Multi-parameter fusion standard and preparation method

Abstract

The present invention provides a multi-parameter fusion standard and a preparation method, comprising a plurality of first calibration units and a second calibration unit: the first calibration unit comprises a first coating with a set characteristic value, which is used to calibrate the characteristic linearity and characteristic range; wherein each of the first calibration units corresponds to a different characteristic value; the second calibration unit comprises a second coating and a third coating with a set shape and characteristic value, the second coating and the third coating alternately form a target pattern, which is used to calibrate the surface distribution measurement parameter, wherein the characteristic value of the second coating is greater than that of the third coating; and a plurality of the first calibration units and the second calibration units are distributed in an array. The present invention sets the first calibration unit and the second calibration unit, and sets a plurality of calibration units in the same spatial position, so that calibration can be achieved simultaneously and in the same position without introducing series errors.

Description

Technical Field

[0001] The present invention relates to the technical field of parameter calibration, and in particular to a multi-parameter fusion standard and a preparation method thereof. Background Art

[0002] In the field of intelligent perception, the synchronous acquisition and fusion processing of multiple parameters is the current development trend. The current traditional calibration is generally carried out with one standard device for one physical quantity, and multiple parameters need to be calibrated with multiple standards. Whether it is replacing the standard device or using multiple standards, it will inevitably lead to calibration that is not done at the same time or in the same position, which will introduce a series of errors. Summary of the invention

[0003] The present invention provides a multi-parameter fusion standard and a preparation method, which are used to solve the problem that in the prior art, one physical quantity is calibrated using one standard, and multiple parameters need to be calibrated using multiple standards. No matter whether the standard is replaced or multiple standards are used, it will inevitably lead to calibration that is not performed at the same time or at the same position, which will introduce a series of errors.

[0004] The present invention discloses a multi-parameter fusion standard device, comprising a plurality of first calibration units and a second calibration unit:

[0005] The first calibration unit includes a first coating material for setting a characteristic value, which is used to calibrate the characteristic linearity and characteristic range; wherein each of the first calibration units corresponds to a different characteristic value;

[0006] The second calibration unit includes a second coating and a third coating of set shapes and characteristic values, the second coating and the third coating alternately form a target pattern for calibrating surface distribution measurement parameters, wherein the characteristic value of the second coating is greater than that of the third coating;

[0007] A plurality of the first calibration units and the second calibration units are distributed in an array.

[0008] According to a multi-parameter fusion standard provided by the present invention, the first coating, the second coating and the third coating are all made by mixing materials in set proportions, so that the first calibration unit and the second calibration unit both have two characteristics of reflectance and emissivity.

[0009] According to a multi-parameter fusion standard provided by the present invention, the reflectance and emissivity of the first calibration unit and the second calibration unit have spectral flatness, and the relative change does not exceed 10% of their own values.

[0010] According to a multi-parameter fusion standard provided by the present invention, the first coating, the second coating and the third coating are made by mixing gold powder and carbon powder in a set ratio, and the value of the reflectance is positively correlated with the content of the gold powder.

[0011] A multi-parameter fusion standard provided by the present invention also includes:

[0012] The upper range limit determination unit is made of pure gold powder and is used to determine the upper range limit of the device to be calibrated;

[0013] The lower range limit determination unit is made of carbon nanotubes and is used to determine the lower range limit of the device to be calibrated.

[0014] According to a multi-parameter fusion standard provided by the present invention, the plurality of first calibration units and the second calibration units are distributed in an array, comprising:

[0015] The plurality of first calibration units are arranged in sequence according to the magnitude of the characteristic quantity values, and the second calibration units and the arranged first calibration units form an array shape.

[0016] According to a multi-parameter fusion standard provided by the present invention, characteristic values ​​corresponding to the plurality of first calibration units increase or decrease.

[0017] According to a multi-parameter fusion standard provided by the present invention, the second coating and the third coating are fan-shaped, and the target pattern is circular.

[0018] A multi-parameter fusion standard provided by the present invention also includes:

[0019] A substrate, wherein the substrate is roughened and the first calibration unit and the second calibration unit are arranged on the surface; after the first calibration unit and the second calibration unit are arranged, the diameter of particles on the surface of the substrate is 45 to 55 um.

