CN201666947U - Adjustable high-stability constant voltage device - Google Patents
Adjustable high-stability constant voltage device Download PDFInfo
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- CN201666947U CN201666947U CN2010201254375U CN201020125437U CN201666947U CN 201666947 U CN201666947 U CN 201666947U CN 2010201254375 U CN2010201254375 U CN 2010201254375U CN 201020125437 U CN201020125437 U CN 201020125437U CN 201666947 U CN201666947 U CN 201666947U
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Abstract
The utility model provides an adjustable high-stability constant voltage device. The utility model is characterized in that the adjustable high-stability constant voltage device comprises a storage battery, a DC converter and a voltage adjuster, wherein the storage battery supplies the stable DC voltage source; the input end of the DC converter is connected with the storage battery for converting the voltage of the DC voltage source into the required DC voltage; the adjusting end of the DC converter is connected with a first potentiometer for adjusting the DC voltage further; the input end of the voltage adjuster is connected with the output end of the DC converter; and the output end of the voltage adjuster is an adjustable port. The adjustable high-stability constant voltage device has high adjusting fineness that can be 0.01muV and high accuracy of +/-0.01% and realizes the metrological verification for a high-accuracy DC millvoltmeter.
Description
Technical field
The utility model relates to a kind of high precision direct current milivoltmeter metering and calibrating device.
Background technology
Along with science and technology development, integrated, the modular high-acruracy survey control instrument of function is used widely in automated system day by day.For example RKC-10A type DC resistance of inductive winding is surveyed instrument soon, has used two MMS-A19A type milivoltmeters of being produced by Taiwan Electronic Instruments Plant to carry out voltage and current measurement, and its sensing range is respectively DC0～999.99mV, DC0～999.99mV.Because the accuracy class of these two Displaying Meters is very high, it to be carried out in the gauging calibration process, when utilizing conventional source of stable pressure to carry out verification, low voltage shows easily fluctuation, anti-interference is poor, can't meet the demands at all.According to the market study result, need be very expensive to the required high precision standard device of the calibrating of such instrument from external import and price.
The utility model content
The technical problems to be solved in the utility model is: a kind of adjustable high stability constant-voltage equipment is provided, realizes the measurement verification of high precision direct current milivoltmeter.
The utility model is to solve the problems of the technologies described above the technical scheme of being taked to be: a kind of adjustable high stability constant-voltage equipment, and it is characterized in that: it comprises:
Accumulator provides the galvanic current potential source;
DC converter, its input end and accumulator link, and the voltage transformation of direct voltage source is become needed DC voltage; The adjustable side and first potentiometer link, and DC voltage is done further to adjust;
Voltage adjuster, the output terminal of input end and DC converter links, and output terminal is adjustable port.
Comprise the roughly adjusted rheostat of mutual series connection, middle accent slide-changing resistor and fine setting slide-changing resistor by the described voltage adjuster of such scheme; Wherein roughly adjusted rheostat is the fixed value resistance of a plurality of equal resistances of series connection, all exports one between adjacent fixed value resistance and selects shelves; The output terminal of described voltage adjuster is two measurement terminal, the sliding end of one of them measurement terminal and middle accent slide-changing resistor links, one of selection shelves between another measurement terminal and fixed value resistance connect, and can regulate between the shelves selecting, and constitute adjustable port.
Press such scheme, it also comprises battery charging circuit, and input end and external power supply link, and output terminal and accumulator are in parallel.
Press such scheme, described DC converter input end also is parallel with light emitting diode, and output terminal is parallel with light emitting diode, resistance, voltage stabilizing diode and electric capacity of voltage regulation.
Principle of work of the present utility model is: after the working power dc-battery inserts, DC converter receives direct current signal, pass through voltage transformation then, be transformed into the output of small voltage direct current signal, the small voltage direct current signal of output is by the roughly adjusted rheostat of voltage adjuster, the middle slide-changing resistor of transferring, corresponding small voltage output is exported in the adjusting of fine setting slide-changing resistor.When the adjusting fineness of voltage adjuster can not meet the demands, first potentiometer on the scalable DC converter met the demands output.
