Multi-criteria anomaly detection in urban noise sensor networks

2014 ◽  
Vol 16 (10) ◽  
pp. 2249-2258 ◽  
Author(s):  
Samuel Dauwe ◽  
Damiano Oldoni ◽  
Bernard De Baets ◽  
Timothy Van Renterghem ◽  
Dick Botteldooren ◽  
...  
Keyword(s):  
Sensor Networks ◽  
Anomaly Detection ◽  
Data Acquisition ◽  
Low Cost ◽  
Living Environment ◽  
Monitoring Networks ◽  
Urban Noise ◽  
Data Acquisition Systems

The growing concern of citizens about the quality of their living environment and the emergence of low-cost microphones and data acquisition systems triggered the deployment of numerous noise monitoring networks spread over large geographical areas.

scholarly journals Laboratory Evaluations of Correction Equations with Multiple Choices for Seed Low-Cost Particle Sensing Devices in Sensor Networks

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3661 ◽  
Author(s):  
Wen-Cheng Vincent Wang ◽  
Shih-Chun Candice Lung ◽  
Chun Hu Liu ◽  
Chen-Kai Shui
Keyword(s):  
Sensor Networks ◽  
Low Cost ◽  
Before And After ◽  
Sensor Signals ◽  
Research Grade ◽  
Areas Of Interest ◽  
Equivalent Method ◽  
Correction Equations ◽  
Practical Recommendations

To tackle the challenge of the data accuracy issues of low-cost sensors (LCSs), the objective of this work was to obtain robust correction equations to convert LCS signals into data comparable to that of research-grade instruments using side-by-side comparisons. Limited sets of seed LCS devices, after laboratory evaluations, can be installed strategically in areas of interest without official monitoring stations to enable reading adjustments of other uncalibrated LCS devices to enhance the data quality of sensor networks. The robustness of these equations for LCS devices (AS-LUNG with PMS3003 sensor) under a hood and a chamber with two different burnt materials and before and after 1.5 years of field campaigns were evaluated. Correction equations with incense or mosquito coils burning inside a chamber with segmented regressions had a high R2 of 0.999, less than 6.0% variability in the slopes, and a mean RMSE of 1.18 µg/m3 for 0.1–200 µg/m3 of PM2.5, with a slightly higher RMSE for 0.1–400 µg/m3 compared to EDM-180. Similar results were obtained for PM1, with an upper limit of 200 µg/m3. Sensor signals drifted 19–24% after 1.5 years in the field. Practical recommendations are given to obtain equations for Federal-Equivalent-Method-comparable measurements considering variability and cost.

scholarly journals A low-cost interface for multi-electrode array data acquisition systems

BioTechniques ◽  
2008 ◽  
Vol 45 (4) ◽  
pp. 451-456 ◽  
Author(s):  
Michael Serra ◽  
Amy Chan ◽  
Maya Dubey ◽  
Thomas B. Shea
Keyword(s):  
Data Acquisition ◽  
Low Cost ◽  
Electrode Array ◽  
Array Data ◽  
Data Acquisition Systems ◽  
Multi Electrode Array

Inexpensive Diode Thermometry Using Integrated Circuit Components

1974 ◽  
Vol 4 (2) ◽  
pp. 250-254 ◽  
Author(s):  
P. A. Tang ◽  
K. G. McNaughton ◽  
T. A. Black
Keyword(s):  
Data Acquisition ◽  
Integrated Circuit ◽  
Low Cost ◽  
High Accuracy ◽  
Temperature Sensing ◽  
Data Acquisition Systems ◽  
Circuit Components ◽  
Two Temperature

Two temperature sensing circuits using silicon diodes and integrated circuit components are described. They are intended for use with data acquisition systems and are suitable for field or laboratory applications. Both can be constructed by persons without electronic training and have features of simplicity, low cost, and high accuracy.

PC104 Interface Recommended for High Speed Data Acquisition Systems

2013 ◽  
Vol 332 ◽  
pp. 119-123
Author(s):  
Dorina Purcaru ◽  
Anca Purcaru
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Low Cost ◽  
Sampling Rate ◽  
Signal Acquisition ◽  
Synchronized Sampling ◽  
Data Acquisition Systems ◽  
High Speed Data Acquisition ◽  
High Speed Data ◽  
Energetic Systems

The interface presented in this paper performs a synchronized sampling of all eight common-mode or differential analog inputs with a high sampling rate. This is a low cost interface, entirely controlled by the PC104 CPU. The paper is focused on design and operation aspects of the synchronized analog-to-digital conversion module. This interface is recommended for high speed data acquisition systems and finds its utility in energetic systems, for monitoring the power quality and for recording different specific transient events. Some programmable electronic modules which perform analog and digital signal acquisition in energetic systems already contain a PC104 interface with synchronized sampling of analog inputs; some experimental results are also presented in this paper.

