CN2674639Y - Simulated earth magnetic field measurer - Google Patents
Simulated earth magnetic field measurer Download PDFInfo
- Publication number
- CN2674639Y CN2674639Y CN 03278306 CN03278306U CN2674639Y CN 2674639 Y CN2674639 Y CN 2674639Y CN 03278306 CN03278306 CN 03278306 CN 03278306 U CN03278306 U CN 03278306U CN 2674639 Y CN2674639 Y CN 2674639Y
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- China
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- magnetic field
- aluminium alloy
- earth
- earth magnetic
- simulated earth
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Abstract
Disclosed is a simulated earth magnetic field measurer, characterized in that the aluminium alloy sections are arranged to a measuring frame shaped like Chinese Character'jing', and the four pairs of eight groups of coils are put in the eight plane frames of aluminium alloy section of the measuring frame shaped like Chinese Character'jing. Compared with ordinary simulated earth magnetic field measurers, with the premise that the tructural size of the measuring frame is not increased, the uniformity of magnetic field of the measuring area is raised by times, and the effective measuring area of the device is relatively increased.
Description
One, technical field
The utility model belongs to tester manufacturing technology field.
Two, background technology
Along with popularizing and development of technology of color TV, the screen size of color television set is increasing, and is also more and more higher to the uniformity requirement of colour TV screen color reduction.In the manufacturing and debug process of color television set, in order on entire display screen, to obtain even, the real color effect of comparison, except element, circuit and the Distribution of Magnetic Field of television set self need be proofreaied and correct, must consider that also colour TV is in the influence of the magnetic field of the earth of concrete certain use occasion.Therefore, in order to improve the quality of product, every batch of product that uses in the appointment region all need carry out specific correction in the tester of simulation magnetic field of the earth when dispatching from the factory.
The present simulation magnetic field of the earth testing equipment of using, its test zone all is a cube frame that is made of 24 aluminium alloy extrusions (referring to an accompanying drawing 1), 3 pairs of 6 groups of coils are placed in 6 aluminium alloy extrusions plane frameworks that constitute cube frame, when corresponding simulation magnetic field of the earth electric current that tester provides leads to coil, can in the cube test zone, generate the three-dimensional magnetic field of the earth of a simulation.In order to obtain simulating as far as possible uniformly the magnetic field of the earth, all use the big as far as possible test space usually.But when screen size was big, the increase of the test space brought the floor space increase, can't be connected smoothly with streamline and defective such as uniformity of magnetic field reduction.For example, the common simulation magnetic field of the earth test frame of use 3m * 3m * 3m is debugged the colour TV of 29 inches (74cm), and the evenness errors in its simulation magnetic field of the earth surpasses 10%.
Three, summary of the invention
Purpose of design of the present utility model is the design novel analog magnetic field of the earth tester that a kind of uniformity of magnetic field is higher, test space size is less.
Technical solution of the present utility model is: on the basis of the cube frame that originally is made of 24 aluminium alloy extrusions, distance between the two group aluminum alloy section bar plane frameworks (1) vertically laid and (2) is dwindled, increase by a group aluminum alloy section bar plane framework (4).Promptly be arranged to " well " font test frame shown in the accompanying drawing 2 with 32 aluminium alloy extrusions, 4 pairs of 8 groups of coils are placed in 8 aluminium alloy extrusions plane frameworks of formation " well " glyph framework, when corresponding simulation magnetic field of the earth electric current that tester provides leads to coil, can in test zone, generate a three-dimensional magnetic field of the earth of more uniform simulation.
Four, description of drawings
Fig. 1 is the structural representation of common simulation magnetic field of the earth tester test frame, is made of 24 aluminium alloy extrusions, and 3 pairs of 6 groups of coils are placed in 6 aluminium alloy extrusions plane frameworks that constitute cube frame.
Fig. 2 is an improved simulation magnetic field of the earth tester test frame structural representation.(1), (2) are respectively the two group aluminum alloy section bar plane frameworks of vertically laying among the figure, the two group aluminum alloy section bar plane frameworks that lay for level (3), (4), and 4 pairs of 8 groups of coils are placed in 8 aluminium alloy extrusions plane frameworks that constitute cube frame;
Fig. 3 is the electrical schematic diagram of tester master board, U1 among the figure (89C52) is a master cpu, U2 (74LS373) is a latch, U3 (28C64) is a data storage, and U4 (GAL20V8) is a programmable logic device, and U7, U8 (TLC5617) are respectively 12 Bits Serial D/A converters, U9, U10 (CA084) are amplifier, U19 (74LS14) is an inverter, and U21, U22 (TLP521) are photoelectrical coupler, and Ix, Iy, Iz are respectively the electric current output of simulation magnetic field of the earth.
Five, embodiment
Exemplary embodiments:
(1), (2), (3) three group aluminum alloy section bar plane frameworks are of a size of 2200mm * 2200mm, horizontal aluminium alloy extrusions plane framework group (4) is of a size of 1500mm * 1500mm;
The electrical schematic diagram of master board is seen Fig. 3.Make the master control chip by 8051 (89C52) single-chip microcomputer, store 99 cities or regional magnetic field, four corners of the world amount and 1 standard Magnetic Field of presetting among the U3 (28C64).After selecting definite a certain test mode preset value wherein, can by this master control borad output simulation magnetic field of the earth electric current in the coil of test frame aluminium alloy extrusions, can test the simulation magnetic field of the earth of usefulness for colour TV thereby produce one.
The important technological parameters of tester is as follows:
The maximum variable quantity of directions X magnetic field intensity: ± 1 Gauss (0.1mT)
The maximum variable quantity of Y direction magnetic field intensity: ± 1 Gauss (0.1mT)
The maximum variable quantity of Z direction magnetic field intensity: ± 1 Gauss (0.1mT)
The simulation magnetic field of the earth uniformity of 700mm * 700mm * 700mm center test zone :≤5.0% certainty of measurement: 0.005 Gauss
The utility model is compared with common simulation magnetic field of the earth tester, and under the prerequisite that does not increase tester test frame physical dimension, the uniformity of magnetic field of test zone significantly improves, the corresponding Validity Test zone that has enlarged instrument.
Claims (1)
1. a simulation magnetic field of the earth tester is characterized in that constituting " well " glyph framework by 32 aluminium alloy extrusions, places 4 pairs of 8 groups of coils in 8 aluminium alloy extrusions plane frameworks of " well " glyph framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03278306 CN2674639Y (en) | 2003-09-04 | 2003-09-04 | Simulated earth magnetic field measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03278306 CN2674639Y (en) | 2003-09-04 | 2003-09-04 | Simulated earth magnetic field measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2674639Y true CN2674639Y (en) | 2005-01-26 |
Family
ID=34473751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03278306 Expired - Fee Related CN2674639Y (en) | 2003-09-04 | 2003-09-04 | Simulated earth magnetic field measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2674639Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478647A (en) * | 2010-11-24 | 2012-05-30 | 三菱电机株式会社 | Method for adjusting mri superconducting magnet |
-
2003
- 2003-09-04 CN CN 03278306 patent/CN2674639Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478647A (en) * | 2010-11-24 | 2012-05-30 | 三菱电机株式会社 | Method for adjusting mri superconducting magnet |
| US9013255B2 (en) | 2010-11-24 | 2015-04-21 | Mitsubishi Electric Corporation | Method for adjusting MRI superconducting magnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |