CN210603173U - Coating thickness gauge suitable for iron base and aluminum base - Google Patents
Coating thickness gauge suitable for iron base and aluminum base Download PDFInfo
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- CN210603173U CN210603173U CN201922076613.4U CN201922076613U CN210603173U CN 210603173 U CN210603173 U CN 210603173U CN 201922076613 U CN201922076613 U CN 201922076613U CN 210603173 U CN210603173 U CN 210603173U
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 238000000576 coating method Methods 0.000 title claims abstract description 34
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 230000010355 oscillation Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000006698 induction Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011978 dissolution method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009683 ultrasonic thickness measurement Methods 0.000 description 1
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Abstract
The utility model discloses a coating thickness gauge suitable for iron-based and aluminum-based coating thickness gauges, which comprises a key input module (1), a processor module (2), a power module (3), a display module (4) and a sensor measuring module (5); the utility model discloses a black end white word's segment code liquid crystal display measuring result shows that the typeface is more clear, has compensatied the unable defect that uses of some products in dark surrounds. Meanwhile, the sensor probe integrating electromagnetic induction and eddy current coils is adopted, iron-based and aluminum-based materials are intelligently identified, the complex operation that the probe needs to be replaced when the coating thicknesses of different matrixes are measured is avoided, and the sensor probe is easier to use by a user. The strong operational capability of the STM32 single chip microcomputer is matched, the thickness value of the coating layer is rapidly obtained, the performance is stable, and the reliability is high. In the data processing part, the utility model discloses a maquardt algorithm has fitted the curve relation between frequency and the thickness through measuring many times in Origin software, realizes the stable accurate measurement of different base member surfaces, different coating thickness, has improved the measurement accuracy of this product.
Description
Technical Field
The utility model belongs to high accuracy measurement analytical instrument field specifically is iron-based and aluminium base coating calibrator based on STM32 treater.
Background
The coating layer on the surface of the engineering material has double functions of protection and decoration for the coated substrate. Too thin, too thick or uneven thickness of the coating can have adverse effects on the material and even catastrophic results. Therefore, the thickness of the coating is an important control index in the quality inspection and coating construction process. The measuring methods of the thickness of the coating layer are various, and the coating layer surface can be divided into nondestructive detection and destructive detection according to the existence of the destructiveness of the coating layer surface. The common nondestructive testing methods include coulometry-charge method, magnetic induction thickness measurement method, ultrasonic thickness measurement method, radiation thickness measurement method and the like. The destructive detection method mainly comprises a timing liquid rolling thickness measurement method, a dissolution method, an electrolytic thickness measurement method and the like, and the method is widely applied because nondestructive measurement is convenient and simple to use and does not need to damage a surface coating. Meanwhile, along with the development of electronic technology, the intelligence and accuracy of the instrument become more and more the main standards for selecting products.
SUMMERY OF THE UTILITY MODEL
The utility model aims at designing a with low costs, the degree of accuracy is high, repeatability is strong, response speed is fast be applicable to iron-based and aluminium base coating calibrator, can carry out accurate quick measurement to unknown material coating thickness.
The technical scheme of the utility model is that: a coating thickness gauge suitable for iron-based and aluminum-based comprises a key input module (1), a processor module (2), a power module (3), a display module (4) and a sensor measuring module (5);
one end of the key input module (1) is connected to one end of the processor module (2), the other end of the processor module (2) is respectively connected with one ends of the power supply module (3) and the display module (4), and the third section of the key input module is connected with one end of the sensor measuring module (5); the other end of the sensor measuring module (5) is connected to the power supply module (3).
Furthermore, the processor module (2) adopts STM32F103 as a main control chip, and the kernel of the main control chip is Cortex-M3.
Furthermore, the sensor measuring module (5) works under the control of the processor module (2) and is divided into an electromagnetic induction coil and an eddy current coil; the device mainly comprises a measuring probe coil, an analog operation circuit, a control chip 74HC4060BD and TLC27M 9C.
Furthermore, the power module (3) adopts AMS1117-5.0 and AMS1117-3.3 voltage conversion chips to respectively provide 3.3V voltage for the processor module (2), the display module (4) and the key input module (1) and provide 5V voltage for the sensor measurement module (5).
Furthermore, the key input module (1) adopts 4 independent micro keys, including a power switch key, a single or multiple measurement key, a unit switching key and a calibration key; each key is connected to one pin of the processor module (2).
Furthermore, the display module (4) is a low-power-consumption segment code liquid crystal screen with black matrix and white characters.
