CN1758013A - Iron object surface coating layer and thickness measuring instrument of non iron composite layer - Google Patents
Iron object surface coating layer and thickness measuring instrument of non iron composite layer Download PDFInfo
- Publication number
- CN1758013A CN1758013A CN 200410066926 CN200410066926A CN1758013A CN 1758013 A CN1758013 A CN 1758013A CN 200410066926 CN200410066926 CN 200410066926 CN 200410066926 A CN200410066926 A CN 200410066926A CN 1758013 A CN1758013 A CN 1758013A
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- China
- Prior art keywords
- magnetic field
- iron
- surface coating
- measuring instrument
- thickness measuring
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Abstract
A thickness measuring instrument for measuring the thickness of the coated layer on the surface of iron workpiece is composed of magnetic field generator, magnetic field intensity sensor, amplifier and display. The magnetic field intensity acting on said sensor is associated with the thickness of coated layer (magnetic gap), so the thickness can be indirectly measured.
Description
Affiliated technical field
The present invention relates to the electronic device that object thickness is measured, especially for thickness measure to iron-piece surface coating and non iron composite bed.
Background technology
At present, to the thickness measure of iron-piece surface coating, non iron composite bed, be the gross thickness that measures measured piece earlier with measurer, deduct ironware thickness again, obtain the thickness of its surface coating or composite bed.When not knowing ironware thickness, need that also coating is struck off the back ironware is measured; Also will do section to composite members measures.Not only measure trouble, and sample has been caused destruction.Because present method need be used two faces of testee, and can not measure on a surface, thereby can't measure surface coating as finished products such as household electrical appliances, automobiles.
Summary of the invention
It is the surveying instrument that outside surface just can be measured its surface coating and non iron composite bed thickness in the one side of object only that the object of the invention is to provide a kind of, uses with convenient.
The solution of the present invention is: the present invention includes magnetic field generator, magnetic field strength transducer, amplifying circuit, display, on a semi-open-type iron core, magnetic field generator and magnetic field strength transducer are set, magnetic field generator adopts coil or magnet, magnetic field strength transducer adopts linear Hall unit, magnetic field strength transducer is connected with input amplifier, and amplification circuit output end is connected with display.
Advantage of the present invention is: this device is provided with magnetic field generator and magnetic field strength transducer on the semi-open-type iron core, openend with iron core during measurement is close to the testee surface, the magnetic line of force that magnetic field generator produces forms the loop through iron core, measured iron pieces, act on magnetic field strength transducer, the electric signal of its output amplifies through amplifying circuit, shows on display.Because when magnetic field intensity is constant, the thickness that acts on magnetic field intensity and coating on surface of article or non iron composite bed on the magnetic field strength transducer is that the magnetic circuit gap length is relevant, be inversely proportional to,, can measure the thickness of measured layer indirectly therefore according to the signal of this sensor output.
Description of drawings
The invention will be further described with embodiment with reference to the accompanying drawings below.
Fig. 1 is a measuring probe structure synoptic diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Among the figure: 1 iron core, 2 lead-in wires, 3 fixed covers, L coil, IC
1Magnetic field strength transducer, IC
2Amplifier, IC
3Integrated package of pressure-stabilizing, G display, K power switch.
Embodiment
Magnetic field generator can adopt coil or magnet, as long as can produce constant magnetic field, that present embodiment adopts is coil L.
Magnetic field strength transducer IC
1Adopt linear Hall unit, model is UGN3503, and the voltage signal of its output and the linear ratio of magnetic field size of passing this element are inverse ratio, as power supply 5V, and output 2.5V during zero magnetic field, output 1.0V during saturation magnetic field.
Described semi-open-type iron core 1 is the semi-circular soft magnetism iron core that an end opens wide, and fracture is arranged in the middle of this iron core, and is fixing by the fixed cover 3 of non-ferrous material, magnetic field strength transducer IC
1Be embedded in fracture to go between and 2 draw, the magnetic line of force is passed wherein.
With reference to Fig. 2, magnetic field strength transducer IC
1With R
1, R
2, R
3, R
4, IC
2The input amplifier of forming connects, and amplification circuit output end is connected with display G, and G adopts gauge outfit, with resistance R
5Be used to show IC after the series connection
2Output voltage.
