Corrosion inspection for pipe
The magnetic field-based inspection device addresses the challenge of assessing pipe corrosion by using eddy currents to accurately evaluate pipe condition, improving sprinkler system reliability and fire suppression.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BOOMYOUNG CO LTD
- Filing Date
- 2024-11-21
- Publication Date
- 2026-05-15
AI Technical Summary
Existing methods for inspecting pipe corrosion in sprinkler systems, particularly in wet sprinklers, are inadequate as they fail to accurately assess the internal condition of pipes due to the invisibility of the inner surface, leading to potential blockages and reduced fire suppression effectiveness.
An inspection device utilizing a magnetic field to induce eddy currents in the pipe, which is then analyzed through a detection circuit and processor to determine the thickness of rust and internal state, allowing for non-destructive assessment of pipe condition.
Enables precise and efficient identification of pipe corrosion, ensuring the integrity and functionality of sprinkler systems, thereby enhancing fire suppression capabilities and reducing maintenance costs.
Smart Images
Figure KR2024018544_15052026_PF_FP_ABST
Abstract
Description
Pipe corrosion inspection
[0001] The following descriptions relate to an inspection device that uses a magnetic field for inspecting pipe corrosion.
[0002] Sprinklers may be installed within a building. A sprinkler may include heads and pipes. In the case of a wet sprinkler, water may be filled into the pipes, and in the event of a fire, the sprinkler heads may open. The water filled into the pipes may be sprayed through the open heads.
[0003] The foregoing content is not claimed as prior art of the present disclosure.
[0004] In the case of wet sprinklers, since water fills the pipes, rust can form due to corrosion on the inner surface of the pipes. Rust can obstruct the flow of water and weaken the rigidity of the pipes.
[0005] An inspection device for inspecting a pipe of a sprinkler is disclosed. The inspection device may include: a housing coupled to the pipe so as to at least partially wrap the outer surface of the pipe; a sensor disposed inside the housing, comprising a first coil that applies an induced magnetic field to the pipe based on the input of a first signal, and a second coil configured to acquire a second signal based on the induced magnetic field by interacting with the induced magnetic field; a detection circuit configured to acquire the second signal from the sensor and acquire measurement values of a plurality of parameters based on the second signal; a first motor configured to move the sensor forward and backward along the outer surface of the pipe; and a processor configured to control the first motor and acquire the measurement values of the plurality of parameters from the detection circuit. The processor may be configured to acquire the measured values of the plurality of parameters when the sensor is adjacent to a first position on the outer surface of the pipe, select a first parameter among the plurality of parameters, identify a first measured value of the first parameter, compare the first measured value of the first parameter with a threshold range predefined for the first parameter, and identify the internal state of the pipe for a second position on the inner surface of the pipe corresponding to the first position based on the result of the comparison between the first measured value of the first parameter and the threshold range predefined for the first parameter.
[0006] An inspection device according to one embodiment can inspect the internal condition of a pipe, thereby facilitating the maintenance and repair of the pipe. In addition, since the internal condition of the pipe can be precisely inspected through the inspection device, the fire suppression effect by the sprinkler can be enhanced in the event of a fire.
[0007] Figure 1 illustrates a sprinkler and a pipe.
[0008] Figure 2 illustrates a pipe.
[0009] FIG. 3 is a block diagram of an inspection device according to one embodiment.
[0010] FIGS. 4 and FIGS. 5 schematically illustrate a sensor of an inspection device according to one embodiment.
[0011] FIG. 6 illustrates a pipe combined with an inspection device according to one embodiment.
[0012] FIG. 7 is a flowchart illustrating the operation of an inspection device according to one embodiment identifying the internal state of a pipe.
[0013] FIG. 8 is a flowchart illustrating the operation of an inspection device according to one embodiment moving a sensor back and forth to identify the internal state of a pipe.
[0014] FIG. 9 illustrates a sensor adjacent to a first position.
[0015] FIG. 10 illustrates a sensor adjacent to a second position spaced apart from a first position.
[0016] FIG. 11 is a flowchart illustrating the operation of an inspection device according to one embodiment moving a sensor in the direction of curvature to identify the internal state of a pipe.
[0017] FIG. 12 illustrates a sensor adjacent to a first position.
[0018] FIG. 13 illustrates a sensor adjacent to a fifth position spaced apart from a first position.
[0019] FIG. 14 illustrates an image provided by an inspection device according to one embodiment.
[0020] Hereinafter, some embodiments of the present invention will be described in detail with reference to the exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings.
[0021] Figure 1 illustrates a sprinkler and a pipe. Figure 2 illustrates a pipe.
[0022] Referring to FIG. 1, a sprinkler (10) may be installed in a building. The sprinkler (10) may include a head (30) and a pipe (20). In the case of a wet sprinkler (10), water may be filled into the pipe (20), and in the event of a fire, the head (30) of the sprinkler (10) may be opened. The water filled into the pipe (20) may be sprayed through the opened head (30). In the case of a wet sprinkler (10), since water is filled into the pipe (20), water can be sprayed immediately in the event of a fire, thus providing high stability and reliability, and compared to a dry sprinkler, it may have a simple structure, so maintenance costs may be low.
[0023] Referring to FIG. 2, the pipe (20) can be formed from a conductive material. Since the metal material has high strength, it can provide rigidity to the structure compared to other materials. Since the metal material has high durability, it can have high resistance to physical damage such as wear. For example, the pipe (20) can be formed from iron. However, if the metal material reacts with the surrounding environment and corrodes chemically, the surface of the pipe (20) may be damaged and performance degradation, such as reduced strength and durability, may occur.
[0024] In the case of a sprinkler (10), since water is filled inside the pipe (20), the inner surface (22) of the pipe (20) that comes into contact with water can easily corrode. As the inner surface (22) of the pipe (20) that comes into contact with water corrodes, rust may form on the inner surface (22) of the pipe (20). Rust is iron oxide formed by the oxidation of iron. Rust can weaken the rigidity of the pipe (20) and reduce the hollow area of the pipe (20). If excessive rust is formed, the hollow of the pipe (20) becomes blocked by the rust, which can reduce the amount and pressure of water supplied to the head (30) along the pipe (20). A reduction in the amount and pressure of water can make it difficult to suppress a fire early.
[0025] Since the inner surface (22) of the pipe (20) is not visible after the pipe (20) is installed, it may be difficult to inspect the condition of the inner surface (22) of the pipe (20). For example, an inspection device may be used to inspect whether the condition of the inner surface (22) of the pipe (20) of the sprinkler (10) is normal or corroded. For example, the inspection device may use ultrasound or a vision sensor. In the case of an inspection device using ultrasound or a vision sensor, it is difficult to accurately inspect the internal condition of the pipe, and expensive parts are required.
