underwater detection device

JP7883759B2Active Publication Date: 2026-07-02HONDA ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
HONDA ELECTRONICS CO LTD
Filing Date
2022-09-28
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing underwater detection devices face interference issues from other nearby devices, leading to the potential loss of detection target responses, especially with the use of chirp waves that enhance detection resolution, causing some object responses to be discarded.

Method used

An underwater detection device that compares reflection intensities from the same depth in consecutive detections to identify interference, correcting the intensities based on predetermined thresholds and ranges, using a transducer to transmit and receive ultrasonic waves, and forming display lines representing reflection intensities chronologically.

Benefits of technology

The device accurately distinguishes and corrects interference, ensuring clear display of detected objects by maintaining detection resolution and preventing the loss of object responses.

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Abstract

To provide an underwater detection device that can delete a display based on interference, while displaying a detection object clearly.SOLUTION: Let reflection intensity R1[i] from one depth stored in a judgement object reception signal 23b obtained in one detection be judgement object intensity, and reflection intensity R0[i] from the same depth as the one depth stored in a previous detection reception signal 23a obtained in detection right before the one detection be first comparison object intensity, and reflection intensity R2[i] from the same depth as the one depth stored in a right-after detection reception signal 23c in a reception signal obtained in detection after the one detection be second comparison object intensity, when the depth in which the judgement object intensity is more intense in both the first comparison object intensity and the second comparison object intensity than a prescribed amount of intensity (intensity reference value 22b (RTH)) exists continuously for at least a prescribed length (continuous length threshold 22c (CTH)) (S17:Yes), it is judged that a reflection wave received in these depths is considered to be based on interference with a different ultrasound wave.SELECTED DRAWING: Figure 3
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