ACDC A Helping hand Group a

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Presentation transcript:

ACDC A Helping hand Group a Akash Jinandra - EE/CPE Carlos Cuesta - EE/CPE Devin Defond - EE Chang Ching Wu - EE

Motivation Tele-Robotic Arm That is control by an Exo-skeleton Robots can go into hazardous conditions that humans cannot. Fires, Water, Space, Minefield Use of robots overtime allows for automation Through human control robots can learn to do the job better

Goals and Objectives Mission is to change Hewlett Packard Inc. LaserJet printer cartridge To develop a new control system to control HP’s in house robotic arm wireless via an exoskeleton To fit exoskeleton with sensors that can effectively, accurately, and efficiently map user’s movements onto robotic arm

Arm The arm has capability for 5 DOF (project focus only on 4 DOF) Shoulder (rotation on the y-axis in relation to stand) Elbow (rotation on the parallel axis to the Shoulder) Forearm (rotation on the perpendicular axis to the rotation plane of Elbow) Wrist (rotation on the perpendicular axis to the rotation plane of Forearm) Each degree of freedom is achieved through usage of 24V DC motor with reduction gear The position of each degree of freedom is tracked through usage of integrated rotary encoder mounted on the corresponding motor

Hand The manipulator of the arm is a 3D printed hand individual movement capability for the fingers and thumb Each finger is manipulated with a micro metal gear servo and metal braided wire The thumb is manipulated with a standard servo and metal braided wire

Specifications Communications Exoskeleton Sensors Power Shall have an operating range of 2.4 – 2.5 GHz. Shall have an operating distance of at least 30 meters. Shall transmit data at 2 megabits per second. Exoskeleton Sensors Shall have 5 potentiometer sensors, 1 per finger. Shall have 1 encoder for the elbow and 1 for the shoulder. Each potentiometer will rotate up to an angle of 180 degrees based on the finger input. Each encoder will track 4000 lines per revolution The Shoulder joint shall capture 90 degrees of rotation The Elbow joint shall capture 150 degrees of rotation Power The exoskeleton shall not consume more than 15 watts of power. The arm control system shall not consume more than 100 watts of power.

Overall Block Diagram

Sensors

Sensors – Elbow, Shoulder AMT102 Encoder Manufacturer CUI INC Power Supply 3.6 – 5.5 V Operating Current 6mA Dimensions 43.88 x 28.77 x 9mm Count 4000 lines/rev Price $0.55 per Purpose: The use of these encoders is to get the most accurate information possible from the elbow and the shoulder.

Sensors – Forearm Gyroscope: MPU6050 Module Manufacturer InvenSense Inc Power Supply 2.375 – 3.46V Operating Current 3.6mA Serial Interface I2C Dimensions 4.0 x 4.0 x 0.9mm Price $4.75 Purpose: The need for the gyroscope is to be able to record all movement on the forearm accurately.

Sensors – Fingers Uxcell Rotary Linear Taper Potentiometer Manufacturer Uxcell Power Supply 3 – 5 V Operating Current 40µA Shaft Dimensions 16 x 7.3mm Knob Dimensions 14 x 17mm Price $0.55 per Purpose: To record all movement in the user’s fingers.

Processing

Atmel Atmega16U2 Manufacturer Atmel Operating Voltage 2.37 – 5.5V Package TQFP32 Dimensions 9 x 9 x 1.2mm Price $4.35 Purpose: USB-to-Serial programming chip

Atmel Atmega328P Manufacturer Atmel Operating Voltage 1.8 – 5.5V Package TQFP32 Dimensions 9 x 9 x 1.2mm Price $3.81 Purpose: Main MCU and processing MCU for Rotary Encoder

PCA9685 Manufacturer NXP Semiconductors Operating Voltage 2.3 – 5.5V Package 28-TSSOP Dimensions 9.8 x 6.6 x 1.1mm Price $2.43 Purpose: Generating PWM to control Servos in the manipulator module

