KR20200045436A - Planar heating test sheet and product testing apparatus using the same - Google Patents

Abstract

An object of the present invention is to provide a surface heating testing sheet comprising a heating pattern formed using a direct printing method on a portion which requires heating. Disclosed is a product testing apparatus using a transparent surface heating element. A product testing apparatus according to one embodiment of the present invention may comprise: a transfer unit transferring a testing targeted product; at least one surface heating testing sheet including a heating area for heating the product and a transparent testing area for testing the product; at least one reading unit testing the product through the transparent testing area; and a processor which controls the transfer unit, the surface heating testing sheet, and the reading unit. The heating area includes at least one heating wire, and some of the heating wires may be used as a reference wire for testing the product by the reading unit.

Description

Planar heating test sheet and product inspection device using the same {PLANAR HEATING TEST SHEET AND PRODUCT TESTING APPARATUS USING THE SAME}

The present invention relates to a surface heating test sheet and a product inspection device using the same, and more particularly, to a surface heating test sheet including a heating pattern formed using a direct printing method on a portion requiring heat and a product inspection device using the same It is about.

Heater equipment that uses heat is generally used for product inspection and manufacturing processes. Such heater equipment may have a replacement cycle depending on the period of use, and a high replacement cost must be paid for maintenance of the heater. In addition, when a transparent heater is used in the inspection and manufacturing process, there is a problem that it is not easy to be applied to the industry due to the high price of the transparent heater.

In addition, the conventional conventional heater equipment was heated to a temperature required for the chamber using a heater to maintain the chamber temperature in a certain space, and the inspection device is used for inspection by combining with a vision system using a separate inspection means. Was performed. Therefore, in the conventional inspection device, the inspection area for inspecting the heating device and the product is separated into separate parts.

This existing technology has many limitations as follows.

First, it takes a lot of time to heat up to a required temperature by heating a heating device for heating the product and a separate chamber, and a lot of energy is consumed to maintain the chamber space at a constant temperature.

Second, the inspection window for inspecting the product and the heating device are separated, so the structure is complicated, and the optimal and constituent material cost is consumed.

Third, it is difficult to maintain uniformity of the entire chamber in terms of temperature for heating the product, and it takes a lot of inspection time to confirm this, and a separate temperature control device is required.

Fourth, the existing technology has an inspection-oriented structure and is not suitable for devices for continuous inspection and total inspection.

Fifth, the prior art is limited to the inspection of unit products, and thus many inspection devices must be provided for mass production.

An object of the present invention for solving the above problems is to provide a planar heating test sheet including a heating pattern formed using a direct printing method on a portion requiring heating.

Another object of the present invention for solving the above problems is to provide a product inspection device using the surface heat test sheet.

Product inspection device according to an embodiment of the present invention for achieving the above object, the transfer unit for transferring the product to be inspected; At least one planar heating test sheet including a heating area for heating the product and a transparent inspection area for inspecting the product; At least one reading unit for inspecting a product through the transparent inspection area; And it may include a processor for controlling the transfer unit, the surface heat test sheet, and the reading unit.

At this time, the heating region includes one or more heating wires, and some of the heating wires may be used as a reference line for inspecting the product by the reading unit.

The planar fever test sheet may be located between the product and the reading unit on a vertical line with respect to the ground surface.

The heating wire includes a first heating unit; A second heating unit parallel to the first heating unit; And a third heat generating part connecting the first heat generating part and the second heat generating part.

The transparent inspection area may be formed between the first heating part and the second heating part.

The product inspection device may further include a transparent insulating layer covering the planar heating test sheet, a temperature sensing unit sensing the temperature of the planar heating test sheet, and a driving unit driving the transfer unit.

The number of the surface heat test sheet and the number of the reading unit may be configured identically. The reading unit may be disposed at at least one of the top of the planar fever test sheet and the bottom of the planar fever test sheet.

