Ultrasonic Object Sensing with Temperature-Based Indirect Wave Suppression
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Solution Overview
Problem
Ultrasonic sensors in moving objects often falsely detect objects due to significant temperature changes in isolated or heated environments, leading to unreliable driving safety controls.
Innovation Solution
An object sensing apparatus with ultrasonic sensors that employs a temperature change detection unit to suppress false sensing by limiting the use of indirect waves when temperature changes exceed a predetermined threshold, ensuring accurate object detection using direct waves only.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If ultrasonic sensors use indirect waves for object sensing, then sensing coverage is improved, but false sensing increases under temperature change conditions
Solution Approach 1:
The system dynamically changes the sensing parameters by switching between direct wave sensing and indirect wave sensing based on temperature conditions. When temperature change is detected, the system changes the parameter to use only direct waves, thereby avoiding false sensing while maintaining sensing coverage under normal conditions
Solution Approach 2:
The sensing method transitions from a static approach to a dynamic one by continuously monitoring temperature changes and adjusting the wave type selection accordingly. The system adaptively switches between using indirect waves (for extended coverage) and direct waves only (for reliability during temperature changes)
2Adaptability or versatility
If ultrasonic sensors operate in isolated or heated environments, then mobility and adaptability are improved, but false sensing occurs due to temperature changes
Solution Approach 1:
The system implements a feedback mechanism where temperature sensors continuously monitor environmental conditions and provide feedback to the control unit. Based on this feedback, the system automatically adjusts the sensing mode to prevent false sensing, thereby maintaining reliability while operating in diverse environments
Solution Approach 2:
Temperature sensors act as intermediary devices that detect environmental changes and trigger appropriate sensing mode transitions. This intermediary mechanism enables the system to adapt to isolated or heated environments while preventing false sensing through automated mode switching
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
This configuration effectively reduces false object sensing by limiting the use of indirect waves during temperature changes, maintaining reliable object detection and preventing unnecessary safety control activations.
Implementation Method 1
a plurality of ultrasonic sensors 20 to transmit a probing wave and to receive a reflected wave of the probing wave
Implementation Method 2
receive a reflected wave of the probing wave
Implementation Method 3
a temperature change detection unit which detects a predetermined temperature change state where temperature change of a predetermined value or more has occurred
Data Source
AI summary
An object sensing apparatus includes an object sensing unit to sense an object using a direct wave, being a reflected wave received by a sensor having transmitted a probing wave among a plurality of ultrasonic sensors, and an indirect wave, being a reflected wave received by a sensor different from the sensor having transmitted the probing wave among the ultrasonic sensors, and a temperature change detection unit to detect a predetermined temperature change state where temperature change of a predetermined value or more has occurred or a possibility of the temperature change occurs in an ambient temperature of the moving object. When the predetermined temperature change state is detected by the temperature change detection unit, the object sensing unit performs sensing suppression control not to sense the object using the indirect wave or to make it difficult to sense the object using the indirect wave.