Design of High Precision Conductivity Sensor in Water Quality Monitoring
Journal Title: 河南科技大学学报（自然科学版） - Year 2019, Vol 40, Issue 5
Abstract
In order to solve the problem that the online detection results of the conductivity sensor in water quality monitoring were widely inaccurate, unstable and unsuitable integration, the high precision conductivity sensor based on ADuCM360 chips was designed.The sensor adopted the method of pulse excitation electrode, which effectively weakened the polarization phenomenon of the conductivity electrode by changing the pulse width and the duty ratio of pulse-width modulation (PWM) , the inconvenience of changing the PWM waveform by hardware was avoided, and the sensor debugging was more intelligent. The Pt1000 was used for temperature compensation to improve the detection accuracy of the sensor. The data transmission adopted the strong anti-interference ability ADM2587 as the RS-485 transceiver to realize communication with the host computer.The experiments show that the zero drift is 0.22%, the repeatability error is 0.50%, and the temperature compensation precision is 0.8%.All the parameters meet the requirements of the industry standard.
Authors and Affiliations
Wen LI, Zhiyong ZHANG, He LV, Yunxiao HE
Keywords
Related Articles
- EP ID EP594611
- DOI 10.15926/j.cnki.issn1672-6871.2019.05.004
- Views 91
- Downloads 0
Experiment of Double Row of Wheat Threshing Mechanism Based on Free-cutting Harvest
Taking the total loss of the threshing rate as the index,by using of the double row of grain threshing mechanism,single-factor tests and contrast test for the roller speed and the ratio of plate thickness to pole-teeth h...
Performance of Hybrid Refrigeration System with an Auxiliary Air-cooled Condenser
In order to solve the problem of the relative low refrigeration efficiency in both of the solar-powered absorption refrigeration and air-cooled electricity-driven compression refrigeration applied in building airconditio...
Preparation and Incident Photon-to-Current Properties of Black Titanium Dioxide Nanotube Arrays
The titanium dioxide (TiO2) nanotube arrays were synthesized through an anodization method, and the preparation process were studied through morphology characterization by scanning electron microscopy.The black TiO2 nano...
Photocatalyzed Degradation of Acid Yellow G via Nano-ZnO Loaded Bentonite
1
Preparation and Application of Selective Detection Paper for Salicylic Acid
Making use of the interaction of ethylenediamine-functionalized polymethylmethacrylate ( EDAPMMA) , salicylic acid and PMMA, a selective detection paper for salicylic acid was prepared. The effects of PMMA mass froction,...