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Introduction

DotX develops complete mechatronic systems. We have developed:

  • Camera Measurement Systems for steel coil inspection, in cooperation with Tebulo
  • testbeds for sensors
  • 5 axis 3D printer in cooperation with ABID

 

Vision system

The Camera Measurement System (CMS) is a high-resolution vision system built in coorperation with Tebulo (www.tebulo.com). CMS can accurately measure the 3D coordinates of both small and large objects.

Functional description

The CMS system uses a laser (number 2) to project a line (3) on an object (here: the tennis ball). It then makes a photo with its camera (1). Camera Measurement System

The CMS software then detects the laser light projection points and computes the exact coordinates of these points. Subsequently, this information is processed further into relevant data. For instance, in case of a tennis ball, CMS can measure its diameter.

Applications

Applications of the CMS system include :

  • the measurement of a steel coil’s centre of gravity location
  • determination of the amount of loose wraps on steel coils
  • telescoping (sizes)
  • strip thickness
  • strip profile

Specifications

  • Accuracy: +/- 0.5 mm
  • Measurement distances from CMS to object: 0.01 – 5.00 m
  • Software: coded in C++ Communication with external hardware: Ethernet and Profibus
Testbed for sensors

DotX designed and produced a testbed for a wind turbine manufacturer to analyse the low-frequent behaviour of acceleration and rotational speed sensors.
An accurate stepper motor (number 1, in photo below) drives a belt. The belt is connected to a mounting frame (number 2) for the accelerometer. In addition, the belt drives a rotating shaft (number 3). This shaft can be connected to a rotor speed sensor. 


testbed

 


Watch the movie:

 

 

 


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5D Printer

DotX and ABID (Alexander Bannink Industrial Design) have developied a novel 3d printer. This printer can print in any direction. This allows us to print with continous carbon fibre, kevlar, etcetera. As a result, we can print extremely strong objects. The 3D designer is provided with software tools to indicate the direction of the fibres. Subsequently, the slicer computes extruder movements so that the fibre is laid in that direction. In the photo below, we printed an object on a (white) 3D printed base. We then started to print on that base with water soluble filament. After that, the next layers were regular plastic. After completion the whole thing (base and print on base) was put in water to dissolve the water soluble layers. The outer object (dark colored) was the desired end result.  

Hunting Simulator

Stichting Leeuw asked DotX to develop an optimised version of their hunting-simulator. This simulator is a cable driven manipulator that is controlled by an operator. The operator 'teases' prey animals to hunt the manipulator (with meat). DotX has not only developed new optimized control software 'on paper', but also in the form of a game. One of the improvements is the application of 'haptic feedback'. That means, in this case, that the joystick pushes back when the manipulator approaches an obstacel. BIJZONDRHEDEN The tension forces in the cables are generated by a control algorithm consisting of two parts. The first part calculates the desired tension forces in three perpendicular directions using 3 PID controllers (1 for each direction). These three forces are then processed through a tension distribution algorithm in closed-form as described in [1]. The haptic assistence consists of a push-back force field around fixd objects (like walls and stones in the area) that is scaled on the basis of time to collision, in the direction of the normal vector that is perpendicular to the colliding surface.

[1] T. Lam et al, "Haptic interface in UAV tele-operation using force-stifness feedback", 2009, IEEE.

 

 
 
 
Brochure
Measuring and inspecting steel coils with camera system