This paper introduces one ultrasonic distance measurement device based on single chip processor and mainly describes its hardware circuit and software design. The ultrasonic distance measurement device has many merits such as simple structure, low-cost, high-accuracy, microminiaturization, digital display and so on; this result reaches the expected target. The practice result shows that the ultrasonic telemeter has very high generalizing value.

Introduction of a intelligence control system of remote temperature & moisture adjustment based on single-chip computer. It explains hardware flow diagram, module structure and system software process flow diagram based on principle of power line carrier transmission and humiture control. With STC12C5404ADsingle chip computer and DHT21 as main control chip and humiture collection chip, the system hard ware is characterized by efficient and strong capacity of resisting disturbance compare to traditional humiture checking system.

Database is the foundation of making IETM, database structure has great influence to the TETM production method and use efficiency. Aiming at the defects when using relational database to process XML documents, According to the characteristics of IETM data module and information objects under S1000D standard, native XML database needed to meeting the conditions were analyzed, using a native XML database technology to structure IETM data Module and information set; and giving data module code, information objects, information control composition structure codes of the data module structure, gives the design method of IETM database storage and index model, which can effectively avoid the traditional the deficiency of IETM database support for XML technology.

The salient effect of the rotor structure of the interior permanent magnet synchronous machine (IPMSM) makes it more suitable for running in the zone that exceeds the rated revolution by flux-weakening control. Therefore, the closed-loop speed regulation system composed by IPMSM can achieve excellent dynamic performance, high precision and wide speed performance. On the basis of the mathematical model of d / q coordinates of IPMSM, this paper discusses the control proposal of IPMSM: to control the current of d / q axis to maximize the speed range.

In order to reduce the costs during publish and maintenance of equipment technical information, and improve the effective management and application of equipment support information, the key technology of preparing IETM based on GB/T24463 is introduced, and the development process and structure of IETM system based on GB/T24463 is analyzed, developing an IETM solution integrating compiling, reading and management in one, and with the design and achievement of all functional modules of IETM system being discussed in details.