WO2019185028A1 - 一种钢板涂层厚度的测量方法和系统 - Google Patents

一种钢板涂层厚度的测量方法和系统 Download PDF

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Publication number
WO2019185028A1
WO2019185028A1 PCT/CN2019/080450 CN2019080450W WO2019185028A1 WO 2019185028 A1 WO2019185028 A1 WO 2019185028A1 CN 2019080450 W CN2019080450 W CN 2019080450W WO 2019185028 A1 WO2019185028 A1 WO 2019185028A1
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Prior art keywords
coating
strip
thickness
steel
measuring
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Ceased
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PCT/CN2019/080450
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English (en)
French (fr)
Inventor
章华兵
肖稳
李国保
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Priority to CA3093619A priority Critical patent/CA3093619C/en
Priority to JP2020551993A priority patent/JP7065998B2/ja
Priority to MX2020010048A priority patent/MX2020010048A/es
Priority to KR1020207026467A priority patent/KR102431799B1/ko
Priority to EP19774217.4A priority patent/EP3767225B1/en
Publication of WO2019185028A1 publication Critical patent/WO2019185028A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/043—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
    • G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
    • G01B15/02—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring thickness

Definitions

  • the present invention relates to a method and system for measuring thickness, and more particularly to a method and system for measuring the thickness of a coating.
  • oxide spacers such as MgO or Al 2 O 3
  • the purpose of coating the oxide isolating agent is to: (1) prevent bonding between steel strips during high temperature annealing; (2) when high temperature annealing When it rises to about 1100 °C, MgO chemically reacts with the SiO 2 oxide film on the surface of the steel strip to form a magnesium silicate underlayer, which can promote desulfurization and denitrification reaction during high temperature purification annealing.
  • the coated oxide isolating agent and decarburization annealing are usually completed on the same line.
  • the main processes include liquid mixing, stirring, coating and drying, which have an important influence on the quality of oriented silicon steel products.
  • the control of the thickness of the coating is the most critical. If the coating is too thick or too thin, the surface defects of the final product will increase, the steel strip may be wrinkled or even the magnetic properties may be poor. Therefore, the thickness of the coating of the release agent needs to be precisely controlled during the production of oriented silicon steel.
  • the oxide isolating agent is in a powder form after drying, and the adhesion to the strip is weak, it is difficult to measure the thickness thereof.
  • the prior art there are mainly two methods for measuring the thickness of the oxide spacer coating:
  • the on-line measurement method which uses the difference in the reflection intensity of the oxide spacer and the steel sheet by the beta ray, thereby calculating the coating thickness of the spacer.
  • the measurement accuracy and stability of the method are poor.
  • the main reason is that on the one hand, the spacer powder easily contaminates the measuring probe, the probe is greatly affected by the dust environment, and the measuring system needs frequent maintenance and calibration;
  • the release agent coating is uneven in stripe and runs fast with the strip steel. It is difficult for the measurement system to accurately capture the reflected signal of the ⁇ -ray, which is easy to cause a large measurement error.
  • the beta ray source has a specific decay period, requiring periodic replacement of the source, and high measurement and maintenance costs.
  • the other is an off-line measurement method, that is, taking a steel strip coated with a release agent, scraping a certain area of the release agent powder, and weighing the release agent powder off-line, and then converting it into a coating weight per unit area of the release agent.
  • the method has high measurement accuracy, but since the sampling, sample feeding and weighing are all done manually, the standardization operation of the sampling process is high, if the powder is not scraped completely, or the scraping area is too large, or even the powder is scraped. Inadvertent dripping into the sample will cause distortion of the measurement results. Therefore, the labor cost and management cost of the method are high, and it is mostly used for calibration of the coating thickness measurement system.
  • the method is an off-line measurement method, the timeliness and the linearity are poor, and it is difficult to achieve rapid adjustment of the coating thickness.
  • One of the objects of the present invention is to provide a method for measuring the thickness of a steel sheet coating, which can measure the coating thickness of the steel sheet in real time, and has low measurement cost and high measurement accuracy.
  • the present invention provides a method for measuring the thickness of a steel sheet coating, comprising the steps of:
  • the strip thickness T- strip is measured before the coating is applied, the length L of the strip used to form the coil is measured, and after the coating is applied, the strip is crimped to form a coil, and the coated coil is measured.
  • T coating based on A coating thickness T coating was obtained; the units of R, R 0 , L, T strip and T coating were all the same.
  • the strip length L may be the total length of the strip to be measured, or may be the length of the strip that has been crimped to form the coil, that is, the coil length; accordingly, the measured R and R 0 may Measurements are taken after the crimping is completed, and real-time measurements can also be made during the crimping process.
  • L ⁇ 500 m the ratio of the thickness of both sides of the coating to the thickness of the strip is 8.5 to 10.0%. .
  • the method further comprises the steps of: obtaining a measurement accuracy of the coating thickness ⁇ T coating based on the following formula:
  • ⁇ T coating is the measurement accuracy of T coating
  • ⁇ R is the measurement accuracy of R
  • ⁇ R 0 is the measurement accuracy of R 0
  • ⁇ T strip is the measurement accuracy of T strip steel
  • ⁇ L is the measurement precision of L
  • ⁇ R, ⁇ R 0 , ⁇ T strip and ⁇ L are the measurement accuracy of the measuring device.
  • ⁇ L ⁇ ⁇ 5 ⁇ ⁇ L is selected.
  • ⁇ L ⁇ ⁇ 3 ⁇ ⁇ L is selected.
  • ⁇ L ⁇ ⁇ 3 ⁇ ⁇ L is selected.
  • ⁇ R ⁇ ⁇ 5 ⁇ ⁇ R and ⁇ R 0 ⁇ ⁇ 5 ⁇ ⁇ R 0 are selected .
  • ⁇ R ⁇ ⁇ 3 ⁇ ⁇ R and ⁇ R 0 ⁇ ⁇ 3 ⁇ ⁇ R 0 are selected .
