scholarly journals High-Precision Fabrication of Micro Monolithic Tungsten Ball Tips via Arc Discharge and the Taguchi Method

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1042
Author(s):  
Zhen-Ying Cheng ◽  
Pan Yao ◽  
Yong-Jun Wang ◽  
Chen Chen ◽  
Li-Juan Chen ◽  
...  
Keyword(s):  
Surface Tension ◽  
Taguchi Method ◽  
Success Rate ◽  
High Precision ◽  
Arc Discharge ◽  
Signal To Noise Ratio ◽  
Large Diameter ◽  
Signal To Noise ◽  
Core Component ◽  
Precision Measuring

A micro ball tip is a core component of high precision coordinate measuring machines. The present micro ball tips cannot satisfy the high-precision measuring requirements of high aspect ratio microstructures due to their large diameter and low accuracy. In the previous study, we fabricated a micro monolithic tungsten ball tip by using arc discharge and surface tension principles. However, the fabrication success rate of forming a micro ball tip is less than 10%. In the present study, the Taguchi method has been applied to increase the fabrication success rate, and it has increased to 57.5%. The output response is evaluated in terms of the diameter, roundness, and center offset of the tungsten probe ball tips. The smaller-the-better signal-to-noise ratio is applied to analyze the influence of various parameters. The proposed parameters can be used to increase the fabrication success rate and accuracy of the monolithic probe ball tip.

Application of Taguchi method in the optimization of geometric parameters for double pin joint configurations made from glass–epoxy nanoclay laminates

2016 ◽  
Vol 51 (19) ◽  
pp. 2689-2706 ◽  
Author(s):  
Manjeet Singh ◽  
J S Saini ◽  
H Bhunia ◽  
Paramdeep Singh
Keyword(s):  
Taguchi Method ◽  
Signal To Noise Ratio ◽  
Characteristic Curve ◽  
Free Edge ◽  
Geometric Parameters ◽  
Signal To Noise ◽  
Bearing Strength ◽  
Significant Parameter ◽  
Numerical Predictions ◽  
Good Agreement

In the present work, Taguchi method was used for the optimization of geometric parameters for double pin joint configurations. The orthogonal array, the signal-to-noise ratio, and analysis of variance were employed to study the effect of geometric parameters on the bearing strength of the joints. Geometric parameters, i.e. the distance from the free edge of the specimen to the diameter of the first hole (E/D) ratio, width of the specimen to the diameter of the hole (W/D) ratio, the distance between the two holes to the diameter of the hole (P/D) ratio and side width to the diameter of the hole (K/D) ratio were investigated for the serial and parallel hole configurations. The results demonstrate that the E/D ratio is the most significant parameter to increase the bearing strength in both serial and parallel pin joint configurations. Its percentage contribution is about 84.5% and 64.23% in serial and parallel pin joint configurations, respectively. Characteristic curve with Tsai–Wu failure criterion was used for the prediction of the bearing strength in the joints numerically. A good agreement was obtained between experimental results and numerical predictions.

Optimization of Reliability Test on the Shell of Portable Electronic Products Based on Taguchi Method

2014 ◽  
Vol 599-601 ◽  
pp. 1021-1024
Author(s):  
Xue Mei Du ◽  
Wei Lei ◽  
Nai Jia Wang ◽  
Jing Yu Ding
Keyword(s):  
Taguchi Method ◽  
Traditional Approach ◽  
Signal To Noise Ratio ◽  
Reliability Test ◽  
Signal To Noise ◽  
Electronic Products ◽  
Long Cycle ◽  
Electronic Product ◽  
New Process ◽  
New Type

Traditional reliability test of electronic products has the feature of many contents, long cycle and rising test fees. This paper analyzes the feasibility of combination of Taguchi method and reliability test. Then, the process of optimizing reliability test is proposed with emphasis on use of Taguchi method such as orthogonal table and signal-to-noise ratio (SNR). Finally, the process is applied to the reliability test on the shell of a new type of portable electronic product developed by C Company, verifying that the new process is operable and can reduce test numbers, time and cost while guaranteeing effectiveness of reliability test compared with the traditional approach.

