KR102633690B1 - Device for preventing human error when detecting defective parts - Google Patents

Abstract

According to an embodiment of the present disclosure, in a system capable of determining whether a component of an internal circuit of an electric rice cooker is defective, the internal circuit of the electric rice cooker may include a resistor unit, a microcomputer, and a sensor unit. The sensor unit, the resistor unit, and the microcomputer are sequentially electrically connected in that order, and a first point indicating an inspection point for checking whether the internal circuit is defective may be located between the microcomputer and the resistor unit. there is. The inspection device for determining whether a component of the internal circuit of the electric rice cooker is defective includes a buzzer, a first toggle switch, a second toggle switch, and electrically connected to the buzzer, the first toggle switch, and the second toggle switch. It may include a control unit. The first point and the sensor unit of the internal circuit are respectively connected to a portion of the first toggle switch and a portion of the second toggle switch of the inspection device, and when the inspection device is turned on, the control unit determines whether the voltage value of the first point is less than or equal to a specified value, and if the voltage value of the first point exceeds the specified value, determines that the internal circuit is normal, and determines that the voltage value of the first point is If the value is below the specified value, a sound can be output through the buzzer.

Description

Device to prevent human error when detecting defective parts {DEVICE FOR PREVENTING HUMAN ERROR WHEN DETECTING DEFECTIVE PARTS}

The present disclosure relates to a device for preventing human error when detecting defective parts, and more specifically, to a method for reducing the error rate of an inspector when detecting defective parts inside a rice cooker.

In general, the operation of an electric rice cooker largely includes a cooking process that performs an operation to turn rice into rice, and a warming process that preserves the rice cooked by the cooking process at a certain temperature.

In particular, during the cooking process, the user puts rice and water into the inner pot of the electric rice cooker and presses the cook key to start cooking. And while cooking is in progress, the electric rice cooker can generate heat through the voltage applied to the coil of the inner pot, and transfer the generated heat to the inner pot to cook rice and make rice.

In addition, the electric rice cooker can detect the temperature (heat) of the inner pot through a sensor attached below the inner pot while cooking, and the detected temperature (heat) is recognized by the microcomputer to adjust the temperature (heat) of the inner pot. You can.

Controlling the temperature (heat) of the inner pot during the cooking process of an electric rice cooker is an important part of the user's safety.

Meanwhile, when a specific circuit component (resistor) in the rice cooker circuit is not inserted or the lead weld part is removed, the sense voltage value input to the microcomputer may be fixed at 0.1V. Because the sense voltage value is fixed, the microcomputer cannot perform voltage control through the coil of the inner pot, and as a result, the temperature (heat) of the inner pot remains heated continuously, which may cause a fire.

In other words, if a component (resistor) is defective, an incorrect HEXA value is displayed in the DP window when inspecting the control PCB, so the inspector can recognize the defect. However, since it relies on the inspector's vision, it must be confirmed with the inspector's eyes. Because there are so many items, inspectors often do not recognize defects.

The present invention was created to solve the problems inherent in the prior art as described above. The purpose of the present invention is to monitor changes in the voltage of the internal circuit of the electric rice cooker and when the value of the detected voltage falls below a specified value. , the aim is to provide an inspection method and a defect detection device that enable the inspector to immediately detect product defects auditorily by making a sound sound through a buzzer.

The present invention is equipped to solve the problems inherent in the prior art as described above. The purpose of the present invention is to determine whether the internal circuit of the electric rice cooker is defective by enlarging and outputting the defective location of the internal circuit. The aim is to provide a method and defect detection device that allows an inspector to easily visually determine true defects and false defects by enlarging the location and confirming the defect location from the side or various angles.

Various embodiments disclosed in this document can provide methods and devices for solving the above-described problems.

