Development of Laser Water Level Measuring System without Cooperative Target

Liu, Mengde; Gai, Zhongtao; Zhao, Jie; Cui, Xianze; Li, Yang; Chu, Shibo; Yang, Junxian

doi:10.1109/sopo.2012.6270966

Cited by 3 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The laser-ranging sensor we tested is not appropriate for water level monitoring due to the significant errors of measurement (during the experiment, the median error was almost always .20 mm). The poor results of this sensor may be explained first by its low accuracy (+36 mm according to the manufacturer) and secondly because of the limited reflectivity of laser on the water surface (Liu et al 2012). The importance of the reflective surface is confirmed by Adarsh et al (2016) who compared the performance of the ultrasonic-ranging and the infrared-ranging techniques with different types of material.…”

Section: Comparison Of the Performance Of The Sensors Testedmentioning

confidence: 99%

A platform and protocol to standardise the test and selection low-cost sensors for water level monitoring

et al. 2020

View full text Add to dashboard Cite

Water infrastructure in cities is complex and requires proactive management to optimise function. The scale and distribution of assets across municipalities requires affordable systems which can trigger alerts. Systems underpinned by low-cost sensors could meet increasing monitoring needs: more assets, more often, and at a better resolution. However, low-cost sensors require appropriate testing to assess their performance and optimise their use. Here, we focus on low-cost water level sensors, often considered as the main monitoring parameters for water-related infrastructures. We developed a platform and testing protocol to assess the suitability of low-cost sensors. We assessed the performance of three widely used low-cost sensors: laser-ranging, ultrasonic-ranging, and pressure. Our main results showed that the ultrasonic sensor offers the best price to accuracy ratio, and the pressure sensor provides the highest accuracy while still at a very low cost. Our platform and protocol provide a standardised testing and calibration method which can be applied to any sensor. The platform can be used to gather and share results, to enhance community knowledge and encourage the use of new (low-cost or not) sensors. The development of low-cost sensors is an important step toward the wider use monitoring systems for water infrastructure.

show abstract

Section: Comparison Of the Performance Of The Sensors Testedmentioning

confidence: 99%

A platform and protocol to standardise the test and selection low-cost sensors for water level monitoring

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Laser system has been recently developed for water level measurement [10]. A pulse laser rangefinder sensor using phase method was pointing perpendicularly to calm and sloshing water surface for water level detection.…”

Section: Introductionmentioning

confidence: 99%

Economic Floating Waste Detectionfor Surface Cleaning Robots

Sumroengrit

Ruangpayoongsak

2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. Removing waste out of water surface is a routine task and can be operated by using autonomous surface cleaning robots. This paper presents amethodoflaser-based floating waste detection for surface robot guidance when waste positions are unknown beforehand. Basing on concept of refraction and reflection of laser ray, the proposed laser-based technique is proven to be applicable on floating waste detection. The economic waste detector is constructed and mounted on the robot. Five DOF equations of motion are formulated for calculation of waste position incorporating distance measured by the laser and also the robot motion caused by external wind force as well as water surface tension. Experiments were conducted on a pond with calm water and results show that the presented economic waste detection successfully identify and locate position of plastic bottles floating on water surface within the range of 5 meters. IntroducionIn developing countries, accumulation of floating waste such as plastic scraps, foam scraps or tree leaves on city canals or ponds can block water drainage and also cause pollutions. Cleaning water surface is therefore an essential routine task.Surface cleaning robots on lake, pond, or reservoirs gained interests from researchers and issues were addressed such as motion control and autonomous driving. Motion of the robot was represented by hydrodynamic model and maneuver ability performance was predictable [1]. The asymptotic stabilizaion control was also theoretically validated for motion control of the surface robot [2]. As for autonomous driving, bank following algorithm with obstacle avoidance was implemented by using ultrasonic sensors [3]. Later, a low cost robot structure design was presented and simulation of multi robot system for lake cleaning was proposed [4]. The strategy of waste removal in a large area was presented whereas waste is assumed to be randomly distributed but waste position is known. On the other hand, the problem of waste detectionwhen waste position is unknown had not yet been investigated.Laser range finder showed high performance on ocean navigation of unmanned surface vehicles. LIDAR was utilized for obstacle detection and avoidance of obstacle above ocean level for autonomous driving [5][6].The laser scanner is also used for 3D surface reconstruction in which both below and above water level structure were scanned [7].Along with the performance, cost of the laser scanner is high.This work presents a method for identifying and locating waste floating on calm water surface by using a low cost laser system before the cleaning robot starts navigation. A Pan-Tilt laser unit is utilized as a waste detector heading into water surface and scanning for floating waste. When the waste detector is mounted on the robot floating on water surface, external wind force causes three dimensional rotations. Accordingly, waste position can be obtained from five degree of freedom equations of motion. This paper is organized as follows: In section 2, the Floating Waste Removal R...

show abstract

Water Level Monitoring and Flood Warning System using Light Detection and Ranging (LiDAR) Sensor with Hybrid Renewable Solar-Wind Power

Leon

Cruz

2021

2021 IEEE 13th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environ

View full text Add to dashboard Cite

Development of Laser Water Level Measuring System without Cooperative Target

Cited by 3 publications

References 2 publications

A platform and protocol to standardise the test and selection low-cost sensors for water level monitoring

A platform and protocol to standardise the test and selection low-cost sensors for water level monitoring

Economic Floating Waste Detectionfor Surface Cleaning Robots

Water Level Monitoring and Flood Warning System using Light Detection and Ranging (LiDAR) Sensor with Hybrid Renewable Solar-Wind Power

Contact Info

Product

Resources

About