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Wide band Kelvin double bridge as well as measurement method, autonomous system as well as method and application

A measurement method, double bridge technology, applied in non-electrical signal transmission systems, measuring devices, measuring electrical variables, etc., can solve problems such as troublesome operation, resistance value change, mechanical shock, etc., and achieve good stability

Inactive Publication Date: 2008-06-18
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This approach is not only cumbersome to operate, but the bigger problem is that when switching the "ac and dc difference calculable resistance" and commercial ac standard resistors to several different bridges, it is easy to "ac and dc difference calculable resistance" "Causing mechanical shock, causing changes in its resistance value, affecting the accuracy of the comparison results

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  • Wide band Kelvin double bridge as well as measurement method, autonomous system as well as method and application
  • Wide band Kelvin double bridge as well as measurement method, autonomous system as well as method and application
  • Wide band Kelvin double bridge as well as measurement method, autonomous system as well as method and application

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Embodiment Construction

[0100] 1Ω, 10Ω, 100Ω, 1kΩ, 10kΩ five values ​​of twin-spiral AC and DC difference can calculate the resistance, the specific parameters are shown in Table 1. These five kinds of double-helix type AC and DC difference calculable resistors are used as standards. For the best commercial AC standard resistors available on the market at present, there are five quantities of 1Ω, 10Ω, 100Ω, 1kΩ, and 10kΩ. Compare the Tinsley 5685 commodity AC standard resistors with different values, and determine the AC and DC differences of the Tinsley 5685 commodity AC standard resistors with five values.

[0101] The 1kΩ double helix AC and DC difference calculation resistance is also used as the inner and outer proportional arms of the broadband Kelvin double bridge in the present invention. It can be seen from Table 2 that the performance of the 1kΩ twin-spiral AC and DC difference calculable resistance is very superior, and the uncertainty of the AC and DC difference is still 10 at 100kHz. -7...

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Abstract

The invention discloses a broadband Kelvin double electric bridge and a measurement method thereof, an automatic control system, a method and application thereof. A 1k Omega double-helical type resistance of difference of the alternate-current and direct-current is utilized to be a proportional element for the electric bridge, the electric bridge adopts the total arrangement of the electric bridge with the cross shape, therefore the comparing measurement of the electric bridge is utilized to calculate the resistance with the same nominal resistance in the wide range of direct-current to 100kHz. The electric bridge is utilized to calculate the resistance according to the difference of the double-helical alternate-current and direct-current between the electric bridge and five resistance measurement values of 1 Omega, 10 Omega, 100 Omega, 1k Omega, 10k Omega, the difference of the alternate-current and direct-current of Tinsley5685 type resistance on the five widely applied measurement values of 1 Omega, 10 Omega, 100 Omega, 1k Omega, 10k Omega are measured. The Tinsley5685 type resistance with the five measurement values can be utilized in the calibration of the resistance of the alternate current.

Description

Technical field: [0001] The invention belongs to a measurement standard instrument and its method in the measurement process, in particular to a wide-band Kelvin double bridge, a measurement method, an automatic control system, a method and an application thereof, and is a proportional measuring instrument used as a precision AC resistance comparison . Background technique: [0002] Voltage standards and resistance standards are the two main types of electromagnetic metrology. In principle, as long as there are these two standards, other electromagnetic quantity standards can be derived from these two standards. Therefore, the establishment of stable and high-accuracy voltage standards and resistance standards is the most important content of electromagnetic metrology scientific research projects. [0003] From the second half of the 19th century to the first half of the 20th century, countries established classic resistance standards. The classic resistance standard is s...

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Application Information

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IPC IPC(8): G01R17/14G01R27/02G01R1/18G08C23/04G08C23/06
Inventor 黄璐张钟华李正坤韩冰贺青
Owner NAT INST OF METROLOGY CHINA
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