Share Email Print
cover

Proceedings Paper

Accurate time-of-flight measurement of particle based on ECL-TTL Timer
Author(s): Deping Li; Jianguo Liu; Shuhua Huang; Huaqiao Gui; Yin Cheng; Jie Wang; Yihuai Lu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Because of its aerodynamic diameter of the aerosol particles are stranded in different parts of different human respiratory system, thus affecting human health. Therefore, how to continue to effectively monitor the aerosol particles become increasingly concerned about. Use flight time of aerosol particle beam spectroscopy of atmospheric aerosol particle size distribution is the typical method for monitoring atmospheric aerosol particle size and particle concentration measurement , and it is the key point to accurate measurement of aerosol particle size spectra that measurement of aerosol particle flight time. In order to achieve accurate measurements of aerosol particles in time-of-flight, this paper design an ECL-TTL high-speed timer with ECL counter and TTL counter. The high-speed timer includes a clock generation, high-speed timer and the control module. Clock Generation Module using a crystal plus multiplier design ideas, take advantage of the stability of the crystal to provide a stable 500MHz clock signal is high counter. High count module design using ECL and TTL counter mix design, timing accuracy while effectively maintaining , expanding the timing range, and simplifies circuit design . High-speed counter control module controls high-speed counter start, stop and reset timely based on aerosol particles time-of-flight, is a key part of the high-speed counting. The high-speed counting resolution of 4ns, the full scale of 4096ns, has been successfully applied Aerodynamic Particle Sizer, to meet the precise measurement of aerosol particles time-of-flight.

Paper Details

Date Published: 13 November 2014
PDF: 9 pages
Proc. SPIE 9279, Real-time Photonic Measurements, Data Management, and Processing, 927911 (13 November 2014); doi: 10.1117/12.2071467
Show Author Affiliations
Deping Li, Anhui Institute of Optics and Fine Mechanics (China)
Hefei Institutes of Physical Science (China)
Jianguo Liu, Anhui Institute of Optics and Fine Mechanics (China)
Hefei Institutes of Physical Science (China)
Shuhua Huang, Anhui Institute of Optics and Fine Mechanics (China)
Hefei Institutes of Physical Science (China)
Huaqiao Gui, Anhui Institute of Optics and Fine Mechanics (China)
Hefei Institutes of Physical Science (China)
Yin Cheng, Anhui Institute of Optics and Fine Mechanics (China)
Hefei Institutes of Physical Science (China)
Jie Wang, Anhui Institute of Optics and Fine Mechanics (China)
Hefei Institutes of Physical Science (China)
Yihuai Lu, Anhui Institute of Optics and Fine Mechanics (China)
Hefei Institutes of Physical Science (China)


Published in SPIE Proceedings Vol. 9279:
Real-time Photonic Measurements, Data Management, and Processing
Bahram Jalali; Ming Li; Keisuke Goda; Mohammad Hossein Asghari, Editor(s)

© SPIE. Terms of Use
Back to Top