本研究為研究一套非接觸式電場感應系統，此系統應用於觸控面板上，一般廣泛使用的觸控面板會因接觸而損耗面板,造成畫面模糊，且皆無深淺感應,多點感應,一定要接觸面板才可以操控,不同面板大小要特製的缺點。 本研究設計一種利用電場感應方式，為一種不用接觸即可感應出物體之狀態，透過發射電場裝置在空間中發射訊號，四個電場感測裝置將X+、X-、Y+、Y-四個不同的電場訊號讀入，將得到之訊號通過訊號處理裝置之高通濾波器電路、放大器電路以及交流轉直流轉換電路將交流訊號轉換成直流訊號，得到四個不同的電壓值，經由National Instruments 儀器將訊號傳送至電腦中，使用LabVIEW 軟體將所得之訊號做即時化處理，利用在X、Y軸感應之不同電場量，決定待測物之位置、方向、深淺變化，將實際物體在感測範圍內之位置、單點定位以及多點縮放顯示在螢幕上。This research is designed a non-contact electric field sensors system. In usually touch panel was got lose by user using and touching the panel. Now in the Market touch panel don’t have depth sensing, multi-point sensing. When used in different size should make specially touch panel. And when user using the panel must be touch the panel. This research used a non-contact electric field sensors system for improve above-mentioned drawback. The system without touch can detect the objects state. Through the scatter electric field device scattered the signals in space, then the four electric field receiving devices X +, X-, Y +, Y- can read the four different electric signals, and then the signals through the signal processing device of the high-pass filter circuit, amplifier circuit, and AC to DC conversion circuit to convert AC signals to DC signals. The four different voltage values by using the National Instruments device inputted to the computer. By using LabVIEW software to do real-time signals processing. Thus the object position, direction, depth changes, and displays the actual objects in the sensor space of the position, single-point and multi-point positioning, and zoom on the screen will be decided.
