122-28029 Parallax Inc, 122-28029 Datasheet - Page 223
122-28029
Manufacturer Part Number
122-28029
Description
GUIDE STUDENT SMART SENSORS
Manufacturer
Parallax Inc
Datasheet
1.122-28029.pdf
(340 pages)
Specifications of 122-28029
Accessory Type
Manual
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Smart Sensors
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
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Chapter 6: Accelerometer Projects · Page 211
Chapter 6: More Accelerometer Projects
There are three types of projects in this chapter. The first type is a direct application of
hardware and programs that were used in earlier chapters. The second type requires
datalogging of the acceleration measurements, and so several activities are devoted to a
datalogging program. The third type requires datalogging to figure out what kind of
measurements the accelerometer will report. Then, based on the datalogging results, you
will have enough information to write a program to make the device work reliably.
ACTIVITY #1: MEASURE HEIGHTS OF BUILDINGS, TREES, ETC.
Climbing to the top of an object to measure its height is not always convenient, practical,
or even safe. This activity introduces a novel way to use some of the accelerometer
measurements developed in Chapter 3 to make height measurements from a safe vantage
point on the ground.
Sighting the Top and Determining Height
Figure 6-1 shows a scheme for measuring the height of an object, using the accelerometer
and LCD display as an angle-sight. First, sight the top of the object with the edge of your
board, and record the measured angle. Then, measure the distance between the spot you
took your measurement and the object, which is the adjacent side shown in Figure 6-1.
The adjacent distance, the angle θ, and the height of the accelerometer above the ground
are the three key pieces of information you need to calculate the object height.
Figure 6-1: Determining Height with Line-of-Sight
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