The surface heat test sheet according to an embodiment of the present invention for achieving the other object is a surface heat test sheet used for product inspection, a transparent substrate; A heating layer formed on the transparent substrate; A transparent insulating layer covering the heating layer; And a power supply for supplying electrical energy to the heating layer, the heating layer including one or more heating wires, and some of the heating wires may be used as a reference line for inspecting the product by the reading unit.

A product inspection area may be formed between the first heating part and the second heating part.

The heating wire includes a first heating unit; A second heating unit parallel to the first heating unit; And a third heat generating part connecting the first heat generating part and the second heat generating part.

The transparent inspection area may be formed between the first heating part and the second heating part.

The transparent substrate may be formed of a material including at least one of glass, PET (polyethylene terephthalate), CPI (colorless polyimide), PE PE (polyethylene), PTFE (polytetrafluoroethylene), and transparent plastic.

The heating layer may include at least one heating region in which the density of the heating wire is formed higher than other regions.

The heating layer may also include a plurality of inspection regions formed due to the shape of one or more heating wires.

The heating wire may be formed by curing the heating ink after being printed on the transparent substrate.

According to the inspection apparatus provided with the heating element of the present invention, it is possible to reduce the high replacement cost of the heater by using the surface heating element that is easy to replace in the inspection and manufacturing process.

In addition, the present invention may also apply a transparent and uniform heater to inspect all products, not to inspect the product, thereby increasing the quality and speeding up the inspection.

In addition, it is possible to inspect in a production process that has high productivity and is easy to maintain in the manufacturing process.

The surface heating type of the patterning method according to the present invention can serve as a heater in which a transparent area exists, and the temperature is more uniform than that of a conventional ship, and is easily configured for replacement, so it can be easily replaced in the inspection and manufacturing process. The losses in the process can be minimized.

1 is a configuration diagram of a product inspection device according to an embodiment of the present invention.
2 is a configuration diagram of a product inspection device according to another embodiment of the present invention.
3 is a configuration diagram of a product inspection device according to another embodiment of the present invention.
Figure 4a is a cross-sectional view of the planar heating test sheet according to an embodiment of the present invention, Figure 4b is a cross-sectional view including a temperature sensor and a sensor electrode of the planar heating test sheet according to an embodiment of the present invention.
5 is a cross-sectional view of a planar fever test sheet according to another embodiment of the present invention.
6A is a cross-sectional view of a planar fever test sheet according to another embodiment of the present invention, and FIG. 6B is a side cross-sectional view of a planar fever test sheet according to another embodiment of the present invention.
7 is a flowchart of a method of manufacturing an inspection apparatus according to an embodiment of the present invention.
8 is a flowchart of a method for manufacturing a planar fever test sheet according to an embodiment of the present invention.
9 is a cross-sectional view of a planar fever test sheet according to another embodiment of the present invention.
10 is a view showing the results of temperature measurement at various positions of the transparent surface heating element according to an embodiment of the present invention.
11 is a view showing a temperature increase region of a glass heater unit according to an embodiment of the present invention.
12 is a graph showing the temperature difference according to the presence or absence of heat insulation according to an embodiment of the present invention.
13 is a block diagram of a product inspection apparatus according to an embodiment of the present invention.

The present invention can be applied to various changes and may have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term "and / or" includes a combination of a plurality of related described items or any one of a plurality of related described items.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "include" or "have" are intended to indicate the presence of features, numbers, steps, actions, components, parts or combinations thereof described herein, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the overall understanding in describing the present invention, the same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the manufacturing process, transparent and uniform heaters are required for automatic inspection in connection with automation. Therefore, an inspection apparatus capable of checking a heat treatment state and an array level of a heating unit in a heating process while heating a product using one or more transparent and uniform heaters is required.

Accordingly, the present invention is to provide an apparatus for forming a heating pattern using a direct printing method on a portion requiring heat, and inspecting the non-printed portion.

More specifically, the present invention is provided with an inspection window so that parts and products can be inspected while being transferred onto a transparent area by supplying electric energy to the patterned part through direct printing to generate heat in the unit that requires heat. It relates to a product inspection device.