  • ⁇ R ⁇ ⁇ 3 ⁇ ⁇ R and ⁇ R 0 ⁇ ⁇ 3 ⁇ ⁇ R 0 are selected .
  • the ⁇ T strip steel ⁇ ⁇ 5 ⁇ ⁇ T strip steel is selected .
  • the ⁇ T strip steel ⁇ ⁇ 3 ⁇ ⁇ T strip steel is selected .
  • the ⁇ T strip steel ⁇ ⁇ 3 ⁇ ⁇ T strip steel is selected .
  • the present invention can select a measuring instrument that satisfies the above measurement accuracy requirements to meet the measurement requirements or production according to the error range allowed by the thickness of the steel plate coating, the theoretical value or the predicted value of the R, R 0 , L or T strip steel . need.
  • another object of the present invention is to provide a measuring system for measuring the thickness of the steel sheet coating described above, which is capable of measuring the coating thickness of the steel sheet in real time, and has low measurement cost and high measurement accuracy.
  • the present invention provides a measuring system for measuring a thickness of a steel sheet coating, comprising:
  • Strip thickness measuring device for measuring strip thickness T strip steel before coating, the strip thickness measuring device is arranged upstream of the coating machine in the direction of strip transport;
  • a strip length measuring device for measuring the length L of the strip forming the steel coil, and the strip length measuring device is disposed upstream of the crimping machine in the direction in which the strip is transported;
  • a coil size measuring device for measuring the outer diameter R of the coated steel coil and the inner diameter R 0 of the coated steel coil is disposed downstream of the crimping machine in the direction of the strip transport, and is in the belt The periphery of the area through which the coated steel coil passes;
  • the control device is respectively connected with the strip thickness measuring device, the strip length measuring device and the steel coil size measuring device to receive the data of the T strip steel , L, R, R 0 transmitted by the measuring device, and output the data through the calculation Coating thickness T coating .
  • the measuring system used for measuring the thickness of the steel sheet coating according to the present invention can measure the thickness of the steel coating layer in real time, thereby realizing on-line measurement of the thickness of the steel coating layer and obtaining measurement data in time.
  • control device further calculates and outputs a measurement accuracy ⁇ T coating of the coating thickness based on the following formula:
  • ⁇ T coating is the measurement accuracy of T coating
  • ⁇ R is the measurement accuracy of R
  • ⁇ R 0 is the measurement accuracy of R 0
  • ⁇ T strip is the measurement accuracy of T strip steel
  • ⁇ L is the measurement precision of L
  • the strip thickness measuring device is an X-ray thickness gauge
  • the strip length measuring device is a Doppler based laser speedometer
  • the steel coil size measuring device is a laser range finder
  • the strip thickness measuring device is preferably an X-ray thickness gauge
  • the strip length measuring device is preferably a laser speedometer based on the Doppler principle, steel.
  • the roll size measuring device is preferably a laser range finder. It should be noted that the X-ray thickness gauge, the laser speedometer, and the laser range finder are all common equipments in the prior art, and the structural features thereof are not described herein again.
  • the method and system for measuring the thickness of the steel plate coating according to the present invention have the following beneficial effects:
  • the method and system for measuring the thickness of the steel sheet coating according to the present invention can measure the coating thickness of the steel sheet in real time, and the measurement cost is low, and the measurement precision is high, thereby contributing to improving the quality of the steel product and reducing the consumption of the coating material.
  • the method and system for measuring the thickness of the steel coating layer according to the present invention can measure the thickness of different types of coatings, and has high versatility, and is particularly suitable for the thickness of powder coatings which are difficult to accurately measure by conventional methods, such as the manufacture of oriented silicon steel.
  • the thickness of the oxide spacer coating such as MgO or Al 2 O 3 in the process.
  • FIG. 1 is a schematic view showing the structure of a measuring system used in a method for measuring the thickness of a steel sheet coating according to some embodiments of the present invention.
  • FIG. 2 is a schematic view showing a measuring step of a method for measuring the thickness of a steel sheet coating according to some embodiments of the present invention.
  • Figure 3 is a graph showing the relationship between the thickness measurement of the strip of Example 42 as a function of the length of the coil.
  • Figure 4 is a graph showing the relationship between the thickness of the coating measured by the measuring method of the present invention and the thickness of the coating measured by the off-line measuring method of the prior art.
  • FIG. 1 is a schematic structural view of a measuring system used in a method for measuring a thickness of a steel sheet coating according to the present invention. In some embodiments, it can be seen that the measuring method for measuring the thickness of a steel sheet coating according to the present invention is used.
  • the system comprises: a strip thickness measuring device 3, which may be an X-ray thickness gauge, which is arranged upstream of the coating machine 2 in the direction of transport of the strip 1 for measuring the thickness T of the uncoated strip 1
  • Strip steel the specific installation position may be set in the annealing coating process, or may be set at the exit of the cold rolling process before the coating process
  • the strip length measuring device 4 may be a laser speedometer for measuring the formation of steel coil
  • the length L of the strip 1 can be set before the coating machine 2, or before the coiler 6 after the coating machine 2, that is, the device 41 in the figure
  • the coil size measuring device 5 It may be a laser range finder for measuring the outer diameter R of the coated steel coil and the inner diameter R 0 of the coated steel coil, and the specific mounting position may be set at any of the coiled coils of the coiler 6 Position, ie the steel coil size measuring device 5 or device 51 in the figure 52.
  • the measuring system used in the method for measuring the thickness of the steel sheet coating according to the present invention further comprises a control device (not shown) which is combined with the strip thickness measuring device 3, the strip length measuring device 4 and the steel coil size.
  • the measuring devices 5 are respectively connected to receive data of the T- belt , L, R, R 0 transmitted by the measuring device, and calculate the output coating thickness T coating .
