The Research On The Basis Of The Sensor Online Detection System Of The Bus

This subject study meaning lies in adopting software engineering and bus technology to raise accuracy and dependability of the detection system, The structure, hardware equipment, construction cost and maintenance cost of the system are reduced.This subject designs the detection system, including mainframe program, auxiliary machinery hardware and program, system bus and sensor design.The mainframe is one PC, it monitors a lot of sensors in manufacturing line, and notes down operation conditions of equipment on line. The mainframe deals with the gathered data and produce data report historical curve and print the result; the auxiliary machinery inlay MCS-51 series one-chip computer, it not only is provided with signal measuring, A/D conversion and communication function, but also is provided with data storing, data processing and self calibration; The bus adopt RS-485 bus standard, RS-485 bus communication performance is fine and its structure is simple, it can connect 32 auxiliary machineries, and according to actual demand a set of communication is make; Sensor adopts electric thermocouple and platinum resistance, in allusion to high and low temperature measurement.According to multitasking characteristic of Windows, mainframe program adopt multiprocess technology, and construct the communication process through Active. The main process is responsible for data processing and responds consumer operation, and the communication process is responsible for data transfer with all auxiliary machineries. This method ensures data gather real-time character and system controllability.Data gather module design is based on serialization. Through simplifying the circuit design the dependability of the module is improvised; through serial component programming, the adaptability of the module isstrengthened.Auxiliary machinery and sensor are relatively independent, through changing sensor type, the systematic range of application is expanded, many kinds of parameters can be detected.The detection system has perfect function, the structure is simple, the cost is cheap, and the maintenance is convenient. It is suitable for multi parameter measuring of equipment and for production measure online of small business production line.