Investigate the Method on Measurement Transparence of Tissue Engineered Cornea

With the development of construction tissue engineered cornea by using biomaterials and seed cells,how to measurement transparence of tissue engineered cornea need to be solved. Purpose of the paper is bringing forward a new method to measurement transparence of tissue engineered cornea. According to the definition of corneal transparence, a beam of light is divided into equal two beams of light by spectroscope. In which a beam of light pass through cornea. Ratio of light energy flow that light passed cornea and the other one is calculated. The usual optical and measuring instruments were used, such as sensors for illumination and Data acquisition (DAQ) card. The real-time measuring device for corneal transparence is designed and implemented. The method and device are effective to real-time measurement of tissue engineered cornea transparence through the elements analysis and experiment.

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Real-time measurement and analysis of energy flow in Stirling-type pulse tube refrigerator

International Journal of Thermal Sciences ◽

10.1016/j.ijthermalsci.2014.11.027 ◽

2015 ◽

Vol 90 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Taekyung Ki ◽

Sangkwon Jeong

Keyword(s):

Real Time ◽

Energy Flow ◽

Time Measurement ◽

Pulse Tube ◽

Pulse Tube Refrigerator ◽

Real Time Measurement ◽

Measurement And Analysis

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An Embedded Sensor System for Real-Time Detecting 5-DOF Error Motions of Rotary Stages

Sensors ◽

10.3390/s19132855 ◽

2019 ◽

Vol 19 (13) ◽

pp. 2855 ◽

Cited By ~ 8

Author(s):

Zhi-Feng Lou ◽

Xiu-Peng Hao ◽

Yin-Di Cai ◽

Tien-Fu Lu ◽

Xiao-Dong Wang ◽

...

Keyword(s):

Real Time ◽

Geometric Error ◽

Sensor System ◽

Measuring Instruments ◽

Rotational Angle ◽

Measuring Device ◽

Radial Error ◽

Real Time Measurement ◽

Rotary Stage ◽

External Forces

The geometric error motions of rotary stages greatly affect the accuracy of constructed machines such as machine tools, measuring instruments, and robots. In this paper, an embedded sensor system for real-time measurement of two radial and three angular error motions of a rotary stage is proposed, which makes use of a rotary encoder with multiple scanning heads to measure the rotational angle and two radial error motions and a miniature autocollimator to measure two tilt angular errors of the axis of rotation. The assembly errors of the grid disc of the encoder and the mirror for autocollimator are also evaluated and compensated. The developed measuring device can be fixed inside the rotary stage. In the experiments, radial error motions of two points on the axis (h = 5 mm and 60 mm) were measured and calibrated with LVDTs, and the data showed that the radial error motions of the axis were less than 20 μm, and the calibration residual errors were less than 2 μm. When intermittent external forces were applied to the stage, the change of the stage’s error motion could also be monitored accurately.

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