Position measuring device and position measuring method

The position measuring device calculates the position of a moving object by identifying transmission frequency and using Doppler effect principles, addressing the challenge of measuring moving objects without emitting radio waves, thus providing accurate position determination.

JP7882689B2Active Publication Date: 2026-06-30KK TOSHIBA
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
KK TOSHIBA
Filing Date
2022-05-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing position measurement systems face challenges in accurately determining the position of a moving object without emitting radio waves, particularly when synchronizing multiple radio wave direction measuring devices and handling errors in position information.

Method used

A position measuring device comprising a receiving antenna unit, arrival direction estimation, detection unit, specification unit, and position calculation unit, which identifies the transmission frequency of a moving object's radio waves and calculates its position using arrival direction and observation frequency without emitting radio waves.

Benefits of technology

Enables accurate measurement of a moving object's position using a single device by identifying transmission frequency and applying Doppler effect principles, allowing position calculation without radiating radio waves.

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Abstract

To provide a position measuring device capable of measuring a position of a moving body without emitting a radio wave to the moving body.SOLUTION: A position measuring device includes a receiving antenna section, an arrival direction estimation section, a detection section, an identification section, and a position calculation section. The receiving antenna section receives a radio wave emitted by an object moving body and generates a reception signal. The arrival direction estimation section estimates an arrival direction of the radio wave on the basis of the reception signal. The detection section detects an observation frequency which is a frequency of the radio wave received by the receiving antenna section on the basis of the reception signal. The identification section identifies a transmission frequency which is a frequency of the radio wave emitted by the object moving body on the basis of the reception signal. The position calculation section calculates a position of the object moving body on the basis of a result of estimating the arrival direction, a result of detecting the observation frequency, and the transmission frequency.SELECTED DRAWING: Figure 1
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