CN105336459A - AC resistance box of novel structure - Google Patents

AC resistance box of novel structure Download PDF

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Publication number
CN105336459A
CN105336459A CN201510892523.6A CN201510892523A CN105336459A CN 105336459 A CN105336459 A CN 105336459A CN 201510892523 A CN201510892523 A CN 201510892523A CN 105336459 A CN105336459 A CN 105336459A
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CN
China
Prior art keywords
switch
resistance
shielding
resistance box
gear
Prior art date
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Application number
CN201510892523.6A
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Chinese (zh)
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CN105336459B (en
Inventor
方学锋
王震
郑捷
蒋俊培
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HANGZHOU DAHUA INSTRUMENT Manufacturing Co Ltd
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HANGZHOU DAHUA INSTRUMENT Manufacturing Co Ltd
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Priority to CN201510892523.6A priority Critical patent/CN105336459B/en
Publication of CN105336459A publication Critical patent/CN105336459A/en
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Publication of CN105336459B publication Critical patent/CN105336459B/en
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C10/00Adjustable resistors
    • H01C10/50Adjustable resistors structurally combined with switching arrangements

Abstract

The invention discloses an AC resistance box of a novel structure. A resistor element is attached to a high-frequency ceramic plate with a small expansion coefficient through nickel-based precise resistor foil, four ends are led out of resistors prepared through the photoetching technology, and two silver-plated flat purple copper wires are welded to each lead-out end at the same time; a switch is a plane type switch, plane type contact is adopted for the contact point of the switch, the contact material is a silver-plated purple copper plate, and gear positions are evenly distributed on engineering plastic according to requirements; a shaft rod and a rotary knob used for the rotating gear position of the plane type switch are located at the same electric position and also located at the same electric position together with resistors of all the gear positions; a shielding device shields the switch and the whole machine, and during switch shielding, a metal outer cover is arranged outside the switch, and shielding wires are adopted for input and output of a connecting wire. The AC resistance box has the technical advantage that in the multi-gear decimal AC resistance box, it is ensured that resistors at different resistance gears can generate different distribution parameter influence amounts according to the frequency changes and then the influence amounts and mutual influence amounts of the resistors at all gears are eliminated.

