CN201966016U - Median air standard resistor - Google Patents
Median air standard resistor Download PDFInfo
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- CN201966016U CN201966016U CN2011201130786U CN201120113078U CN201966016U CN 201966016 U CN201966016 U CN 201966016U CN 2011201130786 U CN2011201130786 U CN 2011201130786U CN 201120113078 U CN201120113078 U CN 201120113078U CN 201966016 U CN201966016 U CN 201966016U
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- resistor
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- knobs
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- installing plate
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Abstract
The utility model discloses a median air standard resistor which comprises shell and a panel installed on the shell, wherein the panel is provided with two current wiring knobs and two potential wiring knobs; the center of the panel is connected with a hollow screw rod with the lower end provided with a support plate; the support plate is connected with an upper installing plate above the support plate; the upper installing plate is connected with the lower installing plate through a fixed stand column; at least two main resistors and an adjusting resistor are arranged between the upper installing plate and the lower installing plate; current leads at two ends of each resistor are respectively welded at the same point of the current end in an equalized manner, and are respectively connected with current wiring knobs through leads; the two potential ends are respectively welded with leads with equal length and are connected with respective potential wiring knobs; and the adjusting resistor is connected in series with any main resistor. The median air standard resistor can work in the temperature of 20 plus or minus 10 DEG C and in the humidity RH of 25%-75%, and high-accuracy technique qualification is met. The median air standard resistor is applicable to the metering field of electromagnetic magnitude transmission, high-accuracy instruments, instrument detection and the like.
Description
Technical field
The utility model relates to a kind of standard air resistance, is specifically related to a kind of intermediate value standard air resistance.
Background technology
Standard resistor generally is used for other resistance, or the measurement of strip resistance device, as the reference or the comparison of a standard resistance.Mainly have high-accuracy, the characteristics of low-temperature coefficient.U.S. 742A of FLUKE company and the Canadian Gao Lian 9334A of company standard resistor are in international most advanced level, but it costs an arm and a leg, single the tens thousand of units of resistance, and domestic general user is difficult to accept, and use face is too narrow.At present, domestic precision standard resistance mainly contains models such as BZ3, BZ3C, BZ6, BZ6E, ZY0195, although ratio of precision is higher, guarantees that the environmental condition requirement of precision is also high, need test under the thermostatic oil bath condition in thermostatic chamber.
Summary of the invention
It is 100 Ω-100000 Ω that technical problem to be solved in the utility model provides a kind of resistance, need not the intermediate value standard air resistance of thermostatic oil bath or air groove and adaptation wide temperature range and wide humidity range work.
For solving the problems of the technologies described above, intermediate value standard air resistance of the present utility model, comprise shell and the panel that is installed on this shell, panel is provided with two electric current terminal knobs and two current potential terminal knobs, the central authorities of described panel connect the cored screw that a lower end is provided with supporting plate, supporting plate is connected with the upper mounting plate of its below, and upper mounting plate is connected with lower installation board by anchor post; At least two main resistors and an adjustment resistance are set between described upper mounting plate and lower installation board, be welded to separately current terminal same point the equal equal length of two ends current feed of each main resistor, and be connected with separately electric current terminal knob by lead respectively, two current potential end points weld the lead of equal length respectively and are connected with separately current potential terminal knob; Described adjustment resistance is connected with any one main resistor wherein.
Described main resistor and adjustment resistance are formed by the nichrome wire coiling.
Described upper mounting plate and lower installation board are polyfluortetraethylene plate.
Described anchor post is a brass bar.
Because technique scheme is provided with at least two main resistors between upper mounting plate and lower installation board, the current feed equal length of each main resistor is welded to the current terminal same point, the current potential lead-in wire equal length of each resistance is welded to the potential end same point, thereby effectively offsets thermoelectric potential influence.Adopt multiple process to connect two or more main resistors, make operating current reduction on each main resistor, promptly under the constant situation of total current, the power that each main resistor consumes is less, resistance is less from thermal impact, again by adjusting the meticulous adjustment of resistance, thereby make overall electrical resistance need not under thermostatic oil bath or air groove environment, to carry out precision measurement or calibration, reduce greatly and detect energy consumption.The utility model can work in temperature range (20 ± 10) ℃, humidity range (25%～75%) RH, and keep the high precision technology index.Can be widely used in metering fields such as electromagnetism class transmission of quantity value, high precision instrument, instrument detection.
Description of drawings
Fig. 1 is the internal structure schematic diagram of the utility model intermediate value standard air resistance;
Fig. 2 is an execution mode internal structure left view shown in Figure 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is the electrical schematic diagram of execution mode shown in Figure 1.