The utility model has the advantages that 1, the measurement result is displayed by adopting the segment code liquid crystal with black bottom and white characters, the characters are clear, the segment code liquid crystal display can be normally used in daytime and at night, and the defect that some products can not be used in dark environment is overcome; 2. fitting a curve relation between frequency and thickness in Origin software through multiple measurements by adopting a Marquardt algorithm, and realizing stable and accurate measurement of the thicknesses of different coating layers on different substrate surfaces; 3. adopt electromagnetic induction and eddy current unite two into one sensor probe, can intelligent recognition iron-based and aluminium base material, avoided the loaded down with trivial details operation that need change the probe when measuring different base member and scribble the coating thickness, the powerful operational capability of cooperation STM32 singlechip simultaneously can obtain fast and scribble the coating thickness value, stable performance, the reliability is high.
Drawings
Fig. 1 is a schematic view of the present invention;
FIG. 2 is a schematic diagram of a sensor measuring probe according to the present invention;
fig. 3-6 are circuit schematic diagrams of the present invention;
FIG. 1 is a key input module; 2 is a processor module, 3 is a power supply module; 4 is a display module; and 5 is a sensor measuring module.
Detailed Description
The technical scheme of the utility model is explained in detail below with the examples and the attached drawings of the specification:
as shown in the figure, the coating thickness gauge suitable for the iron base and the aluminum base comprises a key input module (1), a processor module (2), a power supply module (3), a display module (4) and a sensor measuring module (5);
one end of the key input module (1) is connected to one end of the processor module (2), the other end of the processor module (2) is respectively connected with one ends of the power supply module (3) and the display module (4), and the third section of the key input module is connected with one end of the sensor measuring module (5); the other end of the sensor measuring module (5) is connected to the power supply module (3).
Furthermore, the processor module (2) adopts STM32F103 as a main control chip, and the kernel of the main control chip is Cortex-M3;
the processor module (2) is an STM32 single chip microcomputer; it is characterized by low power consumption and low cost; high performance; because the thickness change of the coating is converted into frequency change through an analog circuit of the sensor measuring module (5), under the support of the power module (3), the processor module (2) responds to the instruction of the key input module (1) and controls a timer of the STM32 singlechip to input and capture the change of frequency; and processing the obtained information according to a preset algorithm and program, calculating the thickness of the current coating layer, and storing and displaying useful information.
Furthermore, the sensor measuring module (5) mainly comprises a measuring probe coil, an analog operation circuit and a control chip 74HC4060BD and TLC27M 9C; the electromagnetic induction coil works under the control of the processor module (2) and is divided into an electromagnetic induction coil and an eddy current coil; respectively measuring the thicknesses of the coating layers suitable for iron base and aluminum base;
when a user measures the thickness, the analog data is processed by the analog operation circuit through the measuring probe coil, so that the change of the thickness is converted into the change of the frequency and is input into the STM32 singlechip, and the processor module (2) acquires signals; the method has the characteristics of high precision and strong repeatability.
Furthermore, the power module (3) adopts two 3.7V lithium batteries connected in series, the power module (3) adopts an AMS1117-5.0 and AMS1117-3.3 voltage conversion chip, and voltage conversion is carried out through the voltage stabilization chip AMS1117-3.3 and AMS1117-5.0, so that 3.3V voltage is respectively provided for the processor module (2), the display module (4) and the key input module (1), and 5V voltage is provided for the sensor measurement module (5); its advantages are high conversion efficiency and low power consumption.
Furthermore, the key input module (1) adopts 4 independent micro keys, including a power switch key, a single or multiple measurement key, a unit switching key and a calibration key; each key is connected with one pin of the processor module (2); when the key is pressed, the processor generates corresponding interrupt to execute corresponding functions.
Furthermore, the display module (4) is a low-power-consumption segment code liquid crystal screen with black matrix and white characters; has the characteristics of low power consumption, clear display and simple driving, and can be normally used in the environment of minus 5 ℃ to 60 ℃.
The processor module (2) is an STM32 single chip microcomputer, and the processor module (2) adopts an STM32F103 chip; the sensor measuring module (5) integrates the eddy current coil and the magnetic induction coil into the same measuring probe coil, respectively drives the control chip 74HC4060BD and the TLC27M9C, and leads out four wires as an interface connection main board from the measuring probe coil; the power module (3) adopts chips AMS1117-5.0 and AMS1117-3.3 to form direct current voltage of 5V and 3.3V.
