基于應變傳感技術的智能稱重系統(tǒng)設計

基于應變傳感技術的智能稱重系統(tǒng)， 是針對無線遙控、遙測電子吊秤及單遙測電子吊秤等稱重傳感器的微伏級直流信號進行自動測量， 利用單片機的智能特點而設計的。被測量信號由傳感器變換成電信號送到線性放大器放大，經A/ D 轉換器后送到單片機系統(tǒng)實時處理， 通過軟件編碼技術進行二次編碼后送到發(fā)射機發(fā)射。地面接收機收到信號后， 送到單片機系統(tǒng)進行二次解碼， 再實時處理、儲存、打印， 并送到主計算機聯網。其關鍵技術包括：雙積分A/ D 轉換電路、單片機信號處理軟件、消除零漂、排除干擾的數字濾波、顯示準確度調校和實時標度變換等技術。
關 鍵 詞 ： 智能稱重系統(tǒng)； 單片機； 漂移； 數字濾波； 編碼； 信號處理
Abstract: Aiming an automatic measure for DC sign in microvolt level of weighing sensors used in wireless remote control and measure of electronic suspend scale, the intelligent weighing system based on strain sensing technology is designed, in according to the intelligent characteristics for single chip microcomputer. The measured sign is changed into electronic sign with sensor, and it is sent to linear amplifier to magnify. After passing through A/D converter, it is sent to microcomputer and is processed in real-time. The processed sign is again coded with software coding technology and is sent into computer network. The key technologies include A/D conversion circuit with double integral, sign processing software for the microcomputer, eliminating zero excursion and the interference for digital filter, display
precision adjusted and real-time graduation.
Key Words: Intelligent weighing system; Single-chip microcomputer; Excursion; Digital filter;
Coding; Sign processing