Coupled external mounted steel stay rope force detection device and method

Abstract

The invention discloses a coupled external mounted steel stay rope force detection device and a method. The device comprises an excitation assembly and a winding displacement coupling sensor, wherein the excitation assembly comprises a magnetic core, an excitation coil with a capacitive discharge circuit is sheathed on the magnetic core, a first magnetic pole and a second magnetic pole are arranged at two ends of the magnetic core and are respectively provided with a first press plate and a second press plate, the first magnetic pole and the first press plate are detachably connected, the second magnetic pole and the second press plate are detachably connected, a first clamp hole is arranged at a connecting part of the first magnetic pole and the first press plate, a second clamp hole is arranged at a connecting part of the second magnetic pole and the second press plate, and round lining pads are arranged on the inner walls of the first clamping hole and the second clamping hole. The method comprises the following steps that the device is used for detection, and in addition, magnetic feature curves of a steel stay rope to be detected are obtained; the device is used for detection, in addition, a group of standard magnetic feature curves are obtained; and the magnetic feature curves of the steel stay rope to be detected are compared with the group of standard magnetic feature curves to obtain the tension in the steel stay rope to be detected.

Description

technical field [0001] The invention relates to magnetic physics, electrical engineering, and intelligent detection technology of ferromagnetic materials, in particular to the measurement of tensile stress or tensile force of steel cables or steel rods in the field of structural health monitoring, and also to the magnetic mechanics effect and magnetization of ferromagnetic materials characteristic. technical background [0002] As the core component of various bridges, stadiums and other important building structures, the safety of steel cables is very important. Monitoring the tension of steel cables is an important means to ensure their safety. The current detection methods mainly include: [0003] 1. Pressure measurement method [0004] Also known as the jack method, it detects the tension by measuring the oil pressure when using a jack to stretch the steel cable. The oil pressure can be measured by a pressure gauge or a pressure sensor. This method is suitable for det...

AI Technical Summary

Problems solved by technology

[0015] The more mature cable force detection sensors at home and abroad are all sleeve-type magnetic flux sensors, which can only be put on during tension construction to meet the online detection in the use stage , not only wastes a lot, but also has a limited lifespan. More importantly, a large number of active steel cables are not equipped with such sensors

Although it is possible to make magnetic flux sensors or inductance sensors by on-site winding, this method has problems such as difficulty, time-consuming, inconsistent detection and calibration states, etc.

[0016]2. Low detection sensitivity and poor repeatability

[0017] Although magnetic flux sensors or inductance sensors utilize magnetomechanical effects, they only measure a single point parameter on the magnetization characteristic curve of ferromagnetic materials, that is, a certain operating point Nearby magnetic permeability or inductance, so there must be problems of low sensitivity to pulling force and poor measurement repeatability

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