12 results about "Gas concentration" patented technology

A large convoluted space, such as a multi-story concourse of an airport is isolated and a chemical or biological agent in the concourse is deactivated. A plurality of deactivation gas sources (100) introduce a deactivation gas at multiple points along the concourse. Fans (66, 106) circulate the deactivation gas, sensors (110) sense concentrations of the deactivation gas at numerous points around the concourse and exhaust fans (66) exhaust air, spent deactivation gas, and some deactivation gas. A control processor (84) controls the generators, the circulation fans, and the exhaust fans in accordance with the gas concentrations sensed by the sensors to increase and decrease deactivation gas concentration in selected subregions of the concourse by increasing or decreasing generation, increasing or decreasing exhausting, or altering flow patterns among subregions.

The invention discloses an on-line detection instrument for hydrogen fluoride gas. The on-line detection instrument comprises a detection system and a central processing system, wherein the detection system comprises a sampling device and an HF (Hydrogen Fluoride) gas sensor which is connected with the central processing system; the sampling device comprises a gas detection chamber; the gas detection chamber is provided with a gas inlet and a gas outlet which are connected with a GIS (Geographic Information System) high-pressure gas chamber; the HF gas sensor is fixed on the gas detection chamber; a testing end of the HF gas sensor is positioned inside the gas detection chamber; gas from the GIS high-pressure gas chamber enters the gas detection chamber; the HF gas sensor is used for detecting the concentration of the HF gas in the gas, and used for transmitting detection information to the central processing system to be processed so as to obtain the content of the HF gas. The invention further discloses a method for quantitatively detecting the hydrogen fluoride gas by using the detection instrument. By utilizing the detection instrument and the method, the content of the hydrogen fluoride gas can be rapidly and accurately detected in real time, and SF6 inside SF6 electric equipment is not lost.

The invention discloses a method for searching a gas leakage source by dynamically integrating a plurality of search strategies. The method comprises a stage of estimating adaptability of various search methods under different search conditions by means of an artificial neural network to determine a main factor which affects performance of various searching methods, and train the artificial neural network for estimating the adaptability of the search methods; an integration mode of a plume finding phase, namely, an integration strategy which combines the search method based on a visual attention mechanism with a random search method; an integration mode of a plume tracing phase, namely, respectively determining a search direction of the next step by a chemotaxis method, an anemotaxis method and a visual method when a robot detects the gas concentration information, and inputting the current search condition which is the main factor affecting the performance of the search methods to the trained artificial neural network to obtain the adaptability of various methods, and planning a local search route of the robot by a driving force vector composition method. The method can obviously improve the efficiency and the success rate of searching the gas leakage source.

The invention is suitable for the technical field of fire-fighting safety and provides a fire-fighting polling method, a fire-fighting polling device, electronic equipment and a computer readable storage medium. The fire-fighting polling method comprises the following steps: controlling a polling terminal to move along a preset polling path; in the moving process, acquiring environment informationaround the polling terminal, wherein the environment information comprises gas concentration information and heat radiation information; judging whether gas leaks around the polling terminal or not based on the gas concentration information; judging whether a fire behavior happens around the polling terminal or not based on the heat radiation information; and sending a first command when gas leakage or fire behavior happens around the polling terminal is judged, wherein the first command is used for indicating a preset valve controller to execute an operation of closing a gas valve. The humanresources can be saved, the dangerous omen judging objectivity and accuracy are improved, and dangerous omen spread can be found and avoided as early as possible favorably.

A gas measurement system includes a sensor element and an associated electronic control unit (ECU) or the like connected thereto for receiving sensor element emf outputs. The ECU is configured to provide output signals or parameters indicative of ammonia and heavy HC gas concentrations. The sensor element has an NH₃ sensor electrode output and a NO_x sensor electrode output. The information conveyed by the NO_x sensor electrode output may be selectively used by the ECU, in accord with so-called emf selection rules, to correct for a cross-interference effect that NO₂ has on the NH₃ electrode. Heavy HC gas concentrations may cause electrochemical activity on the NH₃ electrode, and can be misinterpreted. A further emf selection rule is configured to detect the presence of heavy HC gas and is used by the ECU to suppress an output signal or parameter indicative of an ammonia gas concentration.