[0026] An inspection device according to one embodiment (e.g., the inspection device (100) of FIG. 3) may be configured to identify the internal state of a pipe (20) by using a sensor (e.g., the sensor (110) of FIG. 3) configured to apply an induced magnetic field to a pipe (20) and acquire a signal based on the induced magnetic field. Hereinafter, an inspection device (100) according to one embodiment is described.
[0027] FIG. 3 is a block diagram of an inspection device according to one embodiment. FIG. 4 and FIG. 5 schematically illustrate a sensor of an inspection device according to one embodiment.
[0028] An inspection device (100) according to one embodiment may be configured to identify the thickness of rust formed on the inner surface (22) of a pipe (20) using a magnetic force current (MFC). The magnetic force current is a current formed by an induced magnetic field (e.g., eddy current), and within this specification, the magnetic force current may be referred to as a current caused by an induced magnetic field. An inspection device (100) according to one embodiment is a non-destructive inspection device capable of identifying the thickness of rust formed on the inner surface (22) of a pipe (20) using the magnetic force current (e.g., eddy current), and can identify the thickness of the rust through a simplified structure.
[0029] An inspection device (100) according to one embodiment may include a housing (150), a sensor (110), a detection circuit (120), a processor (140), a first motor (130), a second motor (160), and / or a memory (170).
[0030] According to one embodiment, the sensor (110) may be configured to apply an induced magnetic field to the pipe (20), acquire a signal based on the induced magnetic field (e.g., a second signal), and provide the acquired second signal to the detection circuit (120).
[0031] Referring to FIG. 4, the sensor (110) may include a first coil (110a) and a second coil (110b). As illustrated in FIG. 4, the first coil (110a) and the second coil (110b) may be wound on a single core (111).
[0032] Referring to FIG. 4, the sensor (110) may be positioned adjacent to the outer surface (21) of the pipe (20). For example, while the sensor (110) is positioned adjacent to the outer surface (21) of the pipe (20), a first signal may be applied to the first coil (110a). As the first signal is applied to the first coil (110a), a first magnetic field (M1) may be formed. For example, when a high-frequency alternating current flows along the coil, the first magnetic field (M1), which is an alternating magnetic field, may be formed. The first magnetic field may induce a current (E) (e.g., eddy current) in the pipe (20). For example, since the pipe (20) contains a conductive material (e.g., metal), an induced magnetic field may be generated on the outer surface (21) of the pipe (20), which is a conductor, and a current (E) may be generated by the induced magnetic field. A coating layer may be disposed on the outer surface (21) of the pipe (20). The coating layer may include a non-conductive material. For example, the coating layer may include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), and / or epoxy resin, but is not limited thereto.
[0033] According to one embodiment, since the coating layer is formed of a non-conductive material, a current (E) caused by an induced magnetic field can be formed on the outer surface (21) of the pipe (20). The current (E) formed on the outer surface (21) of the pipe (20) can cause a second magnetic field (M2). The second magnetic field (M2) can interact with a second coil (110b) adjacent to the outer surface (21) of the pipe (20). For example, the second coil (110b) may be positioned closer to the pipe (20) than the first coil (110a) to interact with the second magnetic field (M2). For example, if the first coil (110a) and the second coil (110b) are wound on a single core (111), the second coil (110b) may be positioned below the first coil (110a). However, it is not limited thereto.
[0034] As illustrated in FIG. 5, the sensor (110) may include a first core (111-1) with a first coil (110a) wound around it and a second core (111-2) with a second coil (110b) wound around it. The second core (111-2) may be located closer to the pipe (20) than the first core (111-1). Although not illustrated, the second core (111-2) may be located on the opposite side of the first core (111-1). For example, the first core (111-1) with the first coil (110a) wound around it may be located above the pipe (20), and the second core (111-2) with the second coil (110b) wound around it may be located below the pipe (20).
[0035] According to one embodiment, the second coil (110b) may be configured to obtain a second signal by a second magnetic field (M2) formed by a current (E) formed on the outer surface (21) of the pipe (20). For example, the second coil (110b) may be configured to generate a second signal by interacting with the second magnetic field (M2). The second signal generated through the second coil (110b) may include a signal regarding a current and / or voltage applied to the second coil (110b) by the second magnetic field (M2). For example, the second magnetic field (M2) formed by the current (E) may induce a current flowing along the second coil (110b). The second coil (110b) may be configured to generate a signal in the form of a sine wave regarding the current.
[0036] Referring again to FIG. 3, according to one embodiment, the detection circuit (120) may be configured to acquire a second signal through the sensor (110). The detection circuit (120) may be configured to acquire a plurality of parameters based on the second signal. For example, the detection circuit (120) may include a lock-in amplifier configured to detect a signal that reflects the characteristics of the current (E) caused in the pipe (20). For example, the detection circuit (120) may be configured to detect the amplitude and phase of an input signal associated with a periodic reference signal using a low-pass filter (LPF).
[0037] According to one embodiment, the detection circuit (120) may be configured to identify the characteristics of a second signal resulting from a change in impedance in the second coil (110b). The detection circuit (120) may utilize a process of finding solutions for each boundary condition in Maxwell's equations to analyze the second signal based on the current (E) formed on the outer surface (21) of the pipe (20), and may particularly utilize signal analysis using the finite element method by considering the geometric shape and material properties of the pipe (20) to be analyzed. For example, as a signal analysis used to analyze the electromagnetic field and for current modeling, an analytical method and a numerical method may be used, and the finite difference method (FDM), finite element method (FEM), boundary element method (BEM), volume integral method (VIM), etc. may be used.
[0038] According to one embodiment, the measurement values of a plurality of parameters obtained through the detection circuit (120) may be provided to the processor (140). The detection circuit (120) may be configured to obtain a second signal from the second sensor (110) and to provide the measurement values of a plurality of parameters obtained based on the second signal to the processor (140).
[0039] According to one embodiment, a plurality of parameters may include a first parameter and a second parameter. For example, the first parameter may be a primary sensing parameter obtained through a detection circuit (120) and may include the difference in voltage between a first signal and a second signal, and the difference in phase between a first signal and a second signal. For example, the second parameter may include the resistance of a second coil (110b) and the impedance of a second coil (110b) calculated based on the first parameter. However, it is not limited thereto. For example, the difference in voltage may be represented as an amplitude due to a potential difference.
