forming means for forming and displaying the latitude and longitude lines; b. interval setting means for obtaining interval information for calculating intervals for displaying the latitude and longitude lines; c. the position information, the direction information, and the d) nautical chart information storage means for storing, as the nautical chart information, information obtained by calculating display intervals and inclination angles of the latitude and longitude lines to be displayed on the display screen based on the interval information; d. error calculating means for calculating the amount of movement of the latitude and longitude lines required to move the display position of the latitude and longitude lines to the correct position and perform the correction with respect to a target whose latitude and longitude positions are known as a latitude and longitude error; , e error information storage means for storing errors in the latitude and longitude as error information, and f correction for performing calculations to obtain the nautical chart information in which the display positions of the latitude and longitude lines are subsequently corrected based on the error information. A position display radar device, comprising: arithmetic means;