According to an embodiment of the present disclosure, in a system capable of determining whether a component of an internal circuit of an electric rice cooker is defective, the internal circuit of the electric rice cooker may include a resistor unit, a microcomputer, and a sensor unit. The sensor unit, the resistor unit, and the microcomputer are sequentially electrically connected in that order, and a first point indicating an inspection point for checking whether the internal circuit is defective may be located between the microcomputer and the resistor unit. there is. The inspection device for determining whether a component of the internal circuit of the electric rice cooker is defective includes a buzzer, a first toggle switch, a second toggle switch, and electrically connected to the buzzer, the first toggle switch, and the second toggle switch. It may include a control unit. The first point and the sensor unit of the internal circuit are respectively connected to a portion of the first toggle switch and a portion of the second toggle switch of the inspection device, and when the inspection device is turned on, the control unit determines whether the voltage value of the first point is less than or equal to a specified value, and if the voltage value of the first point exceeds the specified value, determines that the internal circuit is normal, and determines that the voltage value of the first point is If the value is below the specified value, a sound can be output through the buzzer.

According to an embodiment of the present disclosure, the first point of the internal circuit and the sensor unit are connected to a portion of the first toggle switch and a portion of the second toggle switch of the inspection device, respectively, and the sensor unit The resistance value may be 4.7K ohm.

According to one embodiment of the present disclosure, the specified value may be 0.5V.

According to an embodiment of the present disclosure, the inspection device may further include a microscope unit, an angle adjusting unit, a moving unit, and a seating unit, and the control unit electrically connects the microscope unit, the angle adjusting unit, and the moving unit. It can be connected to . In a state in which the internal circuit is seated on the seating unit, the control unit uses the moving unit to draw a raster pattern of the external appearance of the internal circuit through the microscope unit and captures an image of the first point. Based on the captured image, it can be determined whether the internal circuit is defective.

According to an embodiment of the present disclosure, the operation of taking an image about the first point includes an operation of adjusting the angle through the angle adjuster and taking an image, and the captured image is enlarged about the first point. This image can refer to an optical image.

According to an embodiment of the present disclosure, the operation of capturing the image may have a frame rate of 24fps, 25fps, 30fps, or 60fps.

According to an embodiment of the present disclosure, the control unit inputs the captured image of the first point into an artificial intelligence model, and based on the pattern of brightness, contrast, and roughness of the first point, the first point It is possible to determine whether a branch is defective and the type of defect.

When inspecting defective parts (resistors) of an electric rice cooker, if there are many items that must be checked with the inspector's eyes, the visual inspection method that relies on the inspector's vision is changed to the inspector's auditory inspection method using the buzzer of the inspection jig, so that the component When inspecting defects, the number of cases where the inspector does not recognize the defect can be dramatically reduced.

When inspecting defective parts of an electric rice cooker, the cases where the inspector does not recognize a defect can be dramatically reduced by magnifying the parts that must be checked with the inspector's eyes through a microscope.

When inspecting defective parts of an electric rice cooker, the images captured and collected through the microscope are processed through an artificial intelligence model to determine whether a part is defective with high accuracy and quickly, thereby dramatically reducing the inspector's fatigue when inspecting defective parts.

In addition, various effects that can be directly or indirectly realized through the present disclosure can be provided.

1 is a block diagram showing the configuration of a general electric rice cooker according to an embodiment.
Figure 2 is a diagram showing a circuit inside an electric rice cooker according to an embodiment.
3 is a circuit diagram showing a defect inspection method according to an embodiment.
Figure 4 is a flowchart showing a defect inspection method according to an embodiment.
In relation to the description of the drawings, identical or similar reference numerals may be used for identical or similar components.

Hereinafter, various embodiments of the present invention are described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include various modifications, equivalents, and/or alternatives to the embodiments of the present invention.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary. In addition, terms such as "... unit", "... unit", and "module" used in the specification refer to a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software. there is.

In this document, expressions such as “have,” “may have,” “includes,” or “may include” refer to the relevant features (e.g., numerical values, functions, operations, or components such as parts). Indicates presence and does not exclude the presence of additional features.

In this document, expressions such as “A or B, “at least one of A or/and B,” or “one or more of A or/and B” may include all possible combinations of the items listed together. For example, “A or B”, “at least one of A and B”, or “at least one of A or B” (1) includes at least one A, (2) includes at least one B, or (3) it may refer to all cases including both at least one A and at least one B.

