NASA Langley Research Center, MS 144, Industry Assistance Office Hampton, Va. 23681-0001

66 -- UPGRADE OF FRACTURE WAVE DETECTOR SYSTEM POC NASA Langley Research Center, Industry Assistance Office, Mailstop 144, Hampton, VA 23681-0001. In order that potential sources may learn of the interest in a specific requirement, an advanced notice is published here. Firms are being sought to upgrade the existing Fracture Wave Detector System which detects, digitizes, stores, and analyzes acoustic signals emitted by fracture mechanisms within a structure. The upgrade is to consist of the following hardware and software modifications: 1) Replacement of 4 A/D channels (existing channels have 8 bit vertical resolution and a maximum digitization frequency of 25 MHz) with 8 A/D channels which have a vertical resolution of 12 bits and a digitization rate of at least 60 MHz (single channel mode) or 30 MHz (dual channel mode), 2) Addition of four signal conditioning modules, four B1025 sensors, four PA2040G/A preamplifiers, and an eight slot analog backplane, 3) Replacement of linear and switching power supplies with heavy duty models and the addition of a cooling fan, 4) Replacement of existing 486/66 MHz data processor (ECN 1258617) with an Intel 90 MHz based processor, 5) Upgrade of the hard disk capacity from 240 MByte to 535 MByte with a Fast SCSI-2 type drive, 6) Provide all necessary cabling for 8 channels of data acquisition and full documentation for the upgraded software and hardware, and 7) Software upgrades to allow capture of 8 channels of 12 bit AE data simultaneously with total system throughput to hard disk of over 2 million bits per second while maintaining full functionality of current software system (acquisition module with control of A/D hardware, post-test module which allows viewing and analysis of signals, location module which allows triangulation of signals based on cursor setting, first threshold crossing, or cross correlation techniques for both isotropic and anisotropic materials, materials module which calculates plate wave phase and group velocity dispersion curves for isotropic and anisotropic materials, and database module which allows plotting of measured parameters of AE signals). Firms having the capabilities necessary to meet the above requirement are invited to submit sales literature addressing these capabilities and at least one reference from a previous contract, preferably from a Government agency. (Please provide a contract number, names of cognizant contract personnel, and an applicable telephone number on the contract). This synopsis is for information and planning purposes and is not to be construed as a commitment by the Government nor will the Government pay for information solicited. Respondents will not be notified of the results of the evaluation. Respondents deemed fully qualified will be considered in any resulting solicitation for the requirements. Firms responding should indicate whether they are a socially or economically disadvantaged business firm, 8(a) small business, and/or woman-owned business. The Government reserves the right to consider a small business or 8(a) set- aside based on responses hereto. All responses shall be submitted to the NASA Langley Research Center, Industry Assistance Office, Mail Stop 144, Hampton, VA 23681-0001 within 14 days from the date of publication of this announcement. In responding reference SS231. (0114)

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