Detection Device Interference Filtering for Accurate Echo Imaging
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Solution Overview
Problem
Conventional devices for transmitting and receiving sound and/or electromagnetic waves, such as radar apparatuses and fish finders, often incorrectly identify normal echo signals as interference due to large intensity differences between successive measurements, leading to incomplete or distorted echo images.
Innovation Solution
A detection device with a transceiving module, memory module, and interference detecting module that determines interference only when the intensity difference between reception signals is continuously above a predetermined threshold for a reference time period, preventing erroneous interference detection and allowing for accurate echo image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference detection is performed based on large intensity difference between reception signals, then interference removal is achieved, but normal echo signals are erroneously determined as interference
Solution Approach 1:
The patent segments the detection process into multiple stages: first detecting interference based on intensity difference threshold, then verifying the detection result by checking depth position continuity. This segmentation allows the system to distinguish between true interference and false positives by requiring consistent depth positioning across multiple measurements.
Solution Approach 2:
The patent implements feedback by using the depth position information from the first measurement as a reference for the second measurement. The system compares whether the depth position of the reception signal remains within a predetermined range across measurements, and uses this feedback to confirm or reject interference determination, thereby preventing erroneous removal of valid echo signals.
2Productivity
If interference detection uses simple intensity ratio comparison, then processing speed is improved, but detection precision deteriorates due to inability to distinguish continuous interference patterns
Solution Approach 1:
The patent performs preliminary action by first determining whether the reception signal should be treated as interference based on intensity difference, then subsequently verifying this determination by checking depth position continuity. This two-step preliminary verification process maintains processing efficiency while significantly improving detection precision by filtering out false positives.
Solution Approach 2:
The patent introduces dynamic verification by checking whether the depth position of the reception signal remains within a predetermined range across multiple measurements. This dynamic check adapts the detection criteria based on the temporal continuity of the signal characteristics, allowing the system to distinguish between transient intensity variations and continuous interference patterns.
Data Source
AI summary
This disclosure provides a detection device, which includes a transceiving module for transmitting a transmission signal and receiving an echo caused by the transmission signal to output a reception signal according to an intensity of the echo, a memory module for storing the reception signals for a plurality of measurements, and an interference detecting module for detecting an interference signal from the reception signals, the interference detecting module determining that the reception signal contains the interference signal when the reception signal has an intensity difference with the previous reception signal by more than a predetermined threshold for over a reference time period in one measurement.