Description

A kind of a. c. resistance box of new structure
Technical field
The present invention relates in electromagnetic measurement field and the amount of non-decimal alternating current resistance is passed and corrects, be specially a kind of a. c. resistance box of new structure.
Background technology
Resistance value is one of elementary cell of electricity metering.
Resistor be categorized as D.C. resistance and AC resistance.
Along with scientific technological advance, direct current resistor as ohm value transmission and correct can not meet modern technologies demand.The demand that AC resistance passes as ohm amount, seems more and more important, and national standard and the correction specification of relevant AC resistance device are worked out in succession, list national regulation in.
A. c. resistance box is one of category of AC resistance device, is mainly used in the correction to non-decimal AC resistance value.The range ability of this a. c. resistance box is wide, and therefore its scope of application is quite wide, brings structural design and instructions for use to be different from DC resistance box.Its core technology is when different frequency, due to the impact of distributed capacitance and residual inductance, makes the influence amount that the definite value of alternating current resistance is different along with frequency change brings.The added influence amount eliminating alternating current resistance seems more outstanding, particularly electric power system, space flight and aviation and means of transportation are more outstanding, for the quality evaluation of General Promotion Related product, the non-decimal alternating current resistance that rapid formation is complete, the application of this a. c. resistance box is more outstanding, and namely research and development have the basic point that a. c. resistance box of original technology is this patent.
Summary of the invention
The object of the present invention is to provide a kind of a. c. resistance box of new structure, this a. c. resistance box is in many grades of metric alternating current resistance boxes, guarantee the resistor at different resistance shelves, along with frequency change can produce the influence amount of different distributed parameter, eliminate influence amount and the amount of influencing each other of each shelves resistor.
The technical solution used in the present invention is: a kind of a. c. resistance box of new structure, and the switch of resistive element is housed by several grades, and junction block connects wire, and cabinet, screening arrangement form; It is characterized in that: described resistive element adopts Ni-based precision resistance paper tinsel to paste on the high-frequency ceramic plate that the coefficient of expansion is little, with the resistance that photoetching technique is made, it adopts four ends to draw, and each exit welds two silver-plated flat red copper wires simultaneously, is respectively potential end, current terminal; Described switch is plane switch, and its contact point adopts plane-type contact, and contact material is silver-plated copper plate, and gear is on demand divided equally to have dielectric loss little, on the engineering plastics of good insulation preformance; Its XY switch rotates gear axostylus axostyle used and knob is in same current potential, is in same current potential with the resistance of each shelves simultaneously; Described screening arrangement is that switch shielding and complete machine shield two kinds, and switch is shielding for, outside switch, metal housing is housed, and the constrained input connecting wire all adopts shielded conductor.
Potential end on resistive element exit of the present invention and current terminal, the position of two exits can be equidirectional, also can be in the other direction.
Complete machine shielding of the present invention is that a few gear switch is all in same current potential, namely a few gear switch metal housing is coupled together and is in same current potential, and junction block adopts shielding junction block, and current terminal contact and voltage terminal are in same current potential.
Technique effect of the present invention is: be in many grades of metric alternating current resistance boxes, guarantee the resistor at different resistance shelves, along with frequency change can produce the influence amount of different distributed parameter, eliminates influence amount and the amount of influencing each other of each shelves resistor.
Accompanying drawing explanation
Fig. 1 is the reciprocal schematic diagram of potential end and current terminal position on resistive element exit of the present invention.
Fig. 2 is the equidirectional schematic diagram of potential end and current terminal position on resistive element exit of the present invention.
In the drawings, 1 is resistive element.
Embodiment
Design principle of the present invention is as follows: design about resistive element; Resistive element adopts Ni-based precision resistance paper tinsel to paste on the high-frequency ceramic plate that the coefficient of expansion is little, with the resistance that photoetching technique is made, four ends are adopted to draw, namely each exit welds simultaneously two silver-plated flat red copper wires, be respectively potential end, current terminal, the position of two exits can be equidirectional, also can be in the other direction.This structural resistance device, because resistance value is pasted by metal foil resistor alloy material to produce through photoetching on porcelain plate, so the mechanical stress that resistance device in the fabrication process, is not subject to plastic deformation and is subject to, and resistive conductor is plane, reduce kelvin effect, distributed capacitance, residual inductance, the impact of eddy current is also little, the plastic deformation of porcelain plate is quite little on the impact of paper tinsel metal film, can keep the inherent technology feature of metal foil resistor material.This structural resistance device can meet the requirement of a. c. resistance box.The resistance made of Ni-based precision resistance wire rod sheet material and manganese precision resistance wire rod, sheet material is due to the existence of the intrinsic distributed capacitance of resistance device self and residual inductance, resistor is when designing, must fully compensate stationary distribution capacitance and residual inductance value, to reach optimum state.
About the design of XY switch, switch is one of critical component of a. c. resistance box, switch plays the major function of range swithching in a. c. resistance box, along with the switching of switch position, resistance value also changes thereupon, guarantee the frequency range in regulation, switch any switching laws, its alternating current parameter keeps within the limits prescribed, and switch one of plays a key effect.Switch involved by patent of the present invention is plane switch.Technical characteristic 1, the contact point of switch adopts plane-type contact, and contact material is silver-plated copper plate, and gear is on demand divided equally to have dielectric loss little, on the engineering plastics of good insulation preformance.Distance between this structural requirement conductive plate is equal, and contact resistance is little, and between conduction electroplax and conductive plate, between head and the tail conductive plate, equivalent capacity is mutual definite value, can bear the voltage being not less than 200 volts between conductive plate.Technical characteristic 2; XY switch rotates gear axostylus axostyle used and knob is in same current potential, is in same current potential with the resistance of each shelves simultaneously.
About the shielding measure of a. c. resistance box, a. c. resistance box structurally must have complete shielding, the input of a. c. resistance box, range conversion parts, the positions such as output, inevitably there is distributed capacitance, residual inductance, and kelvin effect, the distributed constant influence amount that eddy current produces, a. c. resistance box is by several many-valued resistance devices, form with tandem type, under same frequency, each gear resistor part all bears different operating voltages, its equivalent capacity is different and cause angular difference also different, make alternating current resistance inconsistent, affect the precision of a. c. resistance box, influence amount is solved by effective screening energy.Technical characteristic 1 switch shields, a. c. resistance box has several switches, each switch is equipped with several resistor elements, and every resistance device bears identical voltage, installs R very little also equal, and the equivalent capacity of each resistance device and switch is equal in theory, in fact still variant, the 1st resistance device and n+1 resistance device variant, for this reason, whole switch is shielded, comprises switched system.Outside switch, metal housing is housed, this outer cover plays electrostatic screen simultaneously, magnetic field shielding.Technical characteristic 2 complete machine shields, and a. c. resistance box is equipped with the switch of resistance device by several grades, and junction block connects wire, and cabinet forms.Shield quite crucial to a. c. resistance box, undesirable shielding, product in use, because operating personnel move in service position, also can produce induced potential, and affect service precision.The shielding of a. c. resistance box complete machine is that a few gear switch is all in same current potential; namely a few gear switch metal housing is coupled together and be in same current potential; Connection Block adopts shielding Connection Block; current terminal contact and voltage terminal are in same current potential; guarantee that casing and structural member are in constant equivalent capacitance value, the variable quantity of the alternating current-direct current resistance caused by angular difference is in minimum steady state value.All shieldings concentrate on a shielding terminal, make a. c. resistance box be on constant current potential, and this shielding terminal is contained on panel.

