High resolution simultaneous dual liquid level measurement system with CMOS camera and FPGA hardware processor

Lorenz, Michael G.; Mengibar-Pozo, L.; Izquierdo-Gil, M.A.

doi:10.1016/j.sna.2013.08.005

Cited by 10 publications

(9 citation statements)

References 17 publications

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“…This last paper proposes a system architecture implemented on a Xilinx Virtex-6 FPGA to process the obtained images, perform the visual slam, 3D map reconstruction and to obtain the location of the rover at the map. In [ 37 ], a high precision automatic system for liquid level measurement in membrane distillation applications is presented. This approach is based on the laser triangulation principle using two lasers and a camera.…”

Section: Sensors Systems Based On Fpgasmentioning

confidence: 99%

“…Within this topic, one can mention the work described in [ 47 ] where a monitoring infrastructure based on FPGA is proposed. In [ 37 ], a computer vision system is presented for liquid level measurement in membrane distillation applications. Another monitoring system is presented in [ 48 – 50 ].…”

Section: Sensors Systems Based On Fpgasmentioning

confidence: 99%

“…Normally, processing image is embebbed on the FPGA, whereas decision tasks (correspondent to high-level vision tasks) are developed over a conventional processor. In [ 37 ] the FPGA board allows a concurrent operation as the acquisition of the image and the processing of the data can be performed simultaneously. The processing block includes image filtering, threshold level adjustment and edge detection.…”

Section: Computer Vision Systems Based On Fpgasmentioning

confidence: 99%

See 2 more Smart Citations

A Survey on FPGA-Based Sensor Systems: Towards Intelligent and Reconfigurable Low-Power Sensors for Computer Vision, Control and Signal Processing

García

Jara

Pomares

et al. 2014

Sensors

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The current trend in the evolution of sensor systems seeks ways to provide more accuracy and resolution, while at the same time decreasing the size and power consumption. The use of Field Programmable Gate Arrays (FPGAs) provides specific reprogrammable hardware technology that can be properly exploited to obtain a reconfigurable sensor system. This adaptation capability enables the implementation of complex applications using the partial reconfigurability at a very low-power consumption. For highly demanding tasks FPGAs have been favored due to the high efficiency provided by their architectural flexibility (parallelism, on-chip memory, etc.), reconfigurability and superb performance in the development of algorithms. FPGAs have improved the performance of sensor systems and have triggered a clear increase in their use in new fields of application. A new generation of smarter, reconfigurable and lower power consumption sensors is being developed in Spain based on FPGAs. In this paper, a review of these developments is presented, describing as well the FPGA technologies employed by the different research groups and providing an overview of future research within this field.

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Section: Sensors Systems Based On Fpgasmentioning

confidence: 99%

Section: Sensors Systems Based On Fpgasmentioning

confidence: 99%

Section: Computer Vision Systems Based On Fpgasmentioning

confidence: 99%

See 1 more Smart Citation

A Survey on FPGA-Based Sensor Systems: Towards Intelligent and Reconfigurable Low-Power Sensors for Computer Vision, Control and Signal Processing

García

Jara

Pomares

et al. 2014

Sensors

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“…Image processing technique used to compute the level of liquid from the captured image of the container is reported in [6,7]. Measurement of liquid level in a distillation process using a digital camera is discussed in [8]. Paper [9] discusses the technique of liquid level measurement based on the reflective principle of light.…”

Section: Introductionmentioning

confidence: 99%

Design of an Instrument for Liquid Level Measurement and Concentration Analysis Using Multisensor Data Fusion

2020

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This paper presents the design of an instrument for measuring the liquid level. The objective of this proposed work is to measure the level of liquid accurately even with variations in liquid concentration. The designed instrument should also be able to compute the concentration of additives in the liquid. For this purpose, a multisensor model comprising a capacitive level sensor (CLS), ultrasonic level sensor (ULS), and capacitance pressure sensor is used to acquire information of the liquid. The data acquired from all these sensors are processed using Pau’s multisensor data fusion framework to compute the level of liquid along with the concentration of additives added to the solution. Pau’s framework consists of alignment, association function, analysis, and representation functions. The designed multisensor technique is tested with real-life data for varying liquid levels and additives. The results obtained show that the successful implementation of the proposed objective producing a root mean square of percentage error is 1.1% over the full scale is possible.

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“…In addition to that, further studies on robustness, lifetime, and the environmental condition are needed to achieve better processing time of measuring liquid level in the case of turbulent flow [11]. In addition, assisted with a high-resolution 3-Mpixel CMOS camera and a hardware digital image processor implemented in a field-programmable gate array (FPGA), a new high-precision automatic measurement system for liquid-level measurement has been presented in membrane distillation application [13]. The system is simple and low coat compared with a common measurement system.…”

mentioning

confidence: 99%

An Accurate Detection for Dynamic Liquid Level Based on MIMO Ultrasonic Transducer Array

Cai

Shen

et al. 2015

IEEE Trans. Instrum. Meas.

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In many circumstances, the conventional ultrasonic liquid-level detection presents the unreliable estimations due to the dynamically changed liquid level. In addition, there are circumstances where the level change involves not only the fluctuation but also the rise or fall of liquid level. To improve the measuring accuracy of liquid level using the ultrasonic method in dynamically changed level case, an attractive ultrasonic method, named the liquid-level detection based on the multiple-input multiple-output ultrasonic transducer array, is proposed in this paper. This method is different from the early ultrasonic liquidlevel detections, including those that utilize transducer array. Based on the virtual element technology, the method employs the multitransducer array to achieve the reduction of system complexity and cost, and then applies the synthetic aperture technology to realize rapid samples of liquid level. Besides, one adaptive searching scheme of focused position in beamforming of synthetic aperture in each scanning direction is optimized to get the high precise samples of liquid level. The proposed method is verified by simulation and a real system, and compared with the conventional single-channel approach. We still proposed a simulation method of ultrasonic echo signal from liquid level based on the boundary-layer theory and the ultrasonic scattering theory. The simulated and actual measurement results demonstrate that the proposed method is obviously superior to the conventional approach. Meanwhile, the factors influencing on the proposed method are investigated by simulation also. The investigations reveal that the focus position in beamforming, the SNR of echo signal, and the wave size of liquid level have impact on the suggested method. However, it is indicated that the good performance of the proposed method remains, provided that the focus in beamforming is properly set in every scanning direction and the noise of echo signal is effectively controlled.Index Terms-Acoustics, arrays, level measurement, measurement errors, multiple-input multiple-output (MIMO) systems, transducers.

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High resolution simultaneous dual liquid level measurement system with CMOS camera and FPGA hardware processor

Cited by 10 publications

References 17 publications

A Survey on FPGA-Based Sensor Systems: Towards Intelligent and Reconfigurable Low-Power Sensors for Computer Vision, Control and Signal Processing

A Survey on FPGA-Based Sensor Systems: Towards Intelligent and Reconfigurable Low-Power Sensors for Computer Vision, Control and Signal Processing

Design of an Instrument for Liquid Level Measurement and Concentration Analysis Using Multisensor Data Fusion

An Accurate Detection for Dynamic Liquid Level Based on MIMO Ultrasonic Transducer Array

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