High precision linear frequency modulation ranging system based on semiconductor laser

2018 ◽  
Vol 32 (11) ◽  
pp. 1850136 ◽  
Author(s):  
Mingyuan Xue ◽  
Cunxiao Gao ◽  
Linquan Niu ◽  
Shaolan Zhu ◽  
Na Guo ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
High Precision ◽  
Frequency Modulation ◽  
Signal To Noise Ratio ◽  
Linear Frequency Modulation ◽  
Repetition Frequency ◽  
Laser Ranging ◽  
Signal To Noise ◽  
Linear Frequency ◽  
Noise Ratio

Based on the linear frequency modulation (LFM) of semiconductor laser, a laser ranging system is built. The ranging precision of the system is about micron dimension with the repetition frequency of 100 kHz and a distance of 1–10 m. We analyzed the ranging precision experimentally. As the bandwidth increases, the ranging precision becomes higher and higher. When the bandwidth is fixed, as the distance increases, the signal-to-noise ratio (SNR) will decrease, which reduces the precision.

Comparison of F o Extraction Methods for High-Precision Voice Perturbation Measurements

1993 ◽  
Vol 36 (6) ◽  
pp. 1120-1133 ◽  
Author(s):  
Ingo R. Titze ◽  
Haixiang Liang
Keyword(s):  
High Precision ◽  
Amplitude Modulation ◽  
Extraction Method ◽  
Signal To Noise Ratio ◽  
Extraction Methods ◽  
Sampling Frequency ◽  
Peak Picking ◽  
Signal To Noise ◽  
Zero Crossing ◽  
Software Implementations

Voice perturbation measures, such as jitter and shimmer, depend on accurate extraction of fundamental frequency (F o ) and amplitude of various waveform types. The extraction method directly affects the accuracy of the measures, particularly if several waveform types (with or without formant structure) are under consideration and if noise and modulation are present in the signal. For frequency perturbation, high precision is defined here as the ability to extract F o to ±0.01% under conditions of noise and modulation. Three F o -extraction methods and their software implementations are discussed and compared. The methods are cycle-to-cycle waveform matching, zero-crossing and peak-picking. Interpolation between samples is added to make the extractions more accurate and reliable. The sensitivity of the methods to different parameters such as sampling frequency, mean F o , signal-to-noise ratio, frequency modulation, and amplitude modulation are explored.

Optimisation of Processing Condition Using Taguchi Method on Warpage for HDPE-Clay Composite

2014 ◽  
Vol 660 ◽  
pp. 28-32 ◽  
Author(s):  
Mohd Halim Irwan Ibrahim ◽  
M.H.A. Manaff ◽  
M.H. Othman ◽  
N. Mustafa ◽  
S.R. Masrol ◽  
...  
Keyword(s):  
Taguchi Method ◽  
Signal To Noise Ratio ◽  
Processing Condition ◽  
Injection Pressure ◽  
Cooling Time ◽  
Screening Tests ◽  
Ratio Analysis ◽  
Signal To Noise ◽  
Melt Temperature ◽  
Injection Speed

Injection molding is one of the most important processes in manufacturing nowadays. Thus, attention must be give towards the optimization of the product defects. Parameters have been chosen by screening tests to improve the process quality. The main purpose of this study is to optimize the processing condition using Taguchi Method on shrinkage for HDPE-Clay specimen. The experiment starts by preparing the mixture between HDPE and clay. Then, screening test is conducted to obtain the parameters. The parameters are melt temperature, injection speed, injection pressure and cooling time. By using the array orthogonal L9 (34), signal to noise ratio and ANOVA were conducted. Based on the S / N ratio analysis, best combination can be produced for warpage (melt temperature: 190°C, injection speed: 40%, injection pressure: 30% and cooling time: 3 seconds). While for ANOVA, melt temperature is most significant with 60.28% for warpage.