PC104 Interface Recommended for High Speed Data Acquisition Systems

2013 ◽  
Vol 325-326 ◽  
pp. 926-929 ◽  
Author(s):  
Dorina Purcaru ◽  
Cornelia Gordan ◽  
Romulus Reiz ◽  
Anca Purcaru
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Low Cost ◽  
Sampling Rate ◽  
Digital Signal ◽  
Signal Acquisition ◽  
Synchronized Sampling ◽  
Data Acquisition Systems ◽  
High Speed Data Acquisition ◽  
High Speed Data

The interface presented in this paper is recommended for high speed data acquisition systems; it performs a synchronized sampling of all common-mode or differential analog inputs with a high sampling rate. This is a low cost interface, entirely controlled by the PC104 CPU. Programmable electronic modules that contain such PC104 interfaces can be found running in the energetic system from Romania; these dedicated equipments perform the analog and digital signal acquisition for monitoring and recording different specific transient events. Some experimental results obtained using the disturbance monitoring device PC-08/104 are also presented in this paper.

scholarly journals HOW WE FAILED TO PLAN FOR HABITABILITY

2006 ◽  
Vol 4 ◽  
Author(s):  
Lee Lik Meng ◽  
Aldrin Abdullah ◽  
Tan Sook Fern ◽  
Nurwati Badarulzaman ◽  
Ahmad Sanusi Hassan
Keyword(s):  
Low Cost ◽  
New Urbanism ◽  
Residential Development ◽  
Living Environment ◽  
Planning System ◽  
Garden City ◽  
Top Down ◽  
Human Needs ◽  
Residential Developments

A quality housing development should not only take into account the physical aspects of design but also be sensitive to human needs. Habitability in housing involves several components, including environmental factors, man-made designs, socio-cultural operations and psychological impacts. Elements of habitability can be observed in various concepts of residential developments including classical concepts such as the Garden City Movement and the Neighbourhood Unit. In Malaysia, the Malay Kampung and the Chinese New Village exemplify some ideal living practices relating to habitability. Both the classical and traditional concepts influenced subsequent residential developments in Malaysia such as the Jengka Project, Kampung Tersusun, Town 8, Cyberjaya and Putrajaya. However, not all residential developments succeeded in creating a quality living environment. More recent concepts such as the New Urbanism and the China Healthy Residence have placed greater emphasis in dealing with such issues. In Malaysia, legislations and policies have not adequately addressed the problems on habitability. We lack a thorough planning system, which prepares and monitors the quality of our residential development. Failures in planning policies have also created other planning issues that affect habitability, as portrayed in the case of the Rifle Range Low-cost Flats in Penang. The top-down approach in housing policy andplanning should be geared up to match the growth of community towards achieving habitability.

scholarly journals Framework for the Simulation of Sensor Networks Aimed at Evaluating In Situ Calibration Algorithms

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4577
Author(s):  
Florentin Delaine ◽  
Bérengère Lebental ◽  
Hervé Rivano
Keyword(s):  
Sensor Networks ◽  
Sensor Network ◽  
Low Cost ◽  
Test Case ◽  
Dense Networks ◽  
In Situ Calibration ◽  
Primary Test ◽  
The Impact

The drastically increasing availability of low-cost sensors for environmental monitoring has fostered a large interest in the literature. One particular challenge for such devices is the fast degradation over time of the quality of their data. Therefore, the instruments require frequent calibrations. Traditionally, this operation is carried out on each sensor in dedicated laboratories. This is not economically sustainable for dense networks of low-cost sensors. An alternative that has been investigated is in situ calibration: exploiting the properties of the sensor network, the instruments are calibrated while staying in the field and preferably without any physical intervention. The literature indicates there is wide variety of in situ calibration strategies depending on the type of sensor network deployed. However, there is a lack for a systematic benchmark of calibration algorithms. In this paper, we propose the first framework for the simulation of sensor networks enabling a systematic comparison of in situ calibration strategies with reproducibility, and scalability. We showcase it on a primary test case applied to several calibration strategies for blind and static sensor networks. The performances of calibration are shown to be tightly related to the deployment of the network itself, the parameters of the algorithm and the metrics used to evaluate the results. We study the impact of the main modelling choices and adjustments of parameters in our framework and highlight their influence on the results of the calibration algorithms. We also show how our framework can be used as a tool for the design of a network of low-cost sensors.

APART: Low Cost Active Replication for Multi-tier Data Acquisition Systems

2008 ◽  
Author(s):  
Paolo Romano ◽  
Diego Rughetti ◽  
Francesco Quaglia ◽  
Bruno Ciciani
Keyword(s):  
Data Acquisition ◽  
Low Cost ◽  
Data Acquisition Systems ◽  
Active Replication
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