[0040] According to one embodiment, the processor (140) can obtain measurement values of a plurality of parameters obtained from the detection circuit (120). The processor (140) can represent the measurement values for each of the plurality of parameters as a two-dimensional or three-dimensional graph.
[0041] According to one embodiment, the processor (140) may be configured to obtain information indicating the internal state of the pipe (20) based on at least one of a plurality of parameters. The processor (140) may be configured to identify the internal state of the pipe (20) based on at least one of a plurality of parameters received from the detection circuit (120). In this case, the internal state of the pipe (20) may be identified for a position on the inner surface (22) of the pipe (20) according to the position of the sensor (110). For example, when the sensor (110) is adjacent to a first position on the outer surface (21) of the pipe (20), the sensor (110) may obtain a second signal for a second position on the inner surface (22) of the pipe (20) corresponding to the first position. The detection circuit (120) may be configured to obtain measurement values of a plurality of parameters based on the second signal for the second position and to provide the measurement values to the processor (140). The processor (140) may be configured to select at least one parameter (e.g., a first parameter) among a plurality of parameters received from the detection circuit (120) and to identify the internal state (e.g., normal state or corrosive state) of the pipe (20) for a second location based on a first measurement value of the first parameter. For example, when the sensor (110) is adjacent to a third location on the outer surface (21) of the pipe (20), the sensor (110) may acquire a second signal for a fourth location on the inner surface (22) of the pipe (20) corresponding to the third location. The detection circuit (120) may be configured to acquire measurement values of a plurality of parameters based on the second signal for the fourth location and to provide the measurement values to the processor (140).The processor (140) may be configured to select at least one parameter (e.g., a second parameter) among a plurality of parameters received from the detection circuit (120), and to identify the internal state (e.g., normal state or corrosive state) of the pipe (20) at a fourth location based on a second measurement value of the second parameter. The process of the processor (140) identifying the internal state of the pipe (20) based on the measurement value will be described later.
[0042] According to one embodiment, the memory (170) may store information regarding a threshold range for each of the measurement values of a plurality of parameters. The threshold range may be referenced as a range for each of the measurement values of a plurality of parameters indicating that the internal state of the pipe (20) is in a normal state. For example, the memory (170) may store a threshold range based on a measurement value for the voltage difference between a first signal and a second signal obtained when the internal state of the pipe (20) is in a normal state. For example, the memory (170) may store a threshold range based on a measurement value for the difference between the phase of the first signal and the phase of the second signal obtained when the internal state of the pipe (20) is in a normal state. For example, the memory (170) may store a threshold range based on a measurement value for the resistance of the second coil (110b) obtained when the internal state of the pipe (20) is in a normal state. For example, the memory (170) may store a threshold range based on a measurement of the impedance of the second coil (110b) obtained when the internal state of the pipe (20) is in a normal state. Each of the threshold ranges may be predefined based on a result previously measured for the pipe (20) in a normal state. The memory (170) may store information about the threshold ranges, and the processor (140) may be configured to identify the internal state of the pipe (20) using the information about the threshold ranges stored in the memory (170). For example, the processor (140) may be configured to obtain a value A corresponding to the impedance of the second coil (110b) for a second position, and to identify the internal state of the pipe (20) based on whether the value A is included within the threshold range for impedance stored in the memory (170). According to one embodiment, the memory (170) may store information related to the pipe (20).For example, the memory (170) can store size information of the pipe (20), material information of the pipe (20), material information of the coating layer, manufacturer information of the pipe (20), specification information of the pipe (20), etc.
[0043] When an induced magnetic field is applied to the pipe (20), the induced magnetic field may interact with the rust formed on the inner surface (22) of the pipe (20). For example, the rust formed on the inner surface (22) of the pipe (20) may affect the induced magnetic field formed by the first coil. Since the second signal based on the induced magnetic field is affected by the rust, when the amount of rust is at an appropriate level, the measured values of the plurality of parameters may be identified within a threshold range corresponding to each of the measured values. When the amount of rust exceeds an appropriate level, the measured values of the plurality of parameters may not be included within the threshold range corresponding to each of the measured values and may go outside the threshold range. The processor (140) [determines] that [goes] outside the threshold range
[0044] According to one embodiment, a housing (150) may be coupled to a pipe (20) so as to at least partially wrap the outer surface (21) of the pipe (20). The housing (150) may define the exterior of the inspection device (100). The housing (150) may accommodate components of the inspection device (100). Components of the inspection device (100) may be placed within the housing (150). For example, a sensor (110), a detection circuit (120), a first motor (130), a second motor (160), a memory (170), and a processor (140) may be placed within the housing (150).
[0045] According to one embodiment, the first motor (130) may be configured to transport the sensor (110) forward and backward along the outer surface (21) of the pipe (20). According to one embodiment, the second motor (160) may be configured to rotate the second housing part (152) relative to the first housing part (151). According to one embodiment, the housing (150) may include the first housing part (151) and the second housing part (152). The first housing part (151) may be exposed to the outside as a part defining the exterior of the inspection device (100). The second housing part (152) may be rotatably coupled to the first housing part (151) inside the first housing part (151).
[0046] FIG. 6 illustrates a pipe combined with an inspection device according to one embodiment.
[0047] Referring to FIG. 6, the housing (150) may be attached to the outer surface (21) of the pipe (20) so as to at least partially surround the outer surface (21) of the pipe (20). For example, the pipe (20) may have a hollow cylindrical shape, and the housing (150) may have a cylindrical shape corresponding to the cylindrical shape of the pipe (20). The pipe (20) may be inserted into the hollow of the housing (150). The aforementioned sensor (110), first motor (130), and second motor (160) may be disposed within the housing (150).
[0048] FIG. 7 is a flowchart illustrating the operation of an inspection device according to one embodiment identifying the internal state of a pipe.
[0049] The operations illustrated in FIG. 7 may be operations performed by the inspection device (100) when instructions stored in memory (170) are executed by the processor (140) of the inspection device (100).
[0050] Referring to FIG. 7, in operation 701, the processor (140) may be configured to acquire measurement values of a plurality of parameters when the sensor (110) is adjacent to a first position on the outer surface (21) of the pipe (20), and to select a first parameter among the plurality of parameters.
