Optoreflector - Revision history

129.105.69.231: /* Example Analog Circuit */

2006-08-11T15:23:26Z

Example Analog Circuit

← Older revision		Revision as of 10:23, 11 August 2006
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	[[Image:optoreflector_analog_photo.jpg\|400 px]]		[[Image:optoreflector_analog_photo.jpg\|400 px]]

	The Simulink model for the example above can be downloaded here:[[~~Image~~:optoreflector_analog_XPC_program.zip]]		The Simulink model for the example above can be downloaded here:[[media:optoreflector_analog_XPC_program.zip\|optoreflector_analog_XPC_program.zip]]

129.105.69.231: /* Example Digital Circuit 2 */

2006-08-11T15:23:03Z

Example Digital Circuit 2

← Older revision		Revision as of 10:23, 11 August 2006
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	The Simulink model can be downloaded here:		The Simulink model can be downloaded here:
	[[~~Image~~:optoreflector_ex2_XPC_program.zip]]		[[media:optoreflector_ex2_XPC_program.zip\|optoreflector_ex2_XPC_program.zip]]

	===Example Analog Circuit===		===Example Analog Circuit===

Hwang: /* Example Analog Circuit */

2006-08-11T01:33:24Z

Example Analog Circuit

← Older revision		Revision as of 20:33, 10 August 2006
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	[[Image:optoreflector_analog_photo.jpg\|400 px]]		[[Image:optoreflector_analog_photo.jpg\|400 px]]

	The Simulink model can be downloaded here:[[Image:optoreflector_analog_XPC_program.zip]]		The Simulink model for the example above can be downloaded here:[[Image:optoreflector_analog_XPC_program.zip]]

Hwang at 01:33, 11 August 2006

2006-08-11T01:33:07Z

← Older revision		Revision as of 20:33, 10 August 2006
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	[[Image:optoreflector_ex2_schematic.png]] [[Image:optoreflector_ex2_photo.jpg \|300 px]]		[[Image:optoreflector_ex2_schematic.png]] [[Image:optoreflector_ex2_photo.jpg \|300 px]]

	The following XPC ~~target~~ program will count the number of times the sensor is tripped, and print it to the [[Using_RS-232_and_Printing_to_LCD\|Seetron BPI-216 LCD]]. To use it, plug the output of the ciruit above into channel 2 of the digital input on the break-out board. Pressing ''Bit 1'' on the break-out board will reset the count.		The following XPC Target program will count the number of times the sensor is tripped, and print it to the [[Using_RS-232_and_Printing_to_LCD\|Seetron BPI-216 LCD]]. To use it, plug the output of the ciruit above into channel 2 of the digital input on the break-out board. Pressing ''Bit 1'' on the break-out board will reset the count.

	[[Image:optoreflector_ex2_photo2.jpg \| 400 px]]		[[Image:optoreflector_ex2_photo2.jpg \| 400 px]]

Hwang at 01:28, 11 August 2006

2006-08-11T01:28:34Z

← Older revision		Revision as of 20:28, 10 August 2006
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	[[Image:optoreflector_analog_schematic.png]]		[[Image:optoreflector_analog_schematic.png]]

	[[Image:optoreflector_analog_photo.jpg]]		[[Image:optoreflector_analog_photo.jpg\|400 px]]

	The Simulink model can be downloaded here:[[Image:optoreflector_analog_XPC_program.zip]]		The Simulink model can be downloaded here:[[Image:optoreflector_analog_XPC_program.zip]]

Hwang at 01:27, 11 August 2006

2006-08-11T01:27:40Z

← Older revision		Revision as of 20:27, 10 August 2006
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	__TOC__		__TOC__
	[[Category:Sensors]]		[[Category:Sensors]]
			==Introduction==
	Optoreflector sensors contain a matched infrared transmitter (LED) and infrared receiver (usually a [[Photodiodes and Phototransistors\|phototransistor]]) pair. These devices work by measuring the amount of light that is reflected into the receiver. Because the receiver also responds to ambient light, the device works best when well shielded from abient light, and when the distance between the sensor and the reflective surface is small (the graph below shows how distance affects the output value). IR reflectance sensors are often used to detect white and black surfaces. White surfaces generally reflect well, while black surfaces reflect poorly.		Optoreflector sensors contain a matched infrared transmitter (LED) and infrared receiver (usually a [[Photodiodes and Phototransistors\|phototransistor]]) pair. These devices work by measuring the amount of light that is reflected into the receiver. Because the receiver also responds to ambient light, the device works best when well shielded from abient light, and when the distance between the sensor and the reflective surface is small (the graph below shows how distance affects the output value). IR reflectance sensors are often used to detect white and black surfaces. White surfaces generally reflect well, while black surfaces reflect poorly.

Hwang at 01:27, 11 August 2006

2006-08-11T01:27:22Z

← Older revision		Revision as of 20:27, 10 August 2006
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			__TOC__
	[[Category:Sensors]]		[[Category:Sensors]]
	Optoreflector sensors contain a matched infrared transmitter (LED) and infrared receiver (usually a [[Photodiodes and Phototransistors\|phototransistor]]) pair. These devices work by measuring the amount of light that is reflected into the receiver. Because the receiver also responds to ambient light, the device works best when well shielded from abient light, and when the distance between the sensor and the reflective surface is small (the graph below shows how distance affects the output value). IR reflectance sensors are often used to detect white and black surfaces. White surfaces generally reflect well, while black surfaces reflect poorly.		Optoreflector sensors contain a matched infrared transmitter (LED) and infrared receiver (usually a [[Photodiodes and Phototransistors\|phototransistor]]) pair. These devices work by measuring the amount of light that is reflected into the receiver. Because the receiver also responds to ambient light, the device works best when well shielded from abient light, and when the distance between the sensor and the reflective surface is small (the graph below shows how distance affects the output value). IR reflectance sensors are often used to detect white and black surfaces. White surfaces generally reflect well, while black surfaces reflect poorly.
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	[[Image:optoreflector_ex2_photo2.jpg \| 400 px]]		[[Image:optoreflector_ex2_photo2.jpg \| 400 px]]

