自動(dòng)氣象溫濕度傳感器采集電路設(shè)計(jì)與實(shí)現(xiàn)
信息技術(shù)與網(wǎng)絡(luò)安全
李要中
(民航河南空管分局，河南 鄭州450000)
摘要： 為了順應(yīng)民航氣象自動(dòng)化發(fā)展需求，設(shè)計(jì)了一種自動(dòng)氣象溫濕度傳感器采集電路，能夠?qū)崿F(xiàn)對(duì)民用機(jī)場(chǎng)跑道周邊溫濕度要素的較高精度采集。系統(tǒng)對(duì)硬件電路部分進(jìn)行了模塊化結(jié)構(gòu)設(shè)計(jì)，對(duì)溫濕度采集原理進(jìn)行了分析，利用4線制PT100鉑電阻對(duì)溫度進(jìn)行測(cè)量，通過恒流源驅(qū)動(dòng)的方式產(chǎn)生溫度對(duì)應(yīng)電壓，再通過AD7792進(jìn)行采集，計(jì)算出溫度傳感器的電阻值Rpt100。濕度信號(hào)輸出類型為0～1 V的直流電壓，利用AD7792的第2通道以及片內(nèi)1.17 V的基準(zhǔn)電壓進(jìn)行采集，得到ADSample2采樣值,計(jì)算出濕度對(duì)應(yīng)的電壓值Vrh(單位：mV)， Vrh在數(shù)值上與濕度采樣值相等。試驗(yàn)證明采集電路可以完成對(duì)溫濕度信號(hào)的采集。
中圖分類號(hào)： TP29
文獻(xiàn)標(biāo)識(shí)碼： A
DOI： 10.19358/j.issn.2096-5133.2021.04.010
引用格式： 李要中. 自動(dòng)氣象溫濕度傳感器采集電路設(shè)計(jì)與實(shí)現(xiàn)[J].信息技術(shù)與網(wǎng)絡(luò)安全，2021，40(4)：64-69.
文獻(xiàn)標(biāo)識(shí)碼： A
DOI： 10.19358/j.issn.2096-5133.2021.04.010
引用格式： 李要中. 自動(dòng)氣象溫濕度傳感器采集電路設(shè)計(jì)與實(shí)現(xiàn)[J].信息技術(shù)與網(wǎng)絡(luò)安全，2021，40(4)：64-69.
Design and implementation of acquisition circuit for automatic meteorological temperature and humidity sensor
Li Yaozhong
(Civil Aviation Henan Air Traffic Control Branch，Zhengzhou 450000，China)
Abstract： In order to meet the needs of the development of civil aviation meteorological automation, an automatic meteorological temperature and humidity sensor acquisition circuit is designed, which can achieve high precision acquisition of temperature and humidity elements around the runway of civil airport. The hardware circuit of the system is designed with modular structure, and the principle of temperature and humidity acquisition is analyzed. The temperature is measured by 4-wire PT100 platinum resistance. The voltage corresponding to temperature is generated by constant current source driving. Then the resistance value Rpt100 of temperature sensor is calculated by AD7792. The output type of humidity signal is 0～1 V DC voltage. The second channel of AD7792 and the reference voltage of 1.17 V on-chip are used to collect the sample value of ADSample2. The voltage value Vrh(unit：mV) corresponding to humidity is calculated, and Vrh is equal to the humidity sampling value in value. Experimental results show that the acquisition circuit can complete the acquisition of temperature and humidity signals.
Key words : meteorological elements；temperature and humidity；sensor；signal acquisition
0 引言
隨著氣象探測(cè)技術(shù)的不斷發(fā)展[1]，結(jié)合目前民航氣象探測(cè)業(yè)務(wù)需求[2]，對(duì)氣象溫濕度信號(hào)采集提出了更高的要求。本文對(duì)氣象溫濕度傳感器進(jìn)行了自動(dòng)數(shù)字化研究，設(shè)計(jì)了一種自動(dòng)溫濕度傳感器采集電路，該電路結(jié)合溫濕度測(cè)量原理，以高精度低功耗微型化方式將數(shù)據(jù)采集處理單元集成在采集板上，實(shí)現(xiàn)對(duì)機(jī)場(chǎng)氣象溫濕度觀測(cè)數(shù)據(jù)的采集、處理、存儲(chǔ)等功能，能夠廣泛地應(yīng)用于民航氣象業(yè)務(wù)中。
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作者信息：
李要中
(民航河南空管分局，河南 鄭州450000)
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