Drive-Sense Circuit Integration for Single-Line Sensor Interfacing
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Solution Overview
Problem
Current data communication systems face challenges in efficiently processing and interpreting signals from a variety of sensors across different applications, including industrial, healthcare, and transportation sectors, due to the complexity of sensor characteristics and the need for simultaneous driving and sensing functions.
Innovation Solution
The implementation of drive-sense circuits that can simultaneously drive and sense signals via a single line, using power signals with DC and AC components to interact with sensors and actuators, enabling efficient data processing and communication across computing devices and networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate drive and sense circuits are used for sensors, then sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines drive and sense circuits into a single integrated circuit that can simultaneously perform both functions. The circuit includes a drive terminal for providing drive signals and a sense terminal for receiving sense signals, with internal switching mechanisms that allow the same circuit to operate in both drive and sense modes, thereby reducing device complexity while maintaining sensing accuracy.
Solution Approach 2:
The patent implements dynamic switching within the integrated circuit to alternate between drive and sense operations. The circuit uses time-division multiplexing and dynamic control signals to switch between providing drive signals to actuators and receiving sense signals from sensors, enabling a single circuit to adaptively perform multiple functions based on operational requirements.
2Object-affected harmful factors
If multiple separate lines are used for driving and sensing, then signal interference is reduced, but power requirements increase
Solution Approach 1:
The patent merges drive and sense functions into a single integrated circuit with shared signal paths. The circuit uses internal switching and isolation mechanisms to prevent interference between drive and sense signals while operating on a single power supply line, thereby reducing power requirements without sacrificing signal integrity.
Solution Approach 2:
The patent introduces intermediary switching elements and isolation circuits within the integrated circuit that act as mediators between drive and sense functions. These intermediaries prevent signal interference by selectively connecting or disconnecting signal paths, allowing the circuit to operate both drive and sense functions through a single line without cross-interference.
3Productivity
If concurrent drive and sense operations are enabled, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic time-division multiplexing within the integrated circuit to enable concurrent drive and sense operations. The circuit uses dynamic switching controlled by timing signals to alternate between drive and sense modes in different time slots, allowing continuous operation without requiring separate dedicated circuits for each function, thus improving productivity while managing complexity through integrated control.
Data Source
AI summary
An automated system includes transducers, at least one computing device, and at least one automated apparatus. The transducer(s) is/are driven and sensed using drive-sense circuit(s). A drives and senses drive and sense a transducer via a single line, generates a digital signal representative of a sensed analog feature to which the transducer is exposed, and transmits the digital signal to the computing device. The computing device receives digital signals from at least some of drive-sense circuits and process them in accordance with the automation process to produce an automated process command. The automated apparatus executes a portion of an automated process based on the automated process command.