Test assembly and method

• US 7,555,930 B2
• Filed: 07/18/2007
• Issued: 07/07/2009
• Est. Priority Date: 07/18/2007
• Status: Expired due to Fees

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Soh, Kok Tong, Lim, Jui Jing, Su, Ying, Ho, Hee Ching
• Primary Examiner(s): Noori; Max
• Application Number:
  US11/779,521
• Publication Number:
  US 20090019917A1
• Time in Patent Office: 720 Days
• Field of Search: 73 1201- 1214, 738/653
• US Class Current: 73/12.06
• CPC Class Codes: G01N 2203/0067 Fracture or rupture
• CPC Class Codes: G01N 2203/0676 Force, weight, load, energy, speed or acceleration
• CPC Class Codes: G01N 3/303 generated only by free-falling weight

Abstract

A test apparatus and method are disclosed. The test apparatus disclosed includes an accelerator assembly and holder assembly that releasably holds a test specimen for acceleration along an acceleration path. Following acceleration along the acceleration path, the test specimen is released from the holder assembly and drops to a landing. The landing can be formed of different materials and at different orientations depending upon the test specifications. Following impact with the landing, the shock robustness of the test specimen is determined to generate shock robustness data. In embodiments disclosed, shock data is used to design shock absorber components for the test specimen or product.

Claims

1. A test apparatus comprising:

an accelerator component movable along at least one rail to impart an acceleration to a test specimen along an acceleration path;

a holder assembly coupled to the acceleration component and movable along the acceleration path therewith and the holder assembly including a holder that is selectively operable between a clamped mode and a differently configured unclamped mode to releasably hold the test specimen; and

a release mechanism including a first release component coupled to the holder assembly and engageable with a second release component off-board from the accelerator component to operate the holder from the clamped mode to the unclamped mode and thereby release the test specimen from the holder assembly.

2. The test apparatus of claim 1 wherein the second release component is coupled to a platform elevated from a landing and the platform includes at least one end stop device configured to restrict movement of the holder assembly toward the landing.

3. The test apparatus of claim 1 and further comprising a platform elevated from a landing and the platform having an adjustable height.

4. The apparatus of claim 1 wherein the apparatus comprises:

a sensor device; and

a camera activated by the sensor device to capture one or more images of the test specimen proximate to a landing following release from the holder assembly.

5. The apparatus of claim 1 wherein the holder includes clamps coupled to clamp arms and the clamp arms are biased inwardly to hold the test specimen along the acceleration path in the clamped mode and the inward bias is released to release the test specimen from the holder assembly.

6. The test apparatus of claim 5 wherein the clamp arms of the holder assembly are biased inwardly via a spring biased locking mechanism.

7. The test apparatus of claim 6 wherein the release mechanism includes a camming assembly to release the spring biased locking mechanism.

8. The test apparatus of claim 7 wherein camming assembly includes a roller on a platform elevated from a landing which forms the second release component and an inclined camming surface coupled to the holder assembly which forms the first release component to release the spring biased locking mechanism.

9. The test apparatus of claim 8 wherein the inclined camming surface is formed on a flange configured to contact the roller to move one or more rods of the locking mechanism against the spring bias to release the test specimen.

10. The test apparatus of claim 3 and comprising a latch mechanism coupled to the platform and the latch mechanism is configured to releasably latch the accelerator component to the platform.

11. A test apparatus comprising:

an accelerator assembly movable along an acceleration path to impart an acceleration to a test specimen coupled to a holder assembly including holder selectively operable between a holding mode and a differently configured release mode;

a release mechanism switching the holder from the holding mode to the release mode to release the test specimen from the holder assembly to a landing while the test specimen is still in motion imparted by the accelerator assembly; and

a roll device imparting a rotational shock to the test specimen following release of the test specimen from the holder assembly.

12. The apparatus of claim 11 wherein the roll device is coupled to the landing of the test apparatus.

13. The test apparatus of claim 11 wherein the accelerator assembly includes an accelerator component movable along the acceleration path under an influence of gravity and comprising at least one end stop device elevated from the landing and configured to restrict movement of the accelerator component beyond the at least one end stop device to the landing.

14. The test apparatus of claim 13 wherein the at least one end stop device is coupled to a platform elevated from the landing and the release mechanism includes a release component on the platform to release the test specimen from the holder assembly to the landing.

15. A method comprising:

securing a test specimen having a shock absorber component to a holder assembly;

accelerating the holder assembly along an acceleration path;

releasing the test specimen from the holder assembly to a landing surface to test shock robustness of the test specimen; and

determining shock robustness of the test specimen and using shock robustness data to design the shock absorber component of the test specimen.

16. The method of claim 15 wherein the test specimen includes a data storage device including at least one rotatable disc and the shock absorber component is enclosed in a casing to limit shock to the data storage device.

17. The method of claim 16 wherein the shock robustness is determined based upon whether an actuator mechanism of the data storage device unlatches and/or the shock absorber component “

bottoms out”

.

18. The method of claim 15 and further comprising:

introducing a rotational shock to the test specimen released from the holder assembly.

19. The method of claim 15 and further comprising:

capturing one or more images of the test specimen following release from the holder assembly.

20. The method of claim 15 and comprising:

detecting the test specimen following release from the holder assembly; and

activating a camera to record one or more images of the test specimen.