logging in or signing up IR Sensor Ming Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 3419 Category: Entertainment License: All Rights Reserved Like it (1) Dislike it (0) Added: November 15, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Engineering Design: Sensor System: Engineering Design: Sensor SystemTechnical Goal: Technical Goal Design an electronic sensor that: distinguishes between tile floor and electrical tape output compatible with a microcontrollerEngineering Design Methods: Engineering Design Methods Engineering ProblemCommon Steps in Design: Common Steps in Design Specification planning & development Concept generation Product embodiment Insert: Reverse EngineeringReverse Engineering?: Reverse Engineering? Observe an existing product “Dissassemble” the product Analyze and test function, form physical principles manufacturabilityExample: F150 Pickup: Example: F150 Pickup 55 Years!2004 F150 Improvements: 2004 F150 Improvements Stiffer frame New interior (length & appearance) +15% peak power (same size engine) outboard rear shocks, wider springs 2” deeper cargo box Tailgate Assist (easier to lift)10 Reverse Engineering Steps: 10 Reverse Engineering Steps Predict product behavior Dissassemble (to experience it) Learn & document actual function Experience principles of the solution Identify special functionality/interaction Mathematically model the product Solve the model … (cont’d)10 Reverse Engineering Steps: 10 Reverse Engineering Steps Create a variant product, or tweak something Adapt a subsystem, or redesign at a higher level of complexity Redesign the entire product Result: an original design Kristin L. Wood (UT-Austin) & Kevin N. Otto (MIT)Results?: Results? May be an incremental improvement Ford F150 truck May be a whole new design Volkswagen New Beetle THEN: aircooled engine, rear engine/rear drive, manual transmission, lousy heat, inexpensive car for the masses NOW: watercooled engine, FWD, all comforts, expensive car for girls (flower vase)F150 SuperCrew: F150 SuperCrew 2001-2004: clockwise from upper leftVolkswagen Beetles: Volkswagen BeetlesReverse Engineering: Ethics: Reverse Engineering: Ethics See IEEE-USA Position Statement at course FTP site: IEEE_reverse.html www.ieeeusa.org/forum/positions/reverse.html Recognize value of intellectual property This is a fundamental tool Key: LAWFUL reverse engineeringBasic Principles: Basic Principles Do NOT reverse engineer if procurement contract forbids it. Use only data in public domain Do not use proprietary information. those who recently worked for competitor visiting or touring competitor’s site Maintain complete documentationInfrared Position Sensor: Infrared Position Sensor Emitter Detector Principle: Reflected energy is a function of surface characteristicA Well-Known Solution: A Well-Known Solution R1 limits diode current R2 affects output voltageUnderlying Science: Emitter: Underlying Science: Emitter Diode forward voltage drop is essentially constant VD = 1.7V @ 20 mA ? Kirchoff’s voltage law: VCC + (I R1) + VD = 0 Choices: VCC and IUnderlying Science: Detector: Underlying Science: Detector Collector current IC related to IR energy VCE is governed by collector currrent and R2 VCE = VCC – (IC R2) “dark current” is miniscule “ON current” is a few milliamps?Remaining Steps: Remaining Steps Experimentation and Tweaking Analyze and test to understand diode and phototransistor behavior swap position of R2 and Q reverses input/output characteristic changes output impedance Remember to keep complete documentation of work.Typical Sensor Characteristic: Typical Sensor Characteristic VCE position (mm) VCC Linear operating regionDatasheets at FTP site: Datasheets at FTP site Infrared Emitter Diode Kingbright L53F3C filename: IR_diode.pdf Infrared Phototransistor Kingbright L53P3C filename: IR_phototransistor.pdfAnother Example: Another Example Designing microcontroller program code: Acquire code example Dissect code Learn actual code functions Result: Variant, Adapted, or New Code Final Thought on Reverse Engineering: Final Thought on Reverse Engineering “The Reason that I have been so successful is that I’ve stood on the shoulders of giants.” Thomas Alva Edison You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
