Evaluation of an ultrasonic propagation speed measurement system in the temperature range from 20°C to 45°C

AlGaAs/GaAs heterojunction bipolar transistor (HBT) high speed ICs have been paving the way for the most sophisticated fiber-optic communication systems since the late 1980s. Recently 20 Gbps HBT ICs have been developed to accommodate the emergence of optical fiber amplifiers. HBT technology is now proceeding towards the development of 40 Gbps systems where the lack of high speed measurement system remains an issue.

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Research on Speed Measurement System Based on DSP

Information Technology Journal ◽

10.3923/itj.2013.6605.6609 ◽

2013 ◽

Vol 12 (22) ◽

pp. 6605-6609

Author(s):

Jianhua Ren ◽

Yanceng Liu ◽

Zhengang Liang

Keyword(s):

Measurement System ◽

Speed Measurement

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An Adaptive Video-based Vehicle Detection, Classification, Counting, and Speed-measurement System for Real-time Traffic Data Collection

2019 IEEE Region 10 Symposium (TENSYMP) ◽

10.1109/tensymp46218.2019.8971196 ◽

2019 ◽

Cited By ~ 1

Author(s):

Amit Ghosh ◽

Md. Shahinuzzaman Sabuj ◽

Hamudi Hasan Sonet ◽

Swakkhar Shatabda ◽

Dewan Md. Farid

Keyword(s):

Data Collection ◽

Real Time ◽

Measurement System ◽

Vehicle Detection ◽

Traffic Data ◽

Real Time Traffic ◽

Speed Measurement ◽

Traffic Data Collection ◽

Adaptive Video

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A Research of High Precision Rotational Speed Measurement System Based on Infrared Sensor and Microcontroller

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.278-280.680 ◽

2013 ◽

Vol 278-280 ◽

pp. 680-683

Author(s):

Zi Qin Ma ◽

Ren Zhang ◽

Da Li Kang ◽

Wu Yang

Keyword(s):

High Precision ◽

Measurement System ◽

Rotational Speed ◽

Pulse Signal ◽

Measuring Method ◽

Infrared Light ◽

Infrared Sensor ◽

Flip Flop ◽

Speed Measurement ◽

Photoelectric Sensor

With the deep analysis on the rotational speed measurement and the error existed in the measurement process at present, this paper introduces a high precision rotational speed measurement system based on infrared sensor and microcontroller. This system combines with improved measuring method. The sensor is an infrared photoelectric sensor, and uses its characteristics of the autocollimator ensured accuracy of measurement. The photoelectric sensor outputs weak voltage pulse signal when it receives the reflected infrared light. And then the signal is processed by double-reversed amplification and twice pulse shaping circuit. The system uses the relevant logic functions of a D-type flip-flop to control two 16-bit microcontroller chip timing/counter turned on and off simultaneously, and calculates the rotation speed. At last, the result is displayed on LED by Microcontroller. This measurement system has high accuracy, fast sampling speed and wide measuring range.

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