[0051] According to one embodiment, the processor (140) may be configured to identify the location of the sensor (110) relative to the pipe (20). For example, the inspection device (100) may include a magnet placed at the sensor (110) and a Hall sensor placed in the housing (150). Since the distance between the magnet and the Hall sensor changes depending on the location of the sensor (110), the Hall sensor may be used to detect the location of the sensor (110) based on the amount of change in the magnetic field generated from the magnet depending on the location of the sensor (110). The Hall sensor transmits data indicating the strength of the magnetic field generated from the magnet to the processor (140), and the processor (140) may be configured to identify the location of the sensor (110) based on the data received from the Hall sensor. In the description above, it was explained that a magnet is placed in the sensor (110) and a Hall sensor is placed in the housing (150); however, conversely, a Hall sensor may be placed in the sensor (110) and a magnet may be placed in the housing (150). Through the above operation, the processor (140) can identify the location of the sensor (110).
[0052] According to one embodiment, the processor (140) may be configured to acquire measurement values of a plurality of parameters when the sensor (110) is adjacent to a first position on the outer surface (21) of the pipe (20). For example, the first coil of the sensor (110) may apply an induced magnetic field to the pipe (20) when the sensor (110) is adjacent to a first position on the outer surface (21) of the pipe (20), and the second coil may acquire a second signal based on the induced magnetic field. The detection circuit (120) may transmit measurement values of a plurality of parameters based on the second signal to the processor (140) when the sensor (110) is adjacent to a first position on the outer surface (21) of the pipe (20). The processor (140) may acquire measurement values of a plurality of parameters from the detection circuit (120) when the sensor (110) is adjacent to a first position on the outer surface (21) of the pipe (20).
[0053] According to one embodiment, the processor (140) may select one of a plurality of parameters (e.g., a first parameter). For example, the processor (140) may select one parameter that best represents the internal state of a second position on the inner surface (22) of the pipe (20) corresponding to a first position on the outer surface (21) of the pipe (20) within the frequency of the first signal and / or the second signal. For example, among the plurality of parameters obtained through the detection circuit (120), if the voltage difference between the first signal and the second signal is clear, the processor (140) may be configured to select the voltage difference. For example, one parameter selected according to frequency may be specified. According to one embodiment, the processor (140) may be configured to select one of a plurality of parameters based on the frequency band of the first signal applied to the first coil (110a). For example, if the frequency band of the first signal is within the range of about 400 kHz to about 500 kHz, the processor (140) may be configured to select the phase difference between the first signal and the second signal among a plurality of parameters. If the frequency of the first signal is too low, it may be difficult to identify the second distance. According to one embodiment, the frequency of the first signal may be about 400 kHz to about 500 kHz. The processor (140) may be configured to select the phase difference between the first signal and the second signal in response to identifying the first signal on the frequency band.
[0054] In operation 703, the processor (140) may be configured to identify a first measurement value of a first parameter.
[0055] According to one embodiment, the processor (140) may be configured to identify a first measurement value corresponding to a measurement value of a selected first parameter. For example, if the selected first parameter is a phase difference between a first signal and a second signal, the processor (140) may identify a measurement value for the phase difference between the first signal and the second signal when the sensor (110) is adjacent to a first position on the outer surface (21) of the pipe (20).
[0056] In operation 705, the processor (140) may be configured to compare a first measurement value of the first parameter with a predefined threshold range for the second parameter.
[0057] According to one embodiment, the processor (140) can compare a first measurement value with a predefined threshold range for a first parameter. The predefined threshold range for the first parameter may be referenced as a range of measurement values of the first parameter that can be obtained from a pipe (20) in a normal state. For example, a normal state may be referenced as a state in which the rust formed on the inner surface (22) of the pipe (20) is at an appropriate level.
[0058] In operation 707, the processor (140) may be configured to identify the internal state of the pipe (20) for a second position of the inner surface (22) of the pipe (20) corresponding to a first position, based on the result of comparing the first measurement value of the first parameter with the threshold range.
[0059] A second position on the inner surface (22) of the pipe (20) may correspond to a first position on the outer surface (21) of the pipe (20). For example, the first position and the second position may be aligned with each other. For example, the first position and the second position may face each other. According to one embodiment, the processor (140) may be configured to identify the normal state of the pipe (20) for the second position based on identifying a first measurement value of the first parameter that is included within a predefined threshold range for the first parameter. For example, when the rust is at an appropriate level, that is, when the internal state of the pipe (20) is normal, the first measurement value may be included within the threshold range. The processor (140) may identify the internal state of the pipe (20) as normal when it identifies that the first measurement value is included within the threshold range.
[0060] According to one embodiment, the processor (140) may be configured to identify the corrosion state of the pipe (20) at a second location based on identifying a first measurement value of the first parameter that falls outside a predefined threshold range for the first parameter. For example, if the rust exceeds an appropriate level, i.e., if the internal state of the pipe (20) is a corrosive state, the first measurement value may not be included within the threshold range and may fall outside the threshold range. The processor (140) may identify the internal state of the pipe (20) as a corrosive state when it identifies that the first measurement value is not included within the threshold range and falls outside the threshold range.
[0061] In operation 709, the processor (140) may be configured to transmit location information for the second location and the internal state for the second location to an external electronic device based on identifying the internal state of the pipe (20) for the second location.
[0062] According to one embodiment, the processor (140) may transmit location information for the second location and information indicating the internal state of the second location to an external electronic device in order to indicate the internal state of the pipe (20) for the second location. Here, the external electronic device may be referred to as a manager device. For example, a manager device carried by a worker inspecting the corrosion of the pipe (20) may provide detailed information regarding the normal state and the corrosion state of the pipe (20) in order to provide information regarding the internal state of the pipe (20). The inspection device (100) may provide information indicating the current state of the second location by providing location information for the second location and information indicating the internal state of the second location to the manager device. The location information for the second location may be provided as coordinates, the relative position of the second location to the entire pipe (20), etc. Based on the location information for the second location and the information indicating the internal state of the second location transmitted to the external electronic device (manager device), the manager may recognize whether the state of the second location is normal or corroded.
[0063] An inspection device (100) according to one embodiment can provide the internal condition of a pipe (20) in a non-destructive manner. Based on the information provided by the inspection device (100), the operator can determine whether the water supply is smooth due to rust. Through the information provided by the inspection device (100), it can be determined where in the pipe (20) a large amount of rust has formed and whether replacement, repair, or maintenance is required, so the internal condition of the pipe (20) that is not visible from the outside can be inspected. Since the internal condition of the pipe (20) can be easily and accurately detected before a fire occurs, safety accidents can be prevented in advance, and maintenance of the pipe (20) of the sprinkler (10) can be easy.
