A methane detection alarm for coal mine with high precision and high stability
A high-stability, methane detection technology, used in the measurement of color/spectral characteristics, etc., can solve the problems of cross-absorption interference, poor vibration resistance, limited range, etc., to achieve the effect of easy portability, zero drift, and narrow measurement range.
Pending Publication Date: 2018-10-26
重庆光可巡科技有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a high-precision and high-stability methane detection alarm for coal mines, which can solve the problems of zero-point drift, short life, poor vibration resistance, poor stability, limited range, and the impact of water vapor, dust, and other interfering gas components. Problems such as cross-absorption interference of methane gas
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[0028] Such as Figure 1-6 As shown, the present invention is a high-precision and high-stability coal mine methane detection alarm, a high-precision and high-stability coal mine methane detection alarm, including a TDLAS laser detector, an alarm, a central processing unit and a display The TDLAS laser detector is set in the area for detecting methane, the output end of the TDLAS laser detector is connected to the central processing unit, the output end of the central processing unit is connected to the alarm and the display screen, and the TDLAS laser detector is The absorption spectrum is set so that there are no other gas components nearby. The central processing unit includes a power supply circuit and a CPU processing circuit. The power supply circuit provides power for the entire system. The CPU processing circuit is used to process the TDLAS laser detector. Signal, the alarm device includes an alarm lamp and a buzzer, the alarm lamp and the buzzer are connected in parall...
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The invention discloses a methane detection alarm for coal mine with high precision and high stability. The methane detection alarm includes a TDLAS laser detector, an alarm device, a central processing unit, and a display screen, the TDLAS laser detector is arranged in the area used for detecting methane, the output terminal of the TDLAS laser detector is connected with the central processing unit, the output terminal of the central processor is connected with the alarm device and the display screen, the absorption spectrum arranged in the TDLAS laser detector is no other gas composition components nearby, the central processing unit includes a power supply circuit and a CPU processing electric circuit, power is provided for the whole system by the power supply circuit, the CPU processingelectric circuit electric circuit is used for processing the signal transmitted from the TDLAS laser detector, and the problem that the error of the detected result is large caused by the serious cross absorption interference of the methane gas by the background gas components is solved.
Description
Technical field [0001] The invention relates to a laser detection alarm, in particular to a high-precision and high-stability methane detection alarm for coal mines. Background technique [0002] The current coal mine methane detection and alarm instruments mainly use thermal catalysis to detect the concentration of ambient methane gas. Introduction to the principle of catalytic combustion detection technology: The catalytic combustion sensor adopts the Wheatstone bridge principle. The platinum resistor in the catalytic element and the flammable and explosive gas in the environment undergo flameless combustion, and the combustion produces temperature changes, which causes the resistance of the resistor to occur Change, break the balance of the bridge, make it output a stable differential voltage signal, and then go through the amplification, stabilization and sampling processing of the subsequent circuit to obtain the sampled voltage value, and the sampled voltage value is basica...
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Login to View More IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 马成全太锋陈兵
Owner 重庆光可巡科技有限公司