Determination of Ditalimfos by Liquid Chromatography

1986 ◽  
Vol 69 (1) ◽  
pp. 117-118
Author(s):  
Joseph H Lesser ◽  
Solomon E Massil ◽  
Itshak Ezra
Keyword(s):  
Liquid Chromatography ◽  
High Precision ◽  
Coefficient Of Variation ◽  
Linear Response ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Ultraviolet Detection ◽  
Bonded Phase ◽  
Liquid Chromatographic

Abstract A liquid chromatographic (LC) method for the determination of ditalimfos, 0,0-diethyI phthalimidophosphonothioate, is described. Bonded phase high precision LC using a mixture of n-hexane and chloroform as eluant afforded a capacity factor (k') of 2.3 for the analyte. Ditalimfos could be detected at 0.5 ppm (signal to noise ratio > 3) using ultraviolet detection at 254 nm. The detector afforded a linear response from 0.2 to 10.9 mg/mL when 10 μL of solution was injected and the coefficient of variation was ±0.5%. Structurally related fungicides and several common insecticides were successfully separated from the analyte under the chromatographic conditions of analysis.

High-precision image-drift-correction method for EM images with a low signal-to-noise ratio

Microscopy ◽  
2014 ◽  
Vol 63 (4) ◽  
pp. 301-312 ◽  
Author(s):  
Shigeto Isakozawa ◽  
Sachihiko Tomonaga ◽  
Takahito Hashimoto ◽  
Norio Baba
Keyword(s):  
High Precision ◽  
Signal To Noise Ratio ◽  
Correction Method ◽  
Signal To Noise ◽  
Drift Correction ◽  
Noise Ratio

Optimization of Micro Wind Turbine for Dental Fiber Handpiece Based on the Taguchi Method

2012 ◽  
Vol 605-607 ◽  
pp. 401-404
Author(s):  
Kuang Hung Hsien ◽  
Shyh Chour Huang
Keyword(s):  
Fluid Dynamics ◽  
Electromagnetic Field ◽  
Taguchi Method ◽  
Wind Turbine ◽  
Fill Factor ◽  
Signal To Noise Ratio ◽  
Field Analysis ◽  
Halogen Lamp ◽  
Signal To Noise ◽  
Turbine Design

This paper presents the use of the Taguchi method, Computational-Fluid-Dynamics and electromagnetic field analysis to optimize the design of a micro wind turbine for a dental fiber handpiece. An orthogonal array, the signal-to-noise ratio and analysis of variance were used to study the multiple-objectives in the micro wind turbine design. The results showed that: (1) the wire slot fill factor and stator angle have a significant influence on the flow rate, whereas wire slot fill factor and inlet dimensions have a significant effect on the pressure drop; (2) the micro wind turbine reduces electricity usage by 25 watts in a day and produces brightness of 20,000-23,000 lux. The proposed design of the micro wind turbine not only saves energy but also reduces the need for replacement halogen lamp.

Taguchi Optimization to Determine Optimal Denier of the Polyester Fibre

2014 ◽  
Vol 472 ◽  
pp. 688-692
Author(s):  
Shu Wen Wang ◽  
Te Li Su
Keyword(s):  
Taguchi Method ◽  
Melt Spinning ◽  
Signal To Noise Ratio ◽  
Polyester Fibre ◽  
Synthetic Fiber ◽  
Signal To Noise ◽  
Taguchi Optimization ◽  
Spinning Process ◽  
Quality Deviation ◽  
Significant Factors

Polyester fibre is the synthetic fiber made with man-made fibers. Its surface is smooth with the texture of fine linen. It has good flexibility and durability and is the best non-iron fibres. In order to promote the accuracy and reduce the quality deviation of melt spinning, the Taguchi method was adopted in the melt spinning process. The aim of the research is to enhance the optimization of the melt spinning process using the material polyester. First, the Taguchi method is applied to establish the design of experiment. An analysis of variance will be done to arrive at the significant factors that influence the melt spinning quality the most. Lastly, confirmation experiments verified the reproducibility of this experiment. Confirmed by the experiments, results showed that the obtained SN ratios were greater than the signal-to-noise ratio of nine orthogonal array experiments and this means the experiment is reliable.

Sign in / Sign up

Export Citation Format

Share Document