CN204257307U - Tandem type Median Normal resistance - Google Patents
Tandem type Median Normal resistance Download PDFInfo
- Publication number
- CN204257307U CN204257307U CN201420794379.3U CN201420794379U CN204257307U CN 204257307 U CN204257307 U CN 204257307U CN 201420794379 U CN201420794379 U CN 201420794379U CN 204257307 U CN204257307 U CN 204257307U
- Authority
- CN
- China
- Prior art keywords
- resistance
- wire
- temperature coefficient
- tandem type
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses tandem type Median Normal resistance, comprise wound packages shell, the panel of shell is fixed with electric current binding post C1 with C2 and electric potential connection post P1 with P2 is connected with the wire-wound resistor R in shell by wire, wire-wound resistor R is composed in series by temperature coefficient contrary coiling resistance R1 and resistance R2, according to the size of temperature coefficient, intercept the Ka Masi of corresponding length, be wound on resistance skeleton respectively, being connected in series point and wire-wound resistor R and porcelain insulation sleeve tie point in the middle of two resistance all adopts silver soldering to connect, effectively being connected by science pairing makes the temperature coefficient α of wire-wound resistor R go to zero, resistance skeleton upper, lower surface respectively and seal layer by tin between shell and completely cut off.Adopt the technical solution of the utility model, tandem type Median Normal resistive performance is reliable, good stability, precision is high, ± 0.005% high precision technology characteristic can be kept in wide temperature range and wide humidity range, high accuracy calibrating and calibration operation can be carried out at the scene, greatly reduce testing cost.
Description
Technical field
The utility model belongs to electronic component, is specifically related to tandem type Median Normal resistance.
Background technology
The resistance of the Median Normal resistance produced both at home and abroad is at present generally at 1 Ω ~ 100000 Ω, mainly single electric resistance structure, temperature coefficient is large, temperature range is narrow, although precision is very high, ensure that the requirement for environmental conditions of precision is very high, when outdoor because the change of the temperature difference cannot ensure the resistance accuracy of resistance, need to measure under thermostatic oil bath or air groove condition in thermostatic chamber, high accuracy calibrating and calibration operation are carried out in the scene of being not easy to.
Summary of the invention
The purpose of this utility model is to provide a kind of resistance to be the Median Normal resistance of 1 Ω ~ 100000 Ω, this resistance stability is good, precision is high, ± 0.005% high precision technology characteristic can be kept in (20 ± 10) DEG C wide temperature range, the wide humidity range of (25% ~ 75%) RH, high accuracy calibrating and calibration operation can be carried out at the scene, thus greatly reduce testing cost.
For achieving the above object, the utility model tandem type Median Normal resistance comprises cylindrical case, the panel of shell is fixed with electric current binding post C1 and C2, electric potential connection post P1 and P2, it is characterized in that: be fixed with resistance skeleton and porcelain insulation sleeve in the enclosure, resistance skeleton is provided with wire-wound resistor R, around resistance skeleton, is surrounded by insulating material; Described wire-wound resistor R is composed in series by the contrary coiling resistance R1 of temperature coefficient and coiling resistance R2, described resistance R1 and R2 is the size according to temperature coefficient, intercept the Ka Masi of corresponding length, be wound on resistance skeleton respectively, the serial connection point in the middle of two resistance adopts silver soldering to connect; Described electric current binding post C1 with C2 and electric potential connection post P1 with P2 adopts silver soldering to be connected by porcelain insulation sleeve with wire-wound resistor R by red copper pigtail lines; The upper and lower end face of described resistance skeleton respectively and seal layer by tin between shell and completely cut off.
Described wire-wound resistor R is composed in series by the coiling resistance R2 of the coiling resistance R1 of positive temperature coefficient and negative temperature coefficient.
Described wire-wound resistor R is composed in series by the coiling resistance R2 of the coiling resistance R1 of negative temperature coefficient and positive temperature coefficient.
Described electric current binding post C1 and C2, electric potential connection post P1 and P2 and conducting strip process by red copper bar, and silver-plated at contact-making surface; It is the pigtail lines be made up of multiply copper wire that electric current, current potential connect wire.
