IEO's in-line advanced smartphone inspection system reserves a communication protocol for APP-based feature upgrades. It inspects indicators that normally require trained specialists - front and rear camera sharpness, screen dead lines and bright spots, sensors and gyroscopes, flash, screen sensitivity, audio volume and signal-to-noise ratio - lowering skill requirements, unifying inspection standards and saving labor costs.

With an in-line multi-threaded control design, up to 8 phones can be tested simultaneously, with one phone completed every 20-25 seconds on average. Equipment UPH (units per hour) is 150 PCS or more.

The PMADS automatic inspection system works with both Android and iOS phones. It focuses on the difficult steps that demand high operator skill - camera lens, screen and audio - replacing manual work with efficient, standardized testing at outstanding value for money.

Shenzhen IEO Technology is committed to eliminating the inconsistent scoring caused by varying operator skill in manual testing. Let's take a closer look together.

1) Proximity and ambient light sensors

2) Front and rear cameras, wide and tele lenses: MTF sharpness, brightness uniformity, color uniformity, white balance and flash

3) Screen white/red/black display, dead lines, specks, bright spots, dark spots, bright patches, stripes, light bleed, light leakage, liquid leakage and yellowing

4) Screen touch sensitivity and 3D Touch

5) Earpiece and speaker volume and frequency; top and bottom microphone volume and frequency

6) Genuine vs. non-genuine screen (whether it is an original part)

1. Lower manpower and environment setup requirements

The system automates camera, screen and audio inspection in a production line, reducing the manpower and test hardware that manual testing requires.

2. Replaces human visual judgment

Intelligent algorithms detect subtle defects in the lens, screen and audio that would otherwise need a trained human eye. Every inspection is archived and replayable, giving accurate and standardized results.

3. Automated control of the test process

Switching and control during testing are fully automated with no manual intervention, delivering an efficient and consistent inspection process.

IEO's PMADS smartphone inspection system connects to the APP over a socket protocol. The PMADS control console is designed with the following features:

The console drives multiple phones concurrently: sharpness analysis of the front and rear cameras, screen dead-line and bright-spot detection, inspection of the camera lens for dark spots and dead lines, evaluation of screen sensitivity, and measurement of microphone and speaker volume and signal-to-noise ratio.

1. For screen inspection PMADS first models the phone's screen contour to derive its curve function. Based on that function, the edge region and the central region are treated separately, applying different dead-line, bright-spot and dark-spot algorithms.

Inspection result:

2. MTF50 is calculated from the slanted edge of a captured grid to derive sharpness:

3. Analyze the camera lens for dark spots and dead lines

4. Screen swipe traces recorded by the APP are used to test touch sensitivity

Locating the 3D Touch button on the screen

5. Measure microphone frequency and volume

1.1 Structure