基于霍尔开关的磁性浮子式液位传感器设计

针对传统的干簧管式液位计接触点易产生抖动、长期稳定性差等缺点,设计了一种利用开关式霍尔元件作为敏感元件的液位传感器,详细介绍了其工作原理和设计方案,并利用ANSYS软件对磁性浮子进行了磁场仿真计算,通过分析可根据测量精度确定所需永磁体大小,简化工艺流程,缩减了工作量.该传感器可根据需要输出标准电流信号4～20 mA或数字通信RS-485,并可配备LED现场指示器,实验表明:该传感器具有有效距离大、不易受干扰、响应速度快、可靠性高等特点.

Design of magnetic float type liquid level sensor based on Hall switch

Aiming at shortcomings of traditional level gauge using tongue tube is easy to produce vibration,and has poor long-term stability,design a novel liquid level sensor using Hall switch as sensitive element.Working principle and design scheme are introduced in detail,and magnetic field of the magnetic float is simulated using ANSYS software.Through analysis,the size of permanent magnet can be determined according to measurement precision,process is simplified and workload is reduced.The sensor can output standard current signal 4 ～20 mA and digital communication RS-485,according to the need,and it also can be equipped with LED indicator.The experiment shows that the sensor has many characteristics like large effective distance,less interference,fast response rate,and high reliability.