High-Sensitivity Liquid Manometer Controlled by Personal Computer Using a Laser Diode (2nd Report, Arrangement of Optical Devices).

An automatic liquid manometer which operates on the basis of a position-detecting system is described. A slanting laser beam is directed to the meniscus of liquid in a glass tube manometer without a float and is reflected by the meniscus. The reflected spotlight is focused on a position-sensitive detector (PSD) through a lens. The application of external pressure to the manometer causes the position of the meniscus to change, and the pressure can be gotten indirectly by this position. The relationship of the output of PSD to the displacement of meniscus was investigated, and the fuzzy control rules were determined to make the meniscus back to its original position fast and stable. The system has been tested with good results.

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Pengujian sensor fotodetektor sebagai alat ukur kadar gula pada larutan gula

Jurnal TAMBORA ◽

10.36761/jt.v4i1.570 ◽

2020 ◽

Vol 4 (1) ◽

pp. 39-45

Author(s):

Alex Taufiqurrohman Zain

Keyword(s):

Optical Fiber ◽

Light Source ◽

Personal Computer ◽

Sugar Content ◽

High Sensitivity ◽

Single Mode ◽

Rapid Response ◽

Single Mode Optical Fiber ◽

Measurement Results ◽

Selection Of

Photodiode is a type of photodetector. P-I-N (PIN) link photodiode was chosen in this study. This selection is based on high sensitivity and rapid response to any changes in light. BPW 34 type photodiode is used as a photodetector and RGB bright LED as its light source. The selection of RGB bright LEDs is based on its ability to automatically change the beam spectrum based on bit changes. As a medium for propagating light, a single mode optical fiber is used. In addition to designing hardware, this research also designs applications through Arduino IDE 1.0.4 and LabVIEW 2013 so that hardware can be controlled and displayed on a PC. As a microcontroller, the Arduino UNO module was used in this study. The results of this study indicate that the rays on the RGB bright LED can be controlled through the bit system on a PC (Personal Computer), and can bring up the measurement results of sugar content through a PC.

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Birefringent elastomers with Multiple Stimuli-Responses

10.21203/rs.3.rs-1150417/v1 ◽

2021 ◽

Author(s):

Yiyang Gao ◽

Danqi Sun ◽

Jing Chen ◽

Lei Shi ◽

Xinyu Da ◽

...

Keyword(s):

Strain Sensor ◽

High Sensitivity ◽

Soft Materials ◽

Fast Response ◽

Optical Devices ◽

High Birefringence ◽

Interference Color ◽

Human Body Temperature ◽

Low Modulus ◽

Shed Light

Abstract Currently, even though birefringent soft materials have attracted considerable attention for many sensors and optical devices, it is still difficult for most of them to achieve multiple responses. Herein, we have designed a multiple-responding birefringent elastomer with high birefringence but low modulus by using 2-phenoxy-ethanoacrylate (PHEA) as monomer and 4-cyano-4'pentylbiphenyl as solvent. The excellent transparency (~90%) exhibited by the designed birefringent elastomer allowed us to observe the change of interference color. The obtained birefringent elastomer not only can be used as a photoelastic strain sensor with high sensitivity and fast response but also show a very sensitive response to heat, particularly in the range of the human body temperature. More interestingly, it shows excellent dielectric properties with a strong correlation between the interference color and the applied electric field, which allows easily writing and erasing the encrypted information. These unique multi-signal response features of our obtained birefringent elastomer shed light on the multiple information encryptions, the anti-counterfeiting, and the multifunctional sensors.

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Development of an Integrated Instrument for Nucleic Acid Pyrosequencing Detection

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.315-316.469 ◽

2006 ◽

Vol 315-316 ◽

pp. 469-473

Author(s):

Ji Jun Zhu ◽

H.N. Shi ◽

J. Cheng ◽

X.Y. Wei ◽

Zu Hong Lu

Keyword(s):

Nucleic Acid ◽

Personal Computer ◽

Low Cost ◽

High Sensitivity ◽

Structure Design ◽

Nucleic Acid Detection ◽

Data Sampling ◽

Sampling Device ◽

Automatic Instrument ◽

Injection Process

This paper introduces a kind of new homemade and low cost multi-channel nucleic acid pyrosequence detector for at least ninety-six channels and presents the detail of related software and hardware development. We construct a kind of automatic instrument to fulfill the pyrosequencing processes. First we select the X-86 personal computer as host computer, the AT89C51 micro-controller as slave computer, the PMT (photoelectric multiply tube) as photoelectric transformation equipment, and the HY-6022 as data sampling device; Second we use the Visual C++ 6.0 as coding tools to design the measure and control system based on Windows 2000 operating system; Third we sample the fluorescent signal in all of the cuvettes during the reaction between nucleic acid and reagent; Last we analyze these data to realize the function of the multi-channel nucleic acid detection. In this paper the whole instrument design and key parts design are both introduced such as the liquid injection process and related structure design, the communication module between the host personal computer and the MCS51, the high sensitivity multi-channel detector (at least 96 channels, the sensitivity is 2.45×10-9w) etc. The result of the instrument for two channels data processing is also reported in this paper.

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