Claims (3)

1. an a. c. resistance box for new structure, is equipped with the switch of resistive element by several grades, junction block connects wire, and cabinet, screening arrangement form; It is characterized in that: described resistive element adopts Ni-based precision resistance paper tinsel to paste on the high-frequency ceramic plate that the coefficient of expansion is little, with the resistance that photoetching technique is made, it adopts four ends to draw, and each exit welds two silver-plated flat red copper wires simultaneously, is respectively potential end, current terminal; Described switch is plane switch, and its contact point adopts plane-type contact, and contact material is silver-plated copper plate, and gear is on demand divided equally to have dielectric loss little, on the engineering plastics of good insulation preformance; Its XY switch rotates gear axostylus axostyle used and knob is in same current potential, is in same current potential with the resistance of each shelves simultaneously; Described screening arrangement is that switch shielding and complete machine shield two kinds, and switch is shielding for, outside switch, metal housing is housed, and the constrained input connecting wire all adopts shielded conductor.
2. a. c. resistance box of a kind of new structure according to claim 1, is characterized in that: described resistive element exit has potential end and current terminal, and the position of two exits can be equidirectional, also can be in the other direction.
3. a. c. resistance box of a kind of new structure according to claim 1, it is characterized in that: described complete machine shielding is that a few gear switch is all in same current potential, namely a few gear switch metal housing is coupled together and be in same current potential, junction block adopts shielding junction block, and current terminal contact and voltage terminal are in same current potential.
CN201510892523.6A 2015-12-08 2015-12-08 A kind of a. c. resistance box Active CN105336459B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510892523.6A CN105336459B (en) 2015-12-08 2015-12-08 A kind of a. c. resistance box

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CN105336459A true CN105336459A (en) 2016-02-17
CN105336459B CN105336459B (en) 2017-11-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107015060A (en) * 2017-03-20 2017-08-04 西安交通大学 The AC resistance measuring method and system of transmission pressure
CN108387859A (en) * 2018-05-02 2018-08-10 广州赛宝计量检测中心服务有限公司 Measurement and calibration fictitious load, measurement and calibration instrument and the measurement and calibration system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2075379U (en) * 1990-11-02 1991-04-17 天津市无线电五厂科技开发部 Mini-resistor with button switch
US6259351B1 (en) * 1999-10-01 2001-07-10 Pass & Seymour, Inc. Toggle and slide dimmer switch
CN2645187Y (en) * 2003-09-15 2004-09-29 广州赛宝计量检测中心服务有限公司 Precision AC / DC resistance box
CN201804647U (en) * 2010-08-04 2011-04-20 中国人民解放军63680部队 High-voltage and high-resistance resistor box
CN202473455U (en) * 2011-12-14 2012-10-03 内蒙古自治区计量测试研究院 Precision transitional multifunctional resistance box
CN103513210A (en) * 2013-10-11 2014-01-15 内蒙古自治区计量测试研究院 Inductance, capacitance and resistance standard device
CN203982936U (en) * 2014-02-24 2014-12-03 杭州大华仪器制造有限公司 A kind of novel AC resistance device structure
CN104240875A (en) * 2014-09-15 2014-12-24 北京东方计量测试研究所 Bunchy core wire alternating current-direct current difference calculating resistor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2075379U (en) * 1990-11-02 1991-04-17 天津市无线电五厂科技开发部 Mini-resistor with button switch
US6259351B1 (en) * 1999-10-01 2001-07-10 Pass & Seymour, Inc. Toggle and slide dimmer switch
CN2645187Y (en) * 2003-09-15 2004-09-29 广州赛宝计量检测中心服务有限公司 Precision AC / DC resistance box
CN201804647U (en) * 2010-08-04 2011-04-20 中国人民解放军63680部队 High-voltage and high-resistance resistor box
CN202473455U (en) * 2011-12-14 2012-10-03 内蒙古自治区计量测试研究院 Precision transitional multifunctional resistance box
CN103513210A (en) * 2013-10-11 2014-01-15 内蒙古自治区计量测试研究院 Inductance, capacitance and resistance standard device
CN203982936U (en) * 2014-02-24 2014-12-03 杭州大华仪器制造有限公司 A kind of novel AC resistance device structure
CN104240875A (en) * 2014-09-15 2014-12-24 北京东方计量测试研究所 Bunchy core wire alternating current-direct current difference calculating resistor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107015060A (en) * 2017-03-20 2017-08-04 西安交通大学 The AC resistance measuring method and system of transmission pressure
CN107015060B (en) * 2017-03-20 2019-04-23 西安交通大学 The AC resistance measurement method and system of transmission pressure
CN108387859A (en) * 2018-05-02 2018-08-10 广州赛宝计量检测中心服务有限公司 Measurement and calibration fictitious load, measurement and calibration instrument and the measurement and calibration system
CN108387859B (en) * 2018-05-02 2023-11-21 广州赛宝计量检测中心服务有限公司 Analog load for metering calibration, metering calibration instrument and metering calibration system

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Denomination of invention: An AC resistance box

Effective date of registration: 20230327

Granted publication date: 20171103

Pledgee: Zhejiang Fuyang Rural Commercial Bank Co.,Ltd. Dayuan sub branch

Pledgor: HANGZHOU DAHUA APPARATUS MANUFACTURE CO.,LTD.

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