[0020] The present invention also provides a method for preparing a multi-parameter fusion standard, which is used to prepare the multi-parameter fusion standard. The preparation method comprises:

[0021] Prepare a first coating, a second coating, and a third coating with set characteristic values;

[0022] Spraying the first coating onto the surface of the substrate in sequence according to a set order to obtain a plurality of first calibration units to calibrate characteristic linearity and characteristic range;

[0023] Spraying the second coating and the third coating alternately onto the surface of the substrate, the second coating and the third coating form a target pattern to obtain a second calibration unit, the second calibration unit and the first calibration unit are arranged in an array to calibrate surface distribution measurement parameters;

[0024] The first coating has a plurality of characteristic values, and the characteristic value of the second coating is greater than that of the third coating.

[0025] The multi-parameter fusion standard and preparation method provided by the present invention provide a first calibration unit and a second calibration unit, and provide a plurality of calibration units in the same spatial position, thereby enabling simultaneous and same-position calibration without introducing series errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a schematic diagram of the structure of a multi-parameter fusion standard provided by an embodiment of the present invention;

[0028] Figure 2 is a structural schematic diagram of a second calibration unit provided in an embodiment of the present invention;

[0029] Figure 3 It is a flow chart of the method for preparing a multi-parameter fusion standard provided in an embodiment of the present invention.

[0030] In the figure, 100 is a first calibration unit; 200 is a second calibration unit; and 300 is a substrate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0033] Figure 1 is a schematic diagram of the structure of a multi-parameter fusion standard provided by an embodiment of the present invention, referring to Figure 1 The present invention provides a multi-parameter fusion standard, including a plurality of first calibration units 100 and a second calibration unit 200:

[0034] The first calibration unit 100 includes a first coating material for setting a characteristic value, which is used to calibrate the characteristic linearity and characteristic range; wherein each first calibration unit 100 corresponds to a different characteristic value;

[0035] The second calibration unit 200 includes a second coating and a third coating of set shapes and characteristic values, the second coating and the third coating alternately form a target pattern for calibrating a surface distribution measurement parameter, wherein the characteristic value of the second coating is greater than that of the third coating;

[0036] A plurality of the first calibration units 100 and the second calibration units 200 are distributed in an array.

[0037] Optionally, the first calibration unit 100 provided by the present invention can be used to calibrate multiple infrared parameters. Taking the field of radiation temperature measurement as an example, the intelligent sensing device needs to measure both the ambient reflected radiation (passive radiation) based on the reflection characteristics and the target active emission based on the emissivity characteristics.

[0038] Intelligent sensing devices refer to intelligent devices that can sense, collect, and autonomously judge, analyze, and process external environmental information. Intelligent sensing devices are multi-component integrated circuits with information collection, processing, exchange, storage, and transmission functions. They are system-level devices that integrate sensors, communication modules, microprocessors, drivers and interfaces, and software algorithms. They have self-learning, self-diagnosis, and self-compensation capabilities, as well as perception fusion and flexible communication capabilities.

[0039] Intelligent sensing devices in the field of radiation temperature measurement include infrared thermometers, which are devices that use infrared rays to measure temperature. The temperature measurement principle of infrared thermometers is the blackbody radiation law. As we all know, all objects above absolute zero in nature are constantly radiating energy outward. The size of the object's outward radiation energy and its distribution by wavelength are closely related to its surface temperature. The higher the temperature of the object, the stronger the infrared radiation capacity it emits. The spectral radiation emittance of a blackbody is determined by Planck's formula.

[0040] It is understandable that the present invention sets the first calibration unit 100 and the second calibration unit 200, and sets multiple calibration units in the same spatial position, which can realize simultaneous and co-position calibration without introducing series errors. The present invention is a standard infrared reflectance standard sample for calibrating the accuracy of reflection measurement of intelligent sensing devices, and is also an emissivity standard sample for calibrating the accuracy of emission characteristics of intelligent sensing devices.

[0041] The characteristic values ​​of the first calibration unit 100 and the second calibration unit 200 have been determined. The intelligent sensing device measures the characteristic values ​​of the first calibration unit 100 and the second calibration unit 200. By comparing the measured characteristic values ​​with the characteristic values ​​of the first calibration unit 100 and the second calibration unit 200, the accuracy of the intelligent sensing device can be determined and the intelligent sensing device can be calibrated.

[0042] Based on the above embodiment, as an optional embodiment, the first coating, the second coating and the third coating are all made by mixing materials in set proportions, so that the first calibration unit 100 and the second calibration unit 200 both have both reflectance and emissivity characteristics.

