Different Conceptual Designs Different Conceptual Designs Designs for

Different Conceptual Designs

Different Conceptual Designs

Designs for Further Consideration and Evaluation NECKLACE BELT VEST

Concept Evaluation Criteria �Directionally Intuitive �Simple User Interface �One Size Fits All �Recognizable Feedback to User �Versatile �Relatively Inconspicuous

PUGH Method �Necklace �Vest �Belt/Fanny Pack

PUGH Method

PUGH Method

PUGH Method

Final Designs: General Design �Vibrating Feedback Motors �Modular Design �Magnetometer

Functional Decomposition

Benefits of Final Design �Inconspicuous in Nature �Comfortable Placement for User �Intuitive to User �Reliable Directionality �Consistent Feedback �Client Approved (Interview with Potential Customer)

Combination of Components �Modular design with vibration �Stationary placement for directional device �Heat dissipation and location �Reduced potential for damage

Final Design: Keypad �Pad Size: 2. 0” x 1. 5” x 0. 1” �Weight: 0. 17 oz �Connector: 7 pins (Pitch 2. 54 mm) �Maximum Circuit Rating: 35 VDC, 100 m. A

Final Design: Magnetometer HMC 6352 § 0. 6” x 0. 6” �Simple, clean, degree resolution compass heading with full integration of 2 -Axis magnetic sensors and electronics § Cost: $34. 95 http: //www. sparkfun. com/products/7915 HMC 6343 § 0. 8” x 0. 8” § 3 -axis accelerometer with tilt compensation § Cost: $149. 95 http: //www. sparkfun. com/products/8656

Final Design: Magnetometer LSM 303 Breakout Board § 2. 0 cm × 2. 0 cm § 3 -axis accelerometer combined with a 3 -axis magnetic sensor § Cost: $29. 95 http: //www. sparkfun. com/products/10703 **Micro-controller must be selected first, so it can be determined where or not the digital compass will be able to affectively interact. (MCU selected might already include a digital compass)

Final Design: Radio-Frequency IDentification System Includes: �A scanning antenna �A transceiver with a decoder to interpret the data �A transponder - the RFID tag **Antenna puts out radio-frequency signals in a relatively short range. Providing the RFID tags with the energy to communicate with the reader.

Final Design: RFID Antenna �Light weight (>1 lb) and only 8. 5 inches square �Superior performance � 8 d. Bi gain with broad coverage �It is suitable for both indoor and outdoor wireless applications in the 900 MHz ISM band, GSM, 900 MHz cellular and RFID applications.

Final Design: RFID Reader

Final Design: RFID Tags