Database Design on Mechanical Equipment Operation Management System Zheng Qiu1, Wu kaiyuan1, Wu Chengyan1, Liu Lei2

Transcription

1 2nd International Conference on Advances in Mechanical Engineering and Industrial Inforatics (AMEII 206) Database Design on Mechanical Equipent Manageent Syste Zheng Qiu, Wu kaiyuan, Wu Chengyan, Liu Lei2 No.208 Research Institute of China Ordnance Industries, Beijing College of Engineering, Bohai University, Jinzhou, 203 Keywords: echanical equipent; operation anageent; database design; conceptual design; logical design; physical design Abstract. Carrying out echanical equipent operation anageent can iprove the econoic efficiency for enterprises, prevent accidents, ensure production safety, and proote the refor of achinery and equipent aintenance syste. Using coputer syste to anage is the necessary requireents for the inforation age. For the difficulties of syste developent, this paper conducted the database design. Following the database design process conducted the conceptual design, logical design and physical design. Conceptual design using the E-R diagra approach, suggested a link between entities and entity; logic design is based on SQL Server, designed the logical structure for all the tables; physical design about storage structures and access ethods, including the disk hardware selection, data place on the disk, use the index to iprove syste perforance, configuration paraeters and other aspects design. Introduction Mechanical equipent operation anageent with the life cycle of echanical equipent for industrial enterprises as the object of the research, pursuit the ost econoical life-cycle costs of achinery and equipent and the highest overall effectiveness as the goal, scientifically research the coprehensive technical, econoic and regulatory factors. Mechanical equipent operation anageent task is to ensure provide the best technology and equipent, so that production activities based on the best aterial and technical basis. Manage well, use well and repaired echanical equipent, with inial aintenance costs, obtained the axiu perforance. The general trend of echanical equipent operation anageent is odernization, naely Mechanical equipent operation anageent integration, full of coputerization, networking and intelligent. Great significance for developing equipent operation anageent in three aspects [-3]: First, increase econoic efficiency. With odern industrial developent and science and technology, achinery and equipent toward large-scale, continuous, high-speed and autoation direction, large achinery and becoe a odern large-scale production of key equipent, once the downtie will result in discontinued, causing huge econoic loss. Equipent operation and anageent can reduce accident losses and extend the aintenance period, bringing considerable econoic benefits; the second is to prevent accidents and ensure safety in production. Machinery and equipent during operation without failure is ipossible, absolutely safe and reliable equipent does not exist, the best ethod is to detect anoalies and failures to grasp the developent trend of equipent to take tiely and appropriate control easures to prevent ajor accidents ensure personal and equipent safety; third is to proote the refor of the echanical equipent aintenance syste. Machinery and equipent aintenance syste has gone through three stages, naely corrective aintenance, preventive aintenance and predictive aintenance. Corrective aintenance is also known as breakdown aintenance, equipent failure before aintenance. Preventive aintenance is also known as regular aintenance, according to a predeterined tie interval or aintenance cycle, aintenance, adjustent and replaceent of spare parts. Predictive aintenance is also known as condition onitoring aintenance, inspection and test equipent for a planned way, to deterine the health status. This repair ethod can bring significant econoic benefits. The regular 206. The authors - Published by Atlantis Press 385

