Detection terminal for underground poisonous gases

Abstract

The invention discloses a detection terminal for underground poisonous gases. The detection terminal comprises a power supply; the power supply is connected with a signal processing circuit, a PSoC single-chip microcomputer, an XBee-Pro module, a display circuit, an alarm circuit and a plurality of NDIR gas sensors; the PSoC single-chip microcomputer is equipped with an AD converter; the NDIR gas sensors convert a variety of poisonous gas into electric signals and transmit the electric signals to the PSoC single-chip microcomputer via th signal processing circuit; information displaying and alarming are realized via the display circuit and the alarm circuit; the PSoC single-chip microcomputer is in wireless communication with the XBee-Pro module; and an on-chip hardware circuit is arranged in the PSoC single-chip microcomputer and is provided with two operational amplifiers, two twelve-bit A / D converters, a timer, an UART communication interface and one PWM module. The detection terminal can complete detection of a plurality of poisonous gases, prevents workers from poisoning in a working place and has the characteristics of convenience in debugging, low power dissipation, high sensitivity, safety, reliability, long service life, etc.

Description

technical field [0001] The invention relates to the technical field of underground gas detection, in particular to an underground toxic gas detection terminal. Background technique [0002] In the process of oil drilling, the detection of methane, carbon dioxide and hydrogen sulfide gas is an important content. On the one hand, it is helpful for oil and gas discovery, and on the other hand, it is helpful for safe drilling. [0003] The current methane detection is mainly realized by gas chromatography analysis on the ground. It has been a certain lag time for methane gas to return to the wellhead through the annular drilling fluid, and the accuracy of the oil and gas information carried will also be affected. It also needs a large number of peripheral auxiliary equipment, which is periodic and cannot be detected in real time. As the drilling speed becomes faster and faster, the periodic requirements for gas analysis become more and more stringent. Therefore, it is of great ...

AI Technical Summary

Problems solved by technology

[0005] The conventional hydrogen sulfide gas detection method is to use electrochemical sensors to detect hydrogen sulfide in drilling fluid gas on the ground. Since it takes a certain time for hydrogen sulfide gas to return from the bottom of the well to the ground, there is a lag in the detection of hydrogen sulfide gas.

Images