自動氣象溫濕度傳感器采集電路設計與實現
信息技術與網絡安全
李要中
(民航河南空管分局,河南 鄭州450000)
摘要: 為了順應民航氣象自動化發展需求,設計了一種自動氣象溫濕度傳感器采集電路,能夠實現對民用機場跑道周邊溫濕度要素的較高精度采集。系統對硬件電路部分進行了模塊化結構設計,對溫濕度采集原理進行了分析,利用4線制PT100鉑電阻對溫度進行測量,通過恒流源驅動的方式產生溫度對應電壓,再通過AD7792進行采集,計算出溫度傳感器的電阻值Rpt100。濕度信號輸出類型為0~1 V的直流電壓,利用AD7792的第2通道以及片內1.17 V的基準電壓進行采集,得到ADSample2采樣值,計算出濕度對應的電壓值Vrh(單位:mV), Vrh在數值上與濕度采樣值相等。試驗證明采集電路可以完成對溫濕度信號的采集。
中圖分類號: TP29
文獻標識碼: A
DOI: 10.19358/j.issn.2096-5133.2021.04.010
引用格式: 李要中. 自動氣象溫濕度傳感器采集電路設計與實現[J].信息技術與網絡安全,2021,40(4):64-69.
文獻標識碼: A
DOI: 10.19358/j.issn.2096-5133.2021.04.010
引用格式: 李要中. 自動氣象溫濕度傳感器采集電路設計與實現[J].信息技術與網絡安全,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
隨著氣象探測技術的不斷發展[1],結合目前民航氣象探測業務需求[2],對氣象溫濕度信號采集提出了更高的要求。本文對氣象溫濕度傳感器進行了自動數字化研究,設計了一種自動溫濕度傳感器采集電路,該電路結合溫濕度測量原理,以高精度低功耗微型化方式將數據采集處理單元集成在采集板上,實現對機場氣象溫濕度觀測數據的采集、處理、存儲等功能,能夠廣泛地應用于民航氣象業務中。
本文詳細內容請下載:http://www.j7575.cn/resource/share/2000003479
作者信息:
李要中
(民航河南空管分局,河南 鄭州450000)
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