The design,type selection,and application of air flow rate measuring system in Huaneng Qinbei Power Plant have been presented,the problems appeared in operation process of units being analysed,and retrofit of the air flow rate measuring facility be- ing carried out.

According to domestic and international literature and the authors several-year-old experiences , the problems about the designing, calculating and regulating of air flow measuring apparatus with multiple nozzles, which nowadays are widely used for air flow measurement in the laboratory, are described in detail.

Design on the automatic measuring device of human body dimensions oriented to clothes customization

Aiming to the measuring device application to CNC roller grinder, this paper introduces several different kinds of measuring devices, analyses their structures, and points out their different application fields.

A kind of parts dimension measuring device controlled by microcomputer is developed.

A new type of AC-DC dual use high voltage measurement device was used, which takes singlechip as the core part, plus out equipment to form a complete device, being able to measure DC, AC, impulse voltages, with measurement results displayed by LED.

To reduce the cost in grounding resistance measurement of grounding grids along Qinghai-Tibet railway,a new grounding grid resistance measurement device was designed.

Based on the improved method, the hardware and the software of measurement device are designed by the chip C8051F021.