[0043] The percentage of radiation energy reflected by an object to the total radiation energy is called reflectivity. The reflectivity of different objects is also different, which mainly depends on the nature of the object itself (surface condition), as well as the wavelength and angle of incidence of the incident electromagnetic wave. The range of reflectivity is always less than or equal to 1. The reflectivity can be used to judge the nature of the object.

[0044] Reflectance is the percentage of diffuse light energy that is reflected from a material. When you increase the HSV value (V) of a material, the material will reflect more diffuse light, and decreasing the Opacity of a material will also decrease its reflectance.

[0045] As for the relationship between reflectance and emissivity, usually, assuming that the surface state of the sample conforms to the Lambertian property and the sample does not have transmission, reflectance + emissivity = 1. In the case of poor Lambertian properties, this relationship does not exist.

[0046] Optionally, each of the first calibration unit 100 and the second calibration unit 200 of the present invention needs to be individually calibrated or measured for its reflectance value and emissivity accurate value.

[0047] Optionally, the second coating is white, which is a high-emissivity coating, and the third coating is black, which is a low-emissivity coating. The second calibration unit 200 is used to calibrate an MTF (Modulation Transfer Function) parameter or a resolution parameter of the surface distribution measurement device.

[0048] MTF is used in everything from simple spherical single lenses to complex multi-element telecentric lens assemblies and telecentric optical modules. The most important components of MTF are: resolution and contrast. MTF is a way to combine resolution and contrast into a single specification or rule.

[0049] Resolution is the ability of an imaging system to distinguish detail in an object. It is usually expressed in line pairs per millimeter (lp / mm) (where a line pair is a sequence of one black and one white line). This line pair per millimeter measurement is also called frequency. The inverse of the frequency yields the spacing in millimeters between two resolution lines. For all imaging elements, perfect line edges will be blurred to some extent when imaging the resolution board. A high resolution image is an image that exhibits a lot of detail with minimal blur. Conversely, a low resolution image lacks detail.

[0050] It is understandable that the prior art only has a single calibration sample for reflectance or emissivity, while the present application mixes materials in a set ratio to form the first coating, the second coating and the third coating, so that the first calibration unit 100 and the second calibration unit 200 both have two measurement characteristics of reflectance and emissivity, which can be used to calibrate the fusion parameters of reflectance and emissivity of intelligent sensing devices.

[0051] Based on the above embodiment, as an optional embodiment, the reflectance and emissivity of the first calibration unit 100 and the second calibration unit 200 have spectral flatness, and the relative change does not exceed 10% of their own values.

[0052] Optionally, in order to be applicable to smart devices with different spectral responses, the reflectance and emissivity of each unit of the above standard should have spectral flatness with wavelength, and the maximum relative change with wavelength should not exceed 10% of its own value. For example, an 85% standard requires that the reflectance change with wavelength should not exceed 85%±8.5% within the range of 2-16um.

[0053] It can be understood that the present invention can improve the accuracy of calibration by setting the amplitude value of the relative change of reflectance and emissivity.

[0054] Based on the above embodiment, as an optional embodiment, the first coating, the second coating and the third coating are made by mixing gold powder and carbon powder according to a set ratio, and the value of the reflectance is positively correlated with the content of the gold powder.

[0055] Optionally, considering that it is mainly used in the infrared band and requires spectral flatness, the processed and prepared substrate 300 is mainly made of pure gold and pure carbon.

[0056] The highest reflectivity of 95% (emissivity is close to 5%) is achieved by roughening the aluminum substrate 300 and then plating the surface with pure gold.

[0057] The standard sample with a reflectance of 85% (emissivity close to 15%) is made by mixing gold powder with carbon powder and then adding a binder for spraying. The proportion of carbon powder is about 0.5%. The preparation of other samples with different reflectance ratios also uses a mixture of gold powder and carbon powder in different proportions.

[0058] It can be understood that the present invention can achieve that the first calibration unit 100 and the second calibration unit 200 have reflectance and emissivity characteristics by setting the formula of the first coating, the second coating and the third coating, thereby realizing calibration by fusing two different parameters.

