A kind of sensor preparation liquid and its application

Abstract

The invention provides a sensor preparation solution, the main chemical components include piezoelectric powder, magnetic sensitive material, organic silicon, epoxy resin and binder; the volume ratio of the chemical components is 5%-50% of the piezoelectric powder , epoxy resin 1%‑30%, magnetic sensitive material 5%‑15%, silicone 20%‑50%, adhesive 1%‑10%. Through the mixing of high-frequency magnetic materials and piezoelectric materials, combined with the action of high-frequency magnetic fields, the uniform penetration of the preparation liquid inside the cable and the functions of dust removal and descaling are realized, which solves the problem that the wire core is not fully considered in the existing cable aging repair process Omission of impurities and accumulation of carbon particles in the discharge of the oxide layer and insulating layer; at the same time, it can be used as a cable sensor, using the wires in the cable to realize the detection signal transmission, that is, the combination of mechanical-electrical signal conversion technology using electromagnetic coupling and piezoelectric materials , forming a typical electromagnetic coupling and surface acoustic wave composite sensor, which can be used as both an analog sensor and a digital sensor.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a sensor preparation liquid and its application, in particular to a cable sensor preparation liquid and its application. Background technique [0002] At present, sensors have been widely used in gas, pressure, ultrasonic, and vibration. With the popularization of integrated circuit technology, various micro-film sensors have appeared, which are widely used in industrial and civil economic fields. [0003] However, there is still another vacancy in the current direction of sensors based on piezoelectric materials, that is, when the monitoring area is narrow or the monitoring area is large, the existing sensors made of piezoelectric materials often cannot meet the actual needs. [0004] The traditional piezoelectric cable is only a single-core cable with a coaxial structure. There is piezoelectric material between the cores, but there is a thick insulating layer between the core and the shi...

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Problems solved by technology

[0003] However, there is still another vacancy in the direction of sensors based on piezoelectric materials, that is, when the monitoring area is narrow or the monitoring area is large, the existing sensors made of piezoelectric materials often cannot meet the actual needs.

[0004] The traditional piezoelectric cable is only a single-core cable with a coaxial structure. There is piezoelectric material between the cores, but there is a thick insulating layer between the core and the shielding metal layer, the operating frequency is narrow, and its own flexibility is poor. , can only respond to the deformation caused by heavy pressure, so that the existing piezoelectric cables can only be used in low-frequency occasions with large pressure values ​​(such as tens of kilograms to hundreds of kilograms), such as ground pressure of human body ground invasion, car security inspection, etc. detection, but cannot be used as a high-sensitivity sensor for detecting gaps, high-frequency vibration, temperature, etc.

[0005] A typical application of this patent is: for the monitoring of a narrow and long area, such as the internal defect monitoring of bridges, the existing micro sensors need to be arranged with multiple installation points, or some monitoring locations need to be considered to save the number of sensor points, which is obviously not A very effective solution, because the number of sensors is too large, there will inevitably be problems of mutual cooperation between sensors, networking and mutual interference of information. If the monitoring points are dense and the sensors in some areas do not work or work abnormally, it may affect the Misjudgment of monitoring results

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