1 is a configuration diagram of a product inspection device according to an embodiment of the present invention.

In accordance with an embodiment of the present invention, a device for inspecting deformity is a surface heating test having a transfer section 10 for transferring a product to a heating area or a test reading area, a heating area for heating the product, and an inspection area for inspecting the product. Sheet 20, a reading unit 30 for inspecting a product through an inspection area of the planar heating test sheet, a driving unit 40 for driving the transport unit, a power supply unit for supplying the power, the transport unit, the driving unit, and reading A control unit 60 for controlling a system such as a power unit and a power unit may be included. The inspection sheet may include a heating layer formed on the substrate of the transparent body, and the heating layer may serve as a reference line for inspection of the reading unit.

Referring to FIG. 1, the driving unit 40 operates the product transport unit 10 to move the product fixing jig 13 in the A direction. As the product fixing jig 13 moves, the surface heating test sheet 20 that generates heat at the time when the inspection area 12 of the inspection object 11 is placed on the same line perpendicularly to the reading unit 30 is fixed to the product fixing jig ( 13) and the reading unit (30).

The planar heating test sheet 20 may include a transparent substrate 21, a power terminal 22, and a heating wire 23. The transparent substrate 21 may be made of glass having high transmittance and high heat resistance. In addition, the power supply terminal 22 and the heating wire 23 may be implemented by a printing method or an etching method, and adhere to a transparent substrate to perform a heating function.

The product transfer section 10 is a roller conveyor, belt conveyor, lift, x-axis or y-axis or z-axis used for transportation of various products. Refers to the device.

The reading unit 30 may be composed of an optical camera to judge defects and good products, and may be configured to read an important inspection area of the product by observing color, transmittance, temperature, angle, and the like. The reading unit may also perform a test to test after heating by performing aging of the product, and may perform a test to test during the aging test of the product. At this time, the test item to be inspected may be an electrical signal output such as a power value, a resistance value, a current value, and a withstand voltage value measured while supplying voltage to each electrode of the product.

The planar heating test sheet 20 may be made of glass, which is a transparent substrate 21. As the glass, general glass, tempered glass, ceramic glass, or the like may be used depending on the heat resistance.

The heating wires on the planar heating test sheet 20 may include one or more heating wires separated from each other, and include two or more heating wires formed parallel to each other at an arbitrary position with respect to one axis on one side. It may be configured in a connected form. Therefore, the area between the two heating wires according to the present extinction may constitute an inspection window, and the area between the two heating wires may be an area for simultaneously inspecting the heating of the product.

The planar heating test sheet according to the present invention is to adjust the wire line according to the arrangement in the inspection device, it can be individually controlled with a separate part from the driving unit.

Here, the heating wire may be made of a metal alone or an alloy, and the ink form may be configured in a printing and coating form. Further, the heating wire may be located on the surface of the transparent substrate in a direction close to the product to be transferred, or may be located in the opposite direction. Theoretically, if the heating part is located in a direction close to the product, efficiency may be good, but since the insulation part is generally formed on the heating part to protect the heating layer, the efficiency is not greatly influenced by the installation direction of the heating wire.

The results related to this can be confirmed through an experiment as shown in FIG. 10. When the insulating layer is formed on the heating wire, the surface temperature of the transparent substrate on the opposite side of the heating part rises about 10 to 15 degrees. Therefore, it can be seen that if the insulating layer is formed on the surface of the heating unit in order to prevent external shock or oxidation damage of the heating unit, the position is not significantly different.

The heating unit and the power terminal unit may be printed on the test sheet with the same material, or the heating unit may be made of a high-resistance material according to the amount of heat and temperature. As the material of the heating element, one or more metal / carbon / inorganic oxides may be used. As the material of the power terminal, one or more metals may be used.

