scholarly journals Validity of Bench Test Method for Infrared Flame Detector

2021 ◽  
Vol 35 (1) ◽  
pp. 150-155
Author(s):  
Jong-Jin Jung
Keyword(s):  
Light Output ◽  
Test Method ◽  
Optical Characteristics ◽  
Bench Test ◽  
Improve Product Quality ◽  
Actual Distance ◽  
Ir Sensor ◽  
Flame Detector ◽  
Output Characteristics ◽  
Range Test

In this study, the validity of an indoor bench test to replace and overcome the limitations of the real-range test, an infrared flame detector sensitivity test, was analyzed. A micro burner (diameter 6 mm) was used to substitute for the infrared flame detector. In order to measure the amount of light by distance, the voltage at the output end of the IR sensor was acquired. In addition, normal heptane (n-heptane) was used as a fuel for the actual distance experiment, and the amount of light at each distance was measured using an IR sensor. A bench tester was developed to measure the light output characteristics of infrared flame detectors by distance inside, and the actual distance optical characteristics from outside were measured and compared. As a result, both methods were able to confirm the same optical characteristics by distance. This study confirmed the validity of the bench test method conducted inside, which can replace the experiment at the actual distance conducted to confirm the performance of the infrared flame detector. If this test method is used in the future, it is believed the flame detector will improve product quality and development.

Modeling and Simulation of Engine Power Based on MATLAB/SIMULINK

2014 ◽  
Vol 875-877 ◽  
pp. 929-933 ◽  
Author(s):  
Hui Meng ◽  
Li Qiang Wang ◽  
Zong Qi Han ◽  
Shu Bin Lei
Keyword(s):  
Modeling And Simulation ◽  
Bench Test ◽  
Matlab Simulink ◽  
Engine Modeling ◽  
Simulation Process ◽  
Fuel Dynamics ◽  
Model Engine ◽  
Output Characteristics ◽  
Actual Control ◽  
Engine Power

The intake system sub-model, the fuel dynamics sub-model and the power output sub-model are studied in this paper based on Elbert Hendricks engine mean model. Engine output characteristics using computational model is established in MATLAB/Simulink. Parameter of the modeling and simulation process is obtained through experiments, and finally, the engine bench test is done, and compared it with the simulation curve in same conditions. The results show that the model calculation has smaller error, higher precision, and which can meet the basic requirements of the engine modeling in actual control.

scholarly journals Light Extraction Enhancement of InGaN Based Micro Light-Emitting Diodes with Concave-Convex Circular Composite Structure Sidewall

2019 ◽  
Vol 9 (17) ◽  
pp. 3458 ◽  
Author(s):  
Tan ◽  
Zhou ◽  
Hu ◽  
Wang ◽  
Yao
Keyword(s):  
Composite Structure ◽  
Inductively Coupled Plasma ◽  
Total Internal Reflection ◽  
Light Emitting Diodes ◽  
Light Output ◽  
Electrical Characteristics ◽  
Light Emitting ◽  
Inductively Coupled ◽  
Icp Etching ◽  
Output Characteristics

We demonstrate that the concave-convex circular composite structure sidewall prepared by inductively coupled plasma (ICP) etching is an effective approach to increase the light efficiency without deteriorating the electrical characteristics for micro light-emitting diodes (LEDs). The saturated light output power of the device using the concave-convex circular composite structure sidewalls with a radius of 2 μm is 39.75 mW, an improvement of 7.2% compared with that of the device using flat sidewalls. The enhanced light output characteristics are primarily attributed to the increased photon emitting due by decreasing the total internal reflection without losing the active region area.

scholarly journals Multi-Domain Modelling of LEDs for Supporting Virtual Prototyping of Luminaires

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1909 ◽  
Author(s):  
András Poppe ◽  
Gábor Farkas ◽  
Lajos Gaál ◽  
Gusztáv Hantos ◽  
János Hegedüs ◽  
...  
Keyword(s):  
Thermal Environment ◽  
Light Emitting Diode ◽  
Virtual Prototyping ◽  
Multiple Quantum Well ◽  
Light Output ◽  
Operating Conditions ◽  
Domain Model ◽  
Multiple Quantum ◽  
Seamless Integration ◽  
Output Characteristics

