Portable deployable automatic test system

• US 5,131,272 A
• Filed: 03/15/1990
• Issued: 07/21/1992
• Est. Priority Date: 03/15/1990
• Status: Expired due to Fees

• Current Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: Russo, Anthony, Dietrich, Jerard, Minei, Anthony J., Franco, John R.
• Primary Examiner(s): Noland, Tom
• Application Number:
  US07/494,235
• Time in Patent Office: 859 Days
• Field of Search: 73/866.1, 73/866.3, 73/865.9, 73/431, 73/1 R, 361/392, 361/393, 361/394, 361/395, 361/396, 324/73.1, 324/158 F, 324/156, 324/74, 324/555, 324/556, 324/557, 324/558, 324/559, 371/15.1
• US Class Current: 73/431
• CPC Class Codes: G01R 31/2834 Automated test systems [ATE]; using microprocessors or computers G01R31/317 takes precedence; ATE for detection of defective computer hardware G06F11/2736

Abstract

A portable automatic test system which is deployable as separate modular elements in a plurality of separate protected transit cases, which after removal of the case covers, are stacked one upon the other to form the final test system. All electrical connections between adjacent modular elements are by zero insertion force connectors or low insertion force connectors positioned between the top and bottom of the adjacent elements. Moreover, the electronic components of each element are readily available through a file drawer design allowing ready access to individual printed circuits boards therein. The system controller also functions in a dual role, serving also as a portable maintenance aid. Moreover, the interconnect elements to the unit under test are passive, removing all active circuitry therefrom, and the passive interconnect elements are designed to fit in two 180 degree displaced positions, thereby minimizing the number of passive interconnect elements required to service the many weapon replaceable assemblies of a particular weapons system.

Claims

1. A portable and deployable automatic test system, comprising a plurality of system modular elements, including a plurality of modular instrument elements, at least one modular switching element, and a modular system controller element, each of which modular elements comprises a modular element housing having a bottom and side housing surfaces, and the top of each modular element housing being closed by a top cover for shipping and deployment which is removed for assembly of the system, said system modular elements being assembled by being stacked one upon the other, and including corresponding and aligned electrical connectors in the top and bottom of adjacent stacked modular elements such that electrical signals are passed between adjacent stacked modular elements by the corresponding connectors which are coupled together by stacking of the adjacent modular elements, eliminating the need for external interconnecting cables.

2. A portable and deployable automatic test system as claimed in claim 1, said corresponding connectors including zero insertion force connectors for medium frequency signals of low current, and low insertion force connectors for high frequency, controlled impedance and high current signals.

3. A portable and deployable automatic test system as claimed in claim 1, said system modular elements comprising first and second switching interface elements, said first switching interface element being for low frequency signals, and said second switching interface element being for radio frequency signals.

4. A portable and deployable automatic test system as claimed in claim 3, said first switching interface element providing switching between general test instruments and a first unit under test, and said second switching interface element providing switching between radio frequency instruments and a unit under test which can be a second unit or the first unit at a later time, and including coaxial and waveguide inputs and outputs.

5. A portable and deployable automatic test system as claimed in claim 1, wherein said system controller element also comprises a portable maintenance aid element which provides portable testing and maintenance functions by itself as a stand-alone element without additional system modular elements.

6. A portable and deployable automatic test system as claimed in claim 1, further including at least one passive interconnection element, having a plurality of input/output connections, stacked upon and coupled to a switch connection element in either one of two 180 degree positions, thereby increasing the number of input/output connections available through said passive interconnection element to support testing of units under test placed thereon.

7. A portable and deployable automatic test system as claimed in claim 6, said passive interconnection element including radio frequency switching, cross-point switching, and digital stimulus and response.

8. A portable and deployable automatic test system as claimed in claim 1, at least one instrument element comprising a front drawer design wherein all of the electronics therein is mounted on a drawer which slides forward on drawer runners relative to the housing of the instrument element, such that the drawer can be opened to allow access to replaceable electronic modules positioned therein.

9. A portable and deployable automatic test system as claimed in claim 1, one instrument element including a calibration module provided for calibration of the electronics in the instrument elements.

10. A portable and deployable automatic test system as claimed in claim 1, said system controller element including an optical disk reader for reading information stored on optical disk cartridges, to eliminate hardcopy documentation and provide an electronic data delivery system.