scholarly journals Detection methods for springback of assembled camshaft under hydraulic expansion

2021 ◽  
Vol 2125 (1) ◽  
pp. 012026
Author(s):  
Zhiwei Gao ◽  
Lianfa Yang ◽  
Jianping Ma ◽  
Chenchen Don ◽  
Xu Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Detection Method ◽  
Elastic Recovery ◽  
Low Cost ◽  
Tube Hydroforming ◽  
Advanced Technology ◽  
Detection Methods ◽  
Element Simulation ◽  
Strain Detection ◽  
Great Development

Abstract The assembled camshaft under hydraulic expansion has the advantages of low cost, lightweight and high performance, which is an advanced technology with great development potential. By applying the tube hydroforming to the fabrication of assembled camshaft, the expansion principle is due to the different degrees of resilience of the cam and the shaft. Therefore, the effective detection method of elastic recovery of camshaft is of great significance to research how to improve the connection strength of the assembled camshaft. This paper introduces several springback detection methods for assembled camshaft under hydraulic expansion, namely resistance strain detection method, gap dynamic detection method and finite element simulation.

Fast and Efficient Mutation Detection Method Using Multiplex PCR and Cycle Sequencing

2000 ◽  
Vol 83 (02) ◽  
pp. 244-247 ◽  
Author(s):  
J. M. Costa ◽  
P. Ernault ◽  
D. Vidaud ◽  
M. Vidaud ◽  
D. Meyer ◽  
...  
Keyword(s):  
Multiplex Pcr ◽  
Mutation Detection ◽  
Detection Method ◽  
Deleterious Mutation ◽  
Low Cost ◽  
Detection Methods ◽  
Cycle Sequencing ◽  
Haemophilia B ◽  
Mild Haemophilia

SummaryA method using multiplex PCR followed by cycle-sequencing has been developed to detect mutations in the FIX gene. The procedure was evaluated in 45 severe or mild haemophilia B patients from 45 unrelated families. At least one deleterious mutation was identified in every haemophiliac demonstrating the efficiency of the method. Furthermore the described procedure offers many advantages compared to other screening detection methods: it is fast (less than 48 h), simple (partly automated) and of relatively low cost (it requires only one PCR).

scholarly journals Analysis of the Effects of Arc Volt–Ampere Characteristics on Different Loads and Detection Methods of Series Arc Faults

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 323 ◽  
Author(s):  
Qiwei Lu ◽  
Zeyu Ye ◽  
Yilei Zhang ◽  
Tao Wang ◽  
Zhixuan Gao
Keyword(s):  
Fault Detection ◽  
Research And Development ◽  
Hardware Implementation ◽  
Detection Method ◽  
Low Cost ◽  
Experimental Methods ◽  
Experimental Results ◽  
National Standard ◽  
Detection Methods ◽  
The Relationship

Owing to the shortcomings of existing series arc fault detection methods, based on a summary of arc volt–ampere characteristics, the change rule of the line current and the relationship between the voltage and current are deeply analyzed and theoretically explained under different loads when series arc faults occur. A series arc fault detection method is proposed, and the software flowchart and principles of the applied hardware implementation are given. Finally, a prototype of an arc fault detection device (AFDD) with a rated voltage of 220 V and a rated current of 40 A is developed. The prototype was tested according to experimental methods provided by the Chinese national standard, GB/T 31143-2014. The experimental results show that the proposed detection method is simple and practical, and can be implemented using a low-cost microprocessor. The proposed method will provide good theoretical guidance in promoting the research and development of an AFDD.

scholarly journals Arching Detection Method of Slab Track in High-Speed Railway Based on Track Geometry Data

2020 ◽  
Vol 10 (19) ◽  
pp. 6799
Author(s):  
Zhuoran Ma ◽  
Liang Gao ◽  
Yanglong Zhong ◽  
Shuai Ma ◽  
Bolun An
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Detection Method ◽  
Low Cost ◽  
Detection Methods ◽  
Data Conversion ◽  
Track Geometry ◽  
Slab Track ◽  
Detection Model ◽  
Characteristics Analysis

During the long-term service of slab track, various external factors (such as complicated temperature) can result in a series of slab damages. Among them, slab arching changes the structural mechanical properties, deteriorates the track geometry conditions, and even threatens the operation of trains. Therefore, it is necessary to detect slab arching accurately to achieve effective maintenance. However, the current damage detection methods cannot satisfy high accuracy and low cost simultaneously, making it difficult to achieve large-scale and efficient arching detection. To this end, this paper proposed a vision-based arching detection method using track geometry data. The main works include: (1) data nonlinear deviation correction and arching characteristics analysis; (2) data conversion and augmentation; (3) design and experiments of convolutional neural network- based detection model. The results show that the proposed method can detect arching damages effectively, and the F1-score reaches 98.4%. By balancing the sample size of each pattern, the performance can be further improved. Moreover, the method outperforms the plain deep learning network. In practice, the proposed method can be employed to detect slab arching and help to make maintenance plans. The method can also be applied to the data-based detection of other structural damages and has broad prospects.

scholarly journals Design of a new rotary dobby mechanism

2019 ◽  
Vol 69 (06) ◽  
pp. 429-433
Author(s):  
CAN ÖZGÜN ◽  
ABDULLA GABİL
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Advanced Technology ◽  
Drive Mechanism ◽  
Design And Synthesis ◽  
Working Performance ◽  
Experimental Values ◽  
The Cost ◽  
Selection Mechanisms ◽  
Oscillating Motion

Special cam mechanisms which require advanced technology are used in the drive mechanism of nowadays rotary dobbies. Electromagnets are generally preferred in the selection mechanisms which increase the cost of production and make the maintenance more difficult. This work aims to design a new rotary dobby different from the other dobbies. First of all, the design and synthesis of a new drive mechanism with eight members, equal and double standby at 180° oscillating motion was developed. The results of the research revealed that both the theoretical and the experimental values of the waiting angles of drive mechanism are compatible with each other. Thus, it has been proposed that designed mechanism can be used instead of the special cams mechanisms in the rotary dobbies. Pneumatic pistons and locks have been used in the selection mechanism of rotating dobby developed in the study. During the performence tests, it has been observed that the pneumatic piston and locks can be used instead of the electromagnets by providing that they work in harmony with each other. As a conclusion, when the working performance of dobby was observed, it was confirmed that dobby worked with a high performance and durably with all of its mechanisms. Additionally the shedding process was precisely carried out. Finally a new rotary dobby which was easy to construct with low cost has been designed and produced.

Research of New Ultrasonic Domestic Gas Meter

2013 ◽  
Vol 760-762 ◽  
pp. 1136-1138
Author(s):  
Shun Zhou ◽  
Xiao Jing Li ◽  
Su Qing Xue
Keyword(s):  
High Performance ◽  
Simple Structure ◽  
Liquid Velocity ◽  
Low Cost ◽  
Rapid Development ◽  
Ultrasonic Flowmeter ◽  
Advanced Technology ◽  
Reliable Test ◽  
Velocity Information ◽  
Good Repeatability

In recent years, with the rapid development of science and technology, the ultrasonic flowmeter has been widely applied. It measures the flow of liquid by using the liquid velocity information of the ultrasonic transmits in the liquid. The advantages of the meter are non-contact, no pressure loss, low cost, simple structure, wide measuring scope. In this paper, by absorbing and referring to the domestic and foreign advanced technology, the author developed an ultrasonic domestic gas meter based on transit-time difference method and MSP430.And it can measure fluid flow accurately. Experiments show that the system is stable and reliable, test data has good repeatability. The system lays a good foundation in developing the high-performance ultrasonic flowmeter in the future.

Finite Element Simulation of a Novel Nano 3D Semiconductor Detector Fabricated by Anodizing the Aluminium

2013 ◽  
Vol 829 ◽  
pp. 212-216
Author(s):  
Fatemeh Esfandi ◽  
Shahyar Saramad ◽  
Mohammad Amin Jalilvand
Keyword(s):  
High Performance ◽  
Semiconductor Detector ◽  
Low Cost ◽  
Hadron Collider ◽  
Semiconductor Detectors ◽  
Silicon Detectors ◽  
Element Simulation ◽  
Planar Silicon ◽  
Full Depletion ◽  
Radiation Hard

The unique geometry of micro 3D semiconductor detectors, presents several advantages over conventional planar silicon detectors. But, manufacturing these kind of detectors requires high technology. The novel idea to achieve a high performance and low cost semiconductor detector is using the nanopattern of anodized aluminium as a mask to create nano3D detectors. The simulation results show that this novel nano3D radiation hard semiconductor detector with collection time less than 10 ps and full depletion voltage less than one volt can become increasingly important for possible future upgrades of 3D detectors of the Large Hadron Collider (LHC) at CERN and also medical imaging applications.

scholarly journals Evaluation of accurate eye corner detection methods for gaze estimation

2014 ◽  
Vol 7 (3) ◽  
Author(s):  
Jose Javier Bengoechea ◽  
Juan J. Cerrolaza ◽  
Arantxa Villanueva ◽  
Rafael Cabeza
Keyword(s):  
Neural Network ◽  
High Performance ◽  
Low Cost ◽  
Corner Detection ◽  
Detection Methods ◽  
Gaze Estimation ◽  
Harris Corner ◽  
Feature Based ◽  
Harris Corner Detector ◽  
Iris Center

Accurate detection of iris center and eye corners appears to be a promising approach for low cost gaze estimation. In this paper we propose novel eye inner corner detection methods. Appearance and feature based segmentation approaches are suggested. All these methods are exhaustively tested on a realistic dataset containing images of subjects gazing at different points on a screen. We have demonstrated that a method based on a neural network presents the best performance even in light changing scenarios. In addition to this method, algorithms based on AAM and Harris corner detector present better accuracies than recent high performance face points tracking methods such as Intraface.

scholarly journals A Hadamard transform UV absorption detection for high performance liquid chromatography. Part I. Preliminary experiments

1995 ◽  
Vol 17 (2) ◽  
pp. 77-82 ◽  
Author(s):  
J. G. Brayan ◽  
D. J. Malcolme-Lawes ◽  
C. D. Mew ◽  
S. Xie
Keyword(s):  
Liquid Chromatography ◽  
Aromatic Compounds ◽  
High Performance ◽  
Detection Method ◽  
Low Cost ◽  
Flow Cell ◽  
Hadamard Transform ◽  
Uv Absorbance ◽  
Multi Wavelength ◽  
Wavelength Detection

The principles and design of a Hadamard transform UV absorbance detector for liquid chromatography are outlined, and some spectra of aromatic compounds passing through its flow cell are presented. This approach could be valuable in providing a low-cost multi-wavelength detection method for liquid chromatography.

Sign in / Sign up

Export Citation Format

Share Document