Calcium sparks in muscle cells: interactive procedures for automatic detection and measurements on line-scan confocal images series

2005 ◽  
Vol 77 (1) ◽  
pp. 57-70 ◽  
Author(s):  
S. Sebille ◽  
A. Cantereau ◽  
C. Vandebrouck ◽  
H. Balghi ◽  
B. Constantin ◽  
...  
Keyword(s):  
Automatic Detection ◽  
Muscle Cells ◽  
Calcium Sparks ◽  
Line Scan ◽  
On Line ◽  
Confocal Images ◽  
Interactive Procedures

scholarly journals Amplitude Distribution of Calcium Sparks in Confocal Images: Theory and Studies with an Automatic Detection Method

1999 ◽  
Vol 76 (2) ◽  
pp. 606-617 ◽  
Author(s):  
Heping Cheng ◽  
Long-Sheng Song ◽  
Natalia Shirokova ◽  
Adom González ◽  
Edward G. Lakatta ◽  
...  
Keyword(s):  
Detection Method ◽  
Automatic Detection ◽  
Amplitude Distribution ◽  
Calcium Sparks ◽  
Confocal Images

On-Line Measuring Principle of Ferrous Ion in Fluxing

2010 ◽  
Vol 34-35 ◽  
pp. 1810-1815
Author(s):  
An Du ◽  
Rui Na Ma ◽  
Yong Zhe Fan ◽  
Xiao Ming Cao ◽  
Shi Jie Li ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Linear Equations ◽  
Automatic Detection ◽  
Ferrous Ion ◽  
Spectral Absorption ◽  
Ferrous Ions ◽  
Micro Pump ◽  
On Line

A spectral absorption of the ferrous ion in fluxing was investigated in this paper due to the significant effect of ferrous ion on the quality of hot-dip galvanizing production. Based on analysis of spectrophotometry, an automatic detection equipment of ferrous ions is developed according to its special characteristics. On-line measuring of ferrous ion in fluxing of the hot-dip galvanizing is realized by the micro-pump and the equipment. Results show that the lowest limit to be detected is 0.1 g/L, measuring errors are less than 0.05 g/L, the linear equations of the absorption and concentration of the ferrous ions shows a good correlation coefficient which is 0.99995 when the ferrous ions concentration is between 0.1g/L and 10g/L in fluxing.

A Rail Mounted Ultrasonic Sensor for Contact Patch Measurement

2008 ◽  
Author(s):  
R. S. Dwyer-Joyce ◽  
R. Lewis ◽  
B. W. Drinkwater ◽  
J. Zhang ◽  
C. Yao
Keyword(s):  
High Stress ◽  
Measurement Procedure ◽  
Field Trials ◽  
Ultrasonic Pulse ◽  
Lateral Loads ◽  
Contact Patch ◽  
Line Scan ◽  
Array Transducer ◽  
On Line ◽  
Array Measurement

Failure of a wheel/rail contact is usually by wear or fatigue and both of these depend on the size and location of the contact patch. One contact measuring approach that shows promise is by the use of ultrasonic reflection. If the wheel and rail surfaces make contact and are under high stress they are more likely to transmit an ultrasonic pulse. However, if there is no contact or the contact is under low stress then the wave is completely or partially reflected. By measuring the proportion of the wave reflected it is possible to deduce the extent of the contact area and also estimate the pressure distribution. In previous work [1] static specimens of wheel and rail were measured by scanning a transducer to build up a 2D map of the contact. Whilst this produced good results and agreed well with contact modeling, it is a time consuming process (typically takes 30 minutes for a scan) and could in no way be used for the measurement on-line. In this paper we describe a method that potentially could be used at line speeds and so provide wheel rail contact measurements in field trials. The 2D scan is achieved by using an array transducer that performs a simultaneous line scan. This coupled with the speed of travel of the contact patch over the sensor location can achieve a map of the contact. Specimens were cut from wheel and rail sections and loaded together hydraulically in a biaxial frame. An array transducer was mounted beneath the rail specimen. The array transducer consisted of 64 ultrasonic elements that may be pulsed independently, simultaneously, or with controlled phase difference. In this work all transducers were pulsed simultaneously at repetition rates of 20 kHz. The signals were reflected back from the contact to effectively produce a line scan. The transducer was physically moved, to simulate the translation of the contact patch and so generate a series of reflection profiles. Contacts under a range of normal and lateral loads have been measured and compared with some simple results using pre-inked paper. The paper concludes with a discussion of how this array measurement procedure might be implemented at full line sped and what accuracy could potentially be achieved.

A new automatic and interactive tree ring measurement system based on a line scan camera

1992 ◽  
Vol 68 (1) ◽  
pp. 138-141 ◽  
Author(s):  
Régent Guay ◽  
Réjean Gagnon ◽  
Hubert Morin
Keyword(s):  
Image Processing ◽  
High Resolution ◽  
Tree Ring ◽  
Measurement System ◽  
Analysis Techniques ◽  
Image Processing And Analysis ◽  
Line Scan ◽  
Computerized Image Processing ◽  
On Line ◽  
High Resolution Images

A new automatic tree ring measurement system which uses computerized image processing and analysis techniques is presented. It is based on a line scan camera instead of a conventional TV camera so it can give high resolution images over long paths (many centimeters). On-line ring validation is possible by comparison with those on other radii. Also, the system is highly interactive so its decisions can be modified by the operator.

Design of On-Line Detection System for Paper Defects Based on Line-Scan Camera

2014 ◽  
Vol 536-537 ◽  
pp. 268-271
Author(s):  
Ping He ◽  
Chao Liu ◽  
Meng Wang ◽  
Sheng Mei Cao
Keyword(s):  
High Efficiency ◽  
Detection System ◽  
Low Cost ◽  
Digital Camera ◽  
Line Detection ◽  
Detection Scheme ◽  
Line Scan ◽  
On Line ◽  
Increasing Demand ◽  
Technology Level

Paper defects mean that there are some defects in the paper such as hole, emboss, and fold during the paper production, which mainly results from the limitation of technological level. In the past time, artificial visual inspection and off-line checking were often used to detect the paper defects. However, its shortcoming was highlighted along with the improvement of industrial technology level and increasing demand for paper. In order to realize the online detection and markers for paper defects, the project designs the on-line detection system based on line-scan digital camera. Firstly, the principle and detection scheme of the system for the paper defects was presented. Then the overall structure of the system was designed. After that, the hardware circuit of the system was designed using TMS320F2812 as main control chip. It mainly consists of the function of each module and the working process of the system. Finally, the software of the image acquisition system was presented. With the experimental verification, the system has advantages of low cost, high efficiency and strong resistance to interference. The functions and indexes achieved the design requirements.

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