Described porcelain insulation sleeve is that ceramic material is made.
Described shell is that brass is made, and the cylinder outer surface of shell is coated with one deck chromium.
Described resistance skeleton is that brass is made, around resistance skeleton, be surrounded by insulating material.
In technique scheme, be that the resistant series of employing two positive and negative temperatures coefficient makes tandem type Median Normal resistance.System selects the card agate filament winding of positive temperature coefficient or negative temperature coefficient to form R1 resistance on resistance skeleton, match according to science again, adopt the card agate filament winding of negative temperature coefficient or positive temperature coefficient to form R2 resistance on resistance skeleton, be connected in series point and wire-wound resistor R two ends and porcelain insulation sleeve tie point in the middle of two resistance and all adopt silver soldering to connect.The technical solution of the utility model has following beneficial effect: the first, and adopt two resistant series, resistance stability is good, and precision is high; Second, adopt the resistant series pairing of two Positive and Negative Coefficient Temperature, total temperature coefficient α goes to zero, add that resistance wire is that its β value of Ka Masi is very little, thus effectively ensure tandem type Median Normal resistance maintenance ± 0.005% high precision technology characteristic in wide temperature range (20 ± 10) DEG C and wide humidity range (25% ~ 75%) RH; 3rd, adopt fine grinding resistance wire to increase the method for resistance, intense adjustment can be accomplished to R1 and R2, ensure that tandem type Median Normal resistance precision controls within ± 0.005%; 4th, adopt tin to seal layer on resistance skeleton and shell and completely cut off, guarantee that resistance wire and outside air, moisture content completely cut off, guarantee tandem type Median Normal resistance year stability is less than 10ppm, guarantees that resistance is reliable and stable..
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model tandem type Median Normal resistance;
Fig. 2 is the panel construction schematic diagram of the utility model tandem type Median Normal resistance;
Fig. 3 is the circuit theory diagrams of the utility model tandem type Median Normal resistance.
Embodiment
Below in conjunction with drawings and Examples, the utility model tandem type Median Normal resistance is described in further detail.The accompanying drawing forming the application is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.
From Fig. 1, Fig. 2, the tandem type Median Normal resistance of the present embodiment, comprise cylindrical case 1, the panel 5 of shell 1 is fixed with electric current binding post C1 and C2, electric potential connection post P1 and P2, at shell 1 internal fixtion, resistance skeleton 2 and porcelain insulation sleeve 3 are installed, resistance skeleton 2 is provided with wire-wound resistor R, around resistance skeleton 2, is surrounded by insulating material.Wire-wound resistor R is composed in series by the contrary coiling resistance R1 of temperature coefficient and coiling resistance R2, resistance R1 and R2 is the size according to temperature coefficient, intercept the Ka Masi of corresponding length, be wound on resistance skeleton 2 respectively, the serial connection point in the middle of two resistance adopts silver soldering to connect; Electric current binding post C1 with C2 and electric potential connection post P1 with P2 adopts silver soldering to be connected by porcelain insulation sleeve 3 with wire-wound resistor R by red copper pigtail lines.The upper and lower end face of resistance skeleton 2 respectively and seal layer 4 by tin between shell 1 and completely cut off.In the present embodiment, the Ka Masi that wire-wound resistor R intercepts corresponding length according to the size of temperature coefficient respectively by R1 and R2 is successively wound on resistance skeleton 2, in the middle of two resistance, serial connection point adopts silver soldering to connect, wire-wound resistor R two ends and porcelain insulation sleeve silver soldering connect, by red copper pigtail lines from porcelain insulation sleeve difference extracted current, potential end on C1, P1 and C2, P2 binding post.In the present embodiment, shell 1 is that brass is made, and the cylinder outer surface of shell 1 is coated with one deck chromium.Resistance skeleton 2 is that brass is made, and is surrounded by one deck insulating material at the external surface peripheral of resistance skeleton 2.Electric current binding post C1 and C2, electric potential connection post P1 and P2 and conducting strip process by red copper bar, and silver-plated at contact-making surface; It is the pigtail lines be made up of multiply copper wire that electric current, current potential connect wire.Porcelain insulation sleeve 3 is that ceramic material is made.