IR Sensor Ming Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 3419 Category: Entertainment License: All Rights Reserved Like it (1) Dislike it (0) Added: November 15, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Engineering Design: Sensor System: Engineering Design: Sensor SystemTechnical Goal: Technical Goal Design an electronic sensor that: distinguishes between tile floor and electrical tape output compatible with a microcontrollerEngineering Design Methods: Engineering Design Methods Engineering ProblemCommon Steps in Design: Common Steps in Design Specification planning & development Concept generation Product embodiment Insert: Reverse EngineeringReverse Engineering?: Reverse Engineering? Observe an existing product “Dissassemble” the product Analyze and test function, form physical principles manufacturabilityExample: F150 Pickup: Example: F150 Pickup 55 Years!2004 F150 Improvements: 2004 F150 Improvements Stiffer frame New interior (length & appearance) +15% peak power (same size engine) outboard rear shocks, wider springs 2” deeper cargo box Tailgate Assist (easier to lift)10 Reverse Engineering Steps: 10 Reverse Engineering Steps Predict product behavior Dissassemble (to experience it) Learn & document actual function Experience principles of the solution Identify special functionality/interaction Mathematically model the product Solve the model … (cont’d)10 Reverse Engineering Steps: 10 Reverse Engineering Steps Create a variant product, or tweak something Adapt a subsystem, or redesign at a higher level of complexity Redesign the entire product Result: an original design Kristin L. Wood (UT-Austin) & Kevin N. Otto (MIT)Results?: Results? May be an incremental improvement Ford F150 truck May be a whole new design Volkswagen New Beetle THEN: aircooled engine, rear engine/rear drive, manual transmission, lousy heat, inexpensive car for the masses NOW: watercooled engine, FWD, all comforts, expensive car for girls (flower vase)F150 SuperCrew: F150 SuperCrew 2001-2004: clockwise from upper leftVolkswagen Beetles: Volkswagen BeetlesReverse Engineering: Ethics: Reverse Engineering: Ethics See IEEE-USA Position Statement at course FTP site: IEEE_reverse.html www.ieeeusa.org/forum/positions/reverse.html Recognize value of intellectual property This is a fundamental tool Key: LAWFUL reverse engineeringBasic Principles: Basic Principles Do NOT reverse engineer if procurement contract forbids it. Use only data in public domain Do not use proprietary information. those who recently worked for competitor visiting or touring competitor’s site Maintain complete documentationInfrared Position Sensor: Infrared Position Sensor Emitter Detector Principle: Reflected energy is a function of surface characteristicA Well-Known Solution: A Well-Known Solution R1 limits diode current R2 affects output voltageUnderlying Science: Emitter: Underlying Science: Emitter Diode forward voltage drop is essentially constant VD = 1.7V @ 20 mA ? Kirchoff’s voltage law: VCC + (I R1) + VD = 0 Choices: VCC and IUnderlying Science: Detector: Underlying Science: Detector Collector current IC related to IR energy VCE is governed by collector currrent and R2 VCE = VCC – (IC R2) “dark current” is miniscule “ON current” is a few milliamps?Remaining Steps: Remaining Steps Experimentation and Tweaking Analyze and test to understand diode and phototransistor behavior swap position of R2 and Q reverses input/output characteristic changes output impedance Remember to keep complete documentation of work.Typical Sensor Characteristic: Typical Sensor Characteristic VCE position (mm) VCC Linear operating regionDatasheets at FTP site: Datasheets at FTP site Infrared Emitter Diode Kingbright L53F3C filename: IR_diode.pdf Infrared Phototransistor Kingbright L53P3C filename: IR_phototransistor.pdfAnother Example: Another Example Designing microcontroller program code: Acquire code example Dissect code Learn actual code functions Result: Variant, Adapted, or New Code Final Thought on Reverse Engineering: Final Thought on Reverse Engineering “The Reason that I have been so successful is that I’ve stood on the shoulders of giants.” Thomas Alva Edison