A DSP Based Prototype for Water Conductivity Measurements

Komarek, Milan; Novotný, Martin; Ramos, Pedro M.; Pereira, José Miguel

doi:10.1109/imtc.2006.328618

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…Some multichannel acquisition systems apply a dedicated analogue-to-digital converter (ADC) for each channel to acquire the signals simultaneously. However, those hardware configurations limit the amount of channels that can be acquired and bring more cost and power consumption [4]. If simultaneous sampling for all channels is not necessary, some use a single A/D converter and multiplexers to sample the input signals, thus reducing the system complexity and cost [5, 6].…”

Section: Introductionmentioning

confidence: 99%

An Efficiency Multiplexing Scheme and Improved Sampling Method for Multichannel Data Acquisition System

Chu

Ren

Liu

et al. 2015

International Journal of Distributed Sensor Networks

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The paper proposes an efficient multiplexing scheme that is easy to realize synchronous sampling in a multichannel acquisition system with the large number of analogue inputs and different sampling rates. And then, a simple improved sampling control method is also employed to improve the performance. All the technology of implementing the method is by using a low-cost field programmable gate array (FPGA). A sampling lookup table is built by the rule-based synchronous sampling frame structure for the input analogue multiplexers and stored into the internal block RAM resource in the FPGA to reduce the internal wiring resources and optimize the utilization. The improved sampling method obtains several samples in a sampling period and gets the average value as the final output for the sampling channel. In addition, the standard sine wave FFT test method is implemented to test the dynamic parameters of the acquisition channels. The experiment results show that the dynamic performance of the acquisition system is significantly improved. The proposed multiplexing scheme and sampling method can easily be reconfigured for other applications.

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Section: Introductionmentioning

confidence: 99%

An Efficiency Multiplexing Scheme and Improved Sampling Method for Multichannel Data Acquisition System

Chu

Ren

Liu

et al. 2015

International Journal of Distributed Sensor Networks

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“…This means that acceptable conductivity measurement accuracy implies temperature measurement in order to obtain a temperature compensated conductivity measurement for a given reference temperature, typically 25 ℃ or 20 ℃ . [3] There are two main types of conductivity sensors: electrode (or contacting sensors) and toroidal or inductive sensors [4][5] [6]. Electrode sensors contain two, three, or four electrodes.…”

Section: Introductionmentioning

confidence: 99%

An Intelligent Four-Electrode Conductivity Sensor for Aquaculture

Zhang

Wang

et al. 2013

Computer and Computing Technologies in Agriculture VI

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Abstract. Conductivity is regard as a key technical parameter in modern intensive fish farming management. The water conductivity sensors are sophisticated devices used in the aquaculture monitoring field to understand the effects of climate changes on fish ponds. In this paper a new four-electrode smart sensor is proposed for water conductivity measurements of aquaculture monitoring.The main advantages of these sensors include a high precision, a good stability and an intrinsic capability to minimize errors caused by polarization. A temperature sensor is also included in the system to measure the water temperature and, thus, compensate the water-conductivity temperature dependence. The prototype developed is appropriate for conductivity measurement in the range of 0-50mS/cm, 0-40 ℃ . A cure relationship was found between the out-put value of each standard solution measured by the sensor and the electric conductivity concentration.

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A Survey on Data Acquisition Systems DAQ

Abdallah

Elkeelany

2009

2009 International Conference on Computing, Engineering and Information

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A DSP Based Prototype for Water Conductivity Measurements

Cited by 4 publications

References 13 publications

An Efficiency Multiplexing Scheme and Improved Sampling Method for Multichannel Data Acquisition System

An Efficiency Multiplexing Scheme and Improved Sampling Method for Multichannel Data Acquisition System

An Intelligent Four-Electrode Conductivity Sensor for Aquaculture

A Survey on Data Acquisition Systems DAQ

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