基于應(yīng)變傳感技術(shù)的智能稱(chēng)重系統(tǒng)， 是針對(duì)無(wú)線(xiàn)遙控、遙測(cè)電子吊秤及單遙測(cè)電子吊秤等稱(chēng)重傳感器的微伏級(jí)直流信號(hào)進(jìn)行自動(dòng)測(cè)量， 利用單片機(jī)的智能特點(diǎn)而設(shè)計(jì)的。被測(cè)量信號(hào)由傳感器變換成電信號(hào)送到線(xiàn)性放大器放大，經(jīng)A/ D 轉(zhuǎn)換器后送到單片機(jī)系統(tǒng)實(shí)時(shí)處理， 通過(guò)軟件編碼技術(shù)進(jìn)行二次編碼后送到發(fā)射機(jī)發(fā)射。地面接收機(jī)收到信號(hào)后， 送到單片機(jī)系統(tǒng)進(jìn)行二次解碼， 再實(shí)時(shí)處理、儲(chǔ)存、打印， 并送到主計(jì)算機(jī)聯(lián)網(wǎng)。其關(guān)鍵技術(shù)包括：雙積分A/ D 轉(zhuǎn)換電路、單片機(jī)信號(hào)處理軟件、消除零漂、排除干擾的數(shù)字濾波、顯示準(zhǔn)確度調(diào)校和實(shí)時(shí)標(biāo)度變換等技術(shù)。
關(guān) 鍵 詞 ： 智能稱(chēng)重系統(tǒng)； 單片機(jī)； 漂移； 數(shù)字濾波； 編碼； 信號(hào)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