FIG. 2 is a schematic view of a coil structure of a measuring probe in the sensor measuring module (5); comprises a coil 1, a coil 2, a coil 3 and a probe framework; coil 1, coil 2 and coil 3 twine on the probe skeleton, wherein electromagnetic induction coil's measurement principle: two groups of coils are used for measuring an iron base (equal to a primary coil and a secondary coil of a transformer) in a measuring probe coil, a coil 2 is used for generating a stable oscillation signal, a coil 1 is used for coupling the stable oscillation signal by utilizing magnetic induction, testing the frequency of the stable oscillation signal and reversely deducing the thickness of a coating; according to the standard thickness sample test, the following relation between the coating thickness and the oscillation frequency is obtained:
the functional relationship between the coating thickness D and the oscillation frequency F is obtained by fitting in Origin software by using a Marquardt algorithm as follows:
D＝21.76338+7.8726E24*exp(-0.66412*F)
and the thickness of the coating layer on the iron-based surface can be measured in real time by utilizing the D-F function relation.
The principle of eddy current coil measurement: in a test circuit, a high-frequency signal is generated by LC oscillation of a coil 3 and a capacitor, the signal is subjected to frequency division of a chip 74HC4060BD to obtain a stable square wave signal, when a measurement probe coil is close to the surface of a non-magnetic material, an eddy current signal is generated in a measured substrate, the magnetic field of the eddy current signal is increased along with the approach of the measurement probe coil and the measured substrate, and the Lenz law shows that the magnetic field generated by the eddy current signal weakens the original magnetic field of the probe and is equivalent to the reduction of the inductance L of an LC oscillation circuit, so that the oscillation frequency F is increased; conversely, when the probe is far away from the measured matrix, the magnetic field in the probe is enhanced, which is equivalent to the fact that the inductance L of the LC oscillating circuit is increased, and the oscillating frequency F is reduced; the thickness of the coating on the tested substrate can be indirectly measured by testing the LC oscillation frequency F.
Similar to the iron-based test, the following data corresponding to the coating thickness and oscillation frequency were obtained according to the standard thickness coupon test:
the functional relationship between the coating thickness D and the oscillation frequency F is obtained by fitting through a Marquardt software algorithm as follows:
D＝-179.8032+5.0243E14*exp(-0.01375*F)
by utilizing the D-F function relation, the coating thickness of the aluminum-based surface can be measured in real time.
The invention adopts the segment code liquid crystal display with black bottom and white characters to display the measurement result, the displayed characters are clearer, and the defect that some products can not be used in dark environment is overcome; meanwhile, the sensor probe integrating electromagnetic induction and eddy current is adopted to intelligently identify iron-based and aluminum-based materials, so that the complex operation that the probe needs to be replaced when the coating thicknesses of different matrixes are measured is avoided, and the sensor probe is easier to use by a user; the thickness value of the coating layer is rapidly obtained by matching with the strong operational capability of the STM32 singlechip, the performance is stable, and the reliability is high; in the data processing part, the Marquardt algorithm is adopted, the curve relation between the frequency and the thickness is fitted in Origin software through multiple measurements, the stable and accurate measurement of different substrate surfaces and different coating layer thicknesses is realized, and the measurement accuracy of the product is improved.
The thickness gauge designed by the utility model adopts the scheme of combining the magnetic induction thickness measuring method and the eddy current thickness measuring method in the nondestructive testing, thereby greatly increasing the application range of the thickness gauge, and simultaneously enhancing the usability of the gauge by adopting an intelligent interaction and management software system; the hardware of the thickness gauge adopts the eddy current principle and the magnetic induction principle, so that the change of the thickness of a coating is accurately converted into the change of frequency through the analog circuit, and because the eddy current principle circuit and the magnetic induction principle circuit can share one probe, the design cost is greatly reduced; the software function designs a set of intelligent system which integrates multiple functions of measuring algorithm, man-machine interaction and the like, and has the function of user-defined calibration, so that the accuracy of the instrument is improved, the thickness gauge can return to a standard measuring state through manual calibration when an error occurs, the reliability of the instrument is improved, and the actual application requirements are met.
Above embodiment only is for explaining the utility model discloses a technical thought can not be injectd for this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope.
