接近開關(guān)檢測技術(shù)

1、精選精選ppt精選精選ppt精選精選ppt精選精選ppt精選精選ppt精選精選ppt精選精選pptThe 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 resultin

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

3、als such as ferrite, which do not allow current flow, cannot be detected.精選精選ppt精選精選ppt精選精選ppt精選精選pptThe sensing range is specified for the standard sensing object. If the sensing object is smaller, or is non-ferrous, the sensing range shortens. 精選精選ppt精選精選ppt材料衰減系數(shù)鋼1不銹鋼0.85黃銅0.3銅0.4精選精選ppt精選精選ppt精選

4、精選ppt介電常數(shù)表精選精選ppt 三線式精選精選ppt二線式精選精選ppt1. 當(dāng)檢測物體較小或較薄時，檢測距離要減小。2. 電感式接近開關(guān)的接通時間為50ms，所以在設(shè)計中，當(dāng)負載和接近開關(guān)采用不同電源時，務(wù)必先接通接近開關(guān)的電源。3.當(dāng)使用感性負載（如燈、電動機等）時，其瞬態(tài)沖擊電流較大，可能劣化或損壞交流二線的接近開關(guān)，在這種情況下，請經(jīng)過交流繼電器作為負載來轉(zhuǎn)換使用。4.請勿將接近開關(guān)置于200Gauss以上的直流磁場環(huán)境下使用，以免造成誤動作。5. DC二線的接近開關(guān)具有0.5-1mA的靜態(tài)泄漏電流，在和一些對DC二線接近開關(guān)泄漏電流要求較高的場合下盡量使用DC三線的接近開關(guān)。6.

5、避免接近開關(guān)在化學(xué)溶劑，特別是在強酸強堿的環(huán)境下使用。精選精選ppt物體的定位 開關(guān)位置的確認 連續(xù)通過的檢測 物體的到位/通過 精選精選ppt產(chǎn)品計數(shù) 存在/通過 行程限位 采用電容式開關(guān)液位控制精選精選ppt采用電容式開關(guān)上下限控制 料位的控制 精選精選pptGL-N12 SERIES Low Price Square-shapedInductive Proximity SensorIt achieves a sensing range of 4mmwith a 12mm square-size sensing part. 精選精選pptThe inductive proximity se

6、nsor detects coins passing by it in a game machine. Since there is no contact, it features high reliability and long life. 精選精選pptGD SERIESMetal-sheet Double-feed DetectorThe high-end GD sensing technology reliably detects double feeds of any metal sheet 0.01mm, or more, thick. 精選精選pptDetecting Miss

7、ing Tablet Package in BoxGD-20 checks if each box contains the given number of aluminum tablet packages. 精選精選pptDetecting 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 proxi

8、mity sensor. 精選精選pptDetecting Double Feed of Metal SheetsThe long sensing range GD-20 can detect objects of different materials up to 10mm thick. 精選精選pptGA-10 SERIES GH SERIESAmplifier-separated Micro-size Inductive Proximity Sensorthe sensor head is also extremely small, the smallest being just 2.8

9、mm (GH-2S). 精選精選pptObserving Vibration of Parts-feederThe inductive proximity sensor observes the amplitude of vibration. 精選精選pptDetecting Screws on CassetteAlthough the sensor head is very small, it candetect a metal screw reliably. 精選精選pptGX-USERIESDC 2-wire CylindricalInductive Proximity Sensor 精

10、選精選pptControlling Depth of DrillingThe sensor detects the dog-clutch that determines the depth of drilling. 精選精選pptGP-A SERIESHigh Accuracy Eddy Current TypeDisplacement Sensor精選精選pptMeasuring Gap between RollersWith the high resolution analog proximity sensor GP-A series, fine gap measurement is possible to control the gap between rollers. 精選精選pptMeasuring Iron Shee