Test passage common and separate calibration method
A technology of testing channels and calibration methods, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of complicated adjustment error operation, time-consuming and labor-intensive, etc., and achieve the effect of improving production efficiency, ensuring accuracy and reducing waste.
Inactive Publication Date: 2009-11-25
SHANGHAI ELECTRIC CABLE RES INST +1
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[0003] The purpose of the present invention is to provide a common and discrete calibration method for test channels. On the basis of using a certain channel as a common channel and performing common calibration on all channels, through the analysis of the test results of standard parts, a certain channel is individually calibrated. Calibration, or common calibration of some similar channels, solves the problem of complex operation, time-consuming and labor-intensive adjustment of traditional calibration methods
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0020] The computer (1) communicates with the test sub-equipment (single-chip microcomputer system) (3) through the serial port (2), and the near-end public channel (7) and the far-end public channel (8) of the test sub-equipment (single-chip microcomputer system) communicate with the The near-end wiring rack relay matrix (4) and the far-end wiring rack relay matrix (5) are connected, and the computer controls (4), (5) through the test sub-equipment control line (6) to connect (7), (8) to Corresponding test port (9).
[0021] A common and discrete calibration method for test channels, comprising the following steps:
[0022] a) Connect the standard part (10) (such as a resistor) to the test channel that will be used as a public calibration channel, such as channel one;
[0023] b) The computer-controlled test sub-equipment commands the near-end and fa...
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The invention relates to a common and separate calibration method for test channels. On the basis of taking a certain channel as a common channel and performing common calibration on all channels, a certain channel is individually calibrated by analyzing the test results of standard parts, or Common calibration of some similar channels solves the problem of complex operation, time-consuming and labor-intensive adjustment of traditional calibration methods. Adopting the test channel common and separate calibration method described in the present invention not only ensures the accuracy of the test data, improves the production efficiency, but also effectively reduces the waste of raw materials.
Description
technical field [0001] The present invention relates to the technical field of a cable testing method, in particular to a common and separate calibration method for test channels Background technique [0002] In the process of cable testing, since there are many pairs of cables, multiple test channels are often required. Cable test equipment switches to different test channels to obtain data through computer analysis of test tasks. However, in the manufacturing process of cable testing equipment, due to the selection of components, manufacturing process and other reasons, there will inevitably be small errors on different test channels for the same standard part. When the test value is large, this error is completely controlled within the test deviation range of the instrument and can be ignored. But when the test value is small, this error will directly affect the accuracy of the test data. In the past, the only way to eliminate errors as much as possible was to constant...
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IPC IPC(8): G01R31/08G01R31/00G01R35/00
Inventor 涂建坤龚江疆
Owner SHANGHAI ELECTRIC CABLE RES INST