JPH06258416A - Device for measuring position of mobile body - Google Patents

Abstract

PURPOSE:To provide a device for measuring a position of mobile body by which the present position of vehicle or vessel, etc., moving in a specific course can be accurately measured by a comparatively simple construction. CONSTITUTION:The title device is provided with a position detector 12 such as a GPS, etc., and a traveling velocity vector detector consisting of an azimuth detector such as a magnetic compass, etc., and a velocity absolute value detector 15 such as a rotary encoder, etc., on a mobile body 11, and it is constructed so as to calculate the current position of the body 11 by an operation means CPU 16 in according to the position information and velocity vector outputted from the respective devices.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position measuring device for measuring the current position of a moving body with high accuracy.

[0002]

2. Description of the Related Art For example, when a moving body such as an automobile or a ship moves on a specific course, a method of easily measuring the current position and traveling direction of the moving body is known as a method using radio waves. Although LORAN, OMEGA and the like have been put to practical use, all of them require reference stations at a plurality of points on the moving body, and they are large and complicated, so that they are disclosed in, for example, JP-A-56-11063. The current position of the moving body has been obtained by using only a position detecting device for the moving body such as GPS or Global Positioning Syotem (GPS as satellite navigation) or by integrating the velocity vector over time.

[0003]

However, the conventional position detecting device of this type generally has a low position detecting accuracy, and the method of integrating the velocity vector with time has a long time due to error accumulation. However, there was a problem that the position could not be measured.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a means having a relatively simple structure and capable of measuring the current position of a moving body with high accuracy.

[0005]

Therefore, in the present invention, a position measuring device for a moving body of this type is provided with a position detecting means arranged on the moving body, a moving speed vector detecting means, and a moving speed vector detecting means. The moving speed vector detecting means is configured to have a calculating means for calculating the current position from output position information and speed vector information from each detecting means, and further, the moving speed vector detecting means is a traveling azimuth measuring means and an absolute speed value measurement. It is intended to achieve the above-mentioned object by being configured so as to include means.

[0006]

With the apparatus configuration of the present invention as described above, the position of the target moving body at each time point can be obtained with good accuracy, and the measurement error does not accumulate.

[0007]

EXAMPLES The present invention will be described below based on examples. FIG. 1 shows a schematic block diagram of an embodiment of this type of present position measuring apparatus according to the present invention. In FIG. 1, the outer shape of the target moving body 11 is shown as an automobile.

(Structure) In FIG. 1, 12 is an automobile 1.
The position detecting device such as the GPS mounted on the device 1, 13 is its antenna, 14 is an azimuth detecting device such as a magnetic compass, 15 is a moving speed absolute value detecting device such as a rotary encoder, and 16 is a CPU as a computing device. is there. Here, the azimuth / speed detecting device 14/15 functions as a moving speed vector measuring device, and includes respective signal processing circuits, an interface circuit of the CPU 16, and the like.

[0009]

[Equation 1]

[0010]

As described above, according to the present invention,
Since the position measuring device of the moving body is configured to calculate the current position from the position detecting means, the velocity vector detecting means, and the output information from these, the current position of the moving body can be measured with high accuracy with a relatively simple structure. obtain.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an embodiment.

[Figure 2] CPU operation block diagram

FIG. 3 is an output spectrum diagram by x.

FIG. 4 is an output spectrum diagram by v.

[Explanation of symbols]

11 Moving Object (Automobile) 12 Position Detecting Device (GPS) 14 Direction Detecting Device (Magnetic Compass) (Moving Speed Vector Detecting Device) 15 Absolute Speed Value Detecting Device (Rotary Encoder) (Moving Speed Vector Detecting Device) 16 Computing Device (CPU )

Claims (2)

[Claims] 1. A position detecting means arranged on a moving body, a moving speed vector detecting means thereof, and a calculating means for calculating a current position from output position information and speed vector information from these detecting means. A position measuring device for a mobile body, comprising: 2. The position measuring device for a moving body according to claim 1, wherein the moving velocity vector detecting means comprises a traveling direction measuring means and an absolute velocity value measuring means.