In this embodiment, the heating wire is printed in a straight line to form a parallel inspection window. This is to ensure that the product is transferred based on the inspection line, and that the heating line is provided so as to generate heat only around the area where the product is heated, so that the inspection window can be uniformly heated by supplying a low-power DC voltage. In general, when the inspection window is small or short, the DC voltage is advantageous, and when the inspection window is large or long, the AC voltage is easy, but the scope of the present invention is not limited to this implementation.

The power terminal 22 is an electrode that is bonded to the glass and is connected to a power supply line of the power 60.

The driving unit 40 may control the product transport unit 10 to control the transport speed and position of the product, or to align the inspection area 12 of the product with the array.

The control and power supply unit 60 may control the temperature of heat generation.

The driving unit 40 and the control unit 60 control heat treatment time and temperature, respectively, and are related to the processing speed of the reading unit 30 as an important control part in the production process.

2 is a configuration diagram of a product inspection device according to another embodiment of the present invention.

The embodiment shown in FIG. 2 is a case where two or more inspection regions of the inspection apparatus are configured. In the embodiment shown in Figure 2 includes a plurality of transparent inspection sheets (200, 210), each sheet includes a separate inspection area. Accordingly, separate reading units exist for each inspection area, and a plurality of reading units are provided on the entire device side. When the inspection apparatus according to the present embodiment is used, inspection efficiency and productivity per unit time can be increased.

Here, the inspection sheet may be installed in the same direction or orthogonal to the direction of the product. For example, although not illustrated in FIG. 2, a plurality of transparent heating elements may be arranged in a direction in which the product is moved, and the product may be divided into a region for heating the product at a required temperature and a region for simultaneously performing heating and reading. Alternatively, as shown in FIG. 2, heating may be performed in advance through planar heating in the longitudinal direction, and the reading unit may simultaneously perform heating and reading.

3 is a configuration diagram of a product inspection device according to another embodiment of the present invention.

The inspection apparatus according to the embodiment shown in FIG. 3 is characterized in that the reading unit is configured on both sides.

That is, the present embodiment has a structure that allows inspection of the product by installing the readers on both sides of the vertical direction perpendicular to the direction of the product in the case where the inspection of the double-sided part is required according to the product to be inspected. . In some cases, although the reading unit is not illustrated, it may be located in a direction opposite to the heating unit. That is, when the part of the product requiring heating is upper and the part requiring inspection is in the opposite direction, the position of the heating element on the transparent surface and the reading part may be located in the opposite direction.

Figure 4a is a cross-sectional view of the planar heating sheet according to an embodiment of the present invention.

Referring to Figure 4a, the planar heating sheet according to an embodiment of the present invention includes a first heating unit 25 and a second heating unit 26 formed in parallel with the second heating unit 26. Each heating unit is formed to be connected to the power terminal 22 to receive power. The first heating unit 25 and the second heating unit 26 are connected through a third heating unit 231.

The inspection window is formed due to the shape of the first heating unit 25, the second heating unit 26, and the third heating unit 231. The inspection window may be defined as an area between the first heating part 25 and the second heating part 26 of the heating wire 23. The heating temperature of the inspection window can be appropriately set by adjusting the supply voltage at the control unit or adjusting the resistance of the heater according to the product process. That is, the inspection window 24 is located between the first heating part and the second heating part, and the first and second heating parts can serve as a reference line for the product to be easily seen.

The inspection reference line 27 may be provided in a direction parallel to or perpendicular to the transport direction of the product, and the shape may be applied without being restricted to the shape shown in FIG. 4A. Therefore, in the present invention, either one of the first heating unit 25 or the second heating unit 26 is configured in a straight shape to serve as an inspection reference line, and the other is configured to increase the heating area by forming a curved shape. It might be. In addition, a third heating unit is provided between the first heating unit and the second heating unit, and the third heating unit may be shorter than the first or second heating unit.

Figure 4b is a cross-sectional view including a temperature sensor and a sensor electrode portion of the planar heating test sheet according to an embodiment of the present invention.

