Simple, robust eddy correlation amplifier for aquatic dissolved oxygen and hydrogen sulfide flux measurements
Simple, robust eddy correlation amplifier for aquatic dissolved oxygen and hydrogen sulfide flux measurements
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简单、坚固的涡相关放大器，用于水生溶解氧和硫化氢通量测量
DOI：
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
P. Linke
中科院分区：
文献类型：
--
作者：
D. McGinnis;S. Cherednichenko;S. Sommer;P. Berg;L. Rovelli;R. Schwarz;R. Glud;P. Linke
涡动相关（EC）技术的水生应用越来越受欢迎，并逐渐成为解决底栖O2通量的标准方法。通过包括当地流体动力学的影响，EC技术比传统方法（即，底栖室和着陆器微型剖面仪）。EC技术的日益普及导致了对易于访问和强大的EC仪器的更大需求。目前，EC仪器仅限于两个仍处于开发阶段的市售系统。在这里，我们提出了一个强大的，开源EC皮放大器，设计简单，可以很容易地适应新的和现有的声学多普勒测速仪（ADV）。该微微放大器的响应时间< 0.1 ms，并具有电流隔离功能，可确保信号的噪声污染非常低。它可以调节以适应不同范围的微电极灵敏度以及其他类型的安培微电极。我们表明，提取的通量值对降低的微电极操作范围不敏感（即，分辨率较低），并且使用16位或14位模数转换器不会导致信号丢失。最后，我们证明了picoamplifier的能力与现场研究测量溶解O2和H2S EC通量。这里介绍的微微放大器能够持续采集高质量的EC数据，并为那些希望获得EC仪器的人提供了一个简单的解决方案。放大器的电路原理图在网络附录中给出。
The aquatic application of the eddy correlation (EC) technique is growing more popular and is gradually becoming a standard method for resolving benthic O2 fluxes. By including the effects of the local hydrodynamics, the EC technique provides greater insight into the nature of benthic O2 exchange than traditional methods (i.e., benthic chambers and lander microprofilers). The growing popularity of the EC technique has led to a greater demand for easily accessible and robust EC instrumentation. Currently, the EC instrumentation is limited to two commercially available systems that are still in the development stage. Here, we present a robust, open source EC picoamplifier that is simple in design and can be easily adapted to both new and existing acoustic Doppler velocimeters (ADV). The picoamplifier has a response time of < 0.1 ms and features galvanic isolation that ensures very low noise contamination of the signal. It can be adjusted to accommodate varying ranges of microelectrode sensitivity as well as other types of amperometric microelectrodes. We show that the extracted flux values are not sensitive to reduced microelectrode operational ranges (i.e., lower resolution) and that no signal loss results from using either a 16‐ or 14‐bit analog‐to‐digital converter. Finally, we demonstrate the capabilities of the picoamplifier with field studies measuring both dissolved O2 and H2S EC fluxes. The picoamplifier presented here consistently acquires high‐quality EC data and provides a simple solution for those who wish to obtain EC instrumentation. The schematic of the amplifier's circuitry is given in the Web Appendix.
影响因子：
2.7
作者：
Berg, Peter;Glud, Ronnie N.;Kitazato, Hiroshi
通讯作者：
Kitazato, Hiroshi
影响因子：
2.5
作者：
Glud, Ronnie N.;Berg, Peter;Rysgaard, Soren
通讯作者：
Rysgaard, Soren