Cruise control complement
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Cruise Control Complement. Team: B-Braker Alan C. Hedding Nate S. Drury. Background. 226 million vehicles registered in the USA. About 40% have cruise control. Invented in 1945, basic idea is still the same. Currently, only throttle is controlled. Problems with Cruise Control.

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Cruise Control Complement

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Cruise control complement

Cruise Control Complement

Team: B-Braker

Alan C. Hedding

Nate S. Drury


Background

Background

  • 226 million vehicles registered in the USA.

  • About 40% have cruise control.

  • Invented in 1945, basic idea is still the same.

  • Currently, only throttle is controlled.


Problems with cruise control

Problems with Cruise Control

  • Steep downhill slopes

  • Other traffic

  • “Highway Hypnosis”

  • Drivers falling asleep


Complement to cruise control

Complement to Cruise Control

Want prototype to:

  • Sense objects in front of vehicle and apply brakes.

  • Apply brakes when vehicle exceeds requested speed.

  • Sound alarm and gently apply brakes if driver removes hands from wheel.

  • Control braking intervals according to road grade to prevent sliding on downhill slopes.


Major objectives

Major Objectives

Build a braking system that:

  • will enhance the safety of vehicles.

  • is adaptable to all vehicles.

  • uses currently marketed technology.

  • is economical.

    and

  • Develop a scaled-down and simplified prototype to demonstrate functionality.


Design top level

Design Top Level

3

2

1

4


Speed sensor

Cherry Electrical MP1013

Low price - $5.04 /unit

Bullet shape easier to use

Honeywell SR 16/17 Series

Low price - $6.00 /unit

Vane design requires < 3mm ferrous disk

Speed Sensor


Sonar distance sensor

Maxbotix MaxSonar-EZ1

Detects objects at distances up to 6.45 m to within 1 inch.

RS232 output

Inexpensive - $24.95

Sonar Distance Sensor


Tilt sensor

Spectron Spectrotilt 4-20mA Electronic Inclinometer

Analog output up to 20mA

±60°

Rieker H4 Series Inclinometer

8 bit RS232 output

±30°, ±45°, ±60° models

Tilt Sensor


Digital potentiometer

Maxim MAX5402

$0.95 /unit

3-wire interface

Maxim DS1805

$1.10 /unit

2-wire interface

Digital Potentiometer


Cost analysis

Cost Analysis

  • Mechanical Requirements:

    Brake$400.00 *donated

    Brake Controller$400.00 *donated

    24 Volt power supply $45.00

    Chassis $90.00

  • Electrical Requirements:

    Sonar sensor $25.00

    Speed sensor $6.00

    Capacitance sensor $ -------

    Tilt sensor $ -------

    Microprocessor $4.00 *donated


Project plan

Project Plan


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