[0059] Based on the above embodiment, as an optional embodiment, it also includes:

[0060] The upper range limit determination unit is made of pure gold powder and is used to determine the upper range limit of the device to be calibrated. In terms of the upper range limit, a diffuse reflection gold plate is used as a high reflectance sample to evaluate the upper range limit of the intelligent sensing device.

[0061] The lower limit determination unit is made of carbon nanotubes and is used to determine the lower limit of the range of the device to be calibrated. When the gold powder ratio (mass fraction is 0), the reflectance is about 2%. The standard with a reflectance of 0.1% is prepared by processing carbon nanotube arrays.

[0062] Based on the above embodiment, as an optional embodiment, the plurality of first calibration units 100 and the plurality of second calibration units 200 are distributed in an array, including:

[0063] The plurality of first calibration units 100 are arranged in sequence according to the magnitude of the characteristic quantity values, and the second calibration units 200 and the arranged first calibration units 100 form an array shape.

[0064] Optionally, the characteristic values ​​corresponding to the plurality of first calibration units 100 increase or decrease.

[0065] Take a 3*3 rectangular arrangement as an example. Each unit has two value characteristics: reflectance and emissivity. The values ​​are arranged in gradients. For example, from top to bottom, from left to right, they decrease or increase in sequence. Assume that the reflectance of the upper left corner is 95%, the upper middle is 85%, the upper right is 75%, the left side of the second row is 65%, and the middle of the second row is 55%, arranged in sequence.

[0066] Figure 2 is a schematic diagram of the structure of the second calibration unit provided in an embodiment of the present invention; Figure 2 Based on the above embodiment, as an optional embodiment, the second coating and the third coating are fan-shaped, and the target pattern is circular.

[0067] Based on the above embodiment, as an optional embodiment, it also includes:

[0068] The substrate 300 is roughened and has the first calibration unit 100 and the second calibration unit 200 on its surface. After the first calibration unit 100 and the second calibration unit 200 are provided, the diameter of particles on the surface of the substrate 300 is 45 to 55 um.

[0069] The diameter of the particles on the surface after gold plating is preferably around 50um. The diameter of the particles sprayed on the sample surface is preferably around 50um.

[0070] In order to achieve the characteristic of being opaque, all standard devices need to be installed on the aluminum substrate 300. In order to increase adhesion, the aluminum substrate 300 needs to be roughened.

[0071] The present invention reduces two errors caused by excessively high blackbody emissivity and excessively low reflectance at the same spatial position, thereby greatly improving the temperature measurement accuracy.

[0072] The following is a description of the method for preparing the multi-parameter fusion standard provided by the present invention. The method for preparing the multi-parameter fusion standard described below and the multi-parameter fusion standard described above can be referenced to each other.

[0073] Figure 3 is a flow chart of a method for preparing a multi-parameter fusion standard provided by an embodiment of the present invention, referring to Figure 3 The present invention provides a method for preparing a multi-parameter fusion standard, which is used to prepare the multi-parameter fusion standard. The preparation method comprises:

[0074] S310, preparing a first coating, a second coating, and a third coating with set characteristic values;

[0075] S320, spraying the first coating onto the surface of the substrate in sequence according to a set order to obtain a plurality of first calibration units to calibrate characteristic linearity and characteristic range;

[0076] S330, spraying the second coating and the third coating alternately onto the surface of the substrate, the second coating and the third coating forming a target pattern, to obtain a second calibration unit, the second calibration unit and the first calibration unit being arranged in an array to calibrate a surface distribution measurement parameter;

[0077] The first coating has a plurality of characteristic values, and the characteristic value of the second coating is greater than that of the third coating.

[0078] As an embodiment, the first coating, the second coating and the third coating are all made by mixing materials in set proportions, so that the first calibration unit and the second calibration unit both have two characteristics of reflectance and emissivity.

[0079] As an embodiment, the reflectance and emissivity of the first calibration unit and the second calibration unit have spectral flatness, and the relative variation does not exceed 10% of their own values.

[0080] As an embodiment, the first coating, the second coating and the third coating are made by mixing gold powder and carbon powder in a set ratio, and the value of the reflectance is positively correlated with the content of the gold powder.

[0081] As an embodiment, it also includes:

[0082] The upper limit determination unit is made of pure gold powder to determine the upper limit of the range of the device to be calibrated;

[0083] A lower range limit determination unit is made of carbon nanotubes and is used to determine the lower range limit of the device to be calibrated.

