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摘 要：該文設(shè)計(jì)了一款用于無線遙控的電機(jī)調(diào)速系統(tǒng)。系統(tǒng)采用超低功耗MSP430單片機(jī)作為手持遙控裝置，電機(jī)調(diào)速控制端采用STC12C5A60S2單片機(jī)，通過無線傳感器nRF905進(jìn)行電機(jī)速度與狀態(tài)控制。AT24C02用于電機(jī)調(diào)速參數(shù)的存儲，控制部分與電機(jī)驅(qū)動部分通過TLP521光耦隔離，電機(jī)驅(qū)動采用集成芯片L298，測速部分采用100線的光電編碼器。遙控端與電機(jī)調(diào)速端分別配有1602和12864液晶來顯示系統(tǒng)參數(shù)，4×4矩陣鍵盤作為系統(tǒng)輸入設(shè)備。 該系統(tǒng)采用無線傳感器nRF905，其開放ISM頻道，最高工作速率50kbps，高效的GFSK調(diào)制，抗干擾能力強(qiáng)，特別適合工業(yè)控制場合，傳輸距離可達(dá)到500米，并且可以工作在節(jié)能模式，配合超低功耗單片機(jī)MSP430實(shí)現(xiàn)遙控裝置的低功耗。電機(jī)閉環(huán)調(diào)速采用自動控制領(lǐng)域很成熟的PID算法，實(shí)現(xiàn)電機(jī)調(diào)速的穩(wěn)定性、精確性、快速響應(yīng)，增大了調(diào)速范圍。系統(tǒng)加入存儲電路EEPROM，使得系統(tǒng)調(diào)節(jié)的參數(shù)可以保存，使整個(gè)系統(tǒng)更靈活，更人性化。 實(shí)驗(yàn)結(jié)果表明，該設(shè)計(jì)具有使用便捷、可靠性高、調(diào)速精度高、安裝調(diào)試方便等特征，適合工廠一些控制危險(xiǎn)或特殊的場合，具有較好的應(yīng)用前景。 關(guān)鍵字：無線傳感器；單閉環(huán)調(diào)速；PID；PWM
Abstract: This paper designs a wireless remote controlled motor speed system. It uses Microcontroller MSP430 of ultra low power consumption as the handheld remote control device, Motor speed and states are controlled by the STC12C5A60S2 Microcontroller through the wireless sensor nRF905. AT24C02 is used to store motor parameters. The control and drive of motor are isolated by the light coupling unit TLP521. Motor drive adopts integrated chip L298, speed is measured by the 100 line of photoelectric encoder. The remote controller and motor respectively display system parameters with 1602 and 12864 with the liquid crystal. 4 x 4 matrix keyboard is used as system input device. The system adopts wireless sensor nRF905, which has open ISM channel with the highest rate 50 KBPS, efficient GFSK modulation, strong anti-interference ability is especially suitable for industrial control occasions and whose the transmission distance can be up to 500 meters, it can work in energy saving mode cooperated with low-power-consumption MSP430 Microcontroller to realize remote control device of low power consumption. Motor speed closed-loop control field by using automatic very mature PID algorithm, achieve the stability of the motor speed, accuracy, rapid response, and increases the speed range. System has storage circuit EEPROM, make the regulation of the system parameters can be saved, so that the whole system is more flexible and more humane. The experimental results show that the design is easy to use, high reliability, high speed precision, convenient installation and debugging, suitable for factory some control dangerous or special occasions, and has a good application prospect. Keywords: wireless ; single closed loop speed regulation; PID; PWM |