As used herein, expressions such as “first,” “second,” “first,” or “second” may describe various elements in any order and/or importance, and may refer to one element as another. It is only used to distinguish from components and does not limit the components. For example, a first user device and a second user device may represent different user devices regardless of order or importance. For example, a first component may be renamed a second component without departing from the scope of rights described in this document, and similarly, the second component may also be renamed to the first component.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case where it is "directly connected," but also the case where it is "electrically connected" with another element in between. . In addition, when a part is said to "include" a certain component, this does not mean excluding other components unless specifically stated to the contrary, but may further include other components, and one or more other features. It should be understood that it does not exclude in advance the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

1 is a block diagram showing the configuration of a general electric rice cooker according to an embodiment.

According to one embodiment, as shown in FIG. 1, a general electric rice cooker includes a key input unit 10 for setting various operation modes, a temperature detection unit 20 for detecting the internal temperature of the electric rice cooker, and a control signal. A heating unit 30 whose heat generation level is controlled accordingly, a display unit 40 for displaying the operating state of the electric rice cooker, and a user request signal input through the key input unit 10. and a microcomputer 50 that controls the operation of the display unit 40. At this time, the microcomputer 50 may have a built-in timer (not shown) for setting a time desired by the user. The electric rice cooker may not be limited to the components shown in FIG. 1. For example, the electric rice cooker may further include an outer pot and an inner pot.

According to one embodiment, the key input unit 10 is composed of a plurality of keys mounted on the outer periphery of the outer pot or lid of the electric rice cooker and operates various operation modes of the electric rice cooker, such as a cooking menu selection function, a cooking function, and a warming function. You can set it.

According to one embodiment, the microcomputer 50 (or processor) receives a signal output from the key input unit 10 and a temperature value within the electric rice cooker detected by the detection unit 20 according to the user's selection. The operations of the heating unit 30 and the display unit 40 can be controlled. The microcomputer 50 may be electrically and/or operationally connected to components (e.g., key input unit 10, temperature detection unit 20, heating unit 30, display unit 40), and may be connected to data. Communication can be performed, data can be processed and analyzed, and commands can be delivered to the components.

According to one embodiment, the temperature sensing unit 20 may include a sensor that detects temperature. The temperature sensing unit 20 may be located or attached to the lower part of the inner pot of the electric rice cooker. The temperature sensing unit 20 can detect the temperature or heat of the inner pot. For example, while the electric rice cooker is cooking, the temperature sensing unit 20 may sense the temperature or heat of the inner pot. The temperature sensing unit 20 may provide the sensed temperature or heat of the inner pot to the microcomputer 50.

According to one embodiment, the heating unit 30 may include a coil. The heating unit 30 may be located around the inner pot. While the electric rice cooker is cooking, heat generated by applying voltage to the coil may be transferred to the inner pot.

According to one embodiment, the display unit 40 may perform a function of displaying various visual indications, such as various operation modes, internal temperature, operating status, and time of the electric rice cooker.

Figure 2 is a diagram showing a circuit 200 inside an electric rice cooker according to an embodiment.

Referring to FIG. 2, the circuit 200 may include a sensor unit 20 and a resistor unit 201. The circuit 200 is not limited to the configuration shown in FIG. 2, and additional components may be added. For example, the circuit 200 may further include circuit units corresponding to a heating unit, a key input unit, and a display unit, and may be electrically connected thereto.

According to one embodiment, the circuit 200 may be connected to the microcomputer 50. The circuit 200 may be mounted inside an electric rice cooker and used to drive the operation of the electric rice cooker. For example, an electric rice cooker can detect the temperature (heat) of the inner pot through the sensor unit 20 using the circuit 200. Information about the temperature (heat) of the inner pot detected through the sensor unit 20 may be transmitted to the microcomputer 50 along the circuit 200. The microcomputer 50 can receive information about the temperature (heat) of the inner pot received from the sensor unit 20 and control the heat of the inner pot based on the received information. For example, based on the information about the temperature, the microcomputer 50 may control the heating unit 30 so that the temperature of the inner pot does not rise any further when the inner pot reaches a set temperature. For another example, based on the information about the temperature, if the inner pot does not reach the set temperature, the microcomputer 50 controls the heating unit 30 until the temperature of the inner pot reaches the set temperature. can do.

