The Design Of Wireless Harmful Gas Detector Based On STC12A60S2

In mining often occurs as a result of carbon monoxide poisoning causes the personnel casualty accidents,and in disaster relief and meet the confined space rescue personnel can not enter,so the design of a far control and visualization of the detector by necessary.But can realize the function of detector also very Co.,existing are mainly some hand-held detector,not able to realize remote detection and visualization capabilities.To solve this problem,we need to be able to monitor the environmental indicators and visual remote control device.Combining the actual need,this systemcomposed of a detector and a controller.the detector composed of a single-chip microcomputer STC12A60S2 as the core,including the power supply module(provide three sets of 3.3V,5V and 12 V voltage),clock reset circuit,18B20 temperature module,the gas sensor module(including MQ-5 gas sensor,mq-7 oxygen of sensor in carbon and MQ-135 air quality sensor),servo module,L298 driving module and a wireless transceiver module.The controller is also based on the MCU STC12A60S2 as the core,including the power module(which provides 3.3V and 5V two group voltage),LCD display module,joystick control module,clock reset circuit and wireless transceiver module.After experimental verification,the link type and wheel,designed a certain angle,the climbing and obstacle effect.Remote control distance in the open environment can be 700 meters(transmission rate of 1Mbps)or so,in the cave environment can achieve 100 meters of transmission.The gas composition and temperature of the tested environment can be displayed on the LCD screen of the remote controller in real time and clearly.The car forward,backward,turn left,turn right and in rotation manipulation of good and no roll over phenomenon;horizontal rotate 360 degrees can be achieved through remote control of camera gear,vertical direction can achieve 180 degrees adjustment.Therefore,it can be observed for a full range of scene to be measured.This detector can be used for the detection of harmful gas in the coal mines,caves and other special environment,but also can be used for disaster relief and rescue occasions.Therefore,it has certain application value.