[0064] FIG. 8 is a flowchart illustrating the operation of an inspection device according to one embodiment moving a sensor back and forth to identify the internal state of a pipe. FIG. 9 illustrates a sensor adjacent to a first position. FIG. 10 illustrates a sensor adjacent to a second position spaced apart from the first position.
[0065] The operations illustrated in FIG. 8 may be operations performed by the inspection device (100) when instructions stored in memory (170) are executed by the processor (140) of the inspection device (100).
[0066] Referring to FIG. 8, in operation 801, the processor (140) may be configured to control the first motor (130) so that the sensor (110) is adjacent to a third position on the outer surface (21) of the pipe (20) that is spaced forward or backward from the first position, based on identifying the internal state of the pipe (20) for a second position.
[0067] According to one embodiment, when the internal state of a second position corresponding to a first position is identified using the sensor (110), the processor (140) may move the sensor (110) to identify the internal state of a position on the inner surface (22) of a pipe (20) different from the second position.
[0068] According to one embodiment, the first motor (130) may be configured to move the sensor (110) forward and backward. Referring to FIG. 9, the first motor (130) and the sensor (110) may be placed within a housing (150). For example, the first motor (130) may be adjacent to a side wall of the housing (150). The sensor (110) may be connected to the shaft (910) of the first motor (130). The first motor (130) may move the sensor (110) forward and backward by moving the shaft (910) forward and backward. The first motor (130) may be referred to as a linear motor.
[0069] According to one embodiment, the processor (140) may be configured to control the first motor (130) so that the sensor (110) is adjacent to a third position on the outer surface (21) of the pipe (20) that is spaced forward or backward from the first position, based on identifying the internal state of the second position. The first motor (130) can be controlled by the processor (140) to move the sensor (110) from a position adjacent to the first position to a position adjacent to the third position. Referring to FIG. 10, the sensor (110) can be adjacent to the third position on the outer surface (21) of the pipe (20) by the first motor (130).
[0070] In operation 803, the processor (140) may be configured to acquire measurement values of a plurality of parameters when the sensor (110) is adjacent to a third position on the outer surface (21) of the pipe (20), and to select a second parameter among the plurality of parameters.
[0071] According to one embodiment, the processor (140) can identify that the sensor (110) is adjacent to a third position on the outer surface (21) of the pipe (20). As described above, the processor (140) can identify the position of the sensor (110) using a magnet and a Hall sensor. The processor (140) may be configured to acquire measurement values of a plurality of parameters when the sensor (110) is adjacent to a third position on the outer surface (21) of the pipe (20). For example, the first coil of the sensor (110) may apply an induced magnetic field to the pipe (20) when adjacent to a third position on the outer surface (21) of the pipe (20), and the second coil may acquire a second signal based on the induced magnetic field. The detection circuit (120) can transmit measurement values of a plurality of parameters based on the second signal to the processor (140) when the sensor (110) is adjacent to a third position on the outer surface (21) of the pipe (20). The processor (140) can obtain measurement values of a plurality of parameters from the detection circuit (120) when the sensor (110) is adjacent to a third position on the pipe (20).
[0072] According to one embodiment, the processor (140) may select a second parameter among a plurality of parameters. The second parameter may be the same as the first parameter. For example, if the first parameter is the voltage difference between the first signal and the second signal when the sensor (110) is adjacent to the first position, the processor (140) may select the second parameter as the voltage difference between the first signal and the second signal when the sensor (110) is adjacent to the second position. If the second parameter is different from the first parameter, it may be difficult to compare the internal state for the second position with the internal state for the fourth position described later. By selecting the same parameter, the processor (140) can accurately provide comparison and judgment regarding the internal state of the pipe (20). However, the embodiments of the present disclosure are not limited thereto. The second parameter may be different from the first parameter. For example, the processor (140) can select one parameter that best represents the internal state of a fourth position of the inner surface (22) of the pipe (20), corresponding to a third position of the outer surface (21) of the pipe (20).
[0073] In operation 805, the processor (140) may be configured to identify a second measurement value of the second parameter.
[0074] According to one embodiment, the processor (140) may be configured to identify a second measurement value corresponding to a measurement value of a selected second parameter. For example, if the selected second parameter is a phase difference between a first signal and a second signal, the processor (140) may identify a measurement value for the phase difference between the first signal and the second signal when the sensor (110) is adjacent to a third position on the outer surface (21) of the pipe (20).
[0075] In operation 807, the processor (140) may be configured to compare a second measurement value of the second parameter with a predefined threshold range for the second parameter.
[0076] According to one embodiment, the processor (140) can compare a second measurement value with a predefined threshold range for a second parameter. The predefined threshold range for the second parameter may be referenced as a range of measurement values of the second parameter that can be obtained from a pipe (20) in a normal state. For example, a normal state may be referenced as a state in which the rust formed on the inner surface (22) of the pipe (20) is at an appropriate level.
[0077] In operation 809, the processor (140) may be configured to identify the internal state of the pipe (20) for a fourth position of the inner surface (22) of the pipe (20) corresponding to a third position, based on the result of comparing the second measurement value of the second parameter with the threshold range.
[0078] A fourth position on the inner surface (22) of the pipe (20) may correspond to a third position on the outer surface (21) of the pipe (20). For example, the third position and the fourth position may be aligned with each other. For example, the third position and the fourth position may face each other. According to one embodiment, the processor (140) may be configured to identify the normal state of the pipe (20) for the fourth position based on identifying a second measurement value of the second parameter that is included within a predefined threshold range for the second parameter. For example, when the rust is at an appropriate level, that is, when the internal state of the pipe (20) is normal, the second measurement value may be included within the threshold range. The processor (140) may identify the internal state of the pipe (20) as normal when it identifies that the second measurement value is included within the threshold range.
[0079] According to one embodiment, the processor (140) may be configured to identify the corrosion state of the pipe (20) at a fourth location based on identifying a second measurement value of the second parameter that falls outside a predefined threshold range for the second parameter. For example, if the rust exceeds an appropriate level, i.e., if the internal state of the pipe (20) is a corrosive state, the second measurement value may not be included within the threshold range and may fall outside the threshold range. The processor (140) may identify the internal state of the pipe (20) as a corrosive state when it identifies that the second measurement value is not included within the threshold range and falls outside the threshold range.
[0080] In operation 811, the processor (140) may be configured to transmit location information for the fourth location and the internal state for the fourth location to an external electronic device based on identifying the internal state of the pipe (20) for the fourth location.
