TWO CHANNEL PIEZE CONVERTERS MEASUREMENT OF VIBRATION ACCELERATION CAUSED BY VIBRATION OF AGRICULTURAL KNOTS AND UNITS

Abstract

The depreciation of the existing equipment and the high cost of the new one are encouraging enterprises to switch to servicing machines according to their actual condition. This is impossible without the use of diagnostic systems and diagnostic monitoring, which would allow detecting defects in the early stages of their development. Diagnostic systems are mainly at the stage of initial research and experimental operation. The inertia forces of various unbalanced masses (threshing and grinding drums, cutting assembly units of combines, etc.) have the greatest influence on the occurrence of vibration in agricultural machines. Domestic and foreign experience shows that one of the most important means of improving the quality, reliability, durability and economic efficiency of using mechanical equipment is the use of vibration diagnostics systems, eliminating timely damage to the mechanisms of components and assemblies. There are many reasons that cause increased vibration, which indicates the presence of damage to components or assemblies is one of the main causes, increases the rate of wear and damage to the assembly units of the working mechanisms. With the help of vibration diagnostics of the state of mechanical components and assemblies, direct control of dynamic force action is carried out, so that it is possible at an earlier stage to detect and prevent a malfunction or defect. Thus, damage to individual elements of agricultural machinery aggregates causes an instantaneous change in the level and frequency characteristics of the vibration spectrum. The purpose of this article is to propose the use of a two-channel primary transducer for measuring vibration velocity with the aim of improving its accuracy characteristics.

Keywords

• vibration
• vibration acceleration
• vibration diagnostics
• sensor
• out-of-band interference
• operational amplifier