Piezoelectric material for pressure detection in cable sheath layer and manufacturing method thereof

Abstract

The invention relates to a piezoelectric material for pressure detection in a cable sheath layer and a manufacturing method thereof. The piezoelectric material is made of the following raw materials in parts by weight: 30 parts-35 parts of 3J33 spring wire with a diameter of 0.06mm-0.07mm, a thickness of 0.05mm wide 0.8mm Pb 0.95 Cr 0.02 Ca 0.03 [(Ni 1 / 3 Nb 2 / 3 ) 0.5 · Zr 0.2 · Ti 0.3 ]O 3 3-4 parts of crystal tape, 5-8 parts of methacrylate, 0.2-0.3 parts of initiator, 1-2 parts of accelerator, 0.5-0.8 parts of stabilizer, 10-15 parts of polyurethane glue share. The piezoelectric material used for pressure detection in the cable sheath layer of the present invention has high sensitivity, strong anti-vibration ability, and is closely combined with the core material and the surface layer rubber.

Description

technical field [0001] The invention relates to the field of electrical materials, in particular to a piezoelectric material for pressure detection in a cable sheath layer and a manufacturing method thereof. Background technique [0002] Cables are used to transmit electric (magnetic) energy, information and wire products that realize electromagnetic energy conversion, and play an extremely important role in modern industry and people's daily life. In fact, more than 95% of cables fail due to the following three reasons: 1. Mechanical damage: the outer sheath of the cable is often torn or crushed, and the surface of the sheath without cracks has burrs or friction marks; No signs of damage, but partial or complete cracking of the wire insulation inside the cable. If it is not a complete failure, it will lead to leakage, tripping and downtime. Analysis of possible causes: sharp rocks, mine collapse, sharp edge of winch cable drum and overload. 2. The bending radius exceeds t...

AI Technical Summary

Problems solved by technology

2. The bending radius exceeds the recommended value: When the cable is bent and its bending radius is much smaller than the bending radius recommended by the manufacturer, the internal components of the cable are prone to mechanical damage

3. Kinks: Kinks are initially caused by knot loops, most often when the cable is "pulled" from a fixed reel, and cannot be easily undone

Kinking can cause permanent "weakness"

[0003] In fact, we can find that these three failure principles can be prevented by setting a long-distance pressure detection device inside the cable or finding the failure point after failure, but in the prior art, due to the Curie temperature of the piezoelectric material itself and almost all sensitive piezoelectric materials are crystals, which are brittle and have a small expansion coefficient, which makes it completely unmatched to the environment in which cables are used.

Because the crystallized piezoelectric material is hard and brittle, it cannot be organically combined with cables in the prior art, and the obtained product has low pressure detection sensitivity and poor vibration resistance