scholarly journals Flexible lock-in detection system based on synchronized computer plug-in boards applied in sensitive gas spectroscopy

2007 ◽  
Vol 78 (11) ◽  
pp. 113107 ◽  
Author(s):  
Mats Andersson ◽  
Linda Persson ◽  
Tomas Svensson ◽  
Sune Svanberg
Keyword(s):  
Detection System ◽  
Lock In

Weak Signal Detection System Based on Lock-in Amplifier Technology

2013 ◽  
Vol 389 ◽  
pp. 489-493
Author(s):  
Yong Lv ◽  
Chun Hui Niu ◽  
Yue Qiang Li ◽  
Qing Shan Chen ◽  
Xiao Ying Li ◽  
...  
Keyword(s):  
Signal Detection ◽  
Detection System ◽  
Signal To Noise Ratio ◽  
Weak Signal ◽  
Weak Signal Detection ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Phase Sensitive ◽  
Lock In

In order to detect the weak signal deeply buried in the noise, a weak signal detection system based on lock-in amplifier is proposed. The system includes the preamplifier circuit, active low pass filter circuit, AC amplifying circuit and phase sensitive demodulation circuit. Test results show that it can greatly increase the signal-to-noise ratio (SNR) up to 12.7db.

scholarly journals An FPGA-based lock-in detection system to enable Chemical Species Tomography using TDLAS

2015 ◽  
Author(s):  
Andrea Chighine ◽  
Edward Fisher ◽  
David Wilson ◽  
Michael Lengden ◽  
Walter Johnstone ◽  
...  
Keyword(s):  
Detection System ◽  
Chemical Species ◽  
Lock In

Solar Cell Defects Detection Using Lock-In Amplifier

2012 ◽  
Vol 512-515 ◽  
pp. 276-279 ◽  
Author(s):  
Iat Fai Leong ◽  
Jing Jing Fang ◽  
Joseph Liao
Keyword(s):  
Solar Cell ◽  
High Spatial Resolution ◽  
Detection System ◽  
Signal To Noise Ratio ◽  
Ccd Camera ◽  
Inspection System ◽  
Signal To Noise ◽  
Excitation Light ◽  
Processing Control ◽  
Lock In

In this research we present a Lock-In amplifier photoluminescence image (PLI) detection system. Using a commercially available CCD camera, combined with a modulated excitation light source system, Lock-In amplifier technique is employed to enhance the sensitivity and signal-to-noise ratio of the image. Using a high resolution camera, we developed a high spatial resolution non-contact inspection system for solar cell. Each solar cell can be examined within 2s relevant for inline processing control.

Lock-in Amplifier for Pulse-Driven Quantum Cascade Lasers Gas Detection System

2016 ◽  
Vol 45 (8) ◽  
pp. 814001
Author(s):  
苗春壮 MIAO Chun-zhuang ◽  
蔺百杨 LIN Bai-yang ◽  
党敬民 DANG Jing-min ◽  
李春光 LI Chun-guang ◽  
王利军 WANG Li-jun ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Detection System ◽  
Gas Detection ◽  
Quantum Cascade ◽  
Lock In ◽  
Cascade Lasers

scholarly journals Pendeteksi Kehadiran menggunakan ESP32 untuk Sistem Pengunci Pintu Otomatis

2021 ◽  
Vol 7 (1) ◽  
pp. 37
Author(s):  
Anton Prafanto ◽  
Edy Budiman ◽  
Putut Pamilih Widagdo ◽  
Gubtha Mahendra Putra ◽  
Reza Wardhana
Keyword(s):  
Smart Home ◽  
Detection System ◽  
Signal Strength ◽  
Received Signal Strength ◽  
Low Energy ◽  
Experimental Results ◽  
Received Signal Strength Indicator ◽  
Bluetooth Low Energy ◽  
Door Lock ◽  
Lock In

The design of the detection system in this study using ESP32 module that includes Wi-Fi: 802.11 b / g / n and Bluetooth: v4.2 BR / EDR and Bluetooth Low Energy (BLE). In general, the automatic door lock system using a fingerprint or RFID card in its implementation, but this study using BLE which is a component of iBeacon which has a function as a result of the fingerprint and RFID card. ESP32 have a duty to control the door lock in order to open and lock the door using relays and solenoid system, in addition to the BLE on ESP32 serves to detect the presence of individuals where Bluetooth Device Address (BD_ADDR) smartwatch or individual gadget is already registered on ESP32. Based on the experimental results, the system can detect a user's presence smartwatch on the Received Signal Strength Indicator (RSSI), which is determined on the program was uploaded to ESP32. This system can also be developed in the future and applied to a variety of special purposes such as absenteeism, indoor mapping, and smart home.

Sign in / Sign up

Export Citation Format

Share Document