			The Simulink model can be downloaded here:
	[[Image:optoreflector_ex2_XPC_program.zip]]		[[Image:optoreflector_ex2_XPC_program.zip]]

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	[[Image:optoreflector_analog_photo.jpg]]		[[Image:optoreflector_analog_photo.jpg]]

	[[Image:optoreflector_analog_XPC_program.zip]]		The Simulink model can be downloaded here:[[Image:optoreflector_analog_XPC_program.zip]]

Hwang: /* Application */

2006-08-11T01:26:24Z

Application

← Older revision		Revision as of 20:26, 10 August 2006
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	[[image:qrb1114 xpc program.jpg\|center]]		[[image:qrb1114 xpc program.jpg\|center]]

	===Example Circuit 2===		===Example Digital Circuit 2===
	The circuit below uses hardware to process the signal and uses the PC/104 stack's digital input. Increasing the value of the resistor ''R1'' will increase the sensitivity, and vice versa. Beware that if you make the sensor too sensitive, ambient light will be able to trip the sensor.		The circuit below uses hardware to process the signal and uses the PC/104 stack's digital input. Increasing the value of the resistor ''R1'' will increase the sensitivity, and vice versa. Beware that if you make the sensor too sensitive, ambient light will be able to trip the sensor.

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	[[Image:optoreflector_ex2_XPC_program.zip]]		[[Image:optoreflector_ex2_XPC_program.zip]]

			===Example Analog Circuit===
			To make an analog circuit, just take out the Schmitt trigger from Example Digital Circuit 2, and connect the input directly to the analog input on the break-out board. The ADC will output the closest integer voltage of the input between -10V and 10V. For this circuit, the voltage will fall between 0V and 5V.

			[[Image:optoreflector_analog_schematic.png]]

			[[Image:optoreflector_analog_photo.jpg]]

			[[Image:optoreflector_analog_XPC_program.zip]]

Hwang: /* Application */

2006-08-11T01:20:47Z

Application

← Older revision		Revision as of 20:20, 10 August 2006
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	==Application==		==Application==
	===Example ~~Circuit~~ 1===		===Example Digital Circuit===
	In the mechatronics lab, we have the QRB1114 ([[media:QRB1114.pdf\|datasheet]]) from [http://www.fairchild.com Fairchild], shown below. It has four pins, with the first pair connected to the LED and the second pair connected to the phototransistor.		In the mechatronics lab, we have the QRB1114 ([[media:QRB1114.pdf\|datasheet]]) from [http://www.fairchild.com Fairchild], shown below. It has four pins, with the first pair connected to the LED and the second pair connected to the phototransistor.

Hwang: /* Example Circuit 2 */

2006-08-11T00:27:57Z

Example Circuit 2

← Older revision		Revision as of 19:27, 10 August 2006
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	The circuit below uses hardware to process the signal and uses the PC/104 stack's digital input. Increasing the value of the resistor ''R1'' will increase the sensitivity, and vice versa. Beware that if you make the sensor too sensitive, ambient light will be able to trip the sensor.		The circuit below uses hardware to process the signal and uses the PC/104 stack's digital input. Increasing the value of the resistor ''R1'' will increase the sensitivity, and vice versa. Beware that if you make the sensor too sensitive, ambient light will be able to trip the sensor.

	[[Image:optoreflector_ex2_schematic.png]] [[Image:optoreflector_ex2_photo.jpg]]		[[Image:optoreflector_ex2_schematic.png]] [[Image:optoreflector_ex2_photo.jpg \|300 px]]

	The following XPC target program will count the number of times the sensor is tripped, and print it to the [[Using_RS-232_and_Printing_to_LCD\|Seetron BPI-216 LCD]]. To use it, plug the output of the ciruit above into channel 2 of the digital input on the break-out board. Pressing ''Bit 1'' on the break-out board will reset the count.		The following XPC target program will count the number of times the sensor is tripped, and print it to the [[Using_RS-232_and_Printing_to_LCD\|Seetron BPI-216 LCD]]. To use it, plug the output of the ciruit above into channel 2 of the digital input on the break-out board. Pressing ''Bit 1'' on the break-out board will reset the count.

← Older revision		Revision as of 20:33, 10 August 2006
Line 28:		Line 28:
	[[Image:optoreflector_ex2_schematic.png]] [[Image:optoreflector_ex2_photo.jpg \|300 px]]		[[Image:optoreflector_ex2_schematic.png]] [[Image:optoreflector_ex2_photo.jpg \|300 px]]

	The following XPC ~~target~~ program will count the number of times the sensor is tripped, and print it to the [[Using_RS-232_and_Printing_to_LCD\|Seetron BPI-216 LCD]]. To use it, plug the output of the ciruit above into channel 2 of the digital input on the break-out board. Pressing ''Bit 1'' on the break-out board will reset the count.		The following XPC Target program will count the number of times the sensor is tripped, and print it to the [[Using_RS-232_and_Printing_to_LCD\|Seetron BPI-216 LCD]]. To use it, plug the output of the ciruit above into channel 2 of the digital input on the break-out board. Pressing ''Bit 1'' on the break-out board will reset the count.

	[[Image:optoreflector_ex2_photo2.jpg \| 400 px]]		[[Image:optoreflector_ex2_photo2.jpg \| 400 px]]