scholarly journals Design of an Integrated Anti-Hardening System for Carbon-In-Leach Tanks

2019 ◽  
Vol 19 (2) ◽  
pp. 64-69
Author(s):  
R. A. Ofosu ◽  
E. Normanyo ◽  
B. Essilfie-Nyame
Keyword(s):  
Pressure Sensor ◽  
Strain Gauge ◽  
Light Emitting Diode ◽  
Density Measurement ◽  
Monitoring Systems ◽  
Light Emitting ◽  
Set Point ◽  
Gauge Pressure ◽  
Hardening System ◽  
Level Sensors

Slurry density monitoring is of paramount importance in the industrial world. Most industries, especially cement and mineral processing industries, employ this method to obtain good quality products. However, most Carbon-In-Leach (CIL) tanks of gold processing industries do not use slurry density monitoring systems. As a result, many a time, agitation difficulties occur when the slurry begins to harden. This paper, therefore, seeks to design an integrated anti-hardening system for CIL tanks, with the aid of a microcontroller, to monitor the density of the slurry in order to prevent it from hardening. Slurry density measurement was achieved with the help of a strain gauge pressure sensor and a couple of level sensors. Atmega 328p  microcontroller board was programmed to continuously compute the density of the slurry from values of pressure and level of slurry in the tank indicated by the pressure and level sensors, respectively. The microcontroller responds to slurry hardening by activating a light emitting diode and triggering the piezo buzzer when a set point is reached. The designed circuit was successfully simulated using Proteus 8.2 design suite software to ascertain its functionality. Based on the results obtained, the light emitting diode and piezo buzzer activated when the set point was reached. It was concluded that the anti-hardening system is effective for constantly monitoring the density of the slurry to prevent it from hardening. It was also recommended that the mining industries could employ the designed system to monitor the density in order to prevent hardening of slurry in CIL tanks. Keywords: Carbon-In-Leach Tanks, Slurry Densisty, Strain Guage Pressure Sensor, Microcontroller

Metal Strain Gauge Pressure Sensor Using SiO2/Si3N4 Diaphragm

2019 ◽  
Vol 139 (4) ◽  
pp. 63-68
Author(s):  
Hiroshi Nakano ◽  
Masahiro Matsumoto ◽  
Yasuo Onose ◽  
Kazuhiro Ohta
Keyword(s):  
Pressure Sensor ◽  
Strain Gauge ◽  
Gauge Pressure ◽  
Metal Strain

scholarly journals Pinhole microLED Array as Point Source Illumination for Miniaturized Lensless Cell Monitoring Systems

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 866 ◽  
Author(s):  
Shinta Mariana ◽  
Gregor Scholz ◽  
Feng Yu ◽  
Agus Budi Dharmawan ◽  
Iqbal Syamsu ◽  
...  
Keyword(s):  
Image Quality ◽  
Light Emitting Diode ◽  
Free Cell ◽  
Monitoring Systems ◽  
Label Free ◽  
Light Emitting ◽  
Non Invasive ◽  
Cell Monitoring ◽  
Blue Spectral Region ◽  
Led Arrays

Pinhole‐shaped light‐emitting diode (LED) arrays with dimension ranging from 100 μm down to 5 μm have been developed as point illumination sources. The proposed microLED arrays, which are based on gallium nitride (GaN) technology and emitting in the blue spectral region (λ = 465 nm), are integrated into a compact lensless holographic microscope for a non‐invasive, label‐free cell sensing and imaging. From the experimental results using single pinhole LEDs having a diameter of 90 μm, the reconstructed images display better resolution and enhanced image quality compared to those captured using a commercial surface‐mount device (SMD)‐based LED.

scholarly journals Seeing pressure in color based on integration of highly sensitive pressure sensor and emission tunable light emitting diode

2019 ◽  
Vol 27 (24) ◽  
pp. 35448 ◽  
Author(s):  
Tien-Lin Shen ◽  
Chien-Tung Chen ◽  
Yu-Kuang Liao ◽  
Teng-Yu Su ◽  
Che-Yu Liu ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Highly Sensitive ◽  
Sensitive Pressure

Wearable and visual pressure sensors based on Zn2GeO4@polypyrrole nanowire aerogels

2017 ◽  
Vol 5 (42) ◽  
pp. 11018-11024 ◽  
Author(s):  
Jie Xue ◽  
Jiawei Chen ◽  
Jizhong Song ◽  
Leimeng Xu ◽  
Haibo Zeng
Keyword(s):  
Pressure Sensor ◽  
High Performance ◽  
Light Emitting Diode ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Light Emitting

A high-performance and tailorable pressure sensor based on the Zn2GeO4@PPy nanowire aerogel for applications in visual and wearable fields has been developed and show high sensitivity of the pressure sensor (0.38 kPa−1at pressure regions less than 1.5 kPa). We also combined the aerogels with Light Emitting Diode which make a visible sensor come true.

Synchronization of Chaotic Quantum Dot Light Emitting Diodes under Optical Feedback Effect

2020 ◽  
pp. 144-148
Keyword(s):  
Quantum Dot ◽  
Delay Time ◽  
Chaos Synchronization ◽  
Optical Feedback ◽  
Light Emitting Diode ◽  
Feedback Effect ◽  
Complete Synchronization ◽  
Light Emitting ◽  
Coupling Methods ◽  
Coupling Parameters

Chaos synchronization of delayed quantum dot light emitting diode has been studied theortetically which are coupled via the unidirectional and bidirectional. at synchronization of chaotic, The dynamics is identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time the system exhibits complete synchronization, . Under proper conditions, the receiver quantum dot light emitting diode can be satisfactorily synchronized with the transmitter quantum dot light emitting diode due to the optical feedback effect.

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