Ultrasonic Rangefinder
The ultrasonic rangefinder features a one shot mode where distances up to 5.50m can be detected. Moreover, in this range, the reading is always within one centimeter of the true distance. The rangefinder can also detect velocities of objects within one meter per second for objects within 1.50m. Finally the rangefinder can enter scanning mode, where the transmitting and receiving transducers can be turned 45 degrees in either direction. Thus, the system can sweep across 90 degrees and find the distances. Because of its high accuracy and long range, the rangefinder can be used to find the distances for common household objects, and measure relatively short distances between objects. In addition, the rangefinder sweep mode can be used to get a profile of any surface. Finally a laser pointer is included to give the user an impression of what object in the distance is being measured.
Electrical characteristics
|
Parameter |
Conditions |
Min |
Typ |
Max |
Units |
|
Input
Voltage (supply1, supply2) |
T
= 25oC |
4,
- |
5,
12 |
6,
15 |
V |
|
Current
drawn |
|
|
220 |
|
mA |
|
Response
time |
T
= 25oC |
.26 |
|
108 |
ms |
|
Detected
distance |
T
= 25oC |
.09 |
|
5.50 |
m |
|
Detected
distance |
T
= 5oC |
.09 |
|
5.50 |
m |
|
Max
distance |
Dry
erase wall |
|
|
5.50 |
m |
|
|
Wood
panel |
|
|
4.80 |
m |
|
|
Stucco |
|
|
3.50 |
m |
|
|
Painted
wall |
|
|
3.85 |
m |
|
|
Metal
cabinet |
|
|
4.73 |
m |
|
Distance
Accuracy |
T
= 25oC |
|
±1.0 |
|
cm |
|
Velocities |
T
= 25oC |
-3.0 |
|
3.0 |
m/s |
|
Velocity
accuracy |
T
= 25oC |
|
±1.0 |
|
m/s |
|
Velocity
distance |
T
= 25oC |
0.20 |
|
1.5 |
m |
|
Temperature
of operation1 |
|
5 |
|
40 |
oC |
|
Degrees
of detection |
|
-45o |
|
45o |
|
|
Scan
cycle speed |
|
|
4*Response
time |
|
ms |
|
Beam
width |
T
= 25oC |
|
|
90 |
degrees |
1 note that at the temperature extremes, the device doesn’t function very well. To have full functionality, the device should be operated above 10oC.