Referring to FIG. 4B, a heating wire including a first heating unit 25, a second heating unit 26, and a third heating unit 231 and a power terminal unit connected thereto are positioned on a transparent substrate, and the heating wire 23 ) Is covered with a transparent insulating layer 28. Here, the transparent substrate 21 may be made of transparent glass or plastic.

PET, CPI (transparent PI, Kolon Corporation), PE, PTFE, etc. can be used for the film, and in the case of injection type, a transparent plastic substrate such as PC and PMMA can also be configured.

5 is a cross-sectional view of a planar fever test sheet according to another embodiment of the present invention.

The planar heating test sheet according to another embodiment of the present invention may include a heating layer formed on the transparent substrate 21, and the heating layer is parallel to the first heating unit 25 and the second heating unit 26. The second heating unit 26 is formed, and may further include a temperature sensor 51 and a sensor electrode unit 52.

The temperature sensor 51 may be installed in contact with the heating wire according to the inspection area to measure temperature. In the case of a contact-type temperature sensor, temperature deviation occurs depending on the device and parts to be fixed, so it is necessary to measure in the same material and constant environment. In the present invention, in order to reduce such measurement error, an inspection sheet in which a temperature sensor is attached to a layer such as a heating wire is provided. The temperature sensor can determine the measurement interval and the measurement site according to the required characteristics. In addition, it is possible to additionally measure the heating temperature of the front surface using an image camera.

For the experiment related to the present invention, a heating element having 3.7 and 4.1 ohms was made, and a heater that reached an average temperature of 200 degrees was manufactured by applying a DC voltage of 24V. When the resistance was 3.7 ohms, the average temperature was 10 degrees higher than that of 4.1 ohms, and it was possible to provide heat at a slightly higher temperature in transferring heat to the product. The lower the resistance, the higher the current value that flows and the temperature rises. As the product is transferred to the inspection device, the temperature is changed as heat is transferred and lost. Suitable for supply systems.

When printing the heating element, the temperature sensor 51 and the sensor electrode portion 52 are formed in a printing pattern at the same time, and the temperature sensor and the electrode portion can be configured as a resistor, and the resistance can be printed using other materials. Alternatively, a resistance chip for a sensor may be bonded to a temperature sensor site, and a resistance chip may be bonded to the temperature measurement site with an adhesive.

In the case of a printed pattern, a resistance different from that of the heating element can be formed, and the resistance of this electrode decreases as the temperature rises, or a method of realizing the temperature by sensing the change in resistance at the electrode part using the property of increasing Can be used.

6A is a cross-sectional view of a planar fever test sheet according to another embodiment of the present invention, and FIG. 6B is a cross-sectional side view of a planar fever test sheet according to another embodiment of the present invention.

 6A and 6B are examples in which electrodes are disposed on both ends and a transparent conductive layer 200 is formed between the electrodes to increase the area of the inspection window and the heating area. In this embodiment, the conductive layer 200 may be an inspection window and a heating unit, and an outline of the conductive layer may be an inspection reference line.

Here, the positive electrode and the negative electrode of the power supply terminal 22 are configured to be formed on both sides of the edge of the inspection window to uniformly supply voltage to the transparent conductive layer. At this time, the electrode layer 200 used can heat the entire area of the inspection window uniformly as conductivity increases. This is because the smaller the resistance is generated in the electrode, which is the part that supplies the voltage, the less the current flows and the less heat generated. Conductive materials that can be used as a transparent heating layer in the present invention include inorganic material (ITO, ZnO) deposition / coating, conductive polymer (PEDOT-PSS, PANI) coating, metal nanowire (AgNW, GuNW) coating, metal mesh (Ag, Cu) and the like. Therefore, in this embodiment, since the inspection window becomes the end line of the substrate, the inspection area can be used as much as the size of the inspection window, thereby increasing the inspection area.

7 is a flowchart of a method of manufacturing an inspection apparatus according to an embodiment of the present invention.

Referring to FIG. 7, in the manufacturing method of the auditing apparatus according to an embodiment of the present invention, after setting a transport direction of a product (S710), a distance between an inspection area and a heater unit is set (S720).

