OPTICOM MIL-STD-810F Manuale utente

Opticom Technologies Inc.

SAE J1455 and MIL-STD-810F

Vibration Testing of

Model CC-02-4.3

CCTV Camera

Prepared by: Weir-Jones Engineering Consultants Ltd.

2040 West 10th Avenue

Vancouver, B.C.

V6J 2B3

Tel: 604 732-8821

Fax: 604 732-4801

E-mail: [email protected]om

Web: www.weir-jones.com

ISO 9001:2000 Registered

June 17 , 2005

Weir-Jones Engineering Consultants Ltd. 30144-REP-001-0.wp9

AUTHORIZATION

The work described in this report was authorized by David Boyd of Opticom Technologies

Inc. on June10 , 2005. The report was prepared by Paul Chong, P.Eng.

Paul Chong, P.Eng.

Project Engineer

Dated at Vancouver, June 17 , 2005.

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TABLE OF CONTENTS

1.0 INTRODUCTION .......................................................1

2.0 VIBRATIONPROFILES .................................................1

3.0 VIBRATIONTESTEQUIPMENT ..........................................3

4.0 RESULTS .............................................................5

4.1 SinusoidalVibrationTest ...........................................5

4.2 RandomVibrationTest .............................................5

APPENDIX1: CalibrationCertificates ............................................7

APPENDIX2: SinusoidalTestResults ...........................................12

APPENDIX3: RandomTestResults .............................................14

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1.0 INTRODUCTION

On June 10 , 2005 Weir-Jones Engineering Consultants Ltd. (WJEC) was retained by

Opticom Technologies Inc. to perform a set of vibration tests on its Model CC-02-4.3 CCTV camera.

The primary objective in testing the camera was to verify its structural integrity. This was done by

subjecting the unit to the worst-case vibrational stresses expected in its application environment.

The testing consisted of vibrating the Model CC-02-4.3 CCTV camera in the two mutually

perpendicular axes in accordance with the profiles defined in Sections 4.9 of the SAE J1455 (August

1994) Standard and Method 514.5 of the MIL-STD-810F (January 2000) Standard. The testing of

the camera was performed on June 14 and 15 , 2005.

th th

2.0 VIBRATION PROFILES

The vibration testing of theModel CC-02-4.3 CCTV camera comprised of subjecting the unit

to the Sinusoidal profile as defined in Section 4.9 of the SAE J1455 (August 1994) Standard and to

the Random profile as defined in Method 514.5 of the MIL-STD-810F (January2000) Standard. The

parameters of the Sinusoidal and Random profiles are summarized below with the graphical

representation of the Sinusoidal profile shown in Figure 1 and that of the Random profile shown in

Figure 2.

Sinusoidal (truck chassis-mounted)

Amplitude*- 2 G’s from 10 to 12 Hz

2.5 G’s from 12 to 14 Hz

3 G’s from 14 to 16 Hz

3.5 G’s from 16 to 18 Hz

4 G’s from 18 to 2,000 Hz

Sweep rate - 0.5 octave per minute

Duration - 180 minutes per axis for each axis. Unit to be operational as

intended during testing.

*the step function is intended to simulate the ramp-up from 10 to 20 Hz.

Random (Basic Transportation for U.S. Highway Truck)

Breakpoints - as per Figure 514.5C-1

10 Hz ÿ0.015 G /Hz

40 Hz ÿ0.015 G /Hz

500 Hz ÿ0.00015 G /Hz

RMS

Overall G level of 1.04

Duration - 60 minutes is equivalent to 1,000 miles of travel. Unit is

recommended to be operational as intended during testing.

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Blue - Vibration profile

Red - Upper and lower limits of frequency and acceleration (equivalent to ±3dB)

Figure 1: Graphical plot of the SAE J1455 Sinusoidal vibration profile intended for equipment

to be mounted on truck chassis.

Blue - Vibration profile

Red - Upper and lower limits of frequency and amplitude (equivalent to ±6dB)

Figure 2: Graphical plot of the MIL-STD-801F Random vibration profile (U.S. Highway

Truck). It should be noted that the amplitude shown in the plot has been reduced by

-9dB.

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3.0 VIBRATION TEST EQUIPMENT

The equipment required for the vibration tests was a shaker, a vibration controller and two

feedback accelerometers (see Figure 3). The specifications of the equipment used are as follows.