The invention discloses a multipurpose gas detection and purification device. The device comprises a power supply assembly, an induction control assembly, an execution assembly and an air purificationassembly; the induction control assembly comprises a single-chip microcomputer, a gas-sensitive sensor and a gas concentration sensor; the gas-sensitive sensor is used for detecting peculiar smell, toxic gas and concentration information thereof; the gas concentration sensor is used for detecting the concentration information of traditional Chinese medicine gas after the action of a fan; the execution assembly comprises a high-temperature traditional Chinese medicine evaporator, the fan and a display screen, wherein the high-temperature traditional Chinese medicine evaporator, the fan and thedisplay screen are correspondingly with the single-chip microcomputer, and the high-temperature traditional Chinese medicine evaporator is placed in front of the fan and used for evaporating the traditional Chinese medicine gas; and the single-chip microcomputer controls the fan to work discontinuously according to the concentration information of the traditional Chinese medicine gas, and controls the traditional Chinese medicine evaporator to work or not in high temperature according to the concentration information of the toxic gas. According to the device, the toxic gas in closed space canbe eliminated, the traditional Chinese medicine gas is used for discontinuously neutralizing an odor, the concentration of the traditional Chinese medicine gas is controllable, and therefore discomfort caused by exceedingly-high concentration of the traditional Chinese medicine gas is avoided.

The invention provides an anti-explosion monitoring system for a coal mine. The anti-explosion monitoring system for the coal mine comprises a monitoring center positioned above a mine shaft, one or multiple underground substations positioned under the mine shaft and a monitoring device connected with the underground substations. The monitoring center comprises a monitoring mainframe, a database system, a display device and an alerting device. The monitoring device comprises a processor module, a sensor module, a nixie tube displaying module and an acousto-optical alerting module. The processor module is connected with the underground substations through a wireless transmission module. The underground substations are connected with the monitoring mainframe through a RS-485 bus. The anti-explosion monitoring system for the coal mine has the advantages that the gas concentration under the mine shaft is effectively monitored, the accuracy degree and the stability of monitoring of the system are improved, and the flexibility and the extendable capability of the system are improved.

The invention relates to the technical field of mine air measurement, in particular to a tungsten ore underground air quality measurement device. The tungsten ore underground air quality measurement device comprises a shell body, a dust-proof mechanism is fixedly connected to the shell body, a reinforcing plate is fixedly connected to the outer side of a sealing plate, fixing frames are correspondingly connected to the two sides of the outer part of the reinforcing plate, a supporting plate is fixedly connected to the reinforcing plate, a telescopic air cylinder is fixedly connected to the upper end of the supporting plate, a bracket plate is connected to the telescopic end of the telescopic air cylinder through a connecting block, a fixing box is fixedly connected to the upper end of thebracket plate, a fixing mechanism is connected into a first through hole, the fixing mechanism is connected with a detector, and an oxygen concentration sensor and a gas concentration sensor are connected to the upper end of the detector. The invention further provides a tungsten ore underground air quality measurement method. According to the tungsten ore underground air quality measurement method and device, the oxygen concentration sensor and the gas concentration sensor are pushed to move upwards through the telescopic air cylinder, the oxygen and the gas concentration content of differentheights can be detected, and thus the detection accuracy of the underground air is higher.

The invention discloses a detector and a main controller, the detector is installed under the seat of the passenger car and in the battery compartment, powered by a vehicle-mounted DC 24V, the detector is connected to the main controller through wireless, and the abnormal gas and ambient temperature are detected in real time. Monitoring, the main controller is powered by DC 24V, and connected to the car instrument through the CAN bus. The detector detects the hazardous gas and ambient temperature, and sends the detected data to the main controller wirelessly. When the transmitted abnormal gas concentration or ambient temperature exceeds the set threshold, the main controller will turn on the corresponding sound and light alarm, and transmit the data to the car dashboard, prompting the driver to take measures to pull over and open the car door. The invention adopts the zigbee wireless connection, which is convenient for installation, and the single point damage will automatically re-establish the network to restore the communication, and the reliability is high. The sensor can detect various anomalies such as volatile gas, temperature, and carbon dioxide of flammable products, and can be easily installed in key points such as carriages and battery compartments to detect and warn of various dangers.

The invention discloses a gas-liquid separation mechanism capable of monitoring gas concentration. The gas-liquid separation mechanism comprises an upper casing, a lower casing and a gas-liquid filtration diaphragm, wherein the upper end of the lower casing is connected with the lower end of the upper casing, the gas-liquid filtration diaphragm is arranged in the lower casing and has the upper endconnected with the inner side wall of the lower casing, a transition cavity is formed between the lower casing and the gas-liquid filtration diaphragm, the upper casing, the lower casing and the gas-liquid filtration diaphragm constitute a gas accommodating cavity, a liquid inlet pipe and a liquid drain pipe which are communicated with the transition cavity are arranged on the side wall of the lower end of the lower casing, a stop valve is arranged on the liquid drain pipe, and a liquid outlet pipe communicated with the transition cavity is arranged on the side wall of the upper end of the lower casing. Spiral isolation plates wind around the outer side wall of the gas-liquid filtration diaphragm and divide the transition cavity to form spiral channels communicated with the liquid inlet pipe and the liquid drain pipe. The mechanism is simple in overall structure, convenient to implement and convenient to operate and high in separation efficiency when separating gas in a liquid, and thus, the detection efficiency of gas in the liquid can be improved.