Instrumented Handgun

1
Instrumented Handgun

• Group 10 Final Report
• Presenter I-Che Lai

2
Project Justification

• Screen out inadequate applicants
• Safer training program

3
Design Requirements

• Variability of Handgun Attributes
• Barrel slide force 12 17 lb
• Trigger pull force 5 12 lb
• Trigger pull excursion 0.5 1.0 in
• Visible sight targeting

4
Design Requirements

• Telemetry of Handgun Orientation
• Measurement of acceleration and displacement in
  the x, y, and z direction
• Telemetry range up to 100m
• Sampling frequency of 1 kHz
• Budget of 5,000

5
Overview of Chosen Design

• Barrel Slide Spring Exchange
• Barrel slide force variability
• Trigger Spring Exchange
• Trigger pull force variability
• Trigger Bar Switch
• Trigger pull excursion variability

6
Overview of Chosen Design

• Laser Pointer
• Visible sight targeting
• Accelerometer / Gyroscope
• Measurement of handgun orientation
• Bluetooth (RF) Transmission
• Telemetry

7
The Instrumented Handgun
8
Barrel Slide Details

• Removal of barrel slide
• Selection of OEM springs
• 12 lb ? HK
• 13 lb ? Beretta
• 17 lb ? GLOCK

Recoil Spring
9
Trigger Spring Details

• Removal of trigger mechanism housing
• Selection of OEM Springs
• 5 lb ? GLOCK
• 8 lb NY ? Beretta
• 12 lb NY ? HK

Trigger Spring
10
Trigger Excursion Details

• Distance between trigger bar and thin rod sets
  trigger pull excursion length
• Adjust thin rod to three preset locations
  (grooves)

Movable Thin Rod
Trigger Bar
11
Laser Details

• Installed in the barrel
• Barrel diameter 10 mm
• Barrel length 114 mm
• Laser diode diameter 5.6 mm lt 10 mm
• Diode housing kit 6.4 mm lt 10 mm
• Supply voltage 3V battery

12
Telemetry Circuit Details
13
Power Consumption Analysis

• Telemetry Circuit 264.6 mA
• Laser Diode 85 mA
• Battery Capacity
• 655 mAH 9V
• 3x30mAH 3V

14
Weight Distribution Analysis

• GLOCK-22
• Magazine 78 325 g

15
Circuit Board Size Analysis

• Handle dimensions 114.3x31.75x22.2 (mm)

Maximum Circuit Dimensions 93.5x28x17.5 (mm)
16
Handgun Manufacturing

• Modifications to OEM GLOCK-22 by licensed
  gunsmith
• Removal of firing pin
• Barrel plugs
• Application of bright paint
• Installation of laser diode in barrel
• 658 nm laser diode with 3V battery source
• Installation of slide switch with rod

17
Handgun Accessories

• Handgun weights
• 52 g ? HK
• 200 g ? Beretta
• Barrel slide springs
• 12 lb ? HK
• 13 lb ? Beretta
• Trigger springs
• 8 lb New York Spring ? Beretta
• 12 lb New York ? HK

18
Circuit Manufacturing

• Fabrication of the two circuit boards by
  ExpressPCB
• Circuit schematics
• Circuit components
• Circuit board sizes

19
Labor Costs

• Software Engineering 1200
• Assembly and C programmer
• Gunsmith 800
• Licensed GLOCK gunsmith

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Required Materials Handgun
21
Required Materials Telemetry
22
Required Materials Overall
23
Project Aftermath

• Result of the Project
• Theoretical fulfillment of the requirements
• Future Considerations
• Prototype construction
• Acquisition of Beretta and HK specifications
• Trigger depression counter
• Development of efficient power supply

24
Project Aftermath

• Lessons Learned
• Handgun knowledge
• Personal limits
• Possible Different Approaches
• Better time management

25
Acknowledgements

• Scott D. Minor, PhD
• Project Mentor
• Joseph W. Klaesner, PhD
• Project Advisor
• Ronald Oldani, Sergeant
• Firearm Specialist
• Philip V. Bayly, PhD
• Mechanical Engineering Advisor
• Guy M. Genin, PhD
• Mechanical Engineering Advisor

26
Fin