Human Electric Trike Thesis

Design of an electrically assisted human powered trike

Garmin Edge 205 GPS

Posted by Bob Dold on Friday, September 29, 2006 2:54 PM

While looking for components to set up a data acquistion system I came across this $200 bike GPS with logging software. I think this may do the job in logging speed and grade better than trying to fabricate my own using and inclinometer and data acquisition board. To track current I may still need a current logging system that I can sync to the Edge results. Cheapest inclinometer I could find was $150 + $109 USB data board which still requires software, a way of measuring speed, and carrying around a laptop on the trike:

Sample plot from GPS software:

Take your ride to the next level with the Garmin Edge 205 – Garmin’s GPS-enabled personal trainer and cycle computer. Perfect for touring and the trails, the lightweight Edge is the ultimate fitness partner. With the easy-to-use Edge 205 on your bike, you always know where you’re going and how far you’ve gone. For advanced cyclists, the Edge 305 is available with either a heart rate monitor or a wireless speed/pedaling cadence sensor to help you achieve your personal best.

The Edge 205 measures speed, distance, time, calories burned, altitude, climb and descent, plus much more. 205 features include:

  • Easy-to-install – no calibration required. Just snap it in the included bike mount and go
  • High-sensitivity GPS receiver – knows your position even in tree cover and canyons, making it extremely reliable for navigation
  • Customizable cycle computer – shows up to eight different data fields for continuous feedback
  • Virtual Partner – lets you “race” a virtual competitor, making training fun
  • Courses – lets you “race” against a recorded course to try to match previously set speeds at every point along the way
  • Auto Pause – pauses the training timer when you slow down below a specified speed and resumes when you speed up again so you can focus on your ride
  • Training Center software – gives you the ability to create workouts, manage and download courses, and create a detailed post-ride analysis that charts your performance

With its waterproof, sleek design, the Edge is the perfect companion on any bike, and attaches to either the stem or handlebars. Its rugged case frames an easy-to-read, large, backlit display that can show up to eight different data fields along with altitude and a map view.

Included Training Center software gives you the ability to overlay your ride data onto a course map. It offers interactive analysis tools that measure your speed, distance, climb, and descent against varying terrain, elevation and more. Create and schedule custom workouts or use workout templates and download to the Edge.

Edge 205 Features:

  • GPS: High-sensitivity SiRFstarIII receiver
  • Antenna: Built-in patch GPS antenna
  • Weight: 88 g, 3.1 oz.
  • Display: 1.17″W x 1.44″H, 128 x 160 pixels, 4-level grayscale LCD with backlighting
  • Unit dimensions: 1.75″W x 3.7″H x .9″D (44 x 94 x 23 mm)
  • Waterproof: IEC 60529 IPX7 standards (submersible in one meter of water for up to 30 mins.)
  • Battery: Up to 12 hours (typical use); rechargeable internal lithium ion
  • Track log: 13,000 track points

Package Includes:

  • Edge 205
  • Bike mount
  • Training Center CD
  • A/C charger
  • USB PC interface cable
  • Quick reference guide
  • Owner’s manual

Specifications

Features

  • Training data: Speed, distance, cadence (305 only), heart rate (305 only), lap by position, elevation, average and max speed, calories burned, climb and descent
  • History: Automatically records up to 1000 laps. Download to your PC using included Training Center software.
  • AutoPause: Automatically pauses the training timer when you slow down below a specified speed; timer resumes when you speed up again
  • AutoLap: Automatically triggers a lap every time you pass a specified location or travel a preset distance
  • Courses: Race against a recorded course and previous raced speeds at every point along the way. Combine Courses and Virtual Partner features and race an opponent that varies speed while climbing hills and navigating turns.
  • Virtual Partner: Race against a virtual competitor. Depicts a digital cyclist (desired speed) in relation to your real-time speed and shows how far ahead or behind you are.
  • Alerts: Speed, time, distance, heart rate (305 only), cadence (305 only)
  • Calories: Calculates calories burned based on user profile, performance data and altitude changes
  • Training Center: PC-based software (included) overlays ride data on a map and graphs speed, pace, heart rate, cadence and elevation. Create and schedule custom workouts or use workout templates and download to the Edge.

Navigation features

  • Receiver: SiRFStarIII high sensitivity receiver
  • Mark location: Mark and save up to 100 locations
  • Find location: Look up and navigate to stored locations
  • Back to start: Navigate back to starting location
  • Track log: 13,000 track points

Physical

  • Size: 1.75″W x 3.7″H x .9″D (44 x 94 x 23 mm)
  • Display: 1.17″W x 1.44″H (29.65 x 36.69 mm), 128 x 160 pixels, 4-level grayscale LCD with backlighting
  • Weight: 88 g
  • Waterproof: Waterproof to IEC 60529 IPX7 standards. All components are submersible in 1m of water for 30 minutes
  • Battery: 800 mAh rechargeable lithium-ion battery; 12 hours typical use
  • Antenna: Internal patch
  • Mount: 2-piece mount with zip ties; mounts on stem or handlebars
  • PC Interface: USB

Sensors

  • Heart rate: Robust wireless transmission; sends heart rate data to Edge via chest strap
  • Speed/cadence: Self-calibrating wireless sensor mounts to bike’s rear chain stay. Wheel magnet mounts to rear wheel for speed; cadence magnet attaches to crank arm.

Edge series comparison guide

Here’s how the units are different:

  • Edge 205 (this page):
  • Altitude: GPS based
  • Elevation profile: yes
  • Cadence: no
  • Heart rate: no
  • Edge 305HR:
  • Altitude: barometric altimeter
  • Elevation profile: yes
  • Cadence: yes with purchase of speed/cadence kit
  • Heart rate: yes
  • Edge 305CAD:
  • Altitude: barometric altimeter
  • Elevation profile: yes
  • Cadence: yes
  • Heart rate: yes with purchase of heart rate monitor kit

Product Shots:

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