Stress, strain or temperature abnormal area monitoring sensing element and manufacturing method thereof

Abstract

A stress, strain or temperature abnormal area monitoring sensor element and its manufacturing method belong to the sensor element and its manufacturing method. There are basic composite layer structure and additional composite layer structure; the basic composite layer structure consists of a thin plate on the first layer, a horizontal arrangement of sensitive elements on the second layer, a thin insulating layer on the third layer, a longitudinal array of sensitive elements on the fourth layer, and a fifth layer The electrode of the first layer and the insulating protective film of the sixth layer; the additional composite layer structure layer is composed of the sensitive element array and electrode of the first layer and the insulating protective film of the second layer, which can be added on the basic composite layer structure as required. The sensing element can realize the monitoring of abnormal stress area, abnormal strain area or abnormal temperature area in the two-dimensional plane field, depending on the selection of the sensitive element. When monitoring the abnormal strain area, it is necessary to select a sensitive material with better strain sensitivity. Sensitive element array. The invention has a simple and effective structure; adopts a silk screen printing process, the method is simple and reliable, and the cost is low.

Description

technical field [0001] The invention relates to a sensing element and a manufacturing method thereof, in particular to a stress, strain or temperature abnormal region monitoring sensing element and a manufacturing method thereof. Background technique [0002] At present, the method used for two-dimensional plane stress field monitoring mainly includes the method of thin-film pressure distribution sensor. Compared with the traditional method of multi-point distribution of pressure cells, this method has certain progress, but this kind of sensor is more expensive. The methods used for two-dimensional plane strain field testing mainly include contact measurement method and non-contact measurement method. Among them, the contact measurement method mainly uses multi-point resistive strain gauges for testing. This method has limited layout and large strain gauge size. In addition, each strain gauge has to be connected to the test line, which takes up a lot of space and affects the...

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Problems solved by technology

The contact test method mainly uses multi-point thermistors or thermocouples for testing. This method has limited layout, and each thermistor must be connected to the test line, which takes up a lot of space and affects the accuracy of the test. In terms of space constraints, environmental conditions and Under the influence of equipment requirements and other factors, it is difficult to achieve effective and feasible temperature field measurement

The indirect test method mainly includes acoustic and image processing measurement methods, among which the acoustic temperature measurement technology mainly calculates the temperature of the measured medium based on the principle that the propagation speed of sound waves in the medium changes with the change of the temperature of the passing medium. The method is affected by the medium composition, reconstruction algorithm accuracy, background noise, acoustic wave interference refraction, etc., and its application is often limited; the radiation temperature measurement technology of image processing is based on the functional relationship between the object's different spectral radiation intensities and temperatures. Because the radiation is affected by the scattering and attenuation coefficient of medium particles, the application range of this test method is limited

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