Vernier Dynamics Cart and Track
System with
Motion Encoder
(Order Code DTS-EC)
The Dynamics Cart and Track System
with Motion Encoder is outfitted for the
precise study of dynamics cart motion without the use of ultrasonic motion detectors.
Instead of a traditional Motion Detector (order code MD-BTD), the system makes
use of a novel Motion Encoder System. The encoder 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 on the underside of the cart, a change in position
with 1 mm resolution can be determined, as well as the direction of travel of the cart.
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. A 2.2 m track is also available.
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 Dynamics Cart and Track System
with Motion Encoder
Motion Encoder Cart with 2 magnetic and 2 plain collision tabs
Motion Encoder Receiver
Plunger Cart with 2 magnetic and 4 plain collision tabs
Cart Masses (4) – 125 g
Combination 1.2 m Dynamics Track/Optics Bench with encoder strip
Adjustable Leveling Feet
2
Mounting hardware for Dual-Range Force Sensor and Low-g Accelerometer
(2 large bolts and 4 small bolts)
Adjustable End Stop
Motion Detector Bracket
Motion Detector Reflector Flag with 2 magnetic collision tabs
2 Photogate Brackets
Rod Clamp
Allen wrench 3/32 inch
Ultra Pulley
Pulley Bracket
Compatible Software and Interfaces
See www.vernier.com/dts-ec for a list of interfaces and software compatible with the
Vernier Dynamics Cart and Track System with Motion Encoder.
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.
Collect Data with the Vernier Dynamics Cart and Track System
with Motion Encoder
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.
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
