Development And Experimental Study Of Modular Machaniacl Self-decoupled Wireless And Passive Force Sensor

As an important part of intelligent and modern construction,sensors are the basis for industrial inspection systems and motion control,and are an important component of social development and technological progress.The development of multidimensional force sensors has become more mature,however,in special situations such as defence,medical and precision machining,multidimensional force sensors at this stage have their own properties that lead to high wiring requirements,incomplete decoupling methods and poor adaptability to meet the growing demands of technological development.In addition,the integrated structure of multidimensional force sensors directly leads to a fixed number of dimensions from manufacturing to application,but with the increase in industrial flexibility,the flexible use of multidimensional force sensors has become an urgent problem.Based on the above problems,this paper proposes a modular design concept based on a combined mechanical self-decoupling wireless passive multidimensional sensor,which solves the problem of inter-dimensional coupling of multidimensional sensors from the root and enables flexible expansion of the axial force,bending moment and torque dimensions of the sensor.Firstly,this paper analyses the wireless passive detection principle of the combined modular sensor based on the magnetostrictive effect,and establishes a mathematical model of the magnetoelectric conversion relationship;at the same time,the modular sensor design scheme proposed in this paper is discussed.The mutual inductance phenomenon between the detection coils in the detection system is analyzed,and the relevant parameters are simulated and analyzed by MATLAB software.The specific self-decoupling design requirements and working methods of the momentaxial force module and torque module are described,and the core components of the two modules and the core idea of modular design are elaborated.After machining,assembly and commissioning,the modular sensor prototype was finally obtained,meeting all the technical requirements presented in this paper.Secondly,in order to further verify the self-decoupling performance and modular design idea of the modular sensor proposed in this paper,the mapping matrices of the bending moment-axial force module,the torque module and the overall elastomer strain and external force of the modular sensor were established by applying the knowledge of theoretical mechanics,and the overall mechanical modeling of the modular sensor was completed to further verify the self-decoupling capability and the correctness of the modular design of the modular sensor proposed in this paper from the theoretical level.Finally,the sensor is experimentally studied by the existing comprehensive experimental loading platform in the laboratory,including: the calibration experiment of the test bench,the loading experiment of the bending moment-axial force module,the loading experiment of the torque module,the loading experiment of the combined modular sensor and the stability experiment of the combined modular sensor.The experimental results show that the proposed combined modular sensor has the ability to decouple the bending moment,axial force and torque,and the individual modules also have good decoupling ability,while the overall stability of the sensor is good.