一种抗干扰开停传感器的研制

Development of an On-off Sensor with Anti-interference

针对现有的开停传感器在强电磁场干扰环境中易发生误判断而导致监控不准确的问题,设计了一种应用磁感应原理、抗强干扰的开停传感器,介绍了该传感器的硬件结构及软件设计,重点阐述了该传感器的抗干扰设计原理,即为设备的开和停设置如下条件:开停传感器上电工作后,初始状态为关,当传感器采样值大于开判断线一定次数后,传感器判定为开;当传感器在开的状态下,采样值小于关判断线一定次数后,传感器才判定为关。试验及应用结果表明,该抗干扰设计避免了瞬间强电磁干扰带来的传感器反复开停及误判断问题。

In view of the problem that existing on-off sensors are easy to falsely judge in strong.electromagnetic field environment to cause inaccurate monitoring, a type of on-off sensor was designed using magnetic induction principle and high anti-interference technology, hardware architecture and software design of the sensor were introduced, and design principle of anti-interference of the sensor was introduced emphatically, namely following on-off conditions are set for the sensor： when the on-off sensor is powered on, its initial state is off, and when sampled value of the sensor is greater than a certain value of on judgment line in several times, the sensor determines the electromechanical equipment is on. When the on-off sensor is in on state and sampled value is less than a certain value of off judgment line, the sensor judges the electromechanical equipment is off. The results of experiment and application showed that the strong anti-interference design avoids problems of repeated on-off and incorrect judgment of on-off sensors caused by transient strong electromagnetic interference.