Sensor Electronics

Chuyển đổi đo lường là 1 thiết bị kĩ thuật nhằm thực hiện một quan hệ đơn trị giữa hai đại lượng vật lý xác định với một độ chính xác nào đó. Chuyển đổi đo lường: Chuyển đổi sơ cấp. Chuyển đổi chuẩn hóa.Điện tử (còn gọi là electron, được biểu diễn như là e−) là một hạt hạ nguyên tử, hay hạt sơ cấp. Trong nguyên tử electron quay xung quanh hạt nhân (bao gồm các proton và neutron) trên quỹ đạo electron. Từ electron bắt nguồn từ tiếng Hy Lạp ηλεκτρον (phát âm là "êlectron") có nghĩa là "hổ...

68p duongvananhtntn 14-10-2010 437 125   Download

This chapter presents the following content: Diaphragms, capacitive pressure sensor, fiber – optic pressure sensors, bellows, bourdon tube, manometers, resonant wire devices, electronic pressure gauges, special measurement devices for low pressures, high – pressure measurement, differential pressure-measuring devices, selection of pressure sensors.

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In this thesis, we have proposed a completed the algorithms, window size and theeshold values for fall detection using a 3-DOF accelerometer, a MQ7 sensor, a micro controller, and the coresponding embedded algorithms.

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The system use solar power system, Electronic box with LCD display and rotary button to choose easily the menu and function, sensor calibration, frequency measurement as well as data transmission modes (GSM / radio waves) .

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Microfabricated accelerometer sensors have been developed to measure acceleration in a variety of applications, including automobile airbag crash sensors and seismic activity monitors. For this thesis a three-dimensional accelerometer sensor has been created for measuring involuntary human hand motion. The sensor uses three single-axis accelerometers fabricated at the MIT Microsystems Technology Laboratory.

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Sensor used in this project is MOC 7811 from Motorola. This is a slotted coupler/interrupter device. In each revolution as the beam is interrupted, the sensor generates a positive pulse. Microcontroller will execute interrupt routine, When a pulse occurs. Interrupt routine measures the total time taken for one revolution, divides it by 120, and stores the result into another timer, Configured in auto-reload mode. Now, the timer overflows after tiny intervals of time. Each time it overflows, next stored value is called from the lookup table, and displayed....

11p thantqvuong 02-04-2012 270 73   Download

Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008, Article ID 529879, 16 pages doi:10.1155/2008/529879 Research Article Biometric Methods for Secure Communications in Body Sensor Networks: Resource-Efficient Key Management and Signal-Level Data Scrambling Francis Minhthang Bui and Dimitrios Hatzinakos The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario, Canada M5S 3G4 Correspondence should be addressed to Dimitrios Hatzinakos, dimitris@comm.utoronto.

16p dauphong18 24-02-2012 56 4   Download

Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008, Article ID 286168, 10 pages doi:10.1155/2008/286168 Research Article Extension of Pairwise Broadcast Clock Synchronization for Multicluster Sensor Networks Kyoung-Lae Noh,1 Yik-Chung Wu,2 Khalid Qaraqe,3 and Bruce W. Suter4 1 Digital Solution Center, Corporate Technology Operations, Samsung Electronics Co., Ltd., South Korea of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong 3 Texas A&M University at Qatar, P.O.

10p dauphong18 24-02-2012 79 6   Download