The light absorbed degree of color solution is related to solution concentration, level thickness and incident wavelength. The blood coagulation analyzer designed with optical heterometry method is lower priced ,and the complete absorbancy curve can be got ,so it has some advantages for excluded the impact of random errors and further studies. The designed acquisition circuit are composed of the led, silicon photocell, I/V converter, amplifying circuit, it input the detected voltage variation signal data to acquisition Card of A/D acquisition terminal then the data is processed by PC. According to the normalized design ideas, both projective method and scattering method are used in a test. Due to the Acquisition Card stable performance, high resolution and free from external influence ,so it can collect high-precision data for further data-processing .In order to improve the test accuracy, collecting data before and after reaction to eliminate ambient light interference. Verify the feasibility of this design by test APPT, and compare the two methods.

Date Published: 15 November 2011
PDF: 6 pages
Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83211P (15 November 2011); doi: 10.1117/12.904757

Published in SPIE Proceedings Vol. 8321:
Seventh International Symposium on Precision Engineering Measurements and Instrumentation
Kuang-Chao Fan; Man Song; Rong-Sheng Lu, Editor(s)