Sensor With Integrated Identification Device for Automotive Fail-Safety
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Solution Overview
Problem
In the automotive sector, existing sensors, such as wheel speed sensors, face challenges in fail-safety and trackability, requiring improved monitoring and evaluation for reliability.
Innovation Solution
A sensor with a data memory unit for univocal identification, a data transmission interface for wireless communication, and an integrated signal processing unit, including a voltage or current source, allows for unique self-identification and type identification data transmission to an external device, enabling reliable monitoring and evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a data memory unit with unique identification is integrated into the sensor, then trackability and reliability monitoring are improved, but device complexity increases
Solution Approach 1:
The identification device is integrated directly into the sensor chip, merging the identification function with the sensing function. This integration approach adds identification capability while minimizing the increase in overall device complexity by sharing the same physical substrate and packaging.
Solution Approach 2:
The sensor is designed to serve multiple functions: sensing physical quantities, storing identification data, and transmitting data wirelessly. This multi-functionality approach allows a single device to provide both sensing and identification services, improving reliability monitoring without requiring separate dedicated identification devices.
2Loss of information
If a data transmission interface with wireless capability is added, then data communication and monitoring are improved, but use of energy increases
Solution Approach 1:
The wireless data transmission operates periodically rather than continuously, allowing the sensor to transmit identification and sensing data at scheduled intervals. This periodic operation mode reduces average power consumption while maintaining adequate data communication capability for monitoring purposes.
Solution Approach 2:
The sensor performs self-identification and automatically transmits its own identification data and sensing measurements without requiring external intervention. This self-service capability reduces the need for additional control signaling and simplifies the communication protocol, thereby reducing energy consumption.
3Adaptability or versatility
If multiple current sources are integrated for multi-level output signals, then signal processing capability is improved, but device complexity increases
Solution Approach 1:
Multiple current sources are integrated into a single signal processing circuit block on the sensor chip, merging multiple signal generation functions into one unified circuit structure. This integration approach provides multi-level output capability while minimizing the increase in overall device complexity through shared circuitry and common packaging.
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 solution enhances sensor reliability and monitoring by providing a unique identification system, ensuring accurate data transmission and storage, thus improving fail-safety and trackability in automotive applications.
Implementation Method 1
The at least one sensor element of the sensor is preferably in the form of a magnetic field sensor element, particularly in the form of a Hall element
Implementation Method 2
magnetoresistive sensor element, such as an AMR sensor element or a GMR sensor element
Data Source
AI summary
A sensor including at least one sensor element, at least one signal processing circuit, and at least one housing inside which the sensor element and the signal processing circuit are arranged. The sensor further includes an electronic identification device.