Optical sensor

Nghiên cứu "Đánh giá diễn biến và ảnh hưởng của một số yếu tố khí tượng đến nồng độ bụi PM2.5 tại một điểm ven đô Hà Nội" sử dụng cảm biến quang học thế hệ mới (new palm-sized optical PM2.5 sensor) để xác định mức độ bụi PM2.5, diễn biến nồng độ bụi theo thời gian thực và mối quan hệ giữa nồng độ bụi với một số yếu tố khí tượng tại một điểm hỗn hợp nằm tại khu vực giảng đường của Học viện Nông nghiệp Việt Nam tại Trâu Quỳ, Gia Lâm, Hà Nội trong khoảng thời gian 4 tháng, từ tháng 12 năm 2017 đến tháng 3 năm 2018.

9p giangnhanly 02-10-2023 8 3   Download

The focus of this study is to investigate its optical and conductive properties under different conditions of doping environments, temperature and polymerization conditions. Optical characterization technique such as UV-Visible spectroscopy is developed to carry out the investigation. The developed nanofibers have been demonstrated to possess optical and conductive properties to be dependent on doping variables. Study of these optical properties could prove very useful in the development of electrochromic devices and gas sensors.

103p runthenight07 01-03-2023 7 3   Download

This thesis presents an evaluation of the mapping performance of a variety of SLAM algorithms that are freely available in the Robot Operating System (ROS), in conjunction with ranging data from various ranging sensors suitable for use onboard small UAS. To compare the quality of the generated maps, an existing metric was initially employed, however deficiencies noted in this metric led to the development of two new metrics. A discussion of both the existing and new map quality metrics, and the advantages and disadvantages of each, is presented as part of this thesis.

99p runthenight04 02-02-2023 10 2   Download

The thesis "Device Engineering of III-Nitride Semiconductors Based Sensors" covers the scope to explore next-generation optical sensors by growing high-quality IIInitride thin films using plasma-assisted molecular beam epitaxy (PAMBE) system and their deployment towards the fabrication of the device engineered high-performance broadband photodetectors. This thesis mainly focuses on three engineering approaches to fabricate advanced optical sensing devices.

124p runordie3 06-07-2022 12 2   Download

This paper simulates an optical sensor utilizing a prism based on surface plasmon resonance (SPR). The simulations combine a layer of Au and an additional layer of different materials: aluminum arsenide (AlAs), poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), zinc oxide (ZnO), and polydimethylsiloxane (PDMS) for SPR excitation. The simulations show that a sensor based on a combination of Au/PEDOT:PSS layers with thicknesses of 40 nm and 5 nm, respectively, offers a sensor sensitivity of 186.07°/RIU, which is 1.2 times better than that of a sensor using only a thin Au layer.

12p nguaconbaynhay10 19-02-2021 8 1   Download

The objectives of the thesis: Research and fabricate the one-dimensional (1D) – nanoporous silicon microcavity (1D-NPSMC) structures by using electrochemical etching method with the selectivity of wavelength in visible range from 200 nm to 800 nm.

28p xacxuoc4321 09-07-2019 30 5   Download

The objectives of the thesis: Research and fabricate the one-dimensional (1D) – nanoporous silicon microcavity (1D-NPSMC) structures by using electrochemical etching method with the selectivity of wavelength in visible range from 200 nm to 800 nm. The 1D-NPSMC structures has high reflectivity, narrow linewidth of the pass-band and homogeneous pores.

28p xacxuoc4321 09-07-2019 42 6   Download

The main contents of this chapter include all of the following: Capacitive sensors, resistive sensors, magnetic sensors, hall – effect sensors, piezoelectric transducers, strain gauges, piezoresistive sensors, optical sensors, ultrasonic transducers, nuclear sensors, microsensors.

46p youcanletgo_04 17-01-2016 39 1   Download

Lecture Sensors and analytical devices: Temperature measurement include all of the following: Thermoelectric effect sensors (thermocouples), varying resistance devices, semiconductor devices, radiation thermometers, thermography (thermal imaging), thermal expansion methods, quartz thermometers, fiber – optic temperature sensors,...

48p youcanletgo_04 17-01-2016 42 4   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.

39p youcanletgo_04 17-01-2016 62 2   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Optical Wireless Sensor Network System Using Corner Cube Retroreflectors

6p sting11 10-03-2012 40 4   Download

The article deals with a research on the design and manufacturing of a dynamic balancing machine, using dynamic load sensors and optical one, for calculating the unbalanced mass in thick rotating part on two choosen correction planes. Dynamic load sensors attached to the bearing supports of the machine help us determine the reaction forces generated by the unbalanced mass of the rotor. These load signals are filtered and digitized at a sampling rate which is synchronous to the rotor via an optical sensors.

6p meoden89nd 19-01-2011 79 37   Download

Không như chuột cơ (mechanical mouse); dùng hệ thống cơ_quang to, nặng nề(trái banh, con quay, đĩa quay,…) chuyển đổi sự xoay của trái banh thành sự di chuyển của con trỏ màn hình. Chuột quang (optical mouse) dùng Optical Navigtion Technology (tạm dịch : công nghệ dẫn đường quang) để theo dõi sự di chuyển của chuột.Optical Navigaton Technology sử dụng một cảm biến quang (optical sensor), hệ thấu kính và nguồn phát ánh sáng đơn sắc (chủ yếu là LED đơn sắc). ...

8p trannguyen1111 16-07-2010 418 68   Download

Thực ra dịch là hệ số nhân tiêu cự cũng không hoàn toàn chính xác, rất dễ gây hiểu lầm. Nếu cứ để đúng theo nghĩa đen của nó (dịch word by word) là hệ số "cắt cúp" thì vẫn chính xác hơn. Nhưng quan trọng là cần hiểu rõ bản chất vấn đề. Lấy theo ví dụ của bạn Nostar: Khi tăng tiêu cự thực sự từ 100mm lên 150mm (optical zoom) thì sẽ có 2 hệ quả xảy ra: (i) Góc thu hình (angle view) sẽ hẹp lại, (ii) Kích thước ẢNH trên film (sensor) sẽ lớn hơn....

10p camry24 11-07-2010 126 22   Download

Physical measurement dimensions, such as temperature or pressure and tensile forces, can affect glass fibres and locally change the characteristics of light transmission in the fibre. As a result of the damping of the light in the quartz glass fibres through scattering, the location of an external physical effect can be determined so that the optical fibre can be employed as a linear sensor. Light scattering, also known as Raman scattering, occurs in the optical fibre.

53p gacon89 13-06-2010 105 12   Download