Shaker: Manufacturer: Ling Dynamic Systems (LDS)

Model: V722

Rated Force: 750 lbf. rms (Random)

Frequency: 5 Hz - 4000 Hz

Maximum Displacement: 1 inch peak-to-peak

Maximum Velocity: 40 inch/sec peak

Maximum Acceleration: 50g rms (Random)

Maximum Payload: 220 lbs (total weight)

Driven by: LDS PA2000 2kW power amplifier

Controlled by: LDS DVC 4000 Mk3

Accelerometer: Manufacturer: PCB

Model: J357B01 (charge capacitance type)

Serial: 8968, 8969

Range: ±1800 g

The vibration controller and feedback accelerometers were calibrated on March 21 , 2005 by

Ralco Inc. in North Haven, Connecticut, in compliance with ANSI/NCSL Z540-1 and traceable to

NIST. The calibration certificates of the controller and accelerometers are provided in Appendix 1.

Power amplifier

Vibration controller

Vibration shaker

Figure 3: Weir-Jones Engineering Consultants Ltd. vibration testing equipment. Note that the

direction of shaker movement is vertical.

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As the vibration shaker was designed to translate in the vertical direction only, a set of

Aluminum mounting fixtures were used to position the CCTV camera in its two mutually

perpendicular axes (Vertical and Transverse) as shown in Figures 4A and 4B.

Feedback accelerometers

Figure 4A: Vertical orientation mounting of the CCTV camera.

Figure 4B: Transverse orientation mounting of the CCTV camera.

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4.0 RESULTS

4.1 Sinusoidal Vibration Test

The graphical results of the Sinusoidal vibration tests for the Model CC-02-4.3 CCTV

camera are shown in Appendix 2 located in the back of this report. The interpretation of the lines

on each graphical result is as follows:

Line Colour Description

Red Frequency limits and

Upper and lower limits of acceleration.

Dark Blue Vibration profile.

Light Blue Shaker output as measured by the feedback accelerometers.

Based on the graphical results, it can be seen that the shaker outputs as measured by the

feedback accelerometers corresponded with the defined Sinusoidal vibration profiles within the

allowable tolerance specified by the SAE J1455 (August 1994) Standard. Because the Model CC-

02-4.3 CCTV camera was rigidly mounted onto the mounting fixtures during the various Sinusoidal

vibration tests, the camera was therefore subjected to the same vibration profiles as those generated

by the shaker.

The following observations with respect to the CCTV camera were made during and after

the tests:

• No physical damage to the housing of the camera was noticeable during or after the tests.

• No loose components within the camera were noticeable during or after the tests.

• No degradation in the quality of the video produced by the camera was noticeable during or

after the tests.

Therefore the Model CC-02-4.3 CCTV camera has passed the chassis-mounted Sinusoidal vibration

test in accordance with Section 4.9 of the SAE J1455 (August 1994) Standard.

4.2 Random Vibration Test

The graphical results of the Random vibration tests for the Model CC-02-4.3 CCTV camera

are shown in Appendix 3 located in the back of this report. The interpretation of the lines on each

graphical result is as follows:

Line Colour Description

Red Frequency limits and

Upper and lower limits of acceleration.

Dark Blue Vibration profile.

Light Blue Shaker output as measured by the feedback accelerometers.

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Based on the graphical results, it can be seen that the shaker outputs as measured by the

feedback accelerometers corresponded with the defined Random vibration profile within the

allowable tolerance specified by Method 514.5 of the MIL-STD-810F (January 2000) Standard.

Because the Model CC-02-4.3 CCTV camera was rigidly mounted onto the mounting fixtures

during the testing, the camera was therefore subjected to the same vibration profiles as those

generated by the shaker.

The following observations with respect to the CCTV camera were made during and after

the tests:

• No physical damage to the housing of the camera was noticeable during or after the tests.

• No loose components within the camera were noticeable during or after the tests.

• No degradation in the quality of the video produced by the camera was noticeable during or

after the tests.

Therefore the Model CC-02-4.3 CCTV camera has passed the U.S. Highway Truck Random

vibration test in accordance with Method 514.5 of the MIL-STD-810F (January 2000) Standard.

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APPENDIX 1: Calibration Certificates

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