Measurement method and system based on negative Poisson's ratio structure

Abstract

The invention discloses a measurement method and system based on a negative Poisson's ratio structure. A light source, the negative Poisson's ratio structure and a photocell are sequentially arranged in parallel, the negative Poisson's ratio structure is used as a substrate to be in contact with a measured object, when the measured object deforms, force is applied to the negative Poisson's ratio structure, the negative Poisson's ratio structure generates elastic deformation, light emitted by the light source irradiates on the photocell through the negative Poisson's ratio structure after elastic deformation, electric signals of the photocell are collected through the data collection device, and the measured size is obtained through the relation between the electric signals and the measured size. The selectable structure is flexible and diversified, and the overall design is simple and convenient; the components are mutually independent and are not physically connected, interference and noise transmission can be effectively reduced, and the measurement precision is high.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a measurement method and system based on a negative Poisson's ratio structure. Background technique [0002] The existing force measurement method or system usually consists of a sensitive element, a conversion element and a post-processing circuit. Establish a one-to-one correspondence between them, and obtain the magnitude of the measured force by obtaining electrical signals. The existing displacement measurement method or system is partly similar to the measurement of force. Its principle is to use the relationship between displacement and capacitance, eddy current or inductance, and convert the displacement into the change of capacitance, eddy current or inductance, and then by The post-processing circuit outputs, and finally establishes a one-to-one correspondence between the displacement and the electrical signal, and obtains the magnitude of the measured ...

AI Technical Summary

Problems solved by technology

Various types of sensors designed based on the above force or displacement measurement methods usually have the sensitive element and the conversion element in contact, which greatly restricts the design and preparation of the sensitive element and the conversion element, and because the two need to be in contact with each other , the propagation of noise and interference between the two is inevitable, which affects the measurement accuracy of the sensor

In some occasions where the measurement space is limited, the installation is difficult, the use is inconvenient, the environmental requirements are high, and the subsequent problems of high price or inappropriate volume of the measurement equipment have caused great inconvenience to the measurement of force or displacement.

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