CN102254664B - Low-resistance air standard resistor - Google Patents
Low-resistance air standard resistor Download PDFInfo
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- CN102254664B CN102254664B CN 201110096045 CN201110096045A CN102254664B CN 102254664 B CN102254664 B CN 102254664B CN 201110096045 CN201110096045 CN 201110096045 CN 201110096045 A CN201110096045 A CN 201110096045A CN 102254664 B CN102254664 B CN 102254664B
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- air standard
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Abstract
The invention discloses a low-resistance air standard resistor. The low-resistance air standard resistor comprises a tube-shaped housing, a current binding post C1 and a current binding post C2, a potential binding post P1 and a potential binding post P2, wherein the current binding post C1 and the current binding post C2 are fixed on a panel of the housing, the potential binding post P1 and the potential binding post P2 are connected with electric circuit in the housing through conductors with the same length. The electric circuit comprises an adjusting resistor RT, more than two main resistors and a plurality of balancing resistors, both ends of the adjusting resistor RT and both ends of each main resistor are connected with the current binding post C1 and the current binding post C2 in parallel through the conductors with the same length. Each main resistor is respectively connected with the two balancing resistors in series through the conductors with the same length, and then is respectively connected with the potential binding post P1 and the potential binding post P2 in parallel through the conductors with the same length. According to the technical scheme provided with the present invention, the low-resistance air standard resistor has characteristics of reliable performance, low cost, high test precision, and can work in a wide temperature range and a wide humidity range, and can perform a precise test or a precise calibration without under the environment of constant temperature oil groove or under the environment of air tank so as to substantially reduce detection energy consumption. In addition, the low-resistance air standard resistor can be widely applicable for the metric fields such as electromagnetic magnitude transmitting, high-precision apparatuses, instrumentation detecting and the like.
Description
(1), technical field:
The invention belongs to electronic component, be specifically related to low-resistance air standard resistor.
(2), background technology:
The U.S. 742A of FLUKE company and the Canadian Gao Lian 9334A of company low-resistance air standard resistor are in international most advanced level at present, but it is expensive, single the tens thousand of units of resistance, and domestic general user is difficult to accept, and use face is too narrow.Be representative: BZ3, BZ3C, BZ6, BZ6E, ZY0195 etc. and domestic low-resistance air standard resistor mainly contains following several model, although ratio of precision is higher, but the requirement for environmental conditions that guarantees precision is also high, need in thermostatic chamber, test under the thermostatic oil bath condition, can only under the environment in laboratory, test, and can not carry out on-the-spot test in enterprise according to actual conditions, and test very inconveniently, and testing cost is high.
(3), content of the present invention:
The object of the present invention is to provide low-resistance air standard resistor, this resistive performance is reliable, cost is low, measuring accuracy is high, can work in the wide temperature range of (20 ± 10) ℃, the wide humidity range of (25%～75%) RH, can test at the enterprise scene, and need not to carry out precision measurement or calibration under thermostatic oil bath or the air groove environment, test very convenient, thereby greatly reduce the detection energy consumption.
For achieving the above object, low-resistance air standard resistor of the present invention comprises cylindrical case, be fixed with electric current binding post C1 and C2 on the surface of panel, electric potential connection post P1 and P2, be fixed with circuit in the shell, it is characterized in that: described electric current binding post C1 and C2 and electric potential connection post P1 and P2 are fixed on the surface of shell by fixed panel, and the interior circuit of the wire by equal length and shell is connected, be fixed with the mounting panel sub-assembly in the shell, the upper mounted plate that the mounting panel sub-assembly is made by insulating material and bottom plate and anchor post form, fix by anchor post between upper mounted plate and the bottom plate, be fixed with several conducting strips at upper mounted plate and bottom plate; Described circuit is connected by wire by conducting strip, formed by adjusting resistance Rt and two above main resistors and many balance resistances, the two ends of adjusting resistance Rt and every main resistor by equal length wire and be connected on electric current binding post C1 and the C2, every main resistor respectively with the wire by equal length and being connected on electric potential connection post P1 and the P2 again after two balance resistances are connected by the wire of equal length.
Described every main resistor adopts manganin filament winding system.
The precision of described every balance resistance is better than ± and 2 * 10
-4Ω.
The symmetrical series connection of described two balance resistances is at the two ends of every main resistor.
Described fixed panel is to adopt the die casting of P2301 phenol-formaldehyde resin powder to form, and its volume resistivity is greater than 10
15Ω cm; Upper mounted plate and bottom plate all are greater than 10 by resistivity
17The polytetrafluoroethylmaterial material of Ω cm is made, and anchor post adopts brass bar to be processed into.
Described shell is to adopt brass band to be stamped to form, and wire is to be made by the red copper material.
