Drive-Sense Circuit Feedback for Variable Sensor Load Detection
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Solution Overview
Problem
Existing data communication systems face challenges in efficiently collecting and processing sensed data due to variations in electrical characteristics of sensors, which affect the accuracy and reliability of data transmission and processing.
Innovation Solution
The implementation of a drive-sense circuit that determines the effects of different electrical characteristics on load characteristics by using a power signal change detection circuit to generate representative signals of these effects, allowing for accurate data processing and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensors with varying electrical characteristics are used in data communication systems, then the versatility and applicability of the system is improved, but the accuracy and reliability of data transmission deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the drive signal characteristics (voltage, current, frequency) based on the detected electrical characteristics of each sensor. The system measures parameters such as impedance, capacitance, and resistance of individual sensors, then modifies the drive signal parameters accordingly to compensate for variations, thereby maintaining reliable data transmission across diverse sensor types.
Solution Approach 2:
The patent implements feedback mechanisms where the system continuously monitors the electrical characteristics of sensors and uses this information to adjust the drive signal in real-time. The detection circuit measures sensor parameters, and this feedback is used to dynamically optimize the drive signal, ensuring accurate and reliable communication despite variations in sensor electrical properties.
2Measurement precision
If a drive-sense circuit is implemented to determine effects of electrical characteristics on load, then the measurement precision of physical conditions is improved, but the device complexity increases
Solution Approach 1:
The patent merges the drive circuit and sense circuit into a single integrated drive-sense circuit. This combination allows the system to both drive the sensor and detect its electrical characteristics through a unified circuit architecture, reducing the number of separate components while maintaining high measurement precision for physical conditions.
Solution Approach 2:
The drive-sense circuit is designed with multi-functionality, serving both as a signal source for driving sensors and as a detection circuit for measuring sensor electrical characteristics. This universal circuit performs multiple functions (driving, sensing, measuring) that would traditionally require separate dedicated circuits, thereby reducing overall device complexity while improving measurement capability.
Data Source
AI summary
A drive-sense circuit module includes at least one regulated source circuit coupled to a load, and to a loop correction circuit. The regulated source circuit generates a drive signal, which has a regulated characteristic and a controlled characteristic. At least one reference circuit applies a reference signal to the loop correction circuit that establishes a reference value of the controlled characteristic. The loop correction circuit senses an effect of one or more load characteristics on a sensed value of the controlled characteristic of the drive signal and generates a comparison signal based on the sensed value and the reference value of the controlled characteristic. A regulation signal is generated based on the comparison signal and used to regulate the regulated characteristic of the drive signal. A control module controls the regulated source circuit and the loop correction circuit to iterate through at least a first combination and a second combination of regulated characteristics and controlled characteristics.