A near-infrared multi-gas sensor based on IWTD-CEEMDAN and WOA-BiLSTM for detection of CH4 and NH3 leaked in industrial production

Li, Guolin; Song, Yimeng; Zhao, Hao; Dong, EnTing; Li, Jiarui; Jia, Lupeng; Liu, Yajing; Zhang, Siyu; Zhao, Fei

doi:10.1016/j.infrared.2023.104695

Cited by 9 publications

(2 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The schematic of the detection principles is shown in Figure 1. For laser detection of methane, the absorption intensity near the wavelength of 1653.7 nm is large and the rest of the interference gases such as H2O and CO2 in this band have much smaller absorption intensity than the methane, so the impact on methane detection can be ignored [11] . Therefore this circuit is designed based on a 1653 nm laser.…”

Section: Principle Of As Detectionmentioning

confidence: 99%

Circuit design of a high scanning frequence and fast response laser methane remote sensor

Yang,

Wu,

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

To solve the problem of slow detection of laser methane sensors based on tunable diode laser absorption spectroscopy (TDLAS), a methane detection system with a high detection rate was proposed. Focusing on the hardware circuit design of the system which consists of a laser driver circuit, laser temperature control circuit, optical amplifier and filter circuit and main control circuit based on FPGA+ARM, this circuit is designed to achieve a laser scanning frequency of 50 kHz. A voltage-controlled current source is designed to drive the laser diode (LD). A TEC controller is designed to keep the operating temperature of the laser diode stable. Since the photocurrent can be very weak, to ensure the quality of signals from the photodiode (PD), a signal collection circuit consisting of the transimpedance amplifier, gain-controlled amplifier and low-pass filter was designed. An experiment is carried out to test system measurement capabilities. The results show the circuit can reach a response time of 2.5 ms while ensuring a measurement error of less than 4.3%.

show abstract

Section: Principle Of As Detectionmentioning

confidence: 99%

Circuit design of a high scanning frequence and fast response laser methane remote sensor

Yang,

Wu,

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Principle diagram of a sensor.When using the TDLAS technology to measure gas concentration, an isolated absorption peak of the gas to be measured should be selected to avoid the absorption interference of non-target gas. In this paper, the absorption peak at 1, 653.7 nm is chosen for the design, at which the absorption intensity of the interfering gases such as H2O and CO2 has a much smaller absorption intensity than that of methane gas[10][11] .…”

mentioning

confidence: 99%

Design of single-laser remote methane gas measurement system with distance measurement based on time-division multiplexing technology

Wu,

Yang,

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Limited to the principle of Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology, the existing open-path laser remote methane measurement system can only measure the integral concentration, and it needs to be matched with a laser rangefinder to complete the calculation of the average concentration, which increases the complexity of the system. To solve this problem, by driving the laser diode (LD) in time-division multiplexing mode, we complete the integral concentration of gas and distance measurement with the use of a single LD. We complete the design of the laser signal transceiver structure and finish the corresponding hardware circuit design, including the LD driving circuit, frequency generation, mixer circuit, and optoelectronic signal receiving circuit. The experiment shows the measurement error of the system is less than 2.5% while measuring the average concentration in the case of different concentrations and distances, and the system greatly reduces the system complexity while satisfying the performance requirements.

show abstract

Performance enhancement of mid-infrared NH3 sensor using 9.06 μm QCL based on spectral optimization and NGO-LSTM model

Li,

Jia,

Dong

et al. 2024

Anal Bioanal Chem

View full text Add to dashboard Cite

A near-infrared multi-gas sensor based on IWTD-CEEMDAN and WOA-BiLSTM for detection of CH4 and NH3 leaked in industrial production

Cited by 9 publications

References 28 publications

Circuit design of a high scanning frequence and fast response laser methane remote sensor

Circuit design of a high scanning frequence and fast response laser methane remote sensor

Design of single-laser remote methane gas measurement system with distance measurement based on time-division multiplexing technology

Performance enhancement of mid-infrared NH3 sensor using 9.06 μm QCL based on spectral optimization and NGO-LSTM model

Contact Info

Product

Resources

About