  • the X-ray thickness gauge, the laser speedometer, and the laser range finder are all common equipments in the prior art, and the structural features thereof are not described herein again.
  • step 11 is a strip thickness measuring strip with a strip thickness measuring device 3 for measuring a strip .
  • the steel length measuring device 4 measures the length L of the strip forming the steel coil, and measures the outer diameter R of the coated steel coil and the inner diameter R 0 of the coated steel coil by the steel coil size measuring device 5, and the step 12 is based on the formula Calculate the coating thickness T coating , where the unit parameters of R, R 0 , L, T strip and T coating are the same, and based on the formula Calculate the measurement accuracy of coating thickness ⁇ T coating , wherein ⁇ T coating is the coating precision T coating measurement accuracy, ⁇ R is the measurement accuracy of R, ⁇ R 0 is the measurement accuracy of R 0 , ⁇ T strip is T strip steel The measurement accuracy, ⁇ L is the measurement accuracy of L, where ⁇ R, ⁇ R 0 , ⁇ T strip and ⁇ L are the measurement accuracy of the measuring device.
  • Step 13 is to display the measurement accuracy of the coating thickness and the coating thickness by a control device (not shown).
  • Example 1-5 After the strip of Example 1-5 was annealed, Al 2 O 3 was coated by a two-roll coater, and the strip was taken up after drying with Al 2 O 3 .
  • the running speed of the strip is 50-120 m/min, the strip thickness before coating is 0.14-0.35 mm, the length of the strip forming the steel coil is 6000-16000 m, and the weight of the coated steel coil is 14-21 t.
  • the thickness of the strip before the strip coil coating is applied with a T Steel and coating thickness T coating units are converted to the same and based on the formula Calculate the measurement accuracy of the coating thickness ⁇ T coating , wherein the ⁇ T coating is the measurement accuracy of the coating thickness T coating , ⁇ R is the measurement accuracy of the outer diameter R of the coated steel coil, and ⁇ R 0 is the coated steel coil.
  • the measurement accuracy of the inner diameter R 0 , the ⁇ T strip is the measurement accuracy of the strip thickness T strip before the coating is applied, and ⁇ L is the measurement accuracy of the length L of the strip forming the coil.
  • Table 1 lists the outer diameter R of the coated steel coil measured in Examples 1-5, the inner diameter R 0 of the coated steel coil, the length L of the steel strip forming the steel coil, and the belt before coating.
  • Example 6-41 After the strip of Example 6-41 was annealed, Al 2 O 3 was coated with a two-roll coater, and the strip was drawn after drying with Al 2 O 3 .
  • the coil is formed of the strip length L, uncoated with the coating thickness T of the strip
  • the units of steel and coating thickness T coating are the same.
  • the thickness T of the strip theoretical value of 0.285 mm, an inner diameter of the coated coil 508mm theoretical value R 0, the outer diameter of the coated coil Theory R The value is 1835 mm, and the length L of the strip forming the steel coil is 8000 m, according to the formula.
  • the theoretical value of the coating thickness T coating can be calculated to be 20.2 ⁇ m (the so-called theoretical value is a known set of amounts used in this case to verify the measurement deviation of the coating thickness).
  • Table 2-1 lists the measurement deviations of the outer diameter R of the coated steel coils of Examples 6-14 and the measurement deviation of the coating thickness at this deviation
  • Table 2-2 lists Examples 15-23.
  • Table 2-3 lists the strip length L used to form the steel coil in Examples 24-32 in measurement bias and measuring the deviation of coating thickness variation
  • table 2-4 lists the measured strip thickness variation embodiment of the strip T 33-41 uncoated and coated at a coating thickness of this deviation Measurement deviation.
  • the measurement deviation of the coating thickness is calculated by using the theoretical value of the coating thickness of the T coating and the steel sheet obtained by the measuring method of the present invention, that is, the embodiment 6-41 is intended to verify: the selected measuring instrument has In the case of measurement error, the calculated coating thickness measurement is accurate and its difference from the theoretical value.
  • Example 6 1831 -4 -2.2 ⁇ -6.67%
  • Example 7 1832 -3 -1.6 ⁇ -5.00%
  • Example 8 1833 -2 -1.1 ⁇ -3.33%
  • Example 9 1834 -1 -0.5 ⁇ -1.66%
  • Example 10 1835 0 0.0 ⁇ 0.00%
  • Example 11 1836 1 0.5 ⁇ 1.66%
  • Example 12 1837 2 1.1 ⁇ 3.32%
  • Example 13 1838 3 1.6 ⁇ 4.97%
  • Example 14 1839 4 2.2 ⁇ 6.62%
  • Example 15 504 -4 -7.9 ⁇ 1.83%
  • Example 16 505 -3 -5.9 ⁇ 1.37%
  • Example 17 506 -2 -3.9 ⁇ 0.92%
  • Example 18 507 -1 -2.0 ⁇ 0.46%
  • Example 19 508 0 0.0 ⁇ 0.00%
  • Example 20 509 1 2.0 ⁇ -0.46%
  • Example 21 510 2 3.9 ⁇ -0.92%
  • Example 22 511 3 5.9 ⁇ -1.39%
  • Example 23 512 4 7.9 ⁇ -1.85%
  • Example 24 7992 -8 -1.00 ⁇ 1.41%
  • Example 25 7994 -6 -0.75 ⁇ 1.06%
  • Example 26 7996 -4 -0.50 ⁇ 0.70%
  • Example 27 7998 -2 -0.25 ⁇ 0.35%
  • Example 28 8000 0 0.00 ⁇ 0.00%
  • Example 29 8002 2 0.25 ⁇ -0.35%
  • Example 30 8004 4 0.50 ⁇ -0.70%
  • Example 31 8006 6 0.75 ⁇ -1.06%
  • Example 33 284.2 -0.8 -2.81 ⁇ 3.95%
  • Example 34 284.4 -0.6 -2.11 ⁇ 2.96%
  • Example 35 284.6 -0.4 -1.41 ⁇ 1.98%
  • Example 36 284.8 -0.2 -0.70 ⁇ 0.99%
  • Example 37 285.0 0 0.00 ⁇ 0.00%
  • Example 38 285.2 0.2 0.70 ⁇ -0.99%
  • Example 39 285.4 0.4 1.41 ⁇ -1.98%
  • Example 40 285.6 0.6 2.11 ⁇ -2.96%
  • Example 41 285.8 0.8 2.81 ⁇ -3.95%
  • Example 6 the coating thickness deviation of Example 6 was the largest (-6.67%), and the coating thickness deviations of Examples 10, 19, 28, and 37 were the smallest (0.00%), and the steel coating was known according to the art.