2 aintenance to the predictive aintenance, saving aintenance costs, reducing aintenance tie and increases the echanical equipent uptie, increase productivity, resulting in huge econoic benefits. Mechanical equipent operation anageent can keep abreast of the operational status of equipent, it is deterined whether abnoral or fault status of Mechanical equipent operation control, predict trends. For the fault has been fored to analyze the severity of the fault, the fault type, location and cause of failure, to take effective control easures as soon as possible. Through the Mechanical equipent operation and anageent, access to Mechanical equipent running status feature inforation, grasp the changes in the operating status Mechanical equipent, Mechanical equipent according to the state to decide whether to require aintenance, saving the cost of Mechanical equipent into the aintenance area. At the sae tie axiize the use of achinery and equipent; iprove the operating efficiency of achinery and equipent. Developent of echanical equipent operation anageent syste is iportant. In this paper, the database design is an iportant part of software developent, to iprove the efficiency and quality of syste developent has great significance. Database Design Process The basic database design process can be divided into four steps, naely needs analysis, conceptual design, logical design and physical design, it is shown in Fig. []. Inforation requireent Business requireent Processing requireent Character of hardware and syste Requireent analysis User requireent Conceptual design Conceptual structure Logical design Logical structure Physical design Fig.. Steps of database design DBMS character The ain task of needs analysis was to investigate and analyze the user's business activities, inforation and processing requireents, as well as a variety of constraints, for database design requireents specification. Conceptual design task is conceptual design of the database structure, deterined fro the point of view of different users to see outside pattern and the outer ode integrated into the overall pattern. Logical design is the overall pattern of conceptual design was converted into the selected database odel, and optiization. The task is to deterine the physical design within the schea of the database. Developent ethodology and inforation syste database design ethodology eployed there is a close relationship, but also with the database odels adopted relevant. Conceptual Design The user needs get in the needs analysis is abstracted inforation structure, naely conceptual odel is the conceptual design process [4]. Conceptual design goal is to reflect the organization's overall inforation needs of database conceptual structure; in accordance with a specific ethod abstract data odel does not rely on any particular achine, that conceptual odel. The concept odel is the inforation structure of each user of coon concern throughout the organization, 386

3 you ust be independent of any coputer data odel [5], a conceptual odel is siple, clear and easy for users to understand, is the language of counication between the user and the database designer [6]. Conceptual design is odeled on the world of inforation, coon conceptual odel ER odel, the results of conceptual design for the syste is shown in Fig. 2. Digital_Code Phonetic_Code Mechanical Equipent Dictionary Equipent_Code Equipent_Nae Exist_Aount Equipent_Code Equipent_Nae Exist_Aount Use_Aount Include Statistical Report Exist Use_Aount Calendar_Tie Good_Tie Work_Tie Task_Tie Task_Ton Good_Rate Use_Rate Ton_Per_Tie Generate_Date_Tie Calendar_Tie Good_Tie Mechanical Equipent Work_Tie Task_Tie Task_Ton Exist Ite Ton_Per_Tie Fault_Aount Machine Account _Good_Rate _Use_Rate Fault_Tie _Ton_Per_Tie Fault_Frequency Total_Good_Rate Fault_Rate Total_Use_Rate Good_Rate Total_Ton_Per_Tie Use_Rate Generate_Date_Tie Fig. 2. Conceptual design on echanical equipent operation anageent syste 387

4 Logical Design Fro conceptual design to the logical database design is an iportant part of the design process. ER odel concept design phase was to reflect the needs of the business data odel, regardless of the specific data odel and DBMS. In order to establish the required database user, conceptual odels need to be converted to a specific DBMS support data odel. The task is to convert a conceptual odel for a particular DBMS process supported by the data odel; we need to consider the characteristics for specific data odel and DBMS perforance [7-9]. Logical design results based on SqlServer are shown in Table below. Table. Logical structure design on teaching anageent syste Mechanical_Equipent_Dictionary _Statistical_Report No Field nae Data type Byte No Field nae Data type Byte varchar 20 varchar 20 2 Digital_Code sallint 2 2 char 4 3 Phonetic_Code varchar 4 3 char 2 4 varchar 3 4 Sallint 2 5 varchar 20 5 varchar 3 6 Equipent_Code varchar 0 6 varchar 20 7 Equipent_Nae varchar 50 7 Exist_Aount int 4 Mechanical_Equipent_ 8 Use_Aount int 4 No Field nae Data type Byte 9 Calendar_Tie int 4 varchar 20 0 Good_Tie int 4 2 char 4 Work_Tie int 4 3 char 2 2 Task_Tie int 4 4 Sallint 2 3 Task_Ton int 4 5 varchar 3 4 Good_Rate decial 7,2 6 varchar 20 5 Use_Rate decial 7,2 7 Equipent_Code varchar 0 6 Ton_Per_Tie decial 7,2 8 Equipent_Nae varchar 50 7 Generate_Date_Tie datetie 8 9 Exist_Aount int 4 _Machine_Account 0 Use_Aount int 4 No Field nae Data type Byte Calendar_Tie int 4 varchar 20 2 Good_Tie int 4 2 char 4 3 Work_Tie int 4 3 char 2 4 Task_Tie int 4 4 Sallint 2 5 Task_Ton int 4 5 Ite varchar 30 6 Ton_Per_Tie decial 7,2 6 _Good_Rate decial 7,2 7 Fault_Aount int 4 7 _Use_Rate decial 7,2 8 Fault_Tie int 4 8 _Ton_Per_Tie decial 7,2 9 Fault_Frequency decial 7,2 9 Total_Good_Rate decial 7,2 20 Fault_Rate decial 7,2 0 Total_Use_Rate decial 7,2 2 Good_Rate decial 7,2 Total_Ton_Per_Tie decial 7,2 22 Use_Rate decial 7,2 2 Generate_Date_Tie datetie 8 388

5 Physical Design Physical design is based on logical design, select the appropriate storage structures and access ethods for each of the relational odel, aking the transaction on the database can be efficiently run. Physical structure design depends on the specific database anageent syste. For Microsoft SQL Server the physical design as follows. () Disk hardware selection. There are any hard drive perforance paraeters, but for access to the hard drive to select the database ainly fro the capacity, speed, cache and other aspects to consider. If you choose a dedicated database server, consider the disk redundant array of devices. (2) The data is placed on the disk. If the data is less, the data can be placed on file; if large aount of data, it is necessary to place on the file group. File group consists of ore than one file in a different physical disk coposition, can iprove query perforance. (3) Using the index to iprove perforance. When there is no index on the colun is accessed, SQL execution tie is ainly consued in the loading and data atching table data, you need to consue a lot of CPU costs and IO costs [0]. (4) Configuration paraeters to ake the database to run well. First, the use of eory configuration options in server eory, ax server eory, ax worker threads, index create eory, in eory per query and so optiize server perforance; second is to use I/O configuration options to optiize server perforance recovery interval. Conclusion With the developent of inforation technology, the ethod that coputer process data undergo the profound changes, SQL Server is a widely used database anageent syste with client/server architecture, can eet business environents require different types of database solutions. Has any significant advantages, such as usability, scalability for distributed organizations, the data warehouse for decision support, closely associated with other server software, and so on. This paper based on SQL Server to design, for syste developent to provide a viable solution, and for iproving the echanical equipent operation anageent level has iportant. References [] Z. J. He, H. D. Cao, Y. Y. Zi, et al, "Developents and Thoughts on al Reliability Assessent of Mechanical Equipent," Journal of Mechanical Engineering, vol. 50, no. 2, pp. 7-86, 204. [2] M. J. Chen, "Maintenance and anageent of echanical equipent fro the perspective of econoic operation," China Manageent Inforationization, vol. 6, no. 0, pp , 203. [3] L. Z. Miao, "Manageent easures for safety operation of echanical equipent," Journal of Henan Science and Technology, vol. 48, no. 6, pp , 203. [4] Baidu Encyclopedia, "Conceptual Structure Design," [5] L. Zhang, L. Ma, "Database Design," Journal of Anyang Institute of Technology, vol. 6, no. 4, pp , [6] Z. Y. Duan, "Database Design Method," Journal of Nanchang College of Education, vol. 20, no. 4, pp , [7] Y. Zhang, "Eliinating Process of Foralization in Logical Database Design," Coputer Systes & Applications, vol. 22, no. 6, pp. 79-8, 203. [8] doc88, "Logical structure design," [9] H. M. Chen, "Logical structure design of database," Fujian Coputer, vol. 28, no. 0, pp , 202. [0] J. S. Yang, C. Zhang, "Effect of index on SQL execution cost," Inforation counication, vol. 27, no., pp ,