接近开关检测技术

1、整理ppt1整理ppt2整理ppt3整理ppt4整理ppt5整理ppt6整理ppt7The detection coil located at the front end of the sensor produces a high-frequency magnetic field as shown in the figure . When an object (metallic) approaches this magnetic field, induced currents flow in the metal, causing thermal loss and resulting in th

2、e reduction or stopping of oscillations. This change in state is detected by an oscillation state sensing circuit which then operates the output circuit. 整理ppt8 It cannot detect non-metals in which current cannot flow, since detection is based on thermal loss due to induced current.Also, metals such

3、 as ferrite, which do not allow current flow, cannot be detected.整理ppt9整理ppt10整理ppt11整理ppt12The sensing range is specified for the standard sensing object. If the sensing object is smaller, or is non-ferrous, the sensing range shortens. 整理ppt13整理ppt14材料衰减系数钢1不锈钢0.85黄铜0.3铜0.4整理ppt15整理ppt16整理ppt17介电常数

4、表整理ppt18 三线式整理ppt19二线式整理ppt201. 当检测物体较小或较薄时，检测距离要减小。2. 电感式接近开关的接通时间为50ms，所以在设计中，当负载和接近开关采用不同电源时，务必先接通接近开关的电源。3.当使用感性负载（如灯、电动机等）时，其瞬态冲击电流较大，可能劣化或损坏交流二线的接近开关，在这种情况下，请经过交流继电器作为负载来转换使用。4.请勿将接近开关置于200Gauss以上的直流磁场环境下使用，以免造成误动作。5. DC二线的接近开关具有0.5-1mA的静态泄漏电流，在和一些对DC二线接近开关泄漏电流要求较高的场合下尽量使用DC三线的接近开关。6.避免接近开关在化学

5、溶剂，特别是在强酸强碱的环境下使用。整理ppt21物体的定位 开关位置的确认 连续通过的检测 物体的到位/通过 整理ppt22产品计数 存在/通过 行程限位 采用电容式开关液位控制整理ppt23采用电容式开关上下限控制 料位的控制 整理ppt24GL-N12 SERIES Low Price Square-shapedInductive Proximity SensorIt achieves a sensing range of 4mmwith a 12mm square-size sensing part. 整理ppt25The inductive proximity sensor dete

6、cts coins passing by it in a game machine. Since there is no contact, it features high reliability and long life. 整理ppt26GD SERIESMetal-sheet Double-feed DetectorThe high-end GD sensing technology reliably detects double feeds of any metal sheet 0.01mm, or more, thick. 整理ppt27Detecting Missing Table

7、t Package in BoxGD-20 checks if each box contains the given number of aluminum tablet packages. 整理ppt28Detecting Steel Balls Passing through Metal Pipe The GD series perfectly detects a steel ball passing through a metal pipe, a requirement which has not been met by any beam sensor or proximity sens

8、or. 整理ppt29Detecting Double Feed of Metal SheetsThe long sensing range GD-20 can detect objects of different materials up to 10mm thick. 整理ppt30GA-10 SERIES GH SERIESAmplifier-separated Micro-size Inductive Proximity Sensorthe sensor head is also extremely small, the smallest being just 2.8mm (GH-2S

9、). 整理ppt31Observing Vibration of Parts-feederThe inductive proximity sensor observes the amplitude of vibration. 整理ppt32Detecting Screws on CassetteAlthough the sensor head is very small, it candetect a metal screw reliably. 整理ppt33GX-USERIESDC 2-wire CylindricalInductive Proximity Sensor 整理ppt34Con

10、trolling Depth of DrillingThe sensor detects the dog-clutch that determines the depth of drilling. 整理ppt35GP-A SERIESHigh Accuracy Eddy Current TypeDisplacement Sensor整理ppt36Measuring Gap between RollersWith the high resolution analog proximity sensor GP-A series, fine gap measurement is possible to control the gap between rollers. 整理ppt37Measuring Iro