Starting with the domain walls changing of magnetization process for the cable tension sensor, the influence mechanism is studied between temperature and magnetization. In this paper, making Jiles-Atherton (JA) model as the theoretical basis and introducing the Curie temperature as additional parameter, a magnetic-thermo coupling model for the magnet elastic cable tension sensor is constructed by analyzing the temperature and the physical parameters of the model, followed that, a mathematical analysis is used for the model as the stress or temperature is changing. Compared the analytical results, the effects of the temperature to magnetization is obvious when the sensors is in magnetization rising or decline stage, and a reasonable magnetization working point not only can reduce the interference but insure the sensitivity to stress changing of the sensor.

Magneto-elastic cable tension sensor have a number of advantages, it will be ideal method to measure cable tension in large span cable-bridge, but the sensor is sensitive to temperature, so the temperature influence is not negligible to sensor. In this paper, the principle of cable tension sensor based on magnetic-elastic effect is introduced, the common temperature compensation technique are detail analyzed. A novel method of temperature compensation by adjusting the bias magnetic field is put forward, by theoretical analysis and experiment, indicated that it is feasible to compensated the temperature influence.