Thereafter, the heating time and temperature of the inspected product are set (S730), and a heating element suitable for the inspection line and temperature is applied (S740). When a heating element is applied, power is applied to the heating element (S750), and the temperature is measured, inspected, and adjusted through a reading unit (S760). Thereafter, the manufacturing of the inspection device is completed through the final inspection (S770).

8 is a flowchart of a method for manufacturing a planar fever test sheet according to an embodiment of the present invention.

Referring to FIG. 8, a method for manufacturing a surface heat test sheet according to an embodiment of the present invention may include the following eight steps.

First, a transparent substrate is cut according to a desired sheet size (S810). Thereafter, a heating ink constituting the heating wire is manufactured (S820). When the production of the heat-generating ink is completed, the heat-generating ink is printed on the transparent substrate and then cured (S830). Heat resistance of the printed and cured heating wire is heat-treated to match the resistance of the heating element (S840). Thereafter, insulation coating and printing / curing are performed on the heating wire (S850). Thereafter, a wire is connected to the terminal (S860), a molding process is performed on the connection (S870), and a connector socket retainer is coupled to the wire (S880) to complete.

In this way, in the present invention, in manufacturing a transparent heating element, a transparent substrate is cut and a power supply terminal portion and a heating wire are simultaneously screen-printed with a heating ink to be implemented. In addition, it is fired at a high temperature and adhered without a separate bonding process, insulating coating and printing are performed on the heat-generated heating element, and heat-treated to provide a transparent insulating layer.

At this time, the transparent insulating layer used may be an insulating material that does not change color or break even at a heating temperature, and is transparent and improves heat resistance by using a silicon-based material. The terminal part does not have a transparent insulation treatment, and after connecting with a wire by a method such as soldering or crimping, it is easy to insulate regardless of transparency and harden using a molding agent to realize stronger terminal strength.

9 is a cross-sectional view of a planar fever test sheet according to another embodiment of the present invention.

In the embodiment illustrated in FIG. 9, the planar fever test sheet includes two or more test windows instead of one.

Referring to FIG. 9, a first inspection window is positioned between the first heating unit 25 and the second heating unit 26, which are parts that apply heat to the product. In addition, a second inspection window is positioned between the fifth heating unit 251 and the sixth heating unit 261. The fifth heating unit 251 and the sixth heating unit 261 are connected through the seventh heating unit 271, and the second heating unit 26 and the fifth heating unit 251 are the fourth heating unit 241 ). In addition, the fifth heating unit 251 is electrically connected to the sixth heating unit 261.

That is, the embodiment illustrated in FIG. 9 is an embodiment of a transparent surface heating element that forms a plurality of heating units and an inspection window through one power supply unit. Therefore, it is possible to perform heating and inspection for products transferred in parallel through each heating unit and inspection window in one inspection sheet through visual inspection or a plurality of reading units. This embodiment can be realized by using a single power supply for the transparent heating element, and thus has an effect of reducing cost.

10 is a view showing the results of temperature measurement at various positions of the transparent surface heating element according to an embodiment of the present invention.

As shown in FIG. 10, when measuring the temperature distribution along the heating part of the heating element on the transparent surface, temperature deviation generally occurs. Particularly, both ends of the heating part are generally lower in temperature than the central part. When heating the product as in the present invention, the effective area must be set, but in the concept of fool proof, there is a large deviation in setting the effective area freely. It is necessary to reduce the deviation and set the effective area freely.

11 is a view showing a temperature increase region of a glass heater unit according to an embodiment of the present invention.

The embodiment shown in FIG. 11 is a case where a heating zone is formed in a region where the temperature is low by using a pattern of a heating unit using an area density, a difference in material, or a volume density.

Referring to FIG. 11, in the present invention, by heating a heating zone by forming a heating zone by concentrating a heating wire in the attention of an inspection area requiring an existing straight pattern, an attempt is made to maintain a uniform temperature distribution of the heating unit. In this embodiment, the temperature rising region is two regions shown in FIG. 11, but may be applied to more regions or applied to the entire region. Therefore, a region with a lower temperature is used as a heating region to maintain a more uniform temperature distribution in the heating region.

