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1、Method 78 20065 B10030492(2006)S1007803TP223 Designand implementationofIntelligent NetworkFeeder 430074 20060306 C8051F020 PID Abstract:This paper introduces thedesign and implementation of the intelligent feederbasedon theC8051F020MCU, LVDT technology,speedcontroltechnol- ogy upon step motor and fi
2、eld bus technology. Key words: Intelligent instrument; Flow control; MCU; Networking 19 68 GPRS 1 1 0.4-20t/h 0.5% 2 h FF11F1 F(LVDT) LVDTd FK1d(1) C8051F020SOC LVDTA/ D fifitiQ Qditi F=K 2 f K 2 (2) fi=Kdi(3) Q=fiti(4) QKditi(5) 1 Method 79 20065 Q PID (5)di 2 2 3 Cygnal C8051F020 37 MCU 3 3.1MCU M
3、CU ADCDAC4-20mA33IO UART ROMSRAM C8051F020 64KB FLASH4352B SRAM ADCDAC812ADC212DAC I/O64I/O MCS513.3VI/O 5VJTAG 3.2 42819264 3.3 4 MSISchaevitz LVDT 0.25%AD598LVDT1.25V C8051F020 12ADCAD 3.4 MCU64 100kHz 3.5 844 16I/O LED16LED 3.6 34-20mA485 ModbusC8051F020 RS232GPRS GPRSPC/PLC 3.7 CPU AC220V 30% 4 PID 5 Method 80 20065 , , FlashROM 5 0-20t/h 0.5% 5 060318 1982 GPRS1979 GPRS 1. C8051FCM.: ,2005. 2,.LVDTAD598 .J.1998(10):63-65. 3. http:/. 4,J.2001(9): 64-65. 5CYGNAL. C805 1F02x Family Datasheet R1. 1, 2002.l.