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Curtis

CURTIS INSTRUMENTS AG

Our Core Competencies

bcdf3d2a5ea6494ccaa2bdd98d9413b420eFKEIdAI4AZeko-0.pngWe have extraordinary know-how in the development of control systems for complex high-end wheelchairs for paraplegics and quadriplegics. Thanks to our many years of experience and continuous innovation we are the world leader in this technology.

Software Development

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Franz Leu

Team Leader, SW Development

Standards

  • IEC62304 (Medical device software - Software life cycle processes)
  • MISRA

Technologies

  • State-of-the-art programming languages C++ (Embedded), ANSI-C, C#
  • UML Documentation
  • CAN-based communications using CANopen
  • Infrared and Bluetooth Environmental control

Platforms

  • ARM Cortex-M1/M3/M4
  • Windows
  • Apple iOS
  • Android

2558c48d0a9eedc0bb2604fbb96c36c4_f70.jpgApplications

  • Motor control systems, traction and stability control systems
  • Control of complex seat logic
  • Generic processing logic for a variety of input devices
  • Graphical User Interface
  • System parameterization
  • Control of the environment by different communications channels (Bluetooth/IR)
  • Safety monitoring
  • Simulation environment for embedded software

Methods

  • Agile Development, daily Stand-Up Meetings
  • Application Life Cycle Management with full traceability by appropriate toolchain
  • Revision Control with fully integrated toolchain versioning
  • Continuous Integration with Nightly Builds

 

Hardware Development

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Michael Christ

Team Leader, HW Development

Power Electronics

  • 24V multi-channel motor controllers, up to 120A

Control Engineering

  • Drive and steering motor control
  • Seat adjustment with position detection
  • Simulation with Matlab & Simulink, Real Time Prototyping with Speedgoat

dc4105550d9358b39479f1aeb9ae9794_f66.jpgAnalog and Digital Circuit Technology

  • Sensors and interfaces for motor current, speed, steering position, tilt, acceleration and angular velocity
  • Pressure measurement for sip-and-puff control
  • Safety-critical Microcontroller systems with LCD and OLED
  • Joystick and other haptic sensors for control panels

Communications

  • CANbus-based modular system
  • Internal communications via SPI, I2C and RS232
  • Interface Module for special input devices
  • Self-learning infrared system for operation of radio/TV etc.
  • Bluetooth for connection with mobile devices, PC, etc.

Circuit board layout

  • Multi layer printed circuit boards
  • EMC and ESD compliant design
  • Layout in Altium Designer

 

Mechanical Design

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Thom Stucki

Team Leader, Mechanical Design

Industrial Design

  • Draft designs of new devices
  • Feasibility studies

Design of mass-produced parts

  • Die-cast aluminum parts
  • Injection-molded plastic parts
  • Double injection parts
  • Keypads, connectors, springs, electromechanical parts
  • SolidWorks

Equipment construction

  • Assembly fixtures
  • Test fixtures

def8fb03a59accb9d5f0b718c09291a5_f65.jpgProduction and procurement support

  • Close cooperation with our manufacturing plants in China, Puerto Rico and Bulgaria
  • Close cooperation with our suppliers in Asia, Europe and the USA

Prototype testing, device tests

  • Measurements
  • Testing
  • Release

Tools

  • CAD: SolidWorks
  • CadMould
  • Misc. measurement instruments such as optical measuring microscope

 

Quality Assurance

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Benno Burri

Team Leader, Quality Assurance

Standards

  • IEC62304 (Medical device software - Software life cycle processes)
  • ISO14971 (Application of risk management to medical products)
  • ISO7176 (Wheelchair)

23012b399a7a146b5d2941de3721316d_f63.jpgVerification & Validation

  • Verification of product requirements
  • Validation of system stability and safety
  • Compilance with regulatory standards and guidance

Automated Validation Test System

  • Programming language C#
  • Analog and digital I/Os, image evaluation, data analysis (CANbus)
  • Life Cycle Tester
  • Temperature and cycle testing

Application Life Cycle Management

  • Polarion® configuration and support
  • Documentation for regulatory purposes (FDA, TÜV etc.)
  • Release Management

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