12 is a graph showing the temperature difference according to the presence or absence of heat insulation according to an embodiment of the present invention.

The sheet utilized in the experiment of FIG. 12 is a type in which a heater is formed on a substrate and a temperature sensor is attached on a surface opposite to the surface of the substrate on which the heater is formed. When the insulation is applied to the sheet of this type and when the insulation is not applied, the temperature measured by the temperature sensor can be confirmed graphically.

Referring to FIG. 12, it can be confirmed that the temperature in which the heat insulating material is present is considerably higher than that in the case where the heat insulating material is not present.

13 is a block diagram of a product inspection apparatus according to an embodiment of the present invention.

The product inspection apparatus 1000 using a transparent planar heating element according to an embodiment of the present invention includes a planar heating test sheet 1020 having a heating area for heating a product and an inspection area for inspecting a product, and the planar heating test It may include a reading unit 1010 for inspecting the product through the inspection area of the sheet, a power supply unit 1040 for supplying the power, a processor 1030 for controlling the system, such as the reading unit and power supply unit, wherein: The inspection sheet is formed by including a heating layer on a substrate of a transparent body, and the heating layer may serve as a reference line for inspection of the reading unit.

The product inspection apparatus 1000 may further include a transport unit for transporting the product to a heating area or an inspection reading area, and a driving unit for driving the transport unit.

Here, the test sheet may be composed of a plurality of heating wires, and at least one heating wire may serve as a reference line for inspection reading.

Here, the inspection area may be located between the heating lines of the inspection sheet.

Here, the heating layer of the inspection sheet may be formed in a transport direction or an orthogonal direction of the product, and may be located in a direction opposite to the product with respect to the transparent substrate.

Here, the inspection sheet may include a transparent insulating layer on the heating wire to protect the heating wire and insulate.

Here, the inspection sheet and the reading unit may be located in the same direction of the upper side with respect to the surface to which the product is transferred.

An inspection apparatus using a transparent planar heating element according to another embodiment of the present invention may further include a temperature sensing unit for sensing the temperature of the planar heating test sheet.

Here, the temperature sensing unit may be located on the same surface of the heating layer and the transparent substrate.

Here, the temperature sensing unit may be electrically connected to the heating layer to sense the temperature according to the resistance change.

An inspection apparatus using a transparent planar heating element according to another embodiment of the present invention may include a plurality of planar heating test sheets, and in this case, a plurality of reading units. That is, the inspection sheet and the reading unit may be matched 1: 1 to have the same quantity.

In an inspection apparatus using a transparent planar heating element according to another embodiment of the present invention, the inspection sheet and the reading unit may be positioned in opposite directions to the product.

In addition, the multi-purpose transparent planar heating element according to an embodiment of the present invention may be provided as a transparent substrate, a heating layer for heating, a power supply unit for supplying electrical energy to the heating layer, and a transparent inspection area for inspection. Is located in the area where the heating layer is formed, and the heating layer may be provided to serve as a reference line for the inspection area.

Here, glass, PET (polyethylene terephthalate), CPI (colorless Polyimide) (transparent PI, Kolon Corporation), PE (polyethylene), PTFE (Polytetrafluoroethylene), etc. may be used for the transparent substrate, and PC (Polycarbonate) for injection type, It may be formed of a transparent plastic material such as PMMA (Poly (methyl methacrylate)).

Here, a plurality of inspection areas may be formed on one transparent planar heating element.

Here, the heating layers forming the plurality of inspection areas may be electrically connected to receive electrical energy from a power supply unit formed on the same transparent surface heating element.

Here, the power supply parts of the heating element on the transparent surface are located at both ends facing each other, and a heating layer is formed between the two power supply parts to increase the heating area and the inspection area.

