摘要
基于MSP430F149的CO检测仪适用于家庭,它是利用气敏传感器MQ-7采集CO信号,并将其转换为电压信号。由于MQ-7的输出信号为伏特级,所以,不需要放大电路,可以直接将传感器的输出信号输入到A/D转换的模拟通道口。经过A/D转换后,可以将数字信号传送到单片机作处理,单片机处理后通过数码管显示电路显示出气体的浓度。这款检测仪具有性能可靠、经济实惠的特点。
The paper designs a carbon monoxide detector based on MSP430F149, suitable for family. The tester converts collected CO signal to voltage signal through the gas sensor MQ-7. Because the output signal of MQ-7 is volts level, so the system doesn＇t need amplifying circuit. The output signal of MQ-7 can be input into analog interface of A/D convention. After A/D conversion, the digital signals will be sensed to single chip to deal. The gas concentration will be showed through digital tube display circuit after MCU processing. The detector have characteristics of reliable performance and affordable by the economic.
出处
《科技与创新》
2015年第22期11-12,共2页
Science and Technology & Innovation
