CN209417278U - A kind of current parameters calibration system based on method of offset - Google Patents
A kind of current parameters calibration system based on method of offset Download PDFInfo
- Publication number
- CN209417278U CN209417278U CN201821930190.7U CN201821930190U CN209417278U CN 209417278 U CN209417278 U CN 209417278U CN 201821930190 U CN201821930190 U CN 201821930190U CN 209417278 U CN209417278 U CN 209417278U
- Authority
- CN
- China
- Prior art keywords
- current
- output interface
- change
- connect
- module
- 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.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a kind of current parameters calibration system, especially a kind of current parameters calibration system based on method of offset.System includes measuring instrument, multi-functional calibration source, current acquisition display module, regulated power supply and host computer；Measuring instrument includes fluxgate current sensor, the first change-over switch, the second change-over switch, third change-over switch and power resistor module；Tested electric current input/output interface, normalized current input/output interface and current measurement input/output interface are additionally provided on measuring instrument；By accessing tested electric current in primary side series connection, connecting on secondary side and access normalized current in a certain proportion of coil of fluxgate current sensor primary and secondary side coiling, pass through adjustment criteria electric current, so that primary current and secondary current are cancelled out each other, using multi-functional calibration source, high-acruracy survey is realized.
Description
Technical field
The utility model relates to a kind of current parameters calibration system, especially a kind of current parameters calibration based on method of offset
System.
Background technique
With the development of guided missile and carrier rocket technology, lighting, fast-response to engine opening and closing control solenoid valve
It is all the more prominent with high reliability request.Bullet/arrow dynamical system realizes that engine repeatedly starts by the multiple opening and closing of solenoid valve, electricity
The reliability and performance of magnet valve decide the success or failure and performance level of engine operation.Solenoid valve is in the engine repeatedly started
It is of crucial importance, especially in attitude control engine, just because of use solenoid valve, just realize engine repeated priming and
Pulsed operation.For the reliability and performance for guaranteeing solenoid valve, needs to measure the steady-state current parameter of solenoid valve, can be used
The satellite booster subsystem GU Generic Unit test equipment (referred to as, special measurement equipment) of Shanghai Research Institute measures, and is inciting somebody to action
Before the special measurement equipment is for the steady-state current parameter measurement of solenoid valve, need to calibrate the special measurement equipment.
But it since such special measurement equipment current measurement module uses metal-oxide-semiconductor, can be damaged according to direct calibration method
Special measurement equipment, therefore cannot be calibrated using direct calibration method.
Utility model content
In order to realize the calibration of such special measurement equipment, the utility model provides a kind of current parameters calibration based on method of offset
System is based on non-touching measurement principles, in a certain proportion of coil of high-precision fluxgate current sensor primary and secondary side coiling,
So that primary current and secondary current are cancelled out each other, the calibration of certain model specific test equipment current parameters is realized.
The technical solution of the utility model is to provide a kind of current parameters calibration system based on method of offset, special
Place is: including measuring instrument, multi-functional calibration source, current acquisition display module, regulated power supply and host computer；
Above-mentioned regulated power supply is used to provide voltage to by the special measurement equipment in school；
Above-mentioned host computer is for reading by the tested current value of the special measurement equipment in school；
Above-mentioned measuring instrument includes fluxgate current sensor, the first change-over switch, the second change-over switch, third change-over switch
And power resistor module；Tested electric current input/output interface, normalized current input/output interface are additionally provided on above-mentioned measuring instrument
And current measurement input/output interface；
Above-mentioned fluxgate current sensor includes primary coil and secondary coil；
One end of tested electric current input interface is connected by cable, the first change-over switch and power resistor module and primary coil
It connects, primary coil is connect by cable with tested current output interface one end；One end of normalized current input interface passes through cable
And second change-over switch connect with secondary coil, secondary coil connects one end of normalized current output interface by cable；Above-mentioned magnetic
The output end of open gate current sensor is connected to by cable and third change-over switch with current measurement output interface one end；Electric current is surveyed
Amount input interface one end is connect with fluxgate current sensor；
The other end of above-mentioned tested electric current input/output interface is for connecing by the special measurement equipment in school；The input of above-mentioned standard electric current is defeated
The other end of outgoing interface is connect with multi-functional calibration source, another termination current acquisition display module of above-mentioned current output interface,
Current measurement input interface one end is connect with fluxgate current sensor；
Further, above-mentioned power resistor module is N number of, wherein N >=2, each power resistor wired in parallel setting；
The input terminal of above-mentioned first change-over switch is connect by cable with one end of tested electric current input interface, and above-mentioned first
The output end and power resistor module of change-over switch correspond, and are connect respectively with each power resistor module by cable.
Further, the current acquisition display module is digital multimeter.
Further, the measuring instrument further includes the radiating module connecting with power resistor module.
It further, further include 220V power filtering module, first switch power supply, refrigeration device and second switch power supply,
220V power filtering module passes through second switch power supply and first switch power supply and fluxgate current sensor and refrigerator respectively
Part connection.
Further, the refrigeration device is fan.
The beneficial effects of the utility model are:
1, the utility model is by a certain proportion of coil of fluxgate current sensor primary and secondary side coiling, in primary side
Series connection accesses tested electric current, connects on secondary side and accesses normalized current, by adjustment criteria electric current, so that primary current and secondary side electricity
Stream is cancelled out each other, and using multi-functional calibration source, realizes high-acruracy survey.
2, the utility model includes the power resistor module of N number of parallel connection, realizes multiple spot calibration, the calibration factor finally obtained
Accuracy is high；
3, the utility model structure is simple, it is only necessary to provide multi-functional calibration source, regulated power supply, digital multimeter and measurement
Current parameters calibration can be realized in cable, and method is feasible, effective, has promotional value.
Detailed description of the invention
Fig. 1 is current parameters calibration system block diagram of the utility model based on method of offset；
Fig. 2 is the utility model measuring instrument functional block diagram.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, to for example related each component of specific embodiment of the present utility model,
The effect of mutual alignment and connection relationship, each section between each section and working principle etc. are described in further detail.
It will be seen from figure 1 that current parameters calibration system of the present embodiment based on method of offset mainly includes measuring instrument, more function
It can calibration source, current acquisition display module, regulated power supply and host computer；Current acquisition display module is that number is more in the present embodiment
With table, regulated power supply, host computer are connect with by the special measurement equipment in school, and regulated power supply is used to provide voltage to by the special measurement equipment in school；
Host computer is for reading by the tested current value of the special measurement equipment in school；By the special measurement equipment in school, multi-functional calibration source and digital multimeter
It is connect with measuring instrument.
Figure it is seen that the present embodiment measuring instrument mainly includes fluxgate current sensor and power resistor module,
On also have that there are three interface with external connection, respectively tested electric current input/output interfaces, normalized current input/output interface
And current measurement input/output interface, inside further include and one-to-one three change-over switches of three external interfaces, respectively
For the first change-over switch, the second change-over switch, third change-over switch.
Fluxgate current sensor includes primary coil and secondary coil；Power resistor module is 1 or N number of.This implementation
N is equal to 10 in example.When for 1, the input/output terminal of corresponding first change-over switch respectively with tested electric current input interface and
After power resistor module is connected by cable, power resistor module passes through cable with the primary coil of fluxgate current sensor again
Connection；When power resistor module is N number of, corresponding first change-over switch includes N number of output port, input terminal and tested electricity
It flows input interface to connect by cable, N number of output port connects one to one with N number of power resistor module respectively, each power mould
Block is connect with the primary coil of fluxgate current sensor by cable again respectively.Normalized current input interface passes through the second conversion
Switch is connect with the secondary coil of fluxgate current sensor by cable.The output end of fluxgate current sensor passes through third
Change-over switch is connect with current measurement output interface.The other end of tested electric current input/output interface connects with by the special measurement equipment in school
It connects；The other end of normalized current input/output interface is connect with multi-functional calibration source, current measurement input/output interface it is another
Terminate digital multimeter.In measuring instrument, it is tested electric current I1Pass through tested electric current input interface, the first change-over switch, power electricity
It hinders module and accesses fluxgate current sensor primary side, normalized current I2It is connect by normalized current input interface, the second change-over switch
Enter fluxgate current sensor pair side, exports electric current IOPass through fluxgate current sensor output end, third change-over switch, electric current
Output interface accesses digital multimeter.
The present embodiment measuring instrument further include radiating module, 220V power filtering module, first switch power supply, refrigeration device and
Second switch power supply, refrigeration device is fan in the embodiment.Radiating module is connect with power resistor module, is used for power resistor
The heat dissipation of module, reduces power resistor temperature drift, and 220V power filtering module passes through second switch power supply respectively and first opens
Powered-down source is connect with fluxgate current sensor and refrigeration device, is that fluxgate current sensor and fan are powered, fan is to scattered
Thermal modules heat dissipation.
After the connection of each equipment is finished and powered on, measuring instrument is switched into first passage, that is, adjusts the first change-over switch, by the
The output end of one change-over switch is connect with the first power resistor module, completes the connection of the first current channel；Regulated power supply output
28V voltage forms closed circuit by the special measurement equipment in school and regulated power supply, test cable, measuring instrument, and being tested electric current is I1, primary side
Coiling the number of turns is N1；It adjusts multi-functional calibration source and exports DC current I2To the secondary coil of fluxgate current sensor, secondary side around
The number of turns processed is N2, so that digital multimeter DC current measures is leveled off to zero, output current indication value is IO。
It is calculated according to formula (1):
N1I1-N2I2=kIO (1)
It obtains:K is conversion ratio.
If IOLevel off to zero, when can ignore,
The standard current value of first calibration point is obtained at this time, i.e., when the first power resistor module being accessed circuit, obtains
Standard current value, while by reading tested current value by the special measurement equipment host computer in school；
Measuring instrument is switched into second channel, i.e., the first change-over switch is equally adjusted, by the output end of the first change-over switch
It is connect with the second power resistor module, completes the connection of the second current channel, repeat the above process, be similarly obtained second calibration
The data of point obtain the data of the tenth calibration point until switching to the tenth channel.The present embodiment passes through 10 power resistors
10 current point test datas and 10 current standard values can be obtained, by current measurement value and electric current mark in the switching of module
Quasi- value carries out least square fitting operation, obtains correction coefficient, realizes calibration.
Claims (6)
1. a kind of current parameters calibration system based on method of offset, it is characterised in that: including measuring instrument, multi-functional calibration source, electricity
Flow acquisition display module, regulated power supply and host computer；
The regulated power supply is used to provide voltage to by the special measurement equipment in school；
The host computer is for reading by the tested current value of the special measurement equipment in school；
The measuring instrument includes fluxgate current sensor, the first change-over switch, the second change-over switch, third change-over switch and function
Rate resistive module；Tested electric current input/output interface, normalized current input/output interface and electricity are additionally provided on the measuring instrument
Flow measurement input/output interface；
The fluxgate current sensor includes primary coil and secondary coil；
One end of tested electric current input interface is connect by cable, the first change-over switch and power resistor module with primary coil,
Primary coil is connect by cable with tested current output interface one end；One end of normalized current input interface passes through cable and the
Two change-over switches are connect with secondary coil, and secondary coil connects one end of normalized current output interface by cable；The fluxgate
The output end of current sensor is connected to by cable and third change-over switch with current measurement output interface one end；Current measurement is defeated
Incoming interface one end is connect with fluxgate current sensor；
The other end of tested electric current input/output interface is for connecing by the special measurement equipment in school；Normalized current input/output interface it is another
End is connect with multi-functional calibration source, another termination current acquisition display module of the current measurement input/output interface.
2. the current parameters calibration system according to claim 1 based on method of offset, it is characterised in that:
The power resistor module is N number of, wherein N >=2, each power resistor wired in parallel setting；
The input terminal of first change-over switch is connect by cable with one end of tested electric current input interface, first conversion
The output end and power resistor module of switch correspond, and are connect respectively with each power resistor module by cable.
3. the current parameters calibration system according to claim 1 based on method of offset, it is characterised in that: the current acquisition
Display module is digital multimeter.
4. the current parameters calibration system according to claim 1 based on method of offset, it is characterised in that: the measuring instrument is also
Including the radiating module being connect with power resistor module.
5. the current parameters calibration system according to claim 1 based on method of offset, it is characterised in that: further include 220V electricity
Source filter module, first switch power supply, refrigeration device and second switch power supply, 220V power filtering module pass through second respectively and open
Powered-down source and first switch power supply are connect with fluxgate current sensor and refrigeration device.
6. the current parameters calibration system according to claim 5 based on method of offset, it is characterised in that: the refrigeration device
For fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821930190.7U CN209417278U (en) | 2018-11-21 | 2018-11-21 | A kind of current parameters calibration system based on method of offset |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821930190.7U CN209417278U (en) | 2018-11-21 | 2018-11-21 | A kind of current parameters calibration system based on method of offset |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209417278U true CN209417278U (en) | 2019-09-20 |
Family
ID=67934853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821930190.7U Active CN209417278U (en) | 2018-11-21 | 2018-11-21 | A kind of current parameters calibration system based on method of offset |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209417278U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459717A (en) * | 2018-11-21 | 2019-03-12 | 西安航天计量测试研究所 | A kind of current parameters calibration system and method based on method of offset |
| CN110749848A (en) * | 2019-09-25 | 2020-02-04 | 西安航天计量测试研究所 | Current parameter calibration system and method based on current channel switching instrument |
-
2018
- 2018-11-21 CN CN201821930190.7U patent/CN209417278U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459717A (en) * | 2018-11-21 | 2019-03-12 | 西安航天计量测试研究所 | A kind of current parameters calibration system and method based on method of offset |
| CN110749848A (en) * | 2019-09-25 | 2020-02-04 | 西安航天计量测试研究所 | Current parameter calibration system and method based on current channel switching instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209417278U (en) | A kind of current parameters calibration system based on method of offset | |
| CN106125813A (en) | A kind of high stability constant-current source of portable wide amount limit | |
| CN209417277U (en) | A kind of current parameters calibration system | |
| CN108663650B (en) | Electric energy meter on-site calibration device and method | |
| CN106154030B (en) | A kind of intelligent electric meter and its data encryption and transmission method | |
| CN110749848A (en) | Current parameter calibration system and method based on current channel switching instrument | |
| CN109669152A (en) | A kind of current parameters calibration system and method | |
| CN2874514Y (en) | Full automatic resistance corrector | |
| CN109459717A (en) | A kind of current parameters calibration system and method based on method of offset | |
| CN209992882U (en) | Output voltage adjustable power control circuit | |
| CN104569846A (en) | Battery cell testing system | |
| CN104166413A (en) | Dry type transformer temperature controller and control method thereof | |
| EP3565076A1 (en) | Protection circuit and air conditioner | |
| CN104750158A (en) | High accuracy constant current source with open circuit protection function | |
| CN103926441B (en) | Novel voltage divider | |
| CN104090052B (en) | Gas chromatograph and its multichannel carrier gas stream, gas path control method | |
| CN107727147B (en) | A kind of gas sensing and UV optical detection integrated system | |
| CN110514854A (en) | A kind of device and control method improving automatic lmunoassays analyzer measurement stability | |
| CN108008228A (en) | A kind of chip-Size semiconductor gas sensor aging equipment | |
| CN115480612A (en) | Ultra-high stability bipolar current source circuit adaptive to wide-temperature environment | |
| CN208508828U (en) | Sample circuit and electric machine control system | |
| CN209656135U (en) | A kind of resistance-type magnetic float liquidlevel meter measuring system | |
| CN103066926A (en) | Automatic digital zeroing circuit for integral circuit | |
| CN207964975U (en) | A kind of chip-Size semiconductor gas sensor aging equipment | |
| CN207677696U (en) | A kind of programmable gain amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |