Group SD0624

From ECE Department Wiki

Contents 1 Bobcat Self-Service Machine 2 Group Members 3 Introduction 4 Requirements 5 Final Project Picture 6 System Flowchart 7 Hardware Schematic

Bobcat Self-Service Machine

Group Members

• Alex Mork

• Nick Weisbeck(haircut client)

&

• Lyle Richard(barber)

• Shaun Phipps

Introduction

Our senior design group will design a system that will automatically grease service points on a Bobcat skid steer loader. The system will also detect low engine oil at startup and will replenish engine oil from a backup reservoir. The system will communicate with Bobcat using CAN. Controller Area Network (CAN) is a multicast shared serial bus standard for connecting electronic control units (ECUs). The system may also implement the use of timers and relays to activate automatic servicing. We will create a system that can demonstrate the concept of a “self service machine” that with little modification can work in industry and be adapted to a Bobcat skid steer.

Requirements

Electrical

• Interface with Bobcat CAN to retrieve servicing interval information.
• Control operation using microcontroller.
• Design hardware to work with microcontroller.
• Use 12V system voltage common to automobile and construction industry.
• Write and implement microcode that will manage and monitor self service system.
• Use sensors and timers to detect points in need of service.
• Indicate system failure or malfunction to user.

Mechanical

• Service 2 grease zerk service points with 2 hour service intervals.
• Service 5 grease zerk service points with 5 hour service intervals.
• Service 5 grease zerk service points with 20 hour service intervals.
• Service 2 grease zerk service points with 30 hour service intervals.
• If engine oil is low at start up add until sensor detect oil is present.
• A 2 quart oil reservoir shall be utilized for oil additions.

Environmental

• Must endure environmental rigors of a construction atmosphere.
• Must continue to operate through dust, vibration, and abuse.

Final Project Picture

Below is the completed Self Service Machine project. It communicates with existing CAN bus used on a bobcat skid steer loader. It will automatically detect low engine oil before startup and will replenish from an external resevoir. It will also automatically lubricate point specific areas of the machine based on the individual service intervals. The controller bases which areas to lubricate by the current count of machine engine hours which it recieves electronically from the master BOB controller.

System Flowchart

Hardware Schematic