可燃性氣體檢測(cè)與報(bào)警系統(tǒng)的外文翻譯--使用無(wú)線的可燃?xì)怏w檢測(cè)系統(tǒng)的設(shè)計(jì)

1、 本科畢業(yè)論文 本科畢業(yè)論文(設(shè)計(jì) 設(shè)計(jì))外 文 文 獻(xiàn) 翻 譯譯文題目： 譯文題目： Design of detection of combustible gas and alarm system 學(xué)生姓名： 學(xué)生姓名： 專 業(yè)： 業(yè)： 指導(dǎo)教師： 指導(dǎo)教師：

2、 2013 年 2 月第 2 頁(yè)The slave part mainly complete data collection and wireless transmission. The master part mainly complete receiving data, displaying and sending alarm message.The signal of gas conc

3、entration is collected by combustible gas sensor which generates a weak electrical signal. The signal can be amplified and stabilized by conditioning circuit. And then A/D circuit converts the analog signal to digital

4、signal which microcontroller can process. In order to improve the measurement accuracy, and reduce the impact of temperature, design a temperature compensation circuit to collect tempreture data. AT89S52 process the c

5、ollected data and send data to the master by wireless transceiver.The master receives the data and displays it by LED. And if the gas concentration being abnormal,the system will drive speaker for an alarm signal and us

6、e TC35i module to send alarm information to user’s mobile. Hardware design Signal Signal acquisition acquisition and and conditioning conditioning circuit. circuit. Figure 2 shows data acquisition circuit. TGS813 is a

7、Gas sensing resistive sensor. The conductivity of TGS813 is influenced by the concentration of combustible gases in air, the greater the concentration, the higher conductivity. In system R0, R9, R10 and RS (in TGS813)

8、form a bridge circuit to convert resistance to voltage signal. Operational amplifier A connected as a voltage follower with resistors R7 and regulator D1 make up the voltage regulator circuit to supply power for the br

9、idge. In order to the voltage adapt to the A/D converter, the voltage is amplified by opamp B, and the magnification can be adjusted through resistor R11. Fig. 2 Gas concentration signal acquisition circuitFig. 3 Temper