Novel synthetic iron (III) oxide-based force sensor

Abstract Recent progress observed in 'powdered composites', considered as advanced electrical inductance materials, brought some promising applications in flexible tactile, pressure and force sensors, which can be based on compressed metal oxide powder mass materials. Therefore, in this paper the evaluation of the resistance of force-sensitive material – synthetic iron (III) oxide powder – by implementing this material into the design of two force sensors is described. Two types of sensors with different external (height, diameter, construction) parameters were investigated. Sensor responses were evaluated by performing tests in static, long-term load and cyclic modes. Experimental results of loading cycle measurements revealed the hysteresis and nonlinearity of the sensors. Obtained sensors sensitivity, hysteresis, response time, and deformation dependencies on the applied compressive force promises a practical possibility to use the synthetic iron (III) oxide powder composite as sensitive material for force and pressure sensors. Developed sensors have simple construction, very high mechanical resistance, are very resistant to wear and environmental impact and can operate at high temperatures. The results of experimental research have defined the area of the possible implementation of the sensors based on iron (III) oxide powders. The active substance in the form of a powder is especially relevant in mechanical systems and robotics. Size and shape of powders can be easily adjusted to the working area parameters, the operating temperature range (can be up to 600 °C), and other industrial needs.