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可燃性氣體檢測與報警系統的外文翻譯--使用無線的可燃氣體檢測系統的設計(編輯修改稿)

2026-02-12 12:00 本頁面

　

【文章內容簡介】 f TC35i and MCU is shown in Figure 5. Themunication 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.Fig. 4 nRF905 Application SchematicFig. 5 TC35i and MCU interface circuitSoftware DesignThe software system includes data acquisition module, temperature pensation module, and wireless transceiver moduleWireless sending program. NRF905 data sending process is as follows:1) When having data to send, the microcontroller send the receiver39。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。3) Beacause of AUTO_RETRAN being high, the data of nRF905 is constantly reissued untilTRX_CE=0.4) when TRX_CE pin is set low, means the data transmission pleted and nRF905 enter idlemode.Wireless receiving program. NRF905 data receiving process is as follows:1) When TRX_CE = 1 and TX_EN = 0, nRF905 enters ShockBurstTM receive mode checking constantly and waiting for receiving data.2) When nRF905 detect the carrier having same frequency band, the carrier detect pin will be set high.3) When nRF905 receive a matched address, the address matches pin will be set high.4) When packet correctly received, the word head, address and CRC bits will automatically beremoved, and the data ready pin will be set high.5) MCU set TRX_CE to 0, and nRF905 enter to idle mode.6) When all the data received, nRF905 set data ready pin and address matching pin to 0, andnRF905 turn to shutdown mode or ShockBurstTM transmitmode and receive mode. Wireless data transmission flow chart Wireless data receiving flow chartSummaryDesigned an equipment to detect the concentration of bustible gas, which has wireless transceiver functions and can send the alarm information to user’s mobile promptly through results show that the devices hav

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