Remote Data Acquisition System Based on Arm Processor

Data acquisition system is an embedded system, which collects the data at predefined time intervals from different sensors for different physical measurements like temperature, vibration, light, Voltage variations, etc. In fact, anything that you need to measure. In stand-alone data acquisition system, the output may be in the form of display, buzzer, memory storage devices etc. These devices placed in different locations are used to collect the data and, this data can be transmitted to centrally located PC servers, for further analysis and storage via different communication mediums TCP/IP. This can also be called as Remote Data acquisition system. The microcontroller based embedded device that collects the data from the sensors and transmit to remote PC server via modem .The main purpose of using IP, is to transfer the collected data from different locations and to overcome the limitation of serial communication. This data acquisition system consists of two parts Control unit and    Communication unit. The control unit is having one micro-controller interfaced with A to D converter, which converts analog signals to digital form. The microcontroller will be interfaced with modem and then the data is sent through LAN OR WAN.