Sensor preparation liquid and application thereof

Abstract

The invention provides sensor preparation liquid. Main chemical components of the sensor preparation liquid comprise piezoelectric powder, a magnetic sensitive material, organic silicon, epoxy resin and a binder. The volume ratio of the chemical components is as follows: 5%-50% of piezoelectric powder, 1%-30% of epoxy resin, 5%-15% of a magnetic sensitive material, 20%-50% of organic silicon and 1%-10% of the binder. Through mixing of the high-frequency magnetic material and the piezoelectric material and combination with the action of a high-frequency magnetic field, the functions of uniformpermeation, dust removal and descaling of a preparation solution in the cable are achieved, and the problems that in the existing cable aging repair process, impurities are omitted due to discharge ofa wire core oxide layer and an insulating layer, and carbon deposition particles are accumulated are solved; and moreover, the sensor prepared by the sensor preparation liquid can be used as a cabletype sensor, detection signal transmission is achieved through a wire in the cable, that is, a typical electromagnetic coupling and surface acoustic wave composite sensor is formed through combinationof electromagnetic coupling and the mechanical-electrical signal conversion technology of piezoelectric materials, and the sensor prepared by the sensor preparation liquid can be used as an analog sensor and can also be used as 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...

AI Technical Summary

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

Images