I. Flash Tester: Technical Overview and Core Advantages

The Flash Gauge is a rapid measurement instrument based on high-resolution lenses and intelligent image analysis algorithms. Its core feature is “one-touch photography with full-dimension results in seconds.”

• Working Principle： Place the workpiece within the measurement area. The instrument captures the entire contour image of the workpiece through a single or a few photographs. It then automatically identifies, matches, and calculates all preset dimensional features using advanced image processing algorithms.

• Differences from Traditional Imaging Systems：

  • Traditional Manual Imaging System: Requires operators to manually control the platform, aligning each feature individually for measurement. This approach is inefficient and highly dependent on personnel.

  • Flash Measurement System: Automated and intelligent, it eliminates human operational errors and achieves “what you see is what you measure.” Measurement speed increases by an order of magnitude.

Core Advantages:

• Extremely High Efficiency: Measuring a complex workpiece typically takes only a few seconds to tens of seconds.

• Minimal Operation: Low skill requirements for operators; precise measurements can be completed without specialized training.

• High Repeatability and Consistency: Fully executed by programs and algorithms, eliminating human interference for stable and reliable results.

• Data Informatization: Automatically generates statistical reports, trend charts, and CPK values, seamlessly integrating with quality management systems like MES/QMS.

II. Specific Application of Flash Tester in Mobile Phone Plastic Frame Inspection

The plastic mid-frame of mobile phones features complex structures and numerous dimensions. The flash tester enables comprehensive and rapid inspection of these components.

1. External Dimensions:

• Inspection Items: Overall Length, Overall Width, Diagonal Dimensions, R-Corner Radius.

• Technical Implementation: Through high-contrast backlight imaging, capture clear outer contours, automatically fit boundaries, and calculate macroscopic dimensions.

2. Internal structural features:

• Test Items:

  • Various Aperture Dimensions: Nominal size and positional accuracy of speaker apertures, microphone apertures, and wiring apertures.

  • Slot/Slot Dimensions: Length, width, and position of volume key slots and SIM card slots.

  • Cavity Dimensions: Contour dimensions of camera cavities and battery compartments.

• Technical Implementation: Utilizing contour lighting or surface illumination to clearly delineate the edges of internal features, enabling automatic recognition and measurement.

3. Flatness and Warpage Inspection:

• Inspection Items: Overall flatness of the middle frame, Flatness of specific mounting surfaces.

• Technical Implementation: This represents an advanced application of the flash scanner. By utilizing multi-focus imaging or micrometer-level depth-of-field scanning, point cloud data at varying heights across the mid-frame surface is captured. Subsequently, through plane fitting algorithms, the maximum deviation of the entire surface or designated areas relative to the reference plane is calculated.

4. Contour Comparison:

• Inspection Item: Compare the actual production frame contour with the design drawings (CAD model).

• Technical Implementation: Import the product's 2D CAD drawings into the software. During measurement, the system automatically aligns the captured actual contour with the CAD theoretical contour using coordinate system unification (best-fit alignment). Deviations at each position are then visually displayed as a color map, enabling easy identification of defects such as shrinkage and deformation.

III. Outstanding Performance of Flash Testers

• High Precision: Leveraging high-resolution lenses and sub-pixel edge extraction technology, the flash measurement instrument effortlessly achieves measurement accuracy of ±1~3μm, fully meeting the stringent tolerance requirements for plastic mid-frames.

• High Speed: Taking the POMEAS flash measurement instrument as an example, measuring a mobile phone mid-frame with over 100 dimensions takes only 20-30 seconds total (including loading/unloading time), whereas traditional methods may require over 10 minutes.

• Fully Automated: Simply press a button, and the instrument automatically completes the entire process: image capture, focusing, feature recognition, measurement, judgment, and report generation.