  • the measurement deviation of the thickness below 10% is highly accurate, and therefore the measurement method of the present invention is accurate and high.
  • Example 42 After the strip of Example 42 was annealed, MgO was coated by a two-roll coater, and the MgO was dried and then taken up. The strip runs at a speed of 85 m/min.
  • the thickness T of the strip before the strip by the X-ray thickness gauge uncoated coating to form L coated with a laser range finder measurement coil outer diameter of the length of the strip coil measured with a laser velocimeter R, the inner diameter R 0 of the coated steel coil, wherein the measurement accuracy of the X-ray thickness gauge is ⁇ 0.14 ⁇ m, the measurement accuracy of the laser speedometer is ⁇ 0.5 ⁇ L, and the measurement accuracy of the laser range finder is ⁇ 1mm .
  • the coil is formed of the strip length L, uncoated with the coating thickness T of the strip.
  • Figure 3 is a graph showing the relationship between the measured thickness of the strip of the strip of Example 42 as a function of the length of the coil, and it can be seen that when the length of the coil is less than 500 m, the strip is taken up in a small amount, and the measured There is some degree of distortion in the coating thickness T coating data. When the take-up length exceeds about 500 meters, the sum of the double-sided thickness of the coating/the thickness of the strip is between 8.5 and 10.0%, and the coating thickness measurement T coating tends to be stable.
  • Figure 4 is a graph showing the relationship between the thickness of the coating measured by the measuring method of the present invention and the thickness of the coating measured by the off-line measuring method of the prior art.
  • the source of each point value of the sum of the double-sided film thicknesses/the thickness of the strip in the figure is the data of 500 meters before the stripping of the strip is taken, and the sum of the double-sided film thicknesses/the thickness of the strip is calculated, which is multiple times. Measure the average.
  • the off-line measured film thickness refers to the scraping of a certain area of the release agent powder off-line, and the release agent powder is weighed and converted into the coating weight per unit area of the release agent.
  • the value of the correlation coefficient R_sq is 95.1% (R_sq is between 0 and 1.
  • R_sq is between 0 and 1.
