Structure life pointer monitoring system

Abstract

The pointer monitor system for structure lifetime comprises: an electric bridge with a strain sensor fixed on structure surface and a bridge nose, an instrument amplifier, a lowpass filter, an ADC, a DSP, and field bus interface. Wherein, amplifying and filtering the output signal from bridge to send to the ADC convert into digital signal; analyzing real time the residual lifetime by the lifetime analysis algorithm in DSP to transmit by the field bus to a control node or control computer. This invention can be built as the distributed network structure, has small volume and convenient to use.

Description

1. Technical field

[0001] The invention relates to a unit module used for life monitoring and indication of a mechanical structure, which belongs to the intersecting field of mechanical design, engineering mechanics, test and measurement technology, industrial communication and the like. 2. Background technology

[0002] For large structures such as aircraft and ships, the complexity of the service environment and the variability of the load history often lead to sudden failure of the structure and sudden accidents. The safety of structures has always been a common concern and research issue in engineering circles. Structural strength design is usually used to ensure the safe use of the structure, and the data relied on for the design comes from tests conducted in the laboratory using simple samples. Since the difference between the laboratory load and the actual service load is not fully considered, it is difficult to accurately determine the life of the structure during t...

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