[0081] According to one embodiment, the processor (140) may transmit location information for the fourth location and information indicating the internal state of the fourth location to an external electronic device in order to indicate the internal state of the pipe (20) for the fourth location. Here, the external electronic device may be referred to as a manager device. For example, a manager device carried by a worker inspecting the corrosion of the pipe (20) may provide detailed information regarding the normal state and the corrosion state of the pipe (20) in order to provide information regarding the internal state of the pipe (20). The inspection device (100) may provide information indicating the current state of the fourth location by providing location information for the fourth location and information indicating the internal state of the fourth location to the manager device. The location information for the fourth location may be provided as coordinates, the relative position of the fourth location to the entire pipe (20), etc. Based on the location information for the fourth location and the information indicating the internal state of the fourth location transmitted to the external electronic device (manager device), the manager may recognize whether the state of the fourth location is normal or corroded.
[0082] An inspection device (100) according to one embodiment can provide information indicating the internal state of a pipe (20) while adjusting the position of a sensor (110). Through this, the overall state of the pipe (20) can be identified. If the position of the sensor (110) cannot be adjusted, the internal state of the pipe (20) can only be inspected within a limited area, so precise inspection may be difficult. An inspection device (100) according to one embodiment can move the sensor (110) from the first position to the third position and identify the internal state of the fourth position corresponding to the third position after the identification of the internal state of the second position corresponding to the first position is completed. As the above process is performed repeatedly, the internal state of the pipe (20) over a wide area can be identified.
[0083] FIG. 11 is a flowchart illustrating the operation of an inspection device according to one embodiment moving a sensor in the direction of curvature to identify the internal state of a pipe. FIG. 12 illustrates a sensor adjacent to a first position. FIG. 13 illustrates a sensor adjacent to a fifth position spaced apart from the first position.
[0084] The operations illustrated in FIG. 11 may be operations performed by the inspection device (100) when instructions stored in memory (170) are executed by the processor (140) of the inspection device (100).
[0085] Referring to FIG. 11, in operation 1101, the processor (140) may be configured to control the first motor (130) so that the sensor (110) is adjacent to the first position based on identifying both the internal state of the pipe (20) for the second position and the internal state of the pipe (20) for the fourth position.
[0086] The position of the sensor (110) adjacent to the first position may be the default position of the sensor (110) as a basic position. As described above, since the motor moves the sensor (110) forward and backward, it may be difficult to identify the internal state of the pipe (20) for a position circumferentially spaced from the second position and / or the fourth position. According to one embodiment, the processor (140) may move the sensor (110) back to the basic position, which is the first position, after identifying the internal state for both the second position and the fourth position by controlling the first motor (130).
[0087] In operation 1103, the processor (140) may be configured to control the second motor (160) so that the second housing part (152) rotates relative to the first housing part (151) based on identifying the sensor (110) adjacent to the first position.
[0088] Referring to FIG. 12, the housing (150) may include a first housing part (151) and a second housing part (152). The second housing part (152) may be rotatably coupled to the first housing part (151). A second motor (160) may be configured to rotate the second housing part (152) relative to the first housing part (151). For example, the second housing part (152) may be coupled to a rotor, and the first housing part (151) may be coupled to a stator. The second motor (160) may move the position of the sensor (110) by causing the second housing part (152) to rotate relative to the first housing part (151).
[0089] In operation 1105, the processor (140) may be configured to acquire measurement values of a plurality of parameters when the sensor (110) is adjacent to a fifth position spaced from a first position in the circumferential direction of the outer surface (21) of the pipe (20) according to the rotation of the second housing part (152), and to select a third parameter among the plurality of parameters.
[0090] According to one embodiment, the processor (140) can move the sensor (110) by controlling the second motor (160). For example, referring to FIG. 13, as the second housing part (152) is rotated by the second motor (160), the sensor (110) can be adjacent to a fifth position spaced from the first position in the circumferential direction of the outer surface (21) of the pipe (20).
[0091] According to one embodiment, the processor (140) can identify that the sensor (110) is adjacent to a fifth position on the outer surface (21) of the pipe (20). As described above, the processor (140) can identify the position of the sensor (110) using a magnet and a Hall sensor. The processor (140) may be configured to acquire measurement values of a plurality of parameters when the sensor (110) is adjacent to a fifth position on the outer surface (21) of the pipe (20). For example, the first coil of the sensor (110) may apply an induced magnetic field to the pipe (20) when it is adjacent to a fifth position on the outer surface (21) of the pipe (20), and the second coil may acquire a second signal based on the induced magnetic field. The detection circuit (120) can transmit measurement values of a plurality of parameters based on the second signal to the processor (140) when the sensor (110) is adjacent to a fifth position on the outer surface (21) of the pipe (20). The processor (140) can obtain measurement values of a plurality of parameters from the detection circuit (120) when the sensor (110) is adjacent to a fifth position on the pipe (20).
[0092] According to one embodiment, the processor (140) may select a third parameter among a plurality of parameters. The third parameter may be independent of the first parameter and the second parameter. For example, since the fifth position is spaced apart from the first position and the second position in the circumferential direction of the outer surface (21) of the pipe (20), the rust formed at the sixth position on the inner surface (22) of the pipe (20) corresponding to the fifth position may have a different aspect from the rust formed at the second position and / or the fourth position. The processor (140) may select one parameter that best represents the internal state of the sixth position on the inner surface (22) of the pipe (20) corresponding to the fifth position on the outer surface (21) of the pipe (20).
[0093] In operation 1107, the processor (140) may be configured to identify a third measurement value of a third parameter.
[0094] According to one embodiment, the processor (140) may be configured to identify a third measurement value corresponding to a measurement value of a selected third parameter. For example, if the selected second parameter is a phase difference between a first signal and a second signal, the processor (140) may identify a measurement value for the phase difference between the first signal and the second signal when the sensor (110) is adjacent to a fifth position on the outer surface (21) of the pipe (20).
[0095] In operation 1109, the processor (140) may be configured to compare a third measurement value of a third parameter with a predefined threshold range for the third parameter.
[0096] According to one embodiment, the processor (140) can compare a third measurement value with a predefined threshold range for a third parameter. The predefined threshold range for a third parameter may be referenced as a range of measurement values of the third parameter that can be obtained from a normal state pipe (20). For example, a normal state may be referenced as a state in which the rust formed on the inner surface (22) of the pipe (20) is at an appropriate level.
[0097] In operation 1111, the processor (140) may be configured to identify the internal state of the pipe (20) for a sixth position of the inner surface (22) of the pipe (20) corresponding to a fifth position, based on the result of comparing a third measurement value of the third parameter with a predefined threshold range for the third parameter.
