溫度信號(hào)和壓力信號(hào)的計(jì)算機(jī)檢測(cè)系統(tǒng)

頁(yè)數(shù) 53 字?jǐn)?shù) 22143

摘要：本文針對(duì)模壓成型實(shí)驗(yàn)中對(duì)溫度和壓力的檢測(cè)要求，設(shè)計(jì)了一種簡(jiǎn)單實(shí)用的溫度信號(hào)和壓力信號(hào)的計(jì)算機(jī)檢測(cè)系統(tǒng)。該系統(tǒng)采用以單片機(jī)為核心構(gòu)成的數(shù)據(jù)采集系統(tǒng)進(jìn)行數(shù)據(jù)采集，并以普通PC作為上位機(jī)共同組成檢測(cè)系統(tǒng)，實(shí)現(xiàn)了溫度信號(hào)、壓力信號(hào)的實(shí)時(shí)顯示，并且自動(dòng)將所采集的數(shù)據(jù)進(jìn)行記錄，生成EXCEL文件，便于利用其提供的數(shù)學(xué)工具或其它的數(shù)學(xué)工具對(duì)數(shù)據(jù)進(jìn)行分析研究。
根據(jù)實(shí)驗(yàn)室現(xiàn)有的條件選擇檢測(cè)系統(tǒng)所需芯片和組成方案；在單片機(jī)與PC機(jī)的通訊方面，采用了當(dāng)前使用最廣泛的RS-232串行通訊協(xié)議，簡(jiǎn)化了硬件結(jié)構(gòu)，降低了成本。傳感器產(chǎn)生的電信號(hào)由應(yīng)變儀進(jìn)行濾波、放大和I/V轉(zhuǎn)換。經(jīng)實(shí)驗(yàn)證明本系統(tǒng)的穩(wěn)定性良好，測(cè)量誤差在允許的范圍之內(nèi)，能夠滿足實(shí)驗(yàn)對(duì)數(shù)據(jù)采集和記錄的要求和相應(yīng)的精度要求。

關(guān)鍵詞：?jiǎn)纹瑱C(jī),RS-232,VB,A/D轉(zhuǎn)換,串行通訊

ABSTRACT：In order to measure the signal of temperature and pressure in experiment of press moulding of ecotypic reproducible materials. A simple applied measuring system aided by computer was designed. The system includes a data collecting system centered by monolithic processor and a Personal Computer with a software compiled by Visual Basic. The fuction of real time display of the temperature and pressure signals was realized, and the data collected was recorded to a Excel file automatically. Thus enables us to analyse and study the data using the mathematical tools provided by Excel or other softwares. At the same time, the aim to demarcate the sensor at PC was carried out.
The chip needed by the system and the composing scheme was selected in accordance to the conditions that provided by the laboratory. In aspect to the communication of single chip and PC, RS-232 was selected. It is used most widely today and the structure of hardware was predigested. Thus the cost was reduced. The telesignal produced by sensor was sieved, magnified and transformed by strain gauge. It is proved by experiment that the stability of the system is fine and the fallibility is in range of allowable. The system can fulfil the data collecting and recording request and also the relevant precision request.
Key Words: Monolithic Processor, RS-232, Visual Basic, A/D Transform, Serial Communication

參 考 文 獻(xiàn)
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