Claims (6)
1. A coating thickness gauge suitable for iron base and aluminum base is characterized in that: the coating thickness gauge comprises a key input module (1), a processor module (2), a power supply module (3), a display module (4) and a sensor measuring module (5);
one end of the key input module (1) is connected to one end of the processor module (2), the other end of the processor module (2) is respectively connected with one ends of the power supply module (3) and the display module (4), and the third end of the processor module is connected with one end of the sensor measuring module (5); the other end of the sensor measuring module (5) is connected to the power supply module (3).
2. A coating thickness gauge suitable for use with iron-based and aluminum-based applications as claimed in claim 1, wherein: the processor module (2) adopts STM32F103 as a main control chip, and the kernel of the processor module is Cortex-M3.
3. A coating thickness gauge suitable for use with iron-based and aluminum-based applications as claimed in claim 1, wherein: the sensor measuring module (5) works under the control of the processor module (2) and is divided into an electromagnetic induction coil and an eddy current coil; the device mainly comprises a measuring probe coil, an analog operation circuit, a control chip 74HC4060BD and TLC27M 9C.
4. A coating thickness gauge suitable for use with iron-based and aluminum-based applications as claimed in claim 1, wherein: the power module (3) adopts AMS1117-5.0 and AMS1117-3.3 voltage conversion chips to respectively provide 3.3V voltage for the processor module (2), the display module (4) and the key input module (1) and provide 5V voltage for the sensor measurement module (5).
5. A coating thickness gauge suitable for use with iron-based and aluminum-based applications as claimed in claim 1, wherein: the key input module (1) adopts 4 independent micro keys, including a power switch key, a single or multiple measurement key, a unit switching key and a calibration key; each key is connected to one pin of the processor module (2).
6. A coating thickness gauge suitable for use with iron-based and aluminum-based applications as claimed in claim 1, wherein: the display module (4) is a low-power-consumption segment code liquid crystal screen with black matrixes and white characters.
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| CN201922076613.4U CN210603173U (en) | 2019-11-27 | 2019-11-27 | Coating thickness gauge suitable for iron base and aluminum base |
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| CN201922076613.4U CN210603173U (en) | 2019-11-27 | 2019-11-27 | Coating thickness gauge suitable for iron base and aluminum base |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113109424A (en) * | 2021-04-13 | 2021-07-13 | 广州市果欧电子科技有限公司 | Steel structure weld joint detection method and detection system |
| CN113175863A (en) * | 2021-04-20 | 2021-07-27 | 深圳市林上科技有限公司 | Iron powder doped putty layer identification method and paint film instrument |
| CN113340187A (en) * | 2021-06-01 | 2021-09-03 | 青岛汉泰电子有限公司 | Thickness gauge, control circuit and magnetic and eddy current dual-mode measuring method |
| TWI740739B (en) * | 2020-12-01 | 2021-09-21 | 財團法人金屬工業研究發展中心 | Electromagnetic testing element and fabrication method thereof and thickness detection method |
| CN114413740A (en) * | 2022-02-21 | 2022-04-29 | 深圳市聚茂源科技有限公司 | Coating thickness gauge and application method thereof |
-
2019
- 2019-11-27 CN CN201922076613.4U patent/CN210603173U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI740739B (en) * | 2020-12-01 | 2021-09-21 | 財團法人金屬工業研究發展中心 | Electromagnetic testing element and fabrication method thereof and thickness detection method |
| CN113109424A (en) * | 2021-04-13 | 2021-07-13 | 广州市果欧电子科技有限公司 | Steel structure weld joint detection method and detection system |
| CN113175863A (en) * | 2021-04-20 | 2021-07-27 | 深圳市林上科技有限公司 | Iron powder doped putty layer identification method and paint film instrument |
| CN113175863B (en) * | 2021-04-20 | 2023-03-14 | 深圳市林上科技有限公司 | Iron powder doped putty layer identification method and paint film instrument |
| CN113340187A (en) * | 2021-06-01 | 2021-09-03 | 青岛汉泰电子有限公司 | Thickness gauge, control circuit and magnetic and eddy current dual-mode measuring method |
| CN113340187B (en) * | 2021-06-01 | 2022-09-02 | 青岛汉泰电子有限公司 | Thickness gauge, control circuit and magnetic and eddy current dual-mode measuring method |
| CN114413740A (en) * | 2022-02-21 | 2022-04-29 | 深圳市聚茂源科技有限公司 | Coating thickness gauge and application method thereof |
| CN114413740B (en) * | 2022-02-21 | 2024-02-27 | 深圳市聚茂源科技有限公司 | Coating thickness gauge and application method thereof |
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Granted publication date: 20200522 |