可燃性氣體檢測與報(bào)警系統(tǒng)的外文翻譯--使用無線的可燃?xì)怏w檢測系統(tǒng)的設(shè)計(jì)-預(yù)覽頁
【正文】 echnology applied to the gas monitoring field, can resolve the problem of remote monitoring in special environment, such as high temperature, low temperature, toxic unable to wiring .In the presented work, the bustible gas detectoris fully functional (with wireless transceiver), simple, small size, low cost, and has high sensitivity. The equipment can greatly improve the system39。s address and the data to nRF905 chronologically by the SPI placed the data to be transmitted into TxBuf register, send WTP mand to write the data to TXPayload register, and send WTA mand to write TX address to the TXAddress register.2) The microcontroller set TRX_CE=1 and TX_EN=1 to stimulate nRF905 ShockBurstTM sending mode. When data transmission pleted, the data ready pin is set high。奴隸的功能是收集數(shù)據(jù)，處理數(shù)據(jù)和過渡到主數(shù)據(jù)。由于傳感器的精度受環(huán)境的影響，采用DS18B20實(shí)現(xiàn)溫度補(bǔ)償。雖然氣體檢測技術(shù)已經(jīng)比較成熟，但大多數(shù)產(chǎn)品有許多不足之處，如功能單一，操作復(fù)雜，笨重，昂貴的和低靈敏度。系統(tǒng)的設(shè)計(jì)該系統(tǒng)由兩部分組成，如圖1所示圖1系統(tǒng)總體框圖下位機(jī)部分主要完成數(shù)據(jù)采集和無線傳輸。然后A/D轉(zhuǎn)換電路將模擬信號轉(zhuǎn)換為數(shù)字信號，單片機(jī)可以處理。如果氣體濃度異常，系統(tǒng)會發(fā)出報(bào)警信號并利用TC35I模塊發(fā)送報(bào)警信息到用戶的手機(jī)揚(yáng)聲器驅(qū)動。在系統(tǒng)R0，R9，R10和RS（在TGS813）形成一個(gè)橋電路將電阻的電壓信號。為了提高系統(tǒng)的精度，結(jié)果必須進(jìn)行溫度補(bǔ)償和溫度校正。典型應(yīng)用示意圖如圖4所示。的munication between MCU and TC35i is via serial, and the rate is 9600bps. Communicationsmode is 8bit asynchronous with a start bit, 8 data bits, and 1 stop bit. But the serial input of TC35i requires CMOS level, and serial output of 89C52 requires TTL level. In order to achieve the voltage conversion the system use the way of resistors sharing voltage.單片機(jī)與TC35I之間的通信是通過串行，和速率是9600。然后把要發(fā)送的數(shù)據(jù)發(fā)送到發(fā)送緩沖器寄存器，WTP命令寫入數(shù)據(jù)寄存器和發(fā)送TX的有效載荷，WTA命令寫德克薩斯州TX地址寄存器地址。無線接收程序，nRF905接收數(shù)據(jù)的過程如下：1）當(dāng)TRX _這= 1和TX _ = 0，nRF905 enters shockbursttm receive模式不斷和等待接收數(shù)據(jù)的檢查2）當(dāng)nRF905檢測載體具有相同的頻段，載波檢測引腳將被設(shè)置高。6) When all the data received, nRF905 set data ready pin and address matching pin to 0, and6）當(dāng)接收的所有數(shù)據(jù)集，nRF905的數(shù)據(jù)準(zhǔn)備好引腳和地址匹配引腳到“0”，和nRF905 turn to shutdown mode or ShockBurstTM transmitmode and receive mode.nRF905轉(zhuǎn)向模式或關(guān)機(jī)shockbursttm transmitmode和接收模式。電容層析成像技術(shù)對氣固兩相流循環(huán)流化床的研究[J]測量。計(jì)算機(jī)科學(xué)國際會議和計(jì)算技術(shù)（iscsct），上海，2008:8083機(jī)械制造工藝與設(shè)備使用無線傳輸技術(shù)的可燃?xì)怏w檢測系統(tǒng)的設(shè)計(jì)DesignTC35i. International Symposium on Computer Science and Computational Technology (ISCSCT), Shanghai, 2008:8083functions and can send the alarm information to user’s mobile promptly through results show that the devices have high precision, stability and reliability. It can meet mostapplications which need realtime monitoring of bustible gas concentration.
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