用于海洋化學(xué)參數(shù)探測的多通道數(shù)據(jù)采集器的研發(fā)
發(fā)布時(shí)間：2018-10-25 10:21
【摘要】：本文描述了一種能夠?qū)崟r(shí)原位監(jiān)測的水下多通道數(shù)據(jù)采集器的研發(fā)。該數(shù)據(jù)采集器能夠同時(shí)處理離子選擇性電極和電流型傳感器的信號,具有高輸入阻抗、在線通訊、低功耗、小型化和高可靠性的特點(diǎn)。它可以連接各種各樣的化學(xué)傳感器,包括pH電極、鈣離子電極、硫化氫傳感器等。該數(shù)據(jù)采集器由處理傳感器信號的前置放大電路、控制電路的微控制器、用于數(shù)據(jù)存儲(chǔ)的Flash存儲(chǔ)器、RS-485通訊接口和電源模塊組成。本文對這些子模塊分別設(shè)計(jì),然后集成為一整套系統(tǒng)。 本文采用德州儀器公司的MSP430F149作為數(shù)據(jù)采集器的微控制器。MSP430F149有豐富的片內(nèi)外設(shè),還具有超低功耗、低供電電壓的特點(diǎn),這些特性使得其適用于系統(tǒng)小型化和低功耗設(shè)計(jì)。根據(jù)計(jì)算,該數(shù)據(jù)采集器可在2Hz采樣頻率下連續(xù)運(yùn)行283天。離子選擇性電極信號采集通道采用了具有高輸入阻抗的運(yùn)算放大器進(jìn)行電壓跟隨,使得數(shù)據(jù)采集器能夠準(zhǔn)確地測量離子選擇性電極產(chǎn)生的信號；電流型傳感器信號采集通道采用三電極放大系統(tǒng)；溫度信號采集通道采用三線制測溫電路,能夠消除接線電阻對測量結(jié)果的影響,提高測量的準(zhǔn)確性。電源管理模塊由一個(gè)低壓差線性穩(wěn)壓器和兩節(jié)鋰電池組成,存儲(chǔ)部分采用內(nèi)存為1GB的Flash存儲(chǔ)器,通訊部分采用RS-485協(xié)議。本文然后對系統(tǒng)的軟件部分進(jìn)行了數(shù)據(jù)格式定義、通訊協(xié)議的制定和狀態(tài)機(jī)設(shè)置等。 本文對數(shù)據(jù)采集器的采樣、數(shù)據(jù)存儲(chǔ)和通訊功能進(jìn)行驗(yàn)證實(shí)驗(yàn),重點(diǎn)是對離子選擇性電極信號采集通道、電流型傳感器信號采集通道和溫度傳感器信號采集通道進(jìn)行測試。實(shí)驗(yàn)結(jié)果都達(dá)到了預(yù)期目標(biāo),系統(tǒng)各個(gè)功能模塊性能良好。本文還做了與pH電極和溶解氧電極連接起來的綜合實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果證明該數(shù)據(jù)采集器能夠很好的獲得傳感器的信號。
[Abstract]:This paper describes the development of a multi-channel underwater data acquisition system which can be used for real-time in-situ monitoring. The data collector can process the signal of ion selective electrode and current sensor at the same time. It has the characteristics of high input impedance, online communication, low power consumption, miniaturization and high reliability. It can connect a variety of chemical sensors, including pH electrode, calcium electrode, hydrogen sulfide sensor and so on. The data collector consists of a preamplifier circuit for processing the sensor signal, a microcontroller for the control circuit, a Flash memory for data storage, a RS-485 communication interface and a power supply module. These sub-modules are designed and integrated into a whole system. In this paper, the MSP430F149 of Texas Instruments is used as the microcontroller of the data collector. The MSP430F149 has abundant peripheral devices, ultra-low power consumption and low power supply voltage. These characteristics make it suitable for the miniaturization and low-power design of the system. According to the calculation, the data collector can run continuously for 283 days at 2Hz sampling frequency. The Ion-selective electrode signal acquisition channel uses an operational amplifier with high input impedance to follow the voltage, so that the data collector can accurately measure the signal generated by the ion-selective electrode. The current sensor signal acquisition channel adopts a three-electrode amplification system and the temperature signal acquisition channel adopts a three-wire temperature measuring circuit which can eliminate the influence of the wiring resistance on the measurement results and improve the accuracy of the measurement. The power management module is composed of a low-voltage differential linear voltage regulator and two lithium batteries. The memory part is Flash memory with 1GB memory, and the communication part is RS-485 protocol. Then, the data format, communication protocol and state machine are defined in the software part of the system. In this paper, the data acquisition, data storage and communication functions of the data collector are verified. The emphasis is on the measurement of the ion selective electrode signal acquisition channel, the current sensor signal acquisition channel and the temperature sensor signal acquisition channel. The experimental results reach the expected goal, and the performance of each functional module of the system is good. A comprehensive experiment with pH electrode and dissolved oxygen electrode is also carried out in this paper. The experimental results show that the data collector can get the signal of the sensor well.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P716.5
