content_image/954305.jpg content_image/954307.jpg
<img src='content_image/954305.jpg'>

<img src='content_image/954307.jpg'>

Ri and R2 monotonically increase and the voltage ratio trends show good resolution. To verify the performance of the locating capability of the device, a location test at the centre point of cell No. 12 was carried out, as shown in Figure 17(c). The ratios obtained from the measured output voltages were Ri = 0.43 and R2 = 0.96. Two curves corresponding to Ri and R2 were plotted and the intersection point was calculated as (2.05, 2.98). The distance deviation between the actual touch point and the calculated point was 1.5 mm. 

Similarly, through experimental testing and calculation by MATLAB, the distance deviations of all twenty-five points were determined as being between 0.02-1.60 mm. Therefore, the position-sensing resolution of the points in a single cell is ~1.6 mm. All the average values and the standard deviation values of the ratios 

