Embedded Remote Industrial Monitoring And Control System Software Design And Implementation Of Terminal Equipment

The intelligent instruments and sensor working in industry field are mainly designed in low-energy consumption to use internal battery as power source, also lack of the ability of remote communication. Traditional remote field monitoring system uses manual data acquisition and collection, thus results in low efficiency and high cost. The adoption of terminal devices with the ability of remote communication and control, the monitoring network can be upgraded to automatic data acquisition and transmission. The new added terminal device should provide the ability of power management with high efficiency, and stable wireless access to overcome the interference of mobile communication channel.The remote monitoring terminal device with ultra-low power consumption based on MSP430 micro control unit was researched in detail. The embedded software was developed in C language, with the implementation of GPRS wireless module driving kit, low power consumption management, intelligent instrument and analog sensor management, also the system parameters configuration.Some critical algorithm and implementation was introduced in detail, as follows①Software framework design and implementation. MSP430 is such a micro control unit, which can provide strong calculation ability and ultra-low power consumption, but the total 2K byte space of RAM limit the application of Real Time Operation System. Thus a foreground/background software framework was adopt, along with nested interrupt service subroutine, the embedded software exhibits excellent balance between real-time response with low power consumption.②Low power consumption ability. The wanted terminal device is placed in industry field and should provide the ability of very low power consumption for the lack of regular electronic power supply. By careful analysis the execution of each sub-routine, also the dynamic work mode of MSP430 considered, the power consumption of control core function was reduced to acceptable level. Also, the power supply for peripheral circuit and interface circuit was carefully designed with the demand of control, and the total efficiency of power usage was promoted. ③Wireless communication module driving implementation. The terminal device using M590 as the wireless communication module to implement GPRS access to remote center, and the driving of M590 was realized by inter-active AT command operation. The automatic heart-beating package and connection status maintenance was adopted in driver software, to promote the stability and reliability of GPRS communication between terminal device and remote center.④Remote monitoring function implementation. The monitoring protocol was design elaborately with software engineering technology, including remote device monitoring, parameter configuration and system management.⑤System management. The system management ability implements the necessary low-level function driving, parameter configuration and storage method for remote monitoring terminal device. The system level test result shows that the embedded software accords the requirement of remote monitor terminal device well, and the flexibility, reliability provided by this device can promote the automatic operation level for traditional remote monitoring system, and can bring enormous economical benefit and engineering reference value.