本文編號：2293425
[Abstract]:This paper describes the development of a multi-channel underwater data acquisition system which can be used for real-time in-situ monitoring. The data collector can process the signal of ion selective electrode and current sensor at the same time. It has the characteristics of high input impedance, online communication, low power consumption, miniaturization and high reliability. It can connect a variety of chemical sensors, including pH electrode, calcium electrode, hydrogen sulfide sensor and so on. The data collector consists of a preamplifier circuit for processing the sensor signal, a microcontroller for the control circuit, a Flash memory for data storage, a RS-485 communication interface and a power supply module. These sub-modules are designed and integrated into a whole system. In this paper, the MSP430F149 of Texas Instruments is used as the microcontroller of the data collector. The MSP430F149 has abundant peripheral devices, ultra-low power consumption and low power supply voltage. These characteristics make it suitable for the miniaturization and low-power design of the system. According to the calculation, the data collector can run continuously for 283 days at 2Hz sampling frequency. The Ion-selective electrode signal acquisition channel uses an operational amplifier with high input impedance to follow the voltage, so that the data collector can accurately measure the signal generated by the ion-selective electrode. The current sensor signal acquisition channel adopts a three-electrode amplification system and the temperature signal acquisition channel adopts a three-wire temperature measuring circuit which can eliminate the influence of the wiring resistance on the measurement results and improve the accuracy of the measurement. The power management module is composed of a low-voltage differential linear voltage regulator and two lithium batteries. The memory part is Flash memory with 1GB memory, and the communication part is RS-485 protocol. Then, the data format, communication protocol and state machine are defined in the software part of the system. In this paper, the data acquisition, data storage and communication functions of the data collector are verified. The emphasis is on the measurement of the ion selective electrode signal acquisition channel, the current sensor signal acquisition channel and the temperature sensor signal acquisition channel. The experimental results reach the expected goal, and the performance of each functional module of the system is good. A comprehensive experiment with pH electrode and dissolved oxygen electrode is also carried out in this paper. The experimental results show that the data collector can get the signal of the sensor well.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P716.5
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 趙偉;陳鷹;楊燦軍;曹建偉;顧臨怡;;Design of Low-Power Data Logger of Deep Sea for Long-Term Field Observation[J];China Ocean Engineering;2009年01期
2 馬海潮;超高速數(shù)據(jù)采集技術(shù)發(fā)展現(xiàn)狀[J];測試技術(shù)學(xué)報(bào);2003年04期
3 趙延安;張效民;;基于THS1206的水下多路數(shù)據(jù)采集系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)[J];電聲技術(shù);2006年11期
4 汪品先;;海洋科學(xué)和技術(shù)協(xié)同發(fā)展的回顧[J];地球科學(xué)進(jìn)展;2011年06期
5 張雪彤;張榮華;胡書敏;王勇;;大洋中脊熱水探測與新型傳感器[J];地質(zhì)論評;2006年06期
6 甘英俊;周宏平;;基于三線制的高精度熱電阻測量電路設(shè)計(jì)[J];電子設(shè)計(jì)工程;2010年12期
7 姬再良;董樹文;;世界首座海洋觀測網(wǎng)體系——加拿大“海王星”海底觀測技術(shù)[J];地球?qū)W報(bào);2012年01期
8 秦華偉;杜加友;楊微;;水下低功耗數(shù)據(jù)采集器設(shè)計(jì)[J];杭州電子科技大學(xué)學(xué)報(bào);2007年03期
9 張兆英;CTD測量技術(shù)的現(xiàn)狀與發(fā)展[J];海洋技術(shù);2003年04期
10 高艷波;李慧青;柴玉萍;麻常雷;;深海高技術(shù)發(fā)展現(xiàn)狀及趨勢[J];海洋技術(shù);2010年03期
，本文編號：2293425
本文鏈接：http://sikaile.net/kejilunwen/haiyang/2293425.html
最近更新
教材專著