[0084] As an embodiment, the plurality of first calibration units and the plurality of second calibration units are distributed in an array, including:

[0085] The plurality of first calibration units are arranged in sequence according to the magnitude of the characteristic quantity values, and the second calibration units and the arranged first calibration units form an array shape.

[0086] As an embodiment, the characteristic values ​​corresponding to the plurality of first calibration units increase or decrease.

[0087] As an embodiment, the second coating and the third coating are fan-shaped, and the target pattern is circular.

[0088] As an embodiment, it also includes:

[0089] The substrate is obtained through roughening processing, and the first calibration unit and the second calibration unit are arranged on the surface of the substrate; after the first calibration unit and the second calibration unit are arranged, the diameter of the particles on the surface of the substrate is 45-55um.

[0090] The invention provides a multi-parameter fusion infrared standard device, which has parameter characteristics such as infrared reflectance, emissivity and BRDF on the same surface.

[0091] The multi-parameter fusion infrared standard is arranged in an array on a large standard plate, and each unit has different reflectance and emissivity values.

[0092] This multi-parameter fusion infrared standard is mainly used to calibrate the artificial intelligence multi-parameter fusion perception temperature measurement device in the field of intelligent perception.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-parameter fusion standard, characterized in that: The invention comprises a plurality of first calibration units and a second calibration unit: The first calibration unit includes a first coating material for setting a characteristic value, which is used to calibrate the characteristic linearity and characteristic range; wherein each of the first calibration units corresponds to a different characteristic value; The second calibration unit includes a second coating and a third coating of set shapes and characteristic values, the second coating and the third coating alternately form a target pattern for calibrating surface distribution measurement parameters, wherein the characteristic value of the second coating is greater than that of the third coating; A plurality of the first calibration units and the second calibration units are distributed in an array.

2. The multi-parameter fusion standard according to claim 1, characterized in that: The first coating, the second coating and the third coating are all made by mixing materials in set proportions, so that the first calibration unit and the second calibration unit both have two characteristics of reflectance and emissivity.

3. The multi-parameter fusion standard according to claim 2, characterized in that: The reflectance and emissivity of the first calibration unit and the second calibration unit have spectral flatness, and the relative variation does not exceed 10% of their own magnitudes.

4. The multi-parameter fusion standard according to claim 2, characterized in that: The first coating, the second coating and the third coating are made by mixing gold powder and carbon powder according to a set ratio, and the value of the reflectance is positively correlated with the content of the gold powder.

5. The multi-parameter fusion standard according to claim 4, characterized in that: Also includes: The upper range limit determination unit is made of pure gold powder and is used to determine the upper range limit of the device to be calibrated; The lower range limit determination unit is made of carbon nanotubes and is used to determine the lower range limit of the device to be calibrated.

6. The multi-parameter fusion standard according to claim 1, characterized in that: The plurality of first calibration units and the plurality of second calibration units are distributed in an array, comprising: The plurality of first calibration units are arranged in sequence according to the magnitude of the characteristic quantity values, and the second calibration units and the arranged first calibration units form an array shape.

7. The multi-parameter fusion standard according to claim 6, characterized in that: The characteristic quantity values ​​corresponding to the plurality of first calibration units increase or decrease.

8. The multi-parameter fusion standard according to claim 1, characterized in that: The second coating material and the third coating material are in a fan shape, and the target pattern is in a circle.

9. The multi-parameter fusion standard according to claim 1, characterized in that: Also includes: A substrate, wherein the substrate is roughened and the first calibration unit and the second calibration unit are provided on the surface; After the first calibration unit and the second calibration unit are set, the diameter of the particles on the surface of the substrate is 45 to 55 um.

10. A method for preparing a multi-parameter fusion standard, characterized in that: For preparing the multi-parameter fusion standard according to any one of claims 1 to 9, the preparation method comprises: Prepare a first coating, a second coating, and a third coating with set characteristic values; Spraying the first coating onto the surface of the substrate in sequence according to a set order to obtain a plurality of first calibration units to calibrate characteristic linearity and characteristic range; Spraying the second coating and the third coating alternately onto the surface of the substrate, the second coating and the third coating form a target pattern to obtain a second calibration unit, the second calibration unit and the first calibration unit are arranged in an array to calibrate surface distribution measurement parameters; The first coating has a plurality of characteristic values, and the characteristic value of the second coating is greater than that of the third coating.

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