1. INTRODUCTION TO ELECTRONIC INSTRUMENTATION
Chapter 7 INTC 1305 – 01
SPEED and VIBRATION
Vern Wilson

2. Review of Chapter 6 Analytical Instruments
Instruments designed to monitor chemical and physical properties of a process stream
These are instruments that can continuously monitor a process stream
The analyzer system catches a sample, sends it to an analyzer, conditions the sample, analyzes the sample and returns the sample to the system

3. CHAPTER 7 SPEED
Speed and Vibration

4. VIBRATION Vibration is a random movement of an object
Vibration meters are used to measure velocity, acceleration or displacement
Usually have a sensor, amplifier and output devices
Vibration is measured in large or high speed equipment to prevent catastrophic failure

5. Vibration Types AXIAL – side to side RADIAL – out of round
Measured with an Accelerometer
Self activated – Piezoelectric sensor
Heavy metal sitting on a crystal – strained in motion
Creates a voltage output which is transduced and converted to a digital readout

6. Speed Speed = Distance traveled per unit of time
Velocity = Speed with a direction
Speed is measured with a sensor and a readout
Sensors include tachometers, induction measurement, or magnetic proximity signal
Speed is either rectilinear (mph) or rotational (rpm)
Car speed is measured by rpm and tire circumference

7. Conversions 1 mile = 5280 feet 1 knot = 1.15 miles
1 kilometer = miles
1 yard = 36 inches
1 meter = inches
1 mile = 1.61 kilometers

8. Exercise #1 = 2 hours Speed = 70 mph Distance to travel = 140 miles
How long does it take = 140 m/ 70 mph
= 2 hours

9. Exercise #2 Time = 165 m / 75 mph 2.2 hours 2 hours and 12 minutes
Graham, Texas is about 165 miles
Speed = 75 mph
Calculate time to drive to Graham
Time = 165 m / 75 mph
2.2 hours
2 hours and 12 minutes
Determine the Velocity if the heading is 315°
315° = NW
The velocity is 75 mph NW

10. Exercise #3
Pittsburgh is 1400 miles from Corsicana on a heading of 45°
We are driving at 55 mph
How long will it take?
What is our velocity?

11. Exercise #4
We are 1250 miles from Atlanta, Georgia on a heading of 90°
We are traveling at 180 knots
How long will it take?
What is our velocity?

12. Exercise #5 It is 116,160 feet to Blooming Grove, Texas
You are walking at 1 mile every 14 minutes
How long does it take for you to walk to Blooming Grove?

13. Exercise #6 Homework It is 1300 miles to Los Angeles on a 270° heading
We are driving at 53 mph
How long will the trip take?
What is our velocity?