Fig. 3 is the circuit theory diagrams of the present embodiment tandem type Median Normal resistance.Electricity routing resistance R1 and R2 is composed in series resistance R, and the temperature coefficient of series resistance R should be,
(α 1 is the temperature coefficient of coiling resistance R1, and α 2 is the temperature coefficient of coiling resistance R2).In the present embodiment, by measuring the temperature coefficient of one group of Ka Masi, choose each 1 of the Ka Masi of positive and negative temperature coefficient respectively, its length depends on the size of temperature coefficient α, ensure that series resistance R temperature coefficient α goes to zero, then being taken up in order of priority by the Ka Masi chosen is wound on resistance skeleton, and the middle point and resistance R two ends and porcelain insulation sleeve tie point of being connected in series all adopts silver soldering.In the present embodiment, wire-wound resistor R is composed in series by the coiling resistance R2 of the coiling resistance R1 of positive temperature coefficient and negative temperature coefficient, also can be composed in series by the coiling resistance R2 of the coiling resistance R1 of negative temperature coefficient and positive temperature coefficient.
In the present embodiment, by the measurement to naked resistance R value and temperature coefficient, while temperature coefficient α goes to zero, the precision of controlling resistance R is within ± 0.005%, adopts fine grinding resistance wire to increase the method for resistance, reach the object of intense adjustment, the resistance wire part of fine grinding adopts insulation processing.
In the present embodiment, by to after the measurement of naked resistance R and intense adjustment, the upper and lower end face of resistance skeleton 2 is closely sealed with resistance shell respectively and adopt tin to seal layer 4 to completely cut off, guarantee that resistance wire and outside air, moisture content completely cut off, thus the year stability of guarantee resistance is less than 10ppm.Adopt the technical scheme of the present embodiment, resistance precision is very high, its precision can be controlled in ± 0.005% within, because temperature coefficient α, β of resistance R are very little, tandem type Median Normal resistance can keep ± 0.005% high precision technology characteristic at wide temperature range (20 ± 10) DEG C with wide humidity range (25% ~ 75%) RH, and high accuracy calibrating and calibration operation are carried out in the scene of being convenient to.Tandem type Median Normal resistance in the present embodiment is widely used in electromagnetism class transmission of quantity value, the metering fields such as instrument and meter detection.
The above; it is only embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent method change, all still belong in the protection range of technical solutions of the utility model.
Claims (7)
1. a tandem type Median Normal resistance, comprise cylindrical case (1), the panel (5) of shell (1) is fixed with electric current binding post C1 and C2, electric potential connection post P1 and P2, it is characterized in that: be provided with resistance skeleton (2) and porcelain insulation sleeve (3) at shell (1) internal fixtion, resistance skeleton (2) is provided with wire-wound resistor R, around resistance skeleton (2), is surrounded by insulating material; Described wire-wound resistor R is composed in series by the contrary coiling resistance R1 of temperature coefficient and coiling resistance R2, described resistance R1 and R2 is the size according to temperature coefficient, intercept the Ka Masi of corresponding length, be wound on resistance skeleton (2) respectively, the serial connection point in the middle of two resistance adopts silver soldering to connect; Described electric current binding post C1 with C2 and electric potential connection post P1 with P2 adopts silver soldering to be connected by porcelain insulation sleeve (3) with wire-wound resistor R by red copper pigtail lines; The upper and lower end face of described resistance skeleton (2) seals layer (4) by tin respectively and between shell (1) and completely cuts off.
2. a kind of tandem type Median Normal resistance according to claim 1, is characterized in that: described wire-wound resistor R is composed in series by the coiling resistance R2 of the coiling resistance R1 of positive temperature coefficient and negative temperature coefficient.
3. a kind of tandem type Median Normal resistance according to claim 1, is characterized in that: described wire-wound resistor R is composed in series by the coiling resistance R2 of the coiling resistance R1 of negative temperature coefficient and positive temperature coefficient.
4. a kind of tandem type Median Normal resistance according to claim 1, is characterized in that: described electric current binding post C1 and C2, electric potential connection post P1 and P2 and conducting strip process by red copper bar, and silver-plated at contact-making surface; It is the pigtail lines be made up of multiply copper wire that electric current, current potential connect wire.
5. a kind of tandem type Median Normal resistance according to claim 1, is characterized in that: described porcelain insulation sleeve (3) is that ceramic material is made.
6. a kind of tandem type Median Normal resistance according to claim 1, it is characterized in that: described shell (1) is that brass is made, the cylinder outer surface of shell (1) is coated with one deck chromium.
7. a kind of tandem type Median Normal resistance according to claim 1, is characterized in that: described resistance skeleton (2) is that brass is made, around resistance skeleton (2), be surrounded by insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420794379.3U CN204257307U (en) | 2014-12-15 | 2014-12-15 | Tandem type Median Normal resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420794379.3U CN204257307U (en) | 2014-12-15 | 2014-12-15 | Tandem type Median Normal resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204257307U true CN204257307U (en) | 2015-04-08 |
Family
ID=52961589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420794379.3U Expired - Fee Related CN204257307U (en) | 2014-12-15 | 2014-12-15 | Tandem type Median Normal resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204257307U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485187A (en) * | 2014-12-15 | 2015-04-01 | 安庆市计量测试所 | Series-connected medium-value standard resistor |
| CN112285396A (en) * | 2020-10-29 | 2021-01-29 | 北京东方计量测试研究所 | Super-stable standard resistor |
-
2014
- 2014-12-15 CN CN201420794379.3U patent/CN204257307U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485187A (en) * | 2014-12-15 | 2015-04-01 | 安庆市计量测试所 | Series-connected medium-value standard resistor |
| CN112285396A (en) * | 2020-10-29 | 2021-01-29 | 北京东方计量测试研究所 | Super-stable standard resistor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204269746U (en) | A kind of MOA lightning arrester on-Line Monitor Device | |
| CN204257307U (en) | Tandem type Median Normal resistance | |
| CN203798883U (en) | Micro-current high-precision resistor type voltage dividing device | |
| CN106782949A (en) | A kind of wire wrap nickel current sensing element and preparation method | |
| KR20150000821A (en) | Mtehod of electrically conductive connection of two superconducting cables | |
| CN205192648U (en) | A temperature sensor for electric oven | |
| CN108710016B (en) | A kind of calculation method of the single-core cable distributed electrical capacitance current containing the golden cloth that insulate | |
| CN104485187A (en) | Series-connected medium-value standard resistor | |
| CN205862505U (en) | A kind of many detection circuits line-type heat detector based on thermistor element in parallel | |
| CN201966016U (en) | Median air standard resistor | |
| CN102254664B (en) | Low-resistance air standard resistor | |
| CN203324357U (en) | Electronic voltage transformer used for detecting high voltage resistor current | |
| CN105066865A (en) | Ablative thickness sensor using membrane technology | |
| CN204347108U (en) | Based on Luo-coil type current transformer wide region measurement control circuit | |
| CN202166483U (en) | NTC temperature sensor | |
| CN203643046U (en) | Highly sensitive temperature sensor for soya-bean milk machine | |
| CN210894456U (en) | Improved electric energy meter wiring terminal | |
| CN106953311A (en) | A kind of Current Transformer Secondary overvoltage protection device | |
| CN207967384U (en) | A kind of thread guide devices that heat control system pad temperature measures | |
| CN204289911U (en) | High frequency junction block | |
| CN202025588U (en) | Low-value air standard resistor | |
| CN102889943A (en) | NTC (Negative Temperature Coefficient) temperature sensor | |
| CN205539200U (en) | Cable conductor shields resistance measurement device | |
| CN202600002U (en) | High resistance ohm standard and resistor connector | |
| CN203191105U (en) | Standard platinum resistance thermometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20191215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |