![สัญญาณรบกวนมีผลต่อเครื่องตรวจจับโลหะ](https://www.atech.co.th/wp-content/uploads/2022/08/สัญญาณรบกวนมีผลต่อเครื่องตรวจจับโลหะ.png)
คุณเคยสงสัยไหม “นำเครื่องตรวจจับโลหะมาใช้ตรวจสอบสินค้าในกระบวนการผลิตแล้ว แต่ก็ยังพบโลหะปลอมปนไปกับสินค้าอีก” ??
“การเพิ่มประสิทธิภาพการคัดแยกสินค้าของเครื่องตรวจจับโลหะ”
ปัจจุบันนั้น เครื่องตรวจจับโลหะ ได้ถูกใช้งานกันอย่างแพร่หลายในอุตสาหกรรมอาหาร, อุตสาหกรรมยา เป็นต้น ซึ่งเครื่องตรวจจับโลหะ ที่ใช้งานกันนั้น เมื่อมีการตรวจพบโลหะ ก็จะมีวิธีการคัดแยกสินค้า ที่มีโลหะปลอมปน หลักๆอยู่ 2 ระบบ ที่นิยมใช้กันในปัจจุบัน ได้แก่
1.ระบบสายพานหยุดและมีไฟ หรือ เสียงร้องเตือน (Belt stop and Alarm) เมื่อเครื่องตรวจพบโลหะ เครื่องจะส่งสัญญาณให้สายพานลำเลียงหยุด และ มีไฟ และเสียงร้องเตือน ผู้ปฏิบัติงานก็จะเป็นผู้คัดแยกสินค้าที่ปนเปื้อนออกไป เหมาะกับกระบวนการผลิตแบบ Manual ที่ใช้พนักงานเป็นคนป้อนสินค้าเข้าเครื่อง แต่ก็มีข้อควรระวังในกรณีที่หากมีสินต้ามากกว่า 1 ชิ้นบนสายพาน ผู้ใช้งานอาจจะคัดแยกสินค้าผิดได้
2.ระบบคัดแยกอัตโนมัติ (Automatic Rejection) เมื่อเครื่องตรวจพบโลหะเครื่องจะส่งสัญญาณให้ชุดคัดแยก อัตโนมัติ คัดแยกสินค้าที่มีการปลอมปนโลหะ ออกจากกระบวนการผลิตทันที โดยที่กระบวนการผลิตไม่หยุดชะงัก เหมาะกับกระบวนการผลิตแบบอัตโนมัติ การผลิตสินค้าจะมีความต่อเนื่อง และสามารถคัดแยกสินค้าไม่ผิดพลาดข้อควรระวังของระบบนี้ ก็จะเป็นเรื่องการปรับตั้งค่าเวลาในการคัดแยกสินค้าให้แม่นยำ ให้กับสินค้าแต่ละขนาด
อย่างไรก็ตามต่อให้มีระบบการคัดแยกทั้ง 2 แบบ ที่กล่าวข้างต้นแล้ว ก็ยังพบปัญหาว่า ยังคงมีสินค้าที่ปนเปื้อนหลุดรอดออกไปยังผู้บริโภคอยู่เป็นประจำ ทั้งนี้เกิดจากระบบการคัดแยกที่ผิดพลาด จากผู้ใช้งานเองหรือความผิดพลาดของอุปกรณ์คัดแยกต่างๆ ดังนั้นเพื่อป้องกันความผิดพลาด ในการคัดแยกที่จะเกิดขึ้น เครื่องตรวจจับโลหะ ได้มีการพัฒนาโปรแกรมการยืนยันการคัดแยกสินค้า ( Reject confirmation unit ] เพื่อสร้างความมั่นใจให้เกิดขึ้นกับผู้ปฏิบัติงาน และยังรองรับระบบมาตรฐาน HACCP และ BRC อีกด้วย
![22](https://www.atech.co.th/wp-content/uploads/2022/08/22.png)
เครื่องตรวจจับโลหะ ต้องสามารถยืนยันการคัดแยกได้ ( Reject Confirmation ) ระบบนี้เป็นระบบที่ช่วยยืนยันได้ว่า สินค้าที่มีโลหะปลอมปนอยู่นั้น ได้ถูกคัดแยกออกไปจากสาย การผลิตจริงๆ หากเกิดความผิดพลาดของระบบคัดแยกอัตโนมัติ เครื่องตรวจจับโลหะจะสั่งงานให้สายพานลำเลียงหยุดการทำงาน และข้อ ความขึ้นเตือนที่หน้าจอ
กรณีที่ผู้ใช้งานจะนำสินค้าที่มีโลหะปลอมปนออกจากถังคัดแยก ผู้ใช้งานที่รู้รหัสเท่านั้นที่จะสามารถปลดล็อคถังคัดแยกผ่านโปรแกรม เพื่อเป็นการป้องกันสินค้าที่คัดแยกแล้ว ปนกับเข้าไปในสายการผลิตอีก หากถังคัดแยกมีสินค้ามากเกินไปโปรแกรมจะทำการแจ้งเตือนผู้ใช้งานให้มานำสินค้าออกจากถัง(Bin full)
จะเห็นว่าด้วยระบบข้างต้นที่กล่าวมา จะสามารถเพิ่มประสิทธิภาพ การคัดแยกของเครื่องตรวจจับโลหะ ให้เพิ่มขึ้นได้ อีกทั้งยังสามารถสร้างความมั่นใจให้กับผู้ที่ควบคุมระบบคุณภาพได้เป็นอย่างดี
![33](https://www.atech.co.th/wp-content/uploads/2022/08/33.png)
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