Error analysis and reduction for a simple sensor-microcontroller interface

Correction to "Error analysis and reduction for a simple sensor-microcontroller interface"

Error analysis of a resistive sensor-to-microcontroller interface based on pulse-width modulation and time–ratio measurement shows that internal input and output resistances in microcontroller digital ports produce zero, gain and nonlinearity errors. The time–ratio measurement technique cancels these errors when the sensor resistance equals the reference resistor and reduces errors around that ...

Direct Inductive Sensor - to - Microcontroller Interface Circuit

Improving the Resolution in Direct Inductive Sensor-to-Microcontroller Interface

The paper describes an improved direct inductive sensor to microcontroller interface by incorporating external MOSFET transistors. In such a way, the measured discharging time interval can be increased (through the discharging time constant) which results in increased resolution for a given time base. The experimental results show that the resolution of the measurements can be significantly imp...

Investigating Power-Reduction for a Reconfigurable Sensor Interface

The power consumption of different implementations of a sensor interface utilized for wireless sensor network nodes are investigated. Most sensor network nodes use a CPU to implement the main functionality in software. This maintains flexibility compared with a pure ASIC implementation. Unfortunately, to utilize the CPU for simple tasks as periodically controlling the data acquisition proved ex...

Inertial Sensor Error Reduction through Calibration and Sensor Fusion

This paper presents the comparison between cooperative and local Kalman Filters (KF) for estimating the absolute segment angle, under two calibration conditions. A simplified calibration, that can be replicated in most laboratories; and a complex calibration, similar to that applied by commercial vendors. The cooperative filters use information from either all inertial sensors attached to the b...