To adopt the balance resistance multiple process to make low-resistance air standard resistor in technique scheme, the two ends of namely adopting many main resistors by equal length wire and be connected on electric current binding post C1 and the C2, every main resistor respectively the balance resistance identical or close with two resistances by the wire series connection of equal length after the wire by equal length and being connected on electric potential connection post P1 and the P2 again, the precision of balance resistance is better than ± 2 * 10
-4, its resistance is main resistor 100-1000 times.By adopting the balance resistance parallel technology, make operating current on each main resistor only be 1/4th of total current, therefore in the constant situation of total current, the power that each main resistor consumes is less, resistance is less from thermal impact, thereby can make low-resistance air standard resistor break away from thermostatic oil bath or air groove in when test, the temperature of environment under the condition of (25%～75%) RH, keeps the high precision technology index in (20 ± 10) ℃ and temperature at the scene.Also receive on electric current binding post C1 and the C2 at the two ends of adjusting resistance Rt, can carry out intense adjustment to this low-resistance air standard resistor.Adopt technical scheme of the present invention, precision is very high, and the error of low-resistance air standard resistor can be controlled in 0.01%, and its Standard resistance range is wide, and its price only is external with 1/10th of quasi-resistance, tests very conveniently, greatly reduces the detection energy consumption.
(4), description of drawings:
Fig. 1 is the surface structure schematic diagram of low-resistance air standard resistor of the present invention;
Fig. 2 is the internal structure schematic diagram of low-resistance air standard resistor of the present invention;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the circuit theory diagrams of low-resistance air standard resistor of the present invention.
(5), embodiment:
Below in conjunction with accompanying drawing low-resistance air standard resistor of the present invention is described in further detail.
By Fig. 1, Fig. 2, Fig. 3 as seen, the low-resistance air standard resistor of present embodiment, comprise cylindrical case 1, panel at shell 1 is fixed with electric current binding post C1 and C2, electric potential connection post P1 and P2, be fixed with circuit in the shell 1, electric current binding post C1 and C2 and electric potential connection post P1 and P2 are fixed on the surface of shell 1 by fixed panel 2, and the wire by equal length and shell 1 interior circuit is connected, be fixed with the mounting panel sub-assembly in the shell 1, the upper mounted plate 3 that the mounting panel sub-assembly is made by insulating material and bottom plate 4 and anchor post 5 form, fixing by anchor post 5 between upper mounted plate 3 and the bottom plate 4, be fixed with several conducting strips 6 at upper mounted plate 3 and bottom plate 4; Each electronic component is connected by wire by conducting strip 6 in the circuit in the shell 1.In the present embodiment, shell 1 is that to adopt brass band to be stamped to form cylindric, conducting strip 6 and to be connected wire be by the making of red copper material, and fixed panel 2 is that the die casting of employing P2301 phenol-formaldehyde resin powder forms, its volume resistivity is greater than 10
15Ω cm; Upper mounted plate 3 and bottom plate 4 all are greater than 10 by resistivity
17The polytetrafluoroethylmaterial material of Ω cm is made, and anchor post 5 is to adopt brass bar to be processed into.
Fig. 4 is the circuit theory diagrams of present embodiment low-resistance air standard resistor.As seen from Figure 4, circuit is by adjusting resistance Rt and four main resistor R1 that resistance is identical or close, R2, R3, the balance resistance r11 that R4 and resistance are identical or close, r12, r21, r22, r31, r32, r41, r42 forms, adjusting resistance Rt and four main resistor R1, R2, R3, the two ends of R4 by equal length wire and be connected on electric current binding post C1 and the C2, every main resistor respectively the balance resistance identical or close with two resistances by the wire series connection of equal length after the wire by equal length and being connected on electric potential connection post P1 and the P2 again, be the identical or close balance resistance r11 of resistance, r12 is symmetrical, and series connection is being connected on behind the two ends of main resistor R1 on electric potential connection post P1 and the P2 again, the balance resistance r21 that resistance is identical or close, r22 is symmetrical, and series connection is being connected on behind the two ends of main resistor R2 on electric potential connection post P1 and the P2 again, the balance resistance r31 that resistance is identical or close, r32 is symmetrical, and series connection is being connected on electric potential connection post P1 and the P2 balance resistance r41 that resistance is identical or close again behind the two ends of main resistor R3, r42 is symmetrical, and series connection is being connected on electric potential connection post P1 and the P2 behind the two ends of main resistor R4 again.In the present embodiment, main resistor R1, R2, R3, R4 all adopt manganin filament winding system; The precision of balance resistance r11, r12, r21, r22, r31, r32, r41, r42 all is better than ± and 2 * 10
-4Ω.
In the present embodiment, the current feed equal length at 4 main resistor R1, R2, R3, R4 two ends that adopts in parallel is welded to the same point of current terminal C1 and C2, and electric potential connection end P1 and P2 among seal in precision and be better than ± and 2 * 10
-4Balance resistance, the resistance of balance resistance be main resistor resistance 100-1000 doubly, equal length is welded to the same point of potential end again.By adopting the balance resistance parallel technology, make operating current on each main resistor only be 1/4th of total current, therefore in the constant situation of total current, the power that each main resistor consumes is less, resistance is less from thermal impact, thereby can make low-resistance air standard resistor break away from thermostatic oil bath or air groove in when test, the temperature of environment under the condition of (25%～75%) RH, keeps the high precision technology index in (20 ± 10) ℃ and humidity at the scene.Also receive on electric current binding post C1 and the C2 at the two ends of adjusting resistance Rt, can carry out intense adjustment to this low-resistance air standard resistor.Adopt technical scheme of the present invention, precision is very high, and the error of low-resistance air standard resistor can be controlled in 0.01%, and its Standard resistance range is wide, and its price only is external with 1/10th of quasi-resistance, tests very conveniently, greatly reduces the detection energy consumption.The low-resistance air standard resistor of present embodiment is widely used in the metering fields such as electromagnetism class transmission of quantity value, high precision instrument, instrument detection.