The beneficial effects of the utility model are: 1, regulate the fineness height, reach 0.01uV; 2, accuracy rate height, reach ± 0.01%; 3, realize the measurement verification of high precision direct current milivoltmeter; 4, utilize testing laboratory's conventional equipment, cost is low.
Description of drawings
Fig. 1 is the block diagram of an embodiment of the utility model
Fig. 2 is the circuit theory diagrams of an embodiment of the utility model
Embodiment
Fig. 1 is the block diagram of an embodiment of the utility model, and present embodiment comprises: accumulator provides the galvanic current potential source; DC converter, its input end and accumulator link, and the voltage transformation of direct voltage source is become needed DC voltage; The adjustable side and the first potentiometer W1 link, and DC voltage is done further to adjust; Voltage adjuster, the output terminal of input end and DC converter links, and output terminal is adjustable port.
As another preferred version, present embodiment also comprises battery charging circuit, and input end and external power supply link, and output terminal and accumulator are in parallel, and Fig. 2 is the circuit theory diagrams of an embodiment of the utility model.
The battery charging circuit part: the outer attached charger of present embodiment, by charging socket to charge in batteries.1.5A fuse F1 one termination is gone into "+" jack of charging socket, the other end links to each other with No. 6 terminals of charging/measurement selector switch K2."-" jack of charging socket links to each other with the a3 terminal of power switch K1, negative pole, the DC converter power input negative pole of 24V power light (being light emitting diode) XD1 respectively.The positive pole of 24V accumulator connects the a1 terminal of power switch K1, and negative pole connects the a2 terminal of power switch K1.The negative pole of 24V cell voltage indicating gauge V1 connects the a3 terminal of power switch K1, and positive pole connects the a4 terminal of power switch K1.Battery charging/discharging electric current indicating gauge A1 positive pole connects No. 5 terminals of charging/measurement selector switch K2, and negative pole links to each other with No. 2 terminals of charging/measurement selector switch K2.The a4 terminal of power switch K1 respectively with No. 3, No. 4 terminal short circuits of charging/measurement selector switch K2.2.5A the end of fuse F2 links to each other with No. 1 terminal of charging/measurement selector switch K2, the other end links to each other with positive pole, the DC converter power input positive pole of 24V power light XD1 respectively.
The DC converter part: link to each other with the ADJ terminal of DC converter ZLBH behind the W1-1 of the first potentiometer W1, the W1-2 terminal short circuit, the first potentiometer W1-3 terminal links to each other with another ADJ terminal of DC converter.The positive pole of DC converter output terminal links to each other with an end of resistance R, the negative electrode of voltage stabilizing diode D, the positive pole of 6V power supply voltage stabilizing pilot lamp (being light emitting diode) XD2, the positive pole of electric capacity of voltage regulation C respectively; The DC converter negative pole of output end links to each other with the other end of resistance R, the anode of voltage stabilizing diode D, the negative pole of 6V power supply voltage stabilizing pilot lamp XD2, the negative pole of electric capacity of voltage regulation C respectively.
The voltage adjuster part: voltage adjuster RXY comprises the roughly adjusted rheostat of mutual series connection, middle accent slide-changing resistor and fine setting slide-changing resistor, and output terminal is two measurement terminal C1 and C2; Wherein roughly adjusted rheostat is the fixed value resistance R1 to R22 of a plurality of equal resistances of series connection, all exports one between adjacent fixed value resistance and selects shelves; The other end of R1 and DC converter output head anode link, transfer the W2-1 end of resistance W2 in another termination of R22, the W3-1 end of middle accent resistance W2-3 end and semifixed resistor W3 and W3-2 hold and link, and the W3-3 of semifixed resistor W3 holds with the DC converter negative pole of output end and links; The middle W2-2 end of resistance W2 of transferring is connected to measurement terminal C2, and one of selection shelves between fixed value resistance are connected to measurement terminal C1, and C1 is adjusting in selecting shelves.
Before using present embodiment to carry out instrument calibration, earlier measurement terminal C1 and C2 and 7081 precision digital voltage tables are linked, regulating measurement terminal C1 connects with selecting shelves, and transfer the W2-2 end of resistance W2, the W3-2 end of semifixed resistor W3 and the W1-2 of the first potentiometer W1 to hold in regulating, make the output voltage of present embodiment meet the requirement of waiting to examine and determine instrument, then measurement terminal C1 and C2 end are linked with instrument to be examined and determine, examine and determine.
