Sound Wave Sensor Detection Sensitivity Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Detection devices with wider detection ranges using sound wave sensors face challenges in distinguishing between relevant and irrelevant measurement targets, leading to potential incorrect operation state control of electronic apparatuses.
Innovation Solution
A detection device with a sound wave sensor that adjusts detection sensitivity between different ranges, using thresholds to differentiate between moving and stationary targets, and prioritizing targets within closer detection ranges for operation state control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the detection range of the sound wave sensor is widened to detect measurement targets earlier, then the operation state control can be performed at an earlier stage, but the number of detected measurement targets increases including irrelevant targets
Solution Approach 1:
The detection range is divided into multiple zones (first detection range closer to the apparatus, second detection range farther away). Different detection sensitivities are applied to each zone, allowing early detection in the second range while maintaining precision in the first range where relevant targets are more likely to be located.
Solution Approach 2:
Different detection sensitivities are assigned to different spatial regions. The first detection range (closer to the apparatus) uses higher sensitivity to avoid false detection of distant irrelevant targets, while the second detection range (farther away) uses lower sensitivity for early detection. This local differentiation resolves the contradiction between early detection and detection accuracy.
2Reliability
If the detection sensitivity is increased to detect all measurement targets, then the detection range coverage is improved, but false detection of irrelevant targets increases
Solution Approach 1:
The detection sensitivity is not uniformly increased across the entire detection range. Instead, higher sensitivity is applied only to the first detection range where relevant targets are expected, while the second detection range maintains lower sensitivity. This localized sensitivity adjustment ensures reliable detection coverage without causing false detection of irrelevant distant targets.
Solution Approach 2:
The detection system segments the detection range into multiple zones with different sensitivity levels. This segmentation allows the system to achieve high detection coverage in the critical near zone while maintaining lower sensitivity in the distant zone, thereby preventing false detection and resolving the contradiction between coverage and accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively reduces false detection of irrelevant targets, ensuring accurate operation state control of electronic apparatuses by focusing on dynamic targets within closer detection ranges.
Implementation Method 1
a sound wave sensor that detects a distance to a measurement target
Data Source
AI summary
A detection device includes: a sound wave sensor that detects a distance to a measurement target; and a processor configured to: in response to the measurement target being detected in a first detection range that is part of a detection range in which the distance to the measurement target is detectable by the sound wave sensor, change setting to cause a detection sensitivity for a second detection range in the detection range of the sound wave sensor to be a second detection sensitivity lower than a first detection sensitivity set before the setting is changed, the second detection range being outward of the first detection range when viewed from the detection device.