REU SUMMER 2012 SENSOR PROJECT Alan Young 7/5/12

Mechanical Sensing System Goals for project – Conduct initial literature review – Select an appropriate distance sensor and a pressure sensor to interface with a system – Use LabVIEW to measure the signals from the sensors and display on a computer

Literature Review How to use sensors for distance measurement: pdf pdf How to use sensors for pressure measurement:

Rough sketch of mechanical system

Mechanical Sensor System Base Borrowed base from the Nanofab laboratory Displacement Sensor will attach a cylinder Pressure sensing pad will be located under the cylinder

Uses for project Assembly line worker Robotics research Automated stamper Robot that can type on a keyboard Research ways to incorporate sensors to any mechanical system

Displacement Sensors

SICK Displacement sensor Model name: SICK DT10Type: Red LED Sensor tal/TopFrameset.aspx?lefttarget=../ProductC atalog/Leftnav.aspx%3Fcategory=Produktfind er&righttarget=../ProductCatalog/Datasheet. aspx%3FProductID= tal/TopFrameset.aspx?lefttarget=../ProductC atalog/Leftnav.aspx%3Fcategory=Produktfind er&righttarget=../ProductCatalog/Datasheet. aspx%3FProductID= mm to 500 mm range 3 mm resolution Analog output, Cable interface 2m Cable costs $50 Need to put wires onto a DAQ, which plugs in via USB to a computer Works with NI DAQ: ng/en/pg/1/sn/n17:daq,n36:18/ ng/en/pg/1/sn/n17:daq,n36:18/ $359 Needs a power supply (on-off switch)

Keyence Laser distance sensor Model name: Keyence IL-100Type: Laser roducts/sensors/laser/il/il_s pecifications_1.php?style=p rint roducts/sensors/laser/il/il_s pecifications_1.php?style=p rint $1,490 $299 RS-232 adapter OR 4-20mA or -5 to 5V outputs

Tactile Sensors

Force Imaging Array from UneoTech om/ucctw/index.php?o ption=com_k2&view=it em&layout=item&id=17 3&Itemid=147&lang=en om/ucctw/index.php?o ption=com_k2&view=it em&layout=item&id=17 3&Itemid=147&lang=en $10,000 Comes with sensor pad, electronics controller, and software

Pressure Sensing Sheet from Sensible UI om/buy om/buy Initial Resolution: 4.5mm $ USB interface with computer Sold out!!!

Interface Options

Data Acquisition Board cds/view/p/lang/en/nid / cds/view/p/lang/en/nid / NI 9219 $ Need to make sure one or both sensors are compatible with the DAQ

Distance Sensor Interfaces SICK DT10 Has an analog voltage or current that can be plugged into the DAQ Must buy a DAQ that costs around $1000 Total price: ~$1300 Resolution of 3mm Cheaper, but less resolution Keyence IL-100 Has an option to have an RS-232 adapter, eliminating the need for a DAQ Total price: ~$1789 Resolution of mm More expensive, but much better resolution

Summary

Products Product NameTolerancesRangeInterfacesPrice SICK DT103 mm to 5 mm50 to 500 mmAnalog current$389 Keyence IL mm75 to 130 mmRS-232$1789 SICK OD mm100 to 400 mmAnalog current$1000 Product NameTolerances & Resolution DimensionsInterfacesPrice Inventables Pressure- Sensing Sheet 5 to 25%, 20g to 10 kg Customizable, 8” by 8” preferred Analog resistance $ Tekscan 3200Unspecified, 0 to 100 psi 6.6” by 6.6”Pressure distribution map software included $15,000… too expensive! Sensible UIUnspecified, 4.5mm spatial resolution 7.87” by 7.4”USB$399 Distance Sensors Pressure Sensors

Recommended choices Displacement sensor: SICK DT10, $389. Reasons: – Reasonable resolution (3 mm) – Interfaces with DAQ via wires and analog current – DAQ can be used with other sensors Pressure sensor: SensibleUI, $399. However, currently sold out and need to wait to order. Reasons: – Other sensors are >$5k or are not interfacable/don’t show a pressure distribution

Other goals Order the pressure sensor Create a contour plot of force generated from the pressure sensor Actuate the mechanical system and control it via LabVIEW Create publication

Questions?