Processing PCB Exo Schematic

Processing PCB Exo Schematic

Processing PCB Exo Schematic

Processing PCB Exo Schematic

Processing PCB Arm Schematic

Processing PCB Arm Schematic

Processing PCB Arm Schematic

Processing PCB Arm Schematic

Processing PCB Arm Schematic

Processing PCB Arm Schematic

Processing PCB Arm Schematic

Communications

Communication Module Bluetooth HC-05 Categories Items Values Wireless Parameters Bluetooth Version V2.0 Frequency Range 2.4-2.5 GHz Hardware Parameters Operating Voltage 1.8 - 3.6V Average Current 25 mA Package Size 28 x 15 x 2.35mm Security Encryption 128 bit Manufacturer HC Electronics Price $4.98 Purpose: The need for the Bluetooth module is to allow for that data gathered from the exoskeleton to be transmitted wirelessly to the mechanical arm.

Power

Power Supply Manufacturer Meanwell Operating Voltage 24V Output Current <63A Dimensions 278 x 127 x 83.5mm Price Provided by HP Purpose: Used to power both the exoskeleton and arm control systems.

Voltage Regulator – 5V Output TPS 54302 (will be using two of them) Step down DC-DC switching converter Manufacturer Texas Instruments Operating Voltage 4.5-28V (24V nominal) Output Current 1A Package SOT-23 (6) Dimensions 1.60 x 2.9mm Operating Efficiency 93% Price $0.60 each Purpose: Used to regulate power from the main power supply to the MCUs, some sensors, and feed into the 3.3V regulators.

5V Voltage Regulator Schematic

Voltage Regulator – 6V Output TPS 54560 Step down DC-DC switching converter Manufacturer Texas Instruments Operating Voltage 4.5-60V (24V nominal) Output Current 5A Package HSOP (8) Dimensions 4.89 x 3.9mm Operating Efficiency 88% Price $2.30 each Purpose: Used to regulate power from the main power supply to the servo controller and each of the manipulator’s finger servos.

6V Voltage Regulator Schematic

Voltage Regulator – 3.3V Output TPS 562208 Step down DC-DC switching converter Manufacturer Texas Instruments Operating Voltage 4.5-17V (5V nominal) Output Current <0.5A Package SOT (6) Dimensions 1.60 x 2.90mm Operating Efficiency 90% Price $0.30 each Purpose: Used to regulate power from the 5V regulator to the Bluetooth modules.

3.3V Voltage Regulator Schematic

Exoskeleton Software

Arm Software

Administrative Content

Work Distribution Name Power Communications Software Processing Sensors Akash Jinandra - P S Carlos Cuesta Devin Defond Chang Ching Wu

Budget ** - actual spending price of project. Item # Approximate Price Overall Price Exoskeleton 1 $0 Mechanical Arm $20,000 Robotic Hand $200 Meanwell RSP 1500-24 $255.90 Exoskeleton PCB $20 Arm Controller PCB Exoskeleton Power PCB Arm Power PCB Atmega 328P 8 $3 $24 Atmega 16U2 2 $5 $10 Item # Approximate Price Overall Price TPS54302 2 $0.60 $1.20 TPS54560 1 $2.30 PUT 3.3V Regulator $0.3 Bluetooth HC-05 $4.98 $9.96 MPU6050 $4.75 Potentiometers 5 $0.55 $2.75 Encoders $33 $66 Resistor Pack $5 Capacitor Pack $10 LED Pack Zip ties $12.50 Wires Pack   Total 178.06** $20,700 ** - actual spending price of project.

Finance Received sponsorship from Hewlett Packard Inc. Robotic Arm Robotic Hand 3D printed parts Financial Reimbursement Engineering Mentorship

Progress

Issues Construction of Exoskeleton and robotic arm Mounting potentiometers and encoders on exoskeleton Porting code from Python to C

Questions?