Development of a Calibrated Transducer CMOS Circuit for Water Turbidity Monitoring

Chiang, Cheng‐Ta; Huang, Shiang‐Fen; Wu, Chieh-Neng

doi:10.1109/jsen.2016.2544800

Cited by 11 publications

(4 citation statements)

References 14 publications

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“…It is surprising that although turbidity measurement and monitoring have long been a research focus, only several attempts have been made into designing and implementing low-cost sensors for fresh-water quality management purposes. The majority of water quality monitoring products, as stated in the preceding section, and turbidity sensor designs [11] [12] are sophisticated and often costly, which therefore does not meet the overall aim of this work.…”

Section: Related Workmentioning

confidence: 99%

Low-Cost Turbidity Sensor for Low-Power Wireless Monitoring of Fresh-Water Courses

et al. 2018

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This paper reports on a low-cost turbidity sensor design for continuous on-line water quality monitoring applications. The measurement of turbidity by agricultural and environmental scientists is restricted by the current cost and functionality of available commercial instruments. Although there are a number of low-cost turbidity sensors exploited within domestic 'white-goods', such as dishwashers, the lack of sensitivity and power-usage of these devices make them unsuitable for freshwater quality monitoring purposes. The recent introduction of wireless protocols and hardware, associated with the 'Internet-of-Things' concept for machine-tomachine autonomous sensing and control, has enabled the largescale networked intelligent water turbidity monitoring system that implements relatively low-cost sensors to be developed. The proposed sensor uses both transmitted light and orthogonal (90 degrees) scattered light detection principles, and is 2-3 orders of magnitude lower in cost as compared to the existing commercial turbidity sensors. With an 850nm infrared LED, and dual orthogonal photodetectors, the proposed design is capable of measuring turbidity within the range of 0-1000 Nephelometric Turbidity Unit (NTU) with improved accuracy and robustness as compared to the existing low cost turbidity sensors. The combination of orthogonal and transmitted light detection unit provide both 0-200 NTU high resolution and accuracy sensing and 0-1000 NTU lower resolution and accuracy sensing capability. Results from calibration experiment are presented, which proved that the proposed sensor design produced a comparable turbidity reading as a commercial turbidity sensor.

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Section: Related Workmentioning

confidence: 99%

Low-Cost Turbidity Sensor for Low-Power Wireless Monitoring of Fresh-Water Courses

et al. 2018

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“…Hence, the whole system is complicated and the cost is expensive. 18,19 Additionally, a smartphone camera with the HydroColor was applied to measure the remote sensing reflectance and turbidity. 20 In this study, a simple device with low cost was designed to measure the turbidity.…”

Section: Introductionmentioning

confidence: 99%

“…For them, it is necessary to design the optical path, photoelectric detection circuit, signal amplification and processing circuit, and A/D conversion circuit. Hence, the whole system is complicated and the cost is expensive. , Additionally, a smartphone camera with the HydroColor was applied to measure the remote sensing reflectance and turbidity …”

Section: Introductionmentioning

confidence: 99%

Development of a New Method for Turbidity Measurement Using Two NIR Digital Cameras

et al. 2020

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This paper proposes a new method of using two NIR digital cameras to measure water turbidity accurately and quickly. A measuring device based on an NIR camera and image processing software is designed. Two NIR cameras collect scattered and transmitted images when the NIR light is passing through the turbid solution. The average RGB values of 400 pixels in the central region of the image are obtained and converted into CIE Lab color space values. The water turbidity was measured by the functional relationship between turbidity and the corresponding color components (R, G, B, L, a, b, and grayscale). The results of comparison with a commercial turbidimeter show that this method has a high accuracy for the determination of standard solution with wider linear range and is consistent with the turbidimeter results for the measurement of real samples, which verifies the feasibility of this method.

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“…Heavy metals present in water and soil will not disappear for no reason and cannot be degraded, but can only be transferred to each other in the system [4]. In China, there have been many cases of heavy metals causing human life safety and property losses.…”

Section: Introductionmentioning

confidence: 99%

Antenna Potential of Crawfish to Monitor Hg^2+ Pollution in Water

2020

AJAS

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Water pollution is caused by harmful chemicals, so that the use value of water is reduced or lost. Heavy metal pollution, especially mercury ion pollution, is becoming more and more serious. The purpose of this article is to study the possibility of crayfish antennae potential monitoring of water Hg^2+ pollution. The current situation of water pollution and the experimental principles of this paper are briefly introduced through literature research and investigation, and the effect of different concentrations of mercury ions on the release of the tentacle potential of Kjeldahl with a body weight of 15g was analyzed experimentally. The results showed that the solution of 10 ppb mercury ion concentration had the most obvious inhibition on the release of tentacle potential of crawfish, with a slope of -0.1438. Followed by a mercury ion solution with a concentration of 1 ppb, the slope reached -0.0842. As a whole, the higher the concentration of mercury ions in the solution, the stronger the inhibitory effect on the release of antennae potential of crawfish. The method of monitoring the water body of the crawfish antennae potential has the possibility of application. However, under actual circumstances, the ions in the solution are diverse and extremely rich. It is difficult to ensure that other ions have no effect on the release of tentacle potential of crawfish. The experiments in this article have only been conducted on inorganic mercury ions. In fact, organic mercury still exists in water pollution. Organic pollution cannot be ignored either, and further research is needed.

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Development of a Calibrated Transducer CMOS Circuit for Water Turbidity Monitoring

Cited by 11 publications

References 14 publications

Low-Cost Turbidity Sensor for Low-Power Wireless Monitoring of Fresh-Water Courses

Low-Cost Turbidity Sensor for Low-Power Wireless Monitoring of Fresh-Water Courses

Development of a New Method for Turbidity Measurement Using Two NIR Digital Cameras

Antenna Potential of Crawfish to Monitor Hg^2+ Pollution in Water

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