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E8    China Tsinghua University
 
 
 
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The Robotics and Automation Laboratory is one of the earliest founded laboratories that focuses on robotics theory and technology in China. In the recent years, at the robots research field, based on advanced manufacturing subject, aiming at the astronatic technology (micro satellites), the bio-science (gene analysis medical treatment), entertainment and the needs of special intelligent robots applied in the high-tech field such as non-traditional machining and operation, the Automation and Robotics Laboratory has already started series of research.
 Current Projects  
Research Areas
The research areas include but not limited to the follows:
  • l Mecidical and Life Science Robot System
  • l Special Manipulation Robot System
  • l Humanoid Robots
  • l Special Mobile Robots
  • l Robotic System and Automation
 
Mecidical and Life Science Robot System
 
3D Ultrasound-based Robotic System for Hepatic Tumors
Introduction:
A needle insertion robotic system for ultrasound-guided hepatic microwave coagulation therapy is under developing. It is composed of a needle insertion robot, a surgical planning subsystem and a pose tracking device.

Mission :
  • Reconstruct the 3D tumor model using 2D ultrasound images
  • Guide the needle insertion to the center of tumors with robotic system

Content:

  • Image technology including reconstruction and registration algorithm
  • Error studies on diagnostic imaging, registration base on markers and robot mechanism Calibration methods for the whole system
 
High precision micro-operational robot theory and system
Introduction:

Inching robots are widely used in precision micro operational field (micron/nanometer in scale), with high precision and small volume, adapted in microelectronic and micromechanical assembling, precision medical operation, biological experiments operation, ultra precise machine processing, etc.

Content:
  • Multi-DOF parallel variant elastic robot system, kinematics and dynamics model and inching position control theory.
  • High precision piezo electric servo driver and 6-DOF flexible hinge inching micro operational robot system.
  • Positioning precision is lower than 0.1 micron, resolution is lower than 0.01 micron. The robot is composed by micro parallel elastic inching head, precision measurement and distributed nonlinear control system.
Biochip DNA distribution theory and system
Introduction:

High speed precision robot system is the critical device in biochip development. The robot holds micro dosage DNA fluid distributor or micro dosage fluid nozzle and move in a high speed loop, dripping the DNA probe in a area of less than 60 microns in diameter.

We have already developed the first 3-DOF high speed probe assembling robot system type I and type II. Type II system can store 96~300 DNA probe fluid containers, realizing automatic load and continuous processing.

Mission:
  • Resetting precision: less than 30 microns
  • Probe assembling speed: more than 200 point/minute
  • Assembling more than 50000 point probe array in 1 square cm biochip

Content:

  • 3-DOF precision manipulator
  • Computer controlled system
  • Graphical biochip assembling process monitoring
  • Special holder
 
Special Manipulation Robot System
 
THSRO Intelligent Painting Robot
THSRO Intelligent Painting Robot is an understudied project. The robot is designed for complex inner surface painting. It is consist of special designed Manipulator, Painting System, Safety Guaranteed System, Measurement System, Transportation System, Control System and other auxiliary equipments.

serial: TH-50
mechanism: Cartesian Type and Joint type
axle number: 14
action space: Abnormity space which length is up to 10m and diameter is less 4m
max load: 1.5kg
absolute positioning accuracy: +/- 3mm
repeat positioning accuracy: +/- 1.5mm
power: Max 9kw
 
TH900:
ECM (Electret condenser microphone) soldering robot
Introduction:

TH900 is designed to meet the special requirements for ECM-FPC soldering process. TH900 has successfully implemented a customized iron tip (Chinese Patent 200810106318.2), a position-force control algorithm, and an experiment-verified soldering procedure to generate high quality soldering joints with the average eligibility rate ≥95%.

Parameters:
  • SCARA robot with 5 DOF;
  • Soldering speed: 900 pieces per hour;

System structure:

  • PC(Linux 2.6.20)
  • PMAC
  • Teaching pendant
  • CAN bus communication;
Stacker Robot
 
TH-50 stacker robot was designed for palletizing packaging bag and box which weight is 50kg or less. The robot is ideal equipment for palletizing, which is advanced performance, easy operation, reliable usage etc.

serial: TH-50
mechanism: Multi-joints Manipulator
control method: Continue trajectory control
axle number: 4
operating mode: teaching and playback or off-line programming
end actuators: Splint prong sucker etc...
max load: 800kg
positioning accuracy: +/- 1mm
power: Three-Phase, 7kw

 
Humanoid Robots
 
THBIP-I and THBIP-II Humanoid Robots
Mission:
  • Stand-up biped walking
  • Active body balance
  • Coordinated arm and leg motion
  • A given artificial intelligence

Content:

  • Biped stand-up walking theory
  • Coordinated arm and leg motion theory
  • Perspected information processing and synthesis
  • Independent behavior generation principle
  • Robot structure design
  • Robot control and communication system
  • Simulation and experiments
Humanoid biped soccer robot technology
Introduction:

Soccer robot is a challenging high technology intensive project. It concerns various theory and technology such as robotics, electro mechanics, communication and computer technology, real time digital signal processing, image processing and recognition, knowledge engineering and expert system, decision, route planning, self-organization and learning and multi-intelligent unit coordination.
 

 
Bionic Biped Robot, THR-II
THR-II aims to imitate human locomotion on both structure and control. THR-II has two legs, with totally 10 freedoms. The patella like mechanism is designed to prevent knee from over rotating. The artificial pneumatic muscles are used to actuate sagittal rotation of hip, knee, and ankle joints, while toe joints on sagittal plane and ankle joints on frontal plane are kept passive. The control of THR-II is based on CPG (Central Pattern Generator), sensor-reflex, and self-stabilization. PC/104 CPU module is used as central controller. A/D, D/A, I/O card are used to acquire sensor data. Potentiometers are fixed on hip, knee, and ankle joints to measure angles on real time. FSR (Force Sensing Resistor) are fixed on feet to detect impact on ground. Accelerometer and gyroscope are fixed on shank to measure posture of robot. The height of THR-II is 0.8m, and the weight is 5.5kg.
THR–I Humanoid Robot
Function and Structure

This Robot has four joints. It can walk on the flat floor stably, and can translate between several walking gaits fluently. The aims are to realize running gaits which consist of single-support phase and flight phase, and stable translation between gaits such as walk, bounce and run.

application area

1.Served as platform of multi-DOFs and complicated dynamic system to research theories about stability criterion, passive walk, sensor feedback, gaits mode transition, large-step and dynamic running control ,etc..

2.Served as platform for teaching and experimentation of classes like robotics, mechanics and control.
 
Special Mobile Robots
 
Conduit inspection robot technology
Mission:

Velocity 1000m/h
Detection distance 1000m/time
Adaptive conduit diameter 140mm-160mm

Features:

  • The conduit robot adopts wheel carrier to realize high tractive force, high speed, easy steering, vertically walking and easy passing through bend tube of 90 degrees, adaptive to conduit diameter alteration.
  • Composed by 3 or more uniform walking units. Each unit is composed by motor, deceleration drive structure, support system and walking system
  • Deceleration system is composed by 1 worm couple, outputing high torque.
  • Support system adopts scissors structure. Walking unit is compressed to the internal wall of conduit and the robot is drive to move forward or backword by friction force.
  • Walking system of each unit includes 1 action wheel and 1 follower

Content:

  • The moving carrier of conduit robot
  • Design and experiment of conduit cleaning system
Wall-climbing detection and inspection robot
Introduction:

l A kind of special robot that can move along vertical metal walls.

l Adopted 2 tracks as motion mechanism

l Adsorpted to the wall by permanent-magnet

l Sense of sight, approach and attitude, a give intelligence

l Carring eddy inspection probe to accomplish nondestructive inspection on the oil tank

Content:

l On-wall motion planning of wall climbing robot

l Steering mechanics of track wall climbing robot

l Wall transition technology

l Eddy nondestructive inspection

l Motion control of wall climbing robot
 
Robotic System and Automation
 
The electronic design for the highly function integration
  • Flexible screen and touch screen
  • Flexible solar battery and battery
  • FPC and Nano-mechanical components
  • Some sensors
    • Blue-tooth
    • Temperature and humidity
    • Fingerprint identification sensor
    • Olfactory sensor
    • Radiant sensor
    • Ultraviolet sensor
    • Position sensors, pose sensors and acceleration sensor
    • GPS

       
 
Distributed Coordination Multi-robot Mobile System
Introduction:
  • Multi-machine cooperated mobile method is applied.
  • System unit is designed as reconstructable models, decreasing the cost of manufacturing and
  • utilization.
  • Active unit adopts single DOF structure, realizes the maximum extensive capacity of combined structure
  • and kinematic function, avoids the redundancy of structure and function, reduces the system structure
  • and control complexity.
  • Distributed control realizable.

Content:

  • Kinetic and structural recombination theory in non-structural environment
  • Coordinated control theory in combined system units
  • Communation protocol planning of system units and communication method realization
  • Synthetic process method of internal and external environment information
  • Distributed multi-robot motion planning
  • System unit structure design

Synthetic kinetic function, including system breaks up and pass narrow space through, discreet supported movement on non-structural environment or rough land form.

 
Intelligent Flexible Manufacturing System for Product
Research and Development
Introduction:

The intelligent flexible manufacturing system is an integrated computer control system in process industry. It makes the realization of integration and automation of production management and industrial control. This system has been used in the toothpaste trial-manufacture process for the R&D department of P&G Corp. Compared with the usual large-scale automated production lines, this system features with:
  • High degree of flexibility: Satisfy the requirements of small batch production for multiple recipes development.
  • High precision: Meet the strict requirements of the quantity and ratio of raw materials.
  • High degree of information and automation: Integration of production process, management and control.
DSP-FPGA Based Multi-Axis Motion Controller TH-300
 
Introduction:

As a general purpose motion controller, TH-300 is adaptive to various intelligent control systems, such as robotics, machine tools, production lines, etc. The core components of TH-300 are high-performance DSP and FPGA, which enable the realization of real-time calculation of control algorithms and I/O management.

Content:
There are two working modes of TH-300:
  • Autonomous control system: By comprising of the main controller board, I/O board, SRAM, and some other extension board, TH-300 can work as a standalone control system.
  • Distributed control system: TH-300 can communicate with a host computer via serial port or CAN field bus, which enable the easy establishment of distributed control system by using a host computer and multiple TH-300 controllers.
 
 
 

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