  • the correlation between the thickness of the double-sided film thickness/the thickness of the strip and the measured thickness of the off-line film is good, indicating that the measurement accuracy of the coating thickness measured by the measuring method of the present invention can meet the production requirements.

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  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
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Abstract

公开一种钢板涂层厚度的测量方法，包括步骤：测量带有涂层的带钢形成的钢卷的外径R，钢卷的内径R0，基于T涂层=π/4（R2-R0 2）/L-T带钢获得涂层厚度T涂层；其中外径R，内径R0，长度L，带钢厚度T带钢，以及涂层厚度T涂层的单位参量均相同。还公开一种钢板涂层厚度的测量方法所采用的测量系统，包括带钢厚度测量装置，沿带钢传输的方向设于涂层机的上游，用于测量带钢厚度T带钢；带钢长度测量装置，测量形成钢卷的带钢的长度L；钢卷尺寸测量装置，测量钢卷的外径和钢卷的内径R0；控制装置，与带钢厚度测量装置，带钢长度测量装置和钢卷尺寸测量装置分别连接，以接收器传输的数据，并计算输出涂层厚度T涂层。

Description

一种钢板涂层厚度的测量方法和系统 技术领域
本发明涉及一种厚度的测量方法和系统，尤其涉及一种涂层厚度的测量方法和系统。
背景技术
取向硅钢制造过程中需要涂覆MgO或Al 2O 3等氧化物隔离剂，涂覆氧化物隔离剂的目的是：(1)防止钢带间在高温退火时粘结；(2)当高温退火升到约1100℃时，MgO与钢带表面SiO 2氧化膜起化学反应形成硅酸镁底层，可在高温净化退火时促进脱硫和脱氮反应。涂覆氧化物隔离剂与脱碳退火通常在同一条作业线上完成，主要工序包括配液、搅拌、涂覆和烘干等，对取向硅钢产品质量有重要影响。其中，对涂层厚度的控制最为关键，涂层过厚或过薄都会导致最终产品表面缺陷增多、带钢局部产生褶皱甚至磁性能不良。因此，取向硅钢生产过程中需要精确控制隔离剂的涂层厚度。
由于氧化物隔离剂经烘干后呈粉末形态，与带钢的粘附力弱，因此对其厚度的测量有很大难度。现有技术中，对氧化物隔离剂涂层厚度的测量方法主要有以下两种：
一种是在线测量方法，即利用β射线对氧化物隔离剂和对钢板的反射强度的不同，进而计算出隔离剂的涂层厚度。然而，在实际生产过程中，该方法的测量准确性和稳定性差，主要原因是，一方面隔离剂粉末容易污染测量探头，探头受粉尘环境影响大，测量系统需要频繁维护与校准；另一方面隔离剂涂层呈现条纹不平状并随带钢快速运行，测量系统难以精确捕捉β射线的反射信号，易造成测量误差大。此外，β射线放射源有特定的衰减周期，需要定期更换放射源，测量与维护成本高。
另一种是离线测量方法，即取涂覆隔离剂后的带钢样板，刮取一定面积的隔离剂粉末，离线对隔离剂粉末进行称重，再换算为单位面积隔离剂的涂层重量。该方法测量精度较高，但是由于取样、送样和称量等环节均由人工完成， 对取样过程的标准化作业要求高，如果粉末刮取不全，或者刮取面积过大，甚至刮取粉末过程中因汗水不慎滴落进入样品，都会造成测量结果失真，因此，该方法的人力成本与管理成本高，多用于涂层厚度测量系统的标定。此外，由于该方法为离线测量方法，及时性和在线性差，难以做到涂层厚度的快速调节。
基于此，希望获得一种钢板涂层厚度的测量方法，该测量方法可以实时测量钢板的涂层厚度，且测量成本低、测量精度高。
发明内容
本发明的目的之一在于提供一种钢板涂层厚度的测量方法，该测量方法可以实时测量钢板的涂层厚度，且测量成本低、测量精度高。
为了实现上述目的，本发明提出了一种钢板涂层厚度的测量方法，包括步骤：
在涂覆涂层前测量带钢厚度T 带钢，测量用于形成钢卷的带钢的长度L，在涂覆涂层后，对带钢进行卷曲以形成钢卷，测量带涂层钢卷的外径R、带涂层钢卷的内径R 0；
基于
Figure PCTCN2019080450-appb-000001
获得涂层厚度T 涂层；其中R、R 0、L、T 带钢以及T 涂层的单位均相同。
在上述测量方法中，带钢长度L可以为待测量的带钢的总长度，也可以为已卷曲形成钢卷的带钢长度，即卷取长度；相应地，所测量的R和R 0可以在卷曲完成后进行测量，也可以在卷曲过程中进行实时测量。
进一步地，L≥500米，涂层双面厚度之和与带钢厚度之比为8.5～10.0％。。
进一步地，在本发明所述的钢板涂层厚度的测量方法中，还包括步骤：基于下述公式获得涂层厚度的测量精度ΔT 涂层：
Figure PCTCN2019080450-appb-000002
其中，ΔT 涂层为T 涂层的测量精度，ΔR为R的测量精度，ΔR 0为R 0的测量精度，ΔT 带钢为T 带钢的测量精度，ΔL为L的测量精度，ΔR、ΔR 0、ΔT 带钢以及ΔL为测量装置的测量精度。
更进一步地，在本发明所述的钢板涂层厚度的测量方法中，选取ΔL≤±5‰×L。
进一步地，在本发明所述的钢板涂层厚度的测量方法中，选取ΔL≤±3‰×L。
在上述优选的技术方案中，为了提高涂层厚度的测量精度，选取ΔL≤±3‰×L。
进一步地，在本发明所述的钢板涂层厚度的测量方法中，选取ΔR≤±5‰×R以及ΔR 0≤±5‰×R 0。
进一步地，在本发明所述的钢板涂层厚度的测量方法中，选取ΔR≤±3‰×R以及ΔR 0≤±3‰×R 0。
在上述优选的技术方案中，为了提高涂层厚度的测量精度，选取ΔR≤±3‰×R以及ΔR 0≤±3‰×R 0。
进一步地，在本发明所述的钢板涂层厚度的测量方法中，选取ΔT 带钢≤±5‰×T 带钢。
进一步地，在本发明所述的钢板涂层厚度的测量方法中，选取ΔT 带钢≤±3‰×T 带钢。
