Wide-angle measurement based on arc-cantilever beam interrogated by open-ended hollow coaxial cable resonator

In this work, an inclinometer based on an arc-cantilever beam for wide-angle measurement is proposed and demonstrated, which is interrogated by an open-ended hollow coaxial cable resonator (OE-HCCR). A novel arc-cantilever beam structure, featuring a copper ball within the cantilever channel and a fixed metal plate at the center, serves as an inclination transducer. This configuration enables highly sensitive detection of inclination variations by translating inclination into the displacement of the copper ball and cantilever, which subsequently modulates the OE-HCCR's resonance frequency. A high inclination sensitivity of −1.265×10−4 GHz/° within a wide-angle range of −30° ∼ 30°, along with resolution higher than 0.011° and hysteresis error of 1.302 %, is experimentally demonstrated. Additionally, low-temperature crosstalk is achieved through temperature compensation. The proposed inclinometer has the potential to monitor environmental inclinations in various fields, due to the advantages of easy fabrication, high inclination sensitivity and resolution, and enhanced high-temperature tolerance. [Display omitted] •A microwave inclinometer based on arc-cantilever beam and open-ended hollow coaxial cable resonator is proposed.•The all-metal structure facilitates the advantages of high mechanical robustness and enhanced high-temperature tolerance.•A high inclination sensitivity of −1.265×10‐4 GHz/° within a wide-angle range of ‐30° ∼ 30° is experimentally demonstrated.•Low-temperature crosstalk is achieved through temperature compensation.