Present embodiment is when practical set, when the low value low-resistance air standard resistors such as making 0.001 Ω, 0.01 Ω, 0.1 Ω, 1 Ω, 10 Ω, every main resistor adopts manganin filament winding system, it is 0.004 Ω, 0.04 Ω, 0.4 Ω, 4 Ω, 40 Ω that every main resistor adopts respectively resistance, and it is 1 Ω, 10 Ω, 100 Ω, 1k Ω, 10k Ω that every balance resistance adopts respectively respective resistance values.When the low-resistance air standard resistor of different resistances according to actual needs, need to select main resistor and the balance resistance of respective resistance values.In addition, also need a large amount of main resistors is carried out the measurement of temperature coefficient and resistance, building database, the employing statistical method is carried out the science pairing and many main resistor temperatures coefficient is carried out match, until overall electrical resistance temperature coefficient theoretical value is zero.
Claims (5)
1. low-resistance air standard resistor, comprise cylindrical case (1), fixed panel at shell (1) is fixed with electric current binding post C1 and C2, electric potential connection post P1 and P2, shell is fixed with circuit in (1), it is characterized in that: described electric current binding post C1 and C2 and electric potential connection post P1 and P2 are fixed on the surface of shell (1) by fixed panel (2), and the interior circuit of the wire by equal length and shell (1) is connected, shell is fixed with the mounting panel sub-assembly in (1), the mounting panel sub-assembly is comprised of upper mounted plate (3) and bottom plate (4) and anchor post (5), upper mounted plate (3) and bottom plate (4) are to be made by insulating material, fixing by anchor post (5) between upper mounted plate (3) and the bottom plate (4), be fixed with several conducting strips (6) at upper mounted plate (3) and bottom plate (4); Described circuit is connected by wire by conducting strip (6), main resistor and many balance resistances by adjusting resistance Rt and two to four form, the two ends of adjusting resistance Rt and every main resistor by equal length wire and be connected on electric current binding post C1 and the C2, every main resistor respectively with the wire by equal length and being connected on electric potential connection post P1 and the P2 again after two balance resistances are connected by the wire of equal length; The resistance of described every main resistor is identical or close, and the resistance of every balance resistance is identical or close, the resistance of every balance resistance be every main resistor resistance 100-1000 doubly, the precision of every balance resistance is better than ± 2 * 10
-4Ω.
2. a kind of low-resistance air standard resistor according to claim 1 is characterized in that: described every main resistor employing manganin filament winding system.
3. a kind of low-resistance air standard resistor according to claim 1 is characterized in that: the symmetrical series connection of described two balance resistances is at the two ends of every main resistor.
4. a kind of low-resistance air standard resistor according to claim 1 is characterized in that: described fixed panel (2) is to adopt the P2301 phenolic resin material to process, and its volume resistivity is greater than 10
15Ω cm; Upper mounted plate (3) and bottom plate (4) all are greater than 10 by resistivity
17The polytetrafluoroethylmaterial material of Ω cm is made, and anchor post (5) is to adopt brass bar to be processed into.
5. a kind of low-resistance air standard resistor according to claim 1 is characterized in that: described shell (1) is to adopt brass band to be stamped to form, and conducting strip (6) and wire are to be made by the red copper material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110096045 CN102254664B (en) | 2011-04-18 | 2011-04-18 | Low-resistance air standard resistor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110096045 CN102254664B (en) | 2011-04-18 | 2011-04-18 | Low-resistance air standard resistor |
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| CN102254664A CN102254664A (en) | 2011-11-23 |
| CN102254664B true CN102254664B (en) | 2013-01-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104485187A (en) * | 2014-12-15 | 2015-04-01 | 安庆市计量测试所 | Series-connected medium-value standard resistor |
| CN105390220A (en) * | 2015-12-08 | 2016-03-09 | 杭州大华仪器制造有限公司 | Alternating-current resistor structure |
| CN105866718A (en) * | 2016-03-28 | 2016-08-17 | 杭州大华仪器制造有限公司 | Novel AC/DC shunt |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201319284Y (en) * | 2008-10-22 | 2009-09-30 | 中国兵器工业集团第五三研究所 | Standard resistor |
| CN202025588U (en) * | 2011-04-18 | 2011-11-02 | 安庆市计量测试所 | Low-value air standard resistor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201319284Y (en) * | 2008-10-22 | 2009-09-30 | 中国兵器工业集团第五三研究所 | Standard resistor |
| CN202025588U (en) * | 2011-04-18 | 2011-11-02 | 安庆市计量测试所 | Low-value air standard resistor |
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