Modern smartphones often come with smart voice assistants like “Hey Siri” or “Hi Alexa”. These systems rely on two key acoustic components:
👉 Microphones (to receive voice)
👉 Speakers (to play sound)
Inside both components is a critical part: the coil.
The quality of this coil affects the overall sound performance. That’s why precise inspection is so important.
Why is Coil Inspection Needed?
Coils must be free from defects such as:
White spots, bubbles, carbon dots
Scratches, cracks, pinholes
Height differences or irregular spacing
Traditional inspection is done manually, using tools like calipers.
However, this method is:Slow
Inconsistent
Not cost-effective, especially with rising labor costs
🚀 The Better Solution: 3D Line Confocal Sensor
We offer an automated inspection solution using the
📌 HPS-LCF1000 3D Line Confocal Sensor
📌 HPS-NB3200 Vision Controller
This setup provides:
High-precision 3D imaging
Non-contact, fast scanning
Repeatable results within 1 μm precision
🔍 Application Setup
The coil is made of materials like gold, silver, copper – all highly reflective.
The sensor captures the height of 4 edge points on the coil.
It measures the relative height from the top of the coil to the bottom surface.
Multiple scans in both X and Y directions ensure consistent results.
📊 Example scan result:
The surface shape and height are clearly shown in the 3D image with high detail.