Embodiment
By Fig. 1, Fig. 2, Fig. 3 and Fig. 4 as seen, intermediate value standard air resistance of the present utility model, comprise shell 1, panel 2 is installed on the shell 1, panel 1 is provided with two electric current terminal knob C1 and C2 and two current potential terminal knob P1 and P2, and the central authorities of described panel 2 connect the cored screw 4 that a lower end is provided with supporting plate 3, and the mesopore of cored screw 4 is as thermowell, supporting plate 3 is connected with the upper mounting plate 5 of its below, and upper mounting plate 5 is connected with lower installation board 7 by anchor post 6; Upper mounting plate 5 and lower installation board 7 are that volume resistivity is greater than 10
17The polyfluortetraethylene plate of Ω cm also can be the insulation board of other material.Anchor post 6 is a brass bar.Five main resistor R are set between upper mounting plate 5 and the lower installation board 7
1, R
2, R
3, R
4, R
5With an adjustment resistance R
t, main resistor R
1, R
1, R
3, R
4, R
5The equal equal length of two ends current feed be welded to separately current terminal same point, and be connected with C2 with separately electric current terminal knob C1 by lead respectively, two current potential end points P1 and P2 weld the lead of equal length more respectively and are connected with P2 with separately current potential terminal knob P1; Adjust resistance and main resistor R
5Series connection also can be connected with other any one main resistor.
The material of each main resistor and adjustment resistance can not limit, and adopts the nichrome wire coiling to form but be preferably.Its processing technology adopts high low temperature circulation burin-in process technology, makes the fully aging advantages of higher stability that reaches of resistive element, its make precision be better than ± 2 * 10
-4, power is greater than 1W.Adopt full-automatic resistance calibration equipment of RT9606/9607 and high accuracy temperature control watertight aircase, a large amount of main resistors is carried out the measurement of temperature coefficient and resistance, set up database, the employing statistical method is carried out the science pairing and many temperature coefficient of resistance is carried out match, up to overall electrical resistance temperature coefficient theoretical value is zero, will match five main resistor R that get well then
1, R
2, R
3, R
4, R
5Adopt complete balanced method, promptly 5 resistor current lead-in wire equal lengths are welded to the current terminal same point, and current potential lead-in wire equal length is welded to the potential end same point, thereby effectively offsets thermoelectric potential influence.By adopting parallel technology, make operating current on each main resistor only be 1/5th of total current, therefore under the constant situation of total current, the power that each main resistor consumes is less, resistance is less from thermal impact, thereby make overall electrical resistance break away from thermostatic oil bath or air groove, under environment (20 ± 10) ℃ condition, keep the high precision technology index at the scene.Adjust resistance R
tBe concatenated in the middle of any main resistor,, finish the making of the accurate intermediate value standard resistor of the utility model by meticulous adjustment.
The number of main resistor of the present utility model is not limited only to five, but is at least two.With the increase of main resistor number, the influence of resistance self-heating reduces in theory.
Resistance scope of the present utility model is 100 Ω-100000 Ω, and resistance precision elementary error 0.01% guarantees that the elementary error environmental condition is 10 ℃～30 ℃.Can be at wide temperature range (20 ± 10) ℃, work in wide humidity range (25%～75%) RH, and do not need to use thermostatic oil bath or air groove.
Claims (4)
1. intermediate value standard air resistance, comprise shell and the panel that is installed on this shell, panel is provided with two electric current terminal knobs and two current potential terminal knobs, it is characterized in that: the central authorities of described panel (2) connect the cored screw (4) that a lower end is provided with supporting plate (3), supporting plate (3) is connected with the upper mounting plate (5) of its below, and upper mounting plate (5) is connected with lower installation board (7) by anchor post (6); At least two main resistors (R) and an adjustment resistance (R are set between described upper mounting plate (5) and lower installation board (7)
t), be welded to separately current terminal same point the equal equal length of two ends current feed of each main resistor, and be connected with separately electric current terminal knob (C1 and C2) by lead respectively, two current potential end points weld the lead of equal length respectively and are connected with separately current potential terminal knob (P1 and P2); Described adjustment resistance (R
t) connect with any one main resistor (R) wherein.
2. intermediate value standard air resistance according to claim 1 is characterized in that: described main resistor (R) and adjustment resistance (R
t) form by the nichrome wire coiling.
3. intermediate value standard air resistance according to claim 1 is characterized in that: described upper mounting plate (5) and lower installation board (7) are polyfluortetraethylene plate.
4. intermediate value standard air resistance according to claim 1 is characterized in that: described anchor post (6) is a brass bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201130786U CN201966016U (en) | 2011-04-18 | 2011-04-18 | Median air standard resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201130786U CN201966016U (en) | 2011-04-18 | 2011-04-18 | Median air standard resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201966016U true CN201966016U (en) | 2011-09-07 |
Family
ID=44528568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201130786U Expired - Fee Related CN201966016U (en) | 2011-04-18 | 2011-04-18 | Median air standard resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201966016U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743930A (en) * | 2013-12-26 | 2014-04-23 | 中国计量科学研究院 | A set of decimal-system standard resistors and a voltage divider produced by using same |
| 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 |
-
2011
- 2011-04-18 CN CN2011201130786U patent/CN201966016U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743930A (en) * | 2013-12-26 | 2014-04-23 | 中国计量科学研究院 | A set of decimal-system standard resistors and a voltage divider produced by using same |
| CN103743930B (en) * | 2013-12-26 | 2016-09-07 | 中国计量科学研究院 | One group of decimal system measuring resistance and the divider using it to make |
| 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 |
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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: 20110907 Termination date: 20190418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |