Project # 04039

Team Members:Maham Suleman, EE

Anne Johnson, ME

Joe Farnsworth, EE

Josh Brown, ME

Jerry Money, EE

Sanh Ha, ME

 Jeffrey Miller, EE

Faculty Advisors: Faulty Coordinator: Dr. Sahin, EE Prof. George Slack

Dr. Kochersberger, ME

Project Sponsor

TRANSCATLocated in Rochester, NY

– Industry leader in calibration services Instrumentation

Transcat Contact– Howard Zion

– Philip Mistretta

– Rainer Stellrecht

– Robert Maddamma

Current Workbench Setup

Project Background

Problem DescriptionHigh volume unitUndergoes preliminary testing

process– Semi-automated through CalTrak® – Technician still required

Project Mission

Mission StatementInvestigate viable methodologies and approaches to automate the“as received data” calibration process for the Fluke 80Series multimeters.

Project Description Build a working prototype to

– Automate the reading process– Toggle the push buttons– Switch between test leads– Rotate the VOM rotary switch

Final Assembly

Driving Components– Camera placement

– Solenoid actuator stroke length

12” x 12”x ½” 6061 Aluminum base plate

¼” Plexiglas case– Encloses components

– Multimeter placement and constraint

Rotate the VOM rotary switch

Hurst Series ABS Geared Stepping Motor

Rated Torque 132.6 oz-in Step angle 0.1 Custom made rotary dial

fixture

Polypropylene plastic construction– Easily machine-able– Non-conductive

3 banana plugs– mA, COM, and VΩ

Banana Plug Assembly

Independent Amp Terminal– Mini polypropylene block

– Utilizes a sliding rail bearing

– Provides insertion / extraction

Finished Banana Plug Assembly

Banana Plug Assembly

Solenoid Fixture

3 solenoids used to depress multimeter buttons, allowing for automation of calibration and mode selection.

70155K12 push style continuous duty linear solenoids from McMaster-Carr selected for application.

Design of Bracket

Design had to account for ideal striking distance of solenoids themselves, button arrangement, size constraints.

Mounting had to accommodate clear LOS for camera, while remaining adaptable to location of stepper motor assembly.

System Control

PIC18F8720 Microcontroller

-Dual UARTS

-52 I/O’s (14 used)

Control Programming

-CalTrak Command Strings

-“conf,XXXX

-“flt,ave,#times,%tol”

-“read,value”

Camera Captures the image On-Board processing

Image Analysis Breaks image into pixel arrays Calculates average color

Display Analysis

Driver Circuits

Stepper Motor Driver Circuit

-UCN5804 Chip

-4 I/O’s used per chip

-1.25Amp continuous output

Linear Actuator / Relay Driver

-N-Channel MOSFET

-1 I/O used per driver

Finished Assembly

Questions?