In the present embodiment, voltage stabilizing diode D selects the 10A diode for use, the first potentiometer W1 selects 20k Ω multiturn potentiometer for use, resistance R is selected 50k Ω resistance for use, and electric capacity of voltage regulation C selects 10uF electric capacity for use, and DC converter ZLBH selects the 4NIC-DC75W DC converter for use, R1～R22 is 22 300 Ω resistance, W2 transfers resistance among 0～360 Ω, and W3 is 0～30 Ω semifixed resistor, is applicable to the measurement verification of the following direct current milivoltmeter of 5V.
Accuracy depends primarily on the class of accuracy and the stable power resolution of external standard Displaying Meter.Voltage adjuster is used for regulation voltage specially and designs, the precision height, and resolution can reach 0.1uV.In order to improve resolution of the present utility model, a potentiometer that precision is high has been installed in addition, has been made our resolution bring up to 0.01uV at the adjusting port of DC converter.In order to make accuracy of the present utility model be guaranteed, selected the Displaying Meter of 7081 precision digital voltage tables (being the highest Displaying Meter of precision in the laboratory) as our direct voltage source, its accuracy class is 0.01%, has so just guaranteed accuracy of the present utility model.Following table is for using the utility model calibrating instrument and the contrast of using each parameter of conventional criteria device calibrating instrument.
Claims (4)
1. adjustable high stability constant-voltage equipment, it is characterized in that: it comprises:
Accumulator provides the galvanic current potential source;
DC converter, its input end and accumulator link, and the voltage transformation of direct voltage source is become needed DC voltage; The adjustable side and first potentiometer link, and DC voltage is done further to adjust;
Voltage adjuster, the output terminal of input end and DC converter links, and output terminal is adjustable port.
2. adjustable high stability constant-voltage equipment according to claim 1 is characterized in that: described voltage adjuster comprises the roughly adjusted rheostat of mutual series connection, middle accent slide-changing resistor and fine setting slide-changing resistor; Wherein roughly adjusted rheostat is the fixed value resistance of a plurality of equal resistances of series connection, all exports one between adjacent fixed value resistance and selects shelves; The output terminal of described voltage adjuster is two measurement terminal, the sliding end of one of them measurement terminal and middle accent slide-changing resistor links, one of selection shelves between another measurement terminal and fixed value resistance connect, and can regulate between the shelves selecting, and constitute adjustable port.
3. adjustable high stability constant-voltage equipment according to claim 1 and 2, it is characterized in that: it also comprises battery charging circuit, and input end and external power supply link, and output terminal and accumulator are in parallel.
4. adjustable high stability constant-voltage equipment according to claim 1 and 2 is characterized in that: described DC converter input end also is parallel with light emitting diode, and output terminal is parallel with light emitting diode, resistance, voltage stabilizing diode and electric capacity of voltage regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201254375U CN201666947U (en) | 2010-03-04 | 2010-03-04 | Adjustable high-stability constant voltage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201254375U CN201666947U (en) | 2010-03-04 | 2010-03-04 | Adjustable high-stability constant voltage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201666947U true CN201666947U (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201254375U Expired - Fee Related CN201666947U (en) | 2010-03-04 | 2010-03-04 | Adjustable high-stability constant voltage device |
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| Country | Link |
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| CN (1) | CN201666947U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090615A (en) * | 2014-07-04 | 2014-10-08 | 天津市百利电气有限公司 | High-precision voltage stabilizing circuit and voltage stabilizing method |
| CN110133337A (en) * | 2019-05-16 | 2019-08-16 | 中国一冶集团有限公司 | A kind of signal imitation device and adjustment method for instrument debugging |
-
2010
- 2010-03-04 CN CN2010201254375U patent/CN201666947U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090615A (en) * | 2014-07-04 | 2014-10-08 | 天津市百利电气有限公司 | High-precision voltage stabilizing circuit and voltage stabilizing method |
| CN110133337A (en) * | 2019-05-16 | 2019-08-16 | 中国一冶集团有限公司 | A kind of signal imitation device and adjustment method for instrument debugging |
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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: 20101208 Termination date: 20170304 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |