Next Article in Journal
Traffic Vehicle Counting in Jam Flow Conditions Using Low-Cost and Energy-Efficient Wireless Magnetic Sensors
Previous Article in Journal
Noise Reduction Effect of Multiple-Sampling-Based Signal-Readout Circuits for Ultra-Low Noise CMOS Image Sensors
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(11), 1869;

Real-Time Location Tracking of Multiple Construction Laborers

R&D Center, SamwooIMC CO., LTD, Seoul 05660, Korea
Department of Civil Engineering, Inha University, Incheon 22212, Korea
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M.N. Passaro
Received: 16 July 2016 / Revised: 1 November 2016 / Accepted: 2 November 2016 / Published: 6 November 2016
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [5315 KB, uploaded 8 November 2016]   |  


A real-time location (RTL) system was developed to improve safety for multiple laborers in confined construction sites. The RTL system can monitor the location and movement of multiple laborers in real time. A portable RTL system with a low-battery mode was developed to accommodate various constraints in the construction site. A conventional RTL system that uses radio signal strength indicators (RSSIs) has high error, so an accelerometer with Bluetooth Low Energy (BLE) was added, and a calculation process is suggested. Field tests were performed for validation in underground construction and bridge overlay sites. The results show that the accelerometer and BLE can be used as effective sensors to detect the movement of laborers. When the sensor is fixed, the average error ranges 0.2–0.22 m, and when the sensor is moving, the average error ranges 0.1–0.47 m. View Full-Text
Keywords: construction site; RTL system; radio signal strength indicator; accelerometer construction site; RTL system; radio signal strength indicator; accelerometer

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Lim, J.-S.; Song, K.-I.; Lee, H.-L. Real-Time Location Tracking of Multiple Construction Laborers. Sensors 2016, 16, 1869.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top