According to one embodiment, when the resistance value of the sensor unit 20 is the first resistance value, the voltage value of the first point 210 of the circuit 200 may be the first voltage value. For example, when the resistance value of the sensor unit 20 is 4.7 Kohm, the voltage value at the first point 210 of the circuit 200 may be 1.5 V. In this case, the circuit 200 may mean a normal state in which it can operate normally.

According to one embodiment, when the resistance value of the sensor unit 20 is the first resistance value (e.g., 4.7 Kohm) and the resistance unit 201 of the circuit 200 is misinserted or separated, the first resistance value of the circuit 200 The voltage value at point 1 210 may be 0.5V or less. For example, in the above case, the voltage value of the first point 210 may be 0.1V, 0.2V, 0.3V, 0.4V, or 0.5V. In this case, the circuit 200 may indicate a defective component that may operate abnormally.

Figure 3 is a circuit diagram 300 showing a defect inspection method according to an embodiment.

Referring to Figure 3, the circuit 300 may include a buzzer 301, a first toggle switch 302, a second toggle switch 303, a push button switch 304, and a meter (METER) 305. there is. Circuit 300 may not be limited to the configuration shown in FIG. 3 .

According to one embodiment, a portion of the first toggle switch 302 may be connected to the sensor unit 20. A portion of the second toggle switch 303 may be connected to the first point 210 of the circuit 200.

According to one embodiment, in order to check whether the circuit 200 is defective, the defect test may be performed while the circuit 200 is electrically connected to the circuit 300. For example, the sensor unit 20 and the first point 210 of the circuit 200 are located at a portion of the first toggle switch 302 and a portion of the second toggle switch 303 of the circuit 300, respectively. Can be electrically connected. When the circuit 200 and the circuit 300 are electrically connected as above, when the operation is electrically operated, that is, when the power of the circuit 300 is turned on, the first point 210 of the circuit 200 Voltage can be monitored in real time. The monitoring may mean measuring in real time, and may mean that the voltage value of the first point 210 can be measured in real time.

According to one embodiment, when the voltage value of the first point 210 is below the reference value, the buzzer 301 may output a sound. The reference value may be 0.5V. For example, when the voltage value of the first point 210 is detected as 0.1V, the buzzer 301 may output a sound. For another example, when the voltage value of the first point 210 is detected as 0.2V, the buzzer 301 may output a sound. For another example, when the voltage value of the first point 210 is detected as 0.3V, the buzzer 301 may output a sound. For another example, when the voltage value of the first point 210 is detected as 0.4V, the buzzer 301 may output a sound. For another example, when the voltage value of the first point 210 is detected as 0.5V, the buzzer 301 may output a sound.

Figure 4 is a flowchart showing a defect inspection method according to an embodiment.

Referring to FIG. 4 , the internal circuit 200 of the rice cooker can be inspected for defects using the defect inspection circuit 300 .

In operation 401, a component defect inspection of the internal circuit 200 of the electric rice cooker may be prepared. For example, this may mean seating the circuit 200 on the device of the inspection circuit 300, or may mean electrically connecting the circuit 200 and the inspection circuit 300. For example, the sensor unit 20 and the first point 210 of the circuit 200 are connected to a portion of the first toggle switch 302 and a portion of the second toggle switch 303 of the inspection circuit 300. Each can be electrically connected. In other words, when each part of the circuit 200 and the inspection circuit 300 is electrically connected to each other, it can be understood that preparations for inspection of defective components are completed.

In operation 402, with the circuit 200 and the test circuit 300 electrically connected and the test circuit 300 turned on, the voltage value at the first point 210 of the circuit 200 is the reference. You can determine whether it is less than the value. In the above state, when the resistance value of the sensor unit 20 of the circuit 200 is 4.7K ohm, the voltage value of the first point 210 must be measured as 1.5V in order for the circuit 200 to be determined as a normal component. You can. However, in order for the circuit 200 to be determined to be a defective component in the above state, the voltage value at the first point 210 may be measured to be less than 0.5V. The reference value may be 0.5V.

In operation 403, if the voltage value at the first point 210 of the circuit 200 is not less than 0.5V, the circuit 200 may be determined to be a normal circuit.

In operation 404, if the voltage value at the first point 210 of the circuit 200 is 0.5V or less, the circuit 200 may be determined to be a defective circuit, and the buzzer 301 of the inspection circuit 300 sounds. Can be printed. As a result, defective parts can be immediately recognized through the hearing of the part defect inspector.

According to one embodiment, defect inspection of the circuit 200 may also be performed through an external inspection. A second type of defect inspection device that inspects defects by enlarging the appearance includes a microscope unit that can magnify an image of the defect position of a circuit board (e.g., circuit 200) and an angle adjuster that can adjust the angle of the microscope unit. And, it may include a moving part that can move the microscope part.

According to one embodiment, the second type of defect inspection device may further include a seating portion capable of seating a product to be inspected (e.g., a circuit 200), with the circuit 200 placed on the seating portion. , the exterior of the circuit 200 can be inspected by forming a raster pattern through the microscope unit. In order to form the raster pattern, the exterior of the circuit 200 can be inspected by moving the microscope unit through the moving unit.

According to one embodiment, the second type of defect inspection device may further include a control unit, wherein the control unit determines whether a component is mounted, is twisted, stands up, shorts, has lead, etc., through an optical image acquired through a microscope unit. can be identified. For example, the control unit of the second type of defect inspection device may acquire an optical image of the first point 210 of the circuit 200 through the microscope unit, and determine whether the device is mounted based on the optical image. It is possible to determine whether a part is defective. The optical image may refer to an enlarged image of the circuit 200. Additionally, it is possible to obtain enlarged images taken at various angles of the circuit 200 through the angle adjuster. The control unit may determine whether a component of the circuit 200 is defective through captured images obtained at various angles.

According to one embodiment, the second type of defect inspection device may be combined with the configuration of the inspection circuit 300 described above to determine whether the circuit 200 is defective. For example, by taking an enlarged optical image of the first point 210 of the circuit 200 through a microscope section of the defect inspection device, the inspector can visually confirm the voltage value of the first point 210. By measuring in real time, if it falls below the specified value, a buzzer sounds so that the defect can be recognized audibly.

According to one embodiment, in order to check whether the circuit 200 is defective, optical images acquired through the microscope unit are collected and processed through an artificial intelligence model, thereby accurately determining whether the circuit 200 is defective. The artificial intelligence model refers to artificial intelligence, which refers to a computer program that implements human intelligence, such as learning, reasoning, and language understanding abilities, and machine learning (or machine learning, which seeks to realize functions such as human learning ability on a computer). ML)), and deep learning, which refers to a technology that allows computers to learn on their own in a way that mimics human complex neural networks, and learns through supervised learning, unsupervised learning, and reinforcement learning. It can be. The supervised learning refers to a method of learning by informing the computer of the correct answer to the input data, and the unsupervised learning refers to a learning method in which the computer discovers features and finds regularities in input data without the correct answer, and is one of machine learning. It can refer to a learning method by which a computer selects the optimal behavior for a given environment.

According to one embodiment, a captured image of the surface of the circuit 200 can be analyzed using the artificial intelligence model. For example, the control unit of the defect inspection device can determine whether the first point 210 of the circuit 200 is defective and the type of defect by inputting a captured image of the circuit 200 into the artificial intelligence model. . The artificial intelligence model may be trained to determine whether the first point 210 of the circuit 200 is defective and the type of defect based on the brightness, contrast, and roughness values of the surface of the circuit 210. The type of defect may mean whether the part is not inserted at the first point 210, is incorrectly inserted, is twisted, is upright, is short-circuited, or has a lead or not.

According to one embodiment, the control unit inputs a captured image of the first point 210 of the circuit 200 into the artificial intelligence model and determines the pattern of brightness, contrast, and roughness of the output first point 210. Based on this, it is possible to determine whether the first point 210 of the circuit 200 is defective and the type of defect.

According to one embodiment, in a system that can determine whether a component of an internal circuit of an electric rice cooker is defective, the internal circuit of the electric rice cooker may include a resistor unit, a microcomputer, and a sensor unit. The sensor unit, the resistor unit, and the microcomputer are sequentially electrically connected in that order, and a first point indicating an inspection point for checking whether the internal circuit is defective may be located between the microcomputer and the resistor unit. there is. The inspection device for determining whether a component of the internal circuit of the electric rice cooker is defective includes a buzzer, a first toggle switch, a second toggle switch, and electrically connected to the buzzer, the first toggle switch, and the second toggle switch. It may include a control unit. The first point and the sensor unit of the internal circuit are respectively connected to a portion of the first toggle switch and a portion of the second toggle switch of the inspection device, and when the inspection device is turned on, the control unit determines whether the voltage value of the first point is less than or equal to a specified value, and if the voltage value of the first point exceeds the specified value, determines that the internal circuit is normal, and determines that the voltage value of the first point is If the value is below the specified value, a sound can be output through the buzzer.

According to one embodiment, when the first point of the internal circuit and the sensor unit are respectively connected to a portion of the first toggle switch and a portion of the second toggle switch of the inspection device, the resistance value of the sensor portion is It may be 4.7K ohm.

According to one embodiment, the specified value may be 0.5V.

According to one embodiment, the inspection device may further include a microscope unit, an angle adjusting unit, a moving unit, and a seating unit, and the control unit may be electrically connected to the microscope unit, the angle adjusting unit, and the moving unit. there is. In a state in which the internal circuit is seated on the seating unit, the control unit uses the moving unit to draw a raster pattern of the external appearance of the internal circuit through the microscope unit and captures an image of the first point. Based on the captured image, it can be determined whether the internal circuit is defective.

According to one embodiment, the operation of taking an image of the first point includes the operation of taking an image while adjusting the angle through the angle adjuster, and the captured image is an enlarged image of the first point. It may refer to an optical image.

According to one embodiment, the operation of capturing the image may have a frame rate of 24fps, 25fps, 30fps, or 60fps.

According to one embodiment, the control unit detects a defect in the first point based on the pattern of brightness, contrast, and roughness of the first point output by inputting the captured image of the first point into an artificial intelligence model. The presence and type of defect can be determined.

Claims (7)

In a system that can determine whether a component in the internal circuit of an electric rice cooker is defective,
The internal circuit of the rice cooker is:
resistance unit;
microcomputer; and
Includes a sensor unit;
The sensor unit, the resistor unit, and the microcomputer are sequentially electrically connected in that order, and a first point indicating an inspection point for checking whether the internal circuit is defective is located between the microcomputer and the resistor unit,
An inspection device for determining whether a component of the internal circuit of the rice cooker is defective is:
buzzer;
first toggle switch;
a second toggle switch; and
A control unit electrically connected to the buzzer, the first toggle switch, and the second toggle switch,
The first point and the sensor unit of the internal circuit are respectively connected to a portion of the second toggle switch and a portion of the first toggle switch of the inspection device, and when the inspection device is turned on, the control unit determines whether the voltage value of the first point is 0.5V or less, and the resistance value of the sensor unit is 4.7K ohm,
When the voltage value at the first point exceeds the 0.5V, the internal circuit is determined to be normal,
If the voltage value at the first point is less than 0.5V, output a sound through the buzzer,
The inspection device may further include a microscope unit, an angle adjusting unit, a moving unit, and a seating unit, and the control unit may be electrically connected to the microscope unit, the angle adjusting unit, and the moving unit,
With the internal circuit seated on the seating portion, the control unit:
Using the moving part, the microscope part draws a raster pattern of the exterior of the internal circuit and takes an image of the first point,
A system for determining the presence or absence of lead at the first point of the internal circuit based on a pattern of brightness, contrast, and roughness of the first point included in a captured image of the first point.
delete delete delete In claim 1,
The operation of taking an image of the first point includes the operation of taking an image with the angle adjusted through the angle adjuster, and the captured image is an enlarged image of the first point, which means an optical image, system.
In claim 5,
The system wherein the operation of taking the image is at a frame rate of 24fps, 25fps, 30fps, or 60fps.
In claim 1,
The control unit:
Based on the pattern of brightness, contrast, and roughness of the first point output by inputting the captured image of the first point into an artificial intelligence model, determining whether the first point is defective and the type of defect, system.