| Nowadays,magnetostrictive displacement sensors are widely used in high-precision displacement measurement fields such as automatic control,military industry,aerospace,and other fields due to their advantages of fast response,high accuracy,and strong stability.With the embodiment of the measurement accuracy and advantages in various fields,the accuracy requirements for magnetostrictive displacement sensors are increasingly high.Therefore,the design and research of high-precision magnetostrictive displacement sensors has extremely important significance.In this paper,the related hardware design and software system design are proposed to improve the performance and detection accuracy of magnetostrictive displacement sensors.Starting from the basic working principle and output voltage model of the magnetostrictive displacement sensor,this paper analyzes the accuracy error and analyzes a series of factors that affect the detection accuracy of the magnetostrictive displacement sensor,providing a theoretical basis and direction for future research in this topic.Then,by considering the influence of skin depth,the output voltage model of the magnetostrictive displacement sensor considering skin effect is established.The selection of excitation pulse signals is simulated to obtain the optimal parameter selection range.Then,starting with the hardware and software parts of the magnetostrictive displacement sensor,the hardware circuit and software system as well as the host computer communication are designed.The hardware circuit part includes the power supply circuit,excitation circuit,signal processing circuit,storage circuit,and main control circuit.Isolation modules are added to the excitation circuit and signal processing circuit,which improves the stability of the magnetostrictive displacement sensor system,In the main control circuit,DSP2812 is used as the main control chip,which not only improves the overall operating frequency of the system,but also makes signal processing and transmission more accurate.The software section provides a detailed introduction to each functional module.Regarding the communication between the system and the host computer,this topic selects a monitoring system based on CAN communication,which has the advantages of strong real-time performance,stable data transmission signals,and strong anti-interference ability.Finally,through the establishment of an experimental platform for verification,the experimental results were analyzed to obtain the relevant parameters of the optimal excitation pulse signal,and experiments were conducted on the linearity test of the magnetostrictive displacement sensor.Finally,the linearity was obtained to be0.0294%,meeting the accuracy requirements.This paper studies the influence of excitation pulse signals on magnetostrictive displacement sensors,deeply analyzes the parameter design of excitation pulse signals,and conducts simulation.Based on the hardware and software parts of the design,experimental verification is conducted to deepen the understanding of the essential issues of magnetostrictive displacement sensors,improve the performance and detection accuracy of magnetostrictive displacement sensors,and provide high-performance The design and research of high-precision magnetostrictive displacement sensors provide a direction. |