在上述优选的技术方案中，为了提高涂层厚度的测量精度，选取ΔT 带钢≤±3‰×T 带钢。
进一步地，本发明可以根据钢板涂层厚度允许的误差范围，R、R 0、L或T 带钢的理论值或预估的数值来选择满足上述测量精度要求的测量仪器来满足测量要求或生产需要。
相应地，本发明的另一目的在于提供一种上述钢板涂层厚度的测量方法所采用的测量系统，该测量系统能够实时测量钢板的涂层厚度，且测量成本低、测量精度高。
为了实现上述目的，本发明提出了一种钢板涂层厚度的测量方法所采用的测量系统，包括：
带钢厚度测量装置，用于在涂覆涂层前测量带钢厚度T 带钢，该带钢厚度测量装置沿带钢传输的方向设于涂层机的上游；
带钢长度测量装置，用于测量形成钢卷的带钢的长度L，带钢长度测量装置沿带钢传输的方向设置在卷曲机的上游；
钢卷尺寸测量装置，用于测量带涂层钢卷的外径R和带涂层钢卷的内径R 0，钢卷尺寸测量装置沿带钢传输的方向设置在卷曲机的下游，并在带涂层钢卷经过的区域外围；
控制装置，与所述带钢厚度测量装置、带钢长度测量装置和钢卷尺寸测量装置分别连接，以接收测量装置传输的T 带钢、L、R、R 0的数据，并通过数据计算输出涂层厚度T 涂层。
上述技术方案中，本发明所述的钢板涂层厚度的测量方法所采用的测量系统可以实时测量钢板涂层厚度，从而可以实现对钢板涂层厚度的在线测量并及时得到测量数据。
进一步地，在本发明所述的测量系统中，所述控制装置还基于下述公式计算并输出涂层厚度的测量精度ΔT 涂层：
Figure PCTCN2019080450-appb-000003
其中，ΔT 涂层为T 涂层的测量精度，ΔR为R的测量精度，ΔR 0为R 0的测量精度，ΔT 带钢为T 带钢的测量精度，ΔL为L的测量精度，其中ΔR、ΔR 0、ΔT 带钢以及ΔL为测量装置的测量精度。
进一步地，在本发明所述的测量系统中，所述带钢厚度测量装置为X射线测厚仪，并且/或者所述带钢长度测量装置为基于多普勒原理的激光测速仪，并且/或者所述钢卷尺寸测量装置为激光测距仪。
在本发明所述的测量系统中，为了提高涂层厚度的测量精度，带钢厚度测量装置优选为X射线测厚仪，带钢长度测量装置优选为基于多普勒原理的激光测速仪，钢卷尺寸测量装置优选为激光测距仪。需要说明的是，X射线测厚仪、激光测速仪以及激光测距仪均为现有技术中的常用设备，其结构特征此处不再赘述。
本发明所述的钢板涂层厚度的测量方法和系统与现有技术相比具有如下有益效果：
(1)本发明所述的钢板涂层厚度的测量方法和系统能够实时测量钢板的涂层厚度，且测量成本低、测量精度高，从而有利于提升钢产品质量，降低涂层原料的消耗。
(2)本发明所述的钢板涂层厚度的测量方法和系统可以测量不同类型涂层的厚度，通用性强，尤其适用于采用传统方法难以准确测量的粉末状涂层厚度，如取向硅钢制造过程中的MgO或Al 2O 3等氧化物隔离剂涂层的厚度。
附图说明
图1为本发明所述的钢板涂层厚度的测量方法所采用的测量系统在某些实施方式下的结构示意图。
图2为本发明所述的钢板涂层厚度的测量方法在某些实施方式下的测量步骤示意图。
图3为实施例42的带钢的涂层厚度测量值随着卷取长度变化的关系图。
图4为用本发明所述的测量方法测得的涂层厚度与用现有技术中的离线测量方法测得的涂层厚度间的关系图。
具体实施方式
下面将结合附图说明和具体的实施例对本发明所述的钢板涂层厚度的测量方法和系统做进一步的解释和说明，然而该解释和说明并不对本发明的技术方案构成不当限定。
图1为本发明所述的钢板涂层厚度的测量方法所采用的测量系统在某些实施方式下的结构示意图，可以看出，本发明所述的钢板涂层厚度的测量方法所采用的测量系统包括：带钢厚度测量装置3，可以是X射线测厚仪，其沿带钢1传输的方向设于涂层机2的上游，用于测量未涂覆涂层的带钢1的厚度T 带钢，其具体安装位置可以设在退火涂层工序中，也可以设在涂层工序前的冷轧工序的出口；带钢长度测量装置4，可以是激光测速仪，用于测量形成钢卷的带钢1的长度L，其具体安装位置可以设在涂层机2之前，也可以设在涂层机2之后卷取机6之前，即图中的装置41；钢卷尺寸测量装置5，可以是激光测距仪， 用于测量带涂层钢卷的外径R和带涂层钢卷的内径R 0，其具体安装位置可以设在卷取机6的卷取钢卷外围的任一位置，即图中的钢卷尺寸测量装置5或装置51或装置52。此外，本发明所述的钢板涂层厚度的测量方法所采用的测量系统还包括控制装置(图中未示出)，其与带钢厚度测量装置3、带钢长度测量装置4和钢卷尺寸测量装置5分别连接，以接收测量装置传输的T 带钢、L、R、R 0的数据，并计算输出涂层厚度T 涂层。
需要说明的是，X射线测厚仪、激光测速仪以及激光测距仪均为现有技术中的常用设备，其结构特征此处不再赘述。
图2为本发明所述的钢板涂层厚度的测量方法在某些实施方式下的测量步骤示意图，可以看出，步骤11为用带钢厚度测量装置3测量带钢厚度T 带钢，用带钢长度测量装置4测量形成钢卷的带钢的长度L，用钢卷尺寸测量装置5测量带涂层钢卷的外径R、带涂层钢卷的内径R 0，步骤12为基于公式
Figure PCTCN2019080450-appb-000004
计算涂层厚度T 涂层，其中R、R 0、L、T 带钢以及T 涂层的单位参量均相同，并基于公式
Figure PCTCN2019080450-appb-000005
计算涂层厚度的测量精度ΔT 涂层，其中，ΔT 涂层为涂层厚度T 涂层的测量精度，ΔR为R的测量精度，ΔR 0为R 0的测量精度，ΔT 带钢为T 带钢的测量精度，ΔL为L的测量精度，其中ΔR、ΔR 0、ΔT 带钢以及ΔL为测量装置的测量精度。步骤13为用控制装置(图中未示出)显示涂层厚度及涂层厚度的测量精度。
下面，本技术方案将采用具体的实施例数据进一步描述本案的技术方案并证明本案的有益效果：
实施例1-5
实施例1-5的带钢退火后，采用两辊式涂层机涂覆Al 2O 3，Al 2O 3烘干后对带钢进行卷取。带钢运行速度为50～120m/min，涂覆涂层前的带钢厚度为0.14～0.35mm，形成钢卷的带钢长度为6000-16000m，带涂层钢卷的重量为 14～21t。用X射线测厚仪测量涂覆涂层前的带钢厚度T 带钢，用激光测速仪测量形成钢卷的带钢的长度L，用激光测距仪测量带涂层钢卷的外径R、带涂层钢卷的内径R 0，其中，X射线测厚仪的测量精度为±0.14μm，激光测速仪的测量精度为±0.5‰×L，激光测距仪的测量精度为±1mm。然后基于公式
Figure PCTCN2019080450-appb-000006
计算涂层厚度T 涂层，其中带涂层钢卷的外径R、带涂层钢卷的内径R 0，形成钢卷的带钢的长度L、涂覆涂层前的带钢厚度T 带钢以及涂层厚度T 涂层的单位均换算为相同的，并基于公式
Figure PCTCN2019080450-appb-000007
计算涂层厚度的测量精度ΔT 涂层，其中，ΔT 涂层为涂层厚度T 涂层的测量精度，ΔR为带涂层钢卷的外径R的测量精度，ΔR 0为带涂层钢卷的内径R 0的测量精度，ΔT 带钢为涂覆涂层前的带钢厚度T 带钢的测量精度，ΔL为形成钢卷的带钢的长度L的测量精度。
表1列出了实施例1-5测量得到的带涂层钢卷的外径R、带涂层钢卷的内径R 0，形成钢卷的带钢的长度L、涂覆涂层前的带钢厚度T 带钢的数值，以及计算得到的涂层厚度T 涂层与涂层厚度的测量精度ΔT 涂层的数值。
表1
Figure PCTCN2019080450-appb-000008
实施例6-41
实施例6-41的带钢退火后，采用两辊式涂层机涂覆Al 2O 3，Al 2O 3烘干后对带钢进行卷取。用X射线测厚仪测量涂覆涂层前的带钢厚度T 带钢，用激光测速仪测量形成钢卷的带钢的长度L，用激光测距仪测量带涂层钢卷的外径R、带涂层钢卷的内径R 0，其中，X射线测厚仪的测量精度为±0.14μm，激光测速仪的测量精度为±0.5‰×L，激光测距仪的测量精度为±1mm。然后基于公式
Figure PCTCN2019080450-appb-000009
计算涂层厚度T 涂层，其中带涂层钢卷的外径R、带涂层钢卷的内径R 0，形成钢卷的带钢的长度L、未涂覆涂层的带钢厚度T 带钢以及涂层厚度T 涂层的单位均相同。已经知晓，实施例6-41中未涂覆涂层的带钢的厚度T 带钢理论值为0.285mm，带涂层钢卷内径R 0理论值为508mm，带涂层钢卷外径R理论值为1835mm，形成钢卷的带钢长度L理论值为8000m时，根据公式
Figure PCTCN2019080450-appb-000010
可以计算得到涂层厚度T 涂层理论值为20.2μm(所谓理论值是本案为了验证涂层厚度的测量偏差而采用的一组已知量)。
表2-1列出了实施例6-14中的带涂层钢卷的外径R的测量偏差以及在此偏差下涂层厚度的测量偏差，表2-2列出了实施例15-23中的带涂层钢卷的内径R 0的测量偏差以及在此偏差下涂层厚度的测量偏差，表2-3列出了实施例24-32中用于形成钢卷的带钢长度L的测量偏差以及在此偏差下涂层厚度的测量偏差，表2-4列出了实施例33-41中未涂覆涂层的带钢厚度T 带钢的测量偏差以及在此偏差下涂层厚度的测量偏差。
其中，涂层厚度的测量偏差是通过采用本发明中的测量方法得到的T 涂层与钢板涂层厚度的理论值计算得到的，即实施例6-41意在验证：在选取的测量 仪器有测量误差的情况下，计算得到的涂层厚度测量是否准确，以及其与理论值的差距。
表2-1
  实测外径R(mm) 外径偏差(mm) 外径偏差 涂层厚度测量偏差
实施例6 1831 -4 -2.2‰ -6.67％
实施例7 1832 -3 -1.6‰ -5.00％
实施例8 1833 -2 -1.1‰ -3.33％
实施例9 1834 -1 -0.5‰ -1.66％
实施例10 1835 0 0.0‰ 0.00％
实施例11 1836 1 0.5‰ 1.66％
实施例12 1837 2 1.1‰ 3.32％
实施例13 1838 3 1.6‰ 4.97％
实施例14 1839 4 2.2‰ 6.62％
表2-2
  实测内径R 0(mm) 内径偏差(mm) 内径偏差 涂层厚度测量偏差
实施例15 504 -4 -7.9‰ 1.83％
实施例16 505 -3 -5.9‰ 1.37％
实施例17 506 -2 -3.9‰ 0.92％
实施例18 507 -1 -2.0‰ 0.46％
实施例19 508 0 0.0‰ 0.00％
实施例20 509 1 2.0‰ -0.46％
实施例21 510 2 3.9‰ -0.92％
实施例22 511 3 5.9‰ -1.39％
实施例23 512 4 7.9‰ -1.85％
表2-3
  实测长度L(m) 长度偏差(m) 长度偏差 涂层厚度测量偏差
实施例24 7992 -8 -1.00‰ 1.41％
实施例25 7994 -6 -0.75‰ 1.06％
实施例26 7996 -4 -0.50‰ 0.70％
实施例27 7998 -2 -0.25‰ 0.35％
实施例28 8000 0 0.00‰ 0.00％
实施例29 8002 2 0.25‰ -0.35％
实施例30 8004 4 0.50‰ -0.70％
实施例31 8006 6 0.75‰ -1.06％
实施例32 8008 8 1.00‰ -1.41％
表2-4
  实测厚度T 带钢(μm) 厚度偏差(μm) 厚度偏差 涂层厚度测量偏差
实施例33 284.2 -0.8 -2.81‰ 3.95％
实施例34 284.4 -0.6 -2.11‰ 2.96％
实施例35 284.6 -0.4 -1.41‰ 1.98％
实施例36 284.8 -0.2 -0.70‰ 0.99％
实施例37 285.0 0 0.00‰ 0.00％
实施例38 285.2 0.2 0.70‰ -0.99％
实施例39 285.4 0.4 1.41‰ -1.98％
实施例40 285.6 0.6 2.11‰ -2.96％
实施例41 285.8 0.8 2.81‰ -3.95％
