公开(公告)号：US20140245839A1

公开(公告)日：2014-09-04

申请号：US14275930

申请日：2014-05-13

Applicant: Nordson Corporation

Inventor： Mario Romanin ,  James M. Khoury ,  Joseph G. Schroeder ,  Jeffrey A. Perkins ,  Terrrence M. Fulkerson

IPC: G01F3/38 ,  G01J1/42

CPC classification number: G01F3/38 ,  B05B7/1404 ,  G01F1/661 ,  G01F1/72 ,  G01F1/74 ,  G01J1/42

Abstract: Apparatus for detecting powder flow along a powder flow path includes a light source and a light detector for detecting light from the light source directed across the powder flow path as powder flows through said powder flow path. A circuit receives the output from the light detector and determines an average or RMS of the signal received by the light detector. The circuit may determine whether there is flow or no flow of powder or whether there is a change in flow rate of powder. Preferably, the apparatus is used in combination with a dense phase powder pump, which causes the powder to flow in pulses from the pump outlet into the powder flow path. More preferably, the light source and detector are enclosed in a housing that is connected between the pump outlet and a powder feed hose which supplies powder to a spray gun or hopper.

Abstract translation: 用于检测沿着粉末流动路径的粉末流动的装置包括光源和光检测器，用于当粉末流过所述粉末流动路径时检测来自指向粉末流路的光源的光。 电路接收光检测器的输出，并确定由光检测器接收的信号的平均值或RMS。 该电路可以确定粉末是流动还是没有流动，或者粉末的流速是否有变化。 优选地，该设备与致密粉末泵组合使用，其使得粉末以脉冲形式从泵出口流入粉末流动路径。 更优选地，光源和检测器被封装在壳体中，壳体连接在泵出口和将粉末供应给喷枪或料斗的粉末供给软管之间。