CN105806785A - Portable laser methane detecting device and detecting method thereof - Google Patents

Abstract

The invention discloses a portable laser methane detection device and a detection method thereof. A data acquisition module and a human-computer interaction module are connected to the processor. The invention adopts an embedded ARM processor, and through the data acquisition module to collect methane concentration and temperature and humidity data, the ARM processor realizes faster response speed, small measurement error, strong anti-interference ability, and greatly improves the accuracy and accuracy of data acquisition. The safety of monitoring and the probability of avoiding accidents can effectively solve the problems of low safety and high probability of accidents caused by large data acquisition errors, slow response speed and poor anti-interference ability in the prior art. The present invention also has the advantages of With the characteristics of simple structure, cheap price and convenient and fast control, the calculation of the risk coefficient is realized by obtaining the methane change rate through the fuzzy reasoning algorithm, which makes the prediction of dangerous situations more scientific and reasonable.

Description

A portable laser methane detection device and its detection method

technical field

The invention belongs to the field of mine environment safety detection, and in particular relates to a portable laser methane detection device and a detection method thereof.

Background technique

my country is the world's largest coal producer and consumer, and one of the few countries in the world that uses coal as its main energy source. In the process of coal mining, many harmful gases coexist in the coal seam, such as CH4, CO and so on. The content of CH4 and CO is high, and it is difficult to dissolve in water. It is also an inflammable and explosive gas. The gas concentration reaches the explosion limit. The life safety of the victim has brought hidden dangers.

At present, the gas detectors used in underground coal mines in my country are mainly single-parameter detectors, which are inconvenient to use, and when detecting, the detection response speed is slow, the detection error is large, the anti-interference ability is weak, the degree of intelligence is not high, the operation speed is slow, real-time Problems such as weak graphical representation greatly affect the accuracy of data collection, poor safety monitoring under the mine, high probability of accidents, and can only detect the loss of methane concentration to judge the danger. For when the methane concentration is temporarily at a low dangerous concentration However, when approaching a higher risk state at a faster speed, traditional instruments cannot solve this problem, which often results in false positives and false negatives, and the test is unscientific and unreasonable. In addition, the display results of traditional detectors are concentration data, which is often difficult to intuitive Reflect the dangerous situation of gas accurately, especially for non-professionals.

Contents of the invention

The technical problem to be solved by the present invention is to provide a portable laser methane detection device and its detection method, which are more accurate, fast, and stable, with higher acquisition accuracy, better safety monitoring, and greatly reduced accident rate, so as to solve the existing problems in technology.

The technical solution adopted by the present invention is: a portable laser methane detection device, including a data acquisition module for temperature, humidity and methane concentration acquisition, an ARM processor, and a human-computer interaction module for displaying data and inputting data, the ARM A data acquisition module and a human-computer interaction module are connected to the processor.

Preferably, the above-mentioned ARM processor is connected to the monitoring terminal through the wireless communication module, and the distribution of methane can be monitored through the monitoring terminal, so that security arrangements and security strategies can be made in time to improve the security of monitoring.

Preferably, the above-mentioned data acquisition module includes 51 single-chip microcomputer chips and 51 single-chip microcomputers connected to temperature and humidity sensors and laser methane sensors, connected through the single-chip microcomputer, only serial port drive is required, and the control and installation are more convenient.

Preferably, the above-mentioned ARM processor is connected with an audible and visual alarm device and a vibration prompting device. The audible and visual alarm device includes a warning light and a phoenix whistle or a horn. When the methane concentration and temperature and humidity exceed the set threshold, the audible and visual alarm device will It will send out sound and light reminders, which greatly improves safety and timeliness, and reduces accidents. In the harsh environment of high noise, dense dust and low visibility under the mine, the warning effect of the sound and light alarm device is poor, and the vibration reminder device is installed to solve the problem. solved the problem.

Preferably, the above-mentioned ARM processor is connected with a data storage module for storing data, and the data storage module can store detected data for subsequent query and use analysis.

Preferably, the above-mentioned ARM processor adopts the S3C2440 chip.

Preferably, the above-mentioned human-computer interaction module adopts a touch screen, which is convenient for displaying and setting parameters, has a compact structure, and is more convenient to carry.

Preferably, the above-mentioned wireless communication module adopts a 3G/4G wireless module, the transmission data is reliable and fast, and the crisis situation is handled in a timely manner. The upload speed of 4G data communication can reach 20Mbps, and it can be deployed in places where DSL and cable TV modems are not covered. wider.

A detection method of a portable laser methane detection device, the method includes the following steps: first, the methane concentration in the mine environment is sent to 51 single-chip microcomputers in the form of voltage/current signals through the laser methane sensor on the portable laser methane detection device, 51 The single-chip microcomputer performs data processing and sends it to the ARM processor; secondly, the ARM processor processes the obtained voltage/current signal to obtain the methane concentration and the collection time point to store in its own storage module, and the ARM processor regularly reads the methane concentration of the data storage module and collects At the time point, fuzzy reasoning algorithm is used to calculate the change rate of methane concentration, and then calculate the risk factor of fire and explosion.

Beneficial effects of the present invention: Compared with the prior art, the present invention adopts an embedded ARM processor, and through the acquisition of methane concentration and temperature and humidity data by the data acquisition module, the ARM processor realizes faster response speed and small measurement error, Strong anti-interference ability, which greatly improves the accuracy of data collection and monitoring safety, avoids the probability of accidents, and can effectively solve the security problems caused by large data acquisition errors, slow response speed and poor anti-interference ability in the prior art. low and high accident probability, the present invention also has the characteristics of simple structure, cheap price and convenient and fast control, and the risk coefficient deduced by fuzzy reasoning algorithm to calculate the rate of change of methane concentration is more scientific and reasonable, greatly reducing the The probability of accidents is reduced, and it provides a stronger guarantee for the safety of underground workers, effectively solving the irrationality and unscientificity of predicting the risk coefficient in the existing detection methods.

Description of drawings

Fig. 1 is a schematic diagram of the control structure of the present invention.

detailed description

The invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

As shown in accompanying drawing 1, a kind of portable laser methane detection device comprises the data acquisition module for temperature and humidity and methane concentration acquisition, ARM processor and the human-computer interaction module for displaying data and inputting data, and described ARM processing The controller is connected with a data acquisition module and a human-computer interaction module, and the controller is also connected with a power module. The power module includes a battery and a charging module connected to the battery, so as to avoid the failure of detection caused by the exhaustion of the battery in the mine. It can be charged directly under the mine, saving time and effort, and the whole device is integrated into a housing to form a portable detection device.

The above-mentioned ARM processor is connected to the monitoring terminal through the wireless communication module, and the distribution of methane can be monitored through the monitoring terminal, and security arrangements and security strategies can be made in time to improve the security of monitoring.

The above-mentioned data acquisition module includes 51 single-chip microcomputer chips and 51 single-chip microcomputers connected to temperature and humidity sensors and laser methane sensors, which are connected through single-chip microcomputers, only need serial port drive, and are more convenient to control and install.

The above-mentioned ARM processor is connected with an audible and visual alarm device and a vibration prompting device. The audible and visual alarm device includes a warning light and a horn or a horn. When the concentration of methane and temperature and humidity exceed the set threshold, the audible and visual alarm device will sound Light reminder greatly improves safety and timeliness, and reduces accidents. In the harsh environment of high noise, dense dust and low visibility under the mine, the warning effect of the sound and light alarm device is poor, and the installation of the vibration reminder device solves this problem. .

The above-mentioned ARM processor is connected with a data storage module for storing data, and the data storage module can store detected data for subsequent query and use analysis.

The above-mentioned ARM processor adopts the S3C2440 chip.

The above-mentioned human-computer interaction module adopts a touch screen, which is convenient for displaying and setting parameters, has a compact structure, and is more convenient to carry.

The above-mentioned wireless communication module adopts 3G/4G wireless module, which can transmit data reliably and quickly, and deal with crisis situations in a timely manner.

Principle of use: first collect signals, send the temperature, humidity and methane concentration of the mine environment in the form of voltage/current signals to the 51 single-chip microcomputer through the temperature and humidity sensor and the laser methane sensor, and then send the data to the S3C2440 chip after signal processing by the 51 single-chip microcomputer Carry out further analysis and processing, use the fuzzy reasoning algorithm as the methane concentration analysis algorithm, analyze and process the collected signals with the fuzzy reasoning algorithm, obtain the change rate of the methane concentration, and then calculate the risk factor of fire and explosion, when the risk factor is high , an alarm signal is issued. After analysis and processing, the current methane concentration, methane concentration change rate, risk factor, current temperature and humidity and other information are displayed in an intuitive way through the touch screen. At the same time, the data information will be stored in the data storage module, and the data information can be transmitted to the monitoring terminal mobile phone or computer through the 3G/4G module after the wireless function is manually turned on on the touch screen.

Embodiment 2: a detection method of a portable laser methane detection device, the method comprises the following steps: first, the methane concentration in the mine environment is sent to 51 single-chip microcomputers, 51 single-chip microcomputers carry out data processing and send them to the ARM processor; secondly, the ARM processor processes the obtained voltage/current signals to obtain the methane concentration and the collection time point to store in its own storage module, and the ARM processor regularly reads the data of the data storage module The methane concentration and collection time point use the fuzzy reasoning algorithm to calculate the change rate of methane concentration, and then calculate the risk factor of fire and explosion.

The fuzzy reasoning algorithm is used to calculate the rate of change of methane concentration to infer the risk factor is more scientific and reasonable, which greatly reduces the probability of accidents and provides a stronger guarantee for the safety of mine workers. It effectively solves the problem of predicting the risk factor in existing detection methods. unreasonable and unscientific.

ARM processor is used for calculation, with fast response and fast processing, which greatly improves detection accuracy and data reliability.

The laser methane sensor has high detection accuracy and response speed, as shown in Table 1.

Table 1 Advantages and disadvantages of laser methane sensor and catalytic combustion methane sensor

The present invention has a more scientific and reasonable way of reflecting and alarming the concentration dangerous situation. The methane gas concentration detection device is widely used. Traditional devices mostly adopt the method of setting the alarm threshold. Call the police. But the facts have proved that when the methane concentration is temporarily at a lower dangerous concentration but is approaching a higher dangerous state at a faster speed, the degree of danger should be reasonably classified as a higher dangerous state, and traditional instruments cannot solve this problem, so often In addition, the display results of traditional detectors are concentration data, which is often difficult to intuitively reflect the dangerous situation of gases, especially for non-professionals.

The introduction of fuzzy inference algorithm provides a feasible way to overcome these shortcomings. The present invention uses the fuzzy reasoning algorithm to predict the risk coefficient, can accurately and efficiently detect the concentration and concentration change rate of methane mixed gas, and then calculates the risk coefficient of fire and explosion, and simultaneously provides the user with the concentration-change rate and the risk coefficient in an explicit manner, The function of the instrument is well expanded, and the detection reliability is significantly improved. At the same time, the intuitiveness of the display is greatly enhanced, and the scope of application of the instrument is broadened, which plays an extremely important role in the safe production and operation of methane concentration places such as industrial mines and gas stations.

In addition, it has been proved that the traditional sound and light alarm method cannot play a good warning role in the harsh environment of the mine (big noise, dense dust, low visibility, etc.), and a vibration prompting device is added in the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (9)

1. A portable laser methane detection device, characterized in that: comprising a data acquisition module for temperature and humidity and methane concentration acquisition, an ARM processor and a human-computer interaction module for displaying data and input data, the ARM processor A data acquisition module and a human-computer interaction module are connected to it. 2. A portable laser methane detection device according to claim 1, characterized in that: the ARM processor is connected to the monitoring terminal through a wireless communication module. 3. A portable laser methane detection device according to claim 1, wherein the data acquisition module includes 51 single-chip microcomputer chips and 51 single-chip microcomputers connected to laser methane sensors. 4. A portable laser methane detection device according to claim 1, characterized in that: the ARM processor is connected with an audible and visual alarm device and a vibration prompt device. 5. A portable laser methane detection device according to claim 1, characterized in that: said ARM processor is connected with a data storage module for storing data. 6. A portable laser methane detection device according to claim 1, characterized in that: the human-computer interaction module adopts a touch screen. 7. A portable laser methane detection device according to claim 2, wherein the wireless communication module adopts a 3G/4G wireless module. 8. A portable laser methane detection device according to claim 1, characterized in that: the ARM processor uses a S3C2440 chip. 9. The detection method of a portable laser methane detection device according to any one of claims 1 to 8, characterized in that: the method comprises the following steps: first, the mine environment is detected by the laser methane sensor on the portable laser methane detection device The methane concentration is sent to the 51 single-chip microcomputer in the form of voltage/current signal, and the 51 single-chip microcomputer performs data processing and sends it to the ARM processor; secondly, the ARM processor processes the obtained voltage/current signal to obtain the methane concentration and the collection time point to store itself The storage module and the ARM processor regularly read the methane concentration of the data storage module and the acquisition time point, and use the fuzzy reasoning algorithm to calculate the change rate of the methane concentration, and then calculate the risk factor of fire and explosion.