[0098] A sixth position on the inner surface (22) of the pipe (20) may correspond to a fifth position on the outer surface (21) of the pipe (20). For example, the fifth position and the sixth position may be aligned with each other. For example, the fifth position and the sixth position may face each other. According to one embodiment, the processor (140) may be configured to identify the normal state of the pipe (20) for the sixth position based on identifying a third measurement value of the third parameter that is included within a predefined threshold range for the third parameter. For example, when the rust is at an appropriate level, that is, when the internal state of the pipe (20) is normal, the third measurement value may be included within the threshold range. The processor (140) may identify the internal state of the pipe (20) as normal when it identifies that the third measurement value is included within the threshold range.
[0099] According to one embodiment, the processor (140) may be configured to identify the corrosion state of the pipe (20) at a sixth location based on identifying a third measurement value of the third parameter that falls outside a predefined threshold range for the third parameter. For example, if the rust exceeds an appropriate level, i.e., if the internal state of the pipe (20) is a corrosive state, the third measurement value may not be included within the threshold range and may fall outside the threshold range. The processor (140) may identify the internal state of the pipe (20) as a corrosive state when it identifies that the third measurement value is not included within the threshold range and falls outside the threshold range.
[0100] In operation 1113, the processor (140) may be configured to transmit location information for the sixth position and the internal state for the sixth position to an external electronic device based on identifying the internal state of the pipe (20) for the sixth position.
[0101] According to one embodiment, the processor (140) may transmit location information for the sixth location and information indicating the internal state of the sixth location to an external electronic device in order to indicate the internal state of the pipe (20) for the sixth location. Here, the external electronic device may be referred to as a manager device. For example, a manager device carried by a worker inspecting the corrosion of the pipe (20) may provide detailed information regarding the normal state and the corrosion state of the pipe (20) in order to provide information regarding the internal state of the pipe (20). The inspection device (100) may provide information indicating the current state of the sixth location by providing location information for the sixth location and information indicating the internal state of the sixth location to the manager device. The location information for the sixth location may be provided as coordinates, the relative position of the sixth location to the entire pipe (20), etc. Based on the location information for the sixth location and the information indicating the internal state of the sixth location transmitted to the external electronic device (manager device), the manager may recognize whether the state of the sixth location is normal or corroded.
[0102] An inspection device (100) according to one embodiment can provide information indicating the internal state of a pipe (20) while adjusting the position of the sensor (110) in the forward, rear, and circumferential directions. Through this, the overall state of the pipe (20) can be identified. If the position of the sensor (110) cannot be adjusted, the internal state of the pipe (20) can only be inspected within a limited area, so precise inspection may be difficult. An inspection device (100) according to one embodiment can move the sensor (110) to the first position after the identification of the internal state of the second and fourth positions arranged on a straight line is completed, and then move the sensor (110) from the first position to the fifth position. Since the sensor (110) cannot be adjacent to the fifth position by the first motor (130), the processor (140) can make the sensor (110) adjacent to the fifth position by rotating the second housing part (152) using the second motor (160). At this time, after the sensor (110) is restored to the first position, which is the basic position, the second motor (160) is controlled, so after identifying the internal state for the sixth position, the first motor (130) is controlled to move the sensor (110) forward and / or backward again to identify the internal state. If the second motor (160) is operated and the second housing part (152) is rotated while the position of the sensor (110) is not restored, an area that is omitted may occur in the internal state identified after rotation. Since the inspection device (100) controls the first motor after rotation to move the sensor (110) forward and backward, if the second motor (160) is controlled while the sensor is not moved to the basic position, an area that is not inspected and is omitted may occur.The inspection device (100) controls the first motor (130) before controlling the second motor (160) to move the sensor (110) to a basic position (e.g., a position adjacent to the first position) and then controls the second motor (160), so that the area to be inspected after the rotation of the second housing part (152) is not omitted.
[0103] FIG. 14 illustrates an image provided by an inspection device according to one embodiment.
[0104] Referring to FIG. 14, the inspection device (100) can inspect the internal state of the entire area of the inner surface (22) of the pipe (20) by controlling the first motor (130) and the second motor (160). The processor (140) can generate an image (1400) representing the internal state identified according to the position of the sensor (110). For example, the internal state can be estimated based on the measurement value according to the position information of the sensor (110), and the estimated internal state can be graphically represented and provided as an image (1400). The inspection device (100) can transmit the image (1400) to an external electronic device. An operator can intuitively recognize the internal state of the pipe (20) through the image (1400) received by the external electronic device (e.g., a manager device).
[0105] An inspection device for inspecting a pipe of a sprinkler is disclosed. The inspection device may include: a housing coupled to the pipe so as to at least partially wrap the outer surface of the pipe; a sensor disposed inside the housing, comprising a first coil that applies an induced magnetic field to the pipe based on the input of a first signal, and a second coil configured to acquire a second signal based on the induced magnetic field by interacting with the induced magnetic field; a detection circuit configured to acquire the second signal from the sensor and acquire measurement values of a plurality of parameters based on the second signal; a first motor configured to move the sensor forward and backward along the outer surface of the pipe; and a processor configured to control the first motor and acquire the measurement values of the plurality of parameters from the detection circuit. The processor may be configured to acquire the measured values of the plurality of parameters when the sensor is adjacent to a first position on the outer surface of the pipe, select a first parameter among the plurality of parameters, identify a first measured value of the first parameter, compare the first measured value of the first parameter with a threshold range predefined for the first parameter, and identify the internal state of the pipe for a second position on the inner surface of the pipe corresponding to the first position based on the result of the comparison between the first measured value of the first parameter and the threshold range predefined for the first parameter.
[0106] The processor may be configured to identify the normal state of the pipe at the second location based on identifying the first measurement value of the first parameter included within the threshold range, and to identify the corrosion state of the pipe at the second location based on identifying the first measurement value of the first parameter outside the threshold range.
[0107] The processor may be configured to transmit location information for the second location and the internal state for the second location to an external electronic device based on identifying the internal state of the pipe for the second location.
[0108] The processor may be configured to control the first motor so that the sensor is adjacent to a third position on the outer surface of the pipe, which is spaced forward or backward from the first position, based on identifying the internal state of the pipe for the second position, and when the sensor is adjacent to the third position on the outer surface of the pipe, acquire the measured values of the plurality of parameters, select a second parameter among the plurality of parameters, identify a second measured value of the second parameter, compare the second measured value of the second parameter with a threshold range predefined for the second parameter, and identify the internal state of the pipe for a fourth position on the inner surface of the pipe corresponding to the third position based on the result of comparing the second measured value of the second parameter with the threshold range predefined for the second parameter.
