Browse Prior Art Database

Vibration Test Process for Power Supplies

IP.com Disclosure Number: IPCOM000111570D
Original Publication Date: 1994-Mar-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Basher, CN: AUTHOR [+2]

Abstract

Disclosed is a vibration screening process for testing electronic power supplies during manufacturing. It consists of a dual axis random vibration test station, a four-position quick-release fixture, an air cooling system, and test process control software.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 53% of the total text.

Vibration Test Process for Power Supplies

      Disclosed is a vibration screening process for testing
electronic power supplies during manufacturing.  It consists of a
dual axis random vibration test station, a four-position
quick-release fixture, an air cooling system, and test process
control software.

      To draw out and detect manufacturing defects, a vibration
screening process was designed around five components:

1.  Custom test process control software running on an IBM PS/2
    computer,

2.  Dual axis random vibration test station,

3.  Four position quick-release pneumatic fixture,

4.  Air cooling system for the product under test,

5.  Load box.

      The fixture is designed to hold four units and is pneumatically
actuated allowing for fast load/unload.  The air cooling system is
composed of a fan, air flow monitor, hosing and plenum to which the
units are held by the fixture.

      The process is capable of testing four units at once.  The
process software performs the following functions:

1.    Test equipment control and monitoring,

2.    Product control and monitoring,

3.    Debug Facility.

      Control of the process is achieved through a number of digital
output channels of the computer.  It sequences the activation and
deactivation of the fixture and of the random vibration test station.
AC power is distributed to the units and air cooling system.  A
function generator circuit creates time varying signals which, along
with DC signals, are used to operate the units.  Resistive and
inductive loading is located in the load box for product outputs.

      To ensure that product is...