Error Transmission in Rotational Speed Sensor Pulse Signals
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Solution Overview
Problem
Existing methods for transmitting error information in pulse signals from sensors, such as wheel speed sensors, are computationally intensive and require time to recognize incorrect measured values, which can delay reaction and compromise safety, especially in vehicle applications.
Innovation Solution
The method involves transmitting error information using pulses of different heights within the frequency-modulated signal, where pulses with a second height indicate errors, allowing the receiver to quickly identify and react to errors, and potentially initiate an error description protocol without interrupting data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If error detection is performed using computationally intensive algorithms in the evaluation device, then measurement accuracy is improved, but reaction time increases and safety is compromised
Solution Approach 1:
The sensor performs preliminary error detection and generates error indicators before the evaluation device processes the measurement data. This preliminary action allows the evaluation device to receive both measurement values and error indicators simultaneously, enabling faster reaction without compromising detection accuracy.
Solution Approach 2:
The error detection function is segmented from the main evaluation device and integrated into the sensor itself. The sensor independently detects errors and generates error indicators, separating this computationally intensive task from the evaluation device's data processing workflow.
2Reliability
If the sensor transmits additional error information alongside measured values, then safety and reliability are improved, but signal complexity increases
Solution Approach 1:
Error indicators are transmitted using a localized and distinct pulse height level that differs from measurement value pulses. This local differentiation in signal quality allows the receiver to easily distinguish error information from measurement data without requiring complex signal processing.
Solution Approach 2:
The patent uses pulse height level changes as an analog to color changes, where different pulse heights represent different information types. Measurement values use one pulse height level while error indicators use a different pulse height level, enabling intuitive differentiation similar to how different colors convey different meanings.
3Productivity
If the receiver must distinguish between measurement pulses and error indicator pulses in a frequency-modulated signal, then data transmission efficiency is maintained, but error detection reliability decreases
Solution Approach 1:
Measurement value pulses and error indicator pulses are made asymmetric by using different pulse height levels. This asymmetry breaks the symmetry of the frequency-modulated signal, allowing the receiver to easily distinguish between measurement data and error indicators based on pulse height rather than requiring complex frequency analysis.
Solution Approach 2:
The patent adds pulse height level as an additional dimension to differentiate information types. Instead of relying solely on frequency modulation for data transmission, the system uses pulse height level as a separate dimension to encode error indicators, enabling the receiver to distinguish information types without compromising transmission efficiency.
Data Source
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AI summary
The invention relates to a method for transmitting error information in a pulse signal (40), said signal being designed to transmit measured values (12) from a sensor (10) that are frequency modulated with pulses (42) having a first magnitude (50) to a receiver (18). The method comprises: recognition of an error (53) in the sensor (10); and introduction of a pulse (52) having a second magnitude (56) which is different from the first magnitude (50) into the pulse signal (40), in order to indicate the recognized error (53) in said pulse signal (40).