Laser methane sensor

Abstract

The utility model discloses a laser methane sensor. According to the laser methane sensor, the temperature control module and the signal processing module are respectively in signal transmission with the single chip microcomputer, the single chip microcomputer respectively controls the temperature measurement circuit, the temperature control circuit and the constant current circuit, and the laser respectively transmits signals to the temperature measurement circuit, the temperature control circuit and the photodiode. The constant current circuit transmits signals to the photodiode, the photodiode transmits the signals to the signal acquisition circuit, and the signal acquisition circuit transmits the signals to the single-chip microcomputer. According to the gas sensor, the temperature control aspect and the signal processing aspect work cooperatively, the overall performance of the sensor is improved, and efficient and accurate gas detection is ensured.

Description

Technical Field

[0001] This utility model relates to the field of laser signal acquisition, and more specifically, to a laser methane sensor. Background Technology

[0002] With increasing global focus on clean energy, the monitoring and detection of methane, a major greenhouse gas, has become crucial. Methane not only plays a significant role in energy production and consumption, but its leaks can also have serious impacts on the environment and public safety. Therefore, developing efficient methane sensors, especially those based on laser detection technology, has become an important research area.

[0003] The working principle of laser methane sensors is based on optical absorption technology. Specifically, methane gas is irradiated with a laser beam, and the concentration of methane is determined by measuring the attenuation of the laser signal, utilizing the selective absorption characteristics of methane molecules to a specific wavelength of laser light. Since methane's absorption spectrum is in the near-infrared region, commonly used laser sources include tunable laser diodes (TDLs) and quantum cascade lasers (QCLs). These lasers provide high-precision wavelength tuning capabilities, significantly improving the sensitivity and selectivity of methane gas detection.

[0004] Currently, existing laser methane sensors suffer from low detection accuracy due to interference from various gases in the environment during actual detection. In addition, the laser generates a large amount of heat during excitation, which affects the operation of the laser and makes it difficult to accurately detect the concentration of methane gas. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a laser methane sensor.

[0006] This utility model discloses a laser methane sensor, which is implemented through the following technical solution: the temperature control module and the signal processing module transmit signals to the microcontroller, the microcontroller controls the temperature measurement circuit, the temperature control circuit, and the constant current circuit, the laser transmits signals to the temperature measurement circuit, the temperature control circuit, and the photodiode, the constant current circuit transmits signals to the photodiode, the photodiode transmits signals to the signal acquisition circuit, and the signal acquisition circuit transmits signals to the microcontroller.

[0007] The constant current circuit provides a stable current to support the laser's emission; the temperature measurement circuit collects the ambient temperature of the emission environment, and the temperature control circuit controls the ambient temperature; finally, the signal amplification circuit amplifies the output signal to facilitate its acquisition and analysis.

[0008] In terms of temperature control, this invention ensures stable laser emission through a constant current circuit and a temperature control module, and adjusts the ambient temperature in real time to effectively avoid the impact of temperature fluctuations on measurement results. Regarding signal processing, the signal acquisition circuit accurately acquires signals, while the signal amplification circuit and signal processing module enhance signal strength, ensuring high precision and stability in data acquisition and signal analysis. The synergistic operation of these two components improves the overall performance of the sensor, ensuring efficient and accurate gas detection. Attached Figure Description

[0009] Figure 1 This is a schematic diagram illustrating the principle of this utility model. Detailed Implementation

[0010] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this utility model pertains. The terminology used in this specification of the utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model.

[0011] like Figure 1 As shown, the temperature control module and the signal processing module transmit signals to the microcontroller. The microcontroller controls the temperature measurement circuit, the temperature control circuit, and the constant current circuit. The laser transmits signals to the temperature measurement circuit, the temperature control circuit, and the photodiode. The constant current circuit transmits signals to the photodiode, the photodiode transmits signals to the signal acquisition circuit, and the signal acquisition circuit transmits signals to the microcontroller.

[0012] The constant current circuit provides a stable current to support the laser's emission; the temperature measurement circuit collects the ambient temperature of the emission environment, and the temperature control circuit controls the ambient temperature; finally, the signal amplification circuit (composed of a photodiode and a signal acquisition circuit) amplifies the output signal to facilitate its acquisition and analysis.

[0013] This invention first acquires the ambient temperature in real time through a temperature measurement circuit and transmits the data to a microcontroller. The microcontroller analyzes the data and determines whether to activate the temperature control circuit to adjust the device and maintain the set temperature. Simultaneously, a laser and a photodiode work together; the laser emits a laser signal, which the photodiode receives and converts into an electrical signal. This signal is then transmitted to the microcontroller for processing via a data acquisition circuit. Furthermore, a constant current circuit ensures a stable current output from the laser, preventing fluctuations from affecting signal quality. A signal amplification circuit further amplifies weak signals, ensuring sufficient signal strength for accurate processing. This invention combines temperature control and signal processing functions to ensure efficient sensor operation in a stable environment.

[0014] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A laser methane sensor, characterized in that The temperature control module and the signal processing module respectively transmit signals to the single-chip microcomputer, the single-chip microcomputer controls the temperature measuring circuit, the temperature control circuit and the constant current circuit respectively, the laser respectively transmits signals to the temperature measuring circuit, the temperature control circuit and the photodiode, the constant current circuit transmits signals to the photodiode, the photodiode transmits signals to the signal acquisition circuit, and the signal acquisition circuit transmits signals to the single-chip microcomputer.

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