其中，实施例6的涂层厚度测量偏差最大(-6.67％)，实施例10、19、28、37的涂层厚度测量偏差最小(0.00％)，而根据本领域所知的，钢板涂层厚度的测量偏差在10％以下都属于准确度高，因此本发明的测量方法的准确高。
由表2-1、表2-2、表2-3和表2-4可以看出，即使测量设备出现少量偏差，实施例6-41的涂层厚度测量偏差也能够满足正常生产要求。
实施例42
实施例42的带钢退火后，采用两辊式涂层机涂覆MgO，MgO烘干后进行卷取。带钢运行速度为85m/min。用X射线测厚仪测量未涂覆涂层前的带钢厚度T 带钢，用激光测速仪测量形成钢卷的带钢的长度L，用激光测距仪测量带涂层钢卷的外径R、带涂层钢卷的内径R 0，其中，X射线测厚仪的测量精度为±0.14μm，激光测速仪的测量精度为±0.5‰×L，激光测距仪的测量精度为±1mm。然后基于公式
Figure PCTCN2019080450-appb-000011
计算涂层厚度T 涂层，其中带涂层钢 卷的外径R、带涂层钢卷的内径R 0，形成钢卷的带钢的长度L、未涂覆涂层的带钢厚度T 带钢以及涂层厚度T 涂层的单位均相同。
图3为实施例42的带钢的涂层厚度测量值随着卷取长度变化的关系图，可以看出，当卷取长度少于500米时，由于带钢卷取量少，测得的涂层厚度T 涂层数据存在一定程度的失真。当卷取长度超过约500米时，涂层双面厚度之和/带钢厚度介于8.5～10.0％，涂层厚度测量值T 涂层趋于稳定。
图4为用本发明所述的测量方法测得的涂层厚度与用现有技术中的离线测量方法测得的涂层厚度间的关系图。需要说明的是，图中双面膜厚之和/带钢厚度的每一个点值的来源是剔除带钢卷取前500米的数据再计算得到双面膜厚之和/带钢厚度，为多次测量平均值。离线实测膜厚是指离线刮取一定面积的隔离剂粉末，对隔离剂粉末进行称重，再换算为单位面积隔离剂的涂层重量。可以看出，相关系数R_sq的值为95.1％(R_sq介于0至1之间，通常来说，当该值达到0.7以上时认为两参数间具有相关性，该值越接近1说明相关性越好)，双面膜厚之和/带钢厚度与离线实测膜厚两者相关性好，说明用本发明所述的测量方法测得的涂层厚度的测量精度可以满足生产要求。
需要说明的是，本发明的保护范围中现有技术部分并不局限于本申请文件所给出的实施例，所有不与本发明的方案相矛盾的现有技术，包括但不局限于在先专利文献、在先公开出版物，在先公开使用等等，都可纳入本发明的保护范围。
此外，本案中各技术特征的组合方式并不限本案权利要求中所记载的组合方式或是具体实施例所记载的组合方式，本案记载的所有技术特征可以以任何方式进行自由组合或结合，除非相互之间产生矛盾。
还需要注意的是，以上所列举的实施例仅为本发明的具体实施例。显然本发明不局限于以上实施例，随之做出的类似变化或变形是本领域技术人员能从 本发明公开的内容直接得出或者很容易便联想到的，均应属于本发明的保护范围。

Claims (9)

  1. 一种钢板涂层厚度的测量方法，其特征在于，包括步骤：
    在涂覆涂层前，测量带钢厚度T 带钢，测量形成钢卷的带钢的长度L，在涂覆涂层后，对带钢进行卷曲以形成钢卷，测量带涂层钢卷的外径R、带涂层钢卷的内径R 0；
    基于
    Figure PCTCN2019080450-appb-100001
    获得涂层厚度T 涂层；其中所述R、R 0，L、T 带钢以及T 涂层的单位均相同。
  2. 如权利要求1所述的钢板涂层厚度的测量方法，其特征在于，所述L≥500米，涂层双面厚度之和与带钢厚度之比为8.5～10.0％。
  3. 如权利要求1所述的钢板涂层厚度的测量方法，其特征在于，还包括步骤：基于下述公式获得涂层厚度的测量精度ΔT 涂层：
    Figure PCTCN2019080450-appb-100002
    其中，ΔT 涂层为所述T 涂层的测量精度，ΔR为所述R的测量精度，ΔR 0为所述R 0的测量精度，ΔT 带钢为所述T 带钢的测量精度，ΔL为所述L的测量精度，所述ΔR、ΔR 0、ΔT 带钢以及ΔL为测量装置的测量精度。
  4. 如权利要求3所述的钢板涂层厚度的测量方法，其特征在于，选取ΔL≤±3‰×L。
  5. 如权利要求3所述的钢板涂层厚度的测量方法，其特征在于，选取ΔR≤±3‰×R以及ΔR 0≤±3‰×R 0。
  6. 如权利要求3所述的钢板涂层厚度的测量方法，其特征在于，选取ΔT 带钢≤±3‰×T 带钢。
  7. 一种钢板涂层厚度测量系统，其特征在于，包括：
    带钢厚度测量装置，用于在涂覆涂层前测量带钢厚度T 带钢，所述带钢厚度测量装置沿带钢传输的方向设于涂层机的上游；
    带钢长度测量装置，用于测量形成钢卷的带钢的长度L，所述带钢长度测量装置沿带钢传输的方向设置在卷曲机的上游；
    钢卷尺寸测量装置，用于测量带涂层钢卷的外径R和带涂层钢卷的内径R 0，所述钢卷尺寸测量装置沿带钢传输的方向设置在所述卷曲机的下游，并在所述带涂层钢卷经过的区域外围；
    控制装置，与所述带钢厚度测量装置、带钢长度测量装置和钢卷尺寸测量装置分别连接，以接收测量装置传输的所述T 带钢、L、R、R 0的数据，并通过所述数据计算输出涂层厚度T 涂层。
  8. 如权利要求7所述的测量系统，其特征在于，所述控制装置还基于下述公式计算并输出涂层厚度的测量精度ΔT 涂层：
    Figure PCTCN2019080450-appb-100003
    其中，ΔT 涂层为所述T 涂层的测量精度，ΔR为所述R的测量精度，ΔR 0为所述R 0的测量精度，ΔT 带钢为所述T 带钢的测量精度，ΔL为所述L的测量精度，所述ΔR、ΔR 0、ΔT 带钢以及ΔL为测量装置的测量精度。
  9. 如权利要求7或8所述的测量系统，其特征在于，所述带钢厚度测量装置为X射线测厚仪，并且/或者所述带钢长度测量装置为基于多普勒原理的激光测速仪，并且/或者所述钢卷尺寸测量装置为激光测距仪。
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