Vernier Motion Encoder System - Manual

Vernier Motion
Encoder System
(Order Code: VDS-EC)
The Vernier Motion Encoder System *
is a Vernier Dynamics System outfitted
for the precise study of dynamics cart motion without the use of ultrasonic motion
detectors. The encoder system consists of several parts:
 A track with an encoder strip along the length of the track
 A dynamics cart with an optical encoder and infrared (IR) transmitter
 A receiver, attached to the end of a track
The encoder strip consists of alternating black and white bars with a 4 mm period,
allowing the optical sensor to detect the passage of the bars as the cart moves. With
two sensors appropriately placed, a change in position with 1 mm resolution can be
determined, as well as the direction of travel. A narrow infrared beam transmits
motion data to a receiver.
No alignments or adjustments are necessary, as the receiver attaches firmly to the
track, and the cart rides in slots on the track. The IR beam is not disturbed by
reflections from nearby objects.
The system is designed for use in physics and physical science courses for motion
and energy experiments. An optional Optics Expansion Kit (order code: OEK)
converts the track to an optics bench.
Some typical experiments done with the system include
 Motion under zero acceleration
 Motion under constant acceleration with the ramp inclined
 Inelastic collisions using the included hook-and-pile tabs
 Elastic collisions using the included magnetic bumpers
Parts Included with the Vernier Motion Encoder System
 Motion Encoder Cart with magnetic and hook-and-pile end caps
 Motion Encoder Receiver
 Plunger Cart with magnetic and hook-and-pile end caps
 Mass – 500 g
 Combination 1.2 m dynamics track/optics bench with encoder strip
 Adjustable leveling feet
 Mounting hardware for Dual-Range Force Sensor and accelerometers
 Adjustable End Stop
 Motion Detector Bracket
* Patent Pending
2
 2 Photogate Brackets
 Rod Clamp
 Allen wrench 3/32 inch
Collect Data with the Vernier Motion Encoder System
This sensor can be used with the following interfaces to collect data:
 Vernier LabQuest ® as a standalone device or with a computer
 Vernier LabQuest ® Mini with a computer
 Vernier LabPro ® with a computer
WARNING: The Motion Encoder Receiver is not compatible with the Texas
Instruments TI-Nspire Lab Cradle. Connecting the Receiver to the Lab Cradle will
render the Cradle inoperative, requiring repair by Texas Instruments.
Essential steps for using the Vernier Motion Encoder System:
1. Attach the receiver to the end of the track, matching the encoder strip on the track
to the markings on the receiver.
2. Place the track on a level surface.
3. Insert two AAA batteries (not included) into the encoder cart.
4. Connect the receiver to an interface such as a LabQuest 2. If using a computer,
connect the interface to your computer, and launch Logger Pro.
5. Turn on the cart by pressing the power button. It will glow blue when the cart is
on.
6. Place the cart on the track, wheels in grooves, with the blue light facing the
receiver.
7. Begin data collection, and let the cart roll.
Data-Collection Software
This sensor can be used with an interface and the following data-collection software.
 Logger Pro 3 This computer program is used with LabQuest or LabPro.
Version 3.8.6.2 or newer is required.
 LabQuest App This program is used when LabQuest is used as a standalone
device. Versions 1.7.1 for the original LabQuest and 2.2.1 for the LabQuest 2,
or newer, are required.
NOTE: Vernier products are designed for educational use. Our products are not
designed nor are they recommended for any industrial, medical, or commercial
process such as life support, patient diagnosis, control of a manufacturing process, or
industrial testing of any kind.
Specifications
Measurement Range
1 m range
2 m range
1.2 m track
2.2 m track
Accuracy and Resolution 1 mm
Optimum data-collection rate 15–30 Hz