Cleaning robot and material identification method thereof
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Solution Overview
Problem
Existing cleaning robots face inaccuracies in determining the material of the moving plane due to limitations in ultrasonic and infrared detection methods, leading to false judgments and unsuitable operational modes.
Innovation Solution
A cleaning robot equipped with a storage module, ultrasonic module, and processing module, utilizing a threshold comparison table to accumulate and analyze ultrasonic energy information over a predetermined period to accurately identify the material and adjust horsepower and suction accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ultrasonic waves are used to judge the material of the moving plane, then the cleaning robot can detect different floor materials, but the detection accuracy is insufficient leading to false judgments
Solution Approach 1:
The patent applies preliminary action by pre-establishing a threshold comparison table with multiple comparison thresholds corresponding to different floor materials before actual detection. The processing module accumulates ultrasonic energy information and compares it against these pre-set thresholds to determine floor material, avoiding real-time complex calculations and improving both detection accuracy and judgment reliability.
Solution Approach 2:
The patent implements feedback by using the accumulated ultrasonic energy information to continuously compare with threshold values and adjust the determination of floor material. The system accumulates energy information over time and uses this feedback loop to improve detection accuracy, reducing false judgments compared to single-point detection methods.
2Adaptability or versatility
If displacement wheels are used to detect slip amount or running resistance for determining floor material, then the cleaning robot can change moving and cleaning modes, but false judgments occur when wheels are stuck
Solution Approach 1:
The patent replaces the mechanical detection system (displacement wheels detecting slip or resistance) with an ultrasonic detection system. The ultrasonic module emits ultrasonic waves and measures the reflected energy, which is then accumulated and compared against thresholds. This substitution eliminates the problem of wheel sticking causing false judgments while maintaining the ability to adapt different cleaning modes based on detected floor material.
3Measurement precision
If infrared rays are used to detect floor material, then the cleaning robot can identify different surfaces, but detection fails or erroneously judges due to ambient light intensity and blind spots
Solution Approach 1:
The patent replaces the infrared detection system with an ultrasonic detection system. Ultrasonic waves are sound waves with frequencies above human hearing range, which are not affected by ambient light conditions. The ultrasonic module emits ultrasonic waves and measures the reflected energy from different floor materials, eliminating the harmful effects of ambient light interference and blind spots associated with infrared detection.
Solution Approach 2:
The patent changes the detection parameter from optical (infrared) to acoustic (ultrasonic). By using ultrasonic frequency waves instead of infrared light, the system avoids the sensitivity to ambient light intensity and blind spot issues. The processing module accumulates ultrasonic energy information and compares it with pre-set thresholds to accurately identify floor materials regardless of lighting conditions.
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
Improves the accuracy of material identification, reduces false judgments, and optimizes operational efficiency by effectively controlling speed and cleaning force based on the detected material.
Implementation Method 1
the ultrasonic module emits the ultrasonic signal to the moving plane contacted by the moving unit, and the ultrasonic module receives the ultrasonic reflection signal from the moving plane that reflects the ultrasonic signal
Data Source
AI summary
The invention relates to a cleaning robot and a material identification method thereof, which is suitable for cleaning robots. The cleaning robot is pre-set with a threshold comparison table and comprises a plurality of comparison thresholds, wherein each comparison threshold defines an interval of accumulated energy information accumulated by the moving plane of different materials within a predetermined period of time. The cleaning robot generates accumulated energy information during the movement, so that the cleaning robot can find the comparison threshold corresponding to the accumulated energy information from the threshold comparison table, and then determines the material of the moving plane contacted by the cleaning robot.