Improved Capacitive Proximity Detection for Conductive Objects through Target Profile Estimation

Figure 5

Operation flow for improved distance measurement. First, create separate regression models for all the objects with experimental data (total capacitance is shown at the top, but several sweeping patterns are generated per measurement). When an object appears, use a classifier to recognize its surface profile based on one of the two sweeping patterns. Lastly, select the proper regression model depending on the classification result for advanced distance estimation.