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Application domain:
Product test
Challenge:
In the limited budget and the time, designs a set to integrate, multi-purpose, the stable reliable automated test system to use in the communication link test product highly the parameter calibration and the function testing.
Application plan:
Uses NI Corporation based on the LabVIEW hypothesized instrument platform and Agilent Corporation’s 34401A six-and-a-half digital multitester, through connection hardware which and signal recuperation module construction function perfect automated test system has custom-made, integrated digital I/O, the instrument control, the data acquisition, the signal to have and the recuperation function, the union uses the LabVIEW development the test automation software to complete the digital simulation which and the test control, the basic parameter survey and the parameter calibration and various electric circuits module function testing the test assignment needed, realized has tested 4 kind of veneers with a test facility the design requirements, has achieved truly one machine multipurpose, reduced the test cost.
Use product:
LabVIEW7.0, DAQ7.0, DIO-96 DIO card, NI6014 DAQ card, TNT4882C ASIC PCI-GPIB connection card
Introduction
The measuring head as the telephone system subscriber’s loop centralism measurement system’s front end equipment, besides carries on the test to telephone channel’s electrical specification parameter, but may also to the substation, the switchboard user board function carry on the test, measurement system’s backstage analysis software through the analysis returns’s measurement result, carries on the judgment, the localization to the subscriber’s loop breakdown, for accurate, the fast platoon bonds provides the reliable basis, this equipment may through MODEM, the RS-232 mouth or the TCP/IP mouth and the survey center connection. Guangzhou Switzerland reaches company’s measuring head is based on the VME main line’s line test facility,/meets the oral plate, the control/correspondence board, the multi-purpose survey boards by the power source, to survey the board four sub-modules alternately and to have the VME main line passive back board engine case constitution, its nucleus module multi-purpose survey boards by use three end survey law and the zone lines actuation 3-and-a-half digital multitester, the electric capacity reflectoscope reflector, the longitudinal balance reflectoscope reflector as well as the P psophometer are composed, for the guarantee final product’s test precision and the quality, this equipment has established the parameter which and over a thousand in the design ten must calibrate must test the confirmation the parameter, simultaneously its connection module and exterior connectionThe function also needs to confirm one by one, we through use DIO96 simulation CPU and the VME main line’s read-write operation control the test condition which causes by the sketch board it to be in needs; Uses NI6014 the DAQ card to produce 0~1200Hz which, the 0dBm~10dBm tone signal and the standard DTMF signal as well as gathering the test needs was measured that the signal and unifies LabVIEW the signal analysis function to realize to the tone signal frequency and the scope, the test supply oscillator phase difference survey and the DTMF signal decoding; In addition uses GPIB control Agilent Corporation’s 34401A high accuracy avonmeter to complete to each kind of basic parameter survey. Through used the LabVIEW development the test automation software to come the organic conformity above hypothesized instrument resources, the success to construct has satisfied this product 4 blocks the function testings and the parameter automatic calibration automatic test equipment.
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