Test & measurement safety and equipment uptime. T By making a manufacturing plant or process
smarter, customer expectations are also met with greater swiftness. This could include the creation of more tailored, bespoke products to fit specific needs, which would otherwise be inefficient or unprofitable to manufacture. In highly competitive sectors, having a smarter, more agile mindset could be the make-or-break difference between staying ahead or falling behind the curve. But when it comes to executing smart methodologies at the production level, what technologies are available?
DETECTING DISTANCE Position sensing is a crucial element of many smarter manufacturing processes, particularly with enabling factory automation. Tasks like pick-and-place or product assembly require the equipment to very accurately know its position in order to move precisely - information that can be obtained using position sensors. Depending on the type, these sensors may determine an object’s position either directly by finding its absolute location, or indirectly by measuring its relative displacement.
One common example is the inductive position sensor. Relying on principles of electromagnetic induction, these position sensors allow for non-contact detection of metallic objects. Conductive targets cause disturbances in the magnetic field, which are detected by the sensing element. Because only metallic objects will affect the magnetic field, inductive position sensing cannot be used to detect non-metals like plastic. But the upside of this is that the sensor is less likely to be affected by dust or dirt build-up because these will not affect the magnetic field. This makes them ideal for operation within dirtier industrial environments.
Another type is the optical position encoder. These typically consist of an LED and photodetector, with either an optical disc or scale depending on whether the encoder is measuring linear or rotary displacement. Optical encoders can perform to high resolutions, making them ideal for applications where high precision matters, such as a CNC machine. When photons of light are captured by the photodetector, a weak electrical signal is generated. This must be amplified using a signal-conditioning circuit before being digitised with an analogue-to-digital converter (ADC). It can then be received by a CPU or microcontroller, which is able to calculate object position based on the signal. The processing unit is capable of recognising events such as reference marks being passed and can immediately take remedial action within a closed-loop system.
76 he concept of smart
manufacturing has been around for some time. Essentially, its aim is to make processes more efficient and adaptable to changing market needs. This is all achieved while maintaining high production quality, worker
MAKING MANUFACTURING SMARTER WITH ASICS
Ongoing supply chain issues, skill gaps and ever- changing customer demands mean that now - more than ever - manufacturers are increasingly adopting ‘smart’ manufacturing mindsets to keep up. In this article, Richard Mount, director of Sales at ASIC design and supply company Swindon Silicon Systems explores the role of position sensors within smart manufacturing, and how ASICs can drive the technology further forwards.
September 2023 Instrumentation Monthly
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