Research On Virtual Part Dimention Measurement System Based On Embedded Technology

Part dimention measurement occupies a very important position in modern industry production. With the improvement of people's life in recent years, increasing demand for higher product quality has been proposed. Therefore, improving the part dimention measurement technology is equivalently imminent. Currently, most domestic manufacturers still use the traditional methods to detect the part dimention. But it is really a way of low accuracy, high cost, low efficiency, labor-intension,deficient flexibility, and so on. While the waste and defective products has been detected in production, they will be directly classified as deserted products, which will lead the enterprise to confront a huge economic losses. For large enterprises, the testing equipments with high precision and high automation used in the production are mainly imported, which are expensive and difficult to maintain and repair. Therefore, it is really great significance to do some research on part dimention measurement. In the paper, we will use the theory of statistical process control to reduce the unqualified rate of parts. And the principle of"prevention beforehand"will be applied in this research, which can make the parts stay in the state of statistical control and ensure product's performance, life, reliability, security and stability. This topic research is combined by the embedded technology and virtual instrument technology with the current size detection technology to explore a new equipment with small volume, low cost, high reliability and practicality. It can replace traditional testing methods, improve processing production in enterprises, enhance the detection efficiency, and ensure the accuracy of parts, reduce labor costs and promote economic efficiency of enterprises.Virtual part dimention measurement based on embedded technology run on 32-bit ARM microprocessors with the operating system named Windows CE. It was developed on the platform of Visual Studio 2005. Based on the sensor technology and serial communication, it uses the database of SQL Server CE to achieve the storage capability, which can finally analyze and process data through the theory of statistic process control. The techniques of Object Oriented Programming (OOP) with the modular design concept have been used in the development of this system. This instrument is divided into four modules, including communication module, memory module, analysis module and display module, which has formed a virtual integrative detective equipment. This topic research is a new attempt and exploration for virtual instrument technology used in the detection of static variabration. And it has opened up a new research direction for virtual instrument techonology. The experiment indicated that the techonology combined with part dimention measurement and statistic process control theory applied in part dimention measurement system is feasible. It can improve the accuracy and efficiency of part dimention measurement, which can also achieve automative measurements.