Here, the material used for the heating layer is a single or composite material selected from inorganic materials (ITO, ZnO), conductive polymers (PEDOT-PSS, PANI), metal nanowires (AgNW, GuNW), and metal meshes (Ag, Cu). Can be configured.

Here, in order to maintain a uniform temperature distribution of the heating unit, a heating zone may be formed using a pattern density in a certain region of the heating unit.

Here, the temperature increase region may be at least one.

Although described above with reference to preferred embodiments of the present invention, those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can understand that you can.

The operation of the method according to an embodiment of the present invention can be implemented as a computer-readable program or code on a computer-readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data readable by a computer system is stored. In addition, the computer readable recording medium may be distributed over network coupled computer systems so that the computer readable program or code is stored and executed in a distributed manner.

In addition, the computer-readable recording medium may include a hardware device specially configured to store and execute program instructions, such as a ROM, a RAM, and a flash memory. Program instructions may include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine code such as that produced by a compiler.

Although described above with reference to preferred embodiments of the present invention, those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can understand that you can.

Claims (18)

A transfer unit for transferring the product to be inspected;
At least one planar heating test sheet including a heating area for heating the product and a transparent inspection area for inspecting the product;
At least one reading unit for inspecting a product through the transparent inspection area; And
It includes a processor for controlling the transfer unit, the surface heat test sheet, and the reading unit,
The heating area includes one or more heating wires, and some of the heating wires are used as reference lines for inspecting the product by the reading unit. The method according to claim 1,
The planar fever test sheet,
A product inspection device positioned between the product and the reading portion on a vertical line with respect to the ground surface. The method according to claim 1,
The heating wire
A first heating unit;
A second heating unit parallel to the first heating unit; And
And a third heating part connecting the first heating part and the second heating part. The method according to claim 3,
The transparent inspection area is formed between the first heating portion and the second heating portion, the product inspection device. The method according to claim 1,
A product inspection device further comprising a transparent insulating layer covering the planar heat test sheet. The method according to claim 1,
Product inspection device further comprising a temperature sensing unit for sensing the temperature of the planar heating test sheet. The method according to claim 1,
Further comprising a driving unit for driving the transfer unit, the product inspection device. The method according to claim 1,
The number of the surface heat test sheet and the number of the reading unit are configured the same, product inspection device. The method according to claim 1,
The reading unit is disposed on at least one of the top of the planar fever test sheet and the planar fever test sheet, the product inspection device. As a surface heat test sheet used for product inspection,
Transparent substrates;
A heating layer formed on the transparent substrate;
A transparent insulating layer covering the heating layer; And
It includes a power supply for supplying electrical energy to the heating layer,
The heating layer includes one or more heating wires, and some of the heating wires are used as a reference line for inspecting a product by a reader, an area heating test sheet. The method according to claim 10,
The heating wire,
A first heating unit;
A second heating unit parallel to the first heating unit; And
A planar heat generation test sheet comprising a third heating unit connecting the first heating unit and the second heating unit. The method according to claim 11,
A surface heating test sheet, in which a product inspection area is formed between the first heating part and the second heating part. The method according to claim 10,
A surface heating test sheet comprising a temperature sensing unit sensing the temperature of the heating wire in the heating layer. The method according to claim 10,
The transparent substrate,
Surface heat test sheet formed of a material comprising at least one of glass, PET (polyethylene terephthalate), CPI (colorless polyimide), PE PE (polyethylene), PTFE (polytetrafluoroethylene), and transparent plastic. The method according to claim 10,
The heating layer includes at least one heating zone formed to have a higher density of the heating wire than other areas, a planar heating test sheet. The method according to claim 10,
The heating layer includes a plurality of inspection areas formed due to the shape of one or more heating wires, a planar heating test sheet. The method according to claim 10,
The heating wire is formed by curing after heating ink is printed on the transparent substrate, the surface heating test sheet. The method according to claim 10,
The heating layer is formed of an inorganic material, a conductive polymer, a metal nanowire, and a single or composite material selected from a metal mesh, an area heating test sheet.

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