Abstract
This paper introduces a method of thermostatic oscillator data transmission system which is based on embedded TCP/IP technology, while most thermostatic oscillator products don't have such a system of network data communication. The TCP/IP technology is used to achieve remote monitoring. It also uses the algorithm of PID and PWM for temperature and speed control, involving hardware and software design.
Highlights
The data transmission in the Ethernet is MAC addressed rather than IP addressed
The TCP/IP protocol is a connection-oriented, reliable end-to-end communication protocol. It is divided into four layers, namely: network interface layer, network layer, transport layer and network, as shown in figure 3
The data based on the TCP/IP protocol can be divided into three stages: connection, data transmission and disconnect
Summary
A thermostatic oscillator ( called a shaker) is a thermostatic biochemical instrument whose temperature and speed can be controlled. The system uses the National Semiconductor company DP83848 single road 10/100Mb/s Ethernet transceiver and Ethernet interface RJ45 which support 10MBit and 100MBit adaptive network speed to connect to the communication module. 3. Network communication module design a) Ethernet hardware implementation The CPU of the system uses LPC2368 by Philips. The main frequency can reach 72M/Hz with an internal Ethernet integration module which supports 10M or 100Mbps PHY devices This system's Network Interface Card(NIC) is a 10 Mb/s or 100Mb/s single physical transceiver, which contains an Ethernet intelligent power and has low power usage. On receiving confirmation of receipt FIN packets, a packet of reset is sent to achieve active disconnection This system's communication process is divided into 4 main steps: The first part is a network which is composed of DP83848 chip and RJ45 hardware interface. Network communication processes as shown in figure 4: 4. Speed and temperature control
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