Integrated package of pressure-stabilizing IC
3, capacitor C forms mu balanced circuit, is used for the voltage of stabilizing circuit, makes coil L produce constant magnetic field.
R
2Adopt potentiometer, in order to amplifying circuit is returned to zero.
During work, earlier detecting head is close on cleaning surfaces, the smooth iron block or iron bar, the energized K switch, the L energising, its action of a magnetic field is in IC
1, through R
1, R
2, R
3, R
4, IC
2The amplifying circuit of forming amplifies, and shows on gauge outfit G, adjusts R this moment
2, making G is " 0 " scale.
During measurement, detecting head is close to the testee surface, because the existence of surface coating or non iron composite bed is arranged, there is the gap in magnetic circuit, acts on IC
1On magnetic field and zeroing the time be in a ratio of little, IC
1It is big that output becomes, and amplifies back G displayed value and become big.
When superficial layer is thick more, it is big more that G shows, like this, is carved into corresponding scale on gauge outfit, just can demonstrate the thickness on tested top layer.
Embodiment adopts miniwatt coil and suitable big core section, like this, when surveying sheet iron, can prevent to reach capacity by the magnetic line of force in this sheet iron material, to guarantee the accuracy of measurement result.
Claims (4)
1. iron-piece surface coating and non iron composite bed thickness measuring instrument, comprise magnetic field generator, magnetic field strength transducer, amplifying circuit, display, it is characterized in that: on a semi-open-type iron core, magnetic field generator and magnetic field strength transducer are set, magnetic field strength transducer is connected with input amplifier, and amplification circuit output end is connected with display.
2. iron-piece surface coating as claimed in claim 1 and non iron composite bed thickness measuring instrument is characterized in that: described semi-open-type iron core is the semi-circular soft magnetism iron core that an end opens wide, and in the middle of this iron core fracture is arranged, and magnetic field strength transducer is embedded therein.
3. iron-piece surface coating as claimed in claim 1 and non iron composite bed thickness measuring instrument is characterized in that: magnetic field generator adopts coil or magnet.
4. iron-piece surface coating as claimed in claim 1 and non iron composite bed thickness measuring instrument, it is characterized in that: magnetic field strength transducer adopts linear Hall unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410066926 CN1758013A (en) | 2004-10-09 | 2004-10-09 | Iron object surface coating layer and thickness measuring instrument of non iron composite layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410066926 CN1758013A (en) | 2004-10-09 | 2004-10-09 | Iron object surface coating layer and thickness measuring instrument of non iron composite layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1758013A true CN1758013A (en) | 2006-04-12 |
Family
ID=36703503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410066926 Pending CN1758013A (en) | 2004-10-09 | 2004-10-09 | Iron object surface coating layer and thickness measuring instrument of non iron composite layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1758013A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726239B (en) * | 2008-10-29 | 2012-09-19 | 韩国水力原子力株式会社 | Method for preparing sludge sample for measuring thickness of sludge and method for measuring thickness of sludge by sludge sample |
| CN103206914A (en) * | 2013-03-27 | 2013-07-17 | 苏州江南航天机电工业有限公司 | Device for detecting thickness of pouring coverage layer |
| CN104897040A (en) * | 2015-06-17 | 2015-09-09 | 苏州福德电子科技有限公司 | Automobile paint thickness measuring apparatus and method |
| CN109211083A (en) * | 2018-09-14 | 2019-01-15 | 清华大学 | A method of the wall thickness of measurement surface elastic metal sealing ring |
-
2004
- 2004-10-09 CN CN 200410066926 patent/CN1758013A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726239B (en) * | 2008-10-29 | 2012-09-19 | 韩国水力原子力株式会社 | Method for preparing sludge sample for measuring thickness of sludge and method for measuring thickness of sludge by sludge sample |
| CN103206914A (en) * | 2013-03-27 | 2013-07-17 | 苏州江南航天机电工业有限公司 | Device for detecting thickness of pouring coverage layer |
| CN104897040A (en) * | 2015-06-17 | 2015-09-09 | 苏州福德电子科技有限公司 | Automobile paint thickness measuring apparatus and method |
| CN109211083A (en) * | 2018-09-14 | 2019-01-15 | 清华大学 | A method of the wall thickness of measurement surface elastic metal sealing ring |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |