2017:Electrical Main: Difference between revisions
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== Sensor Measurements: == | == Sensor Measurements: == | ||
*SW1839-ND | |||
*MB1010 LV-MaxSonar-EZ1 | |||
**Ultrasonic (sonar) sensor | |||
**Set up on bench at a height of 9" | |||
**Monitored analog output with voltmeter - with the 5V supply, scaling is 9.76V/inch | |||
**First tried a flat board approx 12X16 oriented perpendicular to the sensor: | |||
***with board at 12", measurement was 10" | |||
***with board at 16", measurement was 15" | |||
***with board at 24", measurement was 23" | |||
**With board laid down flat on tabletop, approx 3/4" thick: | |||
***with board front edge at 24", measurement was 25" | |||
***with board front edge at 16", measurement was 17" | |||
**With board horizontal but held at the same height at the center of the sensor: | |||
***with board front edge at 24", measurement was 22" | |||
**With a Fuel ball on the tabletop, the senter of the ball approx 6.5" below the center of the sensor:: | |||
***with the front of the ball at 12", measurement was 10" | |||
***with the front of the ball at 16", measurement was 15" | |||
***with the front of the ball at 24", measurement was 22" | |||
**Conclusions: | |||
***the sensor can be fooled by any object within it's field of view - the measurement will be of the closest object, even if it is not the largest object. | |||
***Accuracy between different sized objects at the same distance may be about 2" variation. | |||
***Depending upon the mounting height of the sensor, it will respond to objects on the floor. | |||
***A narrower field of view might be desireable. | |||
**Calibration: | |||
***The sensor was power cycled with a shoeboz at 24" from the sensor. | |||
***The initial value was very repeatable at powerup with a reading of 24.9" | |||
= Archives = | = Archives = | ||
Revision as of 18:15, 28 January 2017
Insert details/designs/drawings/info/notes relevant to overall electrical systems here....
Speed Controllers
Circuit Breakers
Sensors
Sensor Types
- Shaft Encoders
- Grayhill 63R256 and 61KS256 optical shaft encoders are presently used.
- Present availability as of 1/15/17:
- 63R256: Digikey $77 with 206 in stock, Newark $87 with no stock, Mouser $54 with 1 in stock
- 61KS256: Digikey $62 with no stock, Newark $81 with 7 in stock, Mouser $67 with 18 in stock
- Both are electrically the same and the physical dimensions are the same
- Both are 256 pulses per revolution
- Present availability as of 1/15/17:
- Magnetic shaft encoder
- Grayhill 63R256 and 61KS256 optical shaft encoders are presently used.
- Optical Beam Sensors (Banner-like)
- Omron SW1839-ND or similar
- Sheets/Omron PDFs/E3F_E3R.pdf Panasonic EX-10 Series
Sensor Measurements:
- SW1839-ND
- MB1010 LV-MaxSonar-EZ1
- Ultrasonic (sonar) sensor
- Set up on bench at a height of 9"
- Monitored analog output with voltmeter - with the 5V supply, scaling is 9.76V/inch
- First tried a flat board approx 12X16 oriented perpendicular to the sensor:
- with board at 12", measurement was 10"
- with board at 16", measurement was 15"
- with board at 24", measurement was 23"
- With board laid down flat on tabletop, approx 3/4" thick:
- with board front edge at 24", measurement was 25"
- with board front edge at 16", measurement was 17"
- With board horizontal but held at the same height at the center of the sensor:
- with board front edge at 24", measurement was 22"
- With a Fuel ball on the tabletop, the senter of the ball approx 6.5" below the center of the sensor::
- with the front of the ball at 12", measurement was 10"
- with the front of the ball at 16", measurement was 15"
- with the front of the ball at 24", measurement was 22"
- Conclusions:
- the sensor can be fooled by any object within it's field of view - the measurement will be of the closest object, even if it is not the largest object.
- Accuracy between different sized objects at the same distance may be about 2" variation.
- Depending upon the mounting height of the sensor, it will respond to objects on the floor.
- A narrower field of view might be desireable.
- Calibration:
- The sensor was power cycled with a shoeboz at 24" from the sensor.
- The initial value was very repeatable at powerup with a reading of 24.9"
