Ultrasonic Echo Signal Compression for Limited Vehicle Bus Bandwidth
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Solution Overview
Problem
The increasing demand for data transmission from ultrasonic systems in vehicles to data processing devices exceeds the limited bandwidth capacity of existing vehicle data buses, necessitating a method to enhance data compression without compromising obstacle recognition reliability.
Innovation Solution
A method for transmitting data via a vehicle data bus that involves extracting predetermined signal profile characteristics from echo signals, identifying and classifying them into predefined classes, and transmitting identifiers and object parameters to reconstruct the echo signal sections, thereby reducing the data to be transmitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the quantity of data transmitted from the ultrasonic system to the data processing device is increased to improve obstacle recognition reliability, then the information content and relevance for obstacle recognition is improved, but the data bus load increases beyond the limited bandwidth capacity
Solution Approach 1:
The patent extracts only the essential signal profile characteristics from the complete echo signal for transmission. Instead of transmitting the entire high-volume echo signal data, the system identifies and transmits only the relevant characteristic parameters that are sufficient for reliable obstacle recognition, thereby reducing data quantity while maintaining recognition reliability
Solution Approach 2:
The patent segments the echo signal into distinct signal profile objects and transmits only the essential characteristics of each segment. By dividing the continuous echo signal into discrete identifiable profiles and transmitting only their key parameters, the system reduces overall data transmission volume while preserving the information needed for reliable obstacle detection
2Quantity of substance
If data compression is applied to reduce the data transmission quantity, then the data bus load is reduced, but the information content may be lost compromising obstacle recognition
Solution Approach 1:
The patent changes the representation parameters of the echo signal by transmitting condensed signal profile characteristics instead of the complete raw signal. By identifying and transmitting only the essential parameters that define each signal profile object, the system achieves data compression while preserving the critical information content needed for accurate obstacle recognition
Solution Approach 2:
The patent creates a simplified copy of the echo signal in the form of signal profile characteristics. Instead of transmitting the complete original signal, the system transmits a condensed representation that captures the essential features, thereby reducing data transmission quantity while maintaining sufficient information content for obstacle recognition
3Loss of information
If the data transmission rate is increased to provide more data for sensor fusion and environment mapping, then the information content for surroundings maps is improved, but the available sensor data bus bandwidth is exceeded
Solution Approach 1:
The patent extracts only the essential signal profile characteristics from the echo signal for transmission to the data processing device. By identifying and transmitting only the relevant characteristic parameters that are sufficient for reliable obstacle recognition, the system reduces data quantity while maintaining recognition reliability
Solution Approach 2:
The patent segments the echo signal into distinct signal profile objects and transmits only the essential characteristics of each segment. By dividing the continuous echo signal into discrete identifiable profiles and transmitting only their key parameters, the system reduces overall data transmission volume while preserving the information needed for reliable obstacle detection
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 approach minimizes data bus load, ensures reliable obstacle recognition, and provides free data bus capacity for control commands and status information, enhancing the efficiency of data transmission.
Implementation Method 1
ultrasonic burst signals are emitted by at least one ultrasonic transmitter which are received by at least one ultrasonic receiver of the ultrasonic system after having been reflected from an obstacle
Data Source
AI summary
A method for transmitting data from an ultrasonic sensor to a computer system includes forming a feature vector signal from an electric reception signal; recognizing signal objects in the reception signal and classifying the signal objects according to predetermined signal object classes. The signal objects are forms or sequences of forms. At least one object parameter allocated to the signal object and one symbol for the signal object class are allocated to each signal object, or for each signal object, at least one signal object parameter and a symbol object are determined. The method further includes determining a chirp value as an allocated signal object parameter. The method further includes transmitting the symbol and the at least one signal object parameter to the computer system as data of a recognized signal object, wherein the at least one signal object parameter includes a signal object parameter indicating the chirp value.