Vehicle Sensor Cleaning Compressor Noise Cancellation Control
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Solution Overview
Problem
Existing sensor assembly cleaning systems for vehicles, particularly autonomous vehicles, face challenges in effectively cleaning sensors while minimizing noise generation from the cleaning process, and in optimizing compressor operation based on vehicle speed and other parameters.
Innovation Solution
The system comprises a compressor that generates fluid for cleaning sensors, with a computing system that determines acoustic emissions from the compressor and counteracts them using noise cancellation mechanisms. The operation of the compressor is adjusted based on vehicle speed, predicted speed, and other parameters to optimize cleaning and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the compressor operates at high power to clean sensors effectively, then cleaning performance is improved, but noise generation increases
Solution Approach 1:
The system applies preliminary anti-action by generating anti-noise sound waves before the compressor noise fully develops. The acoustic emission sensor detects compressor noise in real-time, and the speaker emits counter-phase sound waves that cancel the harmful noise, allowing the compressor to operate at full power for effective sensor cleaning without propagating harmful noise into the passenger compartment.
2Object-generated harmful factors
If noise cancellation mechanisms are added to reduce compressor noise, then noise is reduced, but device complexity increases
Solution Approach 1:
The system uses an intermediary approach by introducing acoustic emission sensor and speaker as mediating components between the compressor and the passenger compartment. These components don't modify the compressor itself but intervene in the noise propagation path, detecting compressor noise and emitting counter-noise to cancel harmful sounds while maintaining system modularity.
3Loss of energy
If the compressor operation is continuously adjusted based on vehicle speed and other parameters, then energy efficiency is improved, but control system complexity increases
Solution Approach 1:
The system applies dynamics by making the compressor operation adaptive and variable based on real-time vehicle conditions. The controller adjusts compressor power output dynamically according to vehicle speed, sensor dirtiness level, and acoustic emission measurements, optimizing energy efficiency while maintaining cleaning effectiveness under varying operational conditions.
Solution Approach 2:
The system implements feedback control by continuously monitoring acoustic emissions from the compressor and vehicle operating parameters, then using this information to adjust compressor operation. The acoustic emission sensor provides real-time feedback on compressor noise levels, and the controller uses this feedback alongside vehicle speed and sensor condition data to optimize compressor power consumption while maintaining effective cleaning.
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
The system effectively cleans vehicle sensors while significantly reducing noise from the cleaning process, and optimizes compressor operation to improve efficiency and performance based on dynamic vehicle conditions.
Implementation Method 1
determining information of an acoustic emission from the compressor
Implementation Method 2
a microphone disposed within a threshold distance of the compressor and configured to capture the acoustic emission from the compressor
Implementation Method 3
counteracting the acoustic emission based on the determined information
Data Source
AI summary
An apparatus on a vehicle comprises one or more sensors, one or more nozzles that output fluid to clean the respective one or more sensors, and a compressor that generates fluid such as compressed air. The compressor is in fluid communication with the one or more nozzles. The apparatus further comprises one or more processors, and a memory storing instructions that, when executed by the one or more processors, cause the system to determine information of an acoustic emission from the compressor and to counteract the acoustic emission based on the determined information.