This paper presents our approaches to chip level multi-domain LED (light emitting diode) modelling, targeting luminaire design in the Industry 4.0 era, to support virtual prototyping of LED luminaires through luminaire level multi-domain simulations. The primary goal of such virtual prototypes is to predict the light output characteristics of LED luminaires under different operating conditions. The key component in such digital twins of a luminaire is an appropriate multi-domain model for packaged LED devices that captures the electrical, thermal, and light output characteristics and their mutual dependence simultaneously and consistently. We developed two such models with this goal in mind that are presented in detail in this paper. The first model is a semi analytical, quasi black-box model that can be implemented on the basis of the built-in diode models of spice-like circuit simulators and a few added controlled sources. Our second presented model is derived from the physics of the operation of today’s power LEDs realized with multiple quantum well heterojunction structures. Both models have been implemented in the form of visual basic macros as well as circuit models suitable for usual spice circuit simulators. The primary test bench for the two circuit models was an LTspice simulation environment. Then, to support the design of different demonstrator luminaires of the Delphi4LED project, a spreadsheet application was developed, which ensured seamless integration of the two models with additional models representing the LED chips’ thermal environment in a luminaire. The usability of our proposed models is demonstrated by real design case studies during which simulated light output characteristics (such as hot lumens) were confirmed by luminaire level physical tests.

The CRC Port Fuel Injector Bench Test Method, Interlaboratory Study, and Vehicle Test Correlation

1999 ◽  
Author(s):  
Martin Megnin ◽  
Beth Evans ◽  
Don Koehler ◽  
Karen Kohl ◽  
John Naylon
Keyword(s):  
Test Method ◽  
Interlaboratory Study ◽  
Bench Test ◽  
Fuel Injector ◽  
Vehicle Test ◽  
Test Correlation

Testing of riveting hammers (formation of the bench technique)

2021 ◽  
pp. 20-29
Author(s):  
V.S. Vanaev
Keyword(s):  
Test Bench ◽  
Test Procedure ◽  
Test Method ◽  
Bench Test ◽  
The Real ◽  
Testing Tools ◽  
Real Work

An overview of the principal schemes and designs of testing tools for handheld impact machines, such as riveting hammers, is given. The formation of a bench test method for riveting hammers is considered, which most objectively reproduces the real work of a manual machine when processing an object with a riveting hammer, including with the help of support. Keywords: hand-held machine, riveting hammer, support, test bench, test procedure, processed package, rivet, characteristics of hand-held machine. [email protected]

Virtual Fatigue Test of Auto Parts Based on Non-Structural Road Driving Simulation

2010 ◽  
Vol 34-35 ◽  
pp. 595-599
Author(s):  
Nan Cong ◽  
Xun Chen ◽  
Jian Zhong Shang ◽  
Ke Shan Liang
Keyword(s):  
Fatigue Life ◽  
Fatigue Test ◽  
Rear Axle ◽  
Test Method ◽  
Design Parameters ◽  
Bench Test ◽  
Vehicle Design ◽  
Virtual Test ◽  
Auto Parts ◽  
Real Vehicle

Non-Structural road driving test is a key part of fatigue and durability tests for vehicles such as the construction machines and ATVs. Combining a theoretic road-tyre dynamic model with some real vehicle design parameters, the responses of the wheel axle under different non-structural road conditions were estimated conveniently. The responses can be taken as inputs for a virtual test-rig simulation, and the responses of every part on the test object are obtained separately. Fatigue life is predicted under the finite element circumstance, and the reliability and durability are concluded. Comparing with the real road-driving test, the virtual fatigue test method above can significantly reduce the test period. This method is used to predict the fatigue life of the rear axle-housing in construction machines, the accuracy of the method is verified by a corresponding real bench test.

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