Receiver Controller for Automotive Sensor Voltage Stabilization
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Solution Overview
Problem
In automotive systems, the long wires required to connect sensors to the ECU increase costs and weight, and existing methods for transmitting data from sensors to the ECU are complex and power-intensive due to the need for multiple wires and current measurement.
Innovation Solution
A receiver system that uses a controller and driver stage to maintain a stable supply voltage by compensating for changes in current consumption of the transmitter, allowing message reception through modulation of current consumption without direct current measurement, reducing the need for multiple wires and simplifying the controller design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple wires are used to connect sensor to ECU for data transmission, then data transmission reliability is improved, but system complexity and cost increase
Solution Approach 1:
The patent combines power supply and data transmission functions into a single wire connection. The transmitter modulates the current consumption of the sensor, allowing data to be transmitted through the same wire that supplies power, thereby eliminating the need for separate data transmission wires and reducing overall system complexity.
Solution Approach 2:
The single wire connection serves multiple functions: it provides power supply to the sensor and simultaneously transmits data from the sensor to the ECU. This multi-functional approach reduces the number of wires needed while maintaining reliable data transmission.
2Measurement precision
If current measurement is implemented to receive modulated signals, then data reception accuracy is improved, but power consumption and device complexity increase
Solution Approach 1:
The receiver uses a feedback mechanism where the controller adjusts the supply voltage to the transmitter based on the modulated current consumption. By monitoring the voltage changes caused by current modulation and providing compensating control signals, the system achieves accurate data reception without requiring separate current measurement circuitry.
Solution Approach 2:
The system uses the existing supply voltage and current pathways to carry out both power delivery and data reception functions. The voltage fluctuations naturally occurring due to modulated current consumption are directly utilized for data detection, eliminating the need for additional measurement components and reducing power consumption.
3Reliability
If supply voltage is kept constant to ensure stable operation, then device reliability is improved, but ability to receive modulated current signals deteriorates
Solution Approach 1:
The system dynamically adjusts the supply voltage to the transmitter based on the modulated current consumption requirements. Rather than maintaining a fixed voltage, the controller continuously adapts the voltage level to compensate for current changes, enabling both stable operation and accurate detection of modulated signals.
Solution Approach 2:
The invention changes the voltage parameter dynamically in response to current modulation. By adjusting the supply voltage as a variable parameter rather than a fixed value, the system maintains stable transistor operation while simultaneously enabling the detection of data encoded through current consumption modulation.
Data Source
AI summary
A receiver for receiving messages from a transmitter includes a controller and a driver stage for providing a supply voltage to the transmitter based on a control signal. The controller is configured to provide the control signal to compensate for changes of the supply voltage caused by a modulation of the current consumption of the transmitter, such that the supply voltage remains in a predefined range. Furthermore, the controller is configured to evaluate a series of succeeding values of the control signal to derive a message generated by the transmitter by modulating its current consumption.