[0109] The above housing may include a first housing part defining the exterior of the inspection device and a second housing part rotatably coupled to the first housing part. The inspection device may include a second motor configured to rotate the second housing part relative to the first housing part. The sensor and the second motor may be coupled to the second housing part. The processor may be configured to control the first motor so that the sensor is adjacent to the first position based on identifying both the internal state of the pipe for the second position and the internal state of the pipe for the fourth position, and to control the second motor so that the second housing part is rotated relative to the first housing part based on identifying the sensor adjacent to the first position, and when the sensor is adjacent to a fifth position spaced circumferentially from the first position according to the rotation of the second housing part, acquire the measurement values of the plurality of parameters, select a third parameter among the plurality of parameters, identify a third measurement value of the third parameter, compare the third measurement value of the third parameter with a predefined threshold range for the third parameter, and identify the internal state of the pipe for a sixth position on the inner surface of the pipe corresponding to the fifth position based on the result of the comparison between the third measurement value of the third parameter and the predefined threshold range for the third parameter.
[0110] The device described above may be implemented as a hardware component, a software component, and / or a combination of a hardware component and a software component. For example, the device and components described in the embodiments may be implemented using one or more general-purpose or special-purpose computers, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing unit may execute an operating system (OS) and one or more software applications executed on said operating system. Additionally, the processing unit may access, store, manipulate, process, and generate data in response to the execution of the software. For ease of understanding, the processing unit may be described as being used as a single unit, but those skilled in the art will understand that the processing unit may include a plurality of processing elements and / or a plurality of types of processing elements. For example, the processing unit may include multiple processors or one processor and one controller. Additionally, other processing configurations, such as parallel processors, are also possible.
[0111] Software may include computer programs, code, instructions, or a combination of one or more of these, and may configure a processing unit to operate as desired or command the processing unit independently or collectively. Software and / or data may be permanently or temporarily embodied in any type of machine, component, physical device, virtual equipment, computer storage medium or device, or transmitted signal wave so as to be interpreted by the processing unit or to provide instructions or data to the processing unit. Software may be distributed over networked computer systems and may be stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.
[0112] The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., either alone or in combination. The program instructions recorded on the medium may be those specifically designed and configured for the embodiment, or they may be those known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical recording media such as CD-ROMs and DVDs; magneto-optical media such as floptical disks; and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, and flash memory. Examples of program instructions include machine code, such as that generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc. The hardware devices described above may be configured to operate as one or more software modules to perform the operation of the embodiment, and vice versa.
[0113] Although the embodiments have been described above with reference to limited examples and drawings, those skilled in the art can make various modifications and variations from the description above. For example, suitable results can be achieved even if the described techniques are performed in a different order than described, and / or the components of the described system, structure, device, circuit, etc. are combined or assembled in a form different from described, or replaced or substituted by other components or equivalents.
[0114] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims set forth below.
Claims
1. In an inspection device for inspecting a sprinkler pipe, A housing coupled to the pipe so as to at least partially wrap the outer surface of the pipe; A sensor disposed inside the housing, comprising a first coil that applies an induced magnetic field to the pipe based on the input of a first signal, and a second coil configured to acquire a second signal based on the induced magnetic field by interacting with the induced magnetic field; A detection circuit configured to acquire the second signal from the sensor and, based on the second signal, acquire measurement values of a plurality of parameters; A first motor configured to move the sensor forward and backward along the outer surface of the pipe; and It includes a processor configured to control the first motor and to obtain the measured values of the plurality of parameters from the detection circuit, The above processor is, When the sensor is adjacent to a first position on the outer surface of the pipe, the measured values of the plurality of parameters are obtained, and Among the above plurality of parameters, a first parameter is selected, and Identifying the first measurement value of the first parameter above, and The first measured value of the first parameter is compared with a predefined threshold range for the first parameter, and A configuration configured to identify the internal state of the pipe for a second position on the inner surface of the pipe corresponding to the first position, based on the result of comparing the first measured value of the first parameter with the threshold range predefined for the first parameter. Inspection device.
2. In Paragraph 1, The above processor is, Based on identifying the first measurement value of the first parameter included within the above threshold range, the normal state of the pipe for the second position is identified, and Configured to identify the corrosion state of the pipe at the second location based on identifying the first measured value of the first parameter that falls outside the above threshold range, Inspection device.
3. In Paragraph 1, The above processor is, Based on identifying the internal state of the pipe for the second position, configured to transmit position information for the second position and the internal state for the second position to an external electronic device, Inspection device.
4. In Paragraph 1, The above processor is, Based on identifying the internal state of the pipe for the second position, the first motor is controlled so that the sensor is adjacent to a third position on the outer surface of the pipe spaced forward or backward from the first position, and When the sensor is adjacent to the third position on the outer surface of the pipe, the measured values of the plurality of parameters are obtained, and Among the plurality of parameters above, a second parameter is selected, and Identifying the second measurement value of the above second parameter, and The second measured value of the second parameter is compared with a predefined threshold range for the second parameter, and Configured to identify the internal state of the pipe for a fourth position on the inner surface of the pipe corresponding to the third position, based on the result of comparing the second measurement value of the second parameter with the threshold range predefined for the second parameter. Inspection device.
5. In Paragraph 4, The above housing is, A first housing part defining the exterior of the above inspection device, and A second housing part rotatably coupled to the first housing part, and It includes a second motor configured to rotate the second housing part relative to the first housing part, and The sensor and the second motor are, Combined with the above second housing part, The above processor is, Based on identifying both the internal state of the pipe for the second position and the internal state of the pipe for the fourth position, the first motor is controlled so that the sensor is adjacent to the first position, and Based on identifying the sensor adjacent to the first position, the second motor is controlled so that the second housing part rotates relative to the first housing part, and When the sensor is adjacent to a fifth position spaced from the first position in the circumferential direction of the outer surface of the pipe according to the rotation of the second housing part, the measured values of the plurality of parameters are obtained, and among the plurality of parameters, a third parameter is selected, Identifying the third measurement value of the above third parameter, and The third measurement value of the third parameter is compared with a predefined threshold range for the third parameter, and Configured to identify the internal state of the pipe for a sixth position on the inner surface of the pipe corresponding to the fifth position, based on the result of comparing the third measurement value of the third parameter with a predefined threshold range for the third parameter. Inspection device.