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Manufacturing method of rotary type decimal fine turning resistance box

A fine-tuning resistor and rotary technology, which is applied in the direction of resistive elements including multiple resistive elements, can solve the problems of discontinuous display value, unbalanced bridge adjustment, and jumping, etc., to achieve improved accuracy and resolution, and improved Measurement accuracy, effect of improving accuracy level

Active Publication Date: 2016-07-20
STATE GRID FUJIAN ELECTRIC POWER CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the resolution (that is, the number of digits) is insufficient, the balance of the bridge cannot be adjusted when verifying the bridge; when the digital thermometer is verified, the displayed value is not continuous and will jump

Method used

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  • Manufacturing method of rotary type decimal fine turning resistance box
  • Manufacturing method of rotary type decimal fine turning resistance box

Examples

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Embodiment 1

[0015] a kind of like figure 1 The rotary decade fine-tuning resistance box shown (hereinafter referred to as the fine-tuning resistance box) includes multiple resistance plates and a fine-tuning resistance plate. The fine-tuning resistance plate includes dynamic and static contact switches K4, standard resistance R S 2, 10 auxiliary resistors R with different resistance N 3. It can also be an improvement on the existing resistance box, which will be described below with the improvement of the standard resistance box ZX25a as an example. The main technical indicators of ZX25a are: it is composed of 6 decimal rotary resistance discs 1 in series, continuously adjustable, the adjustment range is (0.01~1111.11) Ω, the highest accuracy is 2 / 10,000; the accuracy of 2 digits after the decimal point is the error 1% and 5% respectively. The output of the resistance value is connected by the complex moving and static contacts of the rotary switch K, and the contact resistance r will ...

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Abstract

The invention discloses a manufacturing method of a rotary type decimal fine turning resistor box. By utilizing an existing standard resistor box, a high-level panel without the need of adding a measurement panel is modified; the high-level panel is changed into a fine turning resistor panel; in a manufacturing process, all resistor elements of the high-level panel are detached and a standard resistor RS is welded at an input end and an output end of the high-level panel; auxiliary resistors RN which correspond to 10 different resistance values from 0 to 10 are connected into the panel in sequence respectively; after a movable contact and a static contact are connected with the auxiliary resistors RN in series, the movable contact and the static contact are connected with the standard resistor RS in parallel and are finally connected into a general circuit in series. According to the manufacturing method of the rotary type decimal fine turning resistor box, one or more than one accuracy grade of the fine turning resistor box can be improved; the digits of an output value of the resistor box after a decimal point are increased, and ten times of resolution can be improved when one digit is increased; the existing standard resistor box is used for modifying and extra capital investment is not needed.

Description

technical field [0001] The invention relates to a fine-tuning resistance box, in particular to a manufacturing method for a rotary decimal fine-tuning resistance box suitable for a measurement verification electric bridge or a digital thermometer. Background technique [0002] Usually, the output resistance value of each plate of the rotary decade resistance box is composed of a group of series resistance and resistance selection moving and static contacts. The larger the series resistance, the more negligible the contact resistance r of its moving and static contacts, and vice versa. The rotary decade standard resistance box (hereinafter referred to as the resistance box) is composed of a plurality of resistance plates connected in series, and can be used as a standard for a bridge or a digital thermometer. However, due to the contact resistance of the moving and static contacts in the resistance box, the accuracy of the resistance plate with digits below the decimal point...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C10/16
CPCH01C10/16
Inventor 杨泽南郭志斌许素芳吴永慧陆胜华
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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