In order to solve the problem that the traditional level sensor can not monitor the material position of the multiple material,a new design scheme of the multiple material position monitoring device for the closed container is put forward.The monitoring device is composed of the LED luminescent scale and radar material level meter.The monitoring method can simplify the monitoring process and improve the reliability of monitoring.The monitoring device with cleaning wheel can not only ensure the sealing of the container,but also improve the monitoring quality.Mechanical analysis of the cleaning ...