Rhopoint TAMS™ (Total Appearance Measurement System), an innovative appearance meter, with comprehensive parameters that mimic human perception of surface appearance quality.

Rhopoint TAMS™

In the automotive industry, color is not the only important parameter to describe a high-quality paint finish. Brilliance (gloss) and smoothness, often referred to as DOI (Distinctness of Image), are equally important. To achieve maximum visual impact, overall surface finish must display both high quality and harmony.

Rhopoint TAMS™, inspired by a four-year collaboration between Rhopoint, Volkswagen AG and AUDI AG, is a new way of quantifying appearance quality. Equipped with new parameters, this innovative new technology mimic human perception of surface appearance quality, providing easy and fast communication of visual appearance information.

PERCEPTION

Contrast

Related to the color of the surface where white and metallic surfaces exhibit low contrast while black surface has high contrast. This parameter quantifies the visual impact of both haze effects and orange peel which are visible on high contrast colors.

Sharpness

Sharpness measures the accuracy of the reflected images. Sharpness defines how well a surface reflects fine details at close distances (<0.5m). At showroom viewing distance (1.5m), it quantifies clarity and haze.

Waviness

Waviness of a surface is vital in establishing appearance quality as it measures the visible impact of surfaces waves to observer at showroom distance (1.5m).

Dimension

Dimension indicates the dominant structure size, an important parameter in determining the harmony between adjacent parts and panels, viewed at showroom distance (1.5m). Values are usually between 1–6mm.

DEFINES

Quality

Calculated using Sharpness and Waviness parameters, the Quality index rates the total appearance quality of a surface. Smooth finish with perfect image forming characteristics is indicated by 100%

Harmony

Calculated using Waviness and Dimension parameters, the Harmony index determines the acceptability of adjacent car parts. A >1.0 value would indicate that parts are dissimilar when viewed together and will reduce the overall visual quality.

Rhopoint TAMS™ VISION

By changing its imaging system focus from surface to reflected image, Rhopoint TAMS™ is able to mimic human evaluation of reflective surface.

APPLICATION OPTIONS

Rhopoint TAMS™ has the ability to capture surface data ranging from mid gloss to high gloss, offering the possibility of quantifying all surfaces such as E-Coat, filler, base coat and top coat aluminum and steel, throughout the automotive manufacturing process.

Rhopoint TAMS™

  • Dual focus camera to fully captures all surface appearance data
  • Powerful processor for fast operation
  • Easy-to-navigate touch-screen menu
  • Push and start pressure sensitive auto-measurement system
  • Rechargeable and removable lithium polymer batteries
  • RFID available for enhanced process integration

Rhopoint TAMS™

Specifications Rhopoint TAMS™
SHARPNESS
Units S (%)
Minimum (No visible reflection) 0
Maximum (Perfect mirror) 100
Resolution 0.1
Repeatability 0.1 (SD)
Reproducibility 0.5 (SD)
Measurement Technique Optical Transfer Function
CONTRAST
Units C (%)
Minimum (Perfect Diffuse White) 0
Maximum (Perfect Black) 100
Resolution 0.1
Repeatability 0.1 (SD)
Reproducibility 0.3 (SD)
Measurement Technique Optical Transfer Function
WAVINESS
Units
W (W units)
Minimum
0
Typical Maximum
3
Resolution
0.1
Repeatability
0.2 (SD)
Reproducibility
1 (SD)
Measurement Technique
Reflected Image Line Deformation Analysis
Correlation
AUDI AG MDS Perception analysis
DIMENSION
Units
D (mm)
Minimum
0.5
Maximum (typical)
8
Resolution
0.1
Repeatability
0.1 (SD)
Reproducibility
0.4 (SD)
Measurement Technique
Phase Measurement Deflectometry
Correlation AUDI AG MDS Perception analysis
QUALITY
Units
Q (%)
Minimum
0
Maximum (typical)
100
Resolution
0.1
Repeatability
0.2 (SD)
Reproducibility
0.8 (SD)
Algorithm
Calculated using Sharpness & Waviness
Correlation
Volkswagen AG Quality Perception Studies
HARMONY
Units
H (H units)
Minimum
0
Maximum (typical)
8.9
Resolution
0.1
Repeatability
0.1 (SD)
Reproducibility
0.2 (SD)
Algorithm
Calculated using Waviness and Dimension
Correlation
AUDI AG MDS Perception analysis
INSTRUMENT SPECIFICATION
Menu Interface
5 Capacitive Sense buttons
Measurement Operation
Tactile button, capacitive sensor, push&start auto measurement system
Measurement Time
4 Second Image Capture
4 Second Processing
Colour Screen
Full colour IPS screen
Power
Removeable rechargeable
lithium polymer batteries
Operation
Up to 5 hours/charge
Memory
>100,000 readings
8GB internal
8GB SD card
Data Transfer
SD Card, USB, Ethernet
Optical System
Variable Focus Machine Vision
Spatial Resolution (surface)
34μm/pixel
Field of View (surface)
25x16mm
Processor Specification
ARM A8 Dual core + Digital
Signal Processor
Production Integration
RFID TAG Reader (optional)
Dimensions / Weight
172x136x56mm / 950g
Additional Sensors
Accelerometer, Orientation,
4 x Pressure (measurement)
Construction
Aluminium instrument case

 

 

Rhopoint TAMS™

Catalog Download: Download PDF (1.98MB)