Coaxial multi-detection-point detecting rod

A technology of multi-measuring points and test rods, which is applied in the field of precision measurement, can solve the problems that test rods and retractable metal probes cannot solve the multi-point test of the same part, and achieve the effect of eliminating measurement errors and ensuring measurement accuracy

Inactive Publication Date: 2007-03-28
HANGZHOU GOLD ELECTRONICS EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] From the above analysis, we can see that none of the existing test rods and r

Method used

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  • Coaxial multi-detection-point detecting rod
  • Coaxial multi-detection-point detecting rod
  • Coaxial multi-detection-point detecting rod

Examples

Experimental program
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Embodiment Construction

[0027] Referring to FIG. 1 , the coaxial multi-point test rod of the present invention is provided with a telescopic metal probe 5 at the axis of the insulating casing 3 , and a coaxial metal probe 4 is provided around the telescopic metal probe 5 . The signal of the stretchable metal probe 5 is drawn out from the terminal connecting lead 1 , and the signal of the coaxial metal probe is drawn out of the terminal connecting lead 2 . An insulating layer of epoxy resin 18 is provided between the stretchable metal probe 5 and the coaxial metal probe 4 .

[0028] Referring to Figures 2 and 3, the coaxial metal probe 4 is in a tubular shape and is composed of five sequentially connected functional parts. The first functional part is a test end face 11, and the second functional part 10 is a truncated cone-shaped end. The cavity is used for installing the retractable metal probe 5 . The third functional part 9 is in the shape of a round tube, and a positioning notch 12 is formed on ...

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Abstract

The invention discloses one kind coaxial multi-point bar, including insulation shell. Its characteristics of insulation shell are described with extendable metal axis probe, and a coaxial probe around flexible metal probe mentioned at least, the probes are insulating each other. The extendable metal probe and installed coaxial probe of the invention can detect objects together, and realize the two-point measurement and lots -point measurement at the same time. Lead with gauges measuring internal circuit to eliminate the resistance measurement error, and ensure accuracy. Meanwhile, the metal coaxial probe section is large and can be more current. So, it can be applied to solve the limitations of measurement occasions, and can be applied many signal measurements, especially large current signal measurements.

Description

technical field [0001] The invention relates to the field of precision measurement, in particular to a test stick, especially a coaxial multi-point test stick. Background technique [0002] At present, the test rod has been widely used in the instrumentation and testing industry, and it is the most commonly used sampling method for precision measurement of resistance or other electrical signals. Usually, a four-wire system is used for signal transmission at the detection port of the instrument, two of which are used to inject signals, and the other two are used to feed back measurement signals. In this way, two sampling loops are formed in the detection circuit, one of which is used as The compensation circuit is used to eliminate the internal resistance of the measurement line itself and the contact resistance with the measured object. [0003] There are two commonly used measurement methods, one is: each wire is connected to a test rod, the operator holds a pair of inject...

Claims

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Application Information

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IPC IPC(8): G01R1/06G01R1/067G01R1/073G01R27/02G01R27/14
Inventor 徐剑虹吴易坤王永超
Owner HANGZHOU GOLD ELECTRONICS EQUIP CO LTD
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