| Carbon monoxide, sulfur dioxide, and methane is the main industrial field of harmful gases, if the gas leaks into the air will be a serious threat to the safety of staff industrial scene.How to live in real time to accurately detect the concentration of harmful gases, it is the key to avoiding accidents. When the concentration of harmful gases up to a certain limit, can easily cause a major security incidents, the current use of the different functions, the principles of the gas detector, the function of the prevalence of low degree of automation,measurement methods cumbersome, not intuitive readings, human error large, disadvantages can not store data. Analysis of the existing different principles of gas detector, this topic is designed industrial site toxic gas detector based on android system can be used for real-time detect the presence of harmful gas leakage and detect the concentration has been exposed in the field environment of harmful gases, through sound and light alarm becomes the advance as an early warning, which to prevent accidents from happening.The issue for the industrial site safety issues, the design of this industrial site toxic gas detector with: toxic gas concentration detection and storage, GPS positioning, BT/WIFI communications, data display and real-time upload. When the detector to monitor the site of toxic gas concentration reaches the set threshold value is good, it will be in the form of sound and light alarm alarm. GPS positioning function provides real-time location of field personnel, to facilitate on-site personnel to locate, you can speed up production after the accident rescue program. BT/WIFI communication site to ensure that the gas concentration and location information can be uploaded to the host computer in real time. This topic mainly the following research areas:1, industrial field hardware circuit schematic design toxic gas detector. In S5 P 4418 as the main chip, developed by the company run Seoul E4418 core board minimum system built hardware platform based on the entire system, the main design of the lithium battery charging and power supply circuit, a sensor circuit, BT/WIFI communication circuitry, GPS module circuit The liquid crystal display circuit, OTG debug interface circuit and sound and light alarm circuit.2, referring to the industrial field explosion GB draw PCB board. PCB sub-module,full-page drawing. Taking into account the detector appearance compactness, draw the PCB board member placed to minimize the footprint, but also taking into account the stability ofthe system, to minimize the area of the return of the ring in order to reduce inductive noise;avoid 90 degree line, reduce high frequency noise emission; power line and ground to try to rough, in addition to reducing the pressure drop, the more important is that it can reduce the coupling noise. Meanwhile, since the subject of the detector is designed for use in the industrial field, but also in reference to the PCB layout when national explosion-proof standards implementation, strict control of current intensity.3, the BT communication software programming. According to the design requirements of the subject, BT communication separately with MSP430 microcontroller as the core board is completed, using